Blow Molding Extruder Screw Barrel

Product Introduction:

Blow molding is a common production method of hollow molding in recent years, and it is one of the important methods to remove the extrusion of polymer materials.

Extrusion blow molding is a method of manufacturing hollow thermoplastic parts. Extrusion blow molding is a method of clamping the molten thermoplastic raw materials extruded from the extruder into the mold, and then blowing air into the raw materials. The molten raw materials expand under the action of air pressure, fit to the wall of the mold cavity, and finally cool and solidify to become the desired product shape. In blow molding film, the flat extrusion blowing method is used more. The production process of upper blowing blowing film: heating → feeding → extrusion → feeding → aeration → adjustment → coiling → packaging → finished product. (1) Heating: Heat the extruder and the machine head to the specified temperature through the heater, and keep warm for a period of time. (2) Feeding and extrusion: when the extruder and the machine head meet the insulation requirements, start the extruder and add a small amount of plastic (powder or granule) to the hopper. At the beginning, the screw rotates at a low speed. When the molten material passes through the machine head and blows into a tube bubble, gradually increase the screw speed and fill the material at the same time. (3) Feeding: the molten material through the head will be collected together, and lift it, at the same time through a small amount of air, to prevent mutual bonding. (4) Feeding roller: feed the raised tube bubble to the clamping roller and pass it through the clamping roller. Extrusion blow molding is used for billet processing. According to the feeding mode of billet, extrusion blow molding can be divided into continuous extrusion blow molding and discontinuous extrusion blow molding. Continuous extrusion blow molding means that the extruder continuously extrudates the tube billet when the tube billet reaches the set length, the mold is closed, the tube billet is cut off, and the mold is moved to the next station for expansion, cooling and demoulding. Extrusion blow molding machine production process is synchronous, suitable for high production efficiency, mass output.

Extrusion blow molding process influencing factors: 1, screw speed. It is another important factor affecting the extrusion blow molding of the embryo, through the extrusion speed, determine the quality of the product, reduce the surface sag of the embryo. 2. Temperature control. Extrusion temperature depends on the nature of the resin, too low temperature will lead to rough surface of the embryo, too high temperature will lead to uneven wall thickness of the embryo. 3. Size and quality of mouth die. The size of the die determines the size of the embryo, so the internal surface of the die is required to be smooth, which is conducive to obtaining a smooth embryo on the surface of the product. 4. Selection of raw materials. It is very important in the process of blow molding. HDPE is generally selected according to its fluidity characteristics.

Zhoushan Jed Machinery Co., Ltd. was established in 2013, located in Zhoushan city, known as the “Garden City on the sea”. The company mainly develops, produces and sells screw barrel, integrating design and production and processing, and the products are suitable for various brands and uses of extruder, injection molding machine and granulator. Our company has a complete and scientific quality management system, has passed ISO9001:2000 standard. The company adheres to the management policy of “establishing a brand, only customer first” and the talent management concept of “people first, only talent”. Relying on reliable quality and excellent reputation, customer-oriented production purpose, with diversified products to meet the needs of customers at different levels and in different aspects, and has won the unanimous praise of our customers. Sincerely hope to establish long-term stable and reliable business relations with old and new friends from all walks of life, your needs are our development, let you meet is our unremitting pursuit, we will return your support with better service, more reliable quality, win your trust! Welcome the industry to call consultation, visit guidance, business negotiations. TEL:+8613567672668 Wechat /WhatsAPP is same number.Email:[email protected]

Product advantages:

1, with good transport, compression, melting, plasticizing, exhaust and other functions.

2, according to the product design of different aspect ratio.

Scope of Application:

① HDPE: high density polyethylene, is one of the most commonly used materials in blow molding products. This kind of plastic is suitable for the production of various products, heavy metals, glass, wrapping paper, coolers, fuel tanks, industrial barrels, etc., the use is very wide. Its material is translucent, good tensile degree, strong plasticity, non-toxic, is also a relatively safe material.

② PP: polypropylene is also a more commonly used resin. Suitable for high temperature, its texture and HDPE are translucent, high hardness, low density, but also has certain advantages, often used in medical equipment, chemical containers, drugs and so on.

③ PET: polyethylene terephthalate. Resin, which is more common in life, has good physical and mechanical properties. It is suitable for all kinds of bottles, such as coke bottles, and can also be used as electrical parts. The color is mostly milky white or light yellow, and the surface is smooth and shiny.

④LDPE: high pressure low density polyethylene, is the lightest variety of polyethylene resin. Good transparency and softness. Often used in clothing, food seasoning, etc., the most commonly used is blow plastic bag film.

Widely known blow molding objects include bottles, barrels, cans, boxes and all containers for packaging food, beverages, cosmetics, pharmaceuticals and daily necessities. Large blow molding containers are usually used for the packaging of chemical products, lubricants and bulk materials. Covering blow molding toys, toy blow molding accessories, amusement park blow molding toys, automotive blow molding accessories, blow molding daily necessities, food packaging, drug packaging and other fields.