Large Twin-Cylinder Hot Compression Molding Press
Han Chang builds 1200–2000-ton twin-cylinder hot compression molding presses for bathtubs, long tabletops, washbasins and large artistic products. Configured for SMC/BMC composites, phenolic, rubber or silicone compounds, the press combines heating, compression, mold venting and pressure-hold curing.
Machine advantages
For a large mold, tonnage is only part of the buying decision. You also need the right tool footprint, opening clearance and molding sequence. We build around those requirements, bringing the force, mold space and process motions together to support consistent quality and improve production efficiency.
Specify force and mold space together
The 1200–2000-ton build range serves large compression tools with substantial forming-force requirements. Platen dimensions, daylight and stroke are configured with the tool: a long tabletop needs the appropriate footprint, while a deep bathtub mold also needs opening and part-removal clearance.
Venting that fits the curing process
After initial pressing, the mold opens and closes to release gases before the pressure-hold curing stage. Coordinating this step with compound flow and reaction helps reduce trapped-gas effects on filling and surface formation, supporting consistent molded-part quality.
Build around your compound
A hydraulic press for SMC or BMC compression molding and a press for phenolic, epoxy or rubber molding need a process configuration suited to the selected formulation. Han Chang configures heating, forming force and molding motions around the compound and tool, so the equipment matches the product you intend to manufacture.
Make large-tool production more practical
Tool mounting, closing travel and part removal all influence the working cycle. Configuring platen size, daylight and stroke together with the molding motions helps production run more smoothly and improves efficiency, while keeping the investment focused on the capacity and space the job actually needs.
Compression, venting and curing
See Han Chang hot compression molding equipment in operation.
Official Han Chang video · Click to watch
Prepare and load the charge
Prepare the required compound quantity and manually place the SMC sheet charge, BMC bulk charge, molding powder or rubber compound into the mold at its specified process temperature. Charge placement follows the part geometry and filling requirements.
Close and apply forming force
The tool closes and hydraulic force presses the heated compound into the cavity. Material flows across the mold and into the product features; the pressing motion is configured for the compound, part shape and tool.
Open and close the mold to vent
After initial pressing, mold-opening and closing motions allow gases to escape before pressing continues. The venting sequence is matched to the compound reaction and cavity-filling behavior.
Hold heat and force for curing
Maintain the specified thermal and pressing conditions as the resin cures or the rubber or silicone compound vulcanizes or crosslinks. Holding time and the molding sequence depend on the formulation and part thickness.
Open and remove the molded part
Release the pressing force, open the tool and remove the part for any required trimming and inspection. The press configuration accommodates the opening space and removal approach needed for a large or deep molded product.
Materials and large-part applications
Molding materials
Sheet molding compound — SMC
Glass-fiber-reinforced thermoset sheet compound offers a route to large sanitary parts, shower trays, building panels and water tank panels. Sheet cutting and charge placement suit the cavity, while the press configuration matches the large tool, opening space and forming force.
Bulk or dough molding compound — BMC/DMC
BMC/DMC compounds suit compression-molded parts with curved surfaces, ribs and detailed geometry. Select press tonnage from the compound’s molding pressure and total projected cavity area, then match platen dimensions to the tool footprint and mounting space. This brings the forming force and tooling requirements together.
Glass-fiber-reinforced polyester and vinyl ester composites
Glass-fiber-reinforced unsaturated polyester and vinyl ester molding compounds offer routes to large covers, panels, sanitary products and corrosion-resistant composite parts. Common compression-molding forms include SMC sheets and BMC bulk charges. Select the charge form, tool and hot-press conditions to suit the part geometry and filling requirements.
Phenolic molding compound — PF / Bakelite
Configure a hot compression press for phenolic industrial parts where heat resistance or electrical insulation is required. The material grade and product design establish the required end-use properties, while the press is matched to the compound and tool.
Melamine molding compound — MF
Heat-curing melamine compounds provide an application route for large trays, platter-type parts and special molded shapes. Tool footprint and required forming force determine whether a large twin-cylinder press is the appropriate production format.
Urea-formaldehyde molding compound — UF / UMC
Urea-formaldehyde (UF/UMC) molding compound cures under heat and pressure in the mold to form sanitary components, insulating parts and other molded products. Han Chang configures the large twin-cylinder press around the tool dimensions and forming force needed for the selected UF molding application.
Epoxy molding compounds and heat-curing composites
Compression-curing epoxy formulations and reinforced compounds offer routes to industrial insulation, structural panels and special molded components. Heating and pressing conditions are configured for the selected formulation.
Rubber and solid silicone compounds
Heat-vulcanizing or heat-crosslinking rubber and solid silicone compounds can be used for large gaskets, seals, sheets and industrial compression-molded products. The cure behavior and tool geometry guide the press configuration.
From SMC sheet charges and BMC/DMC bulk compounds to molding powders and rubber compounds, Han Chang matches heating, forming force, mold venting and cycle motions to material flow, cure behavior and tool geometry. The result is a large twin-cylinder press configured for your production requirements.
Large molded products
Bathtubs and large molded sanitary products
Bathtubs made from suitable hot compression molding formulations are a main application for this press. Deep sanitary tools need both forming force and clearance for the mold and finished part. SMC shower trays offer a related composite molding development route.
Long tabletops and large work surfaces
Long tabletop molds require an appropriate platen footprint, with force selected from the material process and projected molding area. Suitable heat-curing formulations allow the outline, edges and product features to be formed in a tool for furniture and large work-surface applications.
Washbasins and composite basin bodies
Basin surfaces, rims and corners require the compound to fill the cavity effectively. Mold-opening venting followed by pressure-hold curing supports this process. SMC/BMC composite washbasins can be developed around the basin dimensions, tool geometry and selected formulation.
Large artistic objects and decorative shapes
Large artistic objects, relief panels and shaped decorative components can be developed with compression-curable materials and purpose-built molds. Shape depth, tool dimensions and the part-removal direction guide the required press space.
Building panels, water tank panels and industrial covers
Glass-fiber-reinforced thermosets offer further development routes for architectural panels, sectional water tank panels and large industrial covers. Ribs and curved features bring filling requirements into the selection alongside projected area and mold footprint; the formulation and part design establish the required service properties.
Tonnage and press specifications
Each large twin-cylinder press is built to order within the 1200–2000-ton range. The following parameters define the equipment configuration for your product and mold rather than a fixed catalog model.
| Specification | Configuration |
|---|---|
| Structure and manufacture | Large twin-cylinder hot compression molding press; made to order |
| Forming-force range | 1200–2000 tons |
| Platen / press-bed dimensions | Configured for mold footprint, mounting and working space |
| Daylight and stroke | Configured for mold height, part depth and removal clearance |
| Tool and heating configuration | Matched to mold dimensions and compound curing requirements |
| Molding motions | Typically close and press → open/close to vent → hold and cure → open; customized to the process |
With an existing tool, start with its dimensions, height and projected molding area. For a new product, a photo or drawing, approximate dimensions and compound name are enough to begin the discussion. Platen size establishes tool space; tonnage establishes available force. Both must work with the required daylight and stroke.
Built around your mold and production
Han Chang’s made-to-order scope covers more than machine size. Heating, pressing, venting and holding motions are configured for the selected compound, bringing the requirements of glass-fiber composites, molding powders or rubber compounds into the equipment specification.
Mold footprint, mounting requirements and part-removal clearance guide platen dimensions, daylight and stroke. Combining these with the required forming force makes the specification useful for long tabletops, deep sanitary parts and large special shapes.
Forming force, platen size, daylight, stroke, heating requirements and custom motions are key press-cost drivers. Tooling, charge preparation, part handling and factory installation also affect the overall project budget. Compare the proposed configuration and supply scope, not tonnage or purchase price alone.
Buyer questions
Which materials can a Han Chang large twin-cylinder press process?
Han Chang can configure the press for SMC, BMC/DMC, glass-fiber-reinforced unsaturated polyester and vinyl ester composites, phenolic PF/Bakelite, melamine MF, urea-formaldehyde UF/UMC, epoxy molding compounds, rubber and solid silicone. The relevant formulations must be suitable for compression molding with heat curing, vulcanization or crosslinking. The selected compound and mold determine the equipment configuration.
What do SMC, BMC/DMC and FRP/GRP mean in compression molding?
SMC is sheet molding compound, while BMC/DMC refers to bulk or dough molding compound. FRP means fiber-reinforced plastic; GRP specifically means glass-fiber-reinforced plastic. For example, glass-fiber-reinforced polyester SMC combines polyester resin and glass fibers in sheet form and is also a GRP material. Han Chang configures the hot press for the compound’s flow and cure behavior, tool dimensions and required molding pressure.
How does the twin-cylinder press compare with the single-cylinder press?
Han Chang builds large twin-cylinder presses from 1200 to 2000 tons and large single-cylinder presses up to 1200 tons. Both are made to order. Start with the required forming force, then match mold space, daylight, stroke and molding motions. Within their shared 1200-ton range, tool mounting and part-removal requirements help guide the choice of single- or twin-cylinder configuration.
How do I select tonnage and platen size for a large mold?
Tonnage is the available forming force; platen size is the working footprint for the tool. Required force depends primarily on the compound’s molding pressure and total projected cavity area, including all cavities and their layout in a multi-cavity tool. Select platen dimensions for the mold footprint and mounting space. Long tabletop tools need both a suitable footprint and forming force, while deep basin molds also need adequate daylight, stroke and part-removal clearance.
What is the molding sequence, and how does the press vent?
The typical sequence is charge loading, mold closing and pressing, mold-opening and closing venting, pressure-hold heat curing, then mold opening and part removal. Venting releases gases through the opening and closing of the mold before subsequent pressing. Its timing and the holding stage are configured for compound reaction, flow and part geometry.
Can this press make bathtubs, tabletops and washbasins?
Yes. The press can produce bathtubs, long tabletops, washbasins and large artistic objects using compounds and tools suited to hot compression molding. Further composite applications include SMC shower trays, building panels, water tank panels and industrial covers. Han Chang matches forming force, heating, venting and pressure-hold curing to the selected compound and mold, with opening and part-removal space configured for large or deep products.
What determines the price of a custom compression molding press?
Within the 1200–2000-ton build range, price depends on forming force, machine and platen dimensions, daylight, stroke, heating requirements and the complexity of the specified motions. Tooling and charge or part-handling arrangements also affect the total production investment. Compare manufacturer quotes against the same equipment requirements and clearly defined supply scope.
Can I request a manufacturer quote before I know the required tonnage?
Yes. Send Han Chang a product photo or drawing, approximate dimensions and the compound name. Existing mold dimensions are helpful if available. We can discuss the forming force, platen space and molding configuration from those starting points, then provide an equipment quote once the specification and supply scope are defined.
Let’s specify the press for your large molded product
Planning composite sanitary products, long tabletops or another large compression-molded part? Send Han Chang your product drawing, photo or compound requirements. Discuss a 1200–2000-ton twin-cylinder press with the mold space and process configuration your production needs, and request a manufacturer quote.
