Abstract: A process for the preparation of thermal insulation sheets fashioned from certain unseparated mixtures of post-consumer plastic articles and the article, itself, is disclosed. The mixtures of such articles contain polyethylene terephthalate (PET) and polystyrene (PS) and optionally also articles made of high density polyethylene (HDPE). An unseparated mixture of such articles is provided. This mixture is crushed and shredded to form plastic flakes, and these plastic flakes are then homogenized. Homogenization of the flakes can be carried out either by melt-blending them or by further comminution to produce very fine particles of the mixed plastics. The resulting homogenized mixture of plastic types is then compression molded into sheets ranging in thickness from about 3 to 10 mm.

Abstract: A system for kneading and extruding a material includes a crusher for crushing the material into coarse particles, an extruder for conveying and extruding the material crushed by the crusher, a gear pump for receiving and discharging the material extruded from the extruder, and a kneading and extruding apparatus for kneading the material discharged from the gear pump and continuously extruding the kneaded material. Therefore, a material is accurately quantified and highly uniform, resulting in reduced product variations and ensured consistent quality.

Abstract: The present invention including the disclosed embodiments thereof generally relate to extruding multiple laminated flow streams using microlayer extrusion, and in particular to creating and forming products with electrical properties that are formed from layers and particles with dimensions in the micro to nanometer range.

Abstract: A mold for manufacturing hemispherical sections for a golf ball includes a first mold plate including a first cavity, a second mold plate including a second cavity, and a midplate. The midplate includes an indentation on a first side of the midplate and a projection on a second side of the midplate. The indentation of the midplate corresponds to the first cavity of the first mold plate. The projection of the midplate corresponds to the second cavity of the second mold plate.

Abstract: The invention relates to an extrusion blow molding machine (1) with at least one extrusion head (2) and with at least two sheet dies (3), arranged next to one another, for the extrusion of sheet-like plastic preforms (4), with a multipart molding die (5) for processing two preforms into an essentially closed hollow body, having a device for handling the preforms (4). The device for handling the preforms comprises at least two grippers (10), arranged next to one another on a common carrier (8), for receiving the preforms (4), the distance between the grippers (10) being variable.

Abstract: A photovoltaic panel made by direct co-extrusion of a plurality of superimposed polymeric layers and a plant for carrying out such a process.

Abstract: Device for manufacturing the tread of a tire, said tread comprising a plurality of relief tread elements of height h whose radially outer surface is designed to be in contact with the ground when the tire is rolling on the road surface, comprising a rotary support suitable for supporting a base strip (MB) forming a receiving surface (S), an extrusion die (1) comprising a plurality of extrusion nozzles whose outlet channels are oriented radially approximately perpendicular to the receiving surface (S), at least two compound supply means, each feeding into one or more separate extrusion nozzles, and means for positioning and moving the extrusion die relative to the receiving surface (S).

Abstract: A photovoltaic panel made by direct co-extrusion of a plurality of superimposed polymeric layers and a plant for carrying out such a process.

Abstract: A honeycomb segment-forming die includes: an introducing portion provided on an introduction face side and having a plurality of back holes, and a forming portion provided on an formation face side and having slits communicating with the back holes. The forming portion has a polygonal outer peripheral shape and forms a prismatic honeycomb segment by passing kneaded clay for forming which is introduced from the back holes of the introducing portion through the slits of the forming portion, and a gap between slits formed in each of corner portions including a vertex of the polygonal forming portion is larger than a gap of slits formed in the central portion of the forming portion. This enables to form a honeycomb segment having high compressive strength.

Abstract: High-capacity extrusion die assemblies (20, 90, 130, 140, 180, 252) each having a tubular sections (44, 146, 162, 268) and an elongated, axially rotatable, helically flighted screw section (56, 56a, 152, 168, 276, 278) which cooperatively define frustoconical, outwardly diverging material flow paths (75, 160, 291) at constant or differing divergence angles of from about 1-11°. The use of diverging tubular sections (44, 146, 162, 268) and screw sections (56, 56a, 152, 168, 276, 278) permits the use of larger die plates (76, 118, 292) with an increased number of die openings (80, 124, 296). This allows significant increases in extrusion production rates. The die assemblies (20, 90, 130, 140, 180, 252) can be used in the production of a wide number of human foods or animal feeds, and particularly aquatic feeds of the floating or sinking variety.

Abstract: A method of manufacturing a product, including extruding a parison, and separating the parison into parison halves by cutting a partially expanded parison or by pulling apart a longitudinally weakened parison, and forming the parison halves against corresponding mold halves. The method may also include applying a film against the parison halves and/or the mold halves, and forming the film and parison halves against the mold halves to produce multi-layer product halves. Apparatuses for performing the method are also disclosed.

Abstract: A method and a device for melt spinning and depositing synthetic filaments into a nonwoven material are described. The synthetic filaments are extruded and pulled off here simultaneously next to one another in several filament groups and deposited jointly on a belt. Taking into consideration a later final processing of the nonwoven material, the filaments of the filament groups are deposited next to one another to form separate filament webs which are guided next to and parallel to one another. Narrower nonwoven webs can be produced even from very large production widths. For this purpose, the extrusion means and the pull-off means are disposed above the belt in such a manner that the filaments of the filament groups can be laid to form separate nonwoven webs.

Abstract: The invention relates to a method for manufacturing a profiled flexible bead (1) in a polymer material on a glazing (2) by encapsulation, the said device comprising a step of moulding, having brought at least one moulding element (3, 3?) into contact with the said glazing (2), by means of at least one sealing system (4), characterized in that at least one vent is formed inside the said sealing system (4).

Abstract: A method for separating a portion of extruded material from the continuous strip leaving an extruder, consisting of passing in front of the extrusion nozzle withdrawal means associated with at least one cutting means; said withdrawal means and said at least one cutting means are made to move independently of each other with velocities, in the sense of vectors, which differ from each other and differ in relation to the material portion separated.

Abstract: A process and apparatus for the production of a spiral or coil shaped puffed extrudate. A tube or other peripheral containment vessel is placed at the exit end of an extruder die. A force or resistance is then applied on the extrudate downstream of the glass transition point, thereby causing the extrudate to back up and coil in the containment vessel.

Abstract: A method and apparatus for bonding molded pieces including left and right molds, a sheet material setting mechanism for inserting sheet material acting as a bonding medium between the left and right molds, a sliding blade portion that has a cutting blade disposed at a front end thereof for cutting the sheet material, the cutting blade being formed so as to be along outer circumferential surfaces of the molded pieces on a left side of the right mold and the sliding blade portion being movable to left and right inside the right mold, a driving mechanism for moving the sliding blade portion to left and right, a sliding blade bearing portion formed on a right side of the left mold such that the blade bearing portion and sliding blade bearing portion are movable to the left and right inside the left mold, and a spring member for pressing the sliding blade bearing portion to the right.

Abstract: Hollow extrusions are formed by initially extruding a plurality of separate strands adapted to form segments of the completed hollow extrusion in their positions corresponding to the locations of those segments in the finished extrusion. Webs between these strands are then formed by feeding an afterflow of the melt at press pressure into the shaping channel in the calibrator downstream from the die zone so that under the pressure of this melt and the melt heat, the webs fuse to the ends of ribs of the separate strands.

Abstract: A visual effect, such as a granite-look, is produced in a thermoplastic product by directly applying a sufficient amount of at least one color-containing thermoplastic resin system to the surface of an extruded sheet of a thermoplastic resin. The color-containing thermoplastic resin system is applied onto the extruded sheet after it emerges from the die and prior to it entering the rollstack.

Abstract: A method of extruding a homogeneous plastic rod substantially free of shrink voids, the method having the steps of: extruding a rod central portion of plastic material having a glass transition point and a Vicat softening point below the glass transition point, the rod central portion having a center core and an outer skin; cooling the rod central portion while maintaining the outer skin above the Vicat softening point until the center core is cooled to approximately the Vicat softening point; using an extruder to extrude around the rod central portion a sheath of the same plastic material, the sheath having an outer skin and inner and outer portions, such that the rod central portion acts as a heat sink for the inner portion of the sheath, and such that, at the extruder, the plastic material forming the outer skin of the rod central portion is melted upon contact with the plastic material forming the sheath and the plastic material of the rod central portion and the plastic material of the sheath form the ho

Abstract: A PC strand is coated with rust inhibitive material of thermoplastic resin so as to wholly close spaces left around a core and peripheral wires twisted around the core, thus preventing the core and wires from rusting. The strand coated with the rust inhibitive material can be produced without being untwisted by use of an extruding machine having an auxiliary pressure head connected to a cross head.

Abstract: Coextrusion apparatus for forming tubular elastomeric ply made up of first, second and third concentric streams of elastomeric material and a pair of coaxial helical patterns of individual reinforcing elements wound in opposite direction with respect to each other contained within the first and third streams of elastomeric material and separated by the second stream of elastomeric material. A pair of reinforcing element guides are rotatably mounted within the apparatus between stationary flow channels for the three streams of elastomeric material, and are rotated in opposite directions with respect to each other. The two helical patterns of reinforcing elements and three streams of elastomeric material merge together substantially simultaneously in concentric circles which lie in a plane generally perpendicular to a central axis of the coextrusion apparatus to form the tubular ply. A method for producing such a reinforced tubular elastomeric ply also is presented.

Abstract: A method for fabricating a rubberized wire sheet passes a plurality of wires through an extruder to coat each of the plurality of wires with rubber to form rubberized wires, and passes the plurality of rubberized wires through a calender roller system to form them into the rubberized wire sheet having a desired width. The rubberized wires may be further coated with rubber when calendered in the calender roller system. This method demonstrates an improvement in rubber impregnatability, topping accuracy, processability, and quality.

Abstract: A twisted wire manufacturing apparatus is provided with a plurality of injection dies communicating with an annular groove formed in a rotary head. An annular shoe for gradually reducing a sectional area of the annular groove is slidably fitted to the annular groove. Raw material is supplied into the annular groove and raw wires are injected from the injection dies. One of the plurality of injection dies provides an increased injection resistance to reduce the injection speed of a core raw wire injected from that injection die relative to the injection speed of outer layer raw wires injected from other injection dies.

Abstract: Process for the manufacture of continuous moulded bodies from structures of reinforcing fibres impregnated with thermoplastic plastics, wherein a structure of reinforcing fibres is passed through a melt of the thermoplastic at a pressure of 1 to 800 bar for a length of at least 300 mm and a device for carrying out the process.

Abstract: Method in manufacturing a heat insulated tube includes a tube (17) for conducting fluid and a sheath (12) enclosing said tube, a heat insulating material (15) being disposed between the fluid tube and the sheath. The sheath is being extruded in an angle extruder die (10) while the fluid tube and the heat insulating material enclosing said tube are being fed axially through the angle extruder die as the sheath is being extruded around the heat insulating material. Then the sheath (12) extruded from the angle extruder die is kept spaced from the heat insulating material (15) enclosing the fluid tube (17), over an initial length of the axial movement thereof up to chains of chill molds (13) for imparting to the sheath a corrugated shape by forming the sheath against the chains of chill molds under the influence of negative pressure. The invention also relates to a device in extruders having an angle extruder die (10) for the manufacture of the heat insulated tube.

Abstract: In the forming of an article by blow molding parisons into conformity with cavities of an array of mold sections wherein parisons in the form of tubes are extruded from an extruder into an array of neck molds on a head, the head is moved axially away from the extruder to define the parisons, mold sections are closed about the parisons, and the parisons are blown outwardly, an apparatus for application of labels to the hollow blown plastic articles which comprises an array of vacuum cups mounted on the head and movable with the head and a mechanism operable to move the vacuum cups outwardly to engage labels on magazines and move the labels inwardly toward the head and to thereafter move the labels outwardly and deposit them in the mold cavities when the head moves adjacent the mold cavities.

Abstract: In the forming of an article by blow molding parisons into conformity with cavities of an array of mold sections wherein parisons in the form of tubes are extruded from an extruder into an array of neck molds on a head, the head is moved axially away from the extruder to define the parisons, mold sections are closed about the parisons and the parisons are blown outwardly and a take out mechanism grasps and removes the containers after the mold sections are opened, the apparatus for application of labels to the hollow blown plastic articles which comprises a label carrier mounted for reciprocating movement between the open mold sections and supporting an array of spaced vacuum pick up devices.

Abstract: A method and an apparatus for producing multilayer panels. In the method for producing multilayer panels from extrudable plastic, two plastic strips are fed from extruders to a roll-arrangement and are joined together, with an inclusion of material therebetween. The purpose of the invention is to produce predeterminable patterns and structures upon introducing the material. In order to achieve this result, the material in the form of threads, is introduced individually and independently of each other into a gap in an arrangement of rolls, and the threads are aligned, by means of guide-means, in relation to each other and to the gap.

Abstract: A shear head in which an extruded vulcanizable composition meets preheated reinforcing strands has a compartment adjacent a mouth of the head which is evacuated to reduce the danger of gases affecting adhesion of the strands to the composition.

Abstract: An apparatus and a method of manufacture for discrete elastomeric material components comprising extending material through a die onto the surface of a component holding member, securing the leading end of the extrudate to said member, effecting relative movement to lay the extrudate on the holding member so that the component is produced on said member. The invention also provides for transfer of the component from the member.

Abstract: An extrusion system is provided for covering a conductor (14) with a crystalline thermoplastic elastomer insulating material. The plastic material is tubed onto the conductor by apparatus which includes a core tube (61) that is mounted in an extruder crosshead (41) such that its free end is positioned within the interior of a die (81, 101) and is spaced from an orifice of the die a predetermined percentage of the land length of the die. A flow passage between the core tube (61) and a wall which defines the die cavity is controlled in accordance with the relative value of the thermal energy which is released by the insulating material at the onset of crystallization. In one arrangement, which has been found to be suitable for a crystalline thermoplastic elastomer having a relatively high value of released thermal energy, the die cavity and the core tube are arranged to provide a gradually converging path toward the die opening.

Abstract: The invention relates to a method and a device for manufacturing multi-ply sheets of extrudable plastics material supplied by way of at least two webs which are produced by extruders having flat sheet dies and which are bonded to a structured insert web by means of rolls. Moreover, the invention relates to multi-ply sheets thus produced, especially for use with a shower enclosure. In manufacturing such multi-ply sheets it is difficult to obtain a reliable bond between the webs and the structured web without sophisticated machinery. There is also the requirement that the structured web be uniformly introduced between the webs. The invention proposes to feed these webs to a single common set of rolls and to arrange the flat sheet die of at least one extruder so close to a set of rolls that a reliable permanent bond to the structured web and/or at the other web is obtained by the heat accumulated and carried in the one web just extruded.

Abstract: An apparatus for manufacture of milk chocolate-coated toffee candy pieces that comprises a toffee header with means connected to the header for heating a mass of toffee to a softened temperature sufficient to permit portions of it to be pulled from the mass. The header has spaced orifices for the toffee to exit as strands. A rotary toffee forming device is mounted beneath the orifices. Means is provided for reciprocating the header back and forth with the fine toffee strands being drawn from the orifices by the rotary movement of the rotary toffee forming device. Means is provided for transversely severing outer ends of the axially moving lengths of cores with consecutive cuts to form successive toffee pieces of toffee cores. A chocolate coating bath is provided for first immersing the bottoms of the toffee cores in a bath of milk chocolate and then for flooding chocolate over the tops of the cores to completely coat the cores.

Abstract: A method and system for applying a foamed binding agent to a fibrous web is disclosed. The invention is characterized by the use of an extruder having an upper lip extending 1/16 to 1/4 inch beyond the lower lip, and by the drawing of a vacuum beneath the applied foam, said characteristics being critical to the formation of a uniform foam layer atop the web. A second, more substantial vacuum is then applied beneath the web to essentially completely draw the binding agent into the web thereby providing substantial inter-fiber bonding.

Abstract: There is disclosed an apparatus for manufacturing a synthetic resin hose having a tubular reinforcing member embedded therein, which comprises a hollow cylindrical member having diameter adjusting discs provided with yarn guide holes for guiding a plurality of bonding-agent applied warps to the outer peripheral surface of the hollow cylindrical member, and an adjusting disc for guiding braiding yarns to the outer peripheral surface of a tubular member formed by said plurality of warps; a braiding machine surrounding said hollow cylindrical member and weaving the braiding yarns into a braided member; a first heating unit surrounding said hollow cylindrical member and bonding the warp tabular member to the braided member at the contacts therebetween, thereby heat-setting a tubular reinforcing member consisting of the warp tubular member and the braided member; a resin applying unit having manifolds and die for coating synthetic resin to the inner and outer peripheral surfaces of said tubular reinforcing member;

Abstract: A method and system for applying a foamed binding agent to a fibrous web is disclosed. The invention is characterized by the use of an extruder having an upper lip extending 1/16 to 1/4 inch beyond the lower lip, and by the drawing of a vacuum beneath the applied foam, said characteristics being critical to the formation of a uniform foam layer atop the web. A second, more substantial vacuum is then applied beneath the web to essentially completely draw the binding agent into the web thereby providing substantial inter-fiber bonding.

Abstract: An extrusion system for covering a flexible conductor (14) with a crystalline thermoplastic elastomer insulating material by tubing the plastic onto the conductor includes a core tube (61) which is mounted in an extruder crosshead (41) such that its free end is positioned within the interior of the extruder die (59). The free end of the core tube is spaced from the die opening a predetermined percentage of the land length of the die. In this arrangement, which has been found to be suitable for a crystalline thermoplastic elastomer having a crystallization initiation temperature which is capable of being substantially near to its melting point temperature, the crosshead and the core tube are arranged to provide a streamlined flow path of the insulating material toward the die opening.

Abstract: An apparatus for producing multi-walled thermoplastic tubing having a corrugated wall and a substantially smooth inner wall secured to the corrugated wall, there is incorporated two sets of endless flexible belts each of which is entrained around rotatable end rolls, the outer runs of the belts of one of the sets thereof alternating with the outer runs of the other of the sets thereof, with these outer runs of the various belts serving to urge the inner wall against the corrugations of the corrugated wall while the thermoplastic material of the walls is soft thereby to secure the walls together, and with an electrically energizeable heating coil being provided for softening the thermoplastic material of the corrugated wall to ensure satisfactory securement between the walls.

Abstract: The invention relates to an installation or plant for making sintered brick blanks, which includes a material preparation plant, a press and molding device, a drying and sintering device, a discharge device and feeding means, as well as a central power source, and control and monitoring devices. The material consisting, for example, of clay, loam, clay marl with aluminum oxide and liquid medium, is prepared in the material preparation device and is formed into a strand by means of an extruder in the form molding device. The strand is then cut into brick blanks by means of a strand cutter and a wire cutter. The brick blanks are transferred with suitable transfer means and a displacement device in a defined, spaced-apart relationship, onto a transfer truck and from there onto a drying and sintering truck. A plurality of drying and sintering trucks run in a closed series through a tunnel dryer at an optimum speed for the drying process.

Abstract: An insulation comprising a polyether polyester thermoplastic copolymer obtained by reacting 1,4 butane diol terephthalate with terephthalate esters of polytetramethylene glycol is coated over an irregularly configured conductor, such as for example, a tinsel conductor, suitable for use in telecommunications cordage by moving the copolymer through an extruder and along a flow path formed between a core tube and wall of a die cavity. The die cavity adjacent to the throat of the die has a frustoconical portion formed with an approach angle of sufficient magnitude to minimize the pressure drop through the extruder to extrude the copolymer at a temperature slightly above the melting point of the copolymer.

Abstract: There is disclosed an apparatus for manufacturing a synthetic resin hose having a tubular reinforcing member embedded therein, which comprises a hollow cylindrical member having diameter adjusting discs provided with yarn guide holes for guiding a plurality of bonding-agent applied warps to the outer peripheral surface of the hollow cylindrical member, and an adjusting disc for guiding braiding yarns to the outer peripheral surface of a tubular member formed by said plurality of warps; a braiding machine surrounding said hollow cylindrical member and weaving the braiding yarns into a braided member; a first heating unit surrounding said hollow cylindrical member and bonding the warp tubular member to the braided member at the contacts therebetween, thereby heat-setting a tubular reinforcing member consisting of the warp tubular member and the braided member; a resin applying unit having manifolds and die for coating synthetic resin to the inner and outer peripheral surfaces of said tubular reinforcing member;

Abstract: This invention contemplates an apparatus for affixing to a papermaking felt a plurality of beads comprising means for supporting a papermaking felt having a working surface and means for applying beads of plastic backing, said beads extending away from said working surface and having top portions which are spaced from each other along said working surface to form channels for liquid flow.

Abstract: The present invention relates to apparatus for edging reinforced elastomeric fabric and a preferred method for the operation thereof. One embodiment of apparatus includes a frame, a table for support of the elastomeric fabric, at least one extruder assembly adjacent the table for the application of a suitable elastomeric material directly onto an edge of the elastomeric fabric and means for moving the elastomeric fabric over the table. In an alternate embodiment, the apparatus includes a frame, means for support of the elastomeric fabric and at least one extruder assembly adjacent the means for support for the application of a suitable elastomeric material directly onto an edge of the elastomeric fabric.

Abstract: In a packaging process in which a molten sheet of thermosetting or thermoplastic resin material is extruded and projected from a film forming head and the articles to be packaged are moved along a conveyor underlying the head so as to intercept the projected sheet of resin material and be enveloped and covered thereby, apparatus and method are disclosed for developing a suction or vacuum at a location beneath the conveyed articles substantially underlying the extruded sheet of resin. A pressure differential is created about each article, in which the pressure is substantially reduced about the lower or bottom surface so as to cause the intercepted, molten sheet of resin material to be drawn around the upper portions of the article and sealed about the perimeter of the article's bottom surface. Simultaneously with this wrapping and sealing, excess resin film is trimmed away from the article and collected in a scrap basket disposed in the air stream used in developing the suction effect.

Abstract: A moulding apparatus including a pair of mould cavities with locking spue grooves, means to form moulded rubber article parts in the cavities, means to prework the rubber without substantial curing before it is formed, means to pressurize the mould with gas and means to bring the mould cavities together to join the article parts. The arrangement for pressurizing the mould includes a retractable casing which is movable between a position in which the mould cavities are enclosed to permit their pressurization and a position in which the cavities are accessible outside the casing.

Abstract: A method of manufacturing a reinforced flexible tube in which a hard synthetic resin spiral core is embedded in and fused to a soft synthetic resin matrix through the medium of a semi-hard synthetic resin adhesive layer and the apparatus for carrying out the method of manufacturing the tube. Hard and semi-hard synthetic resin materials are simultaneously extruded from extruders to form a first composite linear element in which these two separate materials are firmly bonded together owing to the small extruding temperature difference between these two separate materials. The first composite linear element is preheated to make the temperature difference between the linear element and a soft synthetic resin material to be extruded on the linear element small.

Abstract: An apparatus is provided for the continuous molding of hardened resin construction members reinforced with fiber material precisely positioned and arranged during the continuous molding process. The reinforcing fiber material in the form of continuous rovings, woven webs, fabric, fleeces, etc. and having a sizing is fed into an elongated hollow molding duct where the material is first compressed and heated to bond the fibers together at their points of contact to form a grid structure. Synthetic resin is injected into the duct intermediate its ends to impregnate the grid structure and be shaped by the molding duct with the reinforcing fibers contained within the resin. The synthetic resin is then hardened by heating as the shaped resin passes further along the duct forming the finished construction or profile member.