Abstract: A clamping apparatus includes a fixed die plate (21) fixed to a frame (26), four tie rods (23), (24) extending in the horizontal direction and respectively fixed to the fixed die plate (21) in parallel to each other, a moving die plate (22) supported to the four tie rods (23), (24) so that the moving die plate (22) can slide freely and a clamping mechanism for moving the moving die plate (22) forward and backward along the four tie rods (23), (24). This clamping apparatus comprises a guide mechanism (25) for downwardly or upwardly supporting the moving die plate (22) and which allows the moving die plate (22) to move in the opposite direction of gravitation.

Abstract: A movable platen 5 which is provided between a base platen and a stationary platen, is connected to a mold clamping ram13 of a mold clamping cylinder 8. A pair of mold clamping cylinders 8 include a cylinder of which the inner diameter of their lower end portions is smaller than the inner diameter of the other portions, the mold clamping ram 13 having a piston 14 which fits to the lower end, a booster ram 16 which is inserted into the mold clamping ram, and a circulation device 20 which is provided to a side portion of the mold clamping cylinder.

Abstract: A sand-blowing apparatus for a molding machine having a sand-storing tank for storing foundry sand disposed so as to be movable vertically and having an opening in an upper part of the sand-storing tank for supplying sand thereto, a nozzle in a bottom part of the sand-storing tank, a chamber in a central part of the sand-storing tank, and an exhaust valve that communicates with the chamber, a compressed air tank for storing compressed air that is movable vertically located above the sand-storing tank, and having an opening in a bottom part of the compressed air tank for blowing compressed air, a device for moving the compressed air tank toward and away from the sand-storing tank, a valve for controlling the opening and closing of the opening in the bottom part of the compressed air tank, a piston rod connected to said valve that passes through an upper part of the compressed air tank, and a device for raising and lowering the piston rod to thereby open and close the valve, wherein when the compressed air tank

Abstract: An apparatus is disclosed for automatically casting separately molded bowl and rim members and then connecting them together while both are in an upside down position. During the connection of the rim to the bowl, the bowl is preferably supported on two opposing sides by the mold. These procedures reduce deformation of the cast bowl while it is still in a “greenware” condition.

Abstract: What is disclosed is a clamping unit for an electrically operable injection molding machine having a drivable spindle whereby a mold backing plate may be moved in the closing direction. On the spindle a nut is guided, the axial movement of which may be transmitted to a mold backing plate. The axial or rotational movement of the nut acts on tilting members capable of being taken into clamping positions wherein the clamping forces acting on the mold backing plate may directly be introduced into the spindle or into a frame of the injection molding machine via the tilting members so as to alleviate the load on the spindle drive.

Abstract: The invention concerns a system for actuating a two-part mould (1) forming two half-moulds (1, 1) mutually articulated about a shaft (2) forming a hinge and driven, between an opening position and a closing position, by a translational carriage (7) driven in a reciprocating movement. The inventive system is particularly characterised in that each half-mould (1, 1) is further articulated on a part (4a, 4b) which pivots about a shaft (5a, 5b) and which is driven in rotation by at least an actuating link rod (6a, 6b) articulated through its ends respectively to said pivoting part (4a, 4b) and to said translational carriage (7).

Abstract: A fixing device for moulds for plastic articles, where a pair of half-moulds (3, 4) in which a force plug (11) can be inserted, comprises at least one tie rod (6) for keeping the two half-moulds in a closed position, the said tie rod being hinged, at one end, to the mobile half-mould and having a second end of a hammer-headed shape which hooks to two gripping jaws (60, 61). The tie rod (6) is hinged to a connecting rod which rotates on a pivot fixed to the resting base (14), which, in the movement of rotation, sets the tie rod (6) along the line corresponding to the centroid of the pressure forces produced during the moulding operation.

Abstract: A mold mounting plate for an injection molding machine for processing material, in particular plastic material, includes a main body having a plate-shaped central portion. Received in the main body are plural sleeves which define openings for support of column-like holding and/or guiding elements of the injection molding machine, and are secured to the central portion such as to establish a flexible bending/torsion joint. In this way, a transmission of moments onto the column-like holding and/or guiding elements as a result of a deformation of the mold mounting plate is minimized.

Abstract: The resin molding machine has a simple molding die, which can be easily maintained, and is capable of molding a work without pretreatments. The resin molding machine for molding the work with resin. The resin molding machine comprises: a press section having a molding die; a cavity plate having a cavity hole, which defines a shape and thickness of a resin mold section of the work; a mechanism for repeatedly carrying the cavity plate into and out from the press section; and a mechanism for positioning the cavity plate onto the molding die.

Abstract: An integral three-dimensional article having interstitials therethrough, the three-dimensional article comprises an unconstrained number of axially successive stages. An apparatus and process for molding such a three-dimensional article are also disclosed. The apparatus has members extending into a mold cavity, each member having access to the periphery of the mold cavity. Each stage may nest within an adjacent stage. The nesting may be accomplished by having the end of one stage be convex, while the mating end of an adjacent stage is complementary and concave. The article may be useful as a static mixer, heat exchanger, etc.

Abstract: A clamping device for an injection blow molding machine incorporates separate clamp movement actuators for joining or separating opposing mold parts and clamping actuators for applying a clamping force to closed mold parts. Opposing locking columns and locking collars are locked together and a clamping force is applied to opposing locked columns and collars. A stroke movement of the locking collars can optionally be provided to allow maximum clamp area clearance for a preform or blow-molded product entering or leaving the clamp area. The distance of stroke movement can be adjusted to accommodate molds of varying sizes.

Abstract: The numbering machine comprises a series of cams (2) and a series of wheels (3), each cam (2) being connected with a wheel (3), so that the turning of a cam (2) signifies the turning of a wheel (3). The cams (2) have on their periphery nine projections (17) and a recess or hollow (18), while each wheel (3) has on its periphery the digits corresponding to the first nine numbers.

Abstract: An apparatus for adjusting die stroke includes a plurality of adjustable helical springs, each of which is equipped with a displacement sensor, a rotation sleeve, and a rotation sleeve driver; a plurality of supporting rods; and a central processing unit. The apparatus is mounted between an oil-pressure cylinder and a top die movable above a bottom die. After the top and the bottom dies are closed to each other, deformation of the adjustable helical springs detected by the displacement sensors and errors measured at different points of molded product released from the dies are sent to the central processing unit for operation. Based on operation results, the central processing unit sends adjusting signals to the rotation sleeve drivers for the same to turn the rotation sleeves and thereby adjusts the helical springs to required modulus of elasticity for use in next cycle of molding process to reduce product errors.

Abstract: A fixed platen and a rear platen of an injection molding machine are connected to each other via tie bars. A coil spring is disposed between the tie bar and the rear platen such that the rear platen is urged in a direction away from the fixed platen. A mold thickness adjusting member such as a nut is also provided for causing the rear platen to move along the tie bar toward the fixed platen against the resilience of the urging means.

Abstract: The invention of this patent is a method and apparatus used in molding applications. An external applied force causes an actuator rod to move in a linear motion. In turn, a rotary linkage rotates about its pivot point. This causes a series of linkage connectors to cause linkage arms to rotate around such linkage arms' pivot point. This rotary action causes platens to move simultaneously together to form a clean, even mold. While the platens move linearly on tie bars, which guide such linear movement, the linkage arms and rotary linkage are mounted on a mounting plate. This allows the clamping and applied force stresses on the platens to be dependent on the mounting plate, rather than the tie bars. The platens travel at the same speed and distance in relation to each other. The result is an evenly produced part that comprises two die or mold halves which are perfectly centered.

Abstract: A molding apparatus includes an upper mold tool having an upper-most mold half, a lower mold tool having a lowermost mold half, and an intermediate mold tool having a first auxiliary mold half cooperating with the uppermost mold half and a second auxiliary mold half cooperating with the lowermost mold half. In a first molding step, the intermediate mold tool is positioned between the upper and lower mold tools to form a first mold cavity between the upper and intermediate mold tools and a second mold cavity between the intermediate and lower mold tools. In this molding step upper and lower material layers are individually pre-molded in the two cavities. In a second molding step, the intermediate mold tool is moved laterally away, and the upper and lower mold tools are moved directly into molding cooperation with each other. Thereby, the separately pre-molded upper and lower material layers are brought together, laminated, bonded, and molded to produce a finished, two-layered molded component.

Abstract: A device for supporting an upper mold tool (7) for movement with respect to a lower mold tool (25). Compared to known devices with simple pivoting supports, in which the space conditions for handling the workpieces with the mold tool opened are very restricted, the upper mold tool (7) is supported on a frame (1) by means of a multi-bar mechanism, such as a four-bar mechanism (10, 11) or a six-bar mechanism to provide a very wide opening of the space between the two mold tools.

Abstract: An injection-molding die, which comprises a movable die platen guided via crossbeams is provided, wherein an adjusting element is positively connected to each crossbeam and can be adjusted axially relative to the crossbeam via a central drive and the position of the die platen changes relative to the crossbeams. An apparatus and method is provided in which at least one of the adjusting elements can be locked against an axial movement and against rotation by means of a fixing device. The fixing device may be a piston element in a closure cover arranged on the movable die platen.

Abstract: A two-plate injection molding machine comprising a movable mold mounting plate and a stationary mold mounting plate and at most three bars passing through the edge region of the mold mounting plates, wherein the closing force is applied to the movable mold mounting plate by pull bars, wherein at least two corner regions of the mold mounting plates have pull bars passing therethrough.

Abstract: An improved apparatus comprising a three plate mold for forming golf ball cores having dual parting lines. The mold comprises top, center and bottom plates, each having at least one mold insert with each insert having a cavity therein. The three cavities collectively form a spherical shape for molding a golf ball core. Upon the cores being formed, the center plate holding the cores, is lifted and rotated to a juxtaposed position against a stripping plate, whereby the cores are mechanically separated from both the mold and overflow flashing.

Abstract: A disc-molding mold includes a first support plate disposed at the stationary side of the mold; a first mirror-surface disc attached to the first support plate; a first guide ring disposed radially outside the first mirror-surface disc and attached to the first support plate; a second support plate disposed at the movable side of the mold; a second mirror-surface disc attached to the second support plate; a second guide ring disposed radially outside the second mirror-surface disc and attached to the second support plate; a guide post attached to either the first or second guide ring and projecting toward the other guide ring; and a guide bushing attached to the other guide ring and adapted to guide the guide post. The first and second guide rings each have a temperature control medium passage formed therein in order to allow passage of a temperature control medium. Thus, the thermal expansion of the first guide ring is made equal to that of the second guide ring.

Abstract: An apparatus for the injection moulding of plastic material, comprising a stationary and a movable mould mounting plate for the parts of the mould which receives the plastic material, separate devices for displacement of the movable mould mounting plate between an open and a closed position of the mould and for producing the closing force for holding the mould parts together, wherein the movable mould mounting plate bears against at least one fixable abutment which is displaceable in the released condition with the mould mounting plate, wherein a single motor serves for displacement of the movable mould mounting plate, for producing the closing force and for fixing or releasing the abutment.

Abstract: A direct type clamping assembly for a motorized injection molding machine to maintain a clamping force for a predetermined time without causing motor stalling is disclosed. A stationary platen and back plate are fixedly attached to a base, and a movable platen is slidingly associated with the base. A housing is disposed in front of the back plate with coil springs disposed between the housing and the back plate. A nut of a ball-screw assembly is rotatably accommodated in the housing with a bearing. When the ball-screw assembly is rotatably driven, the movable platen moves forward, stopping when a mold is completely joined together. The housing can accordingly move backward as the ball-screw assembly is further rotatably driven, compressing the coil springs and generating and maintaining the clamping force. Slight rotation of the motor prevents motor stalling, and the resulting slight movement of the housing scarcely influences the clamping force.

Abstract: A molding process and apparatus which improves on and simplifies the manufacturing apparatus for forming of laminated plastic parts. There is provided a main press having upper and lower mold parts which define a mold cavity corresponding to the laminated part. The upper mold part is movable into an open booking position so as to cooperate with an opposed injection molding tool associated with a partial injection molding press for injection molding of a backing layer therebetween. A thin skin can be formed in the open lower mold half of the main press. A quantity of foamable urethane is deposited in the open lower mold half over the skin. The upper mold half is then moved into closed position with the lower mold half, and the urethane reacts to fill the cavity and join to the opposed backing layer and skin to create the laminated part.

Abstract: This invention provides an apparatus and method for assembling first and second mold parts having contact lens forming surfaces, wherein said first mold part has a reaction mixture on said contact lens forming surface, said apparatus comprising movement preventing means which prevents said first mold part from moving while said second mold part is controllably moved from a first position wherein said second mold part is not in contact with said reaction mixture on said first mold part to a position wherein the majority of said contact lens forming surface of said second mold part has been wetted by said reaction mixture on said first mold part.

Abstract: This invention provides an apparatus and method for assembling first and second mold parts having contact lens forming surfaces, wherein said first mold part has a reaction mixture on said contact lens forming surface, said apparatus comprising movement preventing means which prevents said first mold part from moving while said second mold part is controllably moved from a first position wherein said second mold part is not in contact with said reaction mixture on said first mold part to a position wherein the majority of said contact lens forming surface of said second mold part has been wetted by said reaction mixture on said first mold part.

Abstract: A molding system has a slide displaceable parallel to an axis through a relatively long stroke relative to a stationary overhead extruder head, a center support fixed on the slide, and a pair of end supports displaceable axially through relatively short strokes on the slide between inner and outer end positions. A pair of inner mold halves carried on the center support are directed axially oppositely therefrom toward the end supports. Respective outer mold halves carried on the end supports are axially engageable with the respective inner mold halves in the inner positions of the end supports. An end-support drive connected between the slide and the end supports moves the end supports between their end positions and a slide drive connected to the slide moves the slide axially relative to the head. Each of the end-support drives includes a respective motor mounted on the slide.

Abstract: A method and a mold clamping press for injection molding machines; the press comprises a stationary platen and a movable platen operatively connected to control means which can be operated to relatively move the platens towards and away from each other. Slidable tie-rods, each connected to a respective control cylinder, axially extend between the platens passing through locking bushes rotatably supported by a platen of the press. Each locking bush and the corresponding tie-rod are provided with opposite intermeshing screw threads having an axial clearance; the bushes are made to rotate in synchronism and in a way correlated to the displacement of the movable platen, avoiding any frictional contact between the screw threads during the closing and opening of the mold.

Abstract: A blow-molding machine for producing blow-molded hollow bodies from a thermoplastic material, includes two blow-mold halves which can be horizontally displaced and provided with separate drive units for a transport drive and for the sequence of movements of the mold closing and locking device to open and close the blow mold halves. Conventional blow-molding machines are still equipped with hydraulic drives at least for the mold closing and locking device. In order to provide a blow-molding machine that can for example be operated under clean-room conditions, the drive unit of the blow-molding machine according to the invention is configured for the clamping elements of the mold closing and locking device as an electromotive direct drive with a spindle drive and a spindle mechanism with recirculating rollers.

Abstract: Molding apparatus (200) is provided for simultaneously molding a molding material around a number of separate substrates, each substrate having a semiconductor chip mounted thereon. The apparatus includes a mold holder (113a, 113b, 114, 103) having a first holding section for holding a first mold half (119) and a second holding section for holding a second mold half (120). The first and second holding sections have a common support surface (135), the support surface (135) including a first movable member (104a) in the first holding section and a second movable member (104b) in the second holding section. The first and second movable members (104a, 104b) are movable between a first position in which they protrude out of the support surface (135) and a second position in which the protrusion from the support surface (135) is less than in the first position.

Abstract: The press includes a fixed support holding two or more first half molds set side by side; a mobile support capable of approaching and spreading apart from the fixed support and holding two or more second half molds set side by side; at least one power cylinder interposed between every first half mold and the fixed support, which allows to fine-tune the closing of the molds, thus compensating for any differences in the height of the two molds; and a plurality of devices impeding the reverse motion of the mobile support during the closing of the molds.

Abstract: In a process and apparatus for producing hollow bodies from thermoplastic material by blow molding of preforms using a closing support structure having at least first and second blow molding molds, a common drive means engages a drive plate and a first carrier plate which carries a mold portion. The drive plate is connected to a second carrier plate carrying another mold portion. At least one further carrier plate is arranged displaceably in the opening and closing direction between the first and second carrier plates. At each of its two sides the further carrier plate carries a respective mold portion, each thereof with a mold portion carried by an adjacent carrier plate forming a respective blow molding mold. Each of the two blow molding molds afforded thereby is provided with a means for locking the respective mold in the closed condition thereof.

Abstract: The invention relates to a device for injection molding a plastic object. The device comprises a frame with a first platen and a second platen, which are respectively designed for fixing thereto a first mould half and a second mould half of an injection mould.

Abstract: An injection molding machine has a machine frame, a stationary mold mounting plate and a mold mounting plate which is movable by a closure mechanism which is formed for example by a crank drive or a bell crank mechanism. The movable mold mounting plate and the stationary mold mounting plate are connected without beam members and exclusively by way of the machine frame so that the closing force which occurs during the closing procedure and the driving-open force which occurs during the injection between the mold mounting plates are passed only by way of the machine frame. A mold height adjustment mechanism is included and the closing force is transmitted from the closure mechanism by way of the mold height adjustment mechanism to the movable mold mounting plate.

Abstract: An internal latch for an injection mold that allows opening of the mold at parting lines while selected plates are locked in position and prevented from moving. The system includes an external bushing, an internal bushing that carries cam retainers, and a locking pin. The system may be used in an injection mold having in sequence a stationary plate, a stripper plate and a support plate. The external bushing is secured to the support plate, the internal bushing is secured to the stripper plate, and the locking pin is secured to the stationary plate. The cam retainers selectively engage grooves in the external bushing to lock the stripper plate from moving with respect to the support plate when the locking pin is inserted into the internal bushing beyond the location of the cam retainers. When the locking pin is extracted from the internal bushing, the cam retainers are free to move inwardly thus unlocking the stripper plate from the support plate.

Abstract: The invention relates to an interlock for a column, comprising a piston with a piston rod, such that the piston rod is disposed in a claw bush, the claw bush being disposed in a single- or multi-part plate, such that the piston and the claw bush can move in the single- or multi-part plate. In one embodiment, the claw bush has at least two stages, to apply the force in a distributed manner, the contour of the stages corresponding to the end of the piston rod and/or to the end of the column, the average radius of the first stage differing from the average radius of the second stage.

Abstract: A tire mold opener having an opening lever pivotally mounted on an upper mold half with one end of the lever positioned for engagement with a lower mold half and the other end of the lever connected to a hoist for rotating the opening lever and pushing the lower mold half away from the upper mold half to separate the mold halves and lift the upper mold half away from the lower mold half upon lifting movement of the hoist to separate the tire from the upper mold half and the lower mold half.

Abstract: A mold protection device for an injection molding machine capable of automatically setting a reference value for detecting an abnormal load exerted on a mold in a mold closing process. A load exerted on a servomotor for driving a mold clamping mechanism is estimated by a disturbance estimating observer provided in a control system of the servomotor. The estimated disturbance torque is sampled at every predetermined period in a mold protection region and cyclically stored in a table TA as data DA (0, 0) to (i, j) in mold closing processes of the number (i+1). A predetermined amount is added to an average value of data DA (0, n) to (i, n) to define an upper limit DC(n) for the disturbance torque and stored in the table TC. If the estimated disturbance torque at each sampling period exceeds the upper limit DC(n) of in the mold protection region in a present mold closing process, an alarm is issued to indicate abnormal load.

Abstract: In an injection-molding machine, the rapid traversing over long distances takes place with the aid of linear drives (L1, L2), the “rotor” (H1, H2) which is a component part of the machine construction.

Abstract: The technical field of the invention broadly relates to molding systems, and more particularly to a flexible shoe assembly for use in a molding system. The clamp unit of a molding system includes a moving platen and a stationary platen supported by a frame. Tie bars interconnect the moving platen with the stationary platen. The tie bars are secured to the stationary platen and pass through respective openings in the moving platen. Each tie bar is supported and guided within their respective openings by a flexible shoe assembly and wear pad. The flexible shoe assembly has a force redirector for directing force away from a peripheral edge of the wear pad towards a central force area. The flexible shoe assembly also includes a load distributor to distribute the load across the wear pad surface. The flexible shoe assembly includes an upper support that is flexible about a lower support to keep the wear pad in operational contact with the tie bar.

Abstract: A lollipop comprises a ball of hard candy and an edible stick having a first end extending into a cavity in the ball. The stick comprises pressed candy and a multiplicity of confectionary chips interspersed in the pressed candy. The stick is preferably received into a plastic sleeve to provide a lollipop assembly in which the stick is protected from direct contact while the candy ball is being eaten. In the manufacture of the lollipop, a plurality of book molds are positioned in a line and linked together for simultaneous opening and closing. A plurality of nozzles inject hot syrup into the molds. When the syrup has cooled and the sticks have been anchored therein, the molds are inverted and opened to allow the lollipops to drop out. The manufacture operation is automated and synchronized for maximum efficiency.

Abstract: An injection molding machine comprising a substantially C-shaped machine frame, on the one limb (9) of which is mounted a stationary mold mounting plate (2) and on the other limb of which is mounted a closing mechanism for driving a movable mold mounting plate, wherein the free ends of the limbs of the machine frame, which ends are not connected by beam members, deform under the influence of the closing force which occurs during the closing operation, and wherein at least one of the mold mounting plates (2) and/or an end plate carrying the closing mechanism are respectively supported against the closing force at their upper and lower edges, and the lower support of the mold mounting plate(s) (2) or the end plate (3) respectively is formed by a bending pin (10) which extends transversely with respect to the longitudinal direction of the machine.

Abstract: A molding apparatus is disclosed which includes a first support having spaced apart vertical posts, and a first set of mold halves positioned between the vertical posts. A second support is provided having positioned thereon a second set of mold halves. A clamp bar is positioned on the vertical posts adjacent the second support so as to extend across the mold halves of the second set of mold halves. A grip member secured to the first support is movable between an engage and disengage position, wherein in the engage position a clamp engages the grip member and the clamp bar so as to drive the respective sets of mold halves into sealing contact with each other, so as to form two mold cavities. In the disengage position, the grip member is clear of the clamp so as to permit the clamp to also act as a device to separate the supports when the molding process is over. Methods of using this equipment in an automated rotational molding process are also disclosed.

Abstract: Improved booking drive mechanism for vertically extending mold presses such as SRIM mold presses. Opening and closing of the booking plate relative to its associated moveable ram are actuated by a pair of horizontally disposed hydraulic cylinders. Tension pulleys carried by the extendable pistons of the cylinders are trained around cables that connect the booking plate to the ram. When the pulleys are retracted into their cylinder housings, tension or pull on the cables causes the booking plate to move about a fulcrum to a closed position. Conversely, horizontal extension of the pistons away from the cylinders causes opening pivotal movement of the booking plate about the fulcrum thereby separating the booking plate from the ram.

Abstract: A neck ring arm assembly for a glass container forming machine of the individual section type comprising a horizontally extending invert shaft and a vertically extending cylinder with a rack that engages a spur gear attached to the invert shaft to oscillate the invert shaft. In a first embodiment, the invert shaft has an inner annular sleeve keyed to it, and the inner annular sleeve has a polygonal exterior, preferably a hexagonal exterior. First and second outer annular sleeves surround the inner annular sleeve to be oscillatable therewith, but reciprocable with respect thereto.

Abstract: A molding apparatus includes a core (3) and a female mold member (4) as well as wraparound peripheral dies (7), which are attached to the core for movement in a closing direction and completely surround the core (3). In the region of the impact areas of the peripheral dies (7) upon the female mold member (4), the impacting surfaces are configured complementary, for example planar. Each peripheral die (7) is attached laterally to the core by at least one spacer and retaining element (8, 10), with the spacer element (8) having a width which is slightly greater than a cross section of the peripheral die, so that a small gap (9) is formed between confronting surfaces of the peripheral dies and the core. The fixed tolerance gap offers the advantage that constant, minimum frictional conditions exist. The lateral attachment facilitates the replacement of individual peripheral dies (7) and temperature-based dimensional changes of the core (3) are followed by the peripheral dies, without risk of jamming.

Abstract: An injection molding apparatus for producing formed or molded millwork products includes a workstation supported on a support surface, a lower composite mold/press unit mounted upon the workstation and defining a lower portion of a mold cavity, and upper composite mold/press unit defining an upper portion of the mold cavity, and support members spaced apart from one another along the lower composite unit, movably mounted to the workstation, and extending above the lower composite unit where the support members mount the upper composite unit generally above and for movement toward and away from the lower composite unit. Either of the lower and upper mold/press units can have replaceable plates for different shaped products. The apparatus also includes actuators for the support members and releasable locking mechanisms for the upper composite unit.

Abstract: A machine for producing parts of foamed plastic material, wherein a gantry-type frame supports a fixed half-mold, and a carriage from which is suspended a movable half-mold and which is movable along the frame to impart to the movable half-mold an approach movement towards, and a parting movement from, the fixed half-mold; the movable half-mold being locked to the fixed half-mold, in a position closing a mold for injecting foamed plastic material, by a number of electromagnets interposed between the two half-molds.

Abstract: A compression molding system has a pair of mold part holders with corner assemblies that perform guidance, stop and stabilization functions. Interchangeable heated mold parts lacking the aforesaid functions, are removably attached to the respective holders in such a manner that sheet metal core and cavity components of the mold parts are properly aligned. The guidance function of the holders guides the movement of the mold parts toward one another, and the stop function limits such movement to provide a predetermined space between the sheet metal components in order to form compression molding material therebetween to a desired shape and thickness. The stabilization function prevents longitudinal and transverse expansion of one of the mold parts relative to the other. The holders are designed to be attached to platens of a press.