Professional medical plastic bottle seller

2022/04/19

Author: mgg-Plastic bottle manufacturer

Professional medical plastic bottle vendors, manufacturers hotline: + 86-15916785363, MGG allows you to buy the most assured medicinal plastic bottle, solid medicinal plastic bottle, medical plastic bottle At present, the molding method of mainly producing pharmaceutical plastic bottle equipment has several: (1) extrusion blow molding, (2) injection blow molding, (3) pultrusion blow molding, (4) injection blow molding; these four Methods The product structure has different performance. Small pharmaceutical plastic bottles use injection molding equipment pharmaceutical factories, because in the process of injection molding bottle, pay attention to the injection molding equipment of the bottle mouth, thereby ensuring the accuracy bottle, then mechanical configuration by the mandrel The blow molding can ensure the accuracy of the shape size of the pharmaceutical plastic bottle, and the drug can effectively prevent the bottle from volatilizing and external gas penetration. Since the injection molding machine requires a pair of semi-finished molds, blow molds, the cost of the device is a relatively high extrusion blow mold.

Blowing polyester (PET) is a linear thermoplastic saturated polyester, a feature viscosity (IV) 70 - 80 l / g for blowing grade, is used to make the plastic blow molded bottle size. (1) Cylinder temperature parameters: General cylinder before the Cylcurde temperature 265 ° C to 275 ° C, and the cylinder temperature is from 280 ° C to 290 ° C, and the cylinder temperature 260 ° C to 255 ° C. The hygroscopic polymer material must be wet and dried, drying temperature of 150 ° C to 163 ° C, time is 5 hours, the temperature should be reduced to about 120 ° C, about 0.05% water content, heat preservation.

The particle drying has a large effect on forming properties, and the air in contact with the outer surface should be avoided because the dry raw material rapidly absorbs moisture in the air. (2) Injection type blank temperature: In order to ensure the transparency of the semi-finished product, when the melt filling type blank is cold? 45 ° C, more high glass transition temperature (82 ° C), closer to the raw material, glass transition temperature Transparency of the blow molding bottle. (3) Core temperature: In order to ensure uniform temperature distribution of the mandrel, the temperature of the mandrel section is: core bar head 45 ° C and 55 ° C, 40 ° C - 50 ° C, the tail is 25 ° C to 35 ° C.

In the billet injection station, due to the high melting temperature, the core temperature should be limited to the range, and when the mandrel is released, the lower limit of the cold internal core temperature range is defined. 5 Blow molding temperature, the cooling water temperature of the cooling bottle at 5 ° C - 10 ° C, and the temperature can be controlled at 10 ° C to 35 ° C. Blowing pressure 1 - 1.2 Penny, injection pressure is 60 - 100 mp.

About 80% injection pressure, pressure retention time should not be too long. Since PET crystallization speed is fast, high injection speed is required during production.

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