What are the key equipment for producing blow molded products in Dalian?

As an important plastic processing technology, Dalian blow molding products have been widely used in multiple fields due to their advantages of lightweight, durability, and low cost. With the advancement of technology and the continuous changes in market demand, blow molding technology and products will continue to develop towards high performance, intelligence, green environmental protection, and personalized customization. In the future, blow molding products will play an important role in more fields and make greater contributions to human life and social development.

Blow molding is a manufacturing process widely used in the production of plastic products, mainly for producing hollow plastic products such as bottles, containers, cans, buckets, etc. Blow molding technology has been widely used in various fields such as food packaging, daily necessities, industrial containers, medical devices, etc. due to its high efficiency, flexibility, and cost-effectiveness.

What are the key equipment for producing blow molded products in Dalian?

Blow molding machine

Extrusion blow molding machine: It is one of the common blow molding equipment, mainly composed of extruder, head, mold, blowing system, and control system. The extruder heats and melts plastic raw materials and extrudes them into tubular billets. The head shapes and controls the billets, and after the mold is closed, the billets are clamped. The blowing system introduces compressed air into the billets to inflate and shape them. Commonly used in the production of various hollow plastic products such as plastic bottles, barrels, cans, etc.

Injection blow molding machine: generally composed of injection device, blow molding device, mold system, and control system. Firstly, molten plastic is injected into the preform mold through an injection device to form a preform. Then, the preform mold is transferred to the blow molding mold, and the preform is expanded and formed inside the blow molding mold by blowing air. This type of equipment produces products with high dimensional accuracy and good surface quality, and is commonly used to produce high-quality plastic bottles, such as cosmetic bottles, pharmaceutical bottles, etc.

Stretch blow molding machine: Stretch blow molding is an additional stretching step on the basis of extrusion blow molding or injection blow molding. In addition to the basic components of a regular blow molding machine, a stretch blow molding machine is also equipped with a stretching device that can stretch the preform axially and radially during the blow molding process, aligning the molecular chains of plastic products and improving their strength, transparency, and barrier properties. Commonly used in the production of PET plastic bottles and other products with high performance requirements.

auxiliary equipment

Plastic crusher: used to crush unqualified products, scraps, and other materials generated during the production process into small pieces for reuse in production, achieving resource recycling and reducing production costs.

Plastic mixer: Mix plastic raw materials of different colors and properties, as well as various additives, evenly before production to ensure the stability and consistency of product quality.

Feeding machine: It can automatically transport plastic raw materials from storage containers to the hopper of the blow molding machine, achieving automated feeding, improving production efficiency, and reducing manual labor intensity. According to different working principles, there are various types of feeding machines such as spiral feeding machines and vacuum feeding machines.

Mold cooling equipment: such as chillers, is required to cool the mold during the blow molding process, so that the blow molded product can quickly cool down and shape, improving production efficiency and product quality. The chiller provides stable cooling temperature for the mold by circulating cooling water.

Air compressor: providing compressed air for the blowing system of blow molding machine, it is one of the key equipment to ensure the smooth progress of blow molding process. Its working principle is to compress air to a certain pressure, and then transport it through pipelines to the blowing device of the blow molding machine, providing power for the expansion of the billet.

Testing equipment

Wall thickness detector: The uniformity of wall thickness in blow molded products is crucial for product quality. The wall thickness detector can detect the wall thickness of products online or offline. Through technologies such as ultrasound and radiation, it accurately measures the wall thickness of different parts of the product, timely detects uneven wall thickness problems, and adjusts the production process accordingly.

Appearance inspection equipment: Using machine vision technology to inspect the appearance of blow molded products, it can quickly detect defects such as scratches, bubbles, cracks, and missing materials on the surface of the product, improving the appearance quality and qualification rate of the product.

Extrusion blow molding is a common blow molding process, suitable for producing various hollow products. The process involves extruding molten plastic into a tubular billet through an extruder, then placing the billet into a mold, blowing air to expand and adhere to the inner wall of the mold, cooling and demolding to obtain the finished product. The extrusion blow molding process is simple, cost-effective, and suitable for large-scale production.

Blow molded products usually have good flexibility, are not easy to break, and can withstand a certain degree of bending, stretching, and compression, such as plastic buckets, plastic bottles, etc. made by blow molding, which are not easily damaged during transportation and use. Most blow molded products are made of plastic materials, which have excellent corrosion resistance and can resist the erosion of chemicals such as acids, alkalis, and salts. They can be used for storing and transporting various chemicals.