摘要:
The present invention provides an injection molding die having a simplified valve gate and simplified attachment structures for the valve gate. The die includes: a first die 4 with a gate 7; a second die 20 forming, together with the first die 4, a molding cavity 23 that communicates with the gate 7; a manifold 10 containing a molding material supply path 12 communicating with the gate 7; a thermal insulation space 16 disposed between the first die 4 and the manifold 10; and a valve gate 24 disposed between the first die 4 and the manifold 10 opening and closing the gate. The valve gate 24 includes: a valve pin 25 passing through the first die 4 and the manifold 10 and opening and closing the gate 7; a sealing member 27 mounted on the manifold 10 where the valve pin 25 passes through and providing a seal between the manifold 10 and the first die 4; and a heater 29 heating the manifold 10.
摘要:
A stack injection molding apparatus has first and second arrays of valve gate injection nozzles and separate mechanisms for independently actuating the nozzles of each array. A separate reciprocating yoke plate engages the valve pins of each nozzle array, and is actuated by either one centrally located actuator or a pair of symmetrically located actuators.
摘要:
An injection block for the injection molding of thermoset polymers, such as rubber, formed from at least a pair of plates bolted or otherwise releasably held together and defining an improved runner system between the plates. Complimentary grooves formed in each plate substantially completely surrounding the portion of the runner system formed between the two plates to define, when the plates are mated together, a passage or enclosure constructed to receive a sealing member therein to prevent leakage of the material to be molded beyond the sealing member between the plates. Thus, the sealing member limits the leakage or creeping of the molding material from the runners. This is believed to limit the surface area over which the relatively high pressure under which the material is molded acts between the plates to limit the force tending to separate the plates. The plates may be releasably held together by a plurality of cap screws, bolts or screws without failure in use of the injection block. Bolting the plates together is desirable because it facilitates separating them to clean them, remove molding material, or otherwise service and maintain the injection molding block throughout its life.
摘要:
According to the present invention, a manifold mounting arrangement is provided wherein a leg manifold is securely mounted midway along its length rather than at its sprue bushing and whereby thermally induced length changes are accommodated outwardly from its centre. Additionally, a first end of the leg manifold is clampingly secured between a sprue housing and a manifold insulator to avoid movement of the first end toward the sprue upon a sprue break portion of the injection moulding cycle.
摘要:
A rotary device for a horizontal injection molding machine is configured in the form of a module frame which includes a base plate and a turntable rotatably mounted on the base plate. Drives are provided to move the base plate in longitudinal direction and to rotate the turntable. A fixed mold mounting plate of the injection molding machine can be mounted on a mounting structure of the module frame, whereas a moveable mold mounting plate is received in guides along the sides of the module frame.
摘要:
A runner system and runner component particularly adapted for use in multiple cavity injection molding systems is disclosed. The runner system and runner component utilize particular structural features and geometrical configurations that have been found to result in superior molding practices and molded components in multiple cavity injection molding systems. A corresponding multiple cavity injection molding system utilizing the noted runner system is described. And, a related method for promoting uniform filling of multiple mold cavities is also disclosed.
摘要:
Plugs (20) that can be removed and that are made in two parts are used to close off channel sections in a hot-channel distributor (10); these are arranged so as to subtend an acute angle &agr; with the principal axis (A) of a channel (15) that can be charged with a plastified mass. A continuous sealing edge of the face surface (30) of these is pressed onto a continuous annular surface (40) that encloses an opening (42) to the channel (15). The angle &agr; lies between 40° to 45°. The plug (20) incorporates a pressure piece (26) that is located in front of a screw body (22) that can be screwed into an inclined bore (16) that opens out into area of the channel in the distributor (10) that is to be sealed off. At the sealing edge (31), the face surface (30) of the plug is flat, although it can be concavely curved inward or be crowned (32), much like a segment of a sphere, the diameter of which is defined by the diameter of the smallest radius of the sealing edge (31). The outer annular surface (40), which is circularly restricted, can be arranged on an elbow (38) at which the channel (15) makes the transition to become a branch of the distributor (10). In a through channel (15) with a series of branches (34) selected sections (36), the ends of which have annular surface (40) that are inclined opposite to each other, can be closed off by the associated plugs (20).
摘要:
A single piece battery jaw and method and apparatus for producing the same employs a stack molding type machine with material injection from the platens. The apparatus can effectively injection mold a one-piece jar with a straight side wall or an undercut side wall. Zero draft capability is also provided. The apparatus also includes an extraction device and core stabilizers.
摘要:
An injection-molding half-mold has a base plate (1), a nozzle-carrying plate (2), a cavity-carrying plate (3), and a hot runner (4) to which there are associated a plurality of resistive elements (6) connected externally to a power supply source via at least an electric conductor (9, 19) lead connected to an appropriate external connector. The nozzle-carrying plate (2) can be removed from the hot runner (4) without any need for either the electric conductor lead (9, 19) or the connections of the latter to the resistive elements (6) to be disconnected
摘要:
An improved melt distribution system and method is provided for a multi-level stack mold having three or more moving platens. The injection machine communicates with a bifurcated sprue bar for providing pressurized melt through the first moving platen to a central distribution manifold in the second moving platen. From the central distribution manifold, the flow of pressurized melt is distributed to the first and third platens for transfer to a plurality of mold cavities.