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Polyethylene terephthalate (PET) bottle cap production technique

A production process and technology of bottle caps, applied in the direction of coating, etc., can solve the problems of difficult processing and production of PET bottle caps

Inactive Publication Date: 2016-04-06
TIANJIN XUANYU PACKAGING PROD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a PET bottle cap production process in order to solve the technical problem that PET bottle caps are difficult to process and produce

Method used

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  • Polyethylene terephthalate (PET) bottle cap production technique
  • Polyethylene terephthalate (PET) bottle cap production technique

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Such as figure 1 As shown, the present embodiment provides a PET bottle cap production process, comprising the following steps:

[0025] The first step: loading.

[0026] Turn on the automatic feeding machine, automatic feeding.

[0027] Step 2: Dry and preheat.

[0028] Open the oven, raise the oven temperature to 130°C, dry and preheat for 4 hours.

[0029] Step 3: Install the beryllium bronze mold.

[0030] Install the beryllium bronze mold; as figure 2 As shown, both the die and the punch of the beryllium bronze mold are composed of two layers. Similarly, it is divided into the punch mold steel layer 4 not in contact with the bottle cap and the punch beryllium bronze layer 3 in contact with the bottle cap.

[0031] The fourth step: parameter setting.

[0032] The barrel temperature of the injection molding machine is set at 270°C for the first stage, 280°C for the second stage, 285°C for the third stage, and 290°C for the fourth stage; the mold clamping and ...

Embodiment 2

[0038] Such as figure 1 As shown, the present embodiment provides a PET bottle cap production process, comprising the following steps:

[0039] The first step: loading.

[0040] Turn on the automatic feeding machine, automatic feeding.

[0041] Step 2: Dry and preheat.

[0042] Open the oven, raise the oven temperature to 170°C, dry and preheat for 3 hours.

[0043] Step 3: Install the beryllium bronze mold.

[0044] Install the beryllium bronze mold; as figure 2 As shown, both the die and the punch of the beryllium bronze mold are composed of two layers. Similarly, it is divided into the punch mold steel layer 4 not in contact with the bottle cap and the punch beryllium bronze layer 3 in contact with the bottle cap.

[0045] The fourth step: parameter setting.

[0046] The barrel temperature of the injection molding machine is set to 280°C for the first stage, 290°C for the second stage, 295°C for the third stage, and 295°C for the fourth stage; the mold clamping and ...

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PUM

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Abstract

The invention provides a polyethylene terephthalate (PET) bottle cap production technique to solve the problem that the PET bottle caps are difficult to produce. The technique comprises the following steps of feeding, drying and preheating, beryllium bronze mold installation, parameter setting, heating, injection molding and shape trimming. According to the production technique, PET raw materials are preheated before entering a charging barrel of an injection molding machine, and therefore it is guaranteed that the temperature of the PET raw materials reaches the ideal value before injection molding; a beryllium bronze mold good in heat conductivity is adopted, and thus it is guaranteed that the mold is completely filled and demolding can be conducted smoothly; in addition, proper technological parameters are adopted, and the PET bottle caps high in quality and finished product rate are produced.

Description

technical field [0001] The invention belongs to the technical field of raw material processing, in particular to a PET bottle cap production process. Background technique [0002] Polyethylene terephthalate (polyethyleneterephthalate), referred to as PET, is the most important variety of thermoplastic polyester. Products made of PET materials have many advantages: good mechanical properties, high impact strength, and good folding resistance; oil resistance, fat resistance, dilute acid resistance, dilute alkali resistance, and most solvent resistance; excellent high and low temperature resistance. It can be used for a long time in the temperature range of 120°C, short-term use can withstand high temperature of 150°C, and can withstand low temperature of -70°C, and the mechanical properties of high and low temperature have little effect on it; gas and water vapor permeability is low, that is, it has excellent Gas, water, oil and odor resistance; high transparency, can block u...

Claims

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Application Information

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IPC IPC(8): B29C45/00B29C45/76B29C45/77B29C45/78
Inventor 史明珠
Owner TIANJIN XUANYU PACKAGING PROD