+86-18958612836
Cooling method for large hollow blow molding products
2022-03-29
viewed:
The cooling of hollow blow-molded products is a key step in the molding process. Therefore, what Yankang Xiaobian wants to share with you today is the cooling method of large-scale hollow blow-molded products.
Why do you need to cool the hollow blow molded products?
Cooling is to better ensure the geometry and internal structure of the product. In addition to the structure, cooling will further improve the quality and stability of the blow-molded product.
How to cool hollow blow molded products?
After the plastic parison is extruded, a preliminary cooling process should be carried out, otherwise the parison will be deformed under the action of gravity, which directly affects the structure and quality of the product.If it is an amorphous raw material, the corresponding blow-molded product can be cooled by quenching and directly cooled with water. To ensure that the product is fully cooled, the deformation of the product can be effectively avoided.
However, in the extrusion blow molding production process, we often use crystalline raw materials such as polyethylene, so additional consideration must be given to crystallization. The quenching method cannot be used here. If quenching is used, the quality of the product will be affected, and the product will generate internal stress. During the future use of the product, there will be quality problems such as cracks.
Therefore, in the extrusion blow molding process, we recommend that you use a warm water cooling method that gradually cools down. Generally, it should be used in conjunction with the auxiliary machine equipped with the blow molding machine. The cooling water tank should be carried out in sections and sections. The temperature of the cooling water starts from about 75 degrees Celsius, and cools down step by step until it reaches room temperature. It is possible to control the temperature difference of the cooling water in each section, the smaller the more reasonable.
I believe that many manufacturers have encountered the deformation of blow-molded products, which is indeed a very troublesome problem. Although the deformation of products is caused by many factors, if the cooling of blow-molded products is done properly, it will greatly change the blowing Deformation of plastic products .
In the previous article, I shared with you the cooling process and precautions of the blow molding machine. Today, I hope this cooling method for large hollow blow molding products can also be helpful to you
Related Products
Hot Articles
- How to disassemble the screw barrel of the plastic extrusion
- What are the main components of the complete set of plastic
- What are the effects on the quality of blow molding products
- Cooling method for large hollow blow molding products
- Features and advantages of automatic extrusion blow molding
- What are the processing parameters of blow molding machine a
- What is the blow molding process
- What are the control points in the molding process of the bl
Relative Articles
Hot tags: china blow molding machine maker,suppliers, manufacturers, factory, company,customized,china
- Continuous extrusion machine
- Accumulator Head Machine
- Customized Machine
- Mould
- Auxiliary
Blow molding machine supplier
More than 15 years focused on extrusion blow molding machine manufacture, can be used for produce 200ml - 1000L hollow products, multi-heads and multi-layers available customized...
Contact Us
Wening Machinery Co.,Ltd
ADD: Beicheng,Huangyan,Taizhou,Zhejiang,China
Post Code:318020
TEL: +86-576-82858656
MOBILE: +86 189 5861 2836
E-MAIL: haoplast@gmail.com
Quick Links
Copyright © 2020-2025 Wening Machinery all rights reserved