What are the practical applications of transcription in molds? I want to know specifically about this information!

A, commonly used plastics selection guide ABS acrylonitrile - butadiene - styrene **** polymer Typical applications: automotive (dashboards, tool hatches, wheel covers, reflector boxes, etc.), refrigerators, high-strength tools (hair dryer, blender, food processor, lawnmowers, etc.), telephone shells, computer keyboards, recreational vehicles, such as golf carts, and jet sled car. PMMA Polymethylmethacrylate (Acrylic) Typical applications: automotive industry (signaling equipment, instrument panels, etc.), medical equipment (blood storage containers, etc.), industrial applications (video discs, light diffusers), consumer products (beverage cups, stationery, etc.) PP Polypropylene (polypropylene) (bending adhesive with excellent resistance to bending) Typical applications: automotive industry (PP with metal additives is used: fenders, ventilators, fans, etc.), automotive industry (PP with metal additives: fenders, ventilators, fans, etc.), automotive equipment (fenders, ventilators, fans, etc.), Typical applications: Automotive (mainly PP with metal additives: fenders, ducts, fans, etc.), Appliances (dishwasher door gaskets, dryer vents, washing machine frames and covers, refrigerator door gaskets, etc.), Consumer products (lawn and garden equipment such as lawn mowers and sprinklers, etc.). PS Polystyrene Typical applications: product packaging, housewares (cutlery, trays, etc.), electrical (transparent containers, light diffusers, insulating films, etc.) PVC (Polyvinyl Chloride) Typical applications: water supply lines, household plumbing, house wall panels, commercial machine housings, electronics packaging, medical equipment, food packaging, etc. SA Styrene-Acrylonitrile*** Polymer Typical applications: electrical (sockets, housings, etc.), consumer goods (lawn and garden equipment such as lawn mowers and water sprayers, etc.). Typical applications: Electrical (sockets, housings, etc.), consumer goods (kitchen appliances, refrigerator units, TV bases, cassette cases, etc.), automotive industry (headlight boxes, reflective surfaces, dashboards, etc.), housewares (tableware, food cutlery, etc.), cosmetic packaging, etc. PC Polycarbonate Typical applications: Electrical and commercial equipment (computer components, connectors, etc.), appliances (food processors, refrigerator drawers, etc.), transportation industry (vehicle front and rear lights, dashboards, etc.), food packaging, etc. Industry (vehicle front and rear lights, instrument panels, etc.) Second, to confirm the number of plastic products need to open the mold and mold material selection 1, the number of products need to open the mold selection principles: a, transparent products and non-transparent products to open the mold separately, b, there are special requirements, such as the injection of color molds need to open a separate mold, c, the mold row position as far as possible when the selection of similar sizes are arranged together, such as the product is too large or too much line needs to be separately open the mold, the row of mold cavities should not be too much, unless the mold is not too big, the mold should not be too many, unless the product is too big. Try not to have too many holes, unless the product size is small 2, mold steel selection (plastic mold steel) a, domestic: B30 B20 45 50 B610SM1 40Cr b, the United States: 1050 1045 c, Japan: S50C S48C S45C d, Germany: 2738 C45 C50 Usage: Used for the manufacture of production batches are small, the mold cross-section is not large, the dimensional accuracy and surface roughness requirements are not high plastic molds, the mold should be opened individually. Roughness requirements are not high plastic forming molds or mold frame 3, advanced mirror die steel (transparent lens) a, China: 3-4Cr13 3Cr2Mo P4410 b, the United States: 420 P20 P20tNi c, Japan: PDS5S NAK80 d, Sweden: s136 718 e, Germany: 40CrMo74 2083 2738 Uses: Used in the manufacture of PVC and other highly corrosive plastic molds. Strong corrosive plastic mold, transparent plastic and high requirements of the plastic film polishing Die steel characteristics: high purity of steel, with good cutting performance, made of high precision molds, never deformed. Higher toughness, suitable for large and complex molds. Third, confirm the mold design and mold requirements Clearly want to use the mold materials and product materials, to confirm the mold design in the precision and tolerance, mold surface treatment process; mold material is not the need for special treatment such as hardening, quenching, etc.; followed by the degree of plastic product requirements and strict procedures to determine whether to open the large mouth mold or fine mouth mold mold mold mold design mold manufacturing and mold processing Plastic Features and injection molding 1, cell phone shell mold knowledge 2, hand plate model (rapid prototyping technology) 3, mold surface technology 4, with threaded plastic products mold manufacturing technology 5, knowledge of electric casting 6, electroplating knowledge