Abstract: An apparatus for manufacturing a hollow synthetic resin product, including a movable parison guide and a movable lower molding portion which align an extruding head, the parison guide and an end of the lower molding portion in a perpendicular plane. The lower molding portion is moved in a direction perpendicular to the perpendicular plane while a parison is extruded from the extruding head, while the parison guide is moved in a direction crossing the moving direction of the lower molding portion in accordance with a shape of a groove of the lower molding portion to accommodate a first portion of the parison in the groove. A cutter cuts the parison in a predetermined length when the predetermined length thereof is extruded, while a parison pinch holds a portion of the parison to be cut immediately before the parison is cut.

Abstract: The method includes moving a parison guide and a lower molding portion to substantially vertically align an extruding head, the parison guide and an end of the lower molding portion. Then, the lower molding portion is moved substantially horizontally while extruding a parison from the extruding head, while the parison guide is moved laterally in a direction crossing the moving direction of the lower molding portion in accordance with a shape of a groove of the lower molding portion to accommodate a first portion of the parison in the groove. Subsequently, the parison is cut into a predetermined length when the predetermined length thereof is extruded, while a portion of the parison to be cut is held by a parison pinch.

Abstract: A blowpin assembly for blow molding apparatus wherein the assembly utilizes a molded article shear ring cooperating with a mold ring opening to shear the neck of the molded article following the molding process. The shear ring is mounted upon the blowpin assembly for limited radial and axial movement thereto for automatically aligning itself with the mold opening during shearing.

Abstract: A method is described for stretch blow-moulding thermoplastics bottles (50) from heated parisons of thermoplastics material such as polypropylene. The parisons are severed from thermoplastics sticks (51) each of which is formed of several, e.g. five, parison lengths. The sticks are severed from the leading end of a continuously extended thermplastics tube, and are individually heated in an oven to orientation temperature. After heating, the sticks are presented for severance as successive groups of associated sticks which are advanced longitudinally one parison length at a time while disposed in parallel, laterally aligned relation. The bottles are formed by repeated stretch blow-moulding operations upon the groups of parisons so produced.

Abstract: Apparatus is provided for expanding an earlier-extruded portion (42) of extruded plastic tubing (38) or plastic parison (41) into a first container (96a), for expanding a later-extruded portion (43) of the extruded plastic tubing (38) or parison (41) into a second container (96b), for delaying expanding the second portion (43) with respect to expanding the first portion (42) into the first container (96a) , and for subsequently separating the second container (96b) from the first container (96a).

Abstract: This relates to blow molded plastic containers wherein at least the body of such containers is of a laminated construction including, for example, a barrier layer which in the case of the container receiving carbonated products would be a gas barrier layer. It has been found that delamination does occur and this is now solved by selectively providing the container body with minute vent openings which do not extend entirely through the container body, but into that area where delamination occurs and there is an accumulation of a permeant, such as CO.sub.2. The minute vents may be formed in the exterior wall of the container either by way of piercing pins or by utilizing a laser. In the case of the piercing pins, there are incorporated in the blow mold for blow molding the container from a preform and are generally placed along the parting lines of the blow mold and also in central parts of the wall. The construction and operation of the piercing pins may be provided in several forms.

Abstract: A blow mold for use with the blow pin assembly having article body, neck, and finish defining portions including an anvil portion to permit severing of a flash portion of the parison from the article. A shearing ring portion cooperates with the anvil portion to sever the flash portion of the parison from the article and both portions are inclined with respect to a plane normal to the axis of reciprocation of the blow pin to form an inclined finish on the article. A tip portion has an outer surface cooperating with the finish defining portion to calibrate the thickness of the article between the neck and anvil portions.

Abstract: A double-walled plastic box (20) is molded from a single parison (50) in an unlimited depth by closing the bottom of parison (50) and draping it downwardly over a core (60) so that a leading part of the parison forms an inside wall of the box and a following part of the parison forms an outside wall of the box. After parison (50) is draped over core (60), outer mold parts (61) close around the core and the draped parison; and the box is blown in a cavity between the core and the outer mold parts. The parison can be ballooned while draping down over the core to enlarge the parison to stand out from and surround the core, which can be raised during the draping process. Parison (50) can also be deballooned after draping to stay within the confines of outer mold parts (61) while core (60) raises and while the outer mold parts close.

Abstract: A rotary blow molding machine includes a plurality of mold stations on a rotary carousel. Each mold station includes a pair of mold sections movable toward and away from one another to close or open the mold sections. When closed, the mold sections define a mold blowing cavity and a mold mouth communicating with the blowing cavity and opening external of the closed mold sections. A blowing/neck finishing mechanism preferably is mounted on one of the mold sections for movement between a retracted position where the blow pin is offset from the mold mouth so as not to hinder capturing of the parison in the mold station and a blowing position where the blow pin is inserted in the mold mouth. A pivotal linkage moves the blow pin in an arcuate path toward the mold mouth to insert the blow pin therein to blow a parison received in the blowing cavity and away from the mouth to extract the blow pin from the mouth after parison blowing.

Abstract: A system is disclosed for making a hollow-shaped body from molten resin wherein the method includes the step of cutting a hole through the resin after it is cooled and into a fluid aperture formed during a fluid injection step which distributes the molten resin over the interior surfaces of a mold of the system. The fluid aperture is in communication with the interior of the resulting hollow-shaped body and is preferably located in the runner or sprue of the mold. The fluid is preferably a gas, such as nitrogen. In each of the disclosed embodiments of the invention, a cutting member is located in the mold and has a surface which at least partially defines a resin flow path in the mold. Cutting is accomplished by moving the cutting member in a controlled fashion between a molding position and a relieving position so that the cutting member applies a cutting force to cut the hole. The cutting member includes a fluid-relieving aperture formed therein.

Abstract: A method of making flat bottles with flat or concave bottom by free extrusion of a plastic tube includes blowing of an intermediate form with circular cross section and shaping the latter essentially mechanically to the flat bottle at simultaneous final blowing for achieving clean radii. It is essential that the intermediate form is blown at a length corresponding to about the height of the flat bottle, with a circumference in the body area of -1 to about -10%, however, in the bottom near area of the side walls from 0 to about +15%, with regard to the corresponding circumference of the flat bottle. The radius of curvature at the junction from the body wall to the bottom should correspond to about the radius of curvature at the junction from the body wall of the broad side of the flat bottle to its bottom. The bottom part corresponding to the pinched end of the tube is pinched off during shaping.

Abstract: A blow molding parison (10) being draped around a generally rectangular mold part (12) is spread from its extruded cylindrical shape into a generally rectangular shape (14), as it descends from an extrusion head (11). Before the open bottom (20) of the parison reaches a clamp (25) on the mold part, a jet of air is blown downward through the open bottom to draw in the parison's side and end regions (21 and 22 respectively). This reduces the size of parison (10) and helps it fit within the clamp and also forms the end regions (22) of the parison into a pair of opposed pleats (23) extending inward from the ends of the pinch-off line when clamp (25) closes. Further descending of the parison unfolds the pleats into gussets (24) extending toward corner regions (27) of mold part (12) so that the parison can drape around the mold part corners.

Abstract: A rotary blow molding machine includes a base, a turntable on the base rotatable about a vertical axis and a number of mold units spaced around the turntable. Each mold unit includes a pair of mold halves which close on and capture a growing vertical parison at an extrusion station and then fall away from the parison as the parison is severed. The captured parison is blow molded and cooled as the blow unit is rotated around the turntable. The finished article, commonly a bottle, is ejected from between the mold halves before the mold halves return to the extrusion station.

Abstract: A double-walled plastic box 20 is molded from a single parison 50 in an unlimited depth by closing the bottom of parison 50 and draping it downwardly over a core 60 so that a leading part of the parison forms an inside wall of the box and a following part of the parison forms an outside wall of the box. After parison 50 is draped over core 60, outer mold parts 61 close around the core and the draped parison; and the box is blown in a cavity between the core and the outer mold parts. The parison can be ballooned while draping down over the core to enlarge the parison to stand out from and surround the core, which can be raised during the draping process. Parison 50 can also be deballooned after draping to stay within the confines of outer mold parts 61 while core 60 raises and while the outer mold parts close.

Abstract: A rotary blow molding machine includes a base, a turntable on the base rotatable about a vertical axis and a number of mold units spaced around the turntable. Each mold unit includes a pair of mold halves which close on and capture a growing vertical parison at an extrusion station and then fall away from the parison as the parison is severed. The captured parison is blow molded and cooled as the blow unit is rotated around the turntable. The finished article, commonly a bottle, is ejected from between the mold halves before the mold halves return to the extrusion station.

Abstract: An improved cutting sleeve for the removal of flash from thermoplastic containers is disclosed. When used in conjunction with a blow-pin the cutting sleeve is movable relative to the blow-pin. In a preferred embodiment the cutting sleeve comprises two portions of different diameter. Use of the cutting sleeve results in an improved finish of the container neck.

Abstract: Apparatus is provided for straightening a parison tube (58b) in an apparatus of the type in which thermoplastic tubing (48) is extruded into open halves (24 and 26) of a blow mold (22) and a parison tube (58b) is severed from the thermoplastic tube (48) concurrently with the blow mold being rotated around an axis (28). The present invention orients the curvature of the parison (58b) in a predetermined plane (52) by accelerating the parison tube (58b) transversely to the axis (90) of the parison tube (58b); and then the parison tube (58b) is straightened by applying jets of air (76) against the neck and moil portion (68) of the parison tube (58b), thereby straightening the parison tube (58b), and thereby preventing the neck and moil portion (68) of the parison tube (58b) from being pinched between the mold halves (24 and 26) in the area of the neck and moil cavity (38).

Abstract: Apparatus and method are provided for straightening a parison tube (58b) in an apparatus of the type in which thermoplastic tubing (48) is extruded into open halves (24 and 26) of a blow mold (22) and a parison tube (58b) is severed from the thermoplastic tube (48) concurrently with the blow mold being rotated around an axis (28). The present invention orients the curvature of the parison (58b) in a predetermined plane (52) by accelerating the parison tube (58b) transversely to the axis (90) of the parison tube (58b); and then the parison tube (58b) is straightened by applying jets of air (76) against the neck and moil portion (68) of the parison tube (58b), thereby straightening the parison tube (58b), and thereby preventing the neck and moil portion (68) of the parison tube (58b) from being pinched between the mold halves (24 and 26) in the area of the neck and moil cavity (38).

Abstract: A transparent thin bottle-shaped container is produced by means of a technology for biaxial orientation blow molding a cylindrical piece with a bottom from polyethylene terephthalate material. The pieces are molded in large number in each injection molding process of an injection molding machine. The pieces thus formed immediately after the injection molding are held simultaneously in large number at the gates integrally projected therefrom by a base plate moved forward at the front of the mold in the injection molding machine. They are then conveyed to a gate cutting unit provided near the injection molding machine. The gates are cut from the pieces sequentially by the gate cutting unit and are conveyed onto a conveyor. The pieces are gradually cooled from the hot molded temperature during the conveyance and are additionally cooled while being conveyed on an oblique conveyor installed with a cooler to room temperature or lower predetermined temperature.

Abstract: A tranparent thin bottle-shaped container is produced by means of a technology for biaxial orientation blow molding a cylindrical piece with a bottom from polyethylene terephthalate material. The pieces are molded in large number in each injection molding process of an injection molding machine. The pieces thus formed immediately after the injection molding are held simultaneously in large number at the gates integrally projected therefrom by a base plate moved forward at the front of the mold in the injection molding machine. They are then conveyed to a gate cutting unit provided near the injection molding machine. The gates are cut from the pieces sequentially by the gate cutting unit and are conveyed onto a conveyor. The pieces are gradually cooled from the hot molded temperature during the conveyance and are additionally cooled while being conveyed on an oblique conveyor installed with a cooler to room temperature or lower predetermined temperature.

Abstract: A process and apparatus for the blow molding of oriented, hollow containers from tubular parisons in which a tubing of plastic material at a suitable orientation temperature for the material is passed by a puller assembly to a cutter assembly. The free end of the tubing is grasped by a parison transfer assembly, after which parisons are cut from the tubing by the cutter assembly and positioned by the transfer assembly for placement within blow molders. The first of two blow molders moves toward the tubing centerline from a molding position to receive a parison. The parison transfer assembly is extended vertically to place the parison within the molding cavity of the open blow molder. The upper end of the parison is grasped by a tube clamp, and as the parison transfer assembly retracts, the parison is stretched prior to molder closure. The closed blow molder returns to its molding position to complete the blow molding of a finished, oriented container.

Abstract: The disclosure is of a tab-pulling device comprising a simple dovetail slide that grips a tab of a blow molded object between it and a planar, stationary jaw. As the tab-pulling jaw moves downward, a plunger or pusher finger carried thereon is projected outward to strip the tab from the movable jaw.

Abstract: An extrusion blow molded container is provided having an integrally formed generally annular pouring lip including an upwardly facing convex surface beginning at a generally vertical inner wall of the container and curving through an arc of less than 180 degrees. The lip is undercut forming a sharp downwardly directed annular edge on the lip. The lip can be formed by cutting the lip with a downwardly curved cutting tool bearing against an upwardly curved anvil, the cutting tool forming the upwardly facing convex surface of the lip and the anvil forming the undercut lower surface of the lip.

Abstract: This relates to a bottom construction for a blow molded container wherein a central portion of the bottom is axially inwardly recessed and pushed in and where, in the forming of the central portion, there are two axially offset halves so as to define an upstanding rib. The rib sufficiently reinforces the recessed bottom portion against inversion even when the wall thickness of the bottle or container is reduced.

Abstract: This invention relates to a blow pin assembly for use in extrusion blow molding processes to yield thermoplastic containers having a dripless pour lip. The dripless pour lip is achieved by forge forming a portion of the neck moil, which moil is characteristic of extrusion blow molding processes. The shape of the pour lip is dictated by a downwardly facing groove carried by a cutter collar which is part of the blow pin assembly. This groove coacts with a split annular anvil carried by the split blow mold to achieve the necessary forge forming of the container lip. The cutter collar also achieves removal of the excess neck moil material by a shearing action achieved between the outside edge of the groove and the split annular anvil.

Abstract: This invention relates to a blow pin assembly for use in extrusion blow molding processes to yield thermoplastic containers having a dripless pour lip. The dripless pour lip is achieved by forge forming a portion of the neck moil, which moil is characteristic of extrusion blow molding processes. The shape of the pour lip is dictated by a downwardly facing groove carried by a cutter collar which is part of the blow pin assembly. This groove coacts with a split annular anvil carried by the split blow mold to achieve the necessary forge forming of the container lip. The cutter collar also achieves removal of excess neck moil material by a cutting action achieved between the outside edge of the groove and the split annular anvil.

Abstract: A headpiece for a collapsible tube is a unitary member made up of two different plastics, each plastic providing a different property for the headpiece. The headpiece is formed by extruding on top of one another a first torus like annulus of a first plastic and a second torus like annulus of a second plastic. The two plastic annuli are simultaneously molded to form the headpiece. One plastic forms, primarily, the outer portion of the headpiece and the other plastic forms, primarily, the inner portion of the headpiece.The machine for molding the plastic head includes a work table rotatably indexed from station to station at which various operations are performed. The mandrel which holds the cylindrical body, to which the head is molded, is movable from an inboard position to an outboard position so that operations can be performed relative to it. The molding operation is performed at the inboard position. The loading, extruding, capping and ejection operations are performed at the outboard position.

Abstract: A blow molding machine is disclosed for hollow plastic articles. The machine includes a clamp mechanism for a pair of mold sections. It comprises a body disposed below an extruder at an extruding station and a blow pin at a blow station and carrying opposed platens for supporting the mold sections. Each of a pair of levers is pivotally coupled with a respective platen and with the body and the levers are connected together by a pull bar. An actuating means displaces one of the platens relative to the body and equal and opposite motion is transmitted through the levers and the pull bar to the other platen for opening and closing the clamp. A lifting mechanism supports the clamp for movement between the extruding station and the blow station. The lifting mechanism is adapted for vertical motion by a hydraulic motor acting on a lifting frame. The frame is mounted by pivot links on the machine base and pairs of links are connected by a shaft with a crank arm, the crank arms being connected together by a tie rod.

Abstract: An improved apparatus for blow molding and conditioning synthetic resin containers, comprising 2 end walls, to which the permanent molds that jointly constitute one (1) forming mold are locked in a removable fashion, these being movable synchronously between 2 stations, namely an extrusion and a blowing station, powered concurrently in opposite directions by the operating devices with which the apparatus is equipped. Into the forming mold, at the extrusion station, is extruded a tubular element of synthetic resin having notable plastic deformation characteristics which, as a result of compressed air being blown therein, is formed into a corresponding synthetic resin container.

Abstract: A process and an apparatus for blow molding completely finished hollow plastic containers of biaxially oriented material and having a finished neck. A dual-diameter blow pin is positioned between separable mold sections and is movable along its longitudinal axis. A crammer sleeve is reciprocably disposed about the blow pin, and gripping jaws are positioned to close around the blow pin. One end of a heated tubular parison is positioned over a larger-diameter portion of the blow pin, and the parison is longitudinally stretched, axially orienting the material and causing the parison to neck down onto a smaller-diameter portion of the blow pin. The mold sections are closed over the stretched parison, the blow pin is longitudinally inserted to size the inside diameter of the neck opening, the crammer sleeve is inserted to cram axially-oriented material into the neck finishing cavity of the mold and to finish form the neck opening, and the tail surplus material is severed.

Abstract: An apparatus for removing a waste portion from a blow molded article is disclosed. The apparatus removes the waste portion while the article is enclosed within the blow mold and features a gripping structure for gripping the waste portion and a power assembly associated with the gripping structure to move the gripping structure from the article, thereby pulling the waste portion from its point of attachment with the article. The gripping structure includes two opposed gripping means which are arcuately movable about their respective pivot points. Each pivot point is laterally displaced from the gripping structure and positioned along a line extending through the shortest distance from the pivot point to that portion of the gripping structure which is closest to the attachment of the waste portion to the article.

Abstract: A device for cutting off a sprue of a parison with a bottom is capable of cutting off the sprue in a heating furnace. Cutter plates for cutting the sprue and an outlet for discharging the cut sprue are disposed at the bottom of the heating furnace. Cutting off the sprue may thus be performed without changing the usual molding cycle of the hot parison molding method. The device may alternatively be applied to the cold parison molding method.

Abstract: In the manufacture of oriented hollow articles made of thermoplastic material by the steps of extruding a continuous hot tubular parison of thermoplastic material; pre-blowing such parison in a pre-blowing mold to produce preforms having a cylindrical body with a diameter not more than 20% greater than that of the parison; thermally conditioning the resulting preforms at a temperature sufficient to cause orientation of the thermoplastic material when it is being stretched; and effecting a final blow-molding of the thermally conditioned preforms, the mechanical properties of the resulting articles in the vicinity of their base are improved by carrying out the pre-blowing step while holding each parison tightly between two half-molds defining a cavity which has the shape, at the location of the base of the preform, of a quarter sphere of diameter equal to that of the preform, and cutting off the resulting flash by means of an elongated blade having a semi-circular cross section and a diameter corresponding to t

Abstract: An apparatus is disclosed for preparing a tubular parison, which is continuously extruded in an extrusion direction from an extrusion head, and for subsequently transferring the parison to a blow molding machine. The apparatus provides improved control of the wall thickness of the parison and can be used with particular advantage in making articles requiring parisons of large diameter and length. The apparatus includes a parison stretching mechanism that grasps and seals the parison at one location along its length and stretches the parison at a controlled rate while being extruded in the extrusion direction. The apparatus also sequentially severs sections of the parison from the remaining continuously extruded portion and transfers each section to a stationary blow molding machine out of the path of this remaining portion.

Abstract: The disclosure relates to a method and apparatus for moulding hollow plastic articles each having a relatively wide neck portion. The method includes the step of mechanically expanding an end portion of a tubular parison from which the article is to be moulded, and introducing into the expanded end portion of the parison a mandrel which cooperates with the mould to form the neck of the article. Subsequently, the parison is expanded by internal air pressure to form the remainder of the article. Movable mould inserts for relieving pressure around the neck of the article are also disclosed.

Abstract: A method of molding hollow bodies by continuously downwardly extruding a melt of synthetic resin from a die to form a tubular parison, closing and sealing the free end of the parison, holding the parison, cutting the parison thereby forming a cut-off tube with a closed sealed end and blowing a fluid into the cut-off tube retained in the mold thereby forming a hollow body. Certain apparatus modifications are disclosed such that the step of closing and sealing comprises moving sealing members from outside the parison towards its center, bringing the sealing members into contact with each other while filling the resin of the free end into a space provided between the end of a mandrel extension and the sealing members. The holding step consists of holding a portion of the moving parison which becomes the cut-off tube by its outside surface.

Abstract: A blow molding machine for the manufacture of products such as bottles from a continuously extruded parison of plastic material. Two pairs of horizontally reciprocable mold sections alternately take a parison from a central station and transport it to either of two blow molding stations having vertically movable blow pins. The mold section platens carry laterally extending trimming elements and, when each pair of mold sections returns to retrieve another parison, the trimming elements trim flash from the molded product which hangs from the blow pin. The product is then transported to a delivery station by the trimming elements as the mold sections return to the blow molding station. The platens and blow pin stations are all supported by the vertically reciprocable table. As a knife severs the parison held by a pair of mold sections from the extruder and the mold sections start moving toward the mold station, the table lowers to prevent resticking of the material being continuously extruded.

Abstract: Parisons are presented at a pickup station related to a plurality of spaced molding stations and a spaced discharge station, so that a plurality of angularly spaced pickup and mold loading devices and a plurality of angularly spaced article transfer devices are operable on a cyclically oscillatable transfer mechanism for orienting the loading devices alternately in a parison pickup position at the pickup station and a mold loading position at the respective molding stations, and for orienting the article transfer devices alternately in an article stripping position at the molding stations and in a discharge position at the discharge station. In each cycle of operation, all of the devices are operated in coordination, and at least one parison is picked up at the pickup station, then at least one previously picked up parison is loaded into one of the molds, another mold is stripped of a molded article, and a previously stripped article is discharged at the discharge station.

Abstract: A blow molding machine for the manufacture of products such as bottles from a continuously extruded parison of plastic material. Two pairs of horizontally reciprocable mold sections are shown which alternately take a parison from a central station and transport it to either of two blow molding stations having vertically movable blow pins. The mold section platens carry laterally extending trimming elements and, when each pair of mold sections returns to retrieve another parison, the trimming elements trim flash from the molded product which hangs from the blow pin. The product is then transported to a delivery station by the trimming elements as the mold sections return to the blow molding station. The platens and blow pin stations are all supported by a vertically reciprocable table. As a knife severs the parison held by a pair or mold sections from the extruder and the mold sections start moving toward the mold station, the table lowers to prevent resticking of the material being continuously extruded.

Abstract: A method of and apparatus for separating off waste material from a moulded article in the production of hollow articles of thermoplastics material by a blowing process in a multi-part mould involves pinching together regions of a partly-made article during closure of the mould parts around it and once a satisfactory weld seam has been created at the pinch regions then increasing the closure speed of the mould parts. Control of the mould closure speed may be effected by open loop control or by automatic control, and may be made dependent on time and/or on displacement of the mould parts. The increased final closure speed can with advantage be equal to the mould closure speed at which the mould parts are moved up to the beginning of the pinching process.

Abstract: The present invention relates to a method and apparatus for simultaneously cutting and supporting an extruded parison by an upper and lower pair of chucks, and for stretching by a preselected amount the cut parison supported between the upper and lower pair of chucks as the cut parison is delivered to a mold, whereby the cut parison is of a preselected length and outer diameter when it is delivered to the mold.

Abstract: A rotary blow molding machine includes a rotor mounted on a horizontal driving shaft, a recovery hopper, an ejector mechanism, and mold stations mounted on the outer periphery of the rotor, which mold stations are radially disposed and circumferentially equally spaced, the mold stations each carrying thereon a split mold unit capable of opening and closing in the direction of the width of the outer peripheral surface of the rotor by a mold opening/closing mechanism, a mold clamping mechanism and a flash blow-pipe, the said split mold unit having a mold-release mechanism. It is so constructed as to produce blow moldings successively continuously at high speed and completely automatically during a single rotation of the mold stations on and along the same circular rotation track.

Abstract: Apparatus for blow molding consisting of a preform station where a blank is shaped around a mandrel and a blow station where the blank is formed in a mold, the mandrel being removed from the blank and a compressed air member being applied to the orifice of the blank.

Abstract: An apparatus for manufacturing a blown hollow body having a closed bottom portion from a synthetic material comprising a ring nozzle extruder, a head portion forming section, and a multisectional blow-mold wherein extension pieces of each mold section from a cutting edge that cuts the extrusion and closes the bottom of the hollow body as the mold sections are brought together just prior to blowing.

Abstract: A tray of thermoplastic material having means releasably latching a power tool in storage position thereon with the tool handle oriented to serve as the carry handle for the tool and attached tray, the tray providing storage for the power cord and accessories. An opening through a wall of the tray is defined by shearing the material during the blow mold cycle.

Abstract: A method of and apparatus for separating off waste material from a moulded article in the production of hollow articles of thermoplastics material by a blowing process in a multi-part mould involves pinching together regions of a partly-made article during closure of the mould parts around it and once a satisfactory weld seam has been created at the pinch regions then increasing the closure speed of the mould parts. Control of the mould closure speed may be effected by open loop control or by automatic control, and may be made dependent on time and/or on displacement of the mould parts. The increased final closure speed can with advantage be equal to the mould closure speed at which the mould parts are moved up to the beginning of the pinching process.

Abstract: An improved method of blow molding bottles of thermoplastic material wherein intermittent extrusion apparatus is employed to produce bottles with finished necks free of external blemishes, the method including the steps of intermittently extruding tubular parisons from an annular orifice, enclosing the first tubular parison in a mold that has an interior cavity that defines the bottle and also defines a dome radiating outward from the upper end of the bottle neck, immediately blowing the parison essentially to the shape of the cavity, but as an incident to the blowing of the parison and to the interruption of the extrusion, causing the thermoplastic material to be severed at the extrusion orifice, and immediately shifting the mold enclosed article to a shaping station while the article is still at a temperature sufficient for subsequent shaping operations, and at the shaping station finish blowing the article while trimming and at least partially compression-molding the neck.

Abstract: In a blow molding machine a tubular parison is extruded around a blow pin, a two-part mold is closed and the parison is expanded by air pressure against the internal wall of the mold. Each mold half at its top neck carries a sealing member comprising a first insert, which is a shear insert, in the form of an approximately flat one-half ring to sever the parison against the blow pin; a second insert, which is a seal insert, in the form of a flat approximately one-half ring, to seal the parison against the blow pin; and a base member, in the form of an approximately one-half ring, having an inverted shelf to locate and support the shear and seal inserts.

Abstract: In a blow molding machine a tubular parison is extruded around a blow pin, a two-part mold is closed and the parison is expanded by air pressure against the internal wall of the mold. Each mold half at its top neck carries a sealing member comprising a first insert, which is a shear insert, in the form of an approximately flat one-half ring to sever the parison against the blow pin; a second insert, which is a seal insert, in the form of a flat approximately one-half ring, to seal the parison against the blow pin; and a base member, in the form of an approximately one-half ring, having an inverted shelf to locate and support the shear and seal inserts.