500 Ton 25 Openings Continuous Feeding & Discharging Plywood Hot Press Machine
Main Components
Component | Description |
1. Main Frame | Integral or column structure, bearing 500 tons of pressure and machine weight, high rigidity, low deflection. |
2. Hot Plates | 26 plates (25 layers require 26 plates). Internal thermal oil channels, precision-machined surface for flatness and uniform temperature. |
3. Moving Platen | Connects main cylinders and hot plates, enables opening/closing, evenly transmits pressure to each layer. |
4. Main Cylinder System | Multi-cylinder arrangement (typically 4–6 cylinders), total pressure 500 tons, providing stable and uniform pressing force. |
5. Hydraulic Power Unit | Includes hydraulic pumps (multi-pump combination), oil tank, proportional valves, pressure sensors, safety valves, etc. |
6. Thermal Oil Heating System | Includes thermal oil boiler (or electric heater), circulation pump, piping, expansion tank, temperature controllers, etc. |
7. Continuous Feeding System | Upstream conveyor + automatic layer-by-layer pusher, synchronized with press opening, enabling 25-layer simultaneous feeding. |
8. Continuous Discharging System | Synchronized puller or discharge conveyor, automatically transferring finished boards to downstream equipment. |
9. CNC Control System | PLC + large touchscreen, supports fully automatic operation, recipe storage, data logging, and fault diagnosis. |
10. Safety Protection Devices | Light curtain, emergency stop, overpressure protection, overtemperature protection, leak detection, anti-fall mechanism, etc. |
Working Principle
This hot press operates on a continuous feeding/discharging + intermittent pressing hybrid mode. The working cycle is as follows:
1. Continuous Feeding Phase
The upstream conveyor and automatic board loader work together to feed glued veneer stacks into each of the 25 openings. The feeding process is synchronized with the press opening action, allowing multiple layers to be loaded simultaneously without waiting for the press to fully close.
2. Closing & Pressing Phase
After feeding, the hydraulic system activates the main cylinders (total pressure 500 tons), pushing the moving platen upward to close all layers at once. A proportional valve and pressure sensor closed-loop control enable a multi-stage pressure curve: fast closing → slow pressing → holding.
3. Hot Pressing & Curing Phase
Under set temperature (thermal oil heating, ambient–220°C) and pressure, the press holds for a specified duration, allowing the adhesive to fully cure and the board to densify.
4. Continuous Discharging Phase
After holding, the hydraulic system releases pressure and the moving platen descends. The automatic unloader simultaneously pulls or pushes all 25 finished boards out, directly transferring them to a downstream cooling turner or sanding line. Once unloading is complete, the next batch of veneer stacks is immediately fed in, forming a continuous feed/discharge cycle.
5. Temperature Maintenance
During loading and unloading, the hot plates maintain the set temperature (or with a minor drop), avoiding energy loss and time waste caused by frequent reheating.
Core Advantages
Advantage | Description |
1. 25-Layer High Output | Presses 25 boards per cycle, increasing output by 40–60% compared to conventional 10–15 layer machines. |
2. 500-Ton High Pressure | Meets high-pressure forming requirements for thick boards (15–30mm) and hardwoods (e.g., eucalyptus, oak). |
3. Continuous Feeding & Discharging | Loading and unloading without waiting for full press opening/closing, reducing line idle time by over 50%. |
4. High-Precision Temperature Control | Thermal oil heating, plate surface ΔT ≤2°C, control accuracy ±1.5°C, boards remain flat without warping. |
5. Programmable Pressure Curve | Multi-stage pressing + staged pressure release, adaptable to different adhesives and board structures, reducing blistering risk. |
6. Fully Automatic Operation | PLC + touchscreen, one operator for the entire line, greatly reducing labor costs. |
7. Seamless Upstream/Downstream Integration | Directly connects to assembly line, cooling turner, and sanding line for a continuous production line. |
8. Energy-Saving Design | Hot plates do not cool down during loading/unloading, reducing reheating energy consumption by 15–25%. |
9. High Reliability | Main hydraulic and electrical components from international brands, suitable for 24/7 continuous operation. |
Applications of Plywood
Application Area | Description |
Concrete Formwork | High-strength, water-resistant film-faced plywood for concrete pouring. |
Container Flooring | High-density, high-strength plywood for heavy loads and harsh transport conditions. |
Furniture Manufacturing | Eco-friendly, flat plywood for wardrobes, cabinets, tables, chairs, etc. |
Packaging Industry | Low-cost structural plywood for export crates and pallets. |
Truck & Trailer Flooring | Wear-resistant, anti-slip plywood for truck and trailer floors. |
Multilayer Solid Wood Flooring Substrate | Cross-laminated structure improves dimensional stability of flooring. |
Marine Interiors | Moisture-resistant, fire-retardant treated plywood for ship bulkheads and decoration. |
Stage & Exhibition Construction | Reusable, high-flatness plywood. |
Company introduction
We are Shandong MINGHUNG Wood Based Panel Machinery Co.,Ltd China factory and manufacturer of full sets of Plywood machinery and Veneer machinery. With many years production experience, advanced production technology,experienced workers and professional engineers, we can offer you the suitable, good and strong machinery for you.
Our Services
Service Item | Description |
1. Technical Consulting & Solution Design | Provide customized hot press and complete line solutions based on customer output, panel type, and plant layout. |
2. Manufacturing & Quality Control | In-house production with strict ISO9001 quality system; key components from well-known brands. |
3. Installation & Commissioning | Send engineers overseas for on-site installation guidance and commissioning to ensure proper operation. |
4. Operator Training | Systematic training for customer operators, including machine operation, PLC programming, and daily maintenance. |
5. Remote Technical Support | Long-term support via WeChat/WhatsApp/email/video for rapid fault response. |
6. Spare Parts Supply | Long-term supply of original spare parts, including seals, hot plates, hydraulic components, electrical parts, etc. |
7. Equipment Upgrading & Retrofitting | Provide value-added services such as automation retrofitting, heating system upgrades, and control system replacement. |
8. Warranty Policy | 12 months warranty for the whole machine (excluding wear parts), lifetime technical support. |
Request a Quote Today! OEM/ODM solutions available – Start your plywood business with competitive edge!
Whatsapp: +8618769900191 +8615589105786 +8618954906501
Email: osbmdfmachinery@gmail.com
