Jtp Mould
We have a strong moulding technical team, have 5 senior designers and 20 engineers who have more than 15 years experiences in plastic mould making. Our designers are good at designing new plastic mold products and mould structure. In order to avoid any defects during the mould manufacturing, we usually do the mould flow analysis for the mould before we start the work on it. After mould flow analysis, we decide the mould injection gate and structure. Therefore, the plastic mould can be finished successfully and smoothly.
We always focus on perfection on quality and services of plastic molding. We would like to supply our superior services and our high quality plastic mould products to all customers.
Plastic injection molding is a popular and economical industrial process for manufacturing a wide range of plastic consumer products. These include knobs, washers, valves, pulleys, gears, power tools, bottle caps, toys, car panels, computer monitors, keyboards, furniture and so on. These items are mass-produced using molding machines of various sizes and various specific requirements.
The process of plastic injection mould was invented by John Wesley Hyatt. In 1868, he produced billiard balls by injecting celluloid into a mold. Later he built a plunger type injection molding machine to facilitate production. Another inventor, James Hendry, improved on Hyatt’s invention and built a screw injection molding machine in 1946.
Both plunger type and screw injection type molding machines are used in the modern plastics industry. The difference between the two is in the way the plastic is transferred to the mold. Screw injection types are more convenient and are more widely used.
In the plastic molding process, plastic resins are used in pellet or granular form. Choice of plastic type depends on the kind of product being made, its requirements and the overall budget. Of the hundreds of available plastics, only a few are safe for consumer use. Some of the ones used in the plastic injection molding process include polystyrene, polycarbonate, polypropylene, polyethylene, polyamide, polyvinyl chloride, and acrylic.
Plastics are non-degradable and Baby bathtub moulds therefore not environment friendly. The plastic injection molding process, however, plays a positive role in reducing waste. Plastics used in the process can be reused as often as required.
The plastic pellets or granules are poured into the feed hopper of an injection molding machine. The feed hopper is a large container that opens into a heating cylinder. In the heating cylinder, the pellets are subjected to intense heat until the plastic melts.
A plunger or a screw then pushes the molten plastic forward through a nozzle into a split-die mold. The mold is the reverse of the part to be made and can have one cavity or several to make more parts at the same time. Molds can be made of durable and expensive steel, or the more affordable, less-durable aluminum or beryllium-alloy metal.
As with selecting the right plastic type, selecting the mold metal depends upon product, cost and durability factors. Manufacturers often use a less expensive metal mold for prototype molding, and get the more long-wearing, precision-machined molds when the production demand increases.