Machines Line To Make HVAC Filters-Cardboard Frame Pleated Air Filters
SIIC-M037-CFPAF is professional machines line to make HVAC filters-cardboard frame pleated air filters, a set of processing equipment are included to complete media rolls compositing and rewinding, pleating, gluing/assembly and drying& heat-setting.
1. About Cardboard Frame Pleated Air Filters
Cardboard frame pleated air filters are widely‑used HVAC pre‑filtration and intermediate‑filtration elements. They adopt composite synthetic fiber media reinforced with metal support mesh, which improves media rigidity and prevents deformation under airflow. The moisture‑resistant cardboard frame provides lightweight and cost‑effective structural support. Through processes including media pleating, cardboard frame fabrication, gluing & assembly, and drying & heat‑setting, the filter media is firmly bonded to the frame to avoid air leakage. Available in G4, M5, F7, F8 efficiency grades, these filters capture dust, pollen, lint and fine airborne particles. They are commonly applied in commercial ventilation systems, factories, livestock housing and general air‑conditioning units. Featuring easy installation and convenient replacement, they serve as an economical solution for general‑purpose air purification.
2. Main Components Of Machines Line
The production line is mainly composed of four components of media compositing part, pleating part, gluing part for assembly, dring and heat-set part.
Part 1-equipment for compositing and rewinding media and metal mesh
Main function: to composite filter media and metal mesh rolls and rewind them into a roll with multi-layers.
Part 2-eqipment for pleats making
Main function: pleating filter media.
Part 3-station of cardboard gluing for pleat pack assembly
Main function: Apply adhesive onto cardboard for assemble filter packs with frame.
Part 4-station of filter drying and heat-setting
Main function: Cure glue, fix pleat shape, enhance bonding performance.
3. Complete Production Process of Cardboard Frame Pleated Air Filters
The complete manufacturing procedure for cardboard frame pleated air filters covers raw material preparation, media pleating, frame processing, gluing and assembly, thermal drying and shaping, trimming and finishing, quality inspection, and final packaging. This standardized and systematic process ensures stable structural performance, reliable filtration efficiency (M5/F7/F8), airtightness and long service life of finished HVAC filters.
3-1. Raw Material Preparation
Inspect and sort all raw materials, including polyester synthetic filter media, metal support mesh, moisture-resistant cardboard frames and high-temperature hot melt adhesive. Remove defective and unqualified materials to ensure all raw materials meet production standards for filtration efficiency and structural durability.
3-2. Filter Media Pleating
Process the composite filter media with a professional servo pleating machine. The equipment automatically unwinds, tensions and folds the media with matched metal support mesh. Pleat height, pleat spacing and feeding speed are precisely adjusted according to M5, F7 and F8 efficiency requirements, forming uniform and neat pleats to maximize the filter’s effective filtration area and air permeability.
3-3. Cardboard Frame Fabrication
Cut, punch and shape moisture-resistant cardboard boards via special frame processing equipment. Process the boards into standard or customized filter frame sizes with precise dimensional tolerance. Trim burrs and smooth frame edges to ensure perfect fitting and seamless assembly with pleated filter elements.
3-4. Gluing & Assembly
Evenly apply high-strength hot melt adhesive to the bonding positions of the cardboard frame. Precisely fit and fix the pleated filter media pack into the processed frame, conduct manual and auxiliary mechanical pressing to ensure full bonding between the media and the frame. Eliminate gaps to prevent air leakage and guarantee the overall tightness of the filter.
3-5. Drying & Heat Setting
Place the initially assembled filters into a constant-temperature drying oven. Through controllable thermal curing treatment, the hot melt adhesive is fully solidified. This process strengthens the bonding firmness between the media and frame, stabilizes the pleated shape of the filter media, and avoids deformation, loose bonding and media shedding in subsequent use.
3-6. Trimming & Finishing
Trim excess media, residual glue and irregular edges of the cured finished filters. Clean the surface of the filter frame and media to remove dust and debris. Standardize the overall appearance and size of the products to meet unified finished product specifications.
3-7. Quality Inspection
Conduct full dimensional inspection, appearance inspection and air tightness test for all finished filters. Carry out random sampling test on filtration efficiency and air resistance to verify compliance with EN779 M5/F7/F8 standards. Screen out unqualified products to ensure 100% qualified rate of delivered goods.
3-8. Final Packaging
Seal and pack qualified filters with dust-proof and moisture-proof packaging materials. Paste product labels with specifications, efficiency grade and production information. Complete finished product warehousing to avoid dust pollution and moisture damage during transportation and storage.
We deliver complete one‑stop manufacturing solutions for cardboard frame pleated air filters.
Our service covers raw‑material processing, production, quality testing and finished‑product packaging. We support both standard specifications and custom sizes for M5, F7 and F8 efficiency grades. Strict in‑line quality control guarantees consistent performance for global HVAC applications. From technical consultation to after‑sales support, we simplify your whole procurement workflow.
