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CN-121973400-A - Demoulding deformation prevention injection mold for automobile injection molding production

CN121973400ACN 121973400 ACN121973400 ACN 121973400ACN-121973400-A

Abstract

The invention relates to the technical field of injection molds and discloses an anti-demolding deformation injection mold for producing automobile injection molding parts, which comprises an upper mold, a lower mold arranged at the bottom of the upper mold, and an adjusting mechanism symmetrically arranged in the upper mold, wherein the adjusting mechanism comprises a shell arranged in the shell, a reducing hole arranged at the bottom of the shell, an inner ring channel arranged at the bottom of the shell and close to the reducing hole, an outer ring channel arranged at the outer side of the shell and close to the inner ring channel, ring grooves commonly arranged at the tops of the inner ring channel and the outer ring channel, double-flow channels symmetrically arranged at the tops of the ring grooves, a rotating block arranged in the ring grooves, worm wheels arranged at the edges of the tops of the rotating block, and a worm arranged at the position of the shell and close to the edges of the worm wheels. Through setting up adjustment mechanism, make the mould support the double-layered core and mould plastics and mix two kinds of mode switch of moulding plastics, satisfy different production scene demands to possess the inside and outside layer sequence adjustment function of two kinds of raw materials when the double-layered core is moulded plastics.

Inventors

  • HU WEIMIN

Assignees

  • 浙江星泰模塑科技股份有限公司

Dates

Publication Date
20260505
Application Date
20260409

Claims (8)

  1. 1. The anti-demolding deformation injection mold for the production of the automobile injection molding part comprises an upper mold (1) and a lower mold (2) arranged at the bottom of the upper mold (1), and is characterized by also comprising adjusting mechanisms (3) symmetrically arranged in the upper mold (1); The adjusting mechanism (3) comprises a shell (31) arranged in the shell (31), a reducing hole (32) formed in the bottom of the shell (31), an inner annular channel (33) formed in the bottom of the shell (31) and close to the reducing hole (32), an outer annular channel (34) formed in the outer side of the shell (31) and close to the inner annular channel (33), annular grooves (35) formed in the tops of the inner annular channel (33) and the outer annular channel (34), double-flow channels (36) symmetrically formed in the tops of the annular grooves (35), a rotating block (37) arranged in the annular grooves (35), a worm wheel (38) arranged at the edge of the top of the rotating block (37), a worm (39) arranged at the edge of the shell (31) and close to the worm wheel (38), double-straight channels (310) symmetrically formed in the position of the rotating block (37) and close to the double-flow channels (36), double-curved channels (311) symmetrically formed in the tops of the rotating block (37), a sealing unit arranged at the tops of the shell (31), and a telescopic unit arranged in the middle of the reducing hole (32); The double-flow channel (36) is composed of two channels, different injection molding raw materials flow in the two channels, when the double-flow channel (36) is aligned with the double straight channel (310), raw materials in the channel close to the reducing hole (32) flow into the inner loop (33) through the double straight channel (310), raw materials in the channel far away from the reducing hole (32) flow into the outer loop (34), and when the double-flow channel (36) is aligned with the double-curved channel (311), raw materials in the channel close to the reducing hole (32) flow into the outer loop (34), and raw materials in the channel far away from the reducing hole (32) flow into the inner loop (33).
  2. 2. The injection mold for producing an injection molding of an automobile according to claim 1, wherein the double straight channels (310) are formed by two perpendicular round holes, the double curved channels (311) are formed by two spiral curved holes, and an included angle between the double straight channels (310) and the double curved channels (311) is ninety degrees.
  3. 3. The injection mold for producing the automobile injection molding part, which is characterized in that a short shaft is arranged at the lower part of the outer wall of the rotating block (37), an arc-shaped groove is formed in the side wall of the annular groove (35), and the outer wall of the short shaft is in sliding connection with the arc-shaped groove.
  4. 4. The injection mold for producing an injection molded article of an automobile according to claim 1, wherein the closing unit comprises a screw groove (312) formed in the top of the housing (31), a knob (313) formed in the screw groove (312), tie rods (314) symmetrically formed at the bottoms of the knob (313), and a sleeve (315) fixedly formed at the bottoms of the two tie rods (314).
  5. 5. The injection mold for producing an injection molded article of an automobile according to claim 4, wherein the inner wall of the screw groove (312) is provided with a screw thread, a screw hole penetrating to the bottom is formed in the top of the knob (313), and the inner wall of the screw hole is in threaded connection with the inner wall of the screw groove (312).
  6. 6. The injection mold for producing an injection molded article of an automobile according to claim 4, wherein the bottom of the knob (313) is provided with a limit groove, and the top end of the pull rod (314) is in adaptive sliding connection with the limit groove.
  7. 7. The injection mold for producing the injection molding of the automobile, which is characterized in that the telescopic unit comprises a lifting rod (316) arranged in the middle of the reducing hole (32), a mixed flow bolt (317) arranged at the bottom end of the lifting rod (316), and a tension spring (318) arranged at the top of the lifting rod (316), wherein the top and the bottom of the tension spring (318) are fixedly connected with the mixed flow bolt (317) and the inner wall of the reducing hole (32) respectively.
  8. 8. The injection mold for producing an injection molding of an automobile according to claim 7, wherein a slide block is arranged at the top of the lifting rod (316), a slide groove is formed in the inner wall of the top of the reducing hole (32), and the outer wall of the slide block is in sliding connection with the inner wall of the slide groove.

Description

Demoulding deformation prevention injection mold for automobile injection molding production Technical Field The invention relates to the technical field of injection molds, in particular to an anti-demolding deformation injection mold for producing automobile injection molding parts. Background The anti-demolding deformation injection mold plays a vital role in automobile production, and has the core effect of guaranteeing high quality and high precision of inner and outer ornaments of an automobile. The problems of product warpage, scratches and deformation caused by demolding stress in the traditional mold are effectively solved by optimizing the demolding mechanism and the cooling system, and the dimensional stability and the surface smoothness of key components such as an instrument board, a door plate, a bumper and the like are ensured. The assembly precision and the appearance texture of the whole automobile are directly improved, the assembly difficulty and the reworking cost caused by unqualified parts are reduced, the one-step molding qualification rate is improved, and the production efficiency is remarkably improved. In addition, the method provides process guarantee for the light weight and complex structural design of the automobile, ensures that the integrated and thinned parts can be stably produced in quantity, and is a key technical support for promoting the automobile manufacturing to develop to precision and high efficiency. The conventional mold is widely used in the plastic molding field, but due to the limitations of the structure and the working principle, some non-negligible problems often exist. Mainly at two core levels. First, conventional molds typically rely on a fixed runner design for sequential switching of the inner and outer layer materials, which, once set, is difficult to flexibly adjust. When the production requirement is changed from 'material A is skin, material B is core' to 'material B is skin, material A is core', complex mechanical transformation or core component replacement is often required to be carried out on the die, the process is time-consuming and labor-consuming, and the flexible production efficiency of multiple varieties and small batches is seriously influenced. Secondly, on the switching of sandwich injection molding and mixed injection molding mode, the bottleneck of the existing mold is more prominent. The core-in-mold type requires that the two materials form a clear sheath-core structure in the mold cavity, while the hybrid mode requires that the multiple materials be fully fused. These two distinct processes are diametrically opposed to the requirements for flow channel control, injection timing and pressure matching. The mechanical structure of the traditional die cannot be considered, so that the mode is switched like a set of brand new equipment is replaced, and a large amount of shutdown and debugging are needed. The rigidity design greatly limits the universality of the die, so that the die cannot quickly respond to the diversified requirements of the market on the combination of material properties, and the die becomes a technical barrier for restricting the development of the injection molding process to higher flexibility and functionality. Disclosure of Invention In view of the problems in the prior art that the injection mold is inconvenient in adjusting the sequence of inner and outer raw materials and cannot be compatible with sandwich injection molding and mixed injection molding, the anti-demolding deformation injection mold for producing the automobile injection molding is provided. The injection mold is capable of switching between sandwich injection molding and mixed injection molding, and has the function of changing the sequence of inner and outer layers of different raw materials during sandwich injection molding. The technical scheme of the invention is that the anti-demolding deformation injection mold for producing the automobile injection molding part comprises an upper mold, a lower mold arranged at the bottom of the upper mold and adjusting mechanisms symmetrically arranged in the upper mold; The adjusting mechanism comprises a shell, an inner ring channel, an outer ring channel, ring grooves, double channels, a rotating block, worm wheels, a worm, double straight channels, a hyperbolic channel and a telescopic unit, wherein the shell is arranged in the shell, the diameter-changing hole is formed in the bottom of the shell, the inner ring channel is formed in the bottom of the shell, the outer ring channel is formed in the outer side of the inner ring channel, the ring grooves are formed in the tops of the inner ring channel and the outer ring channel, the double channels are symmetrically formed in the tops of the ring grooves, the rotating block is arranged in the ring grooves, the worm wheels are arranged at the edge of the top of the rotating block, the worm is arranged in the position, close to the edge of the worm