Abstract: The present invention relates to a process of paste extruding lubricated PTFE fine powder in an extrusion device by forcing the lubricated PTFE fine powder through the extrusion device and out of an orifice as a lubricated green extrudate, wherein before exiting through the orifice, the direction of the flow of the lubricated PTFE fine powder in the extrusion device is reoriented in a direction at least 60 degrees different from the initial direction of the flow of the lubricated PTFE fine powder through the extrusion device.

Abstract: Apparatus for the expansion and/or heat treatment of oleo resinous material of the type which includes a tubular housing having a rotatably driven screw for conveying material to be treated towards the outlet end of the tubular housing. An outlet discharge device is adjacent the outlet end of the housing for providing for the discharge of the material from the outlet end. The outlet discharge device includes a main ring attached to the housing at the outlet end. The head in the preferred embodiment has a plurality of teeth and depressions around the periphery of the head and the main ring also has a plurality of matching teeth and depressions in the inner circumference thereof. Alternatively, the peripheral face of the head and the inner circumference of main ring may be without depressions and teeth, but instead may respectively be in the form of a continuous face.

Abstract: Apparatus for extruding an elongated article comprising a die having an opening therethrough; an extruder for discharging extrudable material through said die opening; structure for rotational movement between said die and said extruder so as to provide said elongated article having a rotational profile.

Abstract: The accumulator of an extrusion blow molding machine is constructed to include a stroke positioner that comprises inter-engaging, threaded components that enable the piston of the programming cylinder to be adjusted relative to the inner rod of the programming system in the accumulator assembly. Since the inner rod ultimately connects to the die pin, this adjustment directly determines the position at which the piston in the programming cylinder will close off the die gap. In particular, the components of the programming system can be adjusted so that the die gap is closed just as the piston of the programming cylinder reaches the limit of its stroke.

Abstract: A diverter element is constructed of a generally cylindrical shape for insertion in an open cylindrical bore. A balanced flow passage is formed by the cooperation of grooves constructed on the outer surface of the diverter and the inner surface of the bore. A distribution groove is constructed in the diverter extending circumferentially about the diverter surface. First and second pairs of diverging grooves are constructed downstream of the distribution groove. The diverging grooves are separated by a dam which is shaped to restrict flow at the point of divergence of the grooves to encourage the plastic flow to divide and fill the diverging grooves while allowing reduced flow over the dam.

Abstract: A flow control device is mounted within a channel of an extrusion die, wherein the channel is defined by a base surface and a side surface normal to the base surface. The device includes a main body and an auxiliary body, wherein the main body includes a side portion that sealingly contacts the side surface of the channel when a force is exerted on the side portion, and the auxiliary body is in contact with the base surface of the channel. The device further includes a flexible membrane on a face opposite the auxiliary body which can influence the flow of material through the channel by moving in a direction perpendicular to the direction of material flow. A sealing apparatus is used to prevent leakage of material between the die and the flexible membrane. The sealing apparatus includes a gasket disposed adjacent an end surface of the membrane and means for causing the gasket to apply a force against the end surface such that the gasket seals against the membrane.

Abstract: A film extruder employing an internal deckle system including a pair of rectangular metal bars disposed in the pre-land area of the die one above the other with the opposing edges of each bar having a tapered surface. The tapered surfaces cause the bars to increase or decrease the total with of the flag when one of the bars is moved and to provide sufficient sealing pressure to effectively seal off the pre-land area. Preferable, the tapered wedge flags are disposed below the usual plug at each end of the extruder and apply sealing pressure against a deckle rod adjustably placed below the tapered wedge bars.

Abstract: In heavy extrusion equipment where alignment with downstream equipment is necessary, adjusters 34 are provided for adjusting the position of the extrusion die (14) with respect to the extruder (12). In practice it is possible to provide a die with a split housing one part of which is adjustable with respect to the other, one of the die parts (14) being fixedly connected to the extruder (12), or by providing a two part die, the parts of which are adjustable with respect to each other. The invention may be utilized for alignment of an extrusion die with downstream equipment such as tooling, tooling dies, sizing tables, etc. and also in corrugations for single and double walled pipe.

Abstract: The invention relates to a cross discharge head for extrusion equipment comprising a housing to be mounted on an extruder, which in its interior receives an annular feeding channel encompassing a passage, disposed in the housing and disposed at an angle to the direction of extrusion of the extruder, for the supply of a product to be ensheathed with the extrudate, which receives in its interior a distributor piece, and which at the exit is provided with annular outer shaping tools tapering the stream of extrudate, which are secured on the front face of the housing so as to be exchangeable, wherein the passage at the end side is encompassed by a conical guidance nipple whose outside is simultaneously also the inner shaping tool.

Abstract: An extrusion head for a blow-molding apparatus has an annular and relatively rigid outer housing centered on a housing axis, a rigid ring axially fixed in the housing and shiftable radially of the housing axis in the housing, and a sleeve generally coaxially received in the housing and having an upstream end secured to the ring and a downstream end radially elastically deflectable transversely of the housing axis relative to the upstream end. A rigid core coaxially received within the sleeve in the housing has an outer surface defining an annular passage with an inner surface of the sleeve.

Abstract: A thermal actuator system controls the position of a moveable die lip (32, 34) on a flat film extruder die (30) to control the gauge of the extruded plastic film, and includes thermal actuators each of which has an outer thermal bolt (70) and an inner bolt (80) extending through the outer bolt. The inner and outer bolts have outer ends which are connected together, while the outer bolt is connected to the die body and the inner bolt has an operative end connected to a die lip. An air passage (90) is formed between the inner and outer bolts and through which air is applied for cooling the inner bolt with respect to the outer bolt. Thermal expansion of the outer bolt is controlled by an external heater (75) mounted on the outer bolt.

Abstract: An extrusion apparatus including a flexible lip for adjusting the lip gap, and including reciprocally movable members in operative contact with the flexible lip is described. Beneficially, a generally laterally movable actuator bar is connected to angled slots of the reciprocally movable members by pin members rotatably mounted in bores of the actuator bar. Lateral movement of the actuator bar advantageously results in lip gap control across the full width of the lip gap. Use of reciprocally movable members with slots of selected angles provides for profiling the lip gap. Also provided is an advantageous mechanism for controlling movement of the actuator bar and reciprocally movable members.

Abstract: A method of producing an inflation film which includes the steps of melting an ultra-high-molecular-weight polyolefin in an extruder, extruding the molten polyolefin from a screw die, and blowing a gas into a molten tubular film formed by extrusion. An apparatus for producing an inflation film which includes an extruder provided with a first screw, and a screw die having an L/D of at least 5 and is provided at the end of the extruder, wherein the screw die includes a second screw which rotates independently of the first screw, a mandrel coupled to the end of the second screw and rotates together with the second screw, an outer tube die in which the mandrel is inserted, and a gas passage extending in the second screw and in the mandrel. An inflation film is composed of an ultra-high-molecular-weight polyolefin having a tensile strength at break of greater than 1660 kg/cm.sup.2 in a machine direction and greater than 1600 kg/cm.sup.2 in a transverse direction, an impact strength of greater than 9500 kg.

Abstract: A method, process and apparatus for generating complex shapes without the use of dies, molds, or other fixed tooling. A continuous length or flow of a malleable or fluent material is provided to a forming apparatus which shapes the material, producing a contiguous series of smoothly blended, properly contoured portions of the desired shape. The formation of a shape relies on continuous control of shape-determining variables: the instantaneous cross-section of the shape in a virtual transition surface between the formable and formed material, the rate-of-change of cross-sectional dimensions between sequential cross-sections, the instantaneous angle of movement of the material at any point on the cross-section in the transition surface, and the rate of movement away from the transition surface of the just-stabilized portion of the shape. The material is stabilized as these shape-determining variables achieve the proper values in each portion of the material.

Abstract: A paste extruder includes a machine frame; an extrusion barrel seated in the machine frame and having an open end; an extrusion die connected to the open end of the extrusion barrel; and a mandrel rod which is arranged coaxially inside of the extrusion barrel, which has a mandrel tip, and which cooperates with the extrusion die, wherein the mandrel rod is comprised of a mandrel rod tube and an inner mandrel having a portion positioned proximate to the extrusion die which projects from the mandrel rod tube and having a portion arranged inside of the mandrel rod tube which has a first section arranged at a radial distance from the mandrel rod tube, and which has a second section rigidly connected with the mandrel rod tube, and wherein the first section has an elastic element which acts transversely to one of the axial direction or the direction of extrusion.

Abstract: By using a variable section extrusion die set which includes a die set (24) displaceable in a first direction orthogonal to an extrusion direction of a molding material and in a second direction perpendicular the first direction and adapted to vary an area of an extrusion molding hole (31) through which the molding material is extruded, and a mandrel (27) reciprocally movable in and out of said extrusion molding hole in the extrusion direction and provided on an outer peripheral portion thereof with a tapered portion (27B) which is gradually reduced in outer configurational dimension from one direction of the reciprocally moving direction to the other, said die set being moved to deform the extrusion molding hole (31) while pressing the molding material against said die set (24), and the tapered portion of the mandrel (27) being reciprocally moved in and out of the extrusion molding hole, extrusion molding of a tubular molding is thereby accomplished which varies in outer configurational dimension and inner c

Abstract: A cream depositing machine including a rotatable stencil drum (2) having first and second stencil ports (3, 4), a device (5) for rotating the drum (2), a first and second cream supply device (12, 13) for supplying first and second cream material separately to the ports (3, 4), a cream control device (10, 16) within the drum (2) and operable, in time sequence, to initially cause the first cream material to issue from the first stencil port (3) and thereafter, after angular movement of the drum (2), to cause the second cream material to issue from the second stencil port (4) whereby deposits of the first and second cream material co-exist on the drum (2), and a device (15) for simultaneously removing the co-existing deposits.

Abstract: In a method of and a device for producing shaped parts, a pressing piston is longitudinally displaceable in a tube provided with a pressing mold so that in a first pressing stroke it slightly compresses a mixture of cuttings and/or fiber material with a binder, and in a second stroke it finally compresses the mixture.

Abstract: Paste extrusion of lubricated PTFE fine powder is carried out by using the extrusion head of the extruder as the ram for forcing the powder through the extrusion orifice in the extrusion head, i.e. the extrusion head is moved against the powder, whether in particle form or preform form, to cause the extrusion.

Abstract: An extrusion apparatus includes first and second die body portions each having a main body and a lip interconnected with the main body wherein the die body portions are joined such that a single die outlet is formed between and bounded by the lips. The apparatus also includes suitable structure for moving the lips to adjust the die outlet.

Abstract: A die is formed with an opening having substantially the same shape as a fundamental cross-sectional shape of an extrusion member. A first core is formed with a projecting portion projecting forward beyond a front surface of the die. A movable die for changing the external shape of a sealing portion is disposed on the front surface of the die. The movable die is allowed to move between a position where a curved surface formed at the forward end thereof is kept away from the projecting portion of the first core and another position where the curved surface comes close to the projecting portion. Further, first and second movable cores are inserted in the opening of the die, these movable cores being moved forward and backward along the direction in which EPDM is extruded.

Abstract: Aa apparatus for manufacturing profile extrusion molded articles having a gradually transforming portion at which its cross section gradually changes includes a stationary die block having an aperture in a shape of the maximum cross section of the gradually transforming portion and a resin passage in communication with the aperture, an extruder extruding resin material of a gradually changing amount to an inlet of the resin passage, and flow direction controlling means for changing a flow direction of the resin material flowing within the resin passage in accordance with the extruding amount of the resin material. The manufacturing apparatus can produce profile extrusion molded articles without any bypass passage, avoid the resin material to be discharged outside the stationary die block, and prevent unsightly lines tracing a shutter movement from appearing on the design surface of the extrusion molded articles.

Abstract: An extruded "Y" or bifurcated tube having unitary construction and an extrusion apparatus therefor. The "Y" tube includes three separate tubes, each tube having a central lumen, and a transition portion integral with the tubes and providing physical connection and fluid communication between the individual lumens of the three separate tubes. The first of the three tubes has a first lumen and is first formed by extrusion through a convention extruding die. The extruder die then gradually bifurcates the first tube, providing a gradual transition between the first tube and the second and third tubes. The lumens in the second and third tubes thus formed remain in uninterrupted fluid communication with the lumen of the first tube. The bifurcation takes place with the first tube to form second and third tubes smoothly and over a transition distance which is easily controlled by the extruder die. The bifurcated second and third tubes are continuous with the first tube making the "Y" tube unitary.

Abstract: A rapid prototyping system makes three-dimensional objects by sequentially depositing multiple layers of solidifying material on a flexible sheet substrate. The substrate is held against the top surface of a vacuum platen during deposition of the layers. When the object is completed, the substrate is released from the vacuum platen. By flexing the substrate, the object is peeled away from the substrate.

Abstract: An elastomeric extruding apparatus having a head, to which a plurality of extruders are coupled, and a rotatable, driven roller disposed at the front end of the head so as to form an extruding space between the roller and the head. The head is provided with a passage arrangement, through which the elastomeric materials pass, eventually opening into the extruding space. The extruding space has a uniform chamber extending from the opening of the passage arrangement and a finishing chamber communicating with the uniform chamber for shaping the elastomer into its final sectional shape.

Abstract: The present invention provides a die for molding a honeycomb structure, which can be molded without causing bending on a cell grid and which can readily cope with changes of shrinkage percentage of the product. The invention also provides a honeycomb structure, which has no bending on the cell grid and has high strength. The die according to the present invention includes a metal die 1, having a feed hole forming unit 14 provided with feed holes 15 and a slot forming unit 11 provided with slots 12, and a guide ring 2, which has an abutment surface 25 placed face-to-face to a part of the metal die 1 via a clearance sector 22. The slot forming unit includes an outer peripheral slot forming unit 130 and a main-body slot forming unit 160, and there is provided a protruded surface 17 protruded in extruding direction between a main body end surface 16 and an outer peripheral end surface 13.

Abstract: An apparatus for manufacturing a rod of hard metal or ceramic with at least one helical inner bore. A plasticized mass of hard metal or ceramic is simultaneously forced through a die and twisted. Either the mass is twisted uniformly over the cross-section of the billet by a spinner immersed in the mass or the spinner is rotated by the mass. The mass emerges either subject to torsion or entirely or mostly without torsion from a smooth downstream channel through the die. A filament-shaped material extends or is injected into the mass to produce the inner bore or bores.

Abstract: An improved method is provided for extruding ePTFE tube (12) for use in medical applications. A tube (12) of PTFE is extruded, preferably in an extrusion process, using counter-rotated die components (22, 26). The die component (16) is maintained at a constant temperature during processing. The resulting green tube (12) has enhanced fibrous state formation in a direction perpendicular to the direction of extrusion. The PTFE green tube (12) is then subjected to secondary operations such as stretching and expansion to yield medical product. The ePTFE tube (12) structure is defined by nodes interconnected by elongate fibrils. Both the nodes and fibrils are substantially randomly tilted with respect to the longitudinal axis of the tube (12). This particular structure yields a tube (12) which exhibits a high degree of radial tear strength useful in medical applications.

Abstract: An electric drive for controlling the die gap in a continuous blow molding head and the die gap and pushout in an accumulator blow molding head. The electric drive includes a programming screw for attachment to a programming rod for setting the die gap, a programming nut and an electric motor for rotating the programming nut. In an accumulator blow molding head, the electric drive further includes a shooting screw for attachment to a shooting rod for controlling pushout, a shooting nut and an electric motor for rotating the shooting nut. The programming screw and the shooting screw are coaxial with the programming rod passing through the shooting screw.

Abstract: Large, multi-layer parisons with an inner layer, an intermediate layer, and an outer layer for use in intermittent extrusion blow molding are formed using a die head including a housing, an annular inner conduit having a first resin inlet with a horizontal axis, an intermediate conduit having a second resin inlet with a horizontal axis, and an annular outer conduit having a third resin inlet with a horizontal axis, a closable, tubular extrusion orifice in communication with the inner, intermediate and outer conduits, the first inlet being in a plane above the second inlet and the second inlet being in a plane above the third inlet; and first, second and third reciprocating screw extruders, each extruder including a cylinder with a resin inlet and a resin discharge outlet, a screw rotatable within the cylinder to convey the resin from the resin inlet to the discharge outlet, the screw being axially movable away from the outlet when the screw is rotating, and drive means for moving the screw rapidly toward the

Abstract: An apparatus for producing an automobile windshield molding for sealing a space between a windshield and a periphery of a window opening of a vehicle body panel utilizes cooperating dies. The windshield molding comprises a pair of extruded side molding parts, a pair of extruded corner molding parts, and an extruded upper molding part integral with and extending between the side and corner molding parts. Each of the side molding parts associated with each side edge of the windshield is larger in thickness compared to the upper and corner molding parts, where a water drain channel is formed.

Abstract: A braiding extruder for making braided products from extrusible material. The braiding extruder includes a first rotatable member, a second rotatable member, a rotatable member driving system, and an orifice blocking arrangement. The rotatable members each include a pair of orifices for extruding a strands of extrusible material therethrough. The orifices are fluidly coupled to a source of pressurized extrusible material. The driving system rotates the first rotatable member clockwise about a first axis of rotation, and rotates the second rotatable member counter-clockwise about a second axis of rotation, parallel to the first axis of rotation. The orifice blocking arrangement selectively permits and prevents the extrusion of the extrusible material from the orifices. The orifices, the driving system, and the orifice blocking arrangement extrude and braid at least three strands of extrusible material.

Abstract: The accumulator of an extrusion blow molding machine is constructed so that the programming cylinder and die adjustment rod have axially aligned bores to receive a die pin retaining rod. The retaining rod holds the die pin in place by means of a lower split ring that nests inside the die pin and a lock nut combined with an upper split ring associated with the programming cylinder. When the lock nut is loosened and the upper split ring is removed, the retaining rod is moved down (while the die pin is held in place) and the lower split ring is removed. The die pin is then free to slide off the retaining rod and be removed from the accumulator head.

Abstract: The invention relates to an adjustable throttle with which to influence the mass flow within a rectangular flow channel or a flat flow channel with rounded marginal areas. Because of its special design, the throttle has no parting plane perpendicular to the fluid flow direction. The channel height may be modified by this throttle, so that the fluid mass flow may be influenced by changing the local flow channel resistance as a function of its width without creating discontinuities in the flow channel. Because of this continuous change in the geometry of the flow channel, both in the direction of its width and in the flow direction, the whole flow channel is totally free from dead spots.

Abstract: A rod 3 is driven forward to open an annular slit 5 between a die 2 and a mandrel 4 and the molten resin in a resin accumulation chamber 10 is expelled from annular slit 5 to form a parison. In this operation, the die 2 is displaced from an original position adjoining to the mandrel 4 (axially aligned position) upon opening of the annular slit 5 to correct for any variation in thickness of parison P to be extruded from the annular slit 5. Then, the molten resin accumulated in accumulation chamber 10 is expelled from annular slit 5 to form parison P. The die 2 is then reset to the original position to bring the die 2 and mandrel 4 into axial alignment. Therefore, as the rod 3 is driven back, the annular slit 5 can be closed tight by the mandrel 4 to prevent resin leakage. After closure of the annular slit 5, molten resin is accumulated again in the accumulation chamber 10 and the annular slit 5 is opened. This procedure is repeated to produce parisons on an intermittent basis.

Abstract: An extruder for extrusion manufacturing a rod of hard metal or ceramic with at least one helical inner bore. A plasticized mass of hard metal or ceramic is simultaneously forced through a die and twisted. Either the mass is twisted uniformly over the cross-section of the billet by a spinner immersed in the mass or the spinner is rotated by the mass. The mass emerges either subject to torsion or entirely or mostly without torsion from a smooth downstream channel through the die. A filament-shaped material extends or is injected into the mass to produce the inner bore or bores.

Abstract: A parison extrusion head includes a cylindrical body, a programing rod in the body, a die pin on the end of the rod, and a die ring mounted on the end of the body by a clamp assembly having a pair of clamp arms which are connected to the body by hinges and are rotated between a closed position holding the die ring on the body an open position permitting free removal of the die ring. The clamp arms carry bolts used to move the die ring laterally and adjust the thickness of the extruded parison.

Abstract: In a method of manufacturing moldings and an apparatus therefore, a ridge piece 20 protrudes from a molding main body 10 of a molding 1 in a lip manner is removed gradually from a leading end side to a root side by a lip removing piece 33 moving together with a second die 32 which changes the extrusion contour of the molding main body 10, then the ridge piece 20 is removed by the movement of the second die 32 without decreasing the thickness of the ridge piece 20 thinning. Accordingly, the ridge piece 20 can be removed effectively by the simple operation and apparatus without requiring the operation such as the after-treatment, which can result in the improvements of the productivity of the molding 1, the appearance of the molding 1, and the reliability.

Abstract: A modular tubular cellulosic casing die that includes interchangeable parts, and adjustable die openings having an inner lip that can be centered and vertically adjusted relative to the die's outer lip.

Abstract: An extrusion die for foam sheet including a die body defining a manifold for conducting a split stream of heated and pressurized foamable thermoplastic melt through separate distribution channels to a die terminus. A pair of mating die lips are arranged on opposed sides of the melt and are constructed to adjustably slide toward and away from each other to vary the flow of a melt. The lips are each mounted to slide along an axis which is tilted rearwardly at an acute angle relative to an orthogonal to the sheet being formed. The mandrel is configured and adapted for quick withdrawal and replacement from an end of the die through a passageway extending through the die transverse to the direction of extrusion of a sheet.

Abstract: A mechanism for making granulated material from a viscous substance includes a vessel charged with the substance and having a discharge arrangement such as a slit through which the substance can flow onto a cooling surface. A belt disposed above the cooling surface is passed across the slit of the vessel. The belt has openings arranged to periodically come into alignment with the slit to allow the substance to flow therethrough. The belt is a thin metal belt strengthened by sleeves projecting from respective ones of the openings in a direction away from the vessel.

Abstract: A die assembly fitted to the outlet of an extruder includes a die head for discharging thermoplastics melted in the extruder. The die head (7) is mounted longitudinally displaceably, transversely with respect to the polymer flow, in a rail guide of an intermediate plate (4) arranged between outlet of the extruder and die head (7) and can be removed from the intermediate plate (4) by longitudinal displacing. The die head (7) is supported on the intermediate plate (4) by sealing surfaces (8, 11), against which the die head (7) can be pressed by a screw coupling (10), the loosening of which makes possible the longitudinal displaceability of the die head (7).

Abstract: The invention comprises a plasticating machine for the working and forcing of plastic material into a mold, said machine including an elongated housing having a first or proximal end and a second or distal end, an elongated screw shaft with a screw flight therearound, the screw shaft being rotatably supported in the elongated housing, for the working of plastic between the screw shaft and the elongated housing with at least one delivery conduit generally longitudinally arranged through the screw shaft, from a proximal end to a distal tip end thereof. The conduit may be arranged to be movable with respect to the screw shaft to permit delivery of a medium through the screw shaft to any plastic being driven from the machine. The medium may be any single or combination of components selected from the group comprising vapor, liquid, gas, powder or solid, to control the machine or treat any plastic being driven therefrom.

Abstract: An extrusion apparatus having an internal deckle system, includes a deckle blade that extends through an end of the apparatus into a flow passageway. The apparatus may beneficially include a cold-formable, sealing member for preventing leakage through the apparatus end. In a variation, the apparatus may include an upstream deckle plug that includes a sealing member formable under heat and compression to prevent leakage transversely past the upper deckle plug. In a further variation, a full width, upper deckle plug may extend through an end of the main body into the manifold. A wavy or scalloped edge may be avoided by an extended portion that extends downwardly and terminates at or near the exit orifice.

Abstract: A die head for extruding an annular body includes a mandrel having a warp portion with a number of segments spaced around the circumference of the mandrel. Heat is selectively flowed to the segments to warp the mandrel and vary the position of a die pin on the end of the mandrel in a die bushing to control the thickness of the extruded body.

Abstract: A method of forming a windshield molding which drains rainwater smoothly through the rainwater groove provided at necessary sections and having different depth in the longitudinal direction for better drainage and which can be produced simply and continuously as a single molding without the addition of cutting or other processes.

Abstract: A spiral die for forming a laminate includes an outer die ring, an inner die ring inserted into the outer die ring with a fit clearance therebetween, a plurality (m, a positive integer greater than 1) of spiral grooves each having a gradually decreasing depth disposed between the outer and inner die rings, and distribution paths for distributively introducing melted resin streams of a plurality (n, a positive integer satisfying n<m) of resin species in a prescribed order into said plurality (m) of spiral grooves. The individual resin streams distributed to the spiral grooves proceed along the spiral grooves to gradually overflow the respective spiral grooves and overlie each other in a prescribed order before the individual resin streams form a uniform tubular stream in a die axial direction.

Abstract: An extrusion die for the extrusion of continuous hollow sections of plastic materials reinforced with fibers or molecules. Both the outer nozzle and inner mandrel are rotatable and have channels within them to allow the extrudate to flow through either the body of the nozzle or of the mandrel into the space between them to impart a radial component to the fibers. Likewise, a helical channel formed in either the nozzle or mandrel imparts a tangential component to the fibers. The flow may also be straight through the die which gives the fibers an axial component.

Abstract: An accumulator head for a blow molding machine uses an electromechanical drive assembly for the purging and programming functions. The purging actuator of the drive assembly includes a ball screw and nut assembly in which the ball screw is rotated by an electric motor to move the ball nut assembly vertically and operate the plunger of the accumulator. A second ball screw and nut assembly is included in the programming actuator of the drive assembly for moving the mandrel vertically, thereby controlling the size of the die outlet opening of the accumulator. Preferably, the ball screws of the programming and purging actuators are axially aligned with the nut assemblies each carried by a yoke that travels on guide rods. Four support rods are provided to maintain alignment and provide stationary mounting for the respective motors. The structure has sufficient rigidity to supply the force required for the purging operation, but uses no hydraulic actuators.

Abstract: An accumulator head for a blow molding machine uses an electromechanical drive assembly for the purging and programming functions. The purging actuator of the drive assembly includes a ball screw and nut assembly in which the ball screw is rotated by an electric motor to move the ball nut assembly vertically and operate the plunger of the accumulator. A second ball screw and nut assembly is included in the programming actuator of the drive assembly for moving the mandrel vertically, thereby controlling the size of the die outlet opening of the accumulator. Preferably, the ball screws of the programming and purging actuators are axially aligned with the nut assemblies each carried by a yoke that travels on guide rods. Four support rods are provided to maintain alignment and provide stationary mounting for the respective motors. The structure has sufficient rigidity to supply the force required for the purging operation, but uses no hydraulic actuators.