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Heating Plate Applications in Plastic Mold Industry
Precise constant temperature heating plays a vital role in plastic mold trial production, preheating, stress relief and post-forming annealing. Our heating plates adapt to injection mold preheating, plastic blank hot forming, mold runner thermal balance and finished plastic part stress elimination. Featuring large uniform temperature area, wide adjustable temperature range, wear-resistant hard surface and stable long-time heating performance, they effectively reduce injection shrinkage, part warpage, surface sink marks and internal residual stress, greatly improving plastic product dimensional accuracy and appearance qualification rate.
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Injection Mold Integral Preheating Heating Plate
Working Condition: Whole mold preheating before ABS/PC automotive part injection molding to shorten trial run time and stabilize melt flow
Configuration: 800×600mm thick cast aluminum plate, 60–180℃, uniformity ±1.0℃, high load-bearing hard anodized surface
Application Results: Mold preheating time cut by 55%, product sink mark defect rate dropped from 9.1% to 1.3%, injection cycle more stable
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Plastic Shell Post-Molding Stress Relief Annealing Station
Working Condition: Constant temperature annealing for thin-wall PP electronic casings to release internal injection residual stress
Configuration: 700×500mm alloy heating plate, 50–120℃, uniformity ±0.7℃, anti-scratch matte surface
Application Results: Post-assembly warpage reduced by 82%, casing cracking rate under temperature shock test eliminated completely
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Thermoforming Plastic Blank Hot Forming Heating Plate
Working Condition: Even heating for PET/PS blister sheets before vacuum thermoforming packaging molds
Configuration: 900×550mm multi-zone heating plate, 40–160℃ segmented control, full plate uniformity ±0.9℃
Application Results: Blister wall thickness difference controlled within 0.12mm, thin puncture reject rate decreased by 70%
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Mold Runner & Gate Thermal Balance Heating Platform
Working Condition: Local constant temperature heating for multi-cavity mold runners to balance melt filling speed for small precision plastic gears
Configuration: Custom split aluminum heating modules, 80–220℃, local precision ±0.4℃, fast heat conduction
Application Results: Multi-cavity gear size tolerance deviation narrowed to ±0.008mm, batch size consistency improved drastically
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