Shanghai Chunxu Mould Industral Co., Ltd.




Rotational molding technology:
Rotational molding, also known as Rotational Moulding, is to load a quantitative powdered resin into a cold mold. The rotomolding machine drives the mold to rotate slowly and rotate around two mutually perpendicular shafts while heating with an external heating source. The mold is used to melt the resin powder and uniformly apply it to the entire cavity surface by means of its own gravity, and finally to obtain a hollow product by cooling and demolding.
Features of the rotomolding process:
1. Low cost of rotomolding mold: For products of the same size and size, the cost of rotomolding mold is about 1/3 to 1/4 of the cost of blow molding and injection molding;
2. The edge strength of the rotomolded product is good. Rotomolding can achieve a thickness of more than 5 mm at the edge of the product, completely solving the problem of thinner edges of the hollow product;
3, rotomolding can be placed in various inserts;
4, the shape of the rotomolded product can be very complicated, and the thickness is more than 5 mm;
5, rotomolding can produce fully enclosed products;
6. Rotomolding products can be filled with foaming materials to achieve heat preservation;
7, no need to adjust the mold, the wall thickness of the rotomolded product can be freely adjusted (2mm or more);
8. The product is hollow and seamless, but the wall thickness can be adjusted to make the product have high strength;
9, can provide a variety of surface pattern processing, production of various color products, can be used for anti-UV anti-aging treatment, for a variety of stone, wood simulation effects.
The main application of rotomolding products
With the continuous development of the rotational molding process, the types of rotationally molded products are increasing and the range of applications is expanding. At present, the industries involved in rotomolding products at home and abroad include transportation, traffic safety facilities, entertainment industry, dredging of rivers and rivers, construction industry, water treatment, medicine and food, electronics, chemicals, aquaculture, textile printing and dyeing, etc.:
1, container type rotomolded parts
These plastic parts are widely used in storage and supply tanks, water storage tanks, various industrial chemical storage and transportation containers, such as acid, alkali, salt, chemical fertilizers, pesticide storage tanks, chemical companies, industrial coatings, rare earths. Washing tanks, reaction tanks, turnover boxes, garbage bins, septic tanks, living water tanks, etc. If you use Philippine's rotomolded grade cross-linked polyethylene resin "Maricxcl & mdash; 100", the rotomolded cross-linked polyethylene barrel can be comparable to the metal barrel, and its chemical resistance is good, maintenance costs low.
2. Rotomolding parts for transportation
Mainly using polyethylene and polyvinyl chloride paste resin, rotomolding various automotive parts, such as air conditioning elbows, vortex tubes, backrests, handrails, fuel tanks, fenders, door frames and shift lever covers, battery housings, snowmobiles And the fuel tank of the motorcycle, the aircraft fuel tank, the yacht and its water tank, the boat and the shock absorber between the ship and the dock.
3. Rolling plastic parts for sports equipment, toys and handicrafts
There are mainly various kinds of parts of PVC paste rotomolding, such as water polo, floating ball, small swimming pool, entertainment boat and its water tank, bicycle seat cushion, rotomolding pallet, surfboard and so on. Since the rotomolding mold can be manufactured by precision casting, electroforming, etc.; the surface of the rotomolded part has a good effect on the fine structure of the mold cavity surface, and the rotomolding method can make the product quite exquisite and beautiful. Therefore, it is often used to produce products with greater ornamental value, especially toys such as pony, dolls, toy sand boxes, mannequin models, and handicrafts.
4, all kinds of large or non-standard rotomolded parts
There are many kinds of boxes, shells, large pipes and other parts, such as racks, machine casings, protective covers, lampshades, agricultural sprayers, furniture, canoes, camping vehicles, canopies, sports fields. Installations, planters, bathrooms, toilets, telephone rooms, advertising display boards, chairs, highway isolation piers, traffic cones, river buoys, anti-collision cylinders, and building construction barriers.
Our company has long-term customized all kinds of rotomolding molds and rotomolding products for domestic and foreign customers. We can design molds according to drawings or samples provided by customers and we can process all kinds of rotomolding products for customers.