Warm Global Customers
With China Plastic Machinery
With China Plastic Machinery
Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting.
Injection molding machine (referred to as injection machine or injection molding machine) is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. Injection molding is achieved through injection molding machines and molds.
1. Rubber injection molding: Rubber injection molding is a production method that injects rubber directly from the barrel into the model for vulcanization. The advantages of rubber injection molding are: although it is an intermittent operation, it has a short molding cycle, high production efficiency, and eliminates the blank preparation process, low labor intensity, and excellent product quality.
2. Plastic injection molding: Plastic injection molding is a method of plastic products. The molten plastic is injected into the plastic product mold under pressure, and the desired plastic parts are obtained by cooling and molding. There are mechanical injection molding machines specifically used for injection molding. The most commonly used plastic at present is polystyrene.
3. Molding injection molding: The resulting shape is often the final product, and no other processing is required before installation or use as the final product. Many details, such as protrusions, ribs, and threads, can be molded in one step of injection molding.
Injection molding is also a shoe made by machine. After the upper is tied to the aluminum last, PVC, TPR and other materials are generally directly injected by a turntable machine to form the sole in one go. Nowadays, there is also PU (chemical name polyurethane) injection molding (the machine and mold are different from general injection molding).
Advantages: Because it is made by machine, the output is large, so the price is low.
Disadvantages: If there are many styles, it is troublesome to change the mold, the shoes are difficult to shape, and the workmanship is not as delicate as cold-glued shoes, so it is generally suitable for orders with a single sole style.
The purpose, operation and results of temperature, pressure, speed and cooling control
How the adjustment of injection molding machine settings affects the process and quality
Optimize screw control settings
Multi-stage filling and multi-stage pressure holding control; the influence of crystallization, non-crystallization and molecular/fiber orientation on the process and quality
The influence of internal stress, cooling rate and plastic shrinkage on the quality of plastic parts
Plastic rheology: how plastic flows, arranges and changes viscosity, the relationship between shear and molecular/fiber orientation
The relationship between pouring system, cooling system, mold structure and injection molding process
Description and cause analysis of shrinkage, shrinkage, incomplete mold, burrs, weld marks, silver wire, spray marks, scorching, warping, cracking/rupture, dimensional deviation and other common injection molding problems, as well as solutions in terms of mold design, molding process control, product design and plastic materials.
Analysis and solutions to the lack of glue and incomplete mold around injection molded parts
Analysis and solutions to the cause of batching (burrs)
Analysis and solutions to the cause of shrinkage and shrinkage (vacuum bubbles) on the surface of injection molded parts
Analysis and solutions to the cause of silver streaks (material flowers, water flowers), burning and gas streaks
Analysis and solutions to the cause of water ripples and flow streaks (flow marks) on the surface of injection molded parts
Analysis and solutions to the cause of water inclusion streaks (weld marks) and spray streaks (snake streaks) on the surface of injection molded parts
Analysis and solutions to the cause of cracks on the surface of injection molded parts Cause analysis and solution of color difference, poor gloss, color mixing, black stripes and black spots on the surface of injection molded parts
Cause analysis and solution of warpage and internal stress cracking of injection molded parts
Cause analysis and solution of dimensional deviation of injection molded parts
Cause analysis and solution of sticking, stripes (strain) and whitening of injection molded parts
Cause analysis and solution of insufficient transparency and insufficient strength (brittle fracture) of injection molded parts
Cold material spots and peeling on the surface of injection molded parts (Delamination) Cause Analysis and Solution Countermeasures
Cause Analysis and Solution Countermeasures for Defective Metal Inserts of Injection Molded Parts
Cause Analysis and Improvement Measures for Nozzle Drooling (Runny Nose), Leakage, Nozzle Wiredrawing, Nozzle Blockage, Difficulty in Mold Opening
Use CAE Mold Flow Analysis Technology to Quickly and Effectively Solve Injection Molding Site Problems
Structure, Composition, Classification and Function of Injection Molds;
Optimization Design of Gating System (Gating, Runner, Cold Well, etc.)
Cooling System (Water Channel, Water Baffle, Beryllium barrel, etc.) optimization design
Setting and adjusting the shrinkage rate
The relationship between the pouring system, cooling system, mold structure and injection molding process
Mould installation, commissioning and maintenance
Control of the process by using a chiller and a mold temperature controller
Optimization of mold design by using CAE mold flow analysis technology
Injection molding machines (injection molding machines) have two basic components: the injection device and the clamping device for melting and feeding the plastic into the mold. The function of the clamping device is to:
1. Close the mold while bearing the injection pressure;
2. Take out the product. The injection device melts the plastic before it is injected into the mold, and then controls the pressure and speed to inject the melt into the mold. There are two designs of injection devices currently used: screw preplasticizer or two-stage device, and reciprocating screw. Screw preplasticizers use a preplasticizing screw (first stage) to inject the molten plastic into the injection rod (second stage).
The advantages of screw preplasticizers are constant melt quality, high pressure and high speed, and precise injection volume control (using mechanical thrust devices at both ends of the piston stroke). These advantages are required for transparent, thin-walled products and high production rates. Its disadvantages include uneven residence time (causing material degradation), high equipment costs and maintenance costs.
The most commonly used reciprocating screw injection device does not require a plunger to melt and inject the plastic.
There are three types of injection molding machines: vertical, horizontal, and all-electric, but no matter which type of injection molding machine, it has two basic functions:
(1) heating the plastic to make it reach a molten state;
(2) applying high pressure to the molten plastic so that it is ejected and fills the mold cavity.
Ultra-low cost injection molding
¢ÙHigh-efficiency material engineering:
1. Heatless regeneration dehumidification and drying: save more than 50% electricity, environmental protection (no regeneration gas emission);
2. Strong cleaning of screw, prevention of black spot defects
3. Material recycling and reuse, prevention of foreign matter mixing
¢ÚHigh-efficiency energy-saving engineering:
1. Injection molding machine power saving:
2. Electromagnetic heating of barrel: save 50%+ electricity
3. Insulation coating: coating 3mm, used in any place, save 30%+ electricity
¢ÛUltra-short cycle engineering:
1. Shortened inventory cycle: finished products, semi-finished products, raw materials, defective products, etc.
2. Shortened molding cycle, pulse cooling molding
¢ÜThe latest pulse cooling technology and equipment to reduce mold cooling cycle;
1. Improve molding technology and reduce molding cycle. Including: improvement of mold defects/molded product defects, molding process optimization, new mold trial and defect improvement, and reduction of defect rate in the project; 2. Shortening of operation time and rapid mold switching 3. Improvement of molding engineering and shortening of operation time. Including: automatic/semi-automatic operation, rapid mold switching, robot operation, rapid robot switching operation, one machine and one person operation, multiple machines and one person operation Copper nuts Overview Injection molded copper nuts can be understood as inlaid copper nuts or embedded copper nuts. Different injection molded copper nuts have appeared in the market today, and their uses are also different. Principle The main purpose of copper inserts is to inject products into some plastic parts, and after installation, an effective internal thread can be formed in the plastic parts. The operation method is to heat the product and embed it into the plastic part or directly use mold injection. Because brass has good thermal conductivity, after heating, pressing the copper insert into the plastic matrix can make the product quickly heat up and speed up work efficiency. The heated copper insert can also quickly transfer heat to the plastic part, so that the periphery of the plastic hole becomes soft, and the product can be quickly pressed into the hole. If mold injection molding is used, after the copper insert is hot-injected into the plastic part, due to the embossing process on the outer diameter, a certain friction and bite force is formed with the copper insert after forming, which can fix it inside and prevent it from falling off.
Application
The products are widely used in: mobile phones, laptops, various plastic shells, communications, micromotors, computers, electrical appliances, electronics, toys, clocks, lighting, motorcycles and other industries.
Types
The current types mainly include: CNC computer parts, mobile phone nuts, embossed nuts, hot melt nuts, hot press nuts, embedded nuts, ultrasonic nuts, injection nuts, insert nuts, copper shafts, copper columns, copper sleeves, copper cups, precision shafts and non-standard screws and nuts, etc., with more than 10,000 specifications.
Raw materials
Mainly include: environmentally friendly copper, H3604 copper, Japanese 303 stainless steel, 24C easy-to-turn iron, aluminum alloy, Saigang.
If you are interested in our company and machine, feel free to contact our sales engineer. We will contact you as soon as possible.