Compound door The door cores of solid wood composite doors are mostly made of pine, fir or imported filling materials. MDF and solid wood veneer are pasted on the outside, made after high-temperature hot pressing, and are sealed with solid wood lines. Generally, high-grade solid wood composite doors have high-quality white pine cores and solid wood veneers on the surface. Because the white pine has low density, light weight, and easier to control the moisture content, the finished door has a lighter weight and is not easy to deform or crack. In addition, the solid wood composite door also has the characteristics of heat preservation, impact resistance, flame retardancy, etc., and the sound insulation effect is basically the same as that of the solid wood door. In addition, veneer and stickers are more common for modern wooden doors. The veneer wooden door is relatively expensive because of its natural texture, beautiful appearance and strong impact resistance; the sticker wooden door is also called "grained wooden door", because of its low price, it is a relatively popular product. The disadvantage is that it is easier to break and is afraid of water. . The solid wood composite door has the characteristics of smooth hand feeling and soft color. It is very environmentally friendly, strong and durable. Solid Wood Door The solid wood door is made of natural logs taken from the forest as the door core, after drying, and then scientifically processed by cutting, planing, tenoning, drilling, high-speed milling and other processes . Full wooden door The whole wooden door uses natural log wood as the door core, and the balance layer uses plywood instead of MDF; the process has the natural characteristics and environmental protection of the log, the process solves the instability of the log, and the shape is more diverse and delicate

Functional factors In addition to considering the security factors of anti-theft, the entrance door can choose beautiful, strong, and heavy wooden doors; bedroom doors mainly consider privacy and create a warm atmosphere, so they usually adopt weak light transmission and solid door types; book The door of the room should be a door type with good sound insulation, good light transmission and strong design. For example, a wooden door with an antique window rib pattern can produce a simple and elegant scholarly charm; a kitchen door should choose a waterproof and good airtightness The door type is designed to effectively block the oily smoke generated during cooking; the bathroom door mainly focuses on factors such as privacy and waterproofness. Quality factor Consumers cannot go to the manufacturer to stare at the production process of the wooden door, but they can uate the quality of the product through simple visual inspection methods. Stroke the frame, panel, and corner of the door with your hands, requiring no scratching, softness and fineness; then stand on the side of the door and look at the light to see if there are bumps and waves on the paint surface of the door panel. With these two methods, consumers can basically buy good-looking wooden doors. When choosing a solid wood door, you can check the thickness of the door, and you can tap on the door with your hands. If the sound is even and dull, it means that the door is of good quality. Weight: Generally, the higher the solid wood ratio of a wooden door, the heavier the door will be. If it is a pure solid wood door, the pattern on the surface is very irregular. Due to cost processing methods and equipment issues, 90% of the suit wooden doors on the market use polyester paint, and a few manufacturers use PU paint. Generally speaking, polyester paint and PU paint have to go through six processes including color finding, three bottoms and two sides. Some brands add curing and waxing processes. Therefore, when choosing wooden doors, paint is one of the factors that must be considered. It directly affects the texture, feel, moisture resistance, environmental protection, durability, yellowing resistance and other issues. Price factor The price of solid wood doors varies according to their wood materials and textures. The market price ranges from 1,500 yuan to 3,000 yuan. The low-end ones include pine, fir, etc. (generally solid wood composite doors use them as internal filling materials). A top-quality teak door (without cover) of wood, cherry wood, sapele, red pear, rosewood, etc. sells for 3000-4000 yuan. Generally, high-grade solid wood doors do better in the process of dehydration, and the relative moisture content is about 8%. This way, the formed wooden door is not easy to deform or crack, and it will take a long time to use. Generally, the price of log doors of high-grade wood is as high as 4, 5 thousand or even 6000. The price of original wooden doors is very high. According to the difference of wood materials, paint work, etc., it is estimated that only mid-range wooden doors can be bought. The high-grade solid wood composite door not only has the characteristics of smooth hand feeling and soft color, but also very environmentally friendly, durable and durable. The solid wood composite door has the characteristics of smooth hand feeling and soft color. It is durable and not easy to crack. It belongs to the middle and high-end products. Environmental factors The appearance is beautiful, and the internal environmental protection is also very important. When purchasing, consumers can first open the closed package and probe in to smell the pungent smell. If people shed tears and sneezes, it means that the amount of formaldehyde released is relatively high. The editor of Shangmen.com reminds consumers that most of the wooden doors with excessive release of harmful substances are made of cheap man-made panels, so the price of the entire wooden door is often extremely low. As cheap man-made boards use a large amount of inferior glue, the release of various harmful substances is seriously exceeded, so beware of low-price traps. Brand factor Consumers should try their best to choose manufacturers with good brand reputations, and measure the quality of their products by checking the relevant qualification certification of the manufacturer, comparing whether the relevant industry standards are complete, and whether the release of various harmful substances is within the range allowed by the standards. Before the wooden door is sent to the home for installation, pay attention to the final check by checking the internal materials of the door lock hole.  

The selection of wood species and material grade should meet the design requirements. When it comes to unspecified material grades, the quality of wood used for all-wood mortise doors should meet the requirements in Appendix A of GB50210-2001. ● Wood moisture content The moisture content of the selected wood should not be greater than 12%. In high-humidity areas and high-humidity months, the allowable value of water content can be slightly larger, but it should not be greater than the local equilibrium water rate of the month. ● Glulam ● Medium Density Fiberboard The selection of medium density fiberboard should meet the requirements of the first grade product specified in GB/T11718-1999, the density is not less than 0.68g/cm, the distribution is uniform, and the texture is stable. ● Particleboard When selecting particleboard, it should meet the requirements specified in GB/T 4897-2003. ● Plywood The choice of plywood should meet the first-class product requirements specified in GB/T 9846.1～9846.8-2004. ●Formaldehyde emission The formaldehyde emission of various glue materials selected should meet the requirements specified in GB18580-2001. ● Adhesive The limit of harmful substances in the adhesive should meet the requirements specified in GB18583-2001. ● Paint The limit of harmful substances in paint should meet the requirements specified in GB18581-2001. ● Glass The glass should be selected according to the functional requirements of the appropriate variety and color, and safety glass should be used

1. Wood drying The raw material board (with moisture content of about 60-70%) entering the factory is put into a drying kiln for spray steaming and drying. The texture and thickness of the board are different, and the season is different, and the temperature, time and stabilization time of spray drying are also different. Generally, the steaming time is about 15min, the heating and drying time is about 25-30d, and the moisture content of the dried board is about 10-14%. Steam injection and heating and drying are provided by the newly installed 4t/h coal-fired steam boiler. During the heating and drying process, according to the technological control requirements, it is necessary to open the moisture exhaust window of the drying kiln from time to time to discharge the steam in the drying kiln. 2. Cutting material: (1) When rough cutting, increase the length and width by 10mm each; (repair required) (2) If the material is combined, indicate the veneer material and indicate which door type combination; 3. Group frame (1) The four corners are square, the length and width are increased by 10MM (2) The outer frame width specification is 800-2000MM, the surface board is 6MM medium density board, and the middle is filled with Sauerland hollow creative board. (3) Locking wood or lock box can also be used. (4) If the frame is a glass door, determine the size and position of the glass (5) After the frame is treated to prevent deformation, the upper press is flattened 4. Hot pressing process standard (1) Before putting the workpiece that needs hot pressing, the hot pressing plate and the workpiece must be cleaned, confirm that there are no impurities, set the hot pressing temperature and pressure, and slowly put the workpiece in. (2) The inserted workpieces should be arranged in an orderly manner, so that the force on each part is even. (3) Fill all positions as much as possible for each hot pressing, and ensure that the thickness of each layer of plate is the same as the cladding material of each layer. The cladding material cannot overlap. If it cannot be filled, spare pads of the same thickness as the workpiece should be used. (4) In order to prevent the glue from drying out, each loading should be completed within two minutes. When it is confirmed that it is correct and safe, start the machine again. (5) The surface of the workpiece after pressurization should be flat, smooth, and free of unevenness and graininess. (6) The parquet should be aligned. (7) After cladding, the wooden door shall not be degummed, penetrated, laminated and separated from the core, scratched, indented, bumped, misaligned, oil stained, and the color is basically the same. 5. Cold pressing process standard (1) The cold pressing time should be determined according to the temperature to ensure that the glue layer is solidified and the glue is firm. (2) After pressurization, the surface of the type parts should be smooth, smooth, and without unevenness or graininess when touching. 6. Straight edge tailoring (1) The cutting error does not exceed 0.2MM cutting standard (2) Before inserting the workpiece, the pressure plate and the workpiece should be cleaned. (3) The inserted work piece must not be misaligned, and the top and bottom are aligned with the core board, and there must be no chipping. (4) Both sides of the door leaf should be inclined by 2 degrees, and the rest should be sawed into straight edges without scratches. 7. Process standard of milling door core board (1) When milling the door core board, the feed force is even and there is no chipping. (2) The appearance is smooth and round. (3) Milling according to proportion, accurate size, no chipping; 8. Manual pasting (1) When applying white latex to the skin, it must be dried for the first time and then brushed for the second time, and then ironed with an iron. (2) Shovel the flat strip with a wooden board. ； (3) After pasting, there must be no seam separation, degumming, bubbling, veneer cracking, etc. 9. Punch keyholes and hinge holes (1) Pay attention to the opening direction of the door; (2) Pay attention to the upper and lower ends of the door and do not turn around. (3) There shall be no chipping, scratching, and special molds, and the holes can be drilled only after the clamps are clamped. 10. Trial assembly (1) The corners of the door trim lines are tightly connected and must not leave the seams; (2) The door leaf and the door cover are closely attached, flat, and must not be separated from the seam; (3) The door leaf shall not be shaken in a gap; 11. Paint (1) Before polishing, check the blanks, and do not process degumming, bubbling, scratches, and missing products; (2) The white billet needs to be polished smooth, nail holes, and gaps need to be filled; (3) The primer should be sprayed evenly, and checked for degumming and bubbling, and polished after drying; (4) No particles, sagging, peeling, luster should meet customer requirements when spraying the finish; 12. Packing and storage (1) Carefully check that the door leaf and door cover are not complete and the quality is up to standard. Unqualified products shall not be packaged and shipped. Wrong or missing colors are strictly prohibited, and the products must be handled with care; (2) Before packaging, remove the glue marks and impurities on the working surface, wrap it with packaging film, and protect the four door corners with corrugated paper; (3) Affix the label and fill in the warehousing form after warehousing. 13. Installation (1) After confirming that the opening and the door are correct, carry out assembly, vertical sleeve calibration, glue fixation, and installation of the door leaf; (2) The door cover and the wall are closed with glass glue, and more glue should be used under the door cover to prevent excessive water from entering the door cover