Small-radius arc-shaped paint-free drawing panel and manufacturing method thereof

Abstract

The invention provides a small-radius arc-shaped paint-free drawing panel and a manufacturing method thereof. The problems that in the prior art, the requirements for the width and depth of a notch and the size adaptation degree of an arc-shaped line are extremely high, plate face breakage, creases, orange patterns and the like are prone to occurring in the machining process, and consequently material loss is large, and product production time is long are solved. The groove is formed in the paint-free plate, it is guaranteed that the transition part does not make contact with the bottom of the groove in the bending process and is not prone to breakage after the paint-free plate is bent, the second groove body is filled with glue, standing is conducted for a period of time after glue filling, a small amount of water in the adhesive is injected into the balance layer, creases are reduced in the bending process, the flatness of the bent position is improved, and the service life of the paint-free plate is prolonged. The production difficulty is obviously reduced, and the production cost is further reduced.

Description

Technical Field

[0001] The invention relates to the technical field of paint-free panels, and in particular to a small-radius arc-shaped paint-free drawable panel and a manufacturing method thereof. Background Art

[0002] Curved paint-free boards have been widely used in the field of home decoration due to their unique decorative effects and excellent practical performance, such as curved cabinet door panels, curved wall panels, curved closing strips, etc. Conventional curved board R>50mm bending processes often use methods such as steam hot bending, laminated bending, and solid wood milling; when making curved paint-free boards with a small radius R≤50mm, due to the small curvature angle, the incision bending method tends to be used, that is, a cut corresponding to the circumference of the arc angle is milled on the board surface, and then the arc lines are bent and filled. However, this process has extremely high requirements on the width, depth, and dimensional adaptability of the incisions and arc lines. During the processing process, problems such as board breakage, creases, and orange peels are prone to occur, resulting in large material loss. In actual production, there is repetitive work of adjusting the incision specifications and the size of the arc lines many times. The product production takes a long time and is difficult to achieve mass production. There is room for improvement in the existing technology. Summary of the invention

[0003] In view of the above existing situation, the present invention provides a small radius arc paint-free drawer panel and a manufacturing method thereof, and the specific steps are as follows: Step 1, milling grooves: the paint-free board includes a substrate layer, a balancing layer and a finishing layer arranged on both sides of the substrate layer. After the paint-free board is fixed, a groove arranged along the center line of the bending point is processed on one side of the paint-free board. The groove runs through the two sides of the paint-free board. The groove includes a first groove body and a second groove body. The first groove body is located above the second groove body. The two sides of the first groove body form inclined surfaces extending along the length direction of the first groove body and used to fit each other after bending. The width of the first groove body gradually decreases from top to bottom. The two sides of the second groove body extend to both sides relative to the bottom of the first groove body, and form a transition portion that gradually bends upward from outside to inside. The transition portion is arc-shaped, and the end of the transition portion facing the second groove body is connected to the lower end of the inclined surface through a connecting portion. The connecting portion is arc-shaped. The sum of the thickness of the balancing layer and the finishing layer below the groove is 0.4-1mm, and the thickness of the finishing layer is 0.15-0.2mm. Step 2: Glue coating: fill the second tank with adhesive, the adhesive is polyurethane structural adhesive, and the coating amount is 600-800g / ㎡; Step 3: Let the board stand for 1-2 minutes after applying glue; Step 4, bending: bend the plate so that the inclined surfaces on both sides of the groove fit each other, fix the paint-free plate, and keep it in the bent state; Step 5: Edge banding: Use edge banding strips to bandage the paint-free board around the edges.

[0004] Preferably, three quarters of the radius of the transition portion is the same as the sum of the heights of the inclined surface and the connecting portion.

[0005] Preferably, a side of the inclined surface away from the groove and a side of the transition portion away from the groove are located in the same vertical direction.

[0006] Preferably, the angle between the two inclined surfaces is 85-95 degrees.

[0007] Preferably, the radius of the connecting portion is 1-4 mm.

[0008] Preferably, the thickness of the edge banding strip in step 5 is 0.6 mm. Compared with the prior art, the present invention opens a groove on the paint-free board and fills glue in the second groove. After filling the glue, it is left to stand for a period of time so that a small amount of moisture in the adhesive can be injected into the balancing layer, which reduces creases during bending and increases the flatness of the bending part, thereby significantly reducing the production difficulty and further reducing the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a schematic diagram of the structure after milling grooves on the paint-free board.

[0010] Figure 2 Schematic diagram of the structure after the paint-free plate is bent.

[0011] Figure 3 It is a schematic diagram of the structure of the groove.

[0012] Markings in the figure: 1, paint-free board; 2, groove; 3, base material layer; 4, balance layer; 5, finishing layer; 6, second trough body; 7, inclined surface; 8, transition part; 9, connecting part; 10, first trough body. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings: Example 1

[0014] like Figure 1-3 As shown, a small radius arc-shaped paint-free drawer panel and a manufacturing method thereof, the specific steps are as follows: Step 1, milling groove: the paint-free board 1 includes a substrate layer 3, a balancing layer 4 and a finishing layer 5 arranged on both sides of the substrate layer 3. After fixing the paint-free board 1, a groove 2 arranged along the center line of the bending part is processed on one side of the paint-free board 1. The groove 2 runs through the two sides of the paint-free board 1. The groove 2 includes a first groove body 10 and a second groove body 6. The first groove body 10 is located above the second groove body 6. The two sides of the first groove body 10 form inclined surfaces 7 extending along the length direction of the first groove body 10 and used to fit each other after bending. The width of the first trough body 10 gradually decreases from top to bottom. The two sides of the second trough body 6 extend to both sides relative to the bottom of the first trough body 10, and form a transition portion 8 that gradually bends upward from outside to inside. The transition portion 8 is arc-shaped, and one end of the transition portion 8 facing the second trough body 6 is connected to the lower end of the inclined surface 7 through a connecting portion 9. The connecting portion 9 is arc-shaped. The sum of the thickness of the balancing layer 4 and the finishing layer 5 below the groove 2 is 0.4 mm, and the thickness of the finishing layer 5 is 0.15 mm. Step 2: Glue coating: fill the second tank 6 with adhesive, the adhesive is polyurethane structural adhesive, and the coating amount is 600g / ㎡; Step 3, let stand: after gluing, let the board stand for 1 minute, so that a small amount of water in the adhesive can be injected into the balance layer 4, reducing creases and increasing the flatness of the bends; Step 4, bending: bend the plate so that the inclined surfaces 7 on both sides of the groove 2 fit each other, fix the paint-free plate 1, and keep it in the bent state; Step 5: Edge banding: Use edge banding strips to bandage the paint-free board 1 around its edges.

[0015] By opening a groove 2 on the paint-free board 1 and filling glue in the second groove 6, and letting it stand for a period of time after filling, a small amount of moisture in the adhesive is injected into the balancing layer 4, which reduces creases during bending and increases the flatness of the bending part, significantly reducing the production difficulty and further reducing the production cost.

[0016] The finishing layer 5 and part of the balancing layer 4 are retained at the bottom of the groove 2, which have certain flexibility and toughness, and are not easy to break when bending. Three quarters of the radius of the transition portion 8 is the same as the sum of the heights of the above-mentioned inclined surface 7 and the connecting portion 9. The angle between the two inclined surfaces 7 is 85 degrees. The radius of the connecting portion 9 is 1mm, and the thickness of the edge banding strip in step five is 0.6mm. By setting the connecting portion 9 and the transition portion 8, the paint-free board 1 is ensured that the transition portion 8 does not contact the bottom of the groove 2 during the bending process after being bent, and is not easy to break. The maximum distance between the two transition portions 8 is the arc length required after bending. Example 2

[0017] like Figure 1-3 As shown, a small radius arc-shaped paint-free drawer panel and a manufacturing method thereof, the specific steps are as follows: Step 1, milling groove: the paint-free board 1 includes a substrate layer 3, a balancing layer 4 and a finishing layer 5 arranged on both sides of the substrate layer 3. After fixing the paint-free board 1, a groove 2 arranged along the center line of the bending part is processed on one side of the paint-free board 1. The groove 2 runs through the two sides of the paint-free board 1. The groove 2 includes a first groove body 10 and a second groove body 6. The first groove body 10 is located above the second groove body 6. The two sides of the first groove body 10 form inclined surfaces 7 extending along the length direction of the first groove body 10 and used to fit each other after bending. The width of the first trough body 10 gradually decreases from top to bottom. The two sides of the second trough body 6 extend to both sides relative to the bottom of the first trough body 10, and form a transition portion 8 that gradually bends upward from outside to inside. The transition portion 8 is arc-shaped, and one end of the transition portion 8 facing the second trough body 6 is connected to the lower end of the inclined surface 7 through a connecting portion 9. The connecting portion 9 is arc-shaped. The sum of the thickness of the balancing layer 4 and the finishing layer 5 below the groove 2 is 0.7 mm, and the thickness of the finishing layer 5 is 0.17 mm. Step 2: Glue coating: fill the second tank 6 with adhesive, the adhesive is polyurethane structural adhesive, and the coating amount is 700g / ㎡; Step 3, let stand: after gluing, let the board stand for 1 minute, so that a small amount of water in the adhesive can be injected into the balance layer 4, reducing creases and increasing the flatness of the bends; Step 4, bending: bend the plate so that the inclined surfaces 7 on both sides of the groove 2 fit each other, fix the paint-free plate 1, and keep it in the bent state; Step 5: Edge banding: Use edge banding strips to bandage the paint-free board 1 around its edges.

[0018] By opening a groove 2 on the paint-free board 1 and filling glue in the second groove 6, and letting it stand for a period of time after filling, a small amount of moisture in the adhesive is injected into the balancing layer 4, which reduces creases during bending and increases the flatness of the bending part, significantly reducing the production difficulty and further reducing the production cost.

[0019] The finishing layer 5 and part of the balancing layer 4 are retained at the bottom of the groove 2, which have certain flexibility and toughness, and are not easy to break when bending. Three quarters of the radius of the transition portion 8 is the same as the sum of the heights of the above-mentioned inclined surface 7 and the connecting portion 9. The angle between the two inclined surfaces 7 is 90 degrees. The radius of the connecting portion 9 is 2mm, and the thickness of the edge banding strip in step five is 0.6mm. By setting the connecting portion 9 and the transition portion 8, the paint-free board 1 is ensured that the transition portion 8 does not contact the bottom of the groove 2 during the bending process after being bent, and is not easy to break. The maximum distance between the two transition portions 8 is the arc length required after bending. Example 3

[0020] like Figure 1-3 As shown, a small radius arc-shaped paint-free drawer panel and a manufacturing method thereof, the specific steps are as follows: Step 1, milling grooves: the paint-free board 1 includes a substrate layer 3, a balancing layer 4 and a finishing layer 5 arranged on both sides of the substrate layer 3. After the paint-free board 1 is fixed, a groove 2 arranged along the center line of the bending point is processed on one side of the paint-free board 1. The groove 2 runs through the two sides of the paint-free board 1. The groove 2 includes a first groove body 10 and a second groove body 6. The first groove body 10 is located above the second groove body 6. The first groove body 10 is formed on both sides of the first groove body 10. Inclined surfaces 7 extending along the length direction of the first groove body 10 and used to fit each other after bending are formed. The width of the first groove body 10 gradually decreases from top to bottom. The two sides of the second groove body 6 extend to both sides relative to the bottom of the first groove body 10, and form a transition portion 8 that gradually bends upward from outside to inside. The transition portion 8 is arc-shaped, and the end of the transition portion 8 facing the second groove body 6 is connected to the lower end of the inclined surface 7 through a connecting portion 9. The connecting portion 9 is arc-shaped. The sum of the thicknesses of the balancing layer 4 and the finishing layer 5 below the groove 2 is 1 mm, and the thickness of the finishing layer 5 is 0.2 mm. Step 2: Glue coating: fill the second tank 6 with adhesive, the adhesive is polyurethane structural adhesive, and the coating amount is 600g / ㎡; Step 3, let stand: after gluing, let the board stand for 2 minutes, so that a small amount of water in the adhesive can be injected into the balance layer 4, reducing creases and increasing the flatness of the bends; Step 4, bending: bend the plate so that the inclined surfaces 7 on both sides of the groove 2 fit each other, fix the paint-free plate 1, and keep it in the bent state; Step 5: Edge banding: Use edge banding strips to bandage the paint-free board 1 around its edges.

[0021] By opening a groove 2 on the paint-free board 1 and filling glue in the second groove 6, and letting it stand for a period of time after filling, a small amount of moisture in the adhesive is injected into the balancing layer 4, which reduces creases during bending and increases the flatness of the bending part, significantly reducing the production difficulty and further reducing the production cost.

[0022] The finishing layer 5 and part of the balancing layer 4 are retained at the bottom of the groove 2, which have certain flexibility and toughness, and are not easy to break when bending. Three quarters of the radius of the transition portion 8 is the same as the sum of the heights of the above-mentioned inclined surface 7 and the connecting portion 9. The angle between the two inclined surfaces 7 is 95 degrees. The radius of the connecting portion 9 is 4mm, and the thickness of the edge banding strip in step five is 0.6mm. By setting the connecting portion 9 and the transition portion 8, the paint-free board 1 is ensured that the transition portion 8 does not contact the bottom of the groove 2 during the bending process after bending, and is not easy to break. The maximum distance between the two transition portions 8 is the arc length required after bending.

[0023] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, the obvious changes or changes in the description derived therefrom are still within the scope of protection of the present invention.

Claims

1. A small radius arc paint-free drawer panel and a manufacturing method thereof, characterized in that: The specific steps are as follows: Step 1: milling grooves: the paint-free board (1) comprises a base material layer (3), a balancing layer (4) and a finishing layer (5) arranged on both sides of the base material layer (3); after fixing the paint-free board (1), a groove (2) arranged along the center line of the part to be bent is processed on one side of the paint-free board (1); the groove (2) runs through both sides of the paint-free board (1); the groove (2) comprises a first groove body (10) and a second groove body (6); the first groove body (10) is located above the second groove body (6); both sides of the first groove body (10) form inclined surfaces (7) extending along the length direction of the first groove body (10) and used to fit each other after bending; The width of the first groove body (10) gradually decreases from top to bottom, the two sides of the second groove body (6) extend to the two sides relative to the bottom of the first groove body (10), and form a transition portion (8) that gradually bends upward from the outside to the inside, the transition portion (8) is arc-shaped, and one end of the transition portion (8) facing the second groove body (6) is connected to the lower end of the inclined surface (7) through a connecting portion (9), the connecting portion (9) is arc-shaped, the sum of the thickness of the balancing layer (4) and the finishing layer (5) below the groove (2) is 0.4-1 mm, and the thickness of the finishing layer (5) is 0.15-0.2 mm; Step 2: Glue coating: Fill the second tank (6) with adhesive, wherein the adhesive is polyurethane structural adhesive, and the coating amount is 600-800 g / m2; Step 3: Let stand: After applying the glue, let the paint-free board (1) stand for 1-2 minutes; Step 4, bending: bending the paint-free plate (1) so that the inclined surfaces (7) on both sides of the groove (2) fit each other, fixing the paint-free plate (1) and maintaining the bent state; Step 5: Edge banding: Use edge banding strips to bandage the paint-free board (1) around its edges.

2. The small-radius arc-shaped paint-free drawer panel and the manufacturing method thereof according to claim 1, characterized in that: Three quarters of the radius of the transition portion (8) is the same as the sum of the heights of the inclined surface (7) and the connecting portion (9).

3. The small radius arc paint-free drawer panel and the manufacturing method thereof according to claim 1, characterized in that: The side of the inclined surface (7) away from the groove (2) and the side of the transition portion (8) away from the groove (2) are located in the same vertical direction.

4. The small-radius arc-shaped paint-free drawer panel and the manufacturing method thereof according to claim 1, characterized in that: The angle between the two inclined surfaces (7) is 85-95 degrees.

5. The small-radius arc-shaped paint-free drawer panel and the manufacturing method thereof according to claim 1, characterized in that: The radius of the connecting portion (9) is 1-4 mm.

6. The small-radius arc-shaped paint-free drawer panel and the manufacturing method thereof according to claim 1, characterized in that: The thickness of the edge banding described in step 5 is 0.6 mm.

Images