Precautions for installation of plywood hot press machine
As a key equipment on the plywood production line, the installation quality of the plywood hot press directly affects the performance, service life, production efficiency, and product quality of the equipment. Therefore, when installing a plywood hot press machine, it is necessary to strictly follow the following precautions.
1、 Preparation work before installation
（1） Site selection and preparation
Choose a flat, solid, and sufficiently load-bearing ground as the installation site for the hot press machine to ensure stability after installation and avoid deformation or damage caused by ground subsidence or uneven stress.
According to the size and operational requirements of the hot press machine, plan the installation site space reasonably, reserve sufficient operation and maintenance space, facilitate equipment installation, debugging, and future maintenance and repair work.
（2） Equipment inspection and acceptance
After the arrival of the equipment, the hot press machine should be opened and inspected in a timely manner to check whether the model, specifications, quantity, and accompanying parts, accessories, and technical documents of the equipment are consistent with the contract and packing list.
Carefully inspect the appearance of the equipment for any damage, deformation, or rust, especially important components such as hot pressing plates, frames, hydraulic cylinders, etc. If there are any problems, contact the supplier in a timely manner and negotiate solutions.
Conduct dimensional accuracy and positional tolerance testing on key components of the equipment to ensure compliance with design requirements and relevant standards, providing assurance for subsequent installation work.
2、 Key points to note during installation
（1） Basic installation
According to the design requirements and installation drawings of the hot press machine, carry out foundation construction and pre embed anchor bolts. The size and strength of the foundation should meet the load-bearing requirements of the equipment, and the position and depth of the anchor bolts should be accurate to ensure that the equipment can be firmly fixed on the foundation.
After the foundation concrete reaches the design strength, place the base of the hot press machine on the foundation and adjust the nuts of the anchor bolts to ensure that the levelness and elevation of the base meet the design requirements. The error of levelness should be controlled within the specified range to ensure that all components of the hot press machine are evenly stressed during operation.
（2） Component assembly
The assembly of the hot press machine should be carried out in the order from bottom to top and from inside to outside, installing the frame, hydraulic cylinder, hot press plate, heating system, cooling system, hydraulic system, electrical system and other components in sequence. During the assembly process, attention should be paid to the installation position and direction of each component to ensure consistency with the design drawings.
For the installation of important components such as hot press plates, special attention should be paid to adjusting their flatness and parallelism. The parallelism error between the hot pressed boards should be controlled within a very small range to ensure that the plywood can be uniformly stressed during the hot pressing process, thereby achieving good bonding quality. At the same time, it is necessary to ensure that the connection between the hot press plate and the hydraulic cylinder is firm and reliable, to avoid problems such as looseness or leakage during operation.
The installation of hydraulic and electrical systems should be strictly carried out in accordance with relevant specifications and standards, ensuring tight and leak free connections of pipelines, neat and secure laying of wires and cables, correct and reliable wiring. After installation, the hydraulic system should undergo a withstand voltage test and cleaning, and the electrical system should undergo insulation testing and debugging to ensure its performance meets the requirements.
（3） Precision adjustment
After the assembly of the hot press machine is completed, various precision indicators of the equipment need to be adjusted and tested, including the parallelism, perpendicularity, spacing accuracy of the hot press plate, stroke accuracy and synchronization accuracy of the hydraulic cylinder, as well as the temperature uniformity of the heating system and cooling system. By using professional testing tools and instruments such as level gauges, micrometers, thermometers, etc., various accuracy indicators are accurately measured, and corresponding adjustments and optimizations are made based on the measurement results.
In the process of precision adjustment, attention should be paid to the interrelationships and influences between various components, and a gradual adjustment and repeated testing method should be adopted to ensure that all precision indicators can meet the design requirements and production process needs. At the same time, it is necessary to keep a record of adjustments, which can serve as a reference for future equipment maintenance and upkeep.
3、 Inspection and acceptance after installation
（1） Appearance inspection
After installation, conduct a comprehensive inspection of the appearance of the hot press machine again to ensure that all components of the equipment are installed firmly, without looseness, and that the surface is free of damage, oil stains, and debris.
Check whether the identification and nameplates of the equipment are clear and complete, and whether various safety warning signs are posted in place for easy identification and compliance by operators.
（2） Performance testing
Conduct a no-load test run, start the hydraulic system, heating system, and cooling system of the hot press machine, and observe whether the operation of each component of the equipment is normal, whether there are any abnormal noises, vibrations, leaks, and other phenomena. Check whether the stroke, speed, and pressure of the hydraulic cylinder meet the design requirements, whether the heating and cooling speed of the hot press plate is uniform, and whether the temperature control is accurate.
Conduct a load test run by placing an appropriate amount of plywood blanks into the hot press machine and performing hot pressing operations according to normal production process parameters. Observe whether the bonding quality of the plywood meets the standard requirements and whether the various performance indicators of the hot press machine are stable and reliable. During the load trial operation, attention should be paid to recording the operating data of the equipment and any problems that arise, in order to make timely adjustments and improvements.
（3） Acceptance and delivery
After completing the appearance inspection and performance testing, organize relevant personnel to carry out the installation and acceptance work of the hot press machine. The acceptance content includes the installation quality, performance indicators, technical documents, etc. of the equipment, and the acceptance results should comply with relevant standards and contract requirements.
If the acceptance is qualified, the equipment acceptance and delivery procedures should be promptly handled, and the equipment should be officially delivered to the user unit. At the same time, equipment suppliers are required to provide necessary technical training and after-sales service to ensure that the operators of the using units can proficiently master the operation methods and maintenance skills of the equipment, ensuring the normal operation and production of the equipment.
The installation of plywood hot press is a complex and meticulous task that requires strict adherence to relevant specifications and standards, with a focus on quality control and precision adjustment at every stage. Only by carefully organizing and strictly controlling the installation process can we ensure the reliable installation quality of the hot press machine and provide strong guarantees for the normal production and development of plywood production enterprises.
