Steel-wood composite door
By using a combination of bent galvanized steel sheets and molded medium-density fiberboard, the problems of cumbersome manufacturing and insufficient strength of existing steel-wood composite doors have been solved, achieving efficient production and high-strength steel-wood composite doors.
Patent Information
- Application Number
- CN202520378499.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-05
- Publication Date
- 2026-01-27
- Estimated Expiration
- 2035-03-05
AI Technical Summary
The existing steel-wood composite door manufacturing process is complicated, costly, has a low rate of wood scrap recycling, and lacks overall strength.
The door core is made of bent galvanized steel sheet, filled with perlite board and then directly welded, eliminating the wooden frame. Molded medium fiberboard and stainless steel profiles are glued to the outside of the steel sheet for edge sealing and fixed with self-tapping screws.
It simplifies the manufacturing process, improves the utilization rate of steel plates, enhances the overall strength and aesthetics of the door, reduces costs, and increases the recycling rate of wood.
Smart Images
Figure CN223838967U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of steel-wood armored door technology, and in particular to a steel-wood composite door with steel edging and no wooden frame support. Background Technology
[0002] In residential construction, the entrance door, as the first door entering a home, forms the first impression. Therefore, the choice of entrance door style is particularly important. Most homeowners prefer entrance doors with styles that conform to current market trends. With the improvement of living standards, steel-wood composite doors, which offer good aesthetics, security, and durability, are more readily accepted by the public. As an entrance door manufacturer, we also need to continuously optimize and upgrade our processes. Currently, common steel-wood doors on the market generally consist of wooden strips on the top, bottom, left, and right sides forming a wooden frame filled with perlite board. A flat steel plate is then glued to the perlite board and wooden frame as the steel core. MDF is then glued to the steel plate to form the door leaf. This process also requires separately purchasing wood veneer to seal the edges of the door leaf. This process is not only cumbersome, but using flame-retardant engineered wood strips is costly, and the recycling rate of wood scraps is low. Furthermore, the overall strength of such steel-wood doors is relatively low.
[0003] Therefore, there is an urgent need to design a steel-edged steel-wood composite door that is simple to manufacture and has a high recycling rate. Utility Model Content
[0004] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide a steel-wood composite door.
[0005] This steel-wood composite door includes a door frame, exposed hinges, and a door leaf. The door leaf is connected to the door frame via the exposed hinges. The door leaf includes a door leaf steel core fixedly connected by a back galvanized steel plate and a front galvanized steel plate. The door leaf steel core has a cavity in the middle for installing a perlite fireproof board. The outer sides of both the back galvanized steel plate and the front galvanized steel plate are provided with molded medium fiberboard and are fixedly sealed with stainless steel profiles.
[0006] Preferably, the molded medium fiberboard includes a front molded medium fiberboard and a back molded medium fiberboard; the front molded medium fiberboard is glued to the outside of the front galvanized steel sheet; the back molded medium fiberboard is glued to the outside of the back galvanized steel sheet.
[0007] Preferably, both sides of the front molded MDF and the back molded MDF are provided with mounting grooves; both ends of the stainless steel profile are embedded in the mounting grooves and are threadedly connected to the exposed hinge.
[0008] Preferably, the door frame includes a steel outer frame, support plates, a door frame sealing strip, and a wooden door trim; a plurality of support plates are welded to the back of the steel outer frame; the side of the steel outer frame near the door leaf is glued to the door frame sealing strip; and the front of the steel outer frame is glued to the wooden door trim.
[0009] The beneficial effects of this utility model are:
[0010] 1) In this utility model, galvanized steel plates are bent and formed, and perlite plates are filled into the steel core of the door leaf and then directly welded together. This not only eliminates the need for a wooden frame, but also reduces the amount of steel plate cutting material, increases the utilization rate of steel plates, makes it more convenient for workers to operate, and has high strength.
[0011] 2) This utility model incorporates front and rear wooden panel mounting grooves, allowing the steel edge banding to lie on the same plane as the side surface of the door leaf. This not only makes the steel-wood door neater and more aesthetically pleasing but also applies force to secure the front and rear wooden veneers to the steel core of the door leaf. The steel edge banding is then firmly fixed to the perimeter of the door leaf steel core using self-tapping screws. Steel edge banding is more durable than wood veneer edge banding, less prone to warping or peeling, and easier to install than wood veneer, making it suitable for standardized door production. Attached Figure Description
[0012] Figure 1 This is an overall elevation view of a steel-wood composite door;
[0013] Figure 2 This is a cross-sectional view of a steel-wood composite door;
[0014] Figure 3 This is an exploded cross-sectional view of a steel-wood composite door.
[0015] Explanation of reference numerals in the attached drawings: 1. Exposed hinge; 2. Door frame; 3. Door leaf; 4. Molded MDF on the back; 5. Galvanized steel sheet on the front; 6. Perlite fireproof board; 7. Galvanized steel sheet on the front; 8. Stainless steel profile; 9. Self-tapping screw; 10. Steel outer frame; 11. Door frame sealing strip; 12. Support plate; 13. Wooden door trim; 14. Detailed Implementation
[0016] The present invention will be further described below with reference to embodiments. The description of the embodiments below is only for the purpose of helping to understand the present invention. It should be noted that, for those skilled in the art, several modifications can be made to the present invention without departing from the principle of the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.
[0017] As one example, such as Figure 1 As shown, this steel-wood composite door includes a door frame 2, exposed hinges 1, and a door leaf 3; the door leaf 3 is hinged to the door leaf 3 via exposed hinges 1. Figure 2 As shown, the door leaf 3 includes a door leaf steel core fixedly connected by a back galvanized steel plate 5 and a front galvanized steel plate 7. The thickness of the galvanized steel plate is 0.8mm. A cavity is provided in the middle of the door leaf steel core for installing a perlite fireproof board 6. The back galvanized steel plate 5 and the front galvanized steel plate 7 are bent and formed, and then filled with perlite fireproof board 6 and directly welded together to serve as the internal keel of the steel-wood door. This process not only eliminates the need for a wooden frame, but also reduces the amount of steel plate cutting material, increases the utilization rate of steel plates, and makes it more convenient for workers to operate. From the appearance, there is no obvious difference from a steel-wood door leaf made with a wooden frame, but the strength is higher than that of a steel-wood door made with a wooden frame.
[0018] Combination Figure 2 and Figure 3 As shown, both the back galvanized steel plate 5 and the front galvanized steel plate 7 have 12mm thick molded medium-density fiberboard (MDF) on their outer sides. The molded MDF includes a front molded MDF 8 and a back molded MDF 4. The front molded MDF 8 is glued to the outer side of the front galvanized steel plate 7; the back molded MDF 4 is glued to the outer side of the back galvanized steel plate 5. Both sides of the front molded MDF 8 and the back molded MDF 4 have mounting grooves. The two ends of the stainless steel profile 9 are embedded in the mounting grooves to complete the edge sealing and are threadedly connected to the exposed hinge 1. The stainless steel profile is 0.8mm thick and uses stainless steel bent profile clips embedded in the mounting grooves, allowing the stainless steel profile 9 to be on the same plane as the side surface of the door leaf. This not only makes the steel-wood door neater and more aesthetically pleasing but also applies force to fix the front and rear wood veneers to the door leaf steel core. Finally, self-tapping screws 10 are used to fix it around the door leaf steel core, making the steel edge sealing more secure. Steel edge banding is more durable than wood veneer edge banding, less prone to warping and peeling, and easier to install than wood veneer, making it suitable for standardized door production.
[0019] like Figure 3 As shown, the door frame 2 includes a steel outer frame 11, a support plate 13, a door frame sealing strip 12, and a wooden door trim 14; the support plate 13 is welded to the back of the steel outer frame 11 to prevent the steel outer frame 11 from deforming under stress; the side of the steel outer frame 11 near the door leaf 3 is glued to the door frame sealing strip 12 to buffer the closing of the door leaf 3; the front of the steel outer frame 11 is glued to the wooden door trim 14 to form the door frame 2.
Claims
1. A steel-wood composite door, comprising a door frame (2), exposed hinges (1), and a door leaf (3); wherein the door leaf (3) is connected to the door leaf (3) via the exposed hinges (1), characterized in that, The door leaf (3) includes a door leaf steel core fixedly connected by a back galvanized steel plate (5) and a front galvanized steel plate (7); the door leaf steel core has a cavity in the middle for installing a perlite fireproof board (6); the back galvanized steel plate (5) and the front galvanized steel plate (7) are both provided with molded medium fiberboard on the outside, and are fixedly sealed with stainless steel profiles (9).
2. The steel-wood composite door according to claim 1, characterized in that, The molded medium fiberboard includes a front molded medium fiberboard (8) and a back molded medium fiberboard (4); the front molded medium fiberboard (8) is glued to the outside of the front galvanized steel plate (7); the back molded medium fiberboard (4) is glued to the outside of the back galvanized steel plate (5).
3. The steel-wood composite door according to claim 2, characterized in that, Both sides of the front molded MDF (8) and the back molded MDF (4) are provided with mounting grooves; both ends of the stainless steel profile (9) are embedded in the mounting grooves and are threadedly connected to the exposed hinge (1).
4. The steel-wood composite door according to claim 1, characterized in that, The door frame (2) includes a steel outer frame (11), support pieces (13), a door frame sealing strip (12), and a wooden door trim (14); a plurality of support pieces (13) are welded to the back of the steel outer frame (11); the side of the steel outer frame (11) near the door leaf (3) is glued to the door frame sealing strip (12); the front of the steel outer frame (11) is glued to the wooden door trim (14).