Baijun Machinery specializes in hot pressing equipment, precision stamping equipment, and powder forming equipment.
(National High-Tech Enterprise)
Product Description
I. Core Application Areas
The high-precision four-column, lower-cylinder hot press molding machine combines the "rigidity of its four-column structure," the "stability provided by lower-cylinder drive," and the "adaptability to hot pressing processes," making it widely used in precision molding and mass manufacturing—serving a variety of high-value industries.
1. Rubber and Thermoset Plastic Products
It is the core molding equipment for rubber products (such as bottle caps, seals, and tires) and thermoset plastic products (like phenolic resin parts). For example:
- Laboratory/Small-Scale Production: A below-100-ton, bottom-cylinder type flat vulcanizing press designed for pressing rubber samples or small-batch rubber products (such as sealing rings), enabling the vulcanization reaction (curing and shaping) of rubber through heat-and-pressure processing.
- Large-scale production: A few-hundred-ton, bottom-loading hot press machine designed for the thermoforming of large rubber products such as tire treads and rubber shock absorbers, ensuring product density and dimensional consistency.
2. Composite Materials and Protective Products
Suitable for hot pressing molding of composite materials such as carbon fiber, glass fiber, and PE, this equipment is critical for new energy, aerospace, and protective gear applications.
- In the new energy sector: a 315–800-ton lower-cylinder thermal compression molding machine, designed for manufacturing PE bulletproof helmets (thermal pressing enables interlayer bonding of composite materials, enhancing impact resistance) and graphite crucibles (specifically tailored for sintering lithium-battery anode materials, offering high density and exceptional shatter resistance).
- Aerospace: Rapid molding of carbon fiber prepregs (e.g., for wing skins, satellite brackets) using a downward-cylinder, upward-pressure process, ensuring precise fiber orientation and dimensional accuracy (tolerance ±0.05 mm), thereby meeting the demands for "lightweight design + high strength."
- Protective Equipment: An 800-ton bulletproof insert molding machine designed for hot stamping high-hardness steel plates or composite material inserts, capable of withstanding impacts exceeding 1500 MPa—ideal for applications such as military-grade bulletproof vest inserts.
3. Hot Press Molding of Metal Products
For products such as metal sheet metal, heads, and tank bodies, thermal pressing is used to reduce forming difficulties and enhance precision.
- Automotive Manufacturing: Large-scale, bottom-loading hot press forming machines (e.g., 500-ton or larger) are used to produce automotive body panels such as doors and hoods, as well as agricultural vehicle components. These machines utilize hot stamping at temperatures ranging from 200°C to 300°C to achieve precise plastic deformation of metal, ensuring superior roundness and dimensional accuracy—guaranteed within an error margin of ±0.1 mm.
- Minsheng Metal Products: Specializing in products such as boiler heads (including LPG tank bodies, stainless steel washbasins, and bathtubs), we utilize a bottom-cylinder hot pressing process to achieve metal stretching and bending—particularly for the hemispherical structure of the heads—ensuring superior sealing performance with zero leakage.
4. Eco-friendly and People's Livelihood Products
Focusing on the molding of green materials to meet the demands for "plastic reduction" and "environmental protection":
- Plant-fiber eco-friendly products—such as disposable fast-food containers, instant noodle bowls, plates, and more—are created by using a down-cylinder hot-press molding machine to shape plant fibers (like bamboo or rice husks) into durable forms. The process involves applying heat to bond the fibers together, resulting in biodegradable, pollution-free items.
- Sponges and polymer materials—such as sofa cushion foam and PC/PET plastic components like phone holders—are shaped and densified using heat-and-pressure techniques, enabling precise adjustments to their density and form (e.g., molding the sponge). This process ensures that everyday products meet both comfort and functionality requirements.
5. Electronics and Home Appliance Panels
For the molding of precision panels used in IMD/IML in-mold decoration and other applications, covering industries such as home appliances, electronics, and automotive.
- In the home appliance sector: Control and decorative panels for rice cookers, washing machines, and microwave ovens (such as PET/PC sheet thermoforming) are produced by heating the material with far-infrared heating elements, followed by instant molding under downward-cylinder pressure—ensuring both the panel’s glossy finish and precise dimensions (with an error margin of ±0.02mm).
- Electronics & Communications: Mobile phone back covers, computer keyboards, and landline phone panels (such as mobile phone lenses made using IML technology) can be produced in multiple specifications simply by changing the molds—for example, back covers tailored to different phone models. We also support high-volume production, with an hourly capacity of 50 to 100 units.
II. Core Features (The Combined Advantages of the Under-Cylinder and Four-Column Structures)
1. Four-column under-cylinder structure: high rigidity, high precision
- Structural Design: The machine features a three-beam, four-column structure (with one fixed crossbeam at the top and one at the bottom, supported by four vertical columns in the middle). It employs a lower-cylinder drive system—where the hydraulic cylinder is positioned at the base of the equipment—to push the moving worktable upward, applying pressure. This robust design offers 20%–30% higher rigidity compared to single-column models, making it exceptionally resistant to eccentric loading (ideal for high-tonnage applications). Additionally, the parallelism accuracy between the upper and lower working surfaces can be maintained within 0.08 mm—or even tighter at 0.05 mm or less for premium models—while ensuring smooth, vibration-free slider movement. This design effectively prevents mold damage or workpiece deformation caused by uneven loading.
- Spatial advantage: The lower-cylinder design ensures a compact equipment structure (occupying 15%-20% less floor space compared to the upper-cylinder type), making it easy to move or rearrange within the workshop. It also allows for convenient mold installation and replacement, reducing mold-change time by 20%-30%. This design is particularly suited for processes that require upward pressure, such as flat plate vulcanization and composite material compression molding.
2. High-precision hot-press control: Precise matching of temperature and pressure
- Temperature Control: Utilizes heating elements or hot plates (some models feature far-infrared radiation) for rapid temperature rise—reaching up to 280°C within just 30 minutes. Thanks to the advanced PID intelligent temperature controller, the system allows precise adjustment from ambient to 300°C, with a temperature accuracy of **±2–5°C** (for high-end models, this precision is as tight as ±1°C). For instance, during IMD/IML panel molding, it’s crucial to precisely control the heating temperature of the sheet material (e.g., PET or PVC—at around 180°C)—ensuring the material softens sufficiently to allow smooth shaping without any wrinkles or distortions.
- Pressure Control: Utilizes a cartridge valve-integrated hydraulic system (or servo-electric cylinder) to deliver stable pressure output with minimal impact. It supports two operational modes—constant pressure and fixed stroke—for processes such as the "pre-pressure-main pressure-hold pressure" cycle for composite materials, or the "vulcanization-hold pressure-demolding" process for rubber products. Pressure ranges from 1 ton (for small electronic components) up to 1000 tons (for large metal parts), with an accuracy of **within ±0.1 MPa**. For instance, during the thermoforming of a 315-ton bulletproof helmet, maintaining a consistent pressure level—such as 250 MPa—is critical to ensure the helmet’s superior impact resistance, meeting the requirements of GB 11810-2022 standards.
3. Process Flexibility: Adaptable to Multiple Materials and Specifications
- Mold Compatibility: Supports rapid mold changes (e.g., in IMD/IML panel molding machines, allowing production of different mobile phone cover models after switching molds), and is compatible with a wide range of materials—including rubber, composites, metal, plant fibers, and more. For instance, a 100-ton bottom-plunger hot press machine can produce either rubber sealing rings (φ10mm) or plant-fiber fast-food containers (200mm × 150mm) simply by swapping its molds.
- Program and Process Settings: Equipped with a PLC programmable controller, the system can store 50 to 100 sets of process parameters, including mold numbers, temperature curves, pressure profiles, and holding-pressure durations. When switching products, operators simply recall the corresponding program to seamlessly execute multi-stage actions such as "rapid upward movement—slow pressurization—pressure-holding curing—quick return." For instance, during the molding of carbon fiber prepregs, the process requires setting up a sequence like "heating to 150°C → applying pressure at 300 MPa → holding pressure for 10 minutes → cooling down to 50°C," which the PLC will then automatically carry out.
4. Safety and Operational Convenience
- Safety Protection: Equipped with mechatronic safety devices (such as a support circuit for the lower cavity of the cylinder and an interlock circuit for the upper and lower cavities of the cylinder) to prevent the slide from accidentally dropping. Additionally, there’s a through-beam optical sensor system (covering the moving table area), which instantly stops the equipment when a person or object enters the hazardous zone (response time < 0.1 second). Dual-button operation ensures safe handling—when manually loading or unloading materials, both buttons must be pressed simultaneously to start the machine, effectively preventing accidental activation.
- Ease of Operation: The device features a user-friendly touch-screen interface (as mentioned in Document 8, which highlights "intuitive and straightforward operation"). Users can directly input parameters such as pressing force, pressing speed, insertion depth, and holding time, while the system provides real-time feedback on equipment status—like temperature, pressure, and stroke. For instance, when producing plant-fiber fast-food containers, operators simply enter the settings on the touch screen—such as "10 tons of pressure, 120°C temperature, and 30 seconds of holding"—and the machine automatically completes the molding process.
5. Durability and Ease of Maintenance
- Durability: Equipped with advanced cylinder sealing components, such as NOK seals, ensuring high reliability and extending service life—up to twice as long as standard seals. Features an automatic rail lubrication system that regularly applies oil, significantly reducing rail wear and boosting lifespan by 30%. Additionally, selected models incorporate servo electric cylinders, offering exceptional longevity—up to five times longer than conventional cylinders—along with outstanding repeatability accuracy of ±0.02mm.
- Maintenance convenience: The equipment features a simple design (four-column, lower-cylinder type), making it easy to replace wear-and-tear components such as seals and heating elements. Additionally, 24/7 comprehensive after-sales support—including the "lifetime maintenance" service mentioned in Document 9—ensures rapid repairs in case of equipment failure, minimizing downtime to less than 4 hours.
Summary
The high-precision four-column, bottom-cylinder hot press is the core equipment for "upward-pressure precision molding," boasting features such as the "rigidity of its four-column structure," the "stability provided by bottom-cylinder drive," and "precise control of both temperature and pressure." These attributes enable it to meet the dual demands of "mass production" and "high precision" across diverse industries—including rubber, composite materials, metals, and eco-friendly products. As sectors like new energy, environmental protection, and electronics continue to grow rapidly—driven, for instance, by rising demand for lithium-battery anode materials and the increasing adoption of plant-fiber-based fast-food containers—the device will remain a critical enabler of "precision manufacturing," delivering efficient, reliable, and environmentally friendly molding solutions to businesses.
Main performance and features of the equipment:
a. High temperature control accuracy of ±1°C;
b. The hot plate temperature difference can be as low as ±3°C at best;
c. The hot plate flatness accuracy can reach up to ±0.02 mm;
d. Multi-stage pressure control, with hold time set separately for each pressure stage;
n. Multiple venting function;
e. Multi-stage temperature control;
f. Scheduled heating function;
g. Menu-based save/restore functionality for product production data;
h. 1000-second ultra-long holding pressure function;
I. Heating methods: Optional electric heating tube heating or mold temperature controller heating;
j. Optional vacuum function;
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High-Precision Four-Column Bottom-Cylinder Hot Press Molding Machine
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Tel: 0757-88816080
Mobile: 180-2225-3860(Mr. Guan)
Email: 1961666888@qq.com
add: No. 8, Self-compiled Building, Baidouli Factory, Industrial Zone, Shuaibian Economic Cooperative, Laobian Community, Danzao Town, Foshan City, Guangdong Province
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