A mold structure for side trimming

Abstract

This utility model relates to the field of molds and discloses a mold structure for side trimming, including an upper mold base and a lower mold base. A pressure plate is elastically and vertically mounted on the bottom of the upper mold base, and a support base is fixedly mounted on the lower mold base. A cutting tool is mounted on the lower mold base. A transverse demolding structure is provided on the side wall of the support base near the scrap material, which drives the side plate of the workpiece to elastically deform away from the support base when the cutting tool detaches from the workpiece, thereby detaching the workpiece from the support base. A longitudinal demolding structure is provided on the upper end surface of the support base, which drives the workpiece to move upward relative to the support base when the pressure plate detaches from the support base. In this side trimming mold structure, after the cutting tool detaches from the side plate, the transverse demolding structure automatically drives the side plate to elastically deform away from the support base, ensuring that the side plate detaches from the support base. Subsequently, when the pressure plate detaches from the workpiece, the longitudinal demolding structure automatically drives the workpiece to move upward relative to the support base, thereby completing the demolding. The workpiece automatically completes demolding during the mold opening process, making demolding convenient.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a mold structure for side trimming. Background Technology

[0002] The front lower control arm is an important safety structural component in the automotive chassis. It is made by pressing high-strength thick steel plates with cold stamping dies. However, there will be excess waste material at the lower end of the side plate of the stamped front lower control arm. Therefore, a side trimming die is needed to remove the excess waste material.

[0003] Chinese Patent Application No. 201822185519.8 discloses a composite mechanism for side shaping and trimming of an automotive side panel, comprising an upper mold base and a lower mold base arranged vertically. The upper mold base has a pressure plate and a wedge-shaped drive block at its bottom. The pressure plate is fixedly connected to the upper mold base via a second return spring. An extrusion guide plate is attached to the inclined side of the drive block, and an upper inclined guide plate with an inclined guide edge is attached to its vertical side. A trolley is slidably arranged inside the lower mold base. A first return spring fixed to the lower mold base and a lower inclined guide plate cooperating with the upper inclined guide plate are located at the right end of the trolley. A shaping slider is slidably arranged at the middle position of the horizontal part of the trolley. The right side of the shaping slider is a beveled edge cooperating with the extrusion guide plate. A trimming groove and a shaping groove are located at the lower left corner of the shaping slider. An upwardly extending movable punch is located at the left end of the trolley. A fixed punch is located on the protrusion at the left end of the lower mold base. The pressure plate, fixed punch, and movable punch are arranged vertically in correspondence.

[0004] During the mold closing process, the drive block first moves the movable punch away from the fixed punch to a preset position. Then, the pressure plate cooperates with the fixed punch and the movable punch to clamp the workpiece. Finally, the drive block drives the shaping slider to slide horizontally to perform side trimming (waste removal) and shaping on the side plate of the workpiece. When the mold opens, the shaping slider first moves away from the workpiece, then the pressure plate disengages from the workpiece, and finally the movable punch moves closer to the fixed punch, so that the shaped workpiece can be ejected longitudinally.

[0005] However, during the side trimming process, when the waste material on the side plate of the workpiece is cut in the trimming groove (tool), the cutting surface will be slightly deformed in the cutting direction, which may cause the workpiece to get stuck on the movable punch and be difficult to remove. As a result, the workpiece will always move with the movable punch, that is, the workpiece will always be stuck on the mold, making demolding difficult and requiring workers to assist in demolding. Utility Model Content

[0006] This invention addresses the shortcomings of existing technologies where slight deformation of the cutting surface occurs when a tool cuts waste material on the side plate of a workpiece, potentially causing the workpiece to become stuck in the mold and difficult to remove, resulting in demolding difficulties. It provides a side trimming mold structure that facilitates workpiece demolding.

[0007] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0008] A side trimming mold structure includes an upper mold base and a lower mold base. A pressure plate is elastically and vertically mounted on the bottom of the upper mold base. A support base is fixedly mounted on the lower mold base, which can cooperate with the pressure plate to clamp the workpiece when the mold is closed. A cutting tool is mounted on the lower mold base to horizontally move and cut off the waste material on the side plate of the workpiece when the pressure plate and the support base clamp the workpiece and the upper and lower mold bases continue to close. When the upper and lower mold bases open and the upper and lower mold bases are still clamping the workpiece, the cutting tool moves horizontally away from the workpiece. A transverse demolding structure is mounted on the side wall of the support base near the waste material, which drives the side plate of the workpiece to elastically deform away from the support base to disengage from the support base when the cutting tool disengages from the workpiece. A longitudinal demolding structure is mounted on the upper end face of the support base, which drives the workpiece to move upward relative to the support base when the pressure plate disengages from the support base.

[0009] Using the above scheme, due to the transverse cutting of the tool, the cutting surface will undergo slight deformation in the transverse direction. Therefore, it is necessary to first demold the side plate transversely. During the mold closing process, the pressure plate first cooperates with the support base to clamp and position the workpiece. Then, the tool moves closer to the support base to cut the waste material at the end of the side plate. When the mold opens, the tool first moves away from the side plate. After the tool disengages from the side plate, the transverse demolding structure automatically drives the side plate to undergo elastic deformation away from the support base, ensuring that the side plate disengages from the support base. Subsequently, the pressure plate rises to disengage from the workpiece. After the pressure plate disengages from the workpiece, the longitudinal demolding structure automatically drives the workpiece to move upward relative to the support base, thus completing the demolding. The workpiece is automatically demolded during the mold opening process without the need for worker assistance, making demolding convenient.

[0010] Preferably, the longitudinal demolding structure includes a lifting block that is elastically raised and lowered on the upper end face of the support base. When the pressure plate clamps the workpiece with the support base, the lifting block elastically retracts into the support base and extends elastically to drive the workpiece to move upward relative to the support base for demolding when the resistance from the pressure plate on the workpiece disappears.

[0011] Using the above scheme, the workpiece is placed on the support base and overlaps with the upper surface of the lifting block. When the pressure plate descends, it first contacts the workpiece and then drives the workpiece to descend synchronously until the workpiece is in contact with the upper surface of the support base. At this time, the pressure plate and the support base cooperate to clamp the workpiece. At the same time, the lifting block is squeezed and elastically retracts into the support base. When the pressure plate rises until it separates from the workpiece, the resistance from the pressure plate on the workpiece disappears, the lifting block elastically rises and resets, driving the workpiece to move upward relative to the support base, thus completing the longitudinal demolding.

[0012] Preferably, the upper end face of the support base is recessed with a lifting groove for the lifting block to move up and down, and a first spring is provided between the lifting groove and the lifting block along the lifting direction of the lifting block to drive the lifting block to partially extend out of the support base under normal conditions.

[0013] Using the above scheme, the lifting block descends, the first spring is squeezed and deformed to generate a restoring force, and after the pressure plate is separated from the workpiece, the first spring returns to its original state, driving the lifting block to partially extend out of the support seat, thereby driving the workpiece to move upward relative to the support seat.

[0014] As a preferred embodiment, the transverse demolding structure includes a receiving groove recessed on the side wall of the support near the waste material and an airbag provided in the receiving groove that causes the side plate to elastically deform away from the support when expanding and to detach from the side plate and be housed in the receiving groove when contracting. The contraction or expansion of the airbag is controlled by the lifting and lowering of the lifting block.

[0015] Using the above scheme, when the lifting block descends, it drives the airbag to inflate. After inflating, the airbag elastically abuts against the side plate of the workpiece, causing the side plate to undergo slight elastic deformation in the direction away from the support seat, ensuring that the side plate can detach from the support seat. Conversely, when the lifting block rises, it drives the airbag to contract, causing the airbag to detach from the side plate and be stored in the receiving groove. After the resistance from the airbag on the side plate disappears, the side plate returns to its original shape near the support seat. Since the airbag is already stored in the receiving groove, it will no longer generate resistance to the rise of the side plate, and it can also protect the airbag from being scratched by the rising side plate.

[0016] Preferably, the support base is provided with an air passage that connects the airbag to the bottom of the lifting groove, and the lifting block is sealed and lifted within the lifting groove.

[0017] Using the above scheme, when the lifting block descends, the air in the lifting groove is squeezed into the airbag through the air channel, causing the airbag to inflate; when the lifting block rises, the air in the airbag is drawn into the lifting groove through the air channel, causing the airbag to contract.

[0018] Preferably, at least one set of lifting block, lifting groove, first spring and air passage is provided at intervals on the support base.

[0019] Using the above scheme, setting up one or more sets can achieve longitudinal demolding of the workpiece and inflation / deflation of the airbags.

[0020] Preferably, a second spring is provided between the upper mold base and the pressure plate. The minimum elastic force of the second spring is greater than the sum of the elastic force of the first spring and the normal pressure in the lifting groove when the workpiece is clamped between the pressure plate and the support base.

[0021] By adopting the above scheme, it is ensured that the second spring will not be compressed before the pressure plate drives the workpiece down to fit against the support seat. This ensures that during the mold closing process of the upper and lower mold seats, the pressure plate first cooperates with the support seat to clamp and position the workpiece. Then, when the upper mold seat continues to descend, the second spring is compressed to generate elastic force, ensuring the mold closing continues and driving the cutter to move closer to the support seat to cut the waste material at the end of the side plate.

[0022] This utility model, by adopting the above technical solution, has significant technical effects: the workpiece is placed on the support base and overlaps with the lifting block. During the mold closing process, the upper mold base and the pressure plate descend simultaneously until the pressure plate clamps and positions the workpiece with the support base. During this process, the lifting block descends elastically and is housed in the lifting groove, while simultaneously pressing the air in the lifting groove into the airbag, causing the airbag to expand and elastically abut against the side plate. Subsequently, the upper mold base continues to descend, driving the cutter to move closer to the support base and cut the waste material at the end of the side plate. When the mold opens, the upper mold base rises first, driving the cutter to move away from the side plate. After the cutter leaves the side plate, the airbag automatically drives the side plate to undergo elastic deformation away from the support base, ensuring that the side plate leaves the support base. Subsequently, the upper mold base and the pressure plate rise synchronously. After the pressure plate leaves the workpiece, the lifting block rises, driving the workpiece to move upward relative to the support base, completing the longitudinal demolding. The workpiece automatically completes demolding during the mold opening process without the need for worker assistance, making demolding convenient. Attached Figure Description

[0023] Figure 1 This is an exploded view of a mold structure for side trimming in one embodiment;

[0024] Figure 2 yes Figure 1 Enlarged view of point A in the image;

[0025] Figure 3 yes Figure 1 Enlarged view of point B in the image;

[0026] Figure 4 This is a front view of a mold structure with side trimming in one embodiment when the mold is closed;

[0027] Figure 5 yes Figure 4 Sectional view at point C;

[0028] Figure 6 yes Figure 5 Enlarged view of point D in the image;

[0029] Figure 7 This is a half-sectional schematic diagram of a mold structure for side trimming in one embodiment, showing the workpiece being opened until the cutting tool is far away from the workpiece and the pressure plate is still engaged with the support to clamp the workpiece.

[0030] Figure 8 yes Figure 7 Enlarged view of point E in the image;

[0031] Figure 9 This is a half-sectional schematic diagram of a mold structure for side trimming in one embodiment, from the mold opening to the separation of the pressure plate from the workpiece.

[0032] Figure 10 yes Figure 9 Enlarged view of point F in the image.

[0033] The parts referred to by the numbers in the above attached figures are as follows: 1. Upper mold base; 2. Lower mold base; 3. Pressure plate; 4. Support base; 5. Cutting tool; 6. Lifting block; 7. Lifting groove; 8. First spring; 9. Receiving groove; 10. Airbag; 11. Air passage; 12. Second spring; 13. Workpiece; 14. Side plate; 15. Scrap material. Detailed Implementation

[0034] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0035] Example

[0036] A mold structure for side trimming, as shown in the reference. Figures 1 to 10 The mold assembly includes an upper mold base 1 and a lower mold base 2. A pressure plate 3, parallel to the upper mold base 1, is mounted on the side of the upper mold base 1 closest to the lower mold base 2. A second spring 12, fixedly connected at both ends to the pressure plate 3 and the upper mold base 1 (in this embodiment, the second spring 12 is a nitrogen spring), is mounted on the lower mold base 2. A support base 4 for placing a workpiece 13 is fixedly mounted on the lower mold base 2, and a cutting tool 5, which can move horizontally towards or away from the support base 4, is mounted on the lower mold base 2. During mold closing, the pressure plate 3 first engages with the support base 4 to clamp the workpiece 13. The upper mold base 1 then continues to descend to close the mold, driving the cutting tool 5 to move closer to the support base 4 to remove the waste material 15 from the side plate 14. Conversely, the upper mold base 1 first rises relative to the pressure plate 3, causing the cutting tool 5 to move away from the side plate 14 until it disengages from the side plate 14. Subsequently, the upper mold base 1 and the pressure plate 3 rise synchronously. A drive structure is provided between the upper die base 1, the lower die base 2 and the cutter 5, which can drive the cutter 5 to move horizontally and reciprocally when the pressure plate 3 and the support base 4 cooperate to clamp the workpiece 13 and the upper die base 1 moves up and down relative to the pressure plate 3. The specific drive structure can be referred to the content described in the patent text involved in the background art. This application has not made any improvements to this, so it will not be described again.

[0037] The upper surface of the support base 4 is recessed with a lifting groove 7. A lifting block 6 is sealed and lifted within the lifting groove 7. A first spring 8 is provided between the bottom of the lifting groove 7 and the lifting block 6 along the lifting direction of the lifting block 6. The two ends of the first spring 8 are fixedly connected to the bottom of the lifting groove 7 and the side of the lifting block 6 away from the workpiece 13, respectively. In this embodiment, the first spring 8 is a metal spring. A receiving groove 9 is recessed on the side wall of the support base 4 near the waste material 15. An airbag 10 is fixedly installed within the receiving groove 9. When the airbag 10 inflates, it can partially extend out of the receiving groove 9, and when it contracts, it is completely contained within the receiving groove 9. An air passage 11 is provided inside the support base 4, with both ends communicating with the bottom of the lifting groove 7 and the airbag 10, respectively.

[0038] When the first spring 8 is in its initial state, the lifting block 6 partially extends out of the lifting groove 7 and the airbag 10 retracts and is stored in the receiving groove 9. The minimum elastic force of the second spring 12 is much greater than the sum of the elastic force of the first spring 8 and the normal pressure in the lifting groove 7 when the workpiece 13 is clamped between the pressure plate 3 and the support base 4.

[0039] The lifting block 6, the lifting groove 7, the first spring 8 and the air passage 11 are arranged at least one set on the support base 4 at intervals. In this embodiment, only one set is provided.

[0040] Workpiece 13 is placed on support base 4 and overlaps with lifting block 6. During the mold closing process, upper mold base 1 and pressure plate 3 descend simultaneously. Pressure plate 3 is in contact with workpiece 13 and drives workpiece 13 to descend synchronously until workpiece 13 is in contact with support base 4. At this time, pressure plate 3 and support base 4 clamp and position workpiece 13. During the above process, lifting block 6 is compressed by workpiece 13 and elastically descends and is stored in lifting groove 7. At the same time, the air in lifting groove 7 is pressed into airbag 10, causing airbag 10 to expand and elastically abut against side plate 14. Then, upper mold base 1 continues to descend relative to pressure plate 3, driving cutter 5 to move close to support base 4 to cut waste material 15 at the end of side plate 14.

[0041] When the mold is opened, under the action of the second spring 12, the upper mold base 1 rises relative to the pressure plate 3, driving the cutter 5 to move away from the side plate 14. After the cutter 5 leaves the side plate 14, the expanded airbag 10 automatically drives the side plate 14 to undergo elastic deformation away from the support base 4, ensuring that the side plate 14 leaves the support base 4 and completing the transverse demolding. Subsequently, the upper mold base 1 and the pressure plate 3 rise synchronously. After the pressure plate 3 leaves the workpiece 13, the lifting block 6 rises and drives the workpiece 13 to move upward relative to the support base 4. At the same time, the air in the airbag 10 is drawn into the lifting groove 7, causing the airbag 10 to contract and separate from the side plate 14 and be completely stored in the receiving groove 9, completing the longitudinal demolding of the workpiece 13.

[0042] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A mold structure for side trimming, comprising an upper mold base (1) and a lower mold base (2), wherein a pressure plate (3) is elastically and vertically mounted on the bottom of the upper mold base (1), and a support seat (4) is fixedly mounted on the lower mold base (2) to cooperate with the pressure plate (3) to clamp the workpiece (13) when the mold is closed, and a cutting tool (5) is mounted on the lower mold base (2) to horizontally move and cut off the waste material (15) on the side plate (14) of the workpiece (13) when the pressure plate (3) and the support seat (4) clamp the workpiece (13) and the upper mold base (1) and the lower mold base (2) continue to close the mold, and when the upper mold base (1) and the lower mold base (2) open the mold and the upper mold base (1) and the lower mold base (2) still clamp the workpiece (13), the cutting tool (5) moves horizontally away from the workpiece (13), characterized in that: A transverse demolding structure is provided on the side wall of the support base (4) near the waste material (15) to drive the side plate (14) of the workpiece (13) away from the support base (4) and elastically deform to disengage from the support base (4) when the tool (5) disengages from the workpiece (13). A longitudinal demolding structure is provided on the upper end surface of the support base (4) to drive the workpiece (13) to move upward relative to the support base (4) when the pressure plate (3) disengages from the support base (4).

2. The mold structure for side trimming according to claim 1, characterized in that: The longitudinal demolding structure includes a lifting block (6) that is elastically raised and lowered on the upper end face of the support base (4). When the pressure plate (3) and the support base (4) clamp the workpiece (13), the lifting block (6) elastically retracts into the support base (4) and extends elastically to drive the workpiece (13) to move upward relative to the support base (4) for demolding when the resistance from the pressure plate (3) on the workpiece (13) disappears.

3. The mold structure for side trimming according to claim 2, characterized in that: The upper end face of the support base (4) is recessed with a lifting groove (7) for the lifting block (6) to lift. A first spring (8) is provided between the lifting groove (7) and the lifting block (6) along the lifting direction of the lifting block (6) under normal conditions, which drives the lifting block (6) to partially extend out of the support base (4).

4. The mold structure for side trimming according to claim 3, characterized in that: The transverse demolding structure includes a receiving groove (9) recessed on the side wall of the support base (4) near the waste material (15) and an airbag (10) provided in the receiving groove (9) that causes the side plate (14) to elastically deform away from the support base (4) when expanding and to separate from the side plate (14) and be housed in the receiving groove (9) when contracting. The contraction or expansion of the airbag (10) is controlled by the lifting block (6).

5. The mold structure for side trimming according to claim 4, characterized in that: The support base (4) is provided with an air passage (11) that connects the airbag (10) with the bottom of the lifting groove (7), and the lifting block (6) is sealed and lifted in the lifting groove (7).

6. The mold structure for side trimming according to claim 5, characterized in that: At least one set of lifting block (6), lifting groove (7), first spring (8) and air passage (11) are provided at intervals on the support base (4).

7. The mold structure for side trimming according to claim 5, characterized in that: A second spring (12) is provided between the upper mold base (1) and the pressure plate (3). The minimum elastic force of the second spring (12) is greater than the sum of the elastic force of the first spring (8) and the normal pressure in the lifting groove (7) when the workpiece (13) is clamped between the pressure plate (3) and the support base (4).

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