Mold Structure System
When designing a set of molds, 4 objective conditions must be taken into consideration.
1. Steel structure: Hardness, tensile and compressive strengths, toughness and stress distribution analysis for core insert , mold frames, slides, repositioning tips, and mold seats.
2. Physical and chemical properties of the material of the end product, and the selection of the appropriate core insert material and its characteristics.
3. the establishment of mold processing setup cans and processing technology inspection, checking the standard specification and parts measurement system.
3. the establishment of mold processing setup cans and processing technology inspection, checking the standard specification and parts measurement system.
In general, molds in the roughing process rarely monitor the measurement of the finished process, especially mold seat and bearing plate in a large number of cutting process, induced by the processing of the residual mechanical stress, and after a few days due to the release of stress caused by the size of the size of the inch or deformation. Inaccurate machining tolerances occur, especially in the positioning of multiple holes in a mold, or in the positioning of a multi-process continuous stamping mold and a low base plate for precision undercutting.
Mold Application
Types of mold applications
1． Prehardened die steel for medium to large-sized molds, requiring large cutting volume, large area polishing and saturation engraving or nibbling.
2.Small and micro-precision molds are used for high hardness mold steels that require heat treatment, high wear resistance, mirror polishing and micro-touch surfaces, and high production quantities.
3. Precipitation hardening die steel, easy to machine and polish weld without reheat treatment.
4. Aluminum alloy, beryllium copper alloy of high heat conduction mold materials.
5.Plastic injection molding machine screws, back stops, back stop widths, screw joints of extruders, mold heads, and other parts and materials.
Plastic Mold Steel ( Plastic Mould Steels)
Since 1990, plastic products have accounted for 60~65% of the daily life of human beings, ranging from nano endoscopes for biochemical medical devices to airplane doors. Different molding methods are adopted according to different plastics and product mold sizes.
Plastic rubber molds can be broadly classified into 4 categories.
1.Large Molds
Mold tolerance: 0.05mm~1mm (mm)
Weight with die holder: 1Tons~15Tons (MT)
Auto Bumper, Dashboard, Motorcycle Exterior, Door Interior, Refrigerator, Washing Machine, Plastic Chair, Airplane Door, Shelf
2.Medium-sized molds
Mold tolerance: 0.01mm ~0.05mm
Weight with mold base: 500kg ~ 2 Tons
LED TV chassis, headlights, liquid containers
Household appliances, automobile and motorcycle parts
Computer Case
3.Small molds
Mold tolerance: 0.005mm~0.01mm
Mould weight: 1300kg ~1000kg
Cell Phone Cases, Connectors, Thunderbolt Accessories, and 3C Products Exterior Parts
4.Ultra-precision molds
Mold tolerance: 0.005mm~0.01mm
Mould weight: 50kg ~500kg
Biochemical medical devices, plastic lenses, cell phones, digital camera lens modules, Blu-ray and DVD modules.
Perspectives and Benefits of Plastic Injection Molding Plants
Plastic raw materials in order to meet the daily life of the color and appearance, touch, temperature and weather resistance and durability effect, heat dissipation and green concept, optical transparency and brightness, mechanical strength and other requirements, it is necessary to add a variety of additives, flame-retardant agents, carbon fibers and glass fibers up to 60 ~ 65%, to improve the mechanical properties of the plastic structural parts and physical properties.
1. Yield rate:
Due to the addition of many different synthetic chemical raw materials, highly corrosive elements precipitate out of the gas during the melting period and erode the mold material, resulting in yellowing or short-shooting of transparent parts or chemical products, which affects the defective rate of the product and reduces the efficiency and yield of the production.
2.Production cycle
Plastic injection molding factories are very concerned about the production cycle. If the market demand for a product exceeds 5.1 to 20 million pieces, the production cycle requirement is definitely a key indicator, such as mobile phone lenses,
Digital camera lens module, PET bottles and caps, at least 1 to 3 million molds on the machine.
