Forming punching die for automobile wheel cover
By designing a car wheel cover forming punching mold with multiple cylinders and push rods, the problems of poor mold stability and low molding effect are solved, and an efficient and stable forming process and high-quality products are achieved.
Patent Information
- Application Number
- CN202421214210.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-30
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2034-05-30
AI Technical Summary
The existing die-cutting devices have poor stability during sliding on the mold, which is prone to deviation, resulting in scratches and wear, affecting the molding quality, and cannot be heat-insulating and cooling, reducing the molding effect.
A molding punching mold for automobile wheel cover is designed, using the cooperation of multiple sets of cylinders and push rods to form up and down movements of the upper and lower mold cores, and a punching mechanism and insulation components are set to ensure the stability and molding effect of the mold.
Through improved mold design, the stability and molding efficiency of the mold are improved, scratches and wear are avoided, high-quality molding of the product is ensured, and production efficiency is improved through thermal insulation components.
Smart Images

Figure CN222429013U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile wheel cover molds, in particular to a forming and punching mold for automobile wheel covers. Background Art
[0002] The punching device uses a tool to process the material of the workpiece by punching. If the tool is replaced by a die, the punching device is called a die-cutting device. Die-cutting is conducive to the production of large quantities of products of the same size. In the structure of the existing die-cutting device, the upper die and the lower die are in an upward and downward movable manner. That is, during die-cutting, the upper die and the lower die move up and down relative to each other. In the workpiece processing and punching process, the workpiece needs to be punched and formed.
[0003] After searching, the patent application number is (202021537457.3), which discloses "a battery cover forming and punching integrated mold", which solves the problem that the temperature in the mold cannot be intuitively obtained during production, and too high or too low temperature will affect product quality;
[0004] However, the above device has the following problems: the stability is poor during the sliding process on the mold, and it is easy to deviate, which may cause scratches and wear, affecting the molding quality, and the mold cannot be insulated and cooled, which greatly reduces the molding effect. For this reason, we propose a molding and punching mold for automobile wheel cover to solve the above problems. Utility Model Content
[0005] The purpose of the utility model is to provide a forming and punching die for automobile wheel covers, so as to solve the problems proposed in the above-mentioned background technology that the stability of the die during sliding is poor, scratches and wear may occur, thus affecting the forming quality, and the die cannot be insulated and cooled, which greatly reduces the forming effect.
[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a forming and punching die for automobile wheel covers, comprising a lower die frame, the upper end of the lower die frame is movably connected to an upper die frame, the lower die frame is fixedly connected to the lower die frame, the upper die frame is fixedly connected to the upper die frame, the upper surface of the lower die frame is fixedly connected to the lower die core, the lower surface of the upper die frame is fixedly connected to the upper die core, a pushing mechanism is arranged on the outer side of the lower die frame and the upper die frame, a punching mechanism is arranged between the lower die frame and the upper die frame, a heat preservation component is arranged on the outer side of the lower die core and the upper die core, and the pushing mechanism It includes a lower cylinder, a first connecting block, a lower pneumatic push rod, a second connecting block, an upper cylinder, a third connecting block, an upper pneumatic push rod and a fourth connecting block. The lower cylinder is arranged on the front and rear sides of the lower mold frame, the first connecting block is arranged on the upper end of the lower cylinder, the lower pneumatic push rod is arranged on the surrounding surface of the lower mold frame, the second connecting block is arranged on the upper end of the lower pneumatic push rod, the upper cylinder is arranged on the front and rear sides of the upper mold frame, the third connecting block is arranged on the lower end of the upper cylinder, the upper pneumatic push rod is arranged on the surrounding surface of the upper mold frame, and the fourth connecting block is arranged on the lower end of the upper pneumatic push rod.
[0007] Preferably, the punching mechanism includes a pushing cylinder, a fifth connecting block, a connecting plate, a limiting groove and a lifting cylinder. Two groups of pushing cylinders are fixedly installed on the left and right sides of the lower mold frame. The pushing cylinders are cross-installed on the surface of the lower mold frame. The end of the pushing cylinder is fixedly connected with the fifth connecting block. The lower end of the fifth connecting block is fixedly connected with a connecting plate. The surface of the connecting plate has a limiting groove. Four groups of lifting cylinders are fixedly installed at the four corners of the lower mold frame. Four groups of connecting rods are fixedly connected at the four corners of the upper mold frame. The lifting cylinders pass through the connecting plates and are inserted in the connecting rods. The lower mold frame is movably connected to the upper mold frame through the lifting cylinders.
[0008] Preferably, the lower cylinder is fixedly installed on both sides of the front and rear surfaces of the lower mold frame, the lower end of the first connecting block is fixedly connected to the lower cylinder, the inner side of the first connecting block is fixedly connected to the lower mold core, the lower pneumatic push rod is fixedly connected to the four sides of the lower mold frame, the lower end of the second connecting block is fixedly connected to the lower pneumatic push rod, the inner side of the lower pneumatic push rod is fixedly connected to the lower mold core, the inner side of the upper cylinder is fixedly connected to the upper mold frame, the upper end of the third connecting block is fixedly connected to the upper cylinder, the inner side of the third connecting block is fixedly connected to the upper mold core, the upper pneumatic push rod is fixedly installed on the four sides of the upper mold frame, the upper end of the fourth connecting block is fixedly connected to the upper pneumatic push rod, and the inner side of the fourth connecting block is fixedly connected to the upper mold core.
[0009] Preferably, the insulation component includes a baffle, an annular tube and a joint, the lower side of the lower mold core and the upper side of the upper mold core are fixedly connected with baffles at equal distances, an annular tube is fixedly connected inside the baffle, the end of the annular tube is fixedly connected with a joint, and the annular tube fits the lower mold core and the upper mold core.
[0010] Preferably, positioning rods are fixedly connected at equal distances at the edge of the surface of the lower mold frame, and positioning grooves are opened at the lower edge of the upper mold frame, and the diameter of the positioning grooves is adapted to the positioning rods, four groups of upper guide plates are fixedly connected to the four inner corners of the upper mold frame, and four groups of lower guide plates are fixedly connected to the four inner corners of the lower mold frame, and the upper guide plates and lower guide plates are staggered with each other.
[0011] Preferably, two groups of connecting columns are fixedly connected to the left and right sides of the lower mold frame respectively, a chain is fixedly connected to the surface of the connecting column, and the other end of the chain is fixedly connected to the lifting cylinder.
[0012] Preferably, the four corners of the lower mold frame and the upper mold frame are fixedly connected with hanging rings, the hanging rings are I-shaped, and the cross-section of the end of the hanging ring is an isosceles trapezoid.
[0013] Compared with the prior art, the beneficial effects of the utility model are:
[0014] 1. The utility model adopts the structural design of the pushing mechanism, the cooperation of multiple groups of lower cylinders and upper cylinders, and the setting of lower pneumatic push rods and upper pneumatic push rods to form the up and down movement of the lower mold core and the upper mold core. The two movements are interrelated and linked to each other, so that the production process of the entire product is stable, the molding efficiency of the product is improved, and the molding effect of the product is guaranteed.
[0015] 2. The utility model sets a punching mechanism. When the cylinder pushes the connecting plate through the fifth connecting block, the lifting cylinder drives the upper mold frame to move downward, punches the materials in the lower mold core and the upper mold core, and produces products that meet the requirements. After punching, the product has no edge shrinkage.
[0016] 3. The utility model adopts the setting of a heat preservation component, in which an annular tube is provided on the outer periphery of the upper mold core and the lower mold core, so as to perform heat preservation or cooling while forming, thereby improving production efficiency. The annular tube is connected by a joint to adjust the flow direction, and the annular tube is arranged along the lower mold core and the upper mold core to reduce the manufacturing cost of the annular tube. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0018] Figure 1 It is a schematic diagram of the structure of the utility model;
[0019] Figure 2 It is a structural schematic diagram of the lower die core of the utility model;
[0020] Figure 3 It is a structural schematic diagram of the upper mold core of the utility model;
[0021] Figure 4 It is a structural schematic diagram of the driving mechanism of the utility model;
[0022] Figure 5 It is a structural schematic diagram of the thermal insulation component of the utility model;
[0023] Figure 6 It is a left side schematic diagram of the structure of the utility model;
[0024] Figure 7 For this utility model Figure 2 A is a partial enlarged schematic diagram of the middle part.
[0025] In the figure: 1. lower mold frame; 2. upper mold frame; 3. lower mold frame; 4. upper mold frame; 5. lower mold core; 6. upper mold core; 7. pushing mechanism; 701. lower cylinder; 702. first connecting block; 703. lower pneumatic push rod; 704. second connecting block; 705. upper cylinder; 706. third connecting block; 707. upper pneumatic push rod; 708. fourth connecting block; 8. punching mechanism; 801. pushing cylinder; 802. fifth connecting block; 803. connecting plate; 804. limiting groove; 805. lifting cylinder; 9. insulation component; 901. baffle; 902. annular tube; 903. joint; 10. connecting rod; 11. positioning rod; 12. positioning groove; 13. upper guide plate; 14. lower guide plate; 15. connecting column; 16. chain; 17. lifting ring. DETAILED DESCRIPTION
[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0027] See also Figure 1-7The utility model provides an embodiment: a forming and punching die for a car wheel cover, comprising a lower die frame 1, an upper die frame 2 is movably connected to the upper end of the lower die frame 1, a lower die frame 3 is fixedly connected inside the lower die frame 1, an upper die frame 4 is fixedly connected inside the upper die frame 2, a lower die core 5 is fixedly connected to the upper surface of the lower die frame 3, an upper die core 6 is fixedly connected to the lower surface of the upper die frame 4, a pushing mechanism 7 is arranged on the outer side of the lower die frame 3 and the upper die frame 4, a punching mechanism 8 is arranged between the lower die frame 1 and the upper die frame 2, a heat preservation component 9 is arranged on the outer side of the lower die core 5 and the upper die core 6, and the pushing mechanism 7 comprises a lower cylinder 701, a first connecting block 702, and a lower pneumatic push rod 703. , a second connecting block 704, an upper cylinder 705, a third connecting block 706, an upper pneumatic push rod 707 and a fourth connecting block 708, a lower cylinder 701 is provided on the front and rear sides of the lower mold frame 3, a first connecting block 702 is provided on the upper end of the lower cylinder 701, a lower pneumatic push rod 703 is provided on the surrounding surface of the lower mold frame 3, a second connecting block 704 is provided on the upper end of the lower pneumatic push rod 703, an upper cylinder 705 is provided on the front and rear sides of the upper mold frame 4, a third connecting block 706 is provided on the lower end of the upper cylinder 705, an upper pneumatic push rod 707 is provided on the surrounding surface of the upper mold frame 4, and a fourth connecting block 708 is provided on the lower end of the upper pneumatic push rod 707;
[0028] The device solves the problem that the stability of the mold is poor during sliding, scratches and wear may occur, the molding quality is affected, and the molding effect is greatly reduced by setting the pushing mechanism 7 and the punching mechanism 8.
[0029] Furthermore, the punching mechanism 8 includes a pushing cylinder 801, a fifth connecting block 802, a connecting plate 803, a limiting groove 804 and a lifting cylinder 805. Two groups of pushing cylinders 801 are fixedly installed on the left and right sides of the lower mold frame 1. The pushing cylinders 801 are cross-installed on the surface of the lower mold frame 1. The ends of the pushing cylinders 801 are fixedly connected with the fifth connecting block 802. The lower end of the fifth connecting block 802 is fixedly connected with the connecting plate 803. The surface of the connecting plate 803 is provided with a limiting groove 804. Four groups of lifting cylinders 805 are fixedly installed at the four corners of the lower mold frame 1. Four groups of connecting rods 10 are fixedly connected at the four corners of the upper mold frame 2. The lifting cylinders 805 pass through the connecting plates 803 and are inserted into the connecting rods 10. The lower mold frame 1 is movably connected to the upper mold frame 2 through the lifting cylinders 805. Figure 7 As shown, the structure is used to push the connecting plate 803 to move outward by pushing the cylinder 801, so that the lifting cylinder 805 drives the connecting rod 10 to descend to the limiting groove 804, and punches the materials in the lower die core 5 and the upper die core 6.
[0030] Further, the lower cylinder 701 is fixedly installed on both sides of the front and rear surfaces of the lower mold frame 3, the lower end of the first connecting block 702 is fixedly connected to the lower cylinder 701, the inner side of the first connecting block 702 is fixedly connected to the lower mold core 5, the lower pneumatic push rod 703 is fixedly connected to the four sides of the lower mold frame 3, the lower end of the second connecting block 704 is fixedly connected to the lower pneumatic push rod 703, the inner side of the lower pneumatic push rod 703 is fixedly connected to the lower mold core 5, the inner side of the upper cylinder 705 is fixedly connected to the upper mold frame 4, the upper end of the third connecting block 706 is fixedly connected to the upper cylinder 705, the inner side of the third connecting block 706 is fixedly connected to the upper mold core 6, the upper pneumatic push rod 707 is fixedly installed on the four sides of the upper mold frame 4, the upper end of the fourth connecting block 708 is fixedly connected to the upper pneumatic push rod 707, and the inner side of the fourth connecting block 708 is fixedly connected to the upper mold core 6. Figure 2 As shown, the structure is used to place the material on the surface of the lower mold core 5, start the lower cylinder 701 and the lower pneumatic push rod 703, and at the same time start the upper cylinder 705 and the upper pneumatic push rod 707 at the upper mold core 6, so as to fit the lower mold core 5 and the upper mold core 6 together to form the product.
[0031] Furthermore, the heat preservation assembly 9 includes a baffle 901, an annular tube 902 and a joint 903. The baffle 901 is fixedly connected to the lower side of the lower mold core 5 and the upper side of the upper mold core 6 at equal distances. The baffle 901 is fixedly connected to the annular tube 902. The end of the annular tube 902 is fixedly connected to the joint 903. The annular tube 902 is attached to the lower mold core 5 and the upper mold core 6. Figure 5 As shown, the structure is used to fit with the lower mold core 5 and the upper mold core 6 through the annular tube 902, and the liquid flows into the annular tube 902 from the joint 903 to insulate the products in the lower mold core 5 and the upper mold core 6, thereby improving the molding quality of the device.
[0032] Furthermore, positioning rods 11 are fixedly connected to the surface edge of the lower mold frame 3 at equal distances, and positioning grooves 12 are provided at the lower edge of the upper mold frame 4. The diameter of the positioning grooves 12 matches the positioning rods 11. Four groups of upper guide plates 13 are fixedly connected to the inner four corners of the upper mold frame 2, and four groups of lower guide plates 14 are fixedly connected to the inner four corners of the lower mold frame 1. The upper guide plates 13 and the lower guide plates 14 are staggered. Figure 6 As shown, this structure is used when the lower mold core 5 and the upper mold core 6 are fitted together. The positioning rod 11 at the lower mold frame 3 is first inserted into the positioning groove 12 to guide the upper mold frame 4. At the same time, the upper guide plates 13 and the lower guide plates 14 on both sides move alternately with each other to improve the stability of the device.
[0033] Furthermore, two groups of connecting columns 15 are fixedly connected to the left and right sides of the lower mold frame 1, and the surface of the connecting column 15 is fixedly connected to a chain 16, and the other end of the chain 16 is fixedly connected to the lifting cylinder 805. Figure 6As shown, the structure is used to connect the lifting cylinder 805 through the chain 16, and to limit the lifting cylinder 805 to a certain extent, so that the lifting cylinder 805 can be lifted and lowered stably, thereby improving the accuracy of the product.
[0034] Furthermore, the four corners of the lower mold frame 1 and the upper mold frame 2 are fixedly connected with a lifting ring 17, the lifting ring 17 is an I-shaped, and the cross section of the end of the lifting ring 17 is an isosceles trapezoid. Figure 6 As shown, the structure is used to fix the lower mold frame 1 and the upper mold frame 2 through the lifting ring 17 to facilitate transportation.
[0035] Working principle: When used, Figure 1 As shown, the material is placed between the lower die core 5 and the upper die core 6. Figure 2 and Figure 4 As shown, the lower cylinder 701 and the lower pneumatic push rod 703 are started, and the lower mold core 5 is driven to move upward through the first connecting block 702. The lower pneumatic push rod 703 pushes the lower mold core 5 to move upward through the second connecting block 704. At the same time, the upper cylinder 705 and the upper pneumatic push rod 707 at the upper mold frame 4 are started, and the upper cylinder 705 drives the third connecting block 706 to move the upper mold core 6 downward, and the upper pneumatic push rod 707 drives the fourth connecting block 708 to move the upper mold core 6 downward. At the same time, as shown in FIG. Figure 6 As shown, when the lower mold core 5 and the upper mold core 6 are fitted together, the positioning rod 11 at the lower mold frame 3 is first inserted into the positioning groove 12 to guide the upper mold frame 4. At the same time, the upper guide plates 13 and the lower guide plates 14 on both sides move alternately with each other to fit the lower mold core 5 and the upper mold core 6 together for shaping. After the shaping is completed, as shown in FIG. Figure 7 As shown, the push cylinder 801 is started to drive the fifth connecting block 802 to push the connecting plate 803 outward, so that the inner side of the end of the connecting plate 803 connected to the fifth connecting block 802 is in contact with the lifting cylinder 805, and the lifting cylinder 805 is started to drive the upper mold frame 2 to move downward through the connecting rod 10, so as to be in contact with the upper surface of the limiting groove 804, and the materials in the lower mold core 5 and the upper mold core 6 are punched and cut. Figure 5 As shown, the annular tube 902 is fitted with the lower mold core 5 and the upper mold core 6, and the liquid flows into the annular tube 902 from the joint 903, and the products in the lower mold core 5 and the upper mold core 6 are kept warm. Then the lower mold core 5 and the upper mold core 6 are restored to their original positions, and the products are taken out, so that the production process of the entire product is stable, the molding efficiency of the product is improved, and the molding effect of the product is guaranteed. The above is the entire working principle of the utility model.
[0036] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.
Claims
1. A forming and punching die for a car wheel cover, comprising a lower die frame (1), characterized in that: The upper end of the lower mold frame (1) is movably connected to the upper mold frame (2); the lower mold frame (1) is fixedly connected to the lower mold frame (3); the upper mold frame (2) is fixedly connected to the upper mold frame (4); the upper surface of the lower mold frame (3) is fixedly connected to the lower mold core (5); the lower surface of the upper mold frame (4) is fixedly connected to the upper mold core (6); a pushing mechanism (7) is provided on the outer sides of the lower mold frame (3) and the upper mold frame (4); a punching mechanism (8) is provided between the lower mold frame (1) and the upper mold frame (2); and a heat preservation component (9) is provided on the outer sides of the lower mold core (5) and the upper mold core (6). The pushing mechanism (7) comprises a lower cylinder (701), a first connecting block (702), a lower pneumatic push rod (703), a second connecting block (704), an upper cylinder (705), a third connecting block (706), an upper pneumatic push rod (707) and a fourth connecting block (708). The lower cylinder (701) is arranged at the front and rear sides of the lower mold frame (3). The upper end of the lower cylinder (701) is arranged at the first connecting block (702). The lower mold frame (3) A lower pneumatic push rod (703) is arranged on the surrounding surface of the upper mold frame (4), and a second connecting block (704) is arranged on the upper end of the lower pneumatic push rod (703). An upper cylinder (705) is arranged on the front and rear sides of the upper mold frame (4), and a third connecting block (706) is arranged on the lower end of the upper cylinder (705). An upper pneumatic push rod (707) is arranged on the surrounding surface of the upper mold frame (4), and a fourth connecting block (708) is arranged on the lower end of the upper pneumatic push rod (707).
2. The forming and punching die for automobile wheel cover according to claim 1, characterized in that: The punching mechanism (8) comprises a pushing cylinder (801), a fifth connecting block (802), a connecting plate (803), a limiting groove (804) and a lifting cylinder (805). Two groups of pushing cylinders (801) are fixedly installed on the left and right sides of the lower mold frame (1). The pushing cylinders (801) are cross-mounted on the surface of the lower mold frame (1). The fifth connecting block (802) is fixedly connected to the end of the pushing cylinder (801). The fifth connecting block (802) ) is fixedly connected to the lower end of the mold frame (1) with a connecting plate (803), a limiting groove (804) is provided on the surface of the connecting plate (803), four groups of lifting cylinders (805) are fixedly installed at the four corners of the lower mold frame (1), four groups of connecting rods (10) are fixedly connected to the four corners of the upper mold frame (2), the lifting cylinders (805) pass through the connecting plate (803) and are inserted into the connecting rods (10), and the lower mold frame (1) is movably connected to the upper mold frame (2) via the lifting cylinders (805).
3. The forming and punching die for automobile wheel cover according to claim 1, characterized in that: The lower cylinder (701) is fixedly mounted on both sides of the front and rear surfaces of the lower mold frame (3); the lower end of the first connecting block (702) is fixedly connected to the lower cylinder (701); the inner side of the first connecting block (702) is fixedly connected to the lower mold core (5); the lower pneumatic push rod (703) is fixedly connected to the four sides of the lower mold frame (3); the lower end of the second connecting block (704) is fixedly connected to the lower pneumatic push rod (703); the inner side of the lower pneumatic push rod (703) is fixedly connected to the lower mold core (5). The inner side of the upper cylinder (705) is fixedly connected to the upper mold frame (4); the upper end of the third connecting block (706) is fixedly connected to the upper cylinder (705); the inner side of the third connecting block (706) is fixedly connected to the upper mold core (6); the upper pneumatic push rod (707) is fixedly installed on the surrounding surface of the upper mold frame (4); the upper end of the fourth connecting block (708) is fixedly connected to the upper pneumatic push rod (707); and the inner side of the fourth connecting block (708) is fixedly connected to the upper mold core (6).
4. The forming and punching die for automobile wheel cover according to claim 1, characterized in that: The heat-insulating component (9) comprises a baffle (901), an annular tube (902) and a joint (903); the baffle (901) is fixedly connected to the lower side of the lower mold core (5) and the upper side of the upper mold core (6) at equal distances; the annular tube (902) is fixedly connected inside the baffle (901); the end of the annular tube (902) is fixedly connected to the joint (903); and the annular tube (902) fits the lower mold core (5) and the upper mold core (6).
5. The forming and punching die for automobile wheel cover according to claim 1, characterized in that: Positioning rods (11) are fixedly connected at equal distances on the surface edge of the lower mold frame (3); a positioning groove (12) is provided on the lower side edge of the upper mold frame (4); the diameter of the positioning groove (12) is matched with the positioning rod (11); four groups of upper guide plates (13) are fixedly connected to the inner four corners of the upper mold frame (2); four groups of lower guide plates (14) are fixedly connected to the inner four corners of the lower mold frame (1); the upper guide plates (13) and the lower guide plates (14) are staggered with each other.
6. The forming and punching die for automobile wheel cover according to claim 1, characterized in that: Two groups of connecting columns (15) are fixedly connected to the left and right sides of the lower mold frame (1), respectively; a chain (16) is fixedly connected to the surface of the connecting column (15); and the other end of the chain (16) is fixedly connected to the lifting cylinder (805).
7. The forming and punching die for automobile wheel cover according to claim 1, characterized in that: The four corners of the lower mold frame (1) and the upper mold frame (2) are fixedly connected with hanging rings (17), the hanging rings (17) are I-shaped, and the cross-section of the ends of the hanging rings (17) is an isosceles trapezoid.
Citation Information
Patent Citations
Battery cover forming and punching integrated die
CN212888579U