Abstract: A conveyor having an endless conveying belt, which includes a series of slats, which in the upper course of the belt constitute a conveying surface. The slats include sheet metal blanks and are supported on link chains. The slats are adapted to be manually removed from and to be inserted into the conveying belt. The link chains extend along opposite edges of the conveyor belt and mesh with chain sprockets, which constitute reversing pulleys. The design permits a rational series production and permits the use of the conveyor even for a delivery of very hot moldings made of plastics which have aggressive and/or abrasive properties. When slats or chain links have become soiled to such an extent that the function of the conveyor may adversely be affected or when defects have occurred, such parts can be replaced with a low expenditure of work and with a simple manipulation.

Abstract: An interlocking device for a HIP equipment that prevents possible damage to the HIP equipment arising from use of a furnace or processing gas in error and can control the oxygen concentration and pressure within the HIP equipment. The device includes a sensor for detecting a concentration of oxygen in the processing gas in a processing gas pipe system. If the sensor detects an excessively high oxygen concentration, a supply side interlocking mechanism closes a valve for the pipe system and disconnects a power source for a furnace in a high pressure vessel. A flow switch is connected to a safety pipe system having a safety device, and a thermocouple is provided for each of the safety and processing gas pipe systems and a relief pipe system.

Abstract: A bread moulder has a feed chute for receiving dough pieces and directing them between counter-rotating sheeting rollers for flattening the dough and delivering it to apparatus for working it between convergent runs of driven endless upper and lower belts. A shutter is hinged in the feed chute and is biased to closed position but is yieldable under impact of a dough pieces thrown onto it to allow the dough piece to pass through the feed chute. A safety gate in the form of a double grille, V-shaped in end view, is hinged to the feed chute and is movable by a handle to cause its leading part to move the shutter into the chute to dislodge any dough lodged therein, its trailing part forming a barrier before the sheeting rollers.

Abstract: Disclosed is a device for preventing the scattering of ejected molded articles in a plastic forming. The scattering prevention device includes screens made of a synthetic resin film and disposed at both sides of molds mounted on a fixed die plate and a movable die plate and inside a space defined by tie bars in such a manner that the molds can be covered, and magnetic assemblies coupled to the two lateral ends of each of the screens for fixing the screen to the molds or die plates. The synthetic resin film screens are mounted on the molds or the die plates only by the use of the magnetic assemblies. Each of the screen follows the clamping of the mold, and is contracted and folded. It is extended when it follows the opening of the movable mold.

Abstract: A mold which comprises a pair of mating, openable and closeable mold halves and a lock to hold the mold halves together. The lock is defined by a recess in the outer surface of one of the mold halves. A lifting bridge crosses the recess, being proportioned to permit a lifting hook in the recess to pass underneath to engage the bridge. An elongated member is secured to the other of the mold halves, being slidably extendable into the recess when the mold halves are substantially closed. The elongated member defines a longitudinal slot facing outwardly of the recess in closed position to receive at least a portion of the lifting hook as the hook engages the bridge. The slot defines an end opposed to the other mold half which is closed, to prevent a hook portion in the slot from sliding past the opposed end. Thus, the mold in closed position cannot be opened while the lifting hook is present in the slot.

Abstract: A safety plug for an extrusion apparatus for extruding pipe is provided with a valve opening when its tether to the extrusion die breaks. The valve can be formed by a disk on a rod which is axially displaceable in a tubular body having a flange forming a valve seat for the disk of the rod. The rod is connected to the chain.

Abstract: A guard at the inlet side of the nip of two rolls in a calender or a like machine has an elongated support which is mounted in the machine frame for movement toward and away from the rolls at the inlet side of the nip. The support carries two elongated strips each of which is adjacent one of the rolls and has several sections. The support carries discrete moving mechanisms for the sections of each strip regardless of whether the sections are discrete sections or such sections form parts of a one-piece strip. This renders it possible to select and alter the width of the entire clearance between each strip and the periphery of the respective roll regardless of eventual deformation of the support and/or of the rolls.

Abstract: A vibrating type concrete pipe making machine, in which very high frequencies of vibration and large inputs may be attained without excessive wear on the mold or shortened bearing life. It also includes lubricant and coolant systems which are combined into a single system.

Abstract: A method for controlling an injection motor of an injection-molding machine to prevent overheating such that injection-molding conditions to prevent the injection motor from overheating can be set securely. When injection-molding conditions are initially set (S1-S3), the ratio (R) between the integral of the amount of heat, produced by an injection motor driving current for one injection-molding cycle, and the allowable integral of the heat amount obtained when a continuous rated current flow is calculated (S5) before the one injection-molding cycle is executed in accordance with the new set injection-molding conditions. Then, the calculated ratio (R) and an allowable ratio (Rmax) are compared, and it is previously determined (S6) whether an overheating state of the injection motor can be produced when the injection-molding cycle is executed in accordance with the set conditions. If overheating can be produced, a warning is issued (S7).

Abstract: Disclosed is a device for preventing the scattering of ejected molded articles in a plastic forming. The scattering prevention device includes screens made of a synthetic resin film and disposed at both sides of molds mounted on a fixed die plate and a movable die plate and inside a space defined by tie bars in such a manner that the molds can be screened, and magnetic assemblies coupled to each of two lateral ends of each of the screens for fixing the screen to the opposed molds or die plates, so that, while the molds are open, the screens are extended, while the molds are being clamped, the screens are contracted and folded. The height of each of the screens is set such as to be smaller than a gap between the upper and lower tie bars, so that the screens can be folded outwardly from between the upper and lower tie bars.

Abstract: A slide falling prevention device in a tire vulcanizer including a vulcanizer frame, a fixed lower die fixedly located on the vulcanizer frame, a slide adapted to be lifted and lowered along the frame, a movable upper die retained to the slide and adapted to be vertically opened and closed relative to the lower die, a vertically moving member provided at a central position of the slide for opening and closing the upper die, a hollow pressure member provided at the central position of the slide for applying pressure to the upper die, said hollow pressure member being located diametrically outside the vertically moving member in such a manner as to be concentrical to and separate from the vertically moving member, a pressure device mounted to the vulcanizer frame in such a manner as to surround the hollow pressure member, an upper die height adjusting mechanism for connecting the slide with the hollow pressure member; and a movable pressure member provided in the pressure device and a locking member disengageab

Abstract: Pressure is controlled in plural stages of a shaping system for a green tire in a curing press, so that each successive shaping stage is completed when a target pressure for that stage is reached. A radial tire is preferably shaped in three stages in the first of which a first target pressure in the range from 2 psig to 5 psig is the desired shaping pressure; in the second stage, a second target pressure in the range from 7-10 psig is desired; in the third stage, a third target pressure in the range from 10-15 psig is desired. A pressure transducer (PT) senses the pressure in a bladder, one PT for each bladder. A programmable controller (PC) which controls operation of the press, stores and executes a sequence of instructions which determine the optimum desired shaping pressure for each stage, computed from the type and size of the tire to be cured, the period of time the press is down before it is loaded, and the number of heats on each bladder.

Abstract: A die locking mechanism for a molding apparatus including stationary and movable die assemblies, has a stop bar movable back and forth with respect to the stationary frame structure in a direction parallel with the direction of movement of the movable die assembly, and a locking member rockable between first and second angular positions about a fixed pivot axis. The locking member has a cam lobe portion generally arcuately curved about the pivot axis and is engageable with the stop bar, the cam lobe portion being disengaged from the stop bar with the locking member in the first angular position and being engageable with the stop bar with the locking member in the second angular position so that the movable die assembly is locked in position with respect to the movable die assembly.

Abstract: A mold comprising mold halves separable along a parting line has a rotating lifting handle carried by one of the mold halves, where the handle rotates between a first position in which it lies generally flat against the mold and a second position in which it extends outwardly from the mold to permit engagement by a lifting hook or the like. By this invention, rotation of the lifting handle from the first to the second position is prevented when the mold halves are separated along the parting line by more than a predetermined distance. Thus the mold cannot be lifted, since the handle cannot be rotated into outwardly extending position to receive the hook until the mold is closed. Additionally, this invention may be used to prevent opening of the parting line between the mold halves when in closed relation, while the handle is in the second position.

Abstract: A conveyor means including axles 14, on which the drums 17 for an endless conveyor belt 18 are rotatably mounted, and which extend within a chassis. The chassis includes a core 10 disposed between the upper and lower belt runs 18a, 18b of the conveyor belt 18 and between the drums 17, and two side walls 11 which are secured to the longitudinal sides of said core. A hydraulic drive motor is disposed between the belt runs 18a, 18b and extends parallel to a drum 17. This arrangement permits the conveyor means to be a compact, structural unit which can be completely assembled externally of the machine base, can be tested for reliable running and can then be inserted into the narrow discharge passage of the machine base.

Abstract: The present invention provides a food packing machine which includes the following components: a piston mounted for reciprocation during an operating cycle between a pair of limit positions toward and away from a cake forming cavity, for compressing food material in the cavity; bias apparatus for exerting pressure on the piston to provide compression pressure on the material, the bias apparatus including a resilient material mounted to the piston, and a seat to which the resilient material is also mounted to effect a resilient mounting between the piston and the seat; and pressure relief apparatus for selectively urging the set away from the piston to reduce the bias thereon upon reception of a predetermined signal. The machine normally also includes a sensor for sensing when the machine is deactivated, and a signal device for providing the signal to the pressure relief apparatus when the sensor determines that the machine is deactivated.

Abstract: A contact sensing system senses the contact of two parts, such as the closure of two die parts in a molding machine, and controls a subsequent event such as the introduction of fluent molding material into the mold when closure of the die parts is sensed. One of the die parts is provided with an orifice which is covered by the other die part when the mold is closed. Sensing is achieved by delivering air through the orifice using an air line and sensing the pressure increase in the line when the orifice is closed by the other die part. A control module houses the components of the sensing system and protects the components in hostile environments.

Abstract: A safety cover arrangement for the die closing unit of an injection molding machine equipped with a program-controlled die exchange mechanism using a translation table with two die emplacements alternatingly moving into a central transfer position for the die assemblies, the cover assembly comprising a central stationary cover portion with a vertical panel portion and an adjoining horizontal panel portion, two rectangular access openings flanking the stationary cover portion on opposite sides, and two sliding covers with matching vertical and horizontal panels closing said openings, the covers being openable, one at a time, by moving behind and below the central stationary cover portion, following the release of a cover latching mechanism by a cam on the translation table. Each sliding cover carries a control rail for the actuation of a pair of limit switches shutting down the machine operation, when the cover is opened.

Abstract: Method and apparatus for making a continuous length of tubing having an annular wall formed of polyurethane, including a forming cylinder having a mandrel extending centrally therethrough. Two strips of paper material are pulled through the forming cylinder, one surrounding the mandrel and one being disposed at the interior surface of the cylinder, and a curable plastic mixture is injected into the annular space between the paper strips. A sensor is provided to determine the point at which curing of the plastic mixture begins in the annular spacing within the cylinder, and the speed of travel of the paper through the cylinder is regulated as a function thereof. The control system shuts the apparatus down if a break in the paper strips is detected, or if the paper supply approaches exhaustion, or if the point of full curing is within a predetermined minimum spacing from the inlet end of the cylinder.

Abstract: A machine base for an injection molding machine welded together of die-cut and die-formed sections of steel sheet, including a U-shaped base member, front and rear end walls, and an intermediate partition wall. The folded-over upper edges of the base member side walls carry two guide rails supporting and centering the die closing unit, and the front end wall has a parts discharge opening accommodating a longitudinally oriented parts discharge conveyor in a height-adjustable mounting arrangement. This makes it possible to have closed side walls on the machine base which prevent operators from reaching into the work space of the machine.

Abstract: An isostatic press includes a closed press frame, there being a pressure chamber bearing against a first interior portion of the frame. A conveyor path for pressure chamber closures (3) each carrying a press tool part, extends through the frame under the pressure chamber, displacement means being arranged for lifting in the plane of the frame a chamber closure (3) into contact with the pressure chamber. During pressurization of the pressure chamber (1) the closure (3) is carried by two separate support legs (4,5) pivotably mounted in the plane of the frame, the conveyor path extending between the legs. The closure (3) is carried in the plane of the frame by a portion (72) of the conveyor path, which constitutes the lower press table of the press and is supported by the legs. The free end surfaces of the legs may have an arcuate contour in the plane of the frame and coact with complementally formed surfaces on the underside of said portion (72).

Abstract: An illustrative embodiment of the invention extrudes dough through two hoppers. A cutting wire severs the extruded portions of the dough from the extrusion hoppers after a predetermined delay. The extrusion press, moreover, is of intermittent action in response to the quantity of dough extruded from the hoppers. Safety interlock switches associated with the apparatus housing automatically deenergize the apparatus.

Abstract: A screw-extruder for shaped food pastes such as spaghetti is removably mounted on a base containing a prime mover. To ensure the safety of the assembly an activator is associated with the cylinder housing the screw and can only actuate a switch in the base when the cylinder is correctly positioned. The actuator may take the form of a manually operable pushbutton on the cylinder, or a lever acted on by the cylinder and acting as a mechanical interlock with a pushbutton and permitting its operation only when predetermined conditions are satisfied. In each case the pushbutton will only act to permit operation of the motor when it is properly positioned relative to a switch in the base.

Abstract: For the purpose of pressurizing and holding the pressure in a pressurizing hydraulic cylinder is a hydraulic vulcanizing press, a pneumatic booster (more particularly, a pneumatically operated hydraulic pressure booster) for supplying a desired hydraulic pressure to the hydraulic cylinder is provided in a hydraulic circuit on a pressurizing actuation side of the pressurizing hydraulic cylinder. In addition, in the pneumatic input circuit for the pneumatic booster is provided a switching device for switching a pressurized air fed to the pneumatic booster between a high pressure air for boosting a hydraulic pressure to a desired hydraulic pressure and a low pressure air for holding the desired hydraulic pressure after the desired hydraulic pressure has been attained.

Abstract: An upright injection-compression pressing machine for the manufacture of information carrier discs, such as photograph records and video discs, has a mold clamper assembly including a pair of stamper bearing molds movable relative to each other in a vertical direction towards and away from each other, and an injector assembly mounted on the clamper assembly in alignment with the direction of the relative movement of the molds.

Abstract: In accordance with the present invention, there is provided an improved arrangement for and method of electrically testing a cord-set during the molding of the male plug and female receptacle to the opposite ends of the insulated electric cord. In order to accomplish this, the mold for forming the molded plug and receptacle is provided with suitable contacts which upon the closing of the mold automatically establish electrical connections between the terminals of the cord-set and circuits in testing apparatus. These tests consist of checking for continuity in each conductor and for shorts between conductors or terminals and a skin ground test for the purpose of detecting stray strands of wire or any current carrying object that would carry current to the outside surface of the molded plug or receptacle.

Abstract: A pasta machine has an L-shaped base formed with an extruder seat and provided internally with a gear transmission having an input projecting in one direction from the base, and mixer and extruder outputs projecting in the opposite direction. An extruder body has an extruder chamber provided internally with an auger and is formed with a window opening radially into the extruder chamber. A mixer body has a mixing chamber secured to the extruder body and communicating with the extruder chamber through the window. This mixer body is provided internally with a mixing rotor that extends along and is rotatable about a mixer axis parallel to the extruder axis, and with a lid engageable over and closing the mixer body. The extruder body can be releasably interfitted with the extruder seat so as to fit the auger with the extruder output of the transmission and to fit the rotor with the mixer output of the transmission.

Abstract: A manually fed dough sheeter safely operable by anyone because of novel guard mechanism which physically prevents operator contact with sheeting rollers in operation, comprising dough piece receiving bin with top inlet aperture spaced well above rollers and defining passage thereto, first guard with lower portion blocking passage and movable by dough piece to move an upper portion to close inlet aperture, manually operable pusher for forcibly presenting to rollers dough piece stuck in passage, tray for receiving sheeted dough and enabling manual movement thereof through ninety degrees and sliding into second stage of sheeter, with second guard closely spaced above tray to prevent hand contact with second stage rollers, surface of tray being textured to substantially eliminate frictional resistance to dough sheet movement, and a circuit for controlling operation of roller driving motor manually or automatically for predetermined time in response to dough piece movement of first guard.

Abstract: A control system for controlling a molding machine used for exothermic curing senses the rate of change of the temperature of the material in the mold. When the rate of change of temperature has first exceeded and then fallen below a predetermined reference level, it is determined that the exothermic curing reaction has been completed, and the mold is opened after a predetermined delay.

Abstract: A power press in which a ram is driven towards and away from a press bed so that, in use, a work piece is deformed by a tool mounted between the ram and the press bed is provided with means by which a jam in the press can be released both quickly and simply, this release means comprising a layer of heat softenable rigid plastics material which is located in the press so that the direction of the press stroke is substantially normal to the layer and so that during a pressing operation the layer is subjected to compressive stress in the direction of press stroke, and electrical heating means located so that it is capable of heating the layer of plastics material, when desired, to a temperature sufficient for the plastics material to soften whereby, under compression in the direction of the press stroke, the thickness of the plastics layer decreases.

Abstract: Means for controlling the action of a blow molding machine of the type having a continuously extruding parison. The control means includes a photocell signal circuit responsive to extrusion of each parison at normal speed to initiate the decompression of a product at the blow molding station and opening and transfer of the mold halves back to the parison station. Should material in the extruder become depleted, the slower parison extrusion time will be detected and initiate signals for an alarm and deactivation of the blow molding machine. Means are also provided for disenabling this alarm and deactivation system if it is desired to "dry cycle" the machine for test purposes without running the extruder.

Abstract: An injection molding machine having a safety gate slidable to a closed position to block access to a mold space includes a lever and a latch which cooperate with an adjustable safety bar mounted on a movable platen of the molding machine to prevent the safety gate from being opened during a machine cycle. The lever and the latch also prevent the machine from operating when the safety bar is not properly adjusted.

Abstract: An arrangement for enclosing press apparatus, including a die set and a reciprocating punch block, within a hazardous environment. The die set and punch block are sealed within an enclosure room into which an elongated drive shaft, which connects the punch block and a drive unit, passes. The drive shaft is sealed at the point where it passes from inside to outside of the room, while allowing the shaft to reciprocatingly move. The arrangement provides access to the drive unit for maintenance, external to the hazardous environment and, in the event of a release of hydraulic fluid in an hydraulic drive, the fluid is maintained segregated from the hazardous environment and the material therein.

Abstract: The following specification describes a safety shield assembly for centrifugal casting apparatus of the type used by hobbyists. The assembly comprises a ring wall encircling the path of rotation of the casting arm carrying the metal charge and mold. A top wall is provided having a central opening through which access is provided for heating the metal and releasing the arm carrying the charge and mold for rotation. The top wall is provided with a fixed wall portion and a lid hingedly secured along a diameter line of the ring wall and foldable into coincident relationship with the fixed top wall portion.An annular bottom wall adapted to be secured to a table top is also provided for the ring wall and a cup shaped housing adapted to be recessed in the table top is fixed to the bottom wall. The housing has a back wall for supporting the centrifugal casting apparatus with arms of the casting apparatus located just above the table top to reduce the height required of the ring wall.

Abstract: A blow molding machine wherein a shield is movable to and from an operative position in which it prevents access to the mold sections. The hydraulic motors which move the mold sections can receive pressurized fluid only when the shield is locked in the operative position by a roller. When the roller is retracted from its arresting position, a mechanical power train automatically closes valves which are installed in conduits connecting the motors with oil pumps. The valve elements of the valves are mechanically coupled to each other and to the roller, and are biased by a spring which tends to maintain the roller in the arresting position. A single-acting hydraulic cylinder is employed to move the roller from the arresting position. The shield can be moved by hand and/or by a double-acting hydraulic cylinder.

Abstract: A protective hood for a tablet compressing machine includes a heavy cover plate 12 resiliently supported on the top of the machine frame 11, vertical support members 14, hinged windows 16 secured to the support members by locks 21, and acoustical absorption plates 15 above and below the windows. Environmental integrity is implemented by channel members 17 around the edges of the support members and provided with chambers 18 kept at a positive pressure through inlets 19. The chambers are closed by rubber seals 20 around the edges of the windows 16.

Abstract: A molding press for forming articles from thermoplastic sheet materials comprises a generally hollow, fluid-tight housing, the lower surface of which comprises a flexible gas-tight diaphragm. The housing is movably positioned above a flat base, on which there is placed a mold covered with a softened sheet of thermoplastic material. During a molding cycle, the housing is lowered and interlocked with the base bringing the diaphragm adjacent the mold, and a fluid under pressure is introduced into the housing, causing the diaphragm to exert a uniform force on the thermoplastic sheet and forcing it to assume the contours of the mold. The base is equipped with mechanical and electrical interlock means which cooperate with the housing to insure that the fluid pressure cannot be applied until the housing and the base are safely interlocked and that the housing cannot be separated from the base while fluid pressure is supplied to the housing.

Abstract: A powder molding press, for compression-molding a raw powder between a pair of metal molds coupled to a pair of metal mold securing devices. At a preset spacing, the movement of the metal mold securing devices toward each other is electrically detected in order to cut off the driving means advancing the metal mold securing devices. In addition, the movement of the metal mold securing device is mechanically stopped by means of stoppers, with the result that the final position of the metal molds can be precisely regulated.

Abstract: A mold closure assembly for a mounting press for mounting metallurgical specimens in a plastic mount including a cap lockingly insertable in the upper end of the mold, a conical member disposed in a mating conical recess in the lower end of said cap, spring means for urging said conical member into such mating relation, a compression member adapted for a sliding fit in the mold and handle means attached to the cap and foldable to a non-obstructing position to permit a temperature control unit to be attached to or removed from the closure assembly.