Pet Bottle Preform Warm Runner Mold Is Widely Used


Posted February 25, 2019 by nicolepreform

With the rapid development of the plastics processing industry, the use of Pet Bottle Preform warm runner molds has become more widespread.

 
With the rapid development of the plastics processing industry, the use of Pet Bottle Preform warm runner molds has become more widespread. Injection molding uses warm runner molds with the following advantages and strengths:

1. The water is returned to the raw material to save the original data.

2. Shorten the molding cycle and improve productivity.

3. Guarantee the quality of plastic parts and complete production automation.

One. Rationality of mold construction:

With regard to a multi-cavity mold, its structure is roughly divided into three parts:

1. The main flow path.

2. Heating plate (body).

3. Warm runner nozzle.

In the meantime, the warm runner nozzle is the most basic part. The molten PET enters the cavity through the nozzle through the dry flow passage in the heating plate, which is directly related to the quality of the tube blank. Therefore, the following guidelines should be adhered to in the construction of the mold:

1. Adhere to the heat balance of the nozzle so that the resin is in a molten state during the injection process. To do this, make the contact surface of the nozzle and the template as small as possible.

2. Guaranteed sealing. For example, the “meeting” between the nozzle and the flow channel plate, the joint between the nozzle parts should be sealed to prevent the molten resin from leaking under the injection pressure.

3. When the cooled nozzle is reheated to start working, the condensate of the gate is not easy to melt, and it is usually "melted". Therefore, the length of the nozzle should be properly designed, and the nozzle with the heat transfer property such as beryllium copper should be made.

4. The nozzle often has a blocking view, and it is convenient to disassemble it.

two. Sophisticated technical conditions:

1. Useful mold temperature control: cavity, core can be quickly cooled, there must be cooling water, and the water hardness is suitable, anti-scaling, anti-blocking.

2. In the injection molding process, the “reverse pumping” (pressure relief) of the screw can be completed to ensure the outstanding formation of the billet. This is especially important for the “one-step method”, otherwise the bottle can easily leak bottom.

3. Select a suitable heating temperature, and the warm runner temperature is 2 to 4 degrees lower than the barrel temperature.

4. Cooling, injection, pressure keeping, and even opening and closing the mold must have excellent coordination with the injection and pre-plasticizing speed, so that the cycle can be minimized.

Jilian Plastic Mould is the best and most reliable pet product manufacturer in China. We offer a wide range of products from 5-Gallon Pet Preform to handles, caps, etc. Welcome customers who have this need. Contact us, we can definitely bring you a satisfactory product and service.
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Issued By jilian
Business Address 19-1 Fengli road ,Shilipu, Nancheng street, Huangyan, Taizhou, Zhejiang, China
Country China
Categories Business
Last Updated February 25, 2019