Bottle embryo glue melting injection molding process

A technology for melting glue and preforms, which is applied to household appliances, hollow objects, other household appliances, etc., can solve the problems of high cost, inability to carry out large-scale promotion, and expensive injection molding machines, so as to expand the scope of blank supply and enhance research and development. ability, improve the effect of the injection molding process

Pending Publication Date: 2018-09-04
GUANG DONG XING LIAN PRECISE MACHINERY
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Problems solved by technology

At present, although some relatively good test workshops in China can achieve more than 0.80dL / g, they use a high-speed + external cooling injection molding machine to solve this problem. This injection molding machine is expensive and costly, and cannot be used on a large scale. to promote

Method used

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  • Bottle embryo glue melting injection molding process
  • Bottle embryo glue melting injection molding process
  • Bottle embryo glue melting injection molding process

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Embodiment Construction

[0025] refer to Figure 1 to Figure 4 , a preform melt plastic injection molding process provided in this embodiment comprises the following steps:

[0026] Step 1, prepare the processing site and the injection molding machine, the processing site is a conventional processing workshop, a plurality of dehumidifiers are set around the processing site, so that the humidity of the processing site is below 35%, preferably 33%, and the processing site The temperature is consistent with the temperature of the cooling water of the injection molding machine, and the temperature of the cooling water is between 15°C and 33°C, preferably 19°C;

[0027] Step 2, prepare the raw material, the raw material is PET raw material, the Chinese of PET raw material is polyethylene terephthalic acid plastic, its molecular structure is highly symmetrical, has certain crystallization orientation ability, has higher film-forming property and forming property; Use a dryer to dry the PET raw material so ...

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Abstract

The invention discloses a bottle embryo glue melting injection molding process. The process comprises the following steps: step I, preparing a processing site and an injection molding machine, whereinthe humidity of the processing site is below 35%; step II, preparing a raw material which is a PET raw material, and drying the PET raw material to enable the moisture content thereof to be 0.03% orbelow, wherein, the temperature is between 150 DEG C and 165 DEG C during drying, and drying time is more than 6 hours; step III, putting the raw material into the injection molding machine to carry out glue melting and injection molding, wherein the glue melting temperature in the injection molding machine is 258-262 DEG C, the glue melting revolving speed is 150-160rpm, the glue melting pressureis 50-60bar, the injection molding cycle is 29-30s, and the cooling time is 8-9s; and step IV, taking out a bottle embryo by using a mechanical arm after completing mold injection. By new methods such as adjusting the processing site environment and improving the injection molding process, based on adopting a common injection molding machine, the intrinsic viscosity of a CSD bottle embryo is 0.80dL/g or above, so that the embryo supplying range of a corporate is enlarged, and the research and development capacity of the corporate is increased.

Description

technical field [0001] The invention relates to a preform processing technology, in particular to a preform melt plastic injection molding process. Background technique [0002] CSD preforms are the prototypes of carbonated beverage bottles. In the preform mold production industry, when using general-purpose injection molding machines, very few factories can achieve the intrinsic viscosity of CSD preforms above 0.80dL / g, and the common one is 0.75. Between -0.76dL / g. At present, although some relatively good test workshops in China can achieve more than 0.80dL / g, they use a high-speed + external cooling injection molding machine to solve this problem. This injection molding machine is expensive and costly, and cannot be used on a large scale. promote. Therefore, the present inventor has studied in depth the existing equipment, through new methods such as the whole workshop environment, adjusting the mold configuration, improving the function of the injection molding machin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C49/06B29C49/42B29C49/58B29C49/64B29L22/00
CPCB29C49/06B29C49/4205B29C49/58B29C49/64B29C2049/5806B29L2031/7158B29C2049/023
Inventor 谢国基姜晓平卢佳涂帅方英郑水豪
Owner GUANG DONG XING LIAN PRECISE MACHINERY
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