Halogen-free insulating pc in-mold bending mold and halogen-free insulating pc in-mold bending method

Abstract

This invention provides an in-mold bending die and method for halogen-free insulating PC. The in-mold bending die includes a base, a first forming seat, and a second forming seat. The first and second forming seats are mounted on the base at intervals. The first forming seat is used to form the corner where the vertical sidewall connects to the transition sidewall in the halogen-free insulating PC, and the second forming seat is used to form the corner where the transition sidewall connects to the body in the halogen-free insulating PC. This in-mold bending die and method for halogen-free insulating PC solve the problem in the prior art that it is impossible to produce halogen-free insulating PC products with vertical sidewalls perpendicular to the body.

Description

Technical Field

[0001] This invention relates to the field of halogen-free insulating PC production, specifically to an in-mold bending die and method for halogen-free insulating PC. Background Technology

[0002] The applicant needs to apply for a product: halogen-free insulated PC, such as... Figure 1 as well as Figure 2 As shown, halogen-free insulating PC includes: a body, a reverse fold protrusion, a first downward fold protrusion, a second downward fold protrusion, two transition sidewalls, and two vertical sidewalls. Two inclined transition sidewalls extend from both sides of the body, and each transition sidewall extends into a vertical sidewall. Each vertical sidewall is perpendicular to the body. The two ends of the body are respectively recessed downwards to form the first and second downward fold protrusions. A notch is formed next to one end of the body, located next to the first downward fold protrusion, where a reverse fold protrusion is formed. In the manufacturing process, a flat strip of insulating PC raw material is used, and the two transition sidewalls and two vertical sidewalls are formed by a one-time stamping process. However, due to the good resilience of the insulating PC raw material, and because the vertical sidewalls need to remain perpendicular to the body, it is impossible to achieve the requirement of keeping the vertical sidewalls perpendicular to the body, thus hindering the production of high-quality halogen-free insulating PC products. Summary of the Invention

[0003] This invention provides an in-mold bending die and method for halogen-free insulating PC, solving the problem in the prior art that it is impossible to produce halogen-free insulating PC products with vertical sidewalls perpendicular to the body.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] The present invention first discloses an in-mold bending die for halogen-free insulating PC, comprising: a base, a first forming seat and a second forming seat, wherein the first forming seat and the second forming seat are installed on the base at intervals, the first forming seat is used to form the corner at the connection between the vertical sidewall and the transition sidewall in the halogen-free insulating PC, and the second forming seat is used to form the corner at the connection between the transition sidewall and the body in the halogen-free insulating PC.

[0006] Preferably, the side of the first molding seat has a first surface that is in close contact with the inner surface of the vertical sidewall, and the surface of the first molding seat has an arc surface that is in close contact with the transition sidewall. The center of the arc surface is located above the first molding seat, and the angle between the arc surface and the first surface is less than 90°.

[0007] Preferably, a first cutting support is installed on the base. The first cutting support is used to support the edge of the second lower fold protrusion when the second lower fold protrusion is cut and formed, and to support the reverse fold protrusion when the edge of the reverse fold protrusion is cut away from the body. The first cutting support is located on the side of the first forming seat away from the second forming seat.

[0008] Preferably, a second cutting support is installed between the first cutting support and the first forming base, the second cutting support being used for support when cutting the edge of the connection between two halogen-free insulated PCs.

[0009] Preferably, a third cutting support is installed on the side of the second molding seat opposite to the first molding seat. The third cutting support is used to support the middle part of the connection between the two halogen-free insulated PCs when cutting.

[0010] Preferably, a recessed support is installed between the first forming seat and the second cutting support seat, the recessed support being used to support the first and second lower folding protrusions during the pressing and forming process.

[0011] The present invention also discloses a method for in-mold bending of halogen-free insulating PC, comprising the following steps: obtaining halogen-free insulating PC products by cutting and stamping using an in-mold bending die for halogen-free insulating PC as described above.

[0012] Preferably, obtaining halogen-free insulated PC products by cutting and stamping using an in-mold bending die as described above includes the following steps:

[0013] S1. Pull out the insulating PC raw material so that the insulating PC raw material passes through a halogen-free insulating PC in-mold bending die as described above.

[0014] S2. Using a first cutting device aligned with the first cutting support, cut the edge of the second downward folded protrusion and the edge of the reverse folded protrusion away from the body on the insulating PC raw material.

[0015] S3. Use the second cutting device corresponding to the second cutting support to cut the edge where the two halogen-free insulated PCs are connected.

[0016] S4. Using a first stamping device, the first stamping device is provided with a first stamping head and a second stamping head. The first stamping head is aligned with the first forming seat, and the second stamping head is aligned with the recessed support seat. The vertical sidewall is bent relative to the first forming seat between the first stamping head and the first forming seat. The first downward folding protrusion and the second downward folding protrusion are both formed between the second stamping head and the support seat.

[0017] S5. Using a second stamping device, the third stamping head on the second stamping device is aligned with the second forming seat, and the transition sidewall is bent relative to the body between the third stamping head and the second forming seat.

[0018] S6. Using the third cutting device, align the third cutting device with the third cutting support table, and cut the middle part of the connection between the two halogen-free insulated PCs to obtain the finished halogen-free insulated PC product.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The target product obtained by this design is halogen-free insulated PC, which has two bends: the first bend is at the connection between the vertical sidewall and the transition sidewall; the second bend is at the connection between the transition sidewall and the main body. This application adopts separate first and second molding seats, achieving the requirement that the final vertical sidewall is perpendicular to the main body through two bends, thus meeting the product requirements.

[0021] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0022] Figure 1 This is a structural diagram of a halogen-free insulating PC product.

[0023] Figure 2 This is a structural diagram of a halogen-free insulating PC product.

[0024] Figure 3 This is a schematic diagram of the structure of an in-mold bending die for halogen-free insulated PC.

[0025] Figure 4 This is a schematic diagram of the structure of the first molding seat on one side.

[0026] Figure 5 This is a schematic diagram of the structure of the second molding seat on one side.

[0027] Figure 6 This is a schematic diagram of the structure of the entire insulating PC in the bending die inside the halogen-free insulating PC mold during the production process.

[0028] Figure 7 This is a side view of three states during the production process of a halogen-free insulating PC mold.

[0029] Reference numerals: Body 11, Reverse fold protrusion 12, First downward fold protrusion 13, Second downward fold protrusion 14, Transition sidewall 15, Vertical sidewall 16, Base 21, First molding seat 22, First surface 221, Arc surface 222, Second molding seat 23, First cutting support seat 24, Second cutting support seat 25, Third cutting support seat 26, Recessed support seat 27. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention clearer and easier to understand, the invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0031] Example 1:

[0032] like Figures 1 to 7 As shown, the present invention first discloses an in-mold bending die for halogen-free insulating PC, including: a base 21, a first forming seat 22 and a second forming seat 23. The base 21 is equipped with the first forming seat 22 and the second forming seat 23 spaced apart from each other. The first forming seat 22 is used to form the corner at the connection between the vertical sidewall 16 and the transition sidewall 15 in the halogen-free insulating PC, and the second forming seat 23 is used to form the corner at the connection between the transition sidewall 15 and the body 11 in the halogen-free insulating PC.

[0033] The first forming seat 22 has a first surface 221 formed on its side that is in close contact with the inner surface of the vertical sidewall 16. The surface of the first forming seat 22 also has an arcuate surface 222 that is in close contact with the transition sidewall 15. The center of the arcuate surface 222 is located above the first forming seat 22, and the angle between the arcuate surface 222 and the first surface 221 is less than 90°. Both bending angles are 45°. Due to the high springback force of the insulating PC material, when the connection between the vertical sidewall 16 and the transition sidewall 15 in the insulating PC material is bent at 90°, the springback angle is greater than 45°, failing to reach the required 45°. Therefore, the arcuate surface 222 is provided. The arcuate surface 222 causes the transition sidewall 15 to warp upwards during stamping, thus making the bending angle greater than 90°. That is, after bending, the angle between the corresponding arcuate surface 222 and the first surface 221 is less than 90°, and after springback, the vertical sidewall 16 and the transition sidewall 15 can achieve a 135° angle.

[0034] A first cutting support 24 is mounted on the base 21. The first cutting support 24 supports the edge of the second lower fold protrusion 14 when the end of the second lower fold protrusion 14 is being cut and formed, and also supports the reverse fold protrusion 12 when the edge of the reverse fold protrusion 12 facing away from the body 11 is being cut. The first cutting support 24 is located on the side of the first forming seat 22 facing away from the second forming seat 23. The first cutting support 24 includes a U-shaped block and an L-shaped block. The U-shaped block supports the cutting of the edge of the second lower fold protrusion 14, and the L-shaped block supports the cutting of the edge of the reverse fold protrusion 12 facing away from the body 11. This allows for the cutting of both the edge of the second lower fold protrusion 14 and the edge of the reverse fold protrusion 12 facing away from the body 11 first, and also facilitates subsequent positioning.

[0035] A second cutting support 25 is installed between the first cutting support 24 and the first forming support 22. The second cutting support 25 is used to support the edge where two halogen-free insulated PC parts are connected when cutting. A third forming support is also formed at the second cutting support 25. The third forming support is used to form the bending at the edge of the vertical sidewall 16. This separates the two adjacent halogen-free insulated PC parts, facilitating subsequent edge bending and forming. At the same time, the edge where the reverse folding protrusion 12 connects to the body 11 is also cut at the second cutting support 25, so that the reverse folding protrusion 12 can be cut out. Cutting in two stages avoids excessive deformation at the cut point of the reverse folding protrusion 12 caused by cutting in one go, thus ensuring product quality.

[0036] A third cutting support 26 is installed on the side of the second forming seat 23 opposite to the first forming seat 22. The third cutting support 26 is used to support the connection between two halogen-free insulated PCs when cutting. This allows the two adjacent halogen-free insulated PCs to be fully separated.

[0037] A recessed support 27 is installed between the first forming seat 22 and the second cutting support seat 25. The recessed support 27 is used to support the first lower fold protrusion 13 and the second lower fold protrusion 14 during the pressing and forming process. This guides the first lower fold protrusion 13 and the second lower fold protrusion 14 to be stamped and formed.

[0038] Example 2:

[0039] like Figures 1 to 7 As shown, the present invention also discloses a method for in-mold bending of halogen-free insulating PC, comprising the following steps: obtaining halogen-free insulating PC products by cutting and stamping using an in-mold bending die for halogen-free insulating PC as described in Example 1 above.

[0040] Obtaining halogen-free insulating PC products by cutting and stamping using an in-mold bending die as described in Example 1 above includes the following steps:

[0041] S1. Pull out the insulating PC raw material so that the insulating PC raw material passes through a halogen-free insulating PC in-mold bending die as described in Example 1; (During operation, the insulating PC raw material passes through the first cutting support seat 24, the second cutting support seat 25, the recessed support seat 27, the first forming seat 22, the second forming seat 23 and the third cutting support seat 26 in sequence)

[0042] S2. Using a first cutting device aligned with the first cutting support 24, cut the end edge of the second downward folded protrusion 14 and the edge of the reverse folded protrusion 12 away from the body 11 on the insulating PC raw material; (During this cutting process, a positioning hole is formed between the two halogen-free insulating PCs to facilitate positioning during subsequent transmission).

[0043] S3. Use the second cutting device corresponding to the second cutting support 25 to cut the edge where the two halogen-free insulated PCs are connected; (At the same time, cut the edge of the reverse protrusion 12 near the body 11. Cut the reverse protrusion 12 in two steps. Since the edge of the reverse protrusion 12 to be cut has a U-shaped structure and the product material is elastic, it is very easy to pull the cutting edge during cutting, resulting in the phenomenon that the width of the reverse protrusion 12 is not complete or too narrow after cutting, resulting in low product quality. Cutting in two steps will prevent the cutting line from forming an uncompressible U-shaped loop. Therefore, the edge is neater and the quality is better after cutting.)

[0044] S4. Using a first stamping device, the first stamping device is provided with a first stamping head and a second stamping head. The first stamping head is aligned with the first forming seat 22, and the second stamping head is aligned with the recessed support seat 27. The vertical sidewall 16 is bent relative to the transition sidewall 15 between the first stamping head and the first forming seat 22. The first downward folding protrusion 13 and the second downward folding protrusion 14 are both formed between the second stamping head and the support seat. (The first stamping head forms an arc-shaped pressing surface and a first pressing surface corresponding to the first forming seat 22.) The vertical sidewall 16 is pressed between the pressing surface and the first surface 221, and the transition sidewall 15 is pressed between the arc pressing surface and the arc surface 222, causing the transition sidewall 15 to tilt upwards during the pressing process. This ensures that the angle between the transition sidewall 15 and the vertical sidewall 16 is less than 90 degrees during the pressing process, thus meeting the requirement of excessive springback. After springback, the angle between the transition sidewall 15 and the vertical sidewall 16 is 135 degrees. The arc pressing surface has no effect on the transition sidewall 15, and the transition sidewall 15 remains flat after springback.

[0045] S5. Using the second stamping device, the third stamping head on the second stamping device is aligned with the second forming seat 23, causing the transition sidewall 15 to bend relative to the body 11. (Due to the deformation in step S4, the transition sidewall 15 remains flat after springback, but there is still some deformation at the connection between the transition sidewall 15 and the body 11, resulting in insufficient elasticity at the connection between the body 11 and the transition sidewall 15. Therefore, the bending angle in this step is 90°, and after springback, the angle between the transition sidewall 15 and the body 11 is 135 degrees. Finally, the angle between the vertical sidewall 16 and the body 11 is 90°, which meets the product requirements.)

[0046] S6. Using the third cutting device, align the third cutting device with the third cutting support table, and cut the middle part of the connection between the two halogen-free insulated PCs to obtain the finished halogen-free insulated PC product.

[0047] In step S4, the angle at which the vertical sidewall 16 bends relative to the transition sidewall 15 is greater than 90°.

[0048] In step S5, the angle at which the transition sidewall 15 bends relative to the body 11 is greater than 135°.

[0049] In this application, firstly, by discovering that the raw material has good resilience, the product is designed to undergo two bends, ultimately making the vertical sidewall 16 perpendicular to the body 11. Correspondingly, two bending dies are provided: a first forming seat 22 and a second forming seat 23. Then, by setting a first surface 221 and an arc surface 222 on the first forming seat 22, the setting of the first surface 221 and the arc surface 222 makes the stamping angle less than 90°. Since the stamping direction is vertical, it is impossible to achieve a stamping angle of less than 90° between the body 11 and the vertical sidewall 16. However, the design of the annular surface causes the transition sidewall 15 to curve upwards, which is conducive to a small stamping angle. By providing a 90° angle, a 135° angle is directly formed at the connection between the vertical sidewall 16 and the transition sidewall 15 after a single stamping. This avoids the increased production costs and reduced production efficiency that would otherwise require two stampings at the connection between the vertical sidewall 16 and the transition sidewall 15. Finally, because the transition sidewall 15 tilts upwards after the first stamping, although it can spring back to a flat position, the elasticity at the connection between the transition sidewall 15 and the body 11 weakens, reducing its rebound performance. Therefore, during the second stamping, the angle between the transition sidewall 15 and the body 11 is 90°, which also ensures that the springback after stamping forms a 135° angle at the connection between the transition sidewall 15 and the body 11. The entire process is reliable, produces high-quality products, and meets the requirement that the vertical sidewall 16 and the body 11 are perpendicular.

[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. A halogen-free insulating PC in-mold bending die, characterized in that, include: The base, the first molding seat and the second molding seat are installed on the base. The first molding seat is used to form the corner where the vertical sidewall and the transition sidewall of the halogen-free insulating PC are connected. The second molding seat is used to form the corner where the transition sidewall and the body of the halogen-free insulating PC are connected. The process of obtaining halogen-free insulating PC products by cutting and stamping using an in-mold bending die includes the following steps: S1. Pull out the insulating PC raw material so that the insulating PC raw material passes through the halogen-free insulating PC in-mold bending die. S2. Using a first cutting device aligned with the first cutting support, cut the edge of the second downward folded protrusion and the edge of the reverse folded protrusion away from the body on the insulating PC raw material. S3. Use the second cutting device corresponding to the second cutting support to cut the edge where the two halogen-free insulated PCs are connected. S4. Using a first stamping device, the first stamping device is provided with a first stamping head and a second stamping head. The first stamping head is aligned with a first forming seat, and the second stamping head is aligned with a recessed support seat. The vertical sidewall is bent relative to the transition sidewall between the first stamping head and the first forming seat. The first downward folding protrusion and the second downward folding protrusion are both formed between the second stamping head and the support seat. A first surface is formed on the side of the first forming seat that is in close contact with the inner surface of the vertical sidewall. An arc surface is formed on the surface of the first forming seat that is in close contact with the transition sidewall. The angle between the arc surface and the first surface is less than 90°. S5. Using the second stamping device, the third stamping head on the second stamping device is aligned with the second forming seat, and the transition sidewall is bent relative to the body between the third stamping head and the second forming seat; during the second stamping, the angle between the transition sidewall and the body is 90°. S6. Using the third cutting device, align the third cutting device with the third cutting support table, and cut the middle part of the connection between the two halogen-free insulated PCs to obtain the finished halogen-free insulated PC product.

2. The halogen-free insulating PC in-mold bending die according to claim 1, characterized in that, A first cutting support is installed on the base. The first cutting support is used to support the edge of the second lower fold protrusion when the second lower fold protrusion is cut and formed, and to support the reverse fold protrusion when the edge of the reverse fold protrusion is cut away from the body. The first cutting support is located on the side of the first forming seat away from the second forming seat.

3. The halogen-free insulating PC in-mold bending die according to claim 2, characterized in that, A second cutting support is installed between the first cutting support and the first forming base. The second cutting support is used to support the edge when cutting the connection between two halogen-free insulated PCs.

4. The halogen-free insulating PC in-mold bending die according to claim 3, characterized in that, A third cutting support is installed on the side of the second molding seat away from the first molding seat. The third cutting support is used to support the middle part of the connection between the two halogen-free insulated PCs when cutting.

5. The halogen-free insulating PC in-mold bending die according to claim 4, characterized in that, A recessed support seat is installed between the first forming seat and the second cutting support seat. The recessed support seat is used to support the first and second lower folding protrusions when they are pressed down for forming.

6. A method for in-mold bending of halogen-free insulating PC, characterized in that, The process includes the following steps: obtaining halogen-free insulated PC products by cutting and stamping using an in-mold bending die for halogen-free insulated PC as described in any one of claims 1 to 5.

Images