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Production process of IPET thickened container

A production process and container technology, which is applied in the field of IPET thickened container production process, can solve the problems of unstable standing, uneven wall thickness, and poor gloss of IPET bottles, and achieve stable standing, uniform wall thickness, and good gloss Effect

Pending Publication Date: 2021-05-18
上海川禾包装容器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a production process for IPET thickened containers, which solves the problems of uneven wall thickness, unstable standing, and poor luster of IPET bottles when the wall thickness of IPET thickened containers exceeds 8mm. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of IPET thickening container production technology, it comprises the following steps:

[0017] (1) Dry the IPET plastic particles with a drying hopper at 60°C, dehumidify for 2 hours, and fully dry the IPET particles;

[0018] (2) After the dried IPET particles enter the injection molding machine from the drying hopper, they are fully mixed and melted by the screw mixer of the injection molding machine at a temperature of 220°C, and then molded using 120MPA high pressure and 45mm / s low speed technology. , to obtain preforms; the screw mixer is an extrusion device integrated with a mixer at the screw head (extrusion end), and the raw materials are fully mixed and extruded in the mixer cavity, which can melt the raw materials more uniformly. The screw part of the screw mixer is composed of two parallel C-shaped screw shells symmetrically assembled to form a parallel twin-screw extrusion equipment.

[0019] (3) Put the preform into the blow molding machine to posit...

Embodiment 2

[0021] A kind of IPET thickening container production technology, it comprises the following steps:

[0022] (1) Dry the IPET plastic particles with a drying hopper at 60°C, dehumidify for 2 hours, and fully dry the IPET particles;

[0023] (2) After the dried IPET particles enter the injection molding machine from the drying hopper, they are fully mixed and melted by the screw mixer of the injection molding machine at a temperature of 220°C, and molded by using 120MPA high pressure and 50mm / s low speed technology for injection molding , get the preform;

[0024] (3) Put the preform into the blow molding machine to position the embryo head, and the blow molding machine runs to heat up. When the preform enters the front mold of the blow molding machine, the embryo head is automatically positioned, and the pressure of the blow molding high-pressure gas is set. Set it to 36kg, set the action pressure to 8kg, set the cooling temperature to 16°C, set the mold cycle pressure to 5kg...

Embodiment 3

[0026] A kind of IPET thickening container production technology, it comprises the following steps:

[0027] (1) Dry the IPET plastic particles with a drying hopper at 60°C, dehumidify for 2 hours, and fully dry the IPET particles;

[0028] (2) After the dried IPET particles enter the injection molding machine from the drying hopper, they are fully mixed and melted by the screw mixer of the injection molding machine at a temperature of 220°C, and molded by using 120MPA high pressure and 50mm / s low speed technology for injection molding , get the preform;

[0029] (3) Put the preform into the blow molding machine to position the embryo head, and the blow molding machine runs to heat up. When the preform enters the front mold of the blow molding machine, the embryo head is automatically positioned, and the pressure of the blow molding high-pressure gas is set. Set it to 32kg, set the action pressure to 7kg, set the cooling temperature to 16°C, set the mold cycle pressure to 4kg...

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Abstract

The invention discloses a production process of an IPET thickened container, and belongs to the technical field of plastic containers. The process comprises the following steps: (1) IPET particles are fully dried; (2) after the dried IPET particles enter an injection molding machine through a drying hopper, through a screw mixer of the injection molding machine, the dried IPET particles are fully mixed and molten at the temperature of 220 DEG C and put into a mold, and a bottle blank is obtained; and (3) the bottle blank is put into a bottle blowing machine to position a blank head, exhausting is performed after first-time blowing forming, and then second-time circulating blowing forming is performed to ensure that the product is not shrunk after being cooled, so as to obtain a finished product with the thickness of 8 mm or more. A screw is used for mixing before injection molding, a mixer is integrated at the head part of the screw, and the molten IPET is fully mixed when passing through the head part of the screw, so that the raw materials are molten more uniformly. Compared with single-time blowing, secondary circulating blowing is utilized, so that an IPET thick-wall bottle can be fully shaped, the wall thickness of a bottle body is kept uniform, the bottle body stands stably, and the bottle body has good gloss.

Description

technical field [0001] The invention relates to a production process of an IPET thickened container, belonging to the technical field of plastic containers. Background technique [0002] Plastic containers are hollow blow-molded containers, which are processed by hollow molding. There are open plastic barrels and cans and closed plastic barrels and cans. Open plastic barrels and cans are mainly used to hold solid chemicals, food, medicines, etc.; closed plastic barrels and cans are mainly used to hold liquid substances. It is lightweight, unbreakable, corrosion-resistant, and recyclable. At present, the plastic container made of IPET plastic particles, that is, the IPET container (bottle), has a thickness of 6mm. Making it thicker will result in uneven wall thickness, unstable standing, and poor gloss of the IPET bottle. Therefore, in the existing production process, the molding method is improved, and the wall thickness of the IPET bottle can reach more than 8mm by using ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C45/18B29C45/47B29C45/00B29C49/06B29C49/58B29L31/00
CPCB29C45/18B29C45/47B29C45/00B29C49/06B29C49/58B29L2031/7158B29C2045/0096B29C2049/023
Inventor 姚振雄江洪
Owner 上海川禾包装容器有限公司
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