This is a shrinkage prevention molding method for thick-walled molded products that allows for a wide range of thickness settings.
"In general molding methods..." - When the wall thickness exceeds 4mm, deformation such as sink marks and warping occurs. - By adding foaming agents to the resin, sink marks can be prevented, but bubbles appear on the surface, creating swirl patterns and roughening the appearance. "With the counter-pressure method!" - A smooth surface of the molded product can be obtained, and due to excellent mold reproducibility, texture processing is also possible.
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■Principle of Counter Pressure Method Inject resin into the mold cavity ↓ Maintain a gas pressure within the cavity that is higher than the foaming pressure until just before the resin filling is complete, preventing the resin from foaming. Since the foaming rate is below 5%, there is almost no decrease in product strength due to the formation of a strong surface skin layer, resulting in physical properties comparable to solid molded products. ↓ Achieve a smooth surface on the molded product!
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■Features of the Counter Pressure Method - Significant reduction in shrinkage and warping of molded products. - Increased rigidity of molded products. - Appearance achieves a smooth surface comparable to solid molded products. - A wide range of wall thicknesses can be achieved in molded products. (Production molded products have wall thickness records of 5 to 18 mm) - Low filling pressure into the mold allows for a reduction in the size of the clamping force of the molding machine. - The mold has an airtight structure, which results in slightly higher costs and requires a gas control unit.
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We manage everything from design to planning, mold manufacturing, processing, assembly, storage, and delivery in a comprehensive manner. We are also happy to take on spot requests for design, planning, analysis, and more. Please feel free to consult with us first. [Machinery and Equipment] 2D CAD Design Creation: CADPAC CREATOR Design Automation: CADPAC WIN4 Co-create Software: OneSpace Designer Drafting (ME10) 3D CAD SolidWorks Parametric Technology: Pro-ENGINEER Wildfire Co-create Software: OneSpace Designer Modeling 3D CAE Autodesk Moldflow Adviser Advanced (mold flow analysis, 3D analysis) Mold Adviser Release 7.0 (mold flow analysis) Parametric Technology: Pro-Mechanica (structural and strength analysis) [Injection Molding Machines] 33 machines ranging from 35t to 1800t