Every product is made with the help of the machines. While some are enormous, others are quite small but the contribution of both big and small equipment in the process of product-making is imperative and necessary. One of such equipment is the rotary molding machine. It comprises a cavity that is heated and filled with the weight of the material. It then rotates with the help of the two axes fixed perpendicularly, which causes the material to get softened and disperse, and then eventually it gets stick to the walls of the machine. For the thickness to be maintained, the mold continuously rotates throughout the heating process and also during the cooling process. The machine is also referred to as the spin-casting.
What equipment is used?
The basic parts of the machine involve an oven, cooling chamber, and spindles of the mold, which are later mounted on a rotating axis providing a uniform coating inside every mold. The molds are either made up of sheet steel or cast. The method of fabrication is usually induced by the size and its complexity, with the intricate parts being made from tools of the cast. Also, the aluminum molds are quite thicker than the usual steel ones, being a softer metal.
Types of machine
Some of the variants of the rotary molding are as follows:
- The rock and roll machine
- The clamshell machine
- The vertical machine
- The shuttle machine
- The swingarm machine
- The carousel machine
What are its advantages?
Some of the advantages of using the rotary molding are:
- Lower cost of tooling: the low operating pressure grants the tooling to be made from low-cost metals such as aluminum
- The thickness of the wall is consistent: the rotation of the mold is constant which coats the walls evenly
- Double construction of the wall: convoluted dual-wall open containers are processed without any secondary processing
- High-strength: thick corners can be formed which reduces the overall risk of failure in the concentrated stress-points
- Appearance: the delicate metal which is used for rotomolding can very easily accommodate outer finishing like symbols, lettering, and logos
- High-stability: the material used for molding is not exposed to the exterior pressure reducing the risk of defects and increasing the stability
- Higher durability: the parts are molded as a solid piece which eradicates the need for joining which includes welding creating weak spots
What is the price?
The price of the biscuit production machine is an enormous sum of money which involves both, the tooling and the rate of production. Analyzing the volume of yearly production is the best way to decide whether the machine will be a good fit or not. If the requirement is around 3000 parts and below the rotomolding is of total use for the producer. The cost of tooling is approximately $150000 per year and the rate of production is about 2 parts in an hour making the price per cost approximately $35-$40. The overall price even depends on the materials which are being used simultaneously and their quality and durability as well. Some of the companies even provide the facility of credit buying and charge an EMI each month. This reduces the stress of paying a huge amount at a time for the buyer.
Thus, the use of a rotary molding machine is going up because of the dramatically rising need in the target market and more and more people are getting involved in the production using the same.