Production structure of environment-friendly glue-free door leaf
By combining a galvanized iron frame and an aluminum alloy door panel, and using countersunk screws for fixing, the problem of harmful gas release from traditional door panels is solved, achieving the production of door panels that combine environmental protection and health with strength.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGDONG DAJI DOOR IND CO LTD
- Filing Date
- 2025-05-26
- Publication Date
- 2026-04-21
AI Technical Summary
Traditional door panels use strong adhesives during the manufacturing process, which release harmful gases such as formaldehyde and benzene, affecting indoor environmental health and limiting their application in environmentally friendly and healthy living scenarios.
The door uses a combination structure of galvanized iron frame and aluminum alloy door panel, which is fixed with countersunk screws without the need for glue, ensuring the strength and aesthetics of the door.
It achieves glue-free fixing, avoids the release of harmful gases, ensures the environmental health and durability of the door leaf, and the aluminum alloy door panel is lightweight and not easily deformed.
Smart Images

Figure CN224149430U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of door leaf structure technology, specifically to a production structure for an environmentally friendly glue-free door leaf. Background Technology
[0002] In today's society, consumers are constantly pursuing a higher quality of life and are increasingly aware of environmental protection and health. When purchasing furniture, whether the product releases harmful gases such as formaldehyde and benzene has become a key consideration.
[0003] In the realm of entryway doors, the manufacturing process of the door leaf is closely linked to its environmental performance. Typically, door leaf thickness ranges from 50mm to 100mm. To ensure structural strength and aesthetics, a common practice is to use stainless steel or aluminum alloy plates on the front and back of the door leaf, bonding them to the internal infill frame. However, to achieve a strong and durable bond between the front and back of the door leaf and the internal frame, strong adhesives are often required during production. But most strong adhesives contain formaldehyde-based fixatives, which causes the finished door leaf to continuously release harmful gases containing formaldehyde and benzene during subsequent use, polluting the indoor environment and threatening the health of users. This problem not only limits the application of traditional door leaves in environmentally friendly and healthy living scenarios but also urgently prompts the industry to develop a new, environmentally friendly, glue-free door leaf production structure to meet market demand for green and environmentally friendly entryway doors. Utility Model Content
[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide an environmentally friendly glue-free door panel production structure that can not only ensure the quality and aesthetics of the door panel, but also meet the requirements of green environmental protection, health and safety.
[0005] To achieve the above objectives, this utility model provides the following technical solution: an environmentally friendly glue-free door panel production structure, comprising a door panel body and a door panel edging, wherein the door panel body includes a back panel, a front panel, and an internal support frame, wherein the internal support frame is disposed between the back panel and the front panel, and the door panel edging is disposed at the left and right ends of the door panel body, and the door panel edging is disposed outside the internal support frame.
[0006] Furthermore, the internal support frame includes two side support frames. Each side support frame includes a first side support plate perpendicular to the back panel and the front panel of the door leaf, a second side support plate perpendicular to the first side support plate, and a third side support plate. The second side support plate and the third side support plate are located on both sides of the first side support plate. The second side support plate is parallel to and in contact with the back panel of the door leaf, and the third side support plate is parallel to and in contact with the front panel of the door leaf. The lower end of the second side support plate is vertically connected to a fourth side support plate.
[0007] Furthermore, it also includes a central support frame, which includes a central support plate one and an inverted L-shaped plate connected to the same side of both ends of the central support plate one. The long end of the inverted L-shaped plate is connected to the central support plate one. The two side support plates one are in perpendicular contact with the central support plate one, and the two side support plates four are in perpendicular contact with the short end of the inverted L-shaped plate. The central support frame is configured in three groups, one group is located at the lower end of the door body, and the other two groups are located at the 1 / 3 and 2 / 3 positions of the door body, respectively.
[0008] Furthermore, the door leaf edge is provided with an edge protection space, and the edge protection space is provided with a countersunk screw through hole. The door leaf edge is fixed to the two side support plates by a countersunk screw passing through the countersunk screw through the screw through hole.
[0009] Furthermore, both the side support frames and the middle support frame are galvanized iron frames, which are integrally bent from 1.5mm thick galvanized iron sheets.
[0010] The two side support frames and the middle support frame are made of 1.5mm galvanized iron sheet, bent and welded into an iron structure suitable for the shape of the door leaf. This structure has the strength to support double-sided 5mm new aluminum alloy door panels and can be directly tapped for connection. The iron frame structure also ensures that the door leaf will not deform during long-term use and maintains the overall flatness of the door leaf appearance.
[0011] Furthermore, both the back panel and the front panel of the door are made of 5mm thick aluminum alloy.
[0012] Furthermore, both the back panel and the front panel of the door are new aluminum alloy door panels processed by a CNC milling machine factory, which have the advantages of precise dimensions, high processing efficiency, and varied and beautiful shapes.
[0013] Both the front and back of the door panel use a new type of aluminum alloy door panel with a thickness of 5mm. The new aluminum alloy door panel has advantages such as light weight, easy machining, and moderate cost. It is also not easy to fade or deform during long-term use.
[0014] Furthermore, an edge-sealing strip is provided on the outer side of the edge-sealing clearance.
[0015] Furthermore, screw holes are provided on both the second and third side support plates, and fixing screws are provided on the screw holes for fixing the back panel and the front panel of the door leaf to the second and third side support plates.
[0016] Furthermore, the countersunk screw has a diameter of 4mm.
[0017] Furthermore, the door panel edging is made of aluminum alloy.
[0018] The aluminum alloy edging around the door panel is fixed to the galvanized iron frame inside the door panel with 4mm countersunk screws. The aluminum alloy edging not only covers the screw holes around the aluminum alloy door panel, but also helps to fix the aluminum alloy door panel, ensuring the door panel's aesthetic appearance and strength.
[0019] Furthermore, this utility model also discloses an environmentally friendly glue-free door leaf, which includes the production structure of the aforementioned environmentally friendly glue-free door leaf.
[0020] The installation method of this utility model is as follows:
[0021] 1. Prepare materials such as a new type of aluminum alloy door panel with a thickness of 5mm, a 1.5mm galvanized iron plate, and 4mm countersunk screws, according to the design requirements.
[0022] 2. Fabrication of internal support frame: 1.5mm galvanized iron sheet is bent according to the shape of the door leaf, and then the bent galvanized iron sheet is spliced into a fixed support frame through welding process. Ensure that the strength and shape of the frame meet the design standards. After completion, the welded joints are ground to avoid sharp edges.
[0023] 3. Processing new aluminum alloy door panels: Use a CNC milling machine to process the new aluminum alloy door panels. Precisely mill the door leaf edging and screw countersunk holes around the door panel to ensure the accuracy of the processing dimensions. After processing, clean the debris from the surface of the door panel.
[0024] 4. Assemble the door panel: Fix the processed new aluminum alloy door panel to the internal galvanized iron frame using 4mm countersunk screws. Ensure the screws are tightened evenly to guarantee the door panel is level. Next, fix the aluminum alloy edging to the internal support frame of the door panel using 4mm countersunk screws, covering the screw holes around the aluminum alloy door panel. This completes the door panel assembly.
[0025] Throughout the assembly process of the door leaf, 4mm countersunk screws are used for fixing, without the need for any strong adhesive, so no harmful gases are produced, achieving the goal of environmental protection and health.
[0026] Compared with the prior art, the beneficial effects of this utility model are:
[0027] 1. Both the front and back of the door leaf use a new type of aluminum alloy door panel with a thickness of 5mm. The new aluminum alloy door panel has advantages such as light weight, easy machining, and moderate cost. It is also not easy to fade or deform during long-term use.
[0028] 2. The internal support frame is made of 1.5mm galvanized iron sheet, bent and welded into an iron structure suitable for the shape of the door leaf. This structure has the strength to support double-sided 5mm new aluminum alloy door panels and can be directly tapped for connection. The iron structure also ensures that the door leaf will not deform during long-term use and maintains the overall flatness of the door leaf appearance.
[0029] 3. The aluminum alloy edging around the door leaf is fixed to the galvanized iron frame inside the door leaf with 4mm countersunk screws. The aluminum alloy edging not only covers the screw holes around the aluminum alloy door panel, but also helps to fix the aluminum alloy door panel, ensuring the door leaf's beautiful appearance and strength.
[0030] 4. Throughout the assembly process of the door leaf, 4mm countersunk screws are used for fixing, without the need for any strong adhesive, so no harmful gases are produced, achieving the goal of environmental protection and health. Attached Figure Description
[0031] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0032] Figure 2 for Figure 1 Schematic diagram of the cross-sectional structure at point AA;
[0033] Figure 3 for Figure 2 Enlarged view at point B in the middle;
[0034] Figure 4 A schematic diagram showing the connection relationship between the internal support frame and the intermediate support frame of the door leaf;
[0035] Figure 5 for Figure 1 Schematic diagram of the cross-sectional structure at the CC section;
[0036] In the diagram: 1. Back panel of door leaf; 2. Front panel of door leaf; 3. Internal support frame; 31. Side support plate 1; 32. Side support plate 2; 33. Side support plate 3; 34. Side support plate 4; 35. Middle support plate 1; 36. Inverted L-shaped plate; 4. Door leaf edging; 5. Edging; 6. Countersunk screws; 7. Edging sealing strip; 8. Fixing screws. Detailed Implementation
[0037] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0038] For examples, please refer to Figures 1 to 5 This utility model provides a technical solution: This utility model provides the following technical solution: an environmentally friendly glue-free door panel production structure, characterized in that it includes a door panel body and a door panel edging 4. The door panel body includes a back door panel 1, a front door panel 2 and an internal support and fixing frame 3. The internal support and fixing frame 3 is disposed between the back door panel 1 and the front door panel 2. The door panel edging 4 is disposed on the left and right sides of the door panel body.
[0039] The internal support frame 3 includes two side support frames. Each side support frame includes two side support plates 31 perpendicular to the back door panel 1 and the front door panel 2, two side support plates 32 perpendicular to the two side support plates 31, and two side support plates 33. The two side support plates 32 and 33 are located on both sides of the two side support plates 31. The two side support plates 32 are parallel to and in contact with the back door panel 1, and the two side support plates 33 are parallel to and in contact with the front door panel 2. The lower end of the two side support plates 32 is vertically connected to the two side support plates 34.
[0040] It also includes an intermediate support frame, which includes an intermediate support plate 35 and an inverted L-shaped plate 36 connected to the same side of both ends of the intermediate support plate 35. One end of the long plate of the inverted L-shaped plate 36 is connected to the intermediate support plate 35. The two side support plates 31 are in perpendicular contact with the intermediate support plate 35, and the two side support plates 34 are in perpendicular contact with the short plate of the inverted L-shaped plate 36.
[0041] The intermediate support frame is set in three groups. One group is set at the bottom of the door body, and the other two groups are set at the 1 / 3 and 2 / 3 positions of the door body, respectively.
[0042] The door leaf edge band 4 is provided with an edge band clearance 5, and the edge band clearance 5 is provided with a screw countersunk hole. The door leaf edge band 4 is fixed to the two side support plates 31 by a countersunk screw 6 passing through the screw countersunk hole.
[0043] Both the side support frames and the middle support frame are galvanized iron frames, which are made of 1.5mm thick galvanized iron sheet bent in one piece.
[0044] The side and central support frames are made of 1.5mm galvanized iron sheets, bent and welded into a steel structure suitable for the shape of the door leaf. This structure has the strength to support double-sided 5mm new aluminum alloy door panels and can be directly tapped for connection. The iron frame structure also ensures that the door leaf will not deform during long-term use and maintains the overall flatness of the door leaf appearance.
[0045] Both the back panel 1 and the front panel 2 of the door are 5mm thick aluminum alloy panels. These panels are new types of aluminum alloy panels manufactured by a CNC milling machine factory, boasting advantages such as precise dimensions, high processing efficiency, and versatile and aesthetically pleasing designs.
[0046] Both the front and back of the door panel use a new type of aluminum alloy door panel with a thickness of 5mm. The new aluminum alloy door panel has advantages such as light weight, easy machining, and moderate cost. It is also not easy to fade or deform during long-term use.
[0047] An edge-sealing strip 7 is provided on the outer side of the edge-sealing clearance 5.
[0048] Both the second and third support plates on both sides are provided with screw holes, and fixing screws 8 are provided in the screw holes to fix the back door panel 1 and the front door panel 2 of the door leaf to the second and third support plates on both sides.
[0049] The countersunk screw 6 has a diameter of 4mm.
[0050] Door panel edging 4 is made of aluminum alloy.
[0051] The aluminum alloy edging around the door panel is fixed to the internal support frame with 4mm countersunk screws. The aluminum alloy edging not only covers the screw holes around the aluminum alloy door panel, but also helps to fix the aluminum alloy door panel, ensuring the door panel's aesthetic appearance and strength.
[0052] The installation method of this utility model is as follows:
[0053] 1. Prepare materials such as a new type of aluminum alloy door panel with a thickness of 5mm, a 1.5mm galvanized iron plate, and 4mm countersunk screws, according to the design requirements.
[0054] 2. Fabrication of internal support frame: 1.5mm galvanized iron sheet is bent according to the shape of the door leaf, and then the bent galvanized iron sheet is spliced into a fixed support frame through welding process. Ensure that the strength and shape of the frame meet the design standards. After completion, the welded joints are ground to avoid sharp edges.
[0055] 3. Processing new aluminum alloy door panels: Use a CNC milling machine to process the new aluminum alloy door panels. Precisely mill the door leaf edging and screw countersunk holes around the door panel to ensure the accuracy of the processing dimensions. After processing, clean the debris from the surface of the door panel.
[0056] 4. Assemble the door panel: Fix the processed new aluminum alloy door panel to the internal galvanized iron frame using 4mm countersunk screws. Ensure the screws are tightened evenly to guarantee the door panel is level. Next, fix the aluminum alloy edging to the internal support frame of the door panel using 4mm countersunk screws, covering the screw holes around the aluminum alloy door panel. This completes the door panel assembly.
[0057] Throughout the assembly process of the door leaf, 4mm countersunk screws are used for fixing, without the need for any strong adhesive, so no harmful gases are produced, achieving the goal of environmental protection and health.
[0058] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. An environment-friendly production structure of a door leaf without glue, characterized in that, The door includes a main body and a door edging (4). The main body includes a back panel (1), a front panel (2), and an internal support frame (3). The internal support frame (3) is located between the back panel (1) and the front panel (2). The door edging (4) is located on the left and right sides of the main body.
2. The production structure of an environmentally friendly no-glue door leaf according to claim 1, characterized in that: The internal support frame (3) includes two side support frames. Each side support frame includes a first side support plate (31) perpendicular to the back panel (1) and the front panel (2) of the door leaf, a second side support plate (32) perpendicular to the first side support plate (31), and a third side support plate (33). The second side support plate (32) and the third side support plate (33) are located on both sides of the first side support plate (31). The second side support plate (32) is parallel to and in contact with the back panel (1) of the door leaf, and the third side support plate (33) is parallel to and in contact with the front panel (2) of the door leaf. The lower end of the second side support plate (32) is vertically connected to the fourth side support plate (34).
3. The production structure of an environmentally friendly no-glue door leaf according to claim 2, characterized in that: It also includes an inner intermediate support frame, which includes an intermediate support plate (35) and an inverted L-shaped plate (36) connected to the same side of both ends of the intermediate support plate (35). The long end of the inverted L-shaped plate (36) is connected to the intermediate support plate (35). The two side support plates (31) are in perpendicular contact with the intermediate support plate (35), and the two side support plates (34) are in perpendicular contact with the short end of the inverted L-shaped plate (36). The intermediate support frame is set in three groups, one group is set at the lower end of the door body, and the other two groups are set at the 1 / 3 and 2 / 3 positions of the door body, respectively.
4. The production structure of an environmentally friendly no-glue door leaf according to claim 2, characterized in that: The door leaf edge (4) is provided with an edge protection space (5), and the edge protection space (5) is provided with a screw countersunk hole. The door leaf edge (4) is fixed to the two side support plates (31) by passing a countersunk screw (6) through the screw countersunk hole.
5. The production structure of an environmentally friendly no-glue door leaf according to claim 2, characterized in that: The two side support frames and the middle support frame are both galvanized iron frames, which are integrally bent from 1.5mm thick galvanized iron sheets.
6. The production structure of an environmentally friendly glue-free door leaf according to claim 1, characterized in that: Both the back panel (1) and the front panel (2) of the door are 5mm thick aluminum alloy panels.
7. The production structure of an environmentally friendly no-glue door leaf according to claim 4, characterized in that: An edge sealing strip (7) is provided on the outside of the edge protection position (5).
8. The production structure of an environmentally friendly no-glue door leaf according to claim 2, characterized in that: Both the second (32) and the third (33) of the two sides are provided with screw holes, and fixing screws (8) are provided in the screw holes for fixing the back door panel (1) and the front door panel (2) of the door leaf to the second (32) and the third (33) of the two sides.
9. The production structure of an environmentally friendly no-glue door leaf according to claim 4, characterized in that: The countersunk screw (6) has a diameter of 4mm.
10. An environmentally friendly, glueless door leaf, characterized in that, The production structure of an environmentally friendly glue-free door leaf includes any one of the claims 1-9 above.