Clamping Time – Closing Time
Clamping time refers to the time from when a mold is completely closed until when clamping force is pressurizing. Clamping time does…
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Technology
Lifting Eye Bolts
A bolt on which a crane wire is hooked when installing a mold to the...
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31
Jan
Jan
Technology
Guide Rails
A part that functions as a guide for a slide core, preventing floating of a...
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31
Jan
Jan
Technology
Injection Molding
One of the molding methods for plastics. A molding material is mixed in the injection...
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30
Jan
Jan
Technology
Counter
A counter that counts the number of ejections after the completion of mold clamping when...
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30
Jan
Jan
Technology
Guide Pins / Guide Bush
Guide pin and bush are have a pin and a cylindrical part that function as...
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30
Jan
Jan
Degassing
Degassing is the process to release the water and air contained in a molding material, the gas generated during molding, and the…
Undercut
A shape that prevents a part from being removed in the opening direction of a mold after molding. If a part has such a shape or…
Molding problems and Solutions
This chapter explains molding defects such as sink mark, warping and whitening and their prevention. Molding defects are caused by related and complicated reasons as follows:…
Property of Plastics
This chapter explains the properties of plastics and the characteristics of typical material in mold processing. Property of Plastics Plastic properties are classified by 5 criteria.…
Type of Plastics
This chapter explains the difference between thermoplastics resin and thermosetting plastics, and the difference between crystalline plastics and amorphous plastics. Thermoplastics resin This type of plastics…
Mechanical Structure of Molding Machine
The injection molding machine consists of an injection carriage, a mold and a clamping device. This chapter explains the structure of the primary elements. Injection Carriage…
Setting Molding Condition
This chapter explains each molding condition (injection, temperature, and ejector) Molding conditions differ depending on each molding material. A good part is made only with the…
Installation of Mold
This section will explain the key points to consider when mounting molds onto a plastic injection molding machine. Mold clamp Consider mounting the mold onto the…
Dimension of Parts
This chapter explains the molding (part) shrinkage rate, draft angle and flow path ratio that need to be considered when determining part dimensions. Part Shrinkage Rate…
