Plastic injection molders will help you choose the size of the machine fit to give you the best result. However, a project designer or engineer can make calculations and give a good estimate on everything you need to know about your preferred plastic injection molding machine. By understanding the right size of machine you need for your production, you can choose the right molder that meets your requirements.
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How are molding pressed rated or classified?
Most plastic injection companies will list molding equipment on their website. Below is a list of presses that serve a broad base of industries:
Quantity Press Size
3 68 Ton Injection Molding Presses
5 123 Ton Injection Molding Presses
5 154 Ton Injection Molding Presses
5 233 Ton Injection Molding Presses
4 400 Ton Injection Molding Presses
What does this mean?
Plastic injection molding presses are classified based on tonnage or the clamping pressure of force. Presses can be in different sizes ranging from 5 tons of clamping pressure to over 4000. A large machine has a higher press ton rating.
A machine with a press rate of 68 tons can deliver 68 tons of clamping pressure. The pressure holds the mold down during the injection process; if the mold is not held down securely and accurately, it may lead to a defect in the quality of the product. Inaccurate pressure can cause flashing( a process where excess material appears on the edge of the product).
Pressure also affects the viscosity of the plastic used in the project. Melt Flow Index or MFI is used to measure the seamless flow of the melt of a thermoplastic polymer. Plastic compounds have different reactions to pressure depending on their MFI. A higher MFI requires higher pressure.
Other factors to consider are the different types of injection molding machines which include – hydraulic, electric, and hybrid plastic injection molding. You need to decide which of these processes is right for you.
How can I identify a molder that is right for my project?
After arriving at an estimate of the press size, you will nerf to source for the best company where you can get the best plastic injection molding machine that will fit your requirement.
However, to get the best result, molders with a high number and wider selection of press sizes will be able to meet your requirement and produce your items. Find the best plastic injection molding company for designing, building, and running mold. With their experience, they’ll be able to maximize the manufacturing process and help to save production costs for your project.
Your plastic injection holder will determine which machine would best fit the requirements of your project. Larger presses can contain bigger and multi-cavity molds; this will help in reducing the cost of each part. However, the prices of bigger molds are higher; therefore, selecting the right press size can balance the upfront tooling expenses with long-term manufacturing costs
