Technical News
Explore practical guidance on compression molding, rubber and silicone injection molding, and machine selection. Articles cover melamine tableware, urea toilet seats, brake pads, EVA foam and composites, with insights into materials, molds and production conditions.
Recent Technical Articles
Read the summaries, then select an article to open the full guide. For earlier posts, use All Articles / Monthly Archive.
Why Must Both Levels of a Double-Layer UF Toilet Seat Press Vent, Close and Open Together?
A double-layer UF toilet seat press needs more than two stacked tools. See how synchronized venting, closing and opening affect tool pairing, operator flow, acceptance and machine selection.
September 29, 2026/by tw.hanchangWhy Can Small Bakelite Insulation Parts Require a Large Thermoset Transfer Molding Press?
Small Bakelite parts do not always belong on a small press. Multicavity tooling, projected area, full-shot charge, pot-and-plunger requirements and insert-handling clearance determine whether a standard or large thermoset transfer molding press is the better fit.
September 28, 2026/by tw.hanchangWhen Should Rubber and Silicone Parts Move from Hand Trimming to Hydraulic Die Trimming?
Hydraulic die trimming is a strong choice when rubber or silicone parts repeat the same accessible flash profile and can be located and supported during the cut. This guide compares hand and die trimming, explains common trim defects and lists the part and tooling data required for an RFQ.
September 27, 2026/by tw.hanchangDoes a Deeper Stainless-Steel Pot Only Need More Tonnage? Select a Deep Drawing Press by Draw Ratio and Stages
Deep cookware cannot be selected by press tonnage alone. This guide explains draw ratio, one draw versus redraw stages, wrinkle and split mechanisms, and the force, stroke, tooling and ejection information buyers should provide.
September 26, 2026/by tw.hanchangWhy Fast, Synchronized Mold Opening Matters in EVA Foam Compression Molding
After heating and pressure holding, an EVA foaming press must open the designated mold layers rapidly and together. This guide compares double-layer station logic with multi-layer opening, acceptance checks, and buying decisions.
September 25, 2026/by tw.hanchangMulti-Layer or Multi-Station Brake Pad Hot Press? Choose by Product Mix and Operator Flow
A multi-layer brake pad press stacks tooling levels for batch output, while a six-station press shortens the operator route between neighboring stations. Compare product mix, tools, cycle, labor and site requirements before selecting either layout.
September 24, 2026/by tw.hanchangCan a Two-Color Melamine Molding Machine Run Single-Color Jobs? Plan by Order Mix and Tooling
Han Chang’s two-color melamine press can disable the two-color function and use either upper mold for suitable single-color work. Compare order mix, tooling fit, scheduling and line requirements before choosing it over dedicated single-color capacity.
September 23, 2026/by tw.hanchangUpper or Lower Ejector for a Composite Compression Moulding Press? Choose by Part Retention, Tooling and Handling
Upper or lower ejection should follow the mold half that retains the composite part, acceptable contact areas and the operator’s removal path. Learn how ejector stroke and force differ from press tonnage and sliding-mold access.
September 22, 2026/by tw.hanchangThermoset Transfer Molding Is Not Ordinary Plastic Injection: How the Pot, Plunger and Closed Mold Work
A pot-type thermoset transfer molding machine closes the mold first, then uses a hydraulic plunger to move a measured PF/Bakelite or UF charge through runners and gates. Compare the process with plastic injection and direct compression before selecting a press.
September 21, 2026/by tw.hanchangHow Does Automatic Core Pulling Affect Hinge Holes and Demolding in One-Cavity Urea Toilet Seat Molding?
A first-party machine sequence for core insertion, hinge-hole formation, mold opening, core withdrawal and manual removal in one-cavity urea toilet seat molding.
September 20, 2026/by tw.hanchangBefore Requesting Rubber or Solid Silicone Injection Equipment, Why Confirm Compound Feed Form?
Classify rubber strip, solid silicone strip and separately confirmed liquid-system requirements before injection equipment quotation.
September 19, 2026/by tw.hanchangAfter a Double-Layer EVA Foaming Press Opens, Why Record Removal and Cooling by Station?
Station records preserve mold, removal, cooling, measurement and release evidence after a double-layer EVA foaming press opens.
September 18, 2026/by tw.hanchang
