Category: Blog

Screw of large plastic blow molding machine is an important part of the production process. When the blow molding machine is working, the screw can uniformly plasticize the raw materials into a molten state during the rotation. Extrude to the die to form the required blanks for mold forming. Simply put, the main function of the blow molding machine screw is to plasticize, melt, and convey the raw materials for blow molding. What Yankang wants to popularize with everyone today…

This post introduces the mechanism and characteristics of die head of storage cylinder blow molding machine. Blow molding machine die head, also called the head. The die head includes a perforated plate, a strainer connection tube, and a core assembly. The die heads commonly used in blow molding machines are straight-through die head, corner die head, and die head with storage cylinders. Among them, the straight-through die head direction is consistent with the axial direction of the screw. When the…

The design requirements of extrusion blow mold are the focus of this post. The extrusion blow mold is mainly composed of two halves of female die. It is generally composed of a mold body, a molded neck, a mold cavity, a blank cutting sleeve, a blank opening, a guide column, and so on. There are several aspects to the design requirements of extrusion blow mold. (1) Design requirements for the parting surface of extrusion blow mold The position of the mold…

The operation profile of the MOOG parison wall thickness controller is the focus of this post. For hollow products, controlling the thickness of the parison wall is of great significance to improve product quality and reduce costs. If the product is not effectively controlled during the blowing process, uneven thickness will appear after cooling. The stress of the parison wall with uneven thickness is also different. Thin parts are easily broken. Using the parison wall thickness control system, the gap…

Blow molding parison sagging is the focus of this post. In the article, you will learn about the factors and solutions that affect the blow molding parison sag. Due to the weight of the blow molding parison during the blow molding extrusion process, the blow molding parison is prone to sag, resulting in uneven wall thickness of the blow molding parison. The more severe the sag, the greater the unevenness of the parison wall thickness. Therefore, during the molding process, the…

Extrusion blow molding is the most important blow molding method. First review what is blow molding. Blow molding is the main molding method for producing hollow products. In blow molding, first, a thermoplastic resin is used to obtain a semi-molten tubular blank by extrusion or injection molding. Then, while hot (or heated to a softened state), place the parison in molds of various shapes. After the mold is closed, compressed air is introduced into the parison. Using the gas pressure,…

The reason and solution of the blow molding extrusion parison bending, wrinkling, cracking, etc. are the focus of this post. The tubular plastic parison obtained by extrusion molding of the thermoplastic resin is placed in a split mold while it is hot (or heated to a softened state). Immediately after the mold is closed, compressed air is introduced into the blow-extruded parison to blow the blow-extruded parison and cling to the inner wall of the mold. After cooling and demoulding,…

In the rotational molding process, there are often some quality problems. So today I would like to share with you the quality of plastic rotational molding products quality. Many factors affect the quality of plastic rotational molding products. Among them the more important are the mold shape, the mold rotation speed, mold heating temperature, heating time, the physical characteristics of plastic powder, and so on. Next, we will analyze the factors that affect the quality of plastic rotational molding products…