Category: Blog

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…

Rotomoulding, also called rotational molding, is the topic of this post. You will get the authoritative guide about rotomoulding in one post. There are many types of plastic processing and molding methods. In addition to injection molding, blow molding, rotomoulding is another common method. At first, let’s learn the basic principles of rotomoulding. Add plastic materials in powder form in the mould; Continuously rotating and heating the mould; Under the action of gravity and thermal energy, the plastic raw materials…

Plastic blow molded product cooling time is an important factor influencing the plastic blow molding manufacturing process. Today, Yankang will bring a question that everyone often asks, that is, how long does the plastic blow-molded product cooling time?   The plastic blow-molded product cooling time is usually longer. It is generally based on the molding cycle of plastic blow-molded products, accounting for one third to two-thirds of the entire molding cycle.   Why Long Time? Because the production of blow-molded…

How to install a blow molding machine oil cylinder? Why this topic? Everyone should know that after the production of the blow molding machine is completed, it is necessary to assemble the various components and auxiliary machines of the equipment. During the assembly of the blow molding machine, it is necessary to ensure the correct installation of each part, so as to ensure the normal production of the blow molding machine. Therefore, Yankang will bring the installation method of one…