Quality plastic mold manufacturer: In the blow molding process, the billet is formed by the head under low pressure, and is blown under low pressure, because the residual stress of the product is small, and the strain properties such as stretching, impact, bending and environment need to be improved, so its use performance is higher. There is no waste generated in the processing of blow molded products, which can well control the wall thickness of the products and the dispersion of the materials, and the fine neck products have high molding accuracy, and the surface of the products is smooth, and can be economically produced in small batches. And the products have no seams, high bottom strength, accurate mouth size, and blow molded products have high stiffness, high strength, high hardness, creep resistance, gloss and moisture permeability, good oil, fat, acid and alkali resistance, and a very wide range of use. See extra info at blow mold services.
Mulan Group currently owns 2 manufacturing companies and holds 3 processing plants. Its business scope includes: CNC Machining Service, Sheet metal Fabrication, Rapid Prototyping, Plastic injection molding service, mould tools, etc. An experienced team of engineers and an efficient sales team provide quick feedback to all production project queries for global buyers. According to the different application requirements of the product, we can take several different ways to carry out plastic overmolding, the main difference is the combination of different materials.
Plastic injection molds are made of mold steel, aluminum alloy and other materials. It is divided into a fixed end and a sliding end. Generally, the sliding end has a feed injection hole, a support plate, an ejector box, an ejector rod, an ejector pin, an ejector plate and other accessories. Mold manufacturing and design is a professional and challenging job, which can directly represent whether a manufacturer has the technical ability to provide a series of solutions for high-precision products.
Blow molding is widely used in the production of hollow structure products, such as: water bottles, oil drums, chemical turnover barrels, floats, medical reagent bottles, etc. Injection blow molding is suitable for small container production, and stretch blow molding is suitable for medium and large-volume container products. However, the surface effect of injection blow molded products is better than stretch blow molding, and can be highly transparent and flat. Drinking water bottles are the most typical injection blow molding. Blow molding has many limitations due to the molding principle, so there are a few points that should be paid attention to when designing blow molding products: Only limited to hollow structural parts. The wall thickness is thin and the strength is low. By adding other materials in the multilayer part, the effect of blocking sound and heat sources is increased. (So not recyclable) A second trimming is required to remove burrs and excess material.
Rotomolding molds are usually made of cast aluminum or steel plates without the aid of high pressure, so the mold process is relatively simple, the cost is low, and small batch production has economic advantages and is suitable for early investment in product development. Rotomolding relies on the material to adhere to the inner wall of the mold, which has very low restrictions on the shape of the product. It can be achieved smoothly through reasonable design of the mold details. And you can easily create functions such as reinforced ribs, custom textures, and in-mold inlays.
Rigid plastic overmolding process: After the internal base material is made of rigid plastic injection molding, another type of steel plastic is wrapped around the base material through an overmolding mold. The color of the material can be customized, but the material compatibility limit should be consulted. Otherwise, cavities or cracks will occur. Rubber overmolding plastic: The internal base material is made of steel plastic. After molding, the rubber material or TPE material is wrapped on the surface of the base material. The product presents the softness of rubber and can play a role in wear resistance and non-slip, such as: toothbrush handles, electric tool handles, etc. See a lot more info at https://www.china-plasticparts.com/.
The process of rotational molding is much simpler than the manufacturing process that relies on pressure molding, but in fact it requires very rich experience and technical knowledge. While the material cannot be controlled by high pressure, the environmental temperature, environmental humidity, mold type, material specification, material Factors such as pretreatment quality will directly affect the final quality of rotomolding products. Put the powdered plastic into the hollow mold. Close the mold and rotate along the two axes. Heating the mold during the rotation process to melt the powder material. After all the materials are melted, cool the mold.After the product has solidified, open the mold and take out the product.
The loss of raw materials is small and will not cause too much loss (usually 2% to 5% of the product quality). The internal stress of the product is very low, and the warpage deformation is also very small, and the mechanical properties are relatively stable. The wear of the mold cavity is small, and the maintenance cost of the mold is low. The cost of molding equipment is low, and the mold structure is simpler, and the manufacturing cost is usually lower than that of injection molds or transfer molding molds. Larger flat products can be formed. The size of the products that can be formed by molding is only determined by the clamping force of the existing molding press and the size of the template.