Great wall plate and its mold

Abstract

The present invention relates to a Great Wall board and its mold, belonging to the technical field of wood-plastic board. A Great Wall board comprises a substrate and a co-extruded coating layer disposed on the surface of the substrate; the co-extruded coating layer has a convex surface and a concave surface disposed at intervals, and the substrate has a substrate convex portion corresponding to the convex surface and a substrate concave portion corresponding to the concave surface; a clamping structure is disposed between the substrate concave portion and the concave surface, and the clamping structure includes a groove provided on the upper surface of the substrate concave portion and a clamping head provided on the lower surface of the concave surface. By providing a clamping structure between the substrate concave portion and the concave surface, the present invention achieves the purpose of firmly bonding the core layer to the surface.

Description

Technical Field

[0001] The invention relates to a Great Wall board and a mould thereof, belonging to the technical field of wood-plastic boards. Background Art

[0002] Great Wall panels refer to panels with an appearance similar to the Great Wall, with a regular surface of alternately arranged protrusions and depressions. They are mainly used for interior decoration, usually showing the effect of light and dark longitudinal stripes, and are widely welcomed by current consumers. Existing Great Wall panels are made of a variety of materials, including wood, aluminum alloy, and wood-plastic, among which wood-plastic has the highest share. For example, the utility model patent with application number CN216552799U discloses a Great Wall panel, which includes a Great Wall panel main body and an auxiliary installation plate; the upper end face of the Great Wall panel main body is provided with a rectangular through hole, one side is integrally formed with a limiting straight plate, the other side is integrally formed with a limiting through hole, and the lower end face is provided with a fixing screw; the auxiliary installation plate is screwed to the Great Wall panel main body by fixing screws, and the limiting straight plate is fixed with a buckle lock assembly by a sleeve. It improves the Great Wall panel main body and adopts double screws to fix it with the auxiliary installation plate, which has a good fixing effect.

[0003] Great Wall panels are used in interior decoration, and people have high environmental requirements. Especially for wood-plastic composite materials, polyolefins are ideal as the base resin, considering both material cost and environmental considerations. Polyolefins are prone to aging and oxidation, and their tactile and visual qualities are poor, so they are often coated with other materials. However, polyolefin resins have very low polarity, and coating with other materials can easily cause cracking and other problems. Summary of the Invention

[0004] The present invention aims to solve the above problems and thus provides a Great Wall board. The Great Wall board of the present invention has the characteristics of a strong connection between the core and the surface.

[0005] The technical solutions of the present invention for solving the above problems are as follows:

[0006] A Great Wall panel comprises a substrate and a co-extruded coating layer arranged on the surface of the substrate; the co-extruded coating layer has a convex surface and a concave surface arranged at intervals, and the substrate has a substrate convex portion corresponding to the convex surface and a substrate concave portion corresponding to the concave surface; a clamping structure is provided between the substrate concave portion and the concave surface, and the clamping structure comprises a groove provided on the upper surface of the substrate concave portion and a clamping head provided on the lower surface of the concave surface.

[0007] In the above technical solution of the present invention, by providing a snap-fit ​​structure between the recessed portion of the substrate and the recessed surface, not only is a strong bond between the core and the surface layer achieved, but the snap-fit ​​structure also facilitates mold design and manufacture, as well as sheet extrusion molding, by being positioned between the substrate recessed portion and the recessed surface, which are susceptible to cracking.

[0008] As a preferred embodiment of the above technical solution, the groove has a necking structure, and the clamping head and the groove have corresponding structures.

[0009] As a preferred embodiment of the above technical solution, a vacant area is provided in the raised portion of the substrate.

[0010] In the above technical solution of the present invention, the design of the vacant area can not only effectively reduce the unit volume weight of the substrate, but also improve the compressive strength of the board.

[0011] As a preferred embodiment of the above technical solution, it also includes a mortise and tenon structure, which includes a tenon set at one of the left and right ends of the Great Wall board and a tenon groove set at the other end of the left and right ends of the Great Wall board; the tenon and the tenon groove have corresponding structures.

[0012] In the above technical solution of the present invention, the co-extruded coating layer covers the entire raised portion of the substrate, and the upper wall of the mortise and tenon is also covered by the co-extruded coating layer. Therefore, after the tenon is inserted into the mortise and tenon, the corresponding part of the co-extruded coating layer is also clamped in the mortise and tenon. Therefore, even if there is no above-mentioned clamping structure at the connection of the plate, the co-extruded coating layer will not crack.

[0013] As a preferred embodiment of the above technical solution, the depth of the mortise is greater than the length of the tenon.

[0014] In the above technical solution of the present invention, when the depth of the mortise is greater than the length of the tenon, the mortise and tenon joint structure can produce a tighter connection.

[0015] Another object of the present invention is to provide a mold for preparing the above-mentioned Great Wall board.

[0016] The mold used to prepare the above-mentioned Great Wall board is formed by connecting multiple mold plates including a mold discharge plate, a flow channel forming plate and a mold feed plate. The mold includes a main flow channel and a co-extrusion flow channel located above the main flow channel. described A flow-blocking core rod is provided in the main channel ;

[0017] The flow channel forming plate includes a first forming plate, a second forming plate and a third forming plate; The co-extrusion flow channel The first forming plate and the second forming plate begin to merge with the main channel ;

[0018] The feed port of the co-extrusion channel is arranged on the third forming plate;

[0019] The co-extrusion flow channel includes a feed section, a casting section and a discharge section;

[0020] The feeding section is arranged on the third forming plate;

[0021] The casting section is arranged on the second forming plate;

[0022] The discharging section is arranged on the first forming plate.

[0023] As a preferred embodiment of the above technical solution, the feeding section is arranged vertically;

[0024] The casting section includes a vertical section connected to the feeding section and an oblique section connected to the discharging section; the oblique section gradually shrinks along the floor extrusion direction; the discharging section is arranged horizontally and merges with the main channel.

[0025] As a preferred embodiment of the above technical solution, the surface where the third forming plate and the second forming plate are connected is a plane provided with a raised area; the outer surface of the raised area is the bottom surface formed by the co-extrusion channel on the second forming plate; and the feeding section forms a horizontal first outlet on this surface.

[0026] As a preferred embodiment of the above technical solution, The outer surface of the raised area is provided with a gradually increasing The guide groove is deepened, and the bottom of the guide groove extends into the main channel .

[0027] As a preferred embodiment of the above technical solution, the surface where the second forming plate and the third forming plate meet is a plane with a recessed area; the top surface of the recessed area is the top surface formed by the co-extrusion channel on the second forming plate.

[0028] As a preferred embodiment of the above technical solution, the vertical section is connected to the feed section to form a horizontal and vertical bend, and the horizontal and vertical bend is arranged on the surface where the second forming plate and the third forming plate are connected; the vertical section is a cavity excavated on the surface.

[0029] In summary, the present invention has the following beneficial effects:

[0030] 1. The present invention achieves the purpose of firmly bonding the core layer to the surface by providing a snap-fit ​​structure between the recessed portion of the substrate and the recessed surface.

[0031] 2. The clamping structure of the present invention is arranged between the recessed portion of the substrate that is prone to cracking and the recessed surface. The arrangement of the clamping structure here also facilitates the design and manufacture of the mold and the extrusion molding of the plate;

[0032] 3. The co-extruded coating of the present invention covers the entire raised portion of the substrate, and the upper wall of the mortise is also covered by the co-extruded coating. Therefore, after the tenon is inserted into the mortise, the corresponding portion of the co-extruded coating is also clamped into the mortise. Therefore, even if the above-mentioned clamping structure is not present at the joint of the plate, the co-extruded coating will not crack.

[0033] 4. The mold for preparing the above-mentioned Great Wall panels of the present invention is unique in structure. The vertical section is formed by excavating on the surface where the second forming plate and the third forming plate are connected. At the same time, the plane with a recessed area where the second forming plate and the third forming plate are connected is used as the top surface of the vertical section of the co-extruded flow channel formed on the second forming plate, and the plane with a raised area where the third forming plate and the second forming plate are connected is used as the bottom surface of the vertical section of the co-extruded flow channel formed on the third forming plate. This not only facilitates the formation of the flow channel, but also significantly improves the flow rate of the material in the flow channel. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 This is a structural diagram of a Great Wall board of the present invention;

[0035] Figure 2 yes Figure 1 A partial enlarged view of

[0036] Figure 3 This is a schematic diagram of the mold structure used to prepare the Great Wall board;

[0037] Figure 4 yes Figure 3 AA sectional view;

[0038] Figure 5 yes Figure 3 BB cross-sectional view;

[0039] Figure 6 yes Figure 3 CC sectional view;

[0040] In the figure, 1 - substrate, 2 - Co-extruded covering layer;

[0041] 11 - a raised portion of the substrate, 12 - a recessed portion of the substrate, 13 - tenon, 14 - mortise and tenon;

[0042] 21 - raised surfaces, 22 - concave surface;

[0043] 111 -Vacant area ，121 - grooves, 221 -Card head;

[0044] 100 -die feed plate, 200 - flow channel forming plate, 300 -Mold discharge plate;

[0045] 31 - Main channel, 32 - Co-extrusion runner, 33 - choke core rod;

[0046] 201 - a first forming plate, 202 - Second Formation Edition, 203 - a third forming plate;

[0047] 320 -feed port, 321 -Feeding section, 322 - Casting section, 323 -Discharging section;

[0048] 321-1 -First exit, 322-1 - vertical segment, 322-2 - oblique section; 322-1-1 -Diversion trough. DETAILED DESCRIPTION

[0049] The present invention is further explained below with reference to the accompanying drawings.

[0050] This specific implementation is merely an explanation of the present invention and is not intended to limit the present invention. Any changes made by those skilled in the art after reading the specification of the present invention will be protected by patent law as long as they are within the scope of the claims.

[0051] like Figures 1 and 2 As shown, a Great Wall board includes a substrate 1 and a co-extruded coating layer arranged on the surface of the substrate 2 ; The co-extruded coating layer 2 Raised surfaces with spaced-apart arrangements 21 and concave surfaces 22 , the substrate has a convex surface 21 Corresponding substrate protrusion 11 and the concave surface 22 Corresponding substrate recess 12 The substrate recessed portion 12 With the concave surface 22 A clamping structure is provided between the substrate and the substrate. 12 Grooves on the upper surface 121 and opening in the recessed surface 22Chuck on the lower surface 221 The groove 121 has a constricted structure, and the clamp 221 With the groove 121 The substrate protrusion has a corresponding structure. 11 There is a vacant area inside 111 It also includes a mortise and tenon structure, which includes a tenon set at one of the left and right ends of the Great Wall board. 13 and the mortise and tenon grooves at the other end of the left and right ends of the Great Wall board 14 The tenon 13 With the tongue and groove 14 Has a corresponding structure. The mortise and tenon 14 The depth is greater than the tenon 13 length.

[0052] like Figure 3 As shown, the mold for preparing the above-mentioned Great Wall plate comprises a mold discharge plate 300 , flow channel forming plate 200 and die feed plate 100 The mold includes a plurality of mold plates connected together, and the mold includes a main channel 31 and a co-extruded flow channel located above the main flow channel 32 The main flow channel 31 There is a choke core rod inside 33 ; The flow channel forming plate 200 Including a first forming plate 201 , the second forming plate 202 and the third forming plate 203 The co-extrusion flow channel 32 is formed in the first plate 201 and the second forming plate 202 The junction starts with the main channel 31 Convergence; the co-extrusion flow channel 32 Feed port 320 Set on the third forming plate 203 The co-extrusion flow channel includes a feed section 321 , casting section 322 and discharge section 323 ; The feeding section 321 Set on the third forming plate 203 ; The casting section 322 Set on the second forming plate 202 ; The discharging section 323 Set on the first forming plate 201 The feeding section 321 is vertically arranged; the casting section 322 Including the feeding section 321 Connecting vertical segments 322-1 and discharge section323 Connecting oblique sections 322-2 The oblique section 322-2 Gradually taper along the floor extrusion direction.

[0053] That is to say, the top surface and the bottom surface are connected to form a sloped channel. Figure 5 It is indicated by a dotted line; Figure 5 yes Figure 3 The BB section view of the BB section, and this inclined channel is on the back and cannot be seen from this perspective, so Figure 5 It is indicated by dotted lines. It can also be seen that the inclined channel, i.e. the inclined section 322-2 The discharge section gradually shrinks along the extrusion direction of the floor. 323 Horizontally arranged and aligned with the main channel 31 The top surface is the second forming plate 202 With the third forming plate 203 The butted plane with concave area serves as the co-extrusion flow channel 32 vertical segment 322-1 In the second forming plate 202 The top surface formed on the bottom surface is the third forming plate 203 With the second forming plate 202 The butted flat surfaces with raised areas serve as co-extrusion channels 32 vertical segment 322-1 In the third forming plate 203 The bottom surface formed on.

[0054] like Figures 4-6 As shown, the third forming plate 203 With the second forming plate 202 The butted surface is a plane with a raised area; the outer surface of the raised area is the co-extrusion flow channel 32 In the second forming plate 202 The bottom surface formed on the feeding section 321 A first horizontal outlet is formed on the surface 321-1 The second forming plate 202 With the third forming plate 203 The butted surface is a plane with a recessed area; the top surface of the recessed area is the co-extrusion flow channel 32 In the second forming plate 202 The outer surface of the raised area is provided with a guide groove which gradually deepens along the discharge direction. 322-1-1 , and the guide groove 322-1-1 The bottom of the groove extends into the main channel.

[0055] Combine Figure 3 and Figure 6As shown; the vertical section 322-1 With feeding section 321 Horizontal and vertical bends are formed at the joints 32-1 , the horizontal and vertical bend 32-1 Set on the second forming plate 202 On the surface of the third forming plate 203; the vertical section 322-1 It is a cavity formed by excavation on this surface.

Claims

1. A Great Wall board, comprising a substrate (1) and a co-extruded coating layer (2) arranged on the surface of the substrate; characterized in that: The co-extruded coating layer (2) has a convex surface (21) and a concave surface (22) arranged at intervals, and the substrate has a substrate convex portion (11) corresponding to the convex surface (21) and a substrate concave portion (12) corresponding to the concave surface (22); a clamping structure is provided between the substrate concave portion (12) and the concave surface (22), and the clamping structure includes a groove (121) provided on the upper surface of the substrate concave portion (12) and a clamping head (221) provided on the lower surface of the concave surface (22); The groove (121) has a necking structure, and the clamping head (221) and the groove (121) have corresponding structures; A vacant area (111) is provided in the substrate raised portion (11); It also includes a mortise and tenon structure, the mortise and tenon structure including a tenon (13) provided at one of the left and right ends of the Great Wall plate and a tenon groove (14) provided at the other of the left and right ends of the Great Wall plate; the tenon (13) and the tenon groove (14) have corresponding structures; The depth of the mortise (14) is greater than the length of the tenon (13).

2. A mold for preparing the Great Wall plate as claimed in claim 1, which is formed by connecting a plurality of mold plates including a mold discharge plate (300), a flow channel forming plate (200) and a mold feed plate (100), and is characterized in that: The mold comprises a main flow channel (31) and a co-extrusion flow channel (32) located above the main flow channel; a flow-blocking core rod (33) is provided in the main flow channel (31); the end of the flow-blocking core rod (33) extends out of the mold discharge plate (300); The flow channel forming plate (200) comprises a first forming plate (201), a second forming plate (202) and a third forming plate (203); the co-extruded flow channel (32) begins to merge with the main flow channel (31) at the joint between the first forming plate (201) and the second forming plate (202); The feed port (320) of the co-extrusion flow channel (32) is provided on the third forming plate (203); The co-extrusion flow channel includes an inlet section (321), a casting section (322) and an outlet section (323); The feeding section (321) is provided on the third forming plate (203); The casting section (322) is arranged on the second forming plate (202); The discharge section (323) is provided on the first forming plate (201); The feeding section (321) is arranged vertically; The casting section (322) includes a vertical section (322-1) connected to the feeding section (321) and an inclined section (322-2) connected to the discharging section (323); the inclined section (322-2) gradually shrinks along the extrusion direction of the floor; the discharging section (323) is arranged horizontally and merges with the main channel (31); The surface where the third forming plate (203) and the second forming plate (202) meet is a plane provided with a raised area; the outer surface of the raised area is the bottom surface of the co-extrusion flow channel (32) formed on the second forming plate (202); the feeding section (321) forms a horizontal first outlet (321-1) on this surface; A guide groove is provided on the outer surface of the raised area and gradually deepens along the discharge direction, and the bottom of the guide groove extends into the main channel; The surface where the second forming plate (202) and the third forming plate (203) meet is a plane provided with a recessed area; the top surface of the recessed area is the top surface formed by the co-extrusion flow channel (32) on the second forming plate (202); A horizontal and vertical bend (32-1) is formed at the junction of the vertical section (322-1) and the feeding section (321); the horizontal and vertical bend (32-1) is arranged on the surface where the second forming plate (202) and the third forming plate (203) are in contact; the vertical section (322-1) is a cavity excavated on the surface.

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