News
Material and structural parameters of blown film machine screw and barrel
The screw of a blown film extruder is the core component of the extrusion system, and its structure directly affects plasticizing quality, extrusion stability, and film uniformity. A typical blown film extruder screw uses a single-screw design, divided into three functional zones: the feeding zone, the compression zone, and the homogenizing zone. These three zones work together to achieve solid conveying, melt plasticizing, and pressure equalization output. Feeding Zone: Located…
How to determine if a tapered twin-screw screw is installed correctly?
To determine if a conical twin-screw extruder is worn, the key is to observe four major signals: decreased output, deteriorated melt quality, abnormal energy consumption, and increased clearance. These are often early signs of wear and can be detected by operators even before the equipment is shut down. Wear usually doesn’t happen suddenly but is a slow, cumulative process. The first and most obvious signal is decreased output: even at…
How to reduce the degree of wear of the injection molding machine screw
The injection screw is the core component of the injection molding machine, and the screw is operated under high temperature, high pressure, high mechanical torque and high friction environment for a long time, and the wear problem is inevitable. Generally, the screw has been surface nitrided to increase the surface hardness, that is, Improve anti-wear ability. However, if the cause of wear is neglected, and the wear is not reduced…
What are some common production failures of blow molding machines?
I. Blow Molding Machine Not Dispensing Material Plastic Blow Molding Equipment What are the Common Production Faults of Blow Molding Machines? – Zhoushan jed Machinery Co., Ltd., Extruder Screws, Injection Molding Screws, Zhoushan Screws, Screw Factory II. Black Substances on the Surface of Blow Molded Products There are many reasons why black mineral deposits or short black streaks may appear on the transparent parts of blow-molded products. III. Surface Bubbles…
Screw barrel manufacturing process
Have you ever wondered how is the screw barrel manufactured? Today, I will take you to understand the processing process of screw barrel, let us explore this mysterious world together!First of all, we need to know that the manufacture of screw barrel needs to go through several steps. According to different requirements and specifications, the specific process may be slightly different. But in general, they all include the following steps:1）Tempering…
The customized extruder from the customer will be shipped today
The company shipped a non-standard extruder for customers today, used for double-layer co extrusion of EVA materials.
Teach you how to select and verify the accuracy and stability of injection molding machines?
As one of the pillar industries of light industry, the injection molding industry has penetrated into all aspects of life. As the main equipment for injection molding production, injection molding machines coexist with high, medium and low grades, with a wide range of types and endless application types. Even many professionals in the injection molding processing industry are dazzled and it is difficult to choose the injection molding machine that…
What is the cause of the slippage of the injection screw
For hygroscopic materials (such as nylon), the high water content of the resin can also cause the screw to slip. Improper drying will significantly reduce the viscosity of the material and generate water vapor in the drum, resulting in a reduction in the conveying capacity of the screw. In fact, there are many reasons for slippage, which may be related to high back pressure, overheating or overcooling of the end…
What are the application advantages of cone twin barrel screw in injection molding machine
What are the application advantages of cone twin barrel screw in injection molding machine It can be seen from the extrusion process that the injection screw barrel is operated under high temperature, certain corrosion, strong wear and large torque. Therefore, the conical twin-barrel screw must meet high temperature resistance and not deform under high temperature; wear resistance Long life; corrosion resistance, material is corrosive; high strength, can accept high torque,…
What type of screw barrel is suitable for injection molding manufacturers
Commonly used screws in the market are No. 45 steel, 40cr steel (chrome plated), and 38CrMoAlA nitrided steel. If your product is +glass fiber. When using chrome plating, it will slowly fall off after about 3 months, and the color difference will appear. Nitriding is best. Stainless steel screw cannot be made of glass fiber. Generally, ordinary screws are used for nonspecial materials. Such as PC\PMMA\PA and other materials. barrel…
How much do you know about the causes of extruder screw wear?
Each plastic has an ideal plasticizing temperature range, and the extruder screw barrel processing temperature should be controlled to make it close to this temperature range. Granular plastic enters the barrel from the hopper and first reaches the feeding section. Dry friction will inevitably occur in the feeding section. When these plastics are not heated enough and melted unevenly, it is easy to increase the abrasion of the inner wall…
How to distinguish and correctly apply the screw barrel of the injection molding machine?
The screw is an important component of the injection molding machine. In the production, the screw is responsible for conveying, compacting, melting, stirring and applying pressure to the plastic. The screw required by the injection molding machine can be divided into three types: gradient type, mutation type, and universal type. These three types of screws have their own shapes and functions. The gradual screw is mainly used to process non-crystalline…