GFRP Hot Press Machine for Glass Fibre
Process, principle and application of glass fiber hot press machine
Glass fiber hot press machine is a key equipment used for forming glass fiber reinforced composite materials (GFRP), which solidifies the resin through heating and pressure, ultimately forming high-strength and lightweight composite material products.
Working principle of glass fiber hot press machine
The core of the glass fiber hot pressing process is hot pressing curing, which mainly involves the following steps:
1. Material preparation
-Reinforcement material: fiberglass cloth/felt.
-Resin matrix: Unsaturated polyester resin (UPR), epoxy resin (EP), phenolic resin (PF), etc.
-Auxiliary materials: release agent, curing agent, filler (such as calcium carbonate), etc.
2. Layer laying
-Stack the glass fiber cloth and resin according to the design requirements (hand lay or automatic layering).
-Some processes use prepreg to improve efficiency.
3. Hot pressing curing
-Heating: The hot press provides high temperature (usually 80-200 ° C) to promote resin cross-linking and curing.
-Pressure (0.5-10 MPa): Eliminate bubbles and improve the fiber resin bonding strength.
-Pressure holding time: Adjust according to the type of resin (usually several minutes to several hours).
4. Demoulding and post-processing
-After cooling, remove the product and perform edge trimming, polishing, painting, and other treatments.
Classification of Glass Fiber Hot Pressing Process
According to the molding method, it can be mainly divided into the following types:
Compression molding: The upper and lower molds are heated and pressurized, suitable for large-scale production with high precision. Automotive components, electrical enclosures, building panels.
Laminated molding: multi-layer glass fiber+resin compression, used for flat or simple curved surfaces. PCB substrate, insulation board, decorative board.
Vacuum hot pressing: Combining vacuum environment to reduce bubbles and improve strength. Aerospace components, high-end sports equipment.
Hot press molding: High temperature and high pressure (up to 200 ° C, 10 bar), used for high-performance composite materials. Aircraft wings, satellite structures, military products.
Core application of glass fiber hot press machine
(1) Automotive industry
-Lightweight components: door panels, hood, bumper (replacing metal).
-Battery enclosure: GFRP battery protective case for electric vehicles (EVs).
(2) Architecture and Building Materials
-Anti corrosion board: Chemical workshop wall panels, roof tiles (acid and alkali resistant).
-Insulation materials: fireproof soundproof board, cable tray.
(3) Ship and Ocean Engineering
-Hull&Deck: FRP fishing boats and yachts.
-Offshore wind power: blade support structure.
(4) Electronic appliances
-PCB substrate: glass fiber epoxy resin laminated board (such as FR-4).
-Insulation components: switchgear, transformer isolators.
(5) Aerospace&Military Industry
-Drone body: Carbon fiber/glass fiber hybrid hot press molding.
-Missile shell: High temperature resistant phenolic resin based composite material.
Advantages of glass fiber hot press machine
High strength&lightweight (30%~50% lighter than steel, with similar strength).
Corrosion resistance (suitable for chemical and marine environments).
High production efficiency (the molding process can be automated and suitable for mass production).
Flexible design (capable of forming complex surfaces to meet the needs of different industries).
Development Trends
-Environmentally friendly resins: bio based epoxy resins and water-based resins replace traditional materials.
-Intelligent hot press machine: integrated PLC control, real-time temperature/pressure monitoring.
-Hybrid composite materials: composite application of glass fiber+carbon fiber/natural fiber (such as bamboo fiber).
Technical Data:
