A mold

Abstract

The present application discloses a mold, comprising an upper mold body, an insert block assembly and a lower mold body. The insert block assembly comprises at least one bending insert block, the lower mold body is provided with a bottom die and two side blocking parts located on opposite sides of the bottom die, the bending insert block is detachably connected to the bottom die and located between the two side blocking parts, and the side blocking parts and the bending insert block are fixedly connected through fasteners. The mold disclosed by the present application is light in weight, small in size and low in energy consumption, and can be used to produce polygonal box seal products with short bending interval.

Description

Technical Field

[0001] This invention relates to the field of rubber molds, and more specifically to a mold. Background Technology

[0002] With the continuous development of the power equipment manufacturing industry, there is a specific demand in the market for rubber box edge sealing components. From the initial rectangular box edges, polygonal irregular-shaped box edges have gradually emerged. In common production practices, rubber box edge sealing components are mostly produced by integral molding using specialized molds. This requires mold design and manufacturing based on product dimensions and installation on large rubber vulcanizing equipment. This results in large volumes, difficult handling, high costs, and high energy consumption. Furthermore, due to limitations in molds and equipment, it is impossible to produce polygonal irregular-shaped box edge sealing components. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the purpose of this invention is to provide a mold to solve the problem that existing molds cannot produce polygonal irregular box edge sealing products.

[0004] To achieve the above objectives, the technical means adopted by the present invention are as follows: a mold includes an upper mold body, an insert assembly and a lower mold body, the insert assembly includes at least one bent insert, the lower mold body includes a bottom mold and two side stops located on opposite sides of the bottom mold, the bent insert is detachably connected to the bottom mold and located between the two side stops, and the side stops are fixedly connected to the bent insert.

[0005] Preferably, the bottom mold is provided with an upper limit rib, and the two ends of the upper limit rib are respectively connected to two side stops. The upper limit rib and the two side stops form a semi-closed inner cavity on the bottom mold, and the bent insert is located in the inner cavity.

[0006] Preferably, the bent insert includes a first connecting portion and a second connecting portion, with one end of the first connecting portion and one end of the second connecting portion fixedly connected to form a bent insert with a bent angle.

[0007] Preferably, the first connecting part has a first cavity, and the second connecting part has a second cavity, with the first cavity and the second cavity connected at the bend. During production, the adhesive material is placed inside the cavity.

[0008] Preferably, the bottom mold is further provided with a first sliding groove, which is located below the upper limit rib. The first connecting part is provided with a first through hole, and a fastener is inserted through the first through hole after it corresponds and matches the first sliding groove. The first through hole can be fixedly connected to any position of the first sliding groove, so that the bending insert can be detachably connected to the lower mold body.

[0009] Preferably, the bottom mold is further provided with a second sliding groove, which is located below the first sliding groove. The second connecting part is provided with a second through hole, and a fastener is inserted through the second through hole after it corresponds and matches the second sliding groove. The second through hole can be fixedly connected to any position of the second sliding groove, so that the bending insert can be detachably connected to the lower mold body.

[0010] Preferably, the outer side of the bent insert is also provided with a groove, and the side of the side stop is provided with a threaded hole, with the groove and the threaded hole corresponding to each other. A fastener passes through the threaded hole, and the fastener can tighten the bent insert.

[0011] Preferably, the bottom mold is further provided with a lower limiting rib, which is located below the upper limiting rib. The upper edge of the first connecting part abuts against the upper limiting rib, and the lower edge of the first connecting part abuts against the lower limiting rib. This prevents the bending insert from moving up and down during processing.

[0012] Preferably, there are two bent inserts, with one end of each bent insert connected to the other, and the other end located on the inner side of each of the two side stops.

[0013] Preferably, the bending angle of the bent insert is greater than 90° and less than 180°.

[0014] Preferably, the insert assembly further includes a plurality of straight inserts located between two bent inserts. This allows the mold to produce products with different lengths between the two bends.

[0015] Preferably, the linear insert is provided with a fourth through hole, and a fastener is inserted after the fourth through hole corresponds and matches with the first sliding groove, so that the linear insert is detachably connected to the lower mold body.

[0016] Preferably, the bottom mold is further provided with an mounting part, and the upper mold body and the lower mold body are connected through the mounting part.

[0017] The beneficial effects of this invention are as follows: This application sets up an upper mold body, an insert assembly, and a lower mold body to form a mold. The bent insert and the straight insert are detachably connected to the bottom mold, and different bent inserts and straight inserts can be selected according to the required rubber box edge seal product. Compared with traditional molds, on the one hand, this mold can produce polygonal box edge seal products with a short bending distance between the two points; on the other hand, this mold is lightweight, small in size, and consumes less energy. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural schematic diagram of the lower mold body 300 according to one embodiment of this application;

[0019] Figure 2 This is a three-dimensional structural diagram of the lower mold body 300 after the insert assembly is installed according to one embodiment of this application;

[0020] Figure 3This is a three-dimensional structural schematic diagram of the bent insert 210 according to one embodiment of this application;

[0021] Figure 4 This is a three-dimensional structural schematic diagram of the linear insert 200 according to an embodiment of this application;

[0022] Figure 5 This is a structural schematic diagram of the upper mold body 100 according to one embodiment of this application. Detailed Implementation

[0023] As requested, specific embodiments of the invention are disclosed herein. However, it should be understood that the embodiments disclosed herein are merely typical examples of the invention, which may be embodied in various forms. Therefore, the specific details disclosed herein are not to be considered limiting, but merely serve as the basis for the claims and as a representative basis for teaching those skilled in the art to apply the invention differently in practice in any appropriate manner, including employing the various features disclosed herein in combination with features that may not be explicitly disclosed herein.

[0024] See Figures 1 to 5 This embodiment provides a mold, which includes an upper mold body 100, an insert assembly, and a lower mold body 300. The insert assembly is located on the lower mold body 300. After the upper mold body 100 and the lower mold body 300 are closed and fixed, they are used for the molding and preparation of rubber seals by heating and pressurizing.

[0025] The lower mold body 300 includes a bottom mold 310 and two side stops 320. The bottom mold 310 is a plate with uniform thickness. The two side stops 320 are located on opposite sides of the bottom mold 310. The insert assembly is located between the two side stops 320 and the two ends of the insert assembly are fixedly connected to the two side stops 320 respectively to prevent the insert assembly from shifting.

[0026] The insert assembly includes at least one bent insert 210. The bent insert 210 includes a first connecting portion 211 and a second connecting portion 212 that are interconnected. The outer surface of the second connecting portion 212 is fixedly connected to the side stop portion 320. The first connecting portion 211 is disposed away from the side stop portion 320. Figure 2 In the direction of the bottom mold 310, the two side blocks 320 are located on both sides of the upper end of the bottom mold 310. The second connecting part 212 is fixedly connected to the side block 320 at the outer end of the end near the first connecting part 211, and the end of the second connecting part 212 away from the first connecting part 211 is located at the lower end of the bottom mold 310.

[0027] Specifically, both the first connecting part 211 and the second connecting part 212 are strip-shaped plates. One end of the first connecting part 211 and one end of the second connecting part 212 are connected to each other to form a bent insert 210 with a bend angle. The angle between the first connecting part 211 and the second connecting part 212 is defined as the bend angle of the bent insert 210. The bend angle is greater than 90° and less than 180°, and this bend angle is the same as the bend angle of the produced sealing component. In this embodiment, the first connecting part 211 and the second connecting part 212 are integrally formed. In other embodiments, the first connecting part and the second connecting part can also be fixedly connected by welding or other methods; this is not a limitation.

[0028] A first cavity 216 extending along its length is provided on the first connecting part 211, and the first cavity 216 passes through both ends of the first connecting part 211 along its length. A second cavity 217 extending along its length is provided on the second connecting part 212, and the second cavity 217 passes through both ends of the second connecting part 212 along its length. The first cavity 216 and the second cavity 217 are connected at the connection between the first connecting part 211 and the second connecting part 212 (at the bending angle of the bending insert 210) to form a cavity for integral molding of the rubber seal in the cavity. The seal product forms a bending angle segment at the bending angle.

[0029] The first connecting part 211 is provided with a first through hole 213. The through direction of the first through hole 213 is perpendicular to the plate surface of the first connecting part 211, and the first through hole 213 is set to avoid the first cavity 216. The bottom mold 310 is provided with a first sliding groove 313. The first sliding groove 313 is located between the upper end of the bottom mold 310 and the two side stops 320. The first sliding groove 313 is a strip-shaped groove extending from one side stop 320 to the other side stop 320. The first sliding groove 313 matches the first through hole 213. By fasteners passing through the first through hole 213 and the first sliding groove 313 in sequence, the first connecting part 211 of the bending insert 210 is fixedly connected to the bottom mold 310, realizing the detachable connection between the bending insert 210 and the lower mold body 300, and allowing the bending insert 210 to move and be positioned along the length direction of the first sliding groove 313. This is suitable for bending inserts 210 with various bending angles. The first through hole 213 can be set to one, two or more, and there is no restriction here.

[0030] The second connecting part 212 is provided with a second through hole 214. The through direction of the second through hole 214 is perpendicular to the plate surface of the second connecting part 212, and the second through hole 214 is set to avoid the second cavity 217. The bottom mold 310 is provided with a second sliding groove 314. The second sliding groove 314 is located at the lower end of the bottom mold 310. The second sliding groove 314 is a strip-shaped groove, and the extension direction of the second sliding groove 314 is parallel to the extension direction of the first sliding groove 313. The second sliding groove 314 is located below the first sliding groove 313. The second sliding groove 314 matches the second through hole 214. By fasteners passing through the second through hole 214 and the second sliding groove 314 in sequence, the second connecting part 212 of the bending insert 210 is fixedly connected to the bottom mold 310, realizing the detachable connection between the bending insert 210 and the lower mold body 300, and allowing the bending insert 210 to move and be positioned along the length direction of the second sliding groove 314. This is suitable for bending inserts 210 with various bending angles. The second through hole 214 can be set to one, two or more, without limitation.

[0031] The second connecting part 212 is provided with a groove 215 on the outer side of the bending angle of the bending insert 210. The side stop 320 is provided with a threaded hole 321. The groove 215 and the threaded hole 321 are correspondingly provided. The threaded hole 321 penetrates the side stop 320 in a direction perpendicular to the outer side surface of the side stop 320. After the fastener passes through the threaded hole 321, it presses against the groove 215 to realize the fixed connection between the side stop 320 and the bending insert 210, thereby preventing the bending insert 210 from slipping during molding. In this embodiment, the fastener is a bolt. After the bolt passes through the threaded hole 321, it presses against the groove 215, so that the bolt can press against the bending insert 210 in the through direction of the threaded hole 321. The depth of bolt pressing can be determined according to the setting position of the bending insert 210, so that the bending insert 210 cannot move along the length direction of the first slide groove 313 after being fastened.

[0032] In one embodiment, two bending inserts 210 are provided. The outer surfaces of the second connecting portions 212 of the two bending inserts 210 are respectively fixedly connected to two side stops 320. The first connecting portions 211 of the two bending inserts 210 are connected to each other, thereby forming a communicating cavity on the combined insert assembly for integrally manufacturing a rubber seal with two bending angles. Two second grooves 314 are provided at intervals along their length direction for respectively fixing the second connecting portions 212 of the two bending inserts 210.

[0033] In another embodiment, the insert assembly further includes a straight insert 200, which is disposed between the first connecting portions 211 of the two bent inserts 210, that is, the two ends of the straight insert 200 are respectively connected to the two first connecting portions 211, for the purpose of preparing rubber seals of different sizes.

[0034] The linear insert 200 is a rectangular plate. The direction formed by connecting the two ends of the two first connecting parts 211 on the linear insert 200 is defined as the length direction of the linear insert 200. A third cavity 201 extending along its length direction is formed on the linear insert 200, and the third cavity 201 passes through both ends of the linear insert 200 along its length direction. The third cavity 201 communicates with the first cavities 216 on the two first connecting parts 211, and is used for the integral molding of the rubber seal. The linear insert 200 is also provided with a fourth through hole 221. The through direction of the fourth through hole 221 is perpendicular to the plate surface of the linear insert 200, and the fourth through hole 221 is set to avoid the third cavity 201. The fourth through hole 221 matches the first sliding groove 313. By fasteners passing through the fourth through hole 221 and the first sliding groove 313 in sequence, the linear insert 200 is fixedly connected to the bottom mold 310, realizing the detachable connection between the linear insert 200 and the lower mold body 300. The fourth through hole 221 can be set to one, two or more, without limitation.

[0035] Meanwhile, the linear insert 200 can be set as one, two, or more. The dimension along its length direction of the linear insert 200 is defined as the length of the linear insert 200. Several linear inserts 200 are arranged sequentially, and the lengths of the linear inserts 200 can be the same. The total length of the insert assembly can be adjusted by sequentially combining different numbers of linear inserts 200. In other embodiments, the lengths of the linear inserts 200 can also be different. The total length of the insert assembly can be adjusted by sequentially combining or replacing linear inserts 200 of different lengths, resulting in an insert assembly of arbitrary length, which is then suitable for manufacturing rubber seals of various sizes, increasing the versatility of the mold.

[0036] Furthermore, the dimension of the straight insert 200 that is perpendicular to its length direction and parallel to the surface of the straight insert 200 is defined as the height of the straight insert 200, and the dimension of the first connecting portion 211 that is perpendicular to the length direction of the first cavity 216 and parallel to the surface of the first connecting portion 211 is defined as the height of the first connecting portion 211. Therefore, the height of the straight insert 200 is equal to the height of the first connecting portion 211. That is, the upper end face of the straight insert 200 is flush with the upper end face of the first connecting portion 211, and the lower end face of the straight insert 200 is flush with the lower end face of the first connecting portion 211.

[0037] Continue reading Figures 1 to 2The bottom mold 310 is provided with an upper limit rib 311 to limit the upward slippage of the bent insert 210 and the straight insert 200 during molding. The upper edge of the upper limit rib 311 coincides with the upper edge of the bottom mold 310, and the two ends of the upper limit rib 311 are respectively connected to two side stops 320. The upper limit rib 311 and the two side stops 320 form a semi-closed inner cavity on the bottom mold 310, in which the insert assembly is located. At the same time, the first slide groove 313 is located below the upper limit rib 311, so that the bent insert 210 and the straight insert 200 are installed in the inner cavity through the first slide groove 313, and the upper end face of the bent insert 210 and the straight insert 200 abuts against the upper limit rib 311.

[0038] In this embodiment, the inner edge of the side stop 320 forms a 135° angle with the lower end face of the upper limit rib 311, which can be applied to the bending insert 210 with a bending angle of 90° to 180° (excluding 90° and 180°), thereby producing sealing products with an angle of 90° to 180°. Specifically, a bending insert 210 with a suitable bending angle is selected according to the angle of the sealing product to be processed and placed in the lower mold body 300. The upper edge of the first connecting part 211 of the bending insert 210 is pressed against the upper limit rib 311, and a fastener is used to pass through the threaded hole 321 and press against the groove 215 of the second connecting part 212, thereby producing sealing products.

[0039] In other embodiments, the angle between the inner edge of the side stop 320 and the lower end face of the upper limit rib 311 can be 90° to 150° (excluding 90°, including 150°). Since the angle of the bent insert 210 is greater than 90°, the angle between the inner edge of the side stop 320 and the lower end face of the upper limit rib 311 only needs to be greater than 90°. In order to reduce the area of ​​the lower mold body 300 and save mold material, the angle between the inner edge of the side stop 320 and the lower end face of the upper limit rib 311 is set to be less than or equal to 150°. Within this range, the mold can be used to produce sealing products with an angle of 90° to 180°, and the effect of the fastener passing through the threaded hole to tighten the bent insert 210 is also better. For example, when the required polygonal box-side sealing product is a regular hexagon, the bending angle of the sealing product is 120°. Therefore, a 120° angle is formed between the inner edge of the side baffle 320 and the lower end face of the upper limit rib 311. The bending insert 210 with a bending angle of 120° is directly placed in the lower mold body 300 for direct matching and fixation, which is convenient for production. When the required polygonal box-side sealing product is a regular pentagon, the bending angle of the sealing product is 108°. Therefore, a 108° angle is formed between the inner edge of the side baffle 320 and the lower end face of the upper limit rib 311. The bending insert 210 with a bending angle of 108° is directly placed in the lower mold body 300 for direct matching and fixation, which is convenient for production. The angle between the inner edge of the side stop 320 and the lower end face of the upper limit rib 311 is set to be equal to the angle of the bending angle of the sealing product. This is to facilitate fixing the bending insert 210 with the same angle. Of course, bending inserts with other angles can also be placed to produce sealing products with other angles. The setting is based on the actual use and is not limited here.

[0040] A lower limiting rib 312 is provided on the bottom mold 310 to restrict the downward sliding of the bent insert 210 and the straight insert 200 during molding. The lower limiting rib 312 is located below the upper limiting rib 311 and is arranged parallel to the upper limiting rib 311. The distance between the lower limiting rib 312 and the upper limiting rib 311 is equal to the height of the first connecting part 211. That is, when the bent insert 210 and the straight insert 200 are installed in the inner cavity, the first connecting part 211 of the bent insert 210 and the lower edge of the straight insert 200 abut against the lower limiting rib 312, so that the bent insert 210 and the straight insert 200 are restricted by the upper limiting rib 311 and the lower limiting rib 312 in the inner cavity and cannot move up and down.

[0041] In this embodiment, the lower limiting rib 312 is centrally located on the bottom mold 310, and its length is half the length of the upper limiting rib 311, ensuring that the lower limiting rib 312 does not obstruct the installation of the bent insert 210 in the inner cavity. In other embodiments, the lower limiting rib can be set to other lengths or in other positions, as long as it can limit the bending insert and the straight insert without obstructing the installation of the bending insert; no restrictions are imposed here.

[0042] Furthermore, the bottom mold 310 is provided with a first weight-reducing hole 315, which can reduce the weight of the bottom mold 310, save materials, and reduce costs. In this embodiment, there is one first weight-reducing hole 315, which is a rounded rectangle located between the lower limiting rib 312 and the second slide groove 314. In other embodiments, there may be multiple first weight-reducing holes, depending on the actual use, and no limitation is made here.

[0043] See Figure 1 and Figure 5 The lower mold body 300 is also provided with a mounting part 330, which includes a positioning pin 331 and a safety part 332. The safety part 332 is a columnar body. After the insert assembly is installed in the semi-enclosed inner cavity of the bottom mold 310, it covers the upper mold cover plate 110 when the mold is closed. At this time, the safety part 332 presses against the upper mold cover plate 110, so that there is a gap between the upper mold cover plate 110 and the insert assembly, preventing the upper mold body 100 from crushing the insert assembly and the lower mold body 300 under abnormal pressure. The positioning pin 331 is vertically provided on the surface of the bottom mold 310, and the positioning pin 331 passes through the safety part 332. In other embodiments, the positioning pin can be directly provided on the surface of the safety part, or provided on the part of the bottom mold that does not contact the safety part, as long as it can play a positioning role, there is no limitation here. In this embodiment, there are three mounting parts 330, two of which are located on the side guard 320 and have irregular outlines; the other mounting part 330 is located at the lower end of the bottom mold 310 and has a circular outline. In other embodiments, there may be at least one mounting part, and the mounting parts may be of any shape and distributed at any position on the bottom mold, as long as they do not affect the normal use of the mold, and there are no restrictions here.

[0044] The lower mold body 300 is also provided with two first handles 340, which are located on the outer side of the bottom mold 310, for opening or closing the upper mold body 100 and the lower mold body 300, so as to facilitate manual operation.

[0045] Continue reading Figure 5 The upper mold body 100 includes an upper mold cover plate 110, a second lightening hole 120, a positioning hole 130, and two second handles 140.

[0046] The upper mold cover plate 110 is the same size and shape as the bottom mold 310, and is used to cover the lower mold body 300 and to transfer heat and pressure to the installed insert assembly and the lower mold body 300.

[0047] The second weight-reducing hole 120 is used to reduce the weight of the upper mold cover plate 110, saving materials and reducing costs. In this embodiment, two second weight-reducing holes 120 are provided, and the second weight-reducing holes 120 are rounded rectangles. When the upper mold cover plate 110 covers the lower mold body 300, the second weight-reducing holes 120 must not be located above the straight insert 200 and the bent insert 210 to prevent the glue from overflowing or the insert assembly from moving during processing. In other embodiments, the second weight-reducing hole may also be provided in multiple ways, depending on the actual use, and is not limited here.

[0048] The positioning holes 130 and the mounting part 330 are set in the same position and number. The positioning holes 130 and the positioning pins 331 on the mounting part 330 cooperate with each other. The positioning pins 331 pass through the positioning holes 130 to position with the upper mold body 100, which facilitates disassembly and assembly operations and can ensure the installation accuracy of the upper mold body 100 and the lower mold body 300.

[0049] Two second handles 140 are located on the outer side of the upper mold body 100, used to open or close the upper mold body 100 and the lower mold body 300, facilitating manual operation. Simultaneously, when the upper mold cover plate 110 covers the lower mold body 300, the second handles 140 are moved away from the first handle 340, preventing contact between the second handles 140 and the first handle 340, thus avoiding difficulty in separating the upper mold cover plate 110 and the lower mold body 300.

[0050] The working principle of this invention is as follows: In use, first, grasp the second handle 140 to open the upper mold body 100. Based on the required product size, select two bending inserts 210 with appropriate bending angles, align the first connecting portions 211 of the two bending inserts 210, and place them into the inner cavity; alternatively, simultaneously select straight inserts 200 of appropriate size and quantity and place them between the first connecting portions 211 of the two bending inserts 210 to accommodate the size of the product being prepared; or, select only one bending insert 210 and place it into the inner cavity, then press it against other products of different lengths after processing to obtain a product longer than the mold. Next, abut the upper edge of the first connecting portion 211 against the upper limit rib 311, and the lower edge against the lower limit rib 312. Then, tighten the bolts passing through the two threaded holes 321, causing the bolts to press against the bending inserts 210 from left and right, restricting the left and right movement of the bending inserts 210. Next, fasteners are used to pass through the first through hole 213 and the first slide groove 313, and through the second through hole 214 and the second slide groove 314, respectively, to fix the bent insert 210 to the bottom mold 310. Then, solid rubber material is placed into the cavity. Next, under the action of the positioning pin 331, the upper mold body 100 is placed on top of the lower mold body 300, with the positioning pin 331 passing through the positioning hole 130. Finally, the mold is placed into the vulcanizing equipment for heating by holding the first handle 340. After the mold reaches the predetermined temperature, it is cleaned and reheated to the production temperature. After processing, the mold is opened by holding the second handle 140, and the processed product is removed.

[0051] When the required product can be formed in one go using this mold, the appropriate insert component can be selected and placed into the inner cavity according to the length and bending angle of the product. The upper edge of the first connecting part 211 of the bending insert 210 abuts against the upper limit rib 311, and the lower edge abuts against the lower limit rib 312. The second connecting part 212 of the bending insert 210 can abut against the side stop 320 or not contact the side stop 320. The bolt passes through the threaded hole 321 and tightens the bending insert 210.

[0052] If the mold cannot produce the required product in one go, it can be split for production, producing only one bent corner segment at a time. A selected bent insert 210 is placed into the inner cavity. The upper edge of the first connecting part 211 of the bent insert 210 abuts against the upper limit rib 311, and the lower edge abuts against the lower limit rib 312. A bolt passes through the threaded hole 321 and tightens the bent insert 210. Solid rubber material is placed into the cavity of one bent insert 210 for production. After both bent corner segments are produced, they are pressed together according to the required length, or a straight segment of appropriate length is added between the two bent corner segments and then pressed together to obtain the desired product.

[0053] This mold can produce sealing products with adjustable length and bending angle. The mold is small in size, low in cost, energy-saving, and easy to use.

[0054] The technical content and features of this invention have been disclosed above. However, it is understood that, under the inventive concept of this invention, those skilled in the art can make various changes and improvements to the above-described structures and materials, including combinations of the technical features disclosed or claimed herein, and explicitly including other combinations of these features. All such modifications and / or combinations fall within the technical field of this invention and are within the scope of protection of the claims of this invention.

Claims

1. A mold, characterized in that, The device includes an upper mold body, an insert assembly, and a lower mold body. The insert assembly includes at least one bent insert. The lower mold body includes a bottom mold and two side stops located on opposite sides of the bottom mold. The bent insert is detachably connected to the bottom mold and located between the two side stops. The side stops are fixedly connected to the bent insert. The bent insert includes a first connecting part and a second connecting part. One end of the first connecting part is fixedly connected to one end of the second connecting part to form the bent insert with a bent angle. The bottom mold is also provided with a first sliding groove and a second sliding groove. The second sliding groove is located below the first sliding groove. The first connecting part is provided with a first through hole. After the first through hole corresponds and matches with the first sliding groove, a fastener is inserted. The second connecting part is provided with a second through hole. After the second through hole corresponds and matches with the second sliding groove, a fastener is inserted.

2. The mold according to claim 1, characterized in that, The bottom mold is provided with an upper limit rib, and the two ends of the upper limit rib are respectively connected to the two side stops. The upper limit rib and the two side stops form a semi-closed inner cavity on the bottom mold, and the bending insert is located in the inner cavity.

3. The mold according to claim 1, characterized in that, The first connecting part is provided with a first cavity, and the second connecting part is provided with a second cavity. The first cavity and the second cavity are connected at the bending angle.

4. The mold according to claim 2, characterized in that, The first groove is located below the upper limit rib.

5. The mold according to claim 1, characterized in that, The outer side of the bent insert is also provided with a groove, and the side of the side stop is provided with a threaded hole, with the groove and the threaded hole corresponding to each other.

6. The mold according to claim 2, characterized in that, The bottom mold is also provided with a lower limit rib, which is located below the upper limit rib. The upper edge of the first connecting part abuts against the upper limit rib, and the lower edge of the first connecting part abuts against the lower limit rib.

7. The mold according to claim 1, characterized in that, The bending insert is configured as two, with one end of the two bending inserts connected to each other, and the other end located on the inner side of the two side stops respectively.

8. The mold according to claim 1, characterized in that, The bending angle of the bent insert is greater than 90° and less than 180°.

9. The mold according to claim 7, characterized in that, The insert assembly also includes a plurality of straight inserts, wherein the plurality of straight inserts are located between two of the bent inserts.

10. The mold according to claim 9, characterized in that, The straight insert is provided with a fourth through hole. After the fourth through hole corresponds and matches with the first slide groove, a fastener is inserted to make the straight insert detachably connected to the lower mold body.

11. The mold according to claim 1, characterized in that, The bottom mold is also provided with an installation part, and the upper mold body and the lower mold body are connected through the installation part.

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