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CN-224224419-U - Injection mold for back plate of automobile seat

CN224224419UCN 224224419 UCN224224419 UCN 224224419UCN-224224419-U

Abstract

The utility model relates to the technical field of injection molds and discloses an injection mold for a back plate of an automobile seat, which comprises a lower mold and an upper mold, wherein a guide rod is fixedly connected to the top of the lower mold, the inner wall of the lower mold is penetrated and is in sliding connection with a thimble, a loosening mechanism is arranged in the lower mold, a discharging mechanism is arranged at the top of the lower mold, the loosening mechanism comprises a spool, the spool is fixedly connected to the bottom end of the thimble, a spring is fixedly connected to the top of the spool, the inner wall of the spool penetrates and is rotationally connected with a rotating rod, one end of the rotating rod is fixedly connected with a reed, one end of the reed, which is far away from the rotating rod, is fixedly connected with a steel ball, and the other end of the rotating rod is fixedly connected with a gear. According to the utility model, through the arrangement of the loosening mechanism, the ejector pin can generate high-frequency micro-amplitude vibration before the ejector pin lifts the product, so that the molecular adsorption force between the product and the top end of the ejector pin is destroyed, the product is effectively prevented from being adhered, the demolding quality of the product is improved, and the production yield of the product is improved.

Inventors

  • ZHI JIANMING

Assignees

  • 太仓丹妮尔模塑汽配有限公司

Dates

Publication Date
20260512
Application Date
20250611

Claims (8)

  1. 1. The injection mold for the automobile seat back plate comprises a lower mold (1) and an upper mold (2) and is characterized in that a guide rod (3) is fixedly connected to the top of the lower mold (1), the inner wall of the lower mold (1) penetrates through and is slidably connected with a thimble (4), a loosening mechanism (5) is arranged in the lower mold (1), and a blanking mechanism (6) is arranged at the top of the lower mold (1); The loosening mechanism (5) comprises a spool (51), the spool (51) is fixedly connected to the bottom end of the ejector pin (4), a spring (52) is fixedly connected to the top of the spool (51), a rotating rod (53) is connected to the inner wall of the spool (51) in a penetrating mode, a reed (54) is fixedly connected to one end of the rotating rod (53), a steel ball (55) is fixedly connected to one end of the reed (54) away from the rotating rod (53), a gear (56) is fixedly connected to the other end of the rotating rod (53), a cylinder (57) is fixedly connected to the inner wall of the lower die (1), a top plate (58) is fixedly connected to the piston end of the cylinder (57), and a rack (59) meshed with the gear (56) is fixedly connected to the upper surface of the top plate (58).
  2. 2. The injection mold for the back plate of the automobile seat, as set forth in claim 1, characterized in that the blanking mechanism (6) comprises a push plate (61), a slide bar (62) is fixedly connected to the bottom of the push plate (61), and the slide bar (62) is slidably connected to the top side wall of the lower mold (1).
  3. 3. The injection mold for the back plate of the automobile seat according to claim 2, wherein a handle (63) is fixedly connected to one end of the sliding rod (62) away from the push plate (61).
  4. 4. The injection mold for the back plate of the automobile seat according to claim 1, wherein the spring (52) is sleeved on the outer wall of the thimble (4), and the top end of the spring (52) is fixedly connected to the top of the inner wall of the lower mold (1).
  5. 5. The injection mold of the back plate of the automobile seat, as set forth in claim 1, wherein the steel ball (55) is located inside the spool (51) and is attached to the inner wall of the spool (51).
  6. 6. The injection mold for a back plate of an automobile seat according to claim 1, wherein the top plate (58) is slidably connected to an inner wall of the lower mold (1).
  7. 7. An injection mold for a back plate of an automobile seat according to claim 3, wherein the push plate (61) is located on the right side of the lower mold (1), and the handle (63) is located on the left side of the lower mold (1).
  8. 8. The injection mold for the back plate of the automobile seat according to claim 1, wherein the upper mold (2) penetrates through and is connected with the outer wall of the guide rod (3) in a sliding manner.

Description

Injection mold for back plate of automobile seat Technical Field The utility model relates to the technical field of injection molds, in particular to an injection mold for a back plate of an automobile seat. Background The injection mould is a key tool for batch manufacturing of plastic products in industrial production, and generally consists of an upper mould, a lower mould, a mould cavity, a pouring system, an ejection mechanism and the like. In the injection molding production of automobile seat back plates, products are required to be demolded from a lower die after being molded, and most of injection molds at present generally adopt a mode that a thimble mechanism arranged in the lower die is utilized to eject the solidified back plates out of a die cavity through upward movement of thimbles. In the injection molding process, the plastic softened at high temperature is extremely easy to physically adsorb with the top end of the ejector pin, so that a molded product is adhered to the end part of the ejector pin after being ejected, inconvenience is brought to the ejection of the product, if forced separation by brute force is adopted, scratches which are difficult to repair are left on the surface of the product, structural deformation is caused or too deep ejector pin marks are formed, defective products are caused, reworking repair cost is greatly increased, the overall production yield is remarkably reduced, and an automobile seat backboard injection mold is provided for solving the problems. Disclosure of utility model In order to make up for the defects, the utility model provides an injection mold for a back plate of an automobile seat, which aims to solve the problem that the ejector pins in the prior art eject products and simultaneously the products are easy to adhere to the top ends of the ejector pins, so that inconvenience is brought to product demolding. In order to achieve the aim, the injection mold for the automobile seat back plate comprises a lower mold and an upper mold, wherein the top of the lower mold is fixedly connected with a guide rod, the inner wall of the lower mold penetrates through and is connected with a thimble in a sliding manner, a loosening mechanism is arranged in the lower mold, and a discharging mechanism is arranged at the top of the lower mold; The loosening mechanism comprises a spool, the spool is fixedly connected to the bottom end of a thimble, a spring is fixedly connected to the top of the spool, the inner wall of the spool penetrates through and rotates to be connected with a rotating rod, one end of the rotating rod is fixedly connected with a reed, one end of the reed, which is far away from the rotating rod, is fixedly connected with a steel ball, the other end of the rotating rod is fixedly connected with a gear, an air cylinder is fixedly connected to the inner wall of the lower die, a top plate is fixedly connected to the piston end of the air cylinder, and a rack meshed with the gear is fixedly connected to the upper surface of the top plate. As a further description of the above technical solution: The blanking mechanism comprises a push plate, wherein a slide rod is fixedly connected to the bottom of the push plate and is slidably connected to the top side wall of the lower die. As a further description of the above technical solution: One end of the sliding rod, which is far away from the push plate, is fixedly connected with a handle. As a further description of the above technical solution: The spring is sleeved on the outer wall of the thimble, and the top end of the spring is fixedly connected to the top of the inner wall of the lower die. As a further description of the above technical solution: The steel ball is positioned in the spool and attached to the inner wall of the spool. As a further description of the above technical solution: The top plate is connected to the inner wall of the lower die in a sliding manner. As a further description of the above technical solution: the push plate is positioned on the right side of the lower die, and the handle is positioned on the left side of the lower die. As a further description of the above technical solution: the upper die penetrates through and is connected to the outer wall of the guide rod in a sliding mode. The utility model has the following beneficial effects: 1. According to the utility model, through the arrangement of the loosening mechanism, the ejector pin can generate high-frequency micro-amplitude vibration before the ejector pin lifts the product, so that the molecular adsorption force between the product and the top end of the ejector pin is destroyed, the product is effectively prevented from being adhered, the demolding quality of the product is improved, and the production yield of the product is improved. 2. According to the utility model, the push plate can be driven to move above the lower die by pulling the slide bar through the handle, after the ejector pin ejects th