Flanging device and lower stripper plate

Abstract

The application relates to a flanging forming device and a lower stripping plate, which are suitable for demolding action on a cover with a vertical flange, the vertical flange comprising a straight edge and an arc-shaped edge connected with the straight edge, and the body comprising a straight edge part and an arc edge part connected with the straight edge part around the circumferential part of the first through hole. The first plate surface of the straight edge part is provided with an avoiding groove corresponding to the straight edge, and the first plate surface of the arc edge part is used for abutting against the arc-shaped edge. When the demolding action is performed on the cover, the avoiding groove is arranged corresponding to the straight edge, that is, the straight edge part avoids the straight edge through the avoiding groove and does not contact the straight edge, so that the straight edge is not subjected to the upward thrust of the lower stripping plate, thereby avoiding the outward rolling of the straight edge and improving the product yield. Meanwhile, the arc edge part abuts against the arc-shaped edge, the first plate surface of the arc edge part acts on the arc-shaped edge which has relatively large structural strength and is not prone to outward rolling, and the cover is smoothly separated from the lower die plate, thereby ensuring the demolding efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of flanging forming, in particular to a flanging forming device and a lower stripping plate. Background Art

[0002] Electrical accessories, such as gas water heater covers, electric water heater covers, range hood covers, remote control covers, etc., all involve the demolding step of removing the molded product from the mold during the integrated die-casting production process. The selection of demolding tools, appropriate demolding force, and appropriate demolding speed can all affect the product quality of the molded product.

[0003] See also Figure 1 and Figure 2 For a lid with a vertical flange and a waist-shaped opening enclosed by the vertical flange, the production and molding steps generally include: placing the lid with a horizontal flange on the lower template of the lower mold base, and clamping and fixing it by the upper clamping plate and the lower clamping plate, so that the inner area of ​​the horizontal flange close to the central axis of the lid is aligned and abuts against the lower template, and the remaining area of ​​the horizontal flange is suspended (that is, protruding from the lower template); then the upper mold base descends, so that the horizontal flange of the lid is press-formed by the upper template and the lower template, specifically, the outer part of the horizontal flange (that is, the part protruding from the lower template) is flipped and bent to form a vertical flange perpendicular to the horizontal flange; then, the upper mold base ascends and resets, and ascends through the lower stripping plate located below the lower template, and the ascending lower stripping plate applies a thrust to the vertical flange to push the lid out of the lower template. However, in the process of pushing the lid upward by the lower stripping plate, especially when the demoulding speed is slightly increased, the vertical flange is easily subjected to the force during demoulding and curls outward, resulting in a high product defect rate. Summary of the Invention

[0004] The first technical problem solved by the present invention is to provide a flanging forming device, which can effectively avoid the outward curling phenomenon during demoulding and improve the product yield.

[0005] The second technical problem solved by the present invention is to provide a lower stripping plate, which can effectively avoid the outer curling phenomenon during demoulding and improve the product yield.

[0006] The first technical problem mentioned above is solved by the following technical solution:

[0007] The utility model provides a lower stripping plate, be suitable for the demolding action of the cover with vertical flanging, the vertical flanging includes straight edge and the arc edge connected with the straight edge, the lower stripping plate includes the body, the body includes the first board surface and the second board surface who sets up oppositely, and is formed with the first through -hole who passes through the first board surface with the second board surface, the first board surface is used for abutting with the vertical flanging, the first through -hole is used for adapting to the shape of the lower mould plate, the body is set through the first through -hole on the lower mould plate outside, and can slide up and down relative to the lower mould plate along the axial direction of the first through -hole, the body is around the peripheral part of the first through -hole including straight edge part and the arc edge part connected with the straight edge part, the first board surface of straight edge part is equipped with the avoidance slot for corresponding arrangement with the straight edge, and the first board surface of arc edge part is used for corresponding abutment with the arc edge.

[0008] The lower stripping plate has the beneficial effects compared with the prior art:

[0009] When the lower stripping plate performs the demolding action on the cover, the avoidance slot is arranged corresponding to the straight edge, that is, the straight edge part avoids the straight edge through the avoidance slot and does not contact the straight edge, so that the straight edge is not subjected to the upward thrust of the first board surface, thereby avoiding the outward rolling of the straight edge and improving the product yield; at the same time, the arc edge part abuts corresponding to the arc edge, the first board surface of the arc edge part acts on the arc edge which has relatively large structural strength and is not easy to roll outward, and the cover is smoothly separated from the lower mould plate, thereby ensuring the demolding efficiency.

[0010] In one embodiment, the avoidance slot is two, the two avoidance slots are oppositely arranged and one-to-one corresponding to the two straight edges of the vertical flanging; the arc edge part is two, the two arc edge parts are oppositely arranged and one-to-one corresponding to the two arc edges of the vertical flanging. Thus, when the lower stripping plate performs the demolding action on the cover with the vertical flanging, the two avoidance slots can respectively avoid the two straight edges and do not contact the straight edges, so that the straight edges are not subjected to the upward thrust of the first board surface, thereby avoiding the outward rolling of the straight edges and improving the product yield; in addition, the two arc edge parts respectively abut corresponding to the two arc edges in synchronization, the two arc edge parts simultaneously act on the two arc edges which have relatively large structural strength and are not easy to roll outward, thereby enabling the cover to smoothly move upward and thereby separate from the lower mould plate, thereby ensuring the demolding efficiency.

[0011] In one embodiment, a transition groove is further provided on the first plate surface of the straight edge portion and / or the arcuate edge portion; the transition groove is connected to the avoidance groove, with one end of the bottom wall of the transition groove connected to the first plate surface of the arcuate edge portion, and the other end of the bottom wall of the transition groove extending obliquely relative to the first plate surface into the avoidance groove. In this manner, the avoidance groove transitions to the first plate surface of the arcuate edge portion through the transition groove, and the bottom wall of the transition groove serves as a transition, thereby improving demolding quality.

[0012] In one embodiment, the inclination angle of the bottom wall of the transition groove relative to the first plate surface is defined as a, and a is between 5° and 30°. Thus, when the inclination angle a of the bottom wall of the transition groove relative to the first plate surface is selected to be between 5° and 30°, the bottom wall of the transition groove performs a better transition function, making it less likely that the product will curl outward after demolding, thereby improving product quality.

[0013] In one embodiment, a is 10° to 15°.

[0014] In one embodiment, the sum of the lengths of the avoidance groove and the transition grooves at its ends is equal to the length of the straight edge. Thus, the avoidance groove and its transition grooves are both located on the straight edge. In other words, one transition groove's end distal from the avoidance groove corresponds to one end of the straight edge, and the other transition groove's end distal from the avoidance groove corresponds to the other end of the straight edge. This allows the first plate surface of the curved edge to abut against the curved edge as much as possible during demolding. This provides greater structural strength and prevents deformation, thereby ensuring better demolding quality.

[0015] In one embodiment, the avoidance groove extends from one end of the straight edge portion to the other end of the straight edge portion, and the transition groove is provided on the first plate surface of the arc edge portion. Thus, the length of the avoidance groove is equal to the length of the straight edge portion. Thus, for a straight edge portion having a mounting hole at its end, the avoidance groove prevents the straight edge portion from transmitting thrust to the straight edge portion during demolding, preventing deformation of the mounting hole at the end of the straight edge portion, thereby ensuring good demolding quality.

[0016] In one embodiment, the depth of the avoidance groove is defined as S, where S ≥ 10 mm; the width of the avoidance groove is defined as W, where W ≥ 10 mm. Thus, when the depth of the avoidance groove S ≥ 10 mm, the design is more rational, and the portion of the straight edge corresponding to the avoidance groove is not subjected to the thrust of the straight edge, thereby ensuring better demolding quality. Furthermore, when the width of the avoidance groove W ≥ 10 mm, the design is more rational, ensuring that during demolding, the portion of the straight edge corresponding to the avoidance groove is located on the avoidance groove and does not contact the first plate surface of the straight edge, thereby avoiding the thrust of the straight edge and ensuring better demolding quality.

[0017] The second technical problem mentioned above is solved by the following technical solution:

[0018] A flanging forming device, which also includes a lower die base, an upper die base arranged opposite to the lower die base, and a pushing mechanism connected to the upper die base; the lower die base includes a lower template and the lower stripping plate; the lower stripping plate is sleeved on the outside of the lower template through the first through hole, and can slide up and down relative to the lower template along the axial direction of the first through hole; the upper die base includes an upper template, which is provided with a second through hole adapted to the lower template and is slidably sleeved on the outside of the lower template through the second through hole.

[0019] In the above-mentioned flanging forming device, when the cover is demolded, the avoidance groove is arranged in correspondence with the straight edge, that is, the straight edge avoids the straight edge through the avoidance groove and does not contact the straight edge, so that the straight edge will not be subjected to the upward thrust of the lower demolding plate, thereby avoiding the straight edge from curling outward, and improving the product yield; at the same time, the arc edge is in contact with the arc-shaped edge, and the first plate surface of the arc edge acts on the arc-shaped edge with relatively large structural strength and not easy to curl outward, so that the cover can be smoothly separated from the lower template, which can ensure the demolding efficiency.

[0020] In one embodiment, the lower mold base also includes a base and a guide mechanism, the lower template is fixedly arranged on the base, the lower stripping plate is guided and cooperated with the guide mechanism, and the upper template is guided and cooperated with the guide mechanism; the lower mold base also includes an elastic reset member, and the two ends of the elastic reset member respectively abut the base and the lower stripping plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic structural diagram of a cover according to an embodiment from one viewing angle;

[0024] Figure 2 for Figure 1 Another perspective structural diagram of the cover shown;

[0025] Figure 3 This is a structural schematic diagram of a lower stripping plate according to an embodiment;

[0026] Figure 4 A schematic structural diagram of an upper template during a molding process according to an embodiment;

[0027] Figure 5 for Figure 4 Schematic diagram of the cross-sectional structure at AA;

[0028] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at C;

[0029] Figure 7 for Figure 4 Schematic diagram of the cross-sectional structure at BB;

[0030] Figure 8 for Figure 7 Schematic diagram of the enlarged structure at D;

[0031] Figure 9 This is a structural diagram of an embodiment in which the lower stripping plate pushes the cover upwards out of the lower template;

[0032] Figure 10 for Figure 9 Schematic diagram of the cross-sectional structure at EE;

[0033] Figure 11 for Figure 10 Schematic diagram of the enlarged structure at G;

[0034] Figure 12 for Figure 9 Schematic diagram of the cross-sectional structure at FF;

[0035] Figure 13 for Figure 12 Schematic diagram of the enlarged structure at H.

[0036] Reference numerals:

[0037] 10. Lid; 11. Vertical flange; 111. Straight edge; 1111. First straight edge; 1112. Second straight edge; 1113. First mounting hole; 1114. Second mounting hole; 112. Arc-shaped edge; 12. Horizontal portion; 113. Cover hole; 20. Lower plate; 201. First plate surface; 202. Second plate surface; 203. First through hole; 21. Straight edge; 21a. First straight edge; 21b. Second straight edge; 211. Avoidance groove; 2111. First avoidance groove; 2112. Second avoidance groove; 22. Arc-shaped edge; 23. Transition groove; 231. First transition groove; 232. Second transition groove; 30. Lower template; 40. Upper template; 41. Second through hole. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0039] It should be noted that the "lower" in the lower peeling plate described in the text is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0040] See also Figure 1 and Figure 2 Traditionally, the horizontal flange of the lid 10 includes a vertical flange 11 and a horizontal portion 12 connected to the vertical flange 11 (that is, the area on the horizontal flange that is not bent) after stamping. In the process of pushing the lid 10 upward by the lower stripping plate 20, the lower template 30 has a strong vertical upward thrust on the horizontal portion 12. At the same time, the structural strength of the straight edge 111 of the vertical flange 11 is poor, so the straight edge 111 is easily rolled outward under the force during demoulding, that is, it is easy to cause bending, resulting in a high product defective rate; in addition, the structural strength of the curved edge 112 of the vertical flange 11 is relatively strong, and it is not easy to roll outward under the force during demoulding.

[0041] Based on this, see Figures 1 to 8 , an embodiment of the present invention provides a lower stripping plate 20, which is suitable for demolding a cover 10 having a vertical flange 11. The vertical flange 11 includes a straight edge 111 and an arc-shaped edge 112 connected to the straight edge 111. The lower stripping plate 20 includes a main body. The main body includes a first plate surface 201 and a second plate surface 202 that are relatively arranged, and a first through hole 203 that passes through the first plate surface 201 and the second plate surface 202. The first plate surface 201 is used to abut against the vertical flange 11. The first through hole 203 is used to adapt to the shape of the lower template 30. The main body is sleeved on the outside of the lower template 30 through the first through hole 203, and can be moved along the axial direction of the first through hole 203 (such as Figure 3 The main body (as indicated by arrow O) slides up and down relative to the lower template 30. The circumferential portion of the main body surrounding the first through hole 203 includes a straight edge portion 21 and an arcuate edge portion 22 connected to the straight edge portion 21. The first plate surface 201 of the straight edge portion 21 is provided with a relief groove 211 corresponding to the straight edge 111. The first plate surface 201 of the arcuate edge portion 22 is designed to abut the curved edge 112.

[0042] It should be noted that the corresponding arrangement of the avoidance groove 211 and the straight edge 111 means that, on the one hand, the avoidance groove 211 and the straight edge 111 correspond to each other in number, that is, when there is one straight edge 111, the avoidance groove 211 is correspondingly set to one, and when there are two or more straight edges 111, the avoidance groove 211 is correspondingly set to two or more; on the other hand, the avoidance groove 211 and the straight edge 111 correspond to each other in position, that is, during the demolding process, the avoidance groove 211 can avoid the straight edge 111 and does not contact the straight edge 111.

[0043] It should also be noted that the corresponding abutment between the plate surface of the arc edge portion 22 and the arc edge 112 means that, on the one hand, the arc edge portion 22 and the arc edge 112 correspond to each other in quantity, that is, when there is one arc edge 112, the arc edge portion 22 is correspondingly set to one, and when there are two or more arc edges 112, the arc edge portion 22 is correspondingly set to two or more; on the other hand, the arc edge portion 22 and the arc edge 112 correspond to each other in position, that is, during the demolding process, the arc edge portion 22 and the arc edge 112 abut against each other to provide power to achieve demolding.

[0044] See Figure 2 、 Figure 3 、 Figures 6 to 13 , when the cover 10 is demoulded by the lower stripping plate 20, the avoidance groove 211 is correspondingly provided with the straight edge 111, that is, the straight edge portion 21 avoids the straight edge 111 through the avoidance groove 211 and does not contact the straight edge 111, so that the straight edge 111 will not be pushed upward by the lower stripping plate 20, thereby avoiding the straight edge 111 from rolling outward, and improving the product yield; at the same time, the arc edge portion 22 abuts against the arc edge 112 correspondingly, and the first plate surface 201 of the arc edge portion 22 acts on the arc edge 112 with relatively large structural strength and not easy to roll outward, so that the cover 10 can be smoothly separated from the lower template 30 (such as Figure 11 and Figure 13 As shown), it can ensure demoulding efficiency.

[0045] It should be noted that the number of straight edges 111 and curved edges 112 of the vertical flange 11 can be more than one, for example, there can be two straight edges 111 and two curved edges 112 arranged alternately, or there can be three straight edges 111 and three curved edges 112 arranged alternately, and so on. In order to facilitate the description of the present invention and simplify the description, this embodiment specifically takes the example of two straight edges 111 and two curved edges 112 of the vertical flange 11 for specific introduction. At this time, the cover hole 113 enclosed by the vertical flange 11 is correspondingly a waist-shaped hole.

[0046] Please refer to Figure 3 、 Figure 6 and Figure 8In one embodiment, there are two avoidance grooves 211, which are arranged opposite to each other and correspond one-to-one with the two straight edges 111 of the vertical flange 11. There are two arcuate edges 22, which are arranged opposite to each other and correspond one-to-one with the two arcuate edges 112 of the vertical flange 11. In this way, when the lower stripping plate 20 demoulds the cover 10 with the vertical flange 11, the two avoidance grooves 211 can respectively avoid the two straight edges 111 and do not contact the straight edges 111. In this way, the straight edges 111 will not be subjected to the upward push of the first plate surface 201, thereby avoiding the straight edges 111 from curling outward, and improving the product yield; in addition, the two arc edge portions 22 respectively and synchronously abut against the two arc-shaped edges 112, and the two arc edge portions 22 simultaneously act on the two arc-shaped edges 112 with relatively large structural strength and not easy to curl outward, so that the cover 10 can move upward smoothly and thus separate from the lower template 30, thereby ensuring the demoulding efficiency.

[0047] See Figure 2 、 Figure 3 、 Figure 6 and Figure 8 In one embodiment, a transition groove 23 is further provided on the first plate surface 201 of the straight edge portion 21 (eg Figure 3 The two transition grooves 23 connected to the avoidance groove 211 at the lower side are shown, or the first plate surface 201 of the arc edge portion 22 is further provided with a transition groove 23 (as shown in FIG. Figure 3 The two transition grooves 23 shown are connected to the avoidance groove 211 in the upper portion. The transition grooves 23 are connected to the avoidance grooves 211. One end of the bottom wall of the transition grooves 23 is connected to the first plate surface 201 of the arc edge portion 22, and the other end of the bottom wall of the transition grooves 23 extends obliquely relative to the first plate surface 201 to the avoidance grooves 211. In this way, the avoidance grooves 211 transition to the first plate surface 201 of the arc edge portion 22 through the transition grooves 23. The bottom wall of the transition grooves 23 serves as a transition, which improves the demolding quality.

[0048] It can be understood that both ends of each avoidance groove 211 transition to the first plate surface 201 of the arc edge portion 22 through the transition groove 23. For example, when there are two avoidance grooves 211 and two arc edge portions 22, there are four transition grooves 23, and each of the two ends of each avoidance groove 211 is connected to a transition groove 23 (e.g., Figure 3 shown).

[0049] Of course, as an optional solution, the transition groove 23 may be omitted, and both ends of the avoidance groove 211 may be directly disposed adjacent to the arc edge portion 22 .

[0050] See Figure 2 、 Figure 3 、 Figure 6 and Figure 8In one embodiment, the inclination angle of the bottom wall of the transition groove 23 relative to the first plate surface 201 is defined as a, and a ranges from 5° to 30°. Thus, when the inclination angle a of the bottom wall of the transition groove 23 relative to the first plate surface 201 is selected from 5° to 30°, the bottom wall of the transition groove 23 provides a better transition effect, preventing the product from curling outward after demolding, thereby improving product quality. In one embodiment, a ranges from 10° to 15°.

[0051] See Figure 3 、 Figure 6 and Figure 8 In one embodiment, the avoidance groove 211 (e.g. Figure 3 The sum of the lengths of the lower side avoidance groove 211 and the transition grooves 23 at its ends is equal to the length of the straight edge 111. Thus, the avoidance groove 211 and its two transition grooves 23 are both located on the straight edge 21. In other words, the end of one transition groove 23 distal from the avoidance groove 211 corresponds to one end of the straight edge 21, and the end of the other transition groove 23 distal from the avoidance groove 211 corresponds to the other end of the straight edge 21. This allows the first plate surface 201 of the arcuate edge 22 to abut against the arcuate edge 112 as much as possible during demolding. This provides the arcuate edge 22 with greater structural strength and prevents deformation, thereby ensuring excellent demolding quality.

[0052] See Figure 3 、 Figure 6 and Figure 8 In one embodiment, the avoidance groove 211 (e.g. Figure 3 The illustrated upper portion of the avoidance groove 211 extends from one end of the straight edge portion 21 to the other end. The transition groove 23 is provided on the first plate surface 201 of the arcuate edge portion 22. As such, the avoidance groove 211 is equal in length to the straight edge portion 21. This prevents the straight edge portion 21 from transmitting thrust to the straight edge 111, which has mounting holes at its ends, during demolding. This prevents deformation of the mounting holes at the ends of the straight edge 111, thereby ensuring good demolding quality.

[0053] As an optional solution, the transition groove 23 is not limited to being provided on the straight edge portion 21 or the curved edge portion 22. The transition groove 23 can also be provided at the junction between the straight edge portion 21 and the curved edge portion 22. In other words, a portion of the transition groove 23 is provided at one end of the straight edge portion 21, and another portion of the transition groove 23 is provided on the curved edge portion 22.

[0054] See Figure 6In one embodiment, the depth of the avoidance groove 211 is defined as S, where S ≥ 10 mm; the width of the avoidance groove 211 is defined as W, where W ≥ 10 mm. Thus, when the depth S of the avoidance groove 211 is ≥ 10 mm, the design is more reasonable, and the portion of the straight edge 111 corresponding to the avoidance groove 211 will not be subject to the thrust of the straight edge portion 21, thereby ensuring better demolding quality. Furthermore, when the width W of the avoidance groove 211 is ≥ 10 mm, the design is more reasonable, ensuring that during the demolding process, the portion of the straight edge 111 corresponding to the avoidance groove 211 is located on the avoidance groove 211 and does not contact the first plate surface 201 of the straight edge portion 21, thereby avoiding the thrust of the straight edge portion 21, thereby ensuring better demolding quality.

[0055] It should be noted that when the depth S of the avoidance groove 211 reaches a limit value, that is, the avoidance groove 211 penetrates from the first plate surface 201 to the second plate surface 202 of the straight edge portion 21 .

[0056] Please refer to Figures 1 to 3In a specific embodiment, there are two straight side portions 21, which are arranged opposite to each other and correspond one-to-one with the two straight sides 111 of the vertical flange 11. There are two arcuate side portions 22, which are arranged opposite to each other and correspond one-to-one with the two arcuate sides 112 of the vertical flange 11. The two straight side portions 21 are respectively defined as a first straight side portion 21a and a second straight side portion 21b. The avoidance groove 211 provided on the first straight side portion 21a is defined as a first avoidance groove 2111, and the avoidance groove 211 provided on the second straight side portion 21b is defined as a second avoidance groove 2112. The transition grooves 23 at both ends of the first avoidance groove 2111 are both defined as first transition grooves 231, and the transition grooves 23 at both ends of the second avoidance groove 2112 are both defined as second transition grooves 232. The two straight sides 111 are respectively defined as a first straight side 1111 and a second straight side 1112. The first avoidance groove 2111 is provided corresponding to the first straight edge 1111, and the second avoidance groove 2112 is provided corresponding to the second straight edge 1112. The ends of the first straight edge 1111 are not provided with mounting holes, but the middle portion of the first straight edge 1111 is provided with at least one first mounting hole 1113, for example. Accordingly, the length of the first avoidance groove 2111 is defined as L1, the lengths of the two first transition grooves 231 at either end of the first avoidance groove 2111 are defined as L2 and L3, respectively, and the length of the first straight edge 21a is defined as L. The sum of L1, L2, and L3 is equal to L. In this way, the first avoidance groove 2111 and the first transition grooves 231 at both ends are disposed on the first straight edge 21a. In other words, one end of the first transition groove 231, which is distal to the first avoidance groove 2111, is disposed at one end of the first straight edge 21a, and the other end of the first transition groove 231, which is distal to the first avoidance groove 2111, is disposed at the other end of the first straight edge 21a. This allows the first plate surface 201 of the arcuate edge 22 to abut against the arcuate edge 112 as much as possible during demolding, providing greater structural strength and preventing deformation, thereby ensuring better demolding quality.

[0057] Furthermore, a second mounting hole 1114 is provided at the end of the second straight edge 1112. Accordingly, the length of the second avoidance groove 2112 is defined as L4, the lengths of the two second transition grooves 232 at either end of the second avoidance groove 2112 are defined as L5 and L6, respectively, and the length of the second straight edge 21b is defined as L, where L and L4 are equal. Thus, the length of the second avoidance groove 2112 is equal to the length of the second straight edge 21b. This prevents the second straight edge 21b from transmitting thrust to the second straight edge 1112 during demolding, preventing deformation of the second mounting hole 1114 at the end of the second straight edge 1112. This ensures excellent demolding quality.

[0058] See also Figure 2 、 Figure 3 、 Figure 6 and Figure 8 In one embodiment, a flanging forming device further includes a lower die base (not shown), an upper die base (not shown) disposed opposite the lower die base, and a pushing mechanism (not shown) connected to the upper die base. The lower die base includes a lower mold plate 30 and a lower stripping plate 20. The lower stripping plate 20 is sleeved on the outside of the lower mold plate 30 through a first through hole 203 and can slide up and down relative to the lower mold plate 30 along the axis of the first through hole 203. The upper die base includes an upper mold plate 40, which is provided with a second through hole 41 adapted to the lower mold plate 30 and is slidably sleeved on the outside of the lower mold plate 30 through the second through hole 41.

[0059] In the above-mentioned flanging forming device, when the cover 10 is demolded, the avoidance groove 211 is arranged corresponding to the straight edge 111, that is, the straight edge 21 avoids the straight edge 111 through the avoidance groove 211 and does not contact the straight edge 111, so that the straight edge 111 will not be subjected to the upward thrust of the lower stripping plate 20, thereby avoiding the straight edge 111 from curling outward, and improving the product yield; at the same time, the arc edge 22 is in contact with the arc-shaped edge 112, and the first plate surface 201 of the arc edge 22 acts on the arc-shaped edge 112, which has a relatively large structural strength and is not easy to curl outward, and enables the cover 10 to smoothly separate from the lower template 30, thereby ensuring the demolding efficiency.

[0060] See also Figure 6 、 Figure 8 、 Figure 11 and Figure 13In one embodiment, the lower die base further includes a base (not shown) and a guide mechanism (not shown). The lower die plate 30 is fixedly mounted on the base, the lower stripper plate 20 is guided and cooperates with the guide mechanism, and the upper die plate 40 is guided and cooperates with the guide mechanism. In this way, the pushing mechanism pushes the upper die plate 40 toward the lower die base. During the molding process, the guide mechanism guides the upper die plate 40, thereby ensuring the quality of the flanging of the lid 10. In addition, during the demolding process, the upper die plate 40 returns to its original position and leaves the lower die base, allowing the lower stripper plate 20 to move upward for demolding. The guide mechanism guides the lower die plate 30, thereby ensuring the quality of the demolding of the lid 10.

[0061] See also Figure 6 、 Figure 8 、 Figure 11 and Figure 13 Furthermore, the lower die base also includes an elastic reset member (not shown in the figure). The two ends of the elastic reset member abut against the base and the lower stripping plate 20 respectively. In this way, when the pushing mechanism pushes the upper template 40 downward to press the die, the upper template 40 also synchronously drives the lower stripping plate 20 to move downward. During the downward movement of the lower stripping plate 20, the elastic reset member is correspondingly compressed, and the elastic reset member stores elastic potential energy; after the die pressing is completed, the upper template 40 resets and leaves the lower die base. At this time, under the elastic thrust of the elastic reset member, the lower stripping plate 20 can move upward. During the upward movement of the lower stripping plate 20, the cover 10 can be pushed out of the lower template 30.

[0062] It should be noted that when one element is connected to another element, or when one element is mounted on another element, it is understood that the two elements may be connected using fasteners such as bolts, screws, pins, rivets, etc., or may be fixedly connected by clamping, welding, or integral molding. The integral molding method may be extrusion, casting, press-fitting, injection molding, or other processes.

[0063] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0064] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

[0065] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0066] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0067] In the present invention, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0068] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0069] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

Claims

1. A lower stripping plate, suitable for demoulding a lid (10) having a vertical flange (11), wherein the vertical flange (11) comprises a straight edge (111) and an arcuate edge (112) connected to the straight edge (111), characterized in that: The lower stripping plate (20) includes a body; the body includes a first plate surface (201) and a second plate surface (202) arranged opposite to each other, and a first through hole (203) formed through the first plate surface (201) and the second plate surface (202), the first plate surface (201) is used to abut against the vertical flange (11); the first through hole (203) is used to adapt to the shape of the lower template (30), the body is sleeved on the outside of the lower template (30) through the first through hole (203), and can The main body slides up and down relative to the lower template (30) along the axial direction of the first through hole (203); the circumferential portion around the first through hole (203) on the main body includes a straight edge portion (21) and an arc edge portion (22) connected to the straight edge portion (21); the first plate surface (201) of the straight edge portion (21) is provided with an avoidance groove (211) corresponding to the straight edge (111); the first plate surface (201) of the arc edge portion (22) is used to abut against the arc edge (112).

2. The lower stripping plate according to claim 1, characterized in that: There are two avoidance grooves (211), which are arranged opposite to each other and correspond one-to-one with the two straight edges (111) of the vertical flange (11); there are two arc-shaped edges (22), which are arranged opposite to each other and correspond one-to-one with the two arc-shaped edges (112) of the vertical flange (11).

3. The lower stripping plate according to claim 1, characterized in that: A transition groove (23) is further provided on the first plate surface (201) of the straight edge portion (21) and / or the arc edge portion (22); the transition groove (23) is connected to the avoidance groove (211), one end of the bottom wall of the transition groove (23) is connected to the first plate surface (201) of the arc edge portion (22), and the other end of the bottom wall of the transition groove (23) extends obliquely to the avoidance groove (211) relative to the first plate surface (201).

4. The lower stripping plate according to claim 3, characterized in that: The inclination angle of the bottom wall of the transition groove (23) relative to the first plate surface (201) is defined as a, and a is 5° to 30°.

5. The lower stripping plate according to claim 4, characterized in that: a is 10° to 15°.

6. The lower stripping plate according to claim 3, characterized in that: The sum of the length of the avoidance groove (211) and the length of the transition grooves (23) at both ends thereof is the same as the length of the straight edge (111).

7. The lower stripping plate according to claim 3, characterized in that: The avoidance groove (211) extends from one end of the straight edge portion (21) to the other end of the straight edge portion (21), and the transition groove (23) is provided on the first plate surface (201) of the arc edge portion (22).

8. The lower stripping plate according to claim 1, characterized in that: The depth of the avoidance groove (211) is defined as S, where S≧10 mm; and the width of the avoidance groove (211) is defined as W, where W≧10 mm.

9. A flanging forming device, characterized in that: The flanging forming device also includes a lower die base, an upper die base arranged opposite to the lower die base, and a pushing mechanism connected to the upper die base; the lower die base includes a lower template (30) and a lower stripping plate (20) as described in any one of claims 1 to 8; the lower stripping plate (20) is sleeved on the outside of the lower template (30) through the first through hole (203), and can slide up and down relative to the lower template (30) along the axial direction of the first through hole (203); the upper die base includes an upper template (40), and the upper template (40) is provided with a second through hole (41) adapted to the lower template (30) and is slidably sleeved on the outside of the lower template (30) through the second through hole (41).

10. The flanging forming device according to claim 9, characterized in that: The lower die base also includes a base and a guide mechanism, the lower template (30) is fixedly arranged on the base, the lower stripping plate (20) is guided and matched with the guide mechanism, and the upper template (40) is guided and matched with the guide mechanism; the lower die base also includes an elastic reset member, and the two ends of the elastic reset member respectively abut against the base and the lower stripping plate (20).

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