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CN-224224450-U - Efficient back mould mechanism of loosing core

CN224224450UCN 224224450 UCN224224450 UCN 224224450UCN-224224450-U

Abstract

The utility model relates to the technical field of die manufacturing, and particularly discloses a high-efficiency rear die core pulling mechanism which comprises a front die, a rear die and a synchronizing device, wherein the rear die comprises a rear die plate, a carrier plate, equal-height screws, a thimble panel, a thimble bottom plate, grooves and through holes, the synchronizing device comprises a synchronizing push rod, a synchronizing fixing block and a synchronizing button machine, the equal-height screws penetrate through the through holes of the rear die plate to be in threaded connection with the carrier plate, the synchronizing push rod is used for fixing the thimble panel and two ends of the thimble bottom plate through threaded connection, the synchronizing fixing block is used for being in threaded connection with the carrier plate, and the synchronizing button machine is installed in the grooves at two ends of the rear die plate and can move in the grooves. The utility model adopts various structural improvement designs, including arranging the synchronizing device and improving the rear template and the base plate, and introducing the contour screws with the limiting function, so that the rear mould core-pulling mechanism can adapt to complex product structures, improve core-pulling precision and efficiency, reduce mould cost and is easy to maintain, and can meet urgent demands of injection moulding industry.

Inventors

  • HUANG WEI
  • Wen Yuehong
  • CHENG CHAN

Assignees

  • 东莞川鹏塑料有限公司

Dates

Publication Date
20260512
Application Date
20250509

Claims (6)

  1. 1. A high-efficiency rear die core pulling mechanism is characterized by comprising a front die (1), a rear die (2) and a synchronizing device (3), wherein the rear die (2) comprises a rear die plate (201), a carrier plate (202), equal-height screws (203), a thimble panel (205), a thimble bottom plate (206), grooves (210) and through holes (211), the synchronizing device (3) comprises a synchronizing push rod (301), a synchronizing fixing block (302) and a synchronizing button machine (303), the equal-height screws (203) penetrate through the through holes (211) of the rear die plate (201) to be in threaded connection with the carrier plate (202), the synchronizing push rod (301) is used for fixing two ends of the thimble panel (205) and the thimble bottom plate (206) through threaded connection, and the synchronizing button machine (303) is installed in the grooves (210) at two ends of the rear die plate (201) and can move in the grooves.
  2. 2. The back mold core pulling mechanism according to claim 1, wherein a clearance space is reserved below the concave surface of the through hole (211) and the head of the contour screw (203), and 4 through holes (211) and 4 contour screws (203) are respectively arranged.
  3. 3. The back mold core pulling mechanism according to claim 1, wherein a compression spring is arranged between the synchronous button machine (303) and the groove (210), a concave hole (3032) is formed in the contact end of the synchronous button machine (303) and the compression spring, one end of the compression spring is inserted into the concave hole (3032) to be fixed, and the other end of the compression spring is in contact with the bottom end surface of the groove (210).
  4. 4. The back mold core pulling mechanism of claim 3, wherein a synchronous button machine inclined surface (3031) is arranged at the upper end of the synchronous button machine (303), the synchronous button machine inclined surface (3031) extends out of the groove (210), and the distance between the end surface of the concave hole (3032) of the synchronous button machine (303) and the bottom of the groove (210) is greater than the distance between the synchronous button machine inclined surface (303) and the groove (210).
  5. 5. The back mold core pulling mechanism of claim 1, wherein a synchronous fixed block guide groove (3021) matched with the synchronous push rod (301) is arranged in the middle of the synchronous fixed block (302), a synchronous fixed block inclined surface (3022) is arranged at the upper end of the synchronous fixed block (302), and a screw hole is formed in one end, close to the carrier plate (202), of the synchronous fixed block guide groove (3021).
  6. 6. The back mold core pulling mechanism according to claim 1, wherein the back mold (2) further comprises a core pulling insert (204), a return pin (208), a reset block (209) and a reset spring (207), the core pulling insert (204) is inlaid and fixed in the carrier plate (202), the return pin (208) and the reset block (209) are inlaid above the back mold plate (201), and the reset spring (207) is arranged on four guide posts of the thimble panel (205).

Description

Efficient back mould mechanism of loosing core Technical Field The utility model relates to the technical field of mold manufacturing, in particular to a high-efficiency back mold core-pulling structure for a plastic mold. Background In the field of mould manufacturing, the design and production process of plastic moulds play a decisive role in the quality and production efficiency of plastic products. The rear mould core-pulling mechanism is used as a key part in the plastic mould, and the performance quality of the rear mould core-pulling mechanism directly influences the molding quality of a product and the service life of the mould. Early plastic mold back mold core pulling technology is simple, and most of the back mold core pulling technology adopts a single core pulling mode and cannot cope with plastic products with complex structures. For example, when producing small-size plastic toys, because there is simple back-off structure on the toy, traditional mechanism of loosing core relies on simple slider to loose core, and the circumstances of product back-off department strain often appears when loosing core, leads to obvious flaw to appear in the product outward appearance, and the rejection rate is up to 10% -15%. The production cost is increased, and the production efficiency is seriously affected by frequent reworking of defective products. With advances in technology and diversification of market demands, the structure of plastic products is becoming more and more complex. Taking the production of plastic parts of automobile interior decoration as an example, the product has complex characteristics such as multiple back-off and special-shaped bulges. When the traditional core pulling mechanism is used for production, the problem is more remarkable, the product cannot be demoulded locally due to the fact that core pulling is not in place, the product is seriously deformed due to forced demoulding, and the rejection rate of the product is increased to 20% -30%. The method not only greatly increases the production cost of enterprises, but also influences the cooperation relationship with automobile manufacturers because qualified products cannot be delivered on time. To solve these problems, improved core pulling techniques have been developed in the industry. For example, some molds employ hydraulically driven core back devices in an attempt to improve the stability and accuracy of the back core. However, when the electronic equipment shell with a precise internal structure is produced, the improvement scheme only simply repairs the original structure, and the core pulling problem of the product with the complex structure cannot be fundamentally solved. Although the situation of product strain is reduced to a certain extent, the complexity of the hydraulic system increases the manufacturing cost of the die, the maintenance difficulty is greatly improved, and once the failure occurs, the maintenance time is long, so that the production progress is seriously affected. In addition, the existing core pulling mechanism has defects in the aspect of cooperative work with other parts of the die, and high-efficiency and stable production cycle cannot be realized. Disclosure of utility model The utility model aims to provide a high-efficiency back mold core pulling mechanism, which is provided with a synchronous device and an improvement on a back mold plate and a base plate through various structural improvement designs, and a contour screw with a limiting function is introduced, so that the back mold core pulling mechanism can adapt to a complex product structure, improve core pulling precision and efficiency, reduce mold cost and is easy to maintain so as to meet urgent demands of injection molding industry. In order to achieve the above purpose, the present utility model provides the following technical solutions: The utility model provides a efficient back mould mechanism of loosing core, includes front mould, back mould, synchronizer, and wherein the back mould includes back template, carrier plate, contour screw, thimble panel, thimble bottom plate, recess, through-hole, synchronizer includes synchronous push rod, synchronous fixed block, synchronous button machine, contour screw passes back template through-hole and carrier plate threaded connection, synchronous push rod passes through threaded connection fixed thimble panel and thimble bottom plate both ends, synchronous fixed block passes through threaded connection carrier plate, synchronous button machine is installed in the recess at back template both ends and can be in the activity therein. A clearance space is reserved below the concave surface of the through hole and the head part of the equal-height screw, and 4 through holes and 4 equal-height screws are respectively arranged. A compression spring is arranged between the synchronous button machine and the groove, a concave hole is formed in the contact end of the synchronous button machin