Several key factors affecting the molding of PET preform molds:
Factor 1: The exquisite design of the core rod in the joint research mold
In PET preform molds, the length design of the core rod is crucial and usually follows the 10:1 ratio principle. This design consideration stems from the enormous challenge of injection pressure experienced during the molding process of the billet. If the length ratio of the core rod is too large, it is easy to cause it to bend under high pressure, which in turn affects the uniformity of the billet wall thickness. In addition, the height of the core rod needs to be accurately matched with the height of the billet, and the temperature should be precisely controlled at around 145 degrees Celsius during the production process to ensure the production of highly transparent plastic parts. The exquisite craftsmanship of Heyan Mold in this regard ensures that every detail is meticulously crafted.
Factor 2: Key regulation of melt temperature
The melt temperature of the preform is another key factor in the molding process. For PET molds, the temperature environment inside the equipment has a profound impact. Therefore, it is necessary to increase the barrel temperature to stabilize the PET melt temperature. When the barrel temperature is set to 280 degrees Celsius, the melt temperature needs to be maintained at 290 degrees Celsius. This temperature control strategy ensures high transparency and excellent quality of the plastic parts. The joint research mold provides solid support for this process through advanced temperature control technology.
Factor 3: The delicate balance between preform and inflation ratio
During the plastic molding stage, the blowing ratio of the preform is closely related to the axial stretching effect. The larger the inflation ratio, the smaller the axial tension, which may lead to uneven thickness distribution of the plastic bottle wall and unnatural curves at the transition position between the bottle body and the bottle body. By finely designing the inflation ratio and stretching process, Heyan Mold effectively avoids these problems and ensures the perfect molding of plastic parts.
Factor 4: Accurate matching of bottle blank mouth and thread mouth size
To ensure the sealing performance of plastic parts, the size of the bottle blank mouth and threaded mouth in PET molds must be strictly uniform. Any slight difference in size may have an adverse effect on the sealing of plastic parts. During the production process, Heyan Mold strictly controls every detail to ensure a perfect fit between the bottle blank mouth and the threaded mouth.
Next, let's briefly understand the two methods of forming PET preform molds:
1. Extrusion blow molding: This method involves extruding and blow molding the preform, followed by heating and stretching it into the final product. The precise design and stable performance of the joint research mold during this process provide strong guarantees for efficient production.
2. Injection molding blow molding: Unlike extrusion blow molding, injection molding blow molding first shapes the billet and then produces the final product through a mold. Regardless of the method, the joint research mold ensures the perfect effect of plastic molding with its excellent dimensional accuracy and process control.
In summary, whether in terms of core rod design, melt temperature control, inflation ratio adjustment, size matching, etc., HeYan Mold has demonstrated its profound expertise and exquisite skills in the field of PET preform mold plastic molding.
Foshan Heyan Precision Mould Technology Co., Ltd.'s main business is preform moulds, bottle blowing moulds, bottle cap moulds and other products. It has a strong engineering, R&D, technology and sales team, advanced processing equipment and rich project experience. If you want to know more or have special needs, please call 13318345050, or add our WhatsApp.
