Abstract: A stamper plate attaching/detaching device of an injection mold for forming an optical disc substrate wherein a stamper plate is supported in a cavity which is formed by a cavity side disc cavity plate, a movable disc cavity plate, and a cavity ring. The stamper plate attaching/detaching device is equipped with a section for holding the outer circumferential rim of the stamper plate by means of the inner circumferential rim of the cavity ring, which inner circumferential rim is larger than the outer diameter of the stamper plate. A plurality of pairs of permanent magnets, which have magnetic poles in parallel with respect to a central line are buried, with phase differences, on the same radial line of the cavity side disc cavity plate and the movable disc cavity plate. The cavity ring rotates between a first angle position and a second angle position in relation to the cavity side disc cavity plate and the movable disc cavity plate.

Abstract: Foam forming techniques are capable of permitting foaming of biodegradable resin to be positively and uniformly accomplished to provide a biodegradable resin foam with satisfactory quality. The biodegradable resin including foam is made of biodegradable resin a main biodegradable resin ingredient of 100.degree. C. or more in melting point and a low-melting biodegradable resin ingredient of 100.degree. C. or less in melting point. The biodegradable resin foam is produced by placing a starting material of at least biodegradable resin and a substantial amount of moisture in a heated and pressurized environment, releasing the starting material from the environment to foam the biodegradable resin, and subjecting the foamed resin to forming by a forming mold. An apparatus for producing the foamed biodegradable resin foam includes a pressure adjusting chamber, an air-permeable forming mold, a pressure reducing tank and an injection machine.

Abstract: A polymer injection molding unit is disclosed having a mold wall which includes a portion made of an infrared transmissible material which is radiated by an external infrared radiation source. Due to the passage of the infrared radiation through the infrared transmissible material, the infrared radiation is not absorbed by the mold wall and the mold wall is not substantially heated. The infrared radiation passes through the mold wall and is absorbed by the molten polymer material near the mold wall. As a result, the temperature of the molten polymer material rises and its viscosity is lowered to thereby enhance the shape transcription of complicated or fine shapes present on the mold wall, without increasing the temperature of the mold wall.

Abstract: An injection molding machine has a pair of C-shaped tension members interconnecting the fixed bracing plates at location above the axis of force action in the mold closing and injection operations. The mold closing unit is mounted on one of these plates and a mold part on the other plate while the mold closing unit acts on the movable mold part. According to the invention, the fixed plates are also interconnected by lower tension members which can be C-shaped or can be tension rods so that access to the space between the mold parts remains available, the upper and lower tension members being matched as to elongation under the generation of the mold closing and injection forces.

Abstract: A hole former for use in forming a concrete wall section having a hole extending therethrough. The concrete wall section is fabricated in a cavity that is defined by a first and a second form. The hole former comprises a plug and a preferably detachable suction cup. The suction cup retains the plug in a selected position between the first and second forms while concrete is being poured into the cavity.

Abstract: A stamper plate mounting device for an injection mold for making an optical disc substrate. A stamper plate is detachably supported in a cavity hollow which is formed between a cavity side disc cavity plate and a movable disc cavity plate of the injection mold for making an optical disc substrate. A central hole is provided at the center of the disc cavity. The stamper plate mounting device has (1) means for holding the inner circumference of the stamper plate which has, on one end thereof, a flange for holding the inner circumference of the stamper plate and which is precisely fitted in the central hole from the other end thereof, and (2) permanent magnet which is buried in the bottom surface of the central hole or in the other end of the means for holding the inner circumference of the stamper plate and which has a magnetic pole in the axial direction.

Abstract: An apparatus for precisely and adequately filling each of upper and lower flask bodies with molding sand equipped with upper and lower compressed air jet mechanisms (which fluidize molding sand at side and lower parts in a substantially horizontal part of each of upper and lower blow heads) and upper and lower guide members (which guide molding sand so as to disperse it toward the entire area of end openings of the blow heads after the molding sand in each blow head has first been focused on the blow head's central part) projectingly provided in the upper and lower blow heads, and a blow head for use in such an apparatus. Thus, the molding sand in the upper and lower blow heads is almost entirely fluidized by jetting compressed air from the upper and lower jet mechanisms when molding sand is blow-squeezed into upper and lower flask bodies.

Abstract: An apparatus for plasticizing thermoplastic synthetic plastics material includes a screw (13) which rotates within a housing (12) and plasticizes the synthetic plastics material which is supplied by a supply mechanism (27) through an intake opening (10) of the housing (12) of the screw (13). The housing (12) of the screw (13) is provided on its inner wall with at least two wide pockets (23,24). These pockets (23,24) extend in longitudinal direction of the screw (13) and are separated from each other by ribs (25,26) which are narrow, when compared with the width of the pockets. One pocket (24) is open towards the intake opening (10), the other pockets (23) are closed by at least one rib (25,26) of the housing (12) of the screw (13) with respect to the intake opening (10). In order to improve filling of the screw (13), the supply mechanism (27) for the synthetic plastics material to be treated cooperates with the screw (13).

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 improved mold assembly is provided for use in a thermo-forming press having a first and a second platen movably engageable there between. A first die member of the assembly is configured to be carried by the first platen. A second die member is configured to be carried by the second platen, and is constructed and arranged to mate in assembly with the first die member. Aa resilient member is disposed between one of the die members and an associated one of the platens. The compliant member is constructed and arranged to provide compliant engagement between the first and second die as first and second platens on which they are mounted, respectively, are engaged together to form a web of plastic material there between during a thermo-forming cycle.

Abstract: An apparatus for producing a three-dimensional object by successive solidification of layers of a powder material at points corresponding to a cross-section of said object using electromagnetic or particle radiation comprises support means having an upper side for supporting the object thereon at a determined elevation, elevation adjustment means for varying the elevation, means for applying a layer of the material onto the upper side or onto another layer formed on the upper side, and irradiation means for irradiating the layer of the material at the points corresponding to a cross-section of the object. For reducing the production time of the object the apparatus further comprises a prefabricated base plate on the upper side, the base plate being made of a material which the powder material adheres to when being solidified, and means for removably connecting the base plate to the upper side of the support means.

Abstract: The apparatus is provided to make a melt blown fibrous medium and includes first and second melt blowing dies for respectively issuing first and second streams of melt blown fibers along first and second melt blown paths. The first and second streams are issued on a forming surface where the streams are collected to form a melt blown fibrous medium. A movable transfer surface is interposed between the first die and the forming surface in the first path so that the first stream of melt blown fibers impinges on the transfer surface in advance of the forming surface such that the first stream is transferred to and brought into contact with the second stream of melt blown fibers on the forming surface.

Abstract: An inducer with reduced number of blades and varying density porous media disks are arranged in a deoiler mounted on a rotating shaft for total free separation of the oil from and air/oil mixture. The porous media disks are arranged with the lower density grade coming into contact with the air/oil mixture and proceeds toward the higher density grade. The arrangement of the stages of separation, the specially designed oil discharge holes and the flow geometry maximizes oil separation and removal and reduces pressure losses to control the pressure drop of the deoiler.

Abstract: An agglomerator structure, used in conjunction with a sifting structure, is described to provide variable sized agglomerates and uniform agglomeration, using at least one cone, with apex pointing toward the feed flow, and an inverted cone with a screen below. The agglomerator structure is provided to enable convenient use in a sanitary environment, with the system including an agglomerator cone above the inverted cone, which defines a central opening for feeding the material to one or more screens. The system is primarily designed for use with a vibration-imparting structure to better enable use in a sanitary environment.

Abstract: An extruding apparatus for intermittently supplying a predetermined quantity of highly viscoelastic material, e.g. food material. The apparatus has a hopper having a supply pump, a supply pipe having one end connected to the pump and the other end to an extrusion valve, and an accumulator (constant pressure device) mounted to the extrusion valve for maintaining the pressure of the food material in the extrusion valve at a predetermined constant pressure.