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KR-102963141-B1 - Multiple layer blow forming system

KR102963141B1KR 102963141 B1KR102963141 B1KR 102963141B1KR-102963141-B1

Abstract

The objective of the present invention is to provide a multilayer blow molding system, wherein the configuration of the present invention is characterized by including at least two injection cylinders (120) for injecting molding material for blow molding, and a multilayer blow molding nozzle (130) for injecting blow molding material to form at least two or more layers.

Inventors

  • 송현빈

Assignees

  • 주식회사 유진팩토리

Dates

Publication Date
20260511
Application Date
20251121

Claims (6)

  1. At least two injection cylinders (120) for injecting molding material of a blow-molded product, and It includes a multilayer blow molding nozzle (130) that injects a blow molded product to be formed into at least two or more layers, and The multilayer blow molding nozzle (130) connected to at least two injection cylinders (120) is, An outer shell nozzle body (132) having a molding material injection hole (138) that is laterally connected to one of the injection cylinders (120) among the plurality of injection cylinders (120), and It includes at least two multilayer molding guide bodies (134) that are supported by the outer shell nozzle body (132), arranged in a concentric shape with the outer shell nozzle body (132), and have molding material injection holes (138) that are in communication with the remaining injection cylinders (120), excluding one injection cylinder (120) that is in communication with the molding material injection hole (138) of the outer shell nozzle body (132). A multilayer blow molding system characterized by being configured such that a stacking guide space (SPA) is secured between the outer shell nozzle body (132) and at least two of the multilayer molding guide bodies (134) and between at least two of the multilayer molding guide bodies (134) so that a molding material of a different material or a molding material of a different color is injected and guided to be stacked in multiple layers, thereby allowing the molding material to be molded into a multilayer molded injection product (100).
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  3. In paragraph 1, The injection cylinder (120) is composed of three injection cylinders (120) supported by a molding support die (110), and each cylinder-side molding material supply hole of the three injection cylinders (120) is in communication with each molding material injection hole (138) which is in communication with the side of the outer nozzle body (132) of the multilayer blow molding nozzle (130) and the inner and outer surfaces of at least two multilayer molding guide bodies (134). The above multilayer blow molding nozzle (130) is provided with an outlet at the bottom, and is configured so that the multilayer molded injection product (100) is ejected out through the outlet at the bottom outlet of the multilayer blow molding nozzle (130). The above-mentioned multilayer blow molding nozzle (130) further includes a cutting unit supported on a molding support die (110), and The above cutting unit is, A pair of left and right cutting support brackets (142) supported by a cutting moving device supported by the above-mentioned molding support die (110), and A multilayer blow molding system characterized by including a cutter (144) that is supported by the cutting support bracket (142) and positioned so that the blade part can cut the multilayer molded injection product (100) to a certain length.
  4. In paragraph 3, The device further includes a gripper unit for gripping the above-mentioned multilayer molded injection molded product (100), and The above gripper unit is, The above multilayer blow molding nozzle (130) comprises a grip support block (152) that moves by a grip moving device downwards toward the discharge port at the bottom end, and A multilayer blow molding system characterized by including a grip movable block (154) that moves back and forth by a forward and backward driving unit in a position facing the above-mentioned grip support block (152).
  5. In paragraph 3, The product further includes a product expansion forming unit that presses the upper part of the multilayer molded product (102) cut by the cutter (144) to form an expansion portion with a diameter larger than other parts on the upper part of the multilayer blow-molded product. The above-mentioned product expansion forming unit is, A multilayer blow molding system characterized by including an expansion forming push block according to the extension and retraction operation of the cylinder rod of a pressing operating cylinder (162) supported by the molding support die (110).
  6. In paragraph 5, The product further includes a transfer tray unit for transferring to the outside a multilayer molded product (102) in which an extension is formed on the upper part by the above-mentioned product extension forming unit. The above transfer tray unit is, A tray (172) into which the above-mentioned multilayer molded product (102) falls, and A transfer conveyor (174) installed to be connected to the above tray section (172), and A multilayer blow molding system characterized by including a plurality of product sorting spacing pieces (176) provided on the upper surface of the conveyor belt of the above-mentioned transfer conveyor (174).

Description

Multilayer blow forming system The present invention relates to a multilayer blow molding system, and more specifically, to a multilayer blow injection molding system that enables an inner layer and an outer layer to be formed of different materials or colors when manufacturing plastic containers such as cosmetic containers. Generally, blow molding is a processing method in which a parison, a material formed in an extruder, is fed into a mold and compressed air is blown in from the center to form a thin, hollow container. This blow molding is mainly used to make thin plastic containers using a soft material made by melting a thermoplastic resin called parison. At this time, as an injection blow molding method, a molding material such as a thermoplastic resin is blown and supplied from the material input side toward the injection blow molding nozzle, thereby causing an injection blow molded product to come out from the injection blow molding nozzle. However, conventionally, blow-molded products are formed in a single layer, so there is a problem that it is difficult to make multi-layer blow-molded products, and since a multi-layer blow-molded process must be performed to make multi-layer blow-molded products, there is also a problem that the labor cost increases and the unit cost of blow-molded products increases. FIG. 1 is a photograph showing an injection cylinder, which is a main part of a multilayer blow molding system according to the present invention. FIG. 2 is a photograph showing a part of the injection cylinder illustrated in FIG. 1 from the side. FIG. 3 is a front view photograph showing the structure of a multilayer blow molding nozzle, which is a main part of the multilayer blow molding system according to the present invention, and the state in which a multilayer molded injection product is injected out through the lower discharge port of the multilayer blow molding nozzle. FIG. 4 is an enlarged photograph of the multilayer blow molding nozzle, which is the main part shown in FIG. 3. FIG. 5 is a front view photograph showing the state in which a multilayer molded product is injected out through the lower discharge port of a multilayer blow molding nozzle, which is a main part of the multilayer blow molding system according to the present invention, and the state in which an expansion part forming push pin presses the upper part of the multilayer molded product, which is gripped by grip support blocks and grip movable blocks on both the left and right sides, to form an expansion part. FIG. 6 is a photograph showing the process of continuously injecting a multilayer molded injection product illustrated in FIG. 5. FIG. 7 is a photograph showing the process of the grip support block and the grip movable block on the left gripping the multilayer molded injection molded product illustrated in FIG. 6. FIGS. 8 to 10 are photographs showing the process of cutting the multilayer injection molded product illustrated in FIG. 7 by a cutter while the left grip support block and the grip movable block are gripping it. FIG. 11 is a photograph showing the state in which the multilayer molded injection molded part, cut in FIG. 10, is moved back to its original left position while being gripped by the left grip support block and the grip movable block. FIG. 12 is a photograph showing the process of forming an extension by pressing the upper part of a multilayer molded injection product with an extension forming push pin while the left grip support block and the grip movable block, which are the main parts of the present invention, grip and return to their original left position. FIG. 13 is a photograph showing the grip release state of a multilayer molded injection molded product by the grip support block and grip movable block of FIG. 12. FIG. 14 is an enlarged photograph showing the state in which a multilayer molded product is fitted into the extension forming push pin illustrated in FIG. 13. FIG. 15 is a photograph showing the state in which a multilayer molded product is removed from the expansion forming push pin of FIG. 14 and transported to a transfer conveyor. FIG. 16 is a photograph showing the upper portion of a multilayer molded product formed in multiple layers by a multilayer blow molding system according to the present invention. FIG. 17 is a cross-sectional view schematically showing the internal structure of a multilayer blow molding nozzle, which is a main part of a multilayer blow molding system according to the present invention. FIG. 18 is an enlarged view of section A of FIG. 17, FIG. 19 is a cross-sectional view schematically showing the modified internal structure of a multilayer blow molding nozzle, which is a main part of a multilayer blow molding system according to the present invention. FIG. 20 is a front view schematically showing the structure of a product removal blowing device and a moving drive cylinder for injecting pressure air from the side of a multilayer molded product fitte