Three-Cylinder Long-Platen Hot Press
Han Chang’s Three-Cylinder Long-Platen Hot Press is a hydraulic compression molding press for long seals, elongated rubber parts and panels. Three lower hydraulic cylinders work together to raise one shared long platen, supporting the mold during closing, heating and pressure holding. The press processes rubber, silicone, composites and phenolic (Bakelite) molding materials.
Machine advantages
Choose this long-platen press when mold support along the length matters as much as total pressing force. Mold-opening and closing venting helps release trapped gas during molding, supporting consistent quality. Custom platen dimensions, daylight and stroke bring the working space into line with your tooling and manual loading and unloading needs.
Support long molds with a shared three-cylinder lift
Three lower hydraulic cylinders act on one long platen, combining mold support and upward pressing in a common working surface. This arrangement suits tooling laid out along the length of a seal, elongated part or panel.
Bring heat and holding force together for curing
The closed mold receives heat and compression during the holding stage. Rubber and silicone are vulcanized, while suitable composite and phenolic molding materials cure under their required conditions. The long platen supports the tooling used for these elongated products.
Release mold gas through opening-and-closing venting
Mold-opening and closing movements help gas escape during the molding process. Combined with hot pressing and pressure holding, this venting function helps reduce the effects of trapped gas and supports consistent molded-part quality.
Fit the working space to the mold and operator
Platen dimensions, daylight and stroke can be customized. Matching them to the mold footprint and height leaves appropriate room for manual charging and part removal, making long-part handling more practical and improving working efficiency.
Long-platen compression and mold venting
See Han Chang hot compression molding equipment in operation.
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Load the mold manually
The operator places the rubber, silicone, composite or phenolic molding material into the mold, with the charge positioned to suit the part geometry.
Raise the platen, hot press and vent
Three lower hydraulic cylinders raise the shared long platen to close the mold. Heating, compression and pressure holding provide the required cure, with mold-opening and closing venting used during molding to release gas.
Open and unload manually
After curing, the mold opens and the operator removes the part. The product can then move to its subsequent trimming and inspection operations.
Materials and long-part applications
Applicable materials
Rubber and silicone | Long-part vulcanization
Compression molding serves long seals, elongated rubber parts and rubber or silicone panels. The long platen carries the mold, heat and pressure support vulcanization, and mold venting assists gas release.
Composites | Hot-cured panels
Composite panels that cure under heat and compression benefit from a mold-supporting surface matched to their elongated shape. Part length, mold footprint and cure conditions guide the platen and pressing-force selection.
Phenolic (Bakelite) | Thermoset boards and elongated parts
Phenolic molding materials cure in the heated mold to form board-shaped or elongated products. Matching the platen to the tool and the daylight to its height makes the press arrangement useful for both molding and manual part removal.
Heating, holding and venting conditions follow the actual molding material and part thickness. Select the compound and tooling for the intended composite or phenolic product application.
Long molded parts and panels
Long molded seals | Support the tool along the sealing profile
Long rubber or silicone seals for equipment mating surfaces call for tooling laid out along the part length. The shared three-cylinder platen supports that mold during hot compression, while opening-and-closing venting helps release gas from the cavity.
Elongated rubber pads and panels | Match the mold footprint
Long rubber pad strips and panel-shaped pads need a supporting work surface suited to their mold length and width. A customized platen accommodates the footprint, with heat and holding force providing vulcanization and suitable daylight allowing manual removal.
Composite covers and phenolic insulation boards | Hot press long panels
Long composite cover panels and phenolic insulation boards can be compression molded with suitable molding compounds and tooling. The long platen carries the panel mold during heating and pressure holding, while customized platen dimensions and daylight accommodate the tool and part removal. Materials and finished boards for electrical insulation must meet the intended electrical requirements.
Total press tonnage and selection
Choose from six total press tonnages, from 600 to 2400 tons, with customizable platen dimensions, daylight and stroke. Match force to projected molding area, cavity count and required molding pressure; match working space to the long mold and its handling needs.
| Selection item | Configuration considerations |
|---|---|
| Total press tonnage | 600 / 900 / 1200 / 1500 / 1800 / 2400 tons; each is the combined force of all three cylinders. |
| Cylinder arrangement | Three lower hydraulic cylinders raise one shared long platen. |
| Platen dimensions | Customizable to suit mold length, width and support requirements. |
| Daylight and stroke | Customizable for mold height, closing travel and manual unloading clearance. |
| Hot pressing and venting | Heating and pressure holding, with mold-opening and closing venting; conditions follow the material and part thickness. |
Start with a part drawing or photo, material and approximate length and width. If tooling is already available, include its footprint and height. Han Chang can discuss the total force, platen and daylight arrangement with you before preparing a quotation.
Long molds and production setup
Platen size addresses the mold footprint and support area. Total press force addresses the projected molding area, cavity count and required molding pressure. Considering both gives a more useful basis for comparing long-platen compression press configurations.
Manual charging and removal depend on the part length, mold height and space available after opening. Customized daylight and stroke help accommodate the handling approach alongside the hot-pressing requirements.
Buyer questions
What can the Three-Cylinder Long-Platen Hot Press produce?
Han Chang’s Three-Cylinder Long-Platen Hot Press produces long seals, elongated rubber parts and panels from rubber, silicone, composites and phenolic (Bakelite) molding materials. Three lower hydraulic cylinders raise one shared long platen, supporting elongated tooling for hot compression and curing.
How do the three cylinders support a long mold?
The three lower hydraulic cylinders work together to raise the same long platen. That platen carries the mold and applies upward closing force. Mold length, width, support requirements and total pressing force are considered together when selecting the configuration.
How does loading, mold venting and unloading work?
The operator loads material manually. Three lower hydraulic cylinders raise the platen to close the mold for heating, compression and pressure holding. Mold-opening and closing venting helps release gas during molding. After curing, the mold opens and the operator removes the part manually.
Do the 600–2400 ton figures refer to total press force?
Yes. The 600, 900, 1200, 1500, 1800 and 2400 ton options each refer to the combined force of all three cylinders, not the force of one cylinder. Select total force using projected molding area, cavity count and required material molding pressure, together with suitable platen dimensions, daylight and stroke.
What can be customized, and what determines the hot press price?
Platen dimensions, daylight and stroke can be customized. Price depends on total tonnage, working space and the hot-press configuration. Send Han Chang a product photo or drawing, material and approximate dimensions; an existing mold’s footprint and height help refine the configuration and quotation.
Choose a hot press built around your long mold
Send Han Chang your seal, rubber part or panel drawing to discuss mold support, total press force and handling space. Request a Three-Cylinder Long-Platen Hot Press quotation.
Reference videos and further reading
- Automatic hydraulic straightening press
- Large single-cylinder hot compression molding press
- Large twin-cylinder hot compression molding press
- Rubber Compression Molding Machine
- Guarded hot compression molding press
- Reference video: molding equipment ready to ship
- Reference video: Han Chang factory and equipment introduction
- Reference video: molding machine parts
