Plastic
Application Of Injection Plastic Parts in The Field Of Hardware Tools
What are the hardware tools？
1. Hardware and electromechanical products: hand tools, power tools, cutting tools, measuring tools and abrasives, fasteners and seals, material handling, storage, packaging, and workshop office supplies, electrical products, testing instruments, motors, bearings and belts ,illumination;
2. Hand tools: tool box/bag; tool cart; tool box; portable tool box; tool bag; wrench; adjustable wrench; open-end wrench; dual-purpose wrench; Torx wrench; ratchet wrench;
3. Set of insulating tools: pipe wrench; pipe vise; chain pipe wrench; plastic hard pipe cutter; wire threading tool;
4. Power tools: drill bits; shovel chisels; screw bits and sockets; hole saws; jig saw blades; circular saw blades; saber saw blades; slices for grinding machines; ;
5. Cutting tools, measuring tools and abrasive tools: twist drill; center drill; wire hammer; die; end mill; slot milling cutter;
Power tools are a commonly used hardware tool product in the modern hardware industry. They are generally classified according to the fields in which power tools are applied, mainly metal cutting power tools, grinding power tools, assembling power tools and railway power tools; and daily life. The commonly used hardware power tools mainly include electric drills, electric grinders, electric wrenches and electric screwdrivers, electric hammers and impact electric drills, concrete vibrators, electric planers, etc., and different types of hardware electric tools are generally used in different fields. .
1. Electric drill: The main specifications are 4, 6, 8, 10, 13, 16, 19, 23, 32, 38, 49mm, etc. The number refers to the maximum diameter of the drill bit for drilling on steel with a tensile strength of 390N/mm. For non-ferrous metals, plastics and other materials, the maximum drilling diameter can be 30-50% larger than the original specification.
2. Electric grinder: a tool for grinding with a grinding wheel or a grinding disc. There are straight electric grinders and electric angle grinders.
3. Electric wrench and electric screwdriver: used for loading and unloading threaded joints. The transmission mechanism of the electric wrench consists of a planetary gear and a ball screw groove impact mechanism. Specifications are M8, M12, M16, M20, M24, M30, etc. The electric screwdriver adopts a tooth clutch transmission mechanism or a gear transmission mechanism, and the specifications are M1, M2, M3, M4, M6, etc.
4. Electric hammer and impact drill: used for drilling, grooving and roughening of concrete, brick walls and building components. Combined with expansion bolts, it can improve the installation speed and quality of various pipelines and machine tools.
All the above hardware tools have plastic related accessories, including insulating, anti-corrosion, wear-resistant, according to the product characteristics, choose different plastic products to match the application
Main Type
1. Rubber injection molding: Rubber injection molding is a production method in which the rubber material is directly injected into the model from the barrel for vulcanization. The advantages of rubber injection molding are: although it is an intermittent operation, the molding cycle is short, the production efficiency is high, the blank preparation process is cancelled, the labor intensity is small, and the product quality is excellent.
2. Plastic injection molding: Plastic injection molding is a method of plastic products. The molten plastic is injected into the mold of plastic products by pressure, and the various plastic parts are obtained by cooling and molding. There are mechanical injection molding machines dedicated to performing injection molding. The most commonly used plastics are polyethylene, polypropylene, ABS, PA, polystyrene, etc.
3. Molding and injection molding: The resulting shape is often the final product, and no other processing is required before installation or use as a final product. Many details, such as bosses, ribs, and threads, can be formed in a single injection molding operation.
Process Basics
●Purpose, operation and results of temperature, pressure, speed and cooling controls
●How adjustments to injection molding machine settings affect process and quality
●Optimized screw control settings
●Multi-stage filling and multi-stage pressure-holding control; effects of crystallization, amorphous and molecular/fiber orientation on process and quality
●Influence of internal stress, cooling rate and plastic shrinkage on the quality of plastic parts
●Plastic rheology: how plastics flow, orient and change viscosity, shear and molecular/fiber orientation
●Relationship between gating system, cooling system, mold structure and injection molding process
Problem Analysis
Shrinkage cavity, shrinkage, unsaturated mold, burr, weld line, silver wire, spray mark, scorch, warpage deformation, cracking/fracture, dimension out of tolerance and other common injection molding problem description, cause analysis, and in mold design, molding Solutions for process control, product design and plastic materials.
●Cause analysis and countermeasures of lack of glue and unsaturated mold around injection molded parts
●Cause analysis and solutions
●Cause analysis and countermeasures of surface shrinkage and shrinkage cavity (vacuum bubble) of injection molded parts
●Cause analysis and countermeasures of silver streak (material flower, water splash), scorch, and gas streak
●Cause analysis and countermeasures of water ripples and flow marks (flow marks) on the surface of injection molded parts
●Cause analysis and countermeasures of water marks (welding lines) and spray marks (serpentine marks) on the surface of injection molded parts
●Cause analysis and countermeasures of surface cracks (cracking) and top white (top explosion) of injection molded parts
●Cause analysis and countermeasures of surface color difference, poor gloss, color mixing, black stripes and black spots of injection molded parts
●Cause analysis and countermeasures of warping deformation and internal stress cracking of injection molded parts
●Cause analysis and countermeasures of dimensional deviation of injection molded parts
●Cause analysis and countermeasures of injection molding parts sticking to mold, dragging (strain) and dragging white
●Cause analysis and countermeasures of insufficient transparency and insufficient strength (brittle fracture) of injection molded parts
●Cause analysis and countermeasures of cold spot and peeling (layering) on the surface of injection molded parts
●Cause analysis and countermeasures of bad metal inserts for injection molded parts
●Cause analysis and improvement measures of nozzle drooling (runny nose), glue leakage, nozzle wire drawing, nozzle blockage, and difficulty in mold opening
●Using CAE mold flow analysis technology to quickly and effectively solve the problem of injection molding site
Optimized Design
●The structure, composition, classification and function of injection mold;
●Optimized design of pouring system (gate, runner, cold well, etc.)
●Optimized design of cooling system (waterway, water barrier, beryllium cylinder, etc.)
●Setting and adjustment of shrinkage rate
●Relationship between gating system, cooling system, mold structure and injection molding process
●Mould installation, commissioning and maintenance
●Using chiller and mold temperature machine to control the process
●Using CAE mold flow analysis technology for mold optimization design