Core pulling mechanism used for reaction injection mold
A technology of injection molding and core-pulling mechanism, applied in the field of core-pulling mechanism, can solve problems such as affecting core-pulling effect, affecting yield, product flash, etc., achieving the effects of low maintenance cost, prolonging service life and avoiding jamming
Inactive Publication Date: 2017-05-31
CHANGSHA JINLOU MACHINERY TECH
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Problems solved by technology
The existing core-pulling mechanism is applied to the reaction injection molding mold, which not only easily causes flashing on the product, which affects the yield, but also easily forms sticking, which affects the core-pulling effect
Method used
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[0014] Such as figure 1 with figure 2 The shown core-pulling mechanism for the reaction injection molding mold includes a first fixed plate 2 connected to the mold core 1; a first fixed block 3 and a second fixed block 4 respectively connected to both ends of the first fixed plate 2 The two ends are respectively connected with the second fixed plate 5 of the first fixed block 3 and the second fixed block 4 away from the end of the first fixed plate 2; with the first fixed plate 2, the first fixed block 3, the second fixed plate 5 1. The core 6 that is slidably connected to the cavity surrounded by the second fixed block 4; at least two are connected with the first fixed plate 2 and the second fixed plate 5, and guide chute 7 for the sliding of the core 6; connected with the core 6 , the hydraulic cylinder or air cylinder 8 that drives the core 6 to slide; the sealing groove 9 that is arranged on the contact surface between the core 6 and the first fixed plate 2, the first fi...
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A core pulling mechanism used for a reaction injection mold comprises a first fixing plate connected with a mold insert, a first fixing block, a second fixing block, a second fixing plate, a mold cavity, at least two guide sliding grooves, a hydraulic oil cylinder or air cylinder, a seal groove, a seal ring and a positioning pin. The first fixing block and the second fixing block are connected with the two ends of the first fixing plate, the tow ends of the second fixing plate are connected with the ends, away from the first fixing plate, of the first fixing block and the second fixing block, the mold core is in sliding connection with a cavity defined by the first fixing plate, the first fixing block, the second fixing plate and the second fixing block, the guide sliding grooves are connected with the first fixing plate and the second fixing plate and allow the mold core to slide, the hydraulic oil cylinder or air cylinder is connected with the mold core and drives the mold core to slide, the seal groove is formed in the face where the mold core makes contact with the first fixing plate, the first fixing block, the second fixing plate and the second fixing block, the seal ring is embedded in the seal groove, and the positioning pin is connected with the mold core and ensures that during mold assembly, the mold core can be accurately positioned.
Description
technical field [0001] The invention relates to the technical field of reaction injection molding molds, in particular to a core-pulling mechanism for reaction injection molding molds. Background technique [0002] Reaction Injection Molding (RIM for short), an industrial molding process. An injection molding method that has chemical reactions during the molding process. The raw materials used in this method are not polymers, but two or more liquid monomers or prepolymers are added to the mixing head in a certain proportion. Mix evenly under pressure, inject it into a closed mold immediately, polymerize and solidify in the mold, and shape it into a product. Since the raw material used is liquid, the mold cavity can be quickly filled with a small pressure, so the clamping force and mold cost are reduced, and it is especially suitable for the production of large-area parts. [0003] RIM was first used only for polyurethane materials. With the advancement of technology, RIM c...
Claims
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IPC IPC(8): B29C45/33
CPCB29C45/33B29C45/332B29C45/0025
Inventor 赵真王福嵩刘敏谢华林马致敏
Owner CHANGSHA JINLOU MACHINERY TECH