Abstract: An extruder system includes a barrel surrounded by a jacket defining a plurality of zones. Other zones may be in the feed screw and downstream processes. A temperature control unit has a hot water circuit and a cold water circuit each with supply and return manifolds and valves which allow connection of each of the zones to receive either hot or cold water. Each circuit has a single heat exchanger which is used to heat or cool all the water circulating in the respective circuit. The two circuits may be interconnected by a heat pump so that waste heat from the cooling circuit is used by the heating circuit. In this case the heat exchangers become auxiliary. The system permits optimum energy reuse from heated areas to cooled areas, or vice versa, and minimizes additional energy requirements.

Abstract: A heating apparatus for thermally shrinkable tubes and the like has a heating density gradient such that a higher temperature is imparted initially to a central portion of the heated tube, spreading gradually to the ends of the tube, to purge air bubbles to the outside of the tube while employing only one heating element.

Abstract: A method and apparatus for internal cooling of extruded tube-shaped objects wherein liquid nitrogen is inserted into the tube and evaporated there out of contact with the tube on account of the heat from the tube whereafter only evaporated nitrogen is made to pass through the inner surfaces of the extruded tube. The apparatus for evaporation of the liquid nitrogen and for conduction of the gasified nitrogen comprises a cylinder-shaped member with good thermal conductivity placed in the shaped tube adjacent to the extruder nozzle. Provided in the closed end of the cylindrical member are nozzle members with a connection to a supply line for liquid nitrogen inserted through the extruder nozzle. Provided in the opposite end of the cylindrical member are openings for passage of the evaporated nitrogen out towards the shaped tube.

Abstract: A five roll calendar apparatus includes five rolls mounted in a common horizontal plane, including three heated rolls with first and second covered rolls. Each heated roll includes an inner rigid core having an outer finished surface. A plurality of grooves are formed by machining the face of the core and a thin sleeve is shrunk fit onto the core to seal the grooves and establish heat transfer passageways. The size of the passageways, the separating lands and the shell thickness are such that the temperature at the surface of the roll is essentially constant over the portions of the cavity and the adjacent core body. The thin outer wall establishes a short time response for correcting the temperature of the web. The center roll is rotatably fixed and the other rolls are individually loaded toward the fixed roll for controlling of nip pressure. The covered rolls are mounted in suitable slide supports. The end rolls are mounted to a torque shaft which provides a high degree of squareness to the roll loading.

Abstract: In a method for controlling a tire vulcanization of a vulcanizing apparatus, an initial green tire temperature is measured before vulcanization and a tire temperature during vulcanization is estimated on the basis of the thus measured initial tire temperature. In addition, a sum of products of vulcanizing rates derived from the thus estimated tire temperature is calculated so as to stop the tire vulcanization when the sum of products of vulcanizing rates becomes equal to a predetermined value. Therefore, the vulcanizing rate controlling can be performed in an easy and accurate manner without measuring the tire temperature during vulcanization, and thus a trace of a thermometer insertion is not remained on the vulcanized tire surface.

Abstract: An automated system for controlling the curing process of structures formed of fiber-reinforced composite material and the like in an autoclave is disclosed. The system uses sensors to monitor autoclave pressure, ambient and structure surface temperature, and structure viscosity during the cure cycle. Real time measurements are taken for each of these parameters, and the measured values are compared with predetermined optimum values which themselves change as the curing cycle progresses. The results of the comparisons are used to control the application of temperature and pressure in the autoclave to achieve the desired visco-elastic states of the structure which continually change as the curing process progresses. The viscosity data are obtained through measurements of attenuation of an ultrasonic wave in the composite material of the structure. It was found that the attenuation is directly related to the viscosity of the structure.

Abstract: In the construction of hot channel nozzles (21) very precise temperature control over the length of a nozzle channel is desirable. To achieve this, a nozzle tube (32) for accommodating the plastic melt is constructed as an electrical resistance heater over its entire length, i.e. up to the nozzle bore (33), and can accordingly be heated. The nozzle tube (32) has differing, namely adapted, heating power over its length as a result of appropriate construction over its length, so that a substantially uniform temperature of the plastic melt is achieved.

Abstract: The temperature of upper and lower parts of a forming tool making deep-drawn thermoplastic articles is controlled with a system which performs the steps of passing a coolant of predetermined total volume through the upper part and the lower part of the forming tool; measuring the temperature of the upper and lower parts; determining the actual temperature difference between the upper and lower parts; comparing the actual temperature difference with a predetermined desired temperature difference; generating a signal representing the magnitude of deviation between the actual and desired temperature differences; and, as a function of the signal, increasing the volume of coolant passing through one of the forming tool parts and decreasing the volume of coolant passing through the other of the forming tool parts for reducing the magnitude of deviation while maintaining the total volume unchanged.

Abstract: A web manufacturing apparatus including a flexible shaping member that engages fluid material of which a web is formed, a support that extends parallel to the shaping member and a plurality of thermal expansion rods that extend between the shaping member and the support so that the shaping member can be flexed to control the web thickness profile by means of heaters on the thermal expansion rod. Each thermal expansion rod is fixed to the shaping member and is secured to the support via a differential screw mechanism that includes a driven screw and an adjusting screw positioned in tandem in a threaded bore through the support and are coupled so that the driven screw can be turned by turning the adjusting screw. The driven and adjusting screws have internally threaded bores and one end of the thermal expansion rod screws into the bore of the driven screw.

Abstract: An attachment for use with a household blender to convert the blender to a cotton candy making machine is the subject of the present invention. An open top container is provided with a rotatable hopper for receiving the candy making ingredients including sugar. A heating element proximate to the hopper melts the sugar. A drive shaft is coupled with the hopper and is adapted to be coupled with the drive coupling on the blender motor. Thus, when the blender is turned on, the hopper rotates causing the melted sugar and other ingredients to be directed through orifices in the hopper out into the bowl. The spun candy may then be worked into a ball utilizing a stick on which the candy is gathered.

Abstract: An apparatus for measuring and dispensing sugar syrups from a hopper into a mold and employing a mounting block which defines at least one cavity for housing a dispensing valve.The valve comprises a movable cylinder operable by a first pneumatic means and a piston means operable by a second pneumatic means. A pair of sequencing valves are employed for actuating the first and second pneumatic means in a timed sequence for effecting the movement of the cylinder and piston of the dispensing valve.

Abstract: A unitary integral electrically heated nozzle device for plastic molding or die casting equipment which has a novel casing integral with a heater core, which is insulated to prevent conduction of electricity and loss of thermal transmission to the casing, the electrical insulation being compacted within the casing and around the heater core and the assembly being sealed and swaged into a unitary form, said device being structured to heat the area of a gate or passage for delivery of molten material into a forming cavity. The nozzle device may be shaped, and the nozzle systems include such nozzle devices in the gate channels for delivering molten material to the forming cavity.

Abstract: Apparatus is provided for preforming automobile rooftop coverings made of flexible sheets of vinyl and the like. The flexible material is treated with a thermosetting composition and then applied to an automobile rooftop form. Pneumatic tensioning means are attached to the edges of the material at a plurality of spaced-apart points to tension it over the form to a predetermined orientation and shape while maintaining the forces on the material substantially in equilibrium. The material is heated to set the thermosetting composition. Clamping means lightly engage the material to hold it in the predetermined shape until the setting temperature is reached and then firmly engage it to form maginal flanges thereon. The shaped material is then removed from the form by a vacuum carrier and then cooled and trimmed in the carrier.A pressure-sensitive adhesive and release liner may also be applied to the material so that after it is shaped it can be directly adhesively secured to an automobile rooftop.

Abstract: The disclosure relates to a process and device for the production of moldings from foamed thermoplastic plastic, e.g., polystyrol, in a mold, the mold wall enclosing a mold cavity, into which a filling injector discharges, and which is surrounded by an agent chamber and in which there runs an agent channel which is formed by drillings which are sealed at their ends against the outside and the agent chest by means of seals, and are connected to the mold cavity through nozzles. The drillings of the agent channel preferably run in ribs of the mold wall. The agent chest and the agent channel are connected through time-overlapping-controlled valves to an agent supply and removal system for the heating, cooling, inflation, curing, ejection of the mold walls and the molding respectively. A fast cycle sequence is achieved with a small consumption of energy and a high molding quality.

Abstract: A system for controlling a temperature of a molten resin in a cylinder of an extruder includes a plurality of temperature detecting elements which are disposed in a wall of the cylinder generally in a plane perpendicular to a longitudinal axis of the cylinder to detect the temperature of the cylinder. The temperature detecting elements are radially spaced by different distances from an inner peripheral surface of the cylinder wall. Detecting devices are provided for detecting an ambient temperature of the extruder and the number of revolutions of a screw of the extruder. A microprocessor unit is programmed to be responsive to detecting signals from the temperature detecting elements and detecting devices to calculate a proper estimated temperature of the molten resin and to calculate a difference between a desired temperature of the resin and the estimated temperature and to determine in accordance with this difference a set temperature of the cylinder wall.

Abstract: Temperature monitoring of electrically conductive wire during heating in which the current in the wire in the heating zone is measured and the voltage at the downstream end portion of the zone is measured, signals corresponding to the measured values then being combined to produce a resultant signal corresponding to the resistance of the wire at the downstream end portion of the heating zone. The resistance value corresponds to the temperature of the heated wire. Apparatus includes current and voltage measuring means located in the appropriate positions to enable temperature monitoring, and means to combine voltage signals which correspond to the measured values and to produce a combined signal representative of wire resistance after heating.

Abstract: Disclosed is a process for extruding thermoplastic resinous compositions, comprising the steps of heat plastifying the resinous composition in an extruder; cooling the heat plastified resinous composition exiting from the extruder to a uniform temperature desired for extrusion through an extrusion die, including conveying the resinous composition through at least one enclosed flow path in a cooling device, circulating a cooling medium about the entire circumference of each of the resin flow paths and controlling by the means of orifices the flow of thermoplastic at the inlet and the outlet of the cooling device across substantially the entire cross-section of each of the resin flow paths; and, extruding the cooled thermoplastic resinous composition through an extrusion die downstream of the cooling device.

Abstract: A film heating apparatus includes a vertical tank vertically adjustably mounted on a base supported post, a hollow vertical roller extends between and is journaled to brackets projecting from opposite ends of the tank, an electric motor driven pump mounted on the tank circulates a heat transfer liquid through and between the roller and tank through a rotary coupling mounted on the roller, the liquid in the tank being heated by an immersion electric heater which is energized in response to a temperature sensing member responsive to the liquid temperature and a second idler roller is supported between the brackets and is transversely spaced from the first roller.

Abstract: A nozzle ring of an extruder for blowing tubular plastics film is divided into cooling sectors provided with adjusting elements. The thicknesses of the blown film are measured over the circumference thereof and a number of film sectors of equal circumferential length corresponding to the number of cooling sectors is established from the measured thicknesses. Assuming that the film sector of maximum or minimum thickness has been extruded in the correct position for the purpose of determining the cooling sector associated with the film sector, the subsequent film sectors are in turn allocated to successive cooling sectors. From the measurements, the mean thickness distributions are determined over the individual film sectors. These values of mean thickness distribution define a measure for the correcting command for the adjusting elements of the cooling sectors that are associated with the respective film sectors.

Abstract: Thermoforming apparatus having a heating station and a forming station provided with upper and lower heaters for softening the thermoplastics sheet material. One of the heaters is movable between the heating and forming stations and is arranged to convey heated sheets from the heating station of the forming station.

Abstract: An apparatus for injection molding an article includes a pair of mold members, at least one of which is movable toward and away from the other. Each mold member includes a base plate, a manifold plate and a cover plate. Each base plate has inner and outer surfaces with a mold cavity in its inner surface and an annular recess in its outer surface. A plurality of connected grooves is in the bottom of the recess to form a channel. The manifold plate is an annular plate which is seated in the recess in its respective base plate. The manifold plate has inlet and outlet passages which extend to separate ones of the grooves in the base plate. The cover plate extends across the outer surface of the base plate and the manifold plate to hold the manifold plate in the recess. One of the base plates has a hole therethrough from its outer surface to its mold cavity to allow the flow of molding material into the mold cavity.

Abstract: A machine for molding sheets of foamed material includes an upright stationary steam chest having opposing perforated external faces, and a pair of movable assemblies abuttable with the opposite faces of the steam chest to define mold cavities therewith. Each cavity forming assembly includes a mold frame extending normal to a face of the steam chest, and a platen positioned within and coupled to the mold frame. Jackscrews move each mold frame into and out of abutment with the steam chest, and also move each platen relative to its respective mold frame toward and away from the steam chest. A method of molding sheets of foamed material is also disclosed wherein heated polystyrene beads are squeezed by the movable platens to a predetermined thickness to provide a board having the desired dimensions and density.

Abstract: An automated system for controlling the curing process of structures formed of fiber-reinforced composite material and the like in an autoclave is disclosed. The system uses sensors to monitor autoclave pressure, ambient and structure surface temperature, and structure viscosity during the cure cycle. Real time measurements are taken for each of these parameters, and the measured values are compared with predetermined optimum values which themselves change as the curing cycle progresses. The results of the comparisons are used to control the application of temperature and pressure in the autoclave to achieve the desired visco-elastic states of the structure which continually change as the curing process progresses. The viscosity data are obtained through measurements of attenuation of an ultrasonic wave in the composite material of the structure. It was found that the attenuation is directly related to the viscosity of the structure.

Abstract: A cathode structure for a sodium sulphur cell is formed by putting a fibre matrix into a mould which is closed to shape the matrix to the required form with compression of the fibrous material, the mould being kept at a temperature below 12.degree. C. and preferably between 8.degree. and 10.degree. C. while liquid sulphur is injected into the compressed fibre material.

Abstract: A method for mixing and masticating highly viscous materials in a mixing apparatus comprising a mixing chamber the wall of which is provided with heat exchange means for heating and cooling and at least one rotor, driven by a motor, wherein the energy utilized for mixing and masticating (UE) and the supplied energy (SE) are determined by recording the couple and the number of revolutions of the rotors, and the heat exchanged between the materials treated and the wall is determined by recording the temperature of the materials treated, the temperatures of the heat transfer medium on entering and leaving the heat exchange circuit and the flow rate of the heat transfer medium, and the ratio of UE to SE is adjusted to an optimal value at a minimal SE.

Abstract: A method and an apparatus for measuring and controlling foam sheet blow-up in a thermoformer oven. Control of the oven operation is achieved through monitoring the measured blow-up of a material which being heated in the thermoformer oven in order to regulate the thickness of the plastic material prior to its conveyance into a molding or forming station.

Abstract: Method and apparatus for molding polymeric materials using the reaction injection mixing (RIM) technique of combining two or more chemically reactive components immediately prior to their introduction into a mold. The invention is more particularly adapted to RIM molding of polyamide (nylon) type polymers, but is also useful for urethane polymers. In either case the polymers may be of the unfilled or of the reinforced type. Modification of conventional RIM technique is made to meet higher component temperature conditions required for nylon molding as compared to urethane polymers, for example. A characterizing feature of the invention is the employment of an attempering "oil tracer" system comprising casings and jackets enclosing the flow paths of each of the several reactive components, and the flow therethrough of a temperature-controlled oil or other fluid medium in heat-exchange but non-fluid communication with the reactive components.

Abstract: Foam molding apparatus, including a rotatable table, a plurality of molds disposed on the table, a device for heating and cooling each of the molds, a device being fixed in place relative to the table for filling a specific quantity of foamable reaction mixture having several components into each of the molds, a device for opening and closing each of the molds, a first computer connected to the opening and closing device and to the heating and cooling device for opening and closing each of the molds in dependence on the position thereof and for controlling the heating and cooling of each of the molds in dependence on time, and a second computer connected to the filling device for controlling the filling device in dependence on the position of the molds.

Abstract: Apparatus for continuous thermoforming of sheet material including an extruder, stretching means, a rotary wheel having female mold means thereon and plural plug-assist means interlinked so as to form an orbiting device having the plug-assist members engaging the sheet material about a substantial arc of wheel surface and means to reciprocate the plug assist members into and out of engagement with the female mold means.

Abstract: Crystalline polystyrene is thermoformed by extruding molten material into a temperature controlled roller press having press rollers and draw rollers separated by a support roller. The buildup of sheet between the support and draw roller is controlled. The edges of the sheet are heated and then gripped by a first set of sprockets and a second set positioned past the thermoforming device. The gripped sheet passes through a heating device where both sides of the sheet are heated before the intermittent action of the press.

Abstract: The present invention relates to a hot briquetting apparatus for producing reduced iron briquettes comprising a container for receiving high temperature reduced iron; a storage tank connected to and located underneath the container for storing reduced iron and a hot briquetting machine located at a bottom opening of the storage tank. The improvement involves a means for charging residual reduced iron powder, carbon or mixtures thereof as well as an inert gas into the storage tank, said charge means connected to the storage tank and penetrating into the storage tank so that it is attached in a fluid-tight manner; said powder, carbon, inert gas, etc., being funneled into the storage tank in specific proportions in response to control means which are activated by a temperature sensor in contact with the reduced iron within the storage tank.

Abstract: A machine for high rate production of molecularly oriented thermoplastic bottles is disclosed. The machine is of the reheat-and-blow type. A blow molding station simultaneously blow molds article preforms arranged in matrices by modular article carriers for conveying the preforms and articles through the machine. The carriers are designed to retain the preforms throughout all operations of the machine from a preform load station through a thermal conditioning section, a blow molding station, and to a bottle eject station, thereby eliminating the need for other preform transferring apparatus. The article carriers together with the associated conveying apparatus comprise a sufficiently flexible structure that minor misalignments of the carriers with the blow molding mechanism do not adversely affect bottle production. Both loading of preforms and ejection of finished bottles are accomplished by operation upon matrices of preforms and bottles as defined by the carriers and conveyor lanes.

Abstract: A core/sheath vibrating system is utilized to produce core droplets within the sheath, which in turn form into microparticles through phase separation. The flow momentum is first arrested by means of an inclined surface, and the combination is thence deposited, in a continuous, helical channel extending from one end to the other of the inside of a hollow, rotating drum. Rotation of the drum moves the forming microspheres through the channel. At the exit end of the drum, the sheath fluid which carries suspended microspheres, may be filtered, and the microspheres collected and utilized.

Abstract: A plastic material extruder having a barrel and an outer sheath with heating and cooling means in the outer sheath is disclosed, together with means for maintaining the temperature of the inner barrel, including two temperature sensing devices, one on the barrel and one on the other sheath, the sensing devices connected to control circuitry which actuates the heating and cooling means to maintain a temperature gradient between the two sensors by sensing the temperature change from the barrel and adjusting the set point of the sensing device on the sheath.

Abstract: A single injection blow molding apparatus for making a selected oriented finished product. The apparatus includes the support structure and an injection molding station where a parison is injection molded into a selected configuration. A core rod assembly cooperates in forming the parison which is formed about a first core rod. The parison is conditioned to an orientation temperature. A transfer system is on the support structure for removing the first core rod from the parison and transferring the parison to a blow molding station. The blow molding station is on the support structure and is provided for blow molding the parison while at orientation temperature into the configuration of the finished product. A second core rod assembly with a second core rod cooperates in blowing the parison into the configuration of the finished product.

Abstract: Apparatus for producing a porous plastic molded product of uniform, predictable porosity throughout. A fluidized airstream of moldable plastic powder is formed. Water may be injected into said fluidized powder airstream for maintaining said powder in a uniform, fluidized dispersion. The moisturized, fluidized, powder airstream is injected into a cavity of a closed mold to fill said mold cavity with said powder. The mold is maintained at a temperature and for a time sufficient to at least partially fuse said powder particles together without melting said particles, thereby to form a porous, plastic molded product. The mold is partially separated for cooling the product which is then discharged from the mold. The product may be further cured by heating the molded product in an oven at a temperature and for a time sufficient to cure said molded product without melting said plastic or glazing said product.

Abstract: The specification describes a tire vulcanizer adapted for use in performing the shaping and curing operation of a green tire efficiently and safely. The vulcanizer is characterized by means for lifting or lowering an upper ring, which includes a rotary means consisting of a ball screw shaft and nut cylinder, and a mechanism adapted to render said ball screw shaft rotate freely upon receiving a signal which is generated upon the completion of the shaping and curing operation.

Abstract: Control of a laminating press is attained by monitoring the temperature of the heating medium circulating through the press components.

Abstract: A conductive element (22) is preheated by a preheat power supply (34) to an initial temperature which is a function of line speed. The preheated conductive element (22) is advanced through an extruder (32) whereat a cellular insulation layer (24) and a solid plastic insulation layer (26) are extruded thereabout to form an insulated conductor (20). The insulated conductor (20) is advanced through an air gap (38) whereat the cellular insulation layer 24 expands about the conductive element (22). The insulated conductor (20) is then quenched at a point to stop the expansion of the cellular insulation layer by passing the insulated conductor into a cooling bath (40).A capacitance monitor (50) measures the coaxial capacitance of the insulated conductor (20) and develops an error signal.

Abstract: An injection mold with locking device comprises a fixed backing plate and a fixed mold part plate which are connected to each other by four tie rods. A movable mold part plate is connected to the fixed backing plate through a drive and locking mechanism which is capable of moving the movable mold part plate into a mold position with the fixed mold part plate. A thermal force control apparatus is associated with one or more of the tie rods for changing the temperature of the tie rods and thereby causing the tie rods either to expand or contract. By such expansion or contraction, the exact force applied between the fixed and movable mold part plates can be adjusted to a desired level.

Abstract: An apparatus for modifying the between the ribs space in a thermal plastic battery container is disclosed. The apparatus comprises a heated non-circular wiping member which when rotated about a fixed centerline defines a first circumference having a diameter substantially equal in length to the minimum between the ribs space and a second concentric circumference having a diameter greater in length than the first diameter.

Abstract: A nozzle ring of an extruder for blowing tubular plastics film is divided into cooling sectors provided with adjusting elements. The thicknesses of the blown film are measured over the circumference thereof and a number of film sectors of equal circumferential length corresponding to the number of cooling sectors is established from the measured thicknesses. Assuming that the film sector of maximum or minimum thickness has been extruded in the correct position for the purpose of determining the cooling sector associated with the film sector, the subsequent film sectors are in turn allocated to successive cooling sectors. From the measurements, the mean thickness distributions are determined over the individual film sectors. These values of mean thickness distribution define a measure for the correcting command for the adjusting elements of the cooling sectors that are associated with the respective film sectors.

Abstract: A nozzle ring of an extruder for blowing tubular plastics film is divided into correcting sectors provided with adjusting elements. The thicknesses of the blown film are measured over the circumference thereof and a number of film sectors of equal cross-sectional area corresponding to the number of correcting sectors is established from the measured thicknesses. Assuming that the film sector of maximum or minimum thickness has been extruded in the correct position for the purpose of determining the correcting sector associated with the film sector, the subsequent film sectors of equal cross-sectional area are in turn allocated to successive correcting sectors. The throughput and cross-sectional area or temperature of the respective correcting sector is adjusted until the circumferential lengths of the film sectors are equal.

Abstract: A method of extruding a cross-linked material, more particularly an insulating cross-linked material around an electrical cable. In an extrusion machine comprising a housing terminated with an extrusion head and provided with a filtering means adjacent the outlet end of said housing, the cross-linkable product is fed without addition of a cross-linking agent, said cross-linking agent being first introduced in said cross-linkable material downstream said filtering means. The cross-linkable material is kept in the housing at an elevated temperature to be in a fluid state, the cross-linking agent being introduced at a temperature slightly lower than its reaction temperature, whereby the extrudate may be at a temperature near the maximum temperature admissible for the extrusion of said material.

Abstract: A flexible lip die blade is provided in which local flexing of the blade is brought about by activation of heaters located in connector members connecting the flexible lip with the body of the die blade.

Abstract: A method and apparatus for belling a plastic pipe wherein the pipe is heated until a predetermined force can move the pipe onto a mandrel; the magnitude of the force being such that the pipe is heated to a temperature between its memory temperature and its breakdown temperature.

Abstract: The transfer press has a blank-supply mechanism for supplying blanks which are materials for every kind of part to be manufactured by pressing, one by one to a press, a blank-transport mechanism for carrying blanks from the blank-supply mechanism to the press, a transfer feed mechanism for feeding blanks that have been supplied to the press one by one to dies of each stage along the bed of the press, a die exchange mechanism for exchanging dies when different parts are to be manufactured, a feed bar exchange mechanism for removing and exchanging feed bars which are a part of the transfer feed mechanism, when dies are to be changed, a die cooling oil circuit connecting mechanism for connecting a cooling circuit to a newly placed die in order to cool it, a pressure adjusting mechanism for die cushioning mounted on the bed of the press, and a program control mechanism for the automatic operation of the press, which controls the above-described mechanisms as well as the press in relation to blank supplying and ma

Abstract: A roller die apparatus includes a pair of cylinder rolls which are rotatably and obliquely yieldably mounted on a frame disposed on the output end of a plastic extruding machine. The rolls are biasedly restrained in the frame to permit the obtusely directed movement thereof with respect to the direction of extruded plastic flow. This non-orthogonal movement of the cylindrical roller members facilitates adjustment and cleaning thereof.

Abstract: New type of hydraulic presses with heating plates are described.The press ensemble has a compact structure which allows the symmetric absorption of expansions due to heating and is equipped with ways allowing to bring the heating plates to a same level in comparison to the ground.The hydraulic presses are used to form moldable material by polymerization and pressing of rotor hubs of helicopters.

Abstract: An improved slit die for extruding thermoplastic sheet and having the capacity for fine gauge control comprises a die blade and an opposed surface in which the local separation between the two is variable by the generation of localized expansion and contraction forces in the body of the die blade while isolating the die blade lip from temperature variations by the provision of a heat barrier means.