Die

Abstract

The utility model provides a die which comprises an upper die and a lower die, the lower die comprises a lower die plate and a lower die base, and the lower die plate is provided with a lower die core; the lower die base is provided with a center insert assembly, the center insert assembly comprises a first center insert, a second center insert and a connecting piece, one end of the first center insert upwards penetrates through the lower die core and extends into the upper die, the second center insert is separably arranged at the upper end of the first center insert, and the first end of the connecting piece is connected with the second center insert; the middle of the connecting piece is movably inserted into the first center insert, a cavity is formed among the upper mold, the lower mold core and the center insert assembly, and at least part of the bottom wall of the cavity is arranged on the lower mold core; during mold opening, the lower mold base is far away from the lower mold plate in the mold opening direction, the first center insert is firstly driven to move by a first preset distance relative to the lower mold core, the second center insert and the connecting piece, and then the connecting piece drives the second center insert to move along with the first center insert; the ejection mechanism is small in size, low in height and convenient to eject a product with a deep cavity structure.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to a mold. Background Art

[0002] Traditional injection molds generally consist of an upper mold and a lower mold. The lower mold includes a lower mold plate, an ejector plate, a base plate, and two mold feet. The mold feet are mounted on the base plate, and the lower mold plate is mounted on the mold feet. The ejector plate is positioned below the lower mold plate and between the two mold feet. The ejector plate is equipped with several ejector pins that extend upward through the lower mold plate into the mold cavity to eject the product when the mold is opened. The arrangement of the ejector plate, ejector pins, and mold feet makes the overall height of the injection mold relatively high. The height of the injection mold is one of the important factors affecting the tonnage of the injection molding machine. Generally speaking, the higher the overall mold height, the greater the tonnage requirement of the injection molding machine.

[0003] For Figure 1 The product with a deep cavity structure shown here consists of a peripheral wall and a top wall, with a cavity formed between them. The cavity is deeper than it is wide. Because of the product's deep cavity, using an injection mold with an ejector pin would make the mold too tall, requiring a larger injection molding machine. Furthermore, the ejector pin structure makes it difficult to eject the product and can affect the surface quality. Summary of the Invention

[0004] The purpose of the utility model is to provide a mold which is small in size, low in height and convenient for ejecting products with a deep cavity structure.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a mold, including an upper mold and a lower mold, the lower mold includes a lower mold plate and a lower mold base from top to bottom, and a lower mold core is provided on the lower mold plate; a center insert assembly is provided on the lower mold base, and the center insert assembly includes a first center insert, a second center insert and a connecting piece, one end of the first center insert passes upward through the lower mold plate and the lower mold core and extends into the upper mold, the second center insert is detachably arranged at the upper end of the first center insert, the first end of the connecting piece is connected to the second center insert, and the middle part of the connecting piece is movably inserted in the first center insert, a cavity is formed between the upper mold, the lower mold core and the center insert assembly, and at least a part of the bottom wall of the cavity is provided on the lower mold core; when the mold is opened, the lower mold base moves away from the lower mold plate along the mold opening direction, and drives the first center insert to move a first preset distance relative to the lower mold core, the second center insert and the connecting piece, and then the connecting piece drives the second center insert to move along the mold opening direction together with the first center insert.

[0006] It can be seen from the above scheme that a center insert assembly is provided to form a cavity inside a molding product; a second center insert is detachably provided on the upper end of the first center insert. When the mold is opened, the first center insert is first separated from the second center insert, and then the second center insert and the first center insert are synchronously moved to demold, thereby realizing the separation of the center insert assembly from the product in batches. On the one hand, it is beneficial to reduce the demolding force. On the other hand, the second center insert can be used to temporarily fix the product to avoid the product moving with the first center insert, thereby ensuring successful demolding. It is particularly suitable for products with a deep cavity structure. In addition, the utility model does not require the provision of an ejector plate, ejector and mold foot. Compared with the existing mold, the utility model can reduce the overall height of the mold and reduce the mold volume, thereby facilitating the selection of an injection molding machine with a smaller tonnage for injection molding production, thereby saving production costs.

[0007] A further solution is that the lower mold also includes a base plate, a push plate assembly and a pull rod. The base plate is connected to the bottom of the lower mold base, the push plate assembly is movably arranged on the base plate and connected to the second end of the connecting piece, the lower end of the pull rod is detachably connected to the push plate assembly, and the upper end of the pull rod passes through the lower mold base and is connected to the lower template; when opening the mold, the lower mold base and the base plate first move downward along the mold opening direction by a first preset distance, so that the lower mold base abuts against the push plate assembly, and then the lower mold base pushes the push plate assembly and the connecting piece to move downward together.

[0008] It can be seen from the above scheme that by setting up the push plate assembly and the pull rod, when the mold is opened, the lower mold base and the bottom plate first drive the first center insert to move a first preset distance away from the lower mold plate and the lower mold core, so that the first center insert is separated from the second center insert. Then, the lower mold base drives the connecting part and the second center insert to move together with the first center insert through the pull rod and the push plate assembly, so that the center insert assembly can be completely separated from the product, making it convenient to remove the product.

[0009] A further solution is that the connecting part is a water pipe, and the number of connecting parts is set to two; a first cooling water channel and a fixing pin are provided in the second center insert, the two ends of the first cooling water channel are respectively connected to the two water pipes, and the upper end of the water pipe is connected to the second center insert through the fixing pin, and a second cooling water channel is provided in the push plate assembly, and the lower end of the water pipe is connected to the second cooling water channel.

[0010] It can be seen from the above scheme that by setting the connecting part as a water pipe, on the one hand, it can drive the second center insert to move, and on the other hand, it can facilitate the flow of cooling water, thereby realizing the cooling effect of the first center insert and the second center insert, and facilitating uniform cooling of the product.

[0011] A further solution is that an elastic limiting member is provided in the push plate assembly, and the lower end of the pull rod is detachably connected to the elastic limiting member.

[0012] It can be seen from the above scheme that by setting an elastic limiter, the pull rod can be fixed so that the push plate assembly can move synchronously with the lower template, and the pull rod and the push plate assembly can be separated when necessary, making it convenient to open the mold to a sufficient distance between the lower template and the lower mold base, thereby facilitating the removal of the product.

[0013] A further solution is that the center insert assembly also includes a third center insert and a first movable part, a first mounting groove is opened on the upper part of the first center insert, the third center insert is movably arranged in the first mounting groove, the first movable part is movably arranged in the first center insert, and the upper part of the first movable part slides with the third center insert; the lower mold also includes a driving device and a second movable part, the second movable part slides with the lower part of the first movable part, the driving device can drive the second movable part to move along the vertical mold opening direction, and then drive the first movable part to move along the mold opening direction, so as to force the third center insert to retract into or protrude from the side wall of the first center insert.

[0014] It can be seen from the above scheme that by setting a third center insert, it is used to form the hole position on one side of the product; by setting a driving device, a second movable part and a first movable part, the driving device drives the first movable part to move along the mold opening direction through the second movable part, thereby forcing the third center insert to move along the direction perpendicular to the mold opening, thereby facilitating the demolding of the third center insert and the product.

[0015] A further solution is that the second center insert is provided with a second mounting groove, the first center insert is also provided with a third mounting groove, and the second mounting groove is connected to the third mounting groove; the center insert assembly also includes a fourth center insert, the fourth center insert is arranged in the third mounting groove, and one end of the fourth center insert extends upward and is slidably inserted into the second mounting groove.

[0016] It can be seen from the above scheme that through the above setting, the fourth center insert is used to form the groove on the other side of the product on the one hand, and can play a guiding role on the other hand, which is conducive to the sliding connection between the first center insert and the second center insert.

[0017] A further solution is that the upper mold includes a top plate, an upper mold core, an upper mold base, four slide assemblies and several inclined rods. The upper mold base is arranged below the top plate. The upper mold base is provided with a first accommodating groove. The upper mold core is arranged on the top plate and corresponds to the first accommodating groove. The four slide assemblies are enclosed in the first accommodating groove, and the center insert assembly is arranged in the middle of the four slide assemblies; the first end of the inclined rod is connected to the top plate, and the second end of the inclined rod is cooperated with the slide assembly. The inclined rod can force the slide assembly to move along the vertical mold opening direction.

[0018] It can be seen from the above scheme that, through the above arrangement, the four slide assemblies are used to realize the outer peripheral wall of the product, and the inclined rod drives the slide assembly to move along the vertical mold opening direction to realize the demoulding of the slide assembly and the product.

[0019] A further solution is that the slide assembly includes a slide member and a slide insert, the slide insert is connected to the side of the slide member facing the center insert assembly, the side wall of the slide insert constitutes the cavity wall of the mold cavity, and an inclined hole is provided on the upper part of the slide member; the first end of the inclined rod is fixedly connected to the top plate through a fixed block, and the second end of the inclined rod is movably inserted into the inclined hole, and an elastic member is provided in the inclined hole, and one end of the elastic member is elastically abutted against the fixed block.

[0020] It can be seen from the above solution that by providing the elastic member, at the moment of mold opening, the elastic member applies an upward force to the inclined rod, ensuring that the inclined rod can drive the slide to move at the first time.

[0021] A further solution is that a protrusion is provided on the upper die core; a groove is provided on the slide insert, and the protrusion and the groove are matched in a concave-convex manner.

[0022] It can be seen from the above scheme that through the above setting, the upper mold core can press the slide insert toward the cavity when the mold is closed, which not only makes the connection between the two adjacent slide inserts tighter, but also makes the connection between the upper mold core and the slide insert tighter, preventing unnecessary gaps in the cavity, which is beneficial to improving product quality.

[0023] A further solution is that a snap assembly is provided between the upper mold and the lower mold, and the snap assembly includes a wedge block and a pull block; a sliding groove is provided on the bottom wall of the sliding assembly, and the wedge block is arranged in the sliding groove; the first end of the pull block is movably arranged in the sliding groove and can be engaged with the wedge block, and the second end of the pull block passes through the lower template and is fixedly connected to the lower mold base.

[0024] It can be seen from the above scheme that through the above setting, when opening the mold, the slide assembly moves outward along the direction perpendicular to the mold opening, so that the wedge block and the pull block are separated, and then the mold can be opened between the upper mold base and the lower mold plate, which is conducive to ensuring the mold opening order and avoiding damage to the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of a product that is injection molded using an embodiment of the utility model.

[0026] Figure 2 It is a structural diagram of an embodiment of the present utility model.

[0027] Figure 3 It is a top view of an embodiment of the present utility model.

[0028] Figure 4 yes Figure 3 Cross-sectional view at AA in the middle.

[0029] Figure 5 yes Figure 4 Enlarged view of point C in the middle.

[0030] Figure 6 yes Figure 4Enlarged view of point D in the middle.

[0031] Figure 7 This is an exploded view of the central insert assembly, the upper mold core, and the four slide assemblies in an embodiment of the present invention.

[0032] Figure 8 It is an exploded view of the first slide assembly in the embodiment of the present utility model.

[0033] Figure 9 It is a cross-sectional view of the first slide assembly in an embodiment of the present utility model.

[0034] Figure 10 It is a structural diagram of the upper mold core in an embodiment of the present utility model.

[0035] Figure 11 It is a structural diagram of the driving device and the central insert assembly in the embodiment of the present utility model.

[0036] Figure 12 It is an exploded view of the drive device and the center insert assembly in the embodiment of the utility model.

[0037] Figure 13 It is an exploded view of the first center insert and the second center insert in the embodiment of the present utility model.

[0038] Figure 14 It is a structural diagram of the first central insert in an embodiment of the present utility model.

[0039] Figure 15 yes Figure 3 Cross-sectional view at the middle BB.

[0040] Figure 16 yes Figure 15 Enlarged view of point E in the middle.

[0041] Figure 17 yes Figure 15 Enlarged view of point F in the middle.

[0042] Figure 18 It is a schematic diagram of a state during the mold opening process of the lower template and the lower mold base in an embodiment of the present utility model.

[0043] Figure 19 yes Figure 18 Enlarged view of point G in the middle.

[0044] Figure 20 It is a schematic diagram of another state of the lower template and the lower mold base during the mold opening process in an embodiment of the present invention.

[0045] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0046] See also Figure 1 The product 1 includes a peripheral wall 11 and a top wall 12. The peripheral wall 11 is arranged around the top wall 12. The peripheral wall 11 and the top wall 12 enclose a chamber. The depth of the chamber is greater than the width of the product 1. A hole group 111 is provided on the first side of the peripheral wall 11. The hole group 111 includes a rectangular hole and four circular holes of different sizes. A number of circular holes are opened on the top wall 12. The rectangular holes, circular holes and circular holes are all connected to the chamber. A first through-hole is provided on the second side of the peripheral wall 11 (not shown in the figure). A plurality of windows 13 are also provided at the connection between the peripheral wall 11 and the top wall 12. The plurality of windows 13 are arranged along the extension direction of the peripheral wall 11. The windows 13 are connected to the chamber. A second through-hole (not shown in the figure) is also provided on the inner wall of the second side of the peripheral wall 11.

[0047] See also Figures 2 to 7 A mold provided in this embodiment includes an upper mold 2 and a lower mold 3 arranged along the up and down directions. The up and down directions in this embodiment are the mold opening directions.

[0048] The upper mold 2 comprises a top plate 21, an upper mold base 22, an upper mold core 23, and four slide assemblies 24a. The top plate 21 is positioned above the upper mold base 22. A first receiving slot is defined in the center of the upper mold base 22. The upper mold core 23 is positioned on the top plate 21 and corresponds to the first receiving slot. The four slide assemblies 24a are enclosed within the first receiving slot.

[0049] The lower mold 3 includes, from top to bottom, a lower mold plate 31, a lower mold base 32, and a bottom plate 33. A lower mold core 34 is provided in the middle of the lower mold plate 31. The lower mold core 34 is provided between the four slide assemblies 24a and is provided corresponding to the upper mold core 23. A center insert assembly 5 is provided on the lower mold base 32. One end of the center insert assembly 5 extends upward through the lower mold plate 31 and the lower mold core 34 and into the middle of the four slide assemblies 24a. A cavity for molding the product 1 is formed between the upper mold core 23, the lower mold core 34, the center insert assembly 5, and the four slide assemblies 24a. At least a portion of the bottom wall of the cavity is provided on the lower mold core 34, so that the molded product 1 is supported on the lower mold core 34. A glue inlet is provided on the top plate 21, and the glue inlet is connected to the cavity.

[0050] When the mold is opened, the central insert assembly 5 can move downward relative to the lower mold core 34 along the mold opening direction, so that the product 1 stays on the lower mold core 34, and the central insert assembly 5 and the product 1 are demoulded.

[0051] Combine Figure 1 、 Figure 4 、 Figures 7 to 9Each slide assembly 24a comprises a slide member, a slide insert, and two diagonal rods. The slide insert is attached to the side of the slide member facing the center insert assembly 5 and has curved sidewalls that partially form the cavity walls. The first ends of the diagonal rods are connected to the top plate 21 via fixed blocks, while the second ends of the diagonal rods engage the slide members. When the mold is opened between the top plate 21 and the upper mold base 22, the diagonal rods drive the slide member and slide insert away from the product 1, allowing the slide insert to be released from the mold.

[0052] Each slider assembly 24a shares the same structural principles, differing in that the structure on the curved sidewall of each slider insert matches the corresponding portion of the peripheral wall 11 of the product 1. This embodiment will be described in detail using the slider assembly 24a corresponding to the side of the hole group 111 of the product 1 as an example; the other three slider assemblies 24a will not be described in detail.

[0053] For ease of explanation, the slider assembly 24a corresponding to the side of the hole group 111 of product 1 is named the first slider assembly 24, the slider member therein is named the first slider member 241, the slider insert therein is named the first slider insert 242, the inclined rod therein is named the first inclined rod 243, and the fixed block therein is named the first fixed block 244. Specifically:

[0054] Two inclined holes 2411 are provided on the upper portion of the first positioning member 241, and the inclined holes 2411 extend obliquely along the mold opening direction. The inclined holes 2411 are configured as stepped holes, and an annular step 24111 is formed inside the inclined holes. The first end of the first inclined rod 243 is fixedly connected to the top plate 21 through the first fixed block 244. The first fixed block 244 is disposed at the opening of the first inclined hole 2411, and the second end of the first inclined rod 243 is movably inserted into the first inclined hole 2411. An elastic member 245 is disposed in the inclined hole 2411. The elastic member 245 is preferably a compression spring, which is sleeved on the outer side of the first inclined rod 243, and the two ends of the elastic member 245 elastically abut between the annular step 24111 and the first fixed block 244.

[0055] At the moment when the top plate 21 and the upper mold base 22 open the mold, under the elastic action of the elastic member 245, the top plate 21 can immediately drive the first inclined rod 243 to move upward, and then drive the first row member 241 and the first row insert 242 to move outward along the vertical mold opening direction through the first inclined rod 243, thereby realizing the demolding of the first row insert 242 and the product 1.

[0056] A rectangular protrusion and four circular protrusions of different sizes are provided on the arcuate groove wall of the first row insert 242 . The rectangular protrusion and the circular protrusion extend into the mold cavity to form the hole group 111 of the product 1 .

[0057] Combine Figure 4 、 Figure 5 、 Figure 10To improve the tightness of the connection between the upper mold core 23 and each slide insert, this embodiment provides four protrusions 231 on the upper mold core 23. The four protrusions 231 are respectively provided on the four sides of the upper mold core 23. The shapes and sizes of the four protrusions 231 can be the same or different, and are not limited here.

[0058] Correspondingly, each of the four slide inserts has a groove 2421, which mates with the corresponding protrusion 231 in a concave-convex manner, allowing the protrusion 231 to fit within the groove 2421 when the mold is closed. Furthermore, the sidewall of the groove 2421, which faces the mold cavity, is inclined, and the sidewall corresponding to the protrusion 231 cooperates with this groove wall. As the protrusion 231 begins to fit into the groove 2421, it gradually moves downward along the groove wall, exerting an inward force on the slide insert, ensuring that the slide insert is tightly pressed inward.

[0059] Combine Figure 4 and Figure 6 A plurality of buckle assemblies 4 are provided between the upper die 2 and the lower die 3. The buckle assemblies 4 are respectively provided around the cavity. The buckle assemblies 4 include a wedge block 41 and a pull block 42.

[0060] A sliding groove 2412 is provided on the bottom wall of the slider assembly 24a. In this embodiment, the sliding groove 2412 is preferably provided on the bottom wall of the slider. The wedge block 41 is arranged in the side of the sliding groove 2412 facing away from the cavity. A preset space is provided on the side of the sliding groove 2412 close to the cavity.

[0061] The first end of the pull block 42 is provided with a hook portion 421, which is movably disposed within the slide slot 2412 and can engage with the wedge block 41. The second end of the pull block 42 passes through the lower mold plate 31 and is fixedly connected to the lower mold base 32. The lower mold plate 31 has a clearance hole, the width of which is larger than the width of the pull block 42. The second end of the pull block 42 is fixedly connected to the lower mold base 32 via bolts.

[0062] In the mold-closing state, the hook 421 engages with the wedge 41, ensuring a secure connection between the lower mold base 32 and the slide assembly 24a. During mold opening, the slide assembly 24a first moves outward perpendicular to the mold-opening direction, separating the hook 421 from the wedge 41. Only then can the mold be opened between the upper mold base 22 and the lower mold plate 31. By providing the snap assembly 4 in this embodiment, the mold opening operation is ensured to proceed according to the preset action, ensuring a smooth mold opening process.

[0063] See also Figures 11 to 17 The center insert assembly 5 includes a first center insert 51 , a second center insert 52 and a connecting piece 53 .

[0064] The first center insert 51 includes a columnar portion 511 and a base portion 512. The columnar portion 511 is mounted on the base portion 512, and the two are integrally formed. The base portion 512 is mounted within and connected to the lower mold base 32. The columnar portion 511 extends upward through the lower mold plate 31 and the lower mold core 34, and extends into the center of the four slide inserts.

[0065] The second center insert 52 is detachably mounted on the upper end of the first center insert 51. The second center insert 52 cooperates with the upper mold core 23 to form the top wall 12 of the product 1 and the connection between the top wall 12 and the peripheral wall 11. A connecting member 53 has a first end connected to the second center insert 52. The middle portion of the connecting member 53 is movably inserted into the first center insert 51. The second end of the connecting member 53 extends downwardly beyond the base portion 512.

[0066] When the mold is opened between the lower template 31 and the lower mold base 32, the lower mold base 32 and the bottom plate 33 move away from the lower template 31 along the mold opening direction, first driving the first center insert 51 to move down a first preset distance relative to the lower mold core 34, the second center insert 52 and the connecting member 53, so that the first center insert 51 is first demolded from the product 1. At this time, the first center insert 51 is separated from the second center insert 52; then, the mold is continued to be opened between the lower template 31 and the lower mold base 32, and the connecting member 53 can drive the second center insert 52 to move along the mold opening direction with the first center insert 51, so that the second center insert 52 is demolded from the product 1, thereby realizing the demolding operation of the center insert assembly 5 and the product 1.

[0067] In order to drive the connection member 53 to move, a driving assembly for driving the connection member 53 downward can be separately provided, or the connection member 53 can be driven to move by utilizing the downward movement of the lower die base 32 and the bottom plate 33. The latter is preferred in this embodiment. Specifically:

[0068] A push plate assembly 6 and a pull rod 7 are provided on the bottom plate 33. A second receiving groove 331 is provided in the middle of the bottom plate 33. The push plate assembly 6 is movably disposed in the second receiving groove 331. The depth of the second receiving groove 331 is greater than the total height of the push plate assembly 6, so that the push plate assembly 6 can move relatively in the second receiving groove 331 along the mold opening direction. In the mold closing state, a second preset distance L1 is spaced between the top wall 12 of the push plate assembly 6 and the bottom wall of the lower mold base 32. Preferably, the second preset distance L1 is equal to the first preset distance. The lower end of the pull rod 7 is detachably connected to the push plate assembly 6, and the upper end of the pull rod 7 passes through the lower mold base 32 and is connected to the lower mold plate 31.

[0069] When the mold is opened, the lower mold base 32 and the bottom plate 33 move downward a first preset distance relative to the lower mold plate 31 along the mold opening direction, first driving the first center insert 51 to move downward relative to the lower mold core 34. At this time, the push plate assembly 6 and the connecting member 53 are both fixed until the bottom wall of the lower mold base 32 abuts against the top wall of the push plate assembly 6. During this process, the first center insert 51 and the second center insert 52 are separated, and the second center insert 52 and the lower mold core 34 use a stopping effect on the product 1 to make the first center insert 51 demoulded from the product 1 first; then the lower mold base 32 and the bottom plate 33 continue to open the mold, and the lower mold base 32 pushes the push plate assembly 6 to move along the mold opening direction, so that the pull rod 7 is separated from the push plate assembly 6. After that, the push plate assembly 6 drives the second center insert 52 and the first center insert 51 to move synchronously through the connecting member 53, so that the second center insert 52 and the product 1 are demoulded.

[0070] Combine Figure 15 and Figure 16 To achieve a removable connection between the pull rod 7 and the push plate assembly 6, an elastic stopper 61 is provided within the push plate assembly 6. This elastic stopper 61 can be a spring ball and is arranged perpendicular to the mold opening direction. A limit slot is provided at the lower end of the pull rod 7, and one end of the elastic stopper 61 is removable from the limit slot.

[0071] The limiting grooves of this embodiment include a first limiting groove 71 and a second limiting groove 72. The first limiting groove 71 is disposed below the second limiting groove 72 and is deeper than the second limiting groove 72. The first limiting groove 71 is provided with a sliding portion 73 on a side facing away from the second limiting groove 72 to facilitate easy separation or connection of the elastic limiting member 61 from the pull rod 7.

[0072] When the mold is in the closed state, one end of the elastic limit member 61 is embedded in the first limit groove 71 or the second limit groove 72, and at this time the push plate assembly 6 is fixedly connected to the pull rod 7; when the mold is opened, the push plate assembly 6 drives the elastic limit member 61 to move downward, so that the elastic limit member 61 moves relatively along the sliding portion 73 until the elastic limit member 61 is completely separated from the pull rod 7.

[0073] To facilitate movement of the push plate assembly 6 within the second receiving groove 331, a locking post 35 extending in the mold opening direction is provided between the base plate 33 and the lower mold base 32 in this embodiment. The ends of the locking post 35 are respectively connected to the base plate 33 and the lower mold base 32. A slide 62 is provided on the push plate assembly 6, and the middle portion of the locking post 35 is movably inserted into the slide 62, allowing the push plate assembly 6 to move along the locking post 35.

[0074] Combine Figure 12 and Figure 13To provide guidance between the first and second center inserts 51, 52, this embodiment further includes a fourth center insert 55 above the first center insert 51. A third mounting groove 5112 is defined on one side of the first center insert 51, while a second mounting groove 521 is defined on one side of the second center insert 52. The second mounting groove 521 corresponds to and communicates with the third mounting groove 5112. The fourth center insert 55 is positioned within the third mounting groove 5112 and extends in the mold opening direction. One end of the fourth center insert 55 extends upward and is movably inserted into the second mounting groove 521.

[0075] Combine Figures 11 to 13 A first mounting groove 5111 is further defined on the upper portion of the columnar portion 511 .

[0076] The center insert assembly 5 further includes a third center insert 54 and a first movable member 56. The third center insert 54 is movably disposed in the first mounting groove 5111, and the first movable member 56 is movably disposed in the first center insert 51, with the upper portion of the first movable member 56 slidingly engaged with the third center insert 54. Specifically:

[0077] The third central insert 54 is provided with a first inclined slot 541 extending obliquely along the mold opening direction. Both sides of the third central insert 54 are provided with first guides 542 extending perpendicular to the mold opening direction. Second guides 51111 are provided on the walls of the first mounting slot 5111. These second guides 51111 mate with the first guides 542 in a concave-convex manner, enabling movement of the third central insert 54 perpendicular to the mold opening direction.

[0078] A first inclined sliding block 561 is provided on the upper part of the first movable part 56, and the first inclined sliding block 561 is matched with the first inclined sliding groove 541 in a concave-convex manner. A second inclined sliding block 562 is provided on the lower part of the first movable part 56, and the second inclined sliding block 562 extends obliquely along the mold opening direction, and the second inclined sliding block 562 intersects with the extension direction of the first inclined sliding block 561.

[0079] The lower mold 3 also includes a drive mechanism 8 and a second movable member 9. The drive mechanism 8 can be a pneumatic or hydraulic cylinder. The drive end of the drive mechanism 8 is connected to the second movable member 9, which slides with the lower portion of the first movable member 56. Specifically, the second movable member 9 is provided with a second inclined groove 91 extending obliquely perpendicular to the mold opening direction. The second inclined slider 562 engages with the second inclined groove 91 in a concave-convex manner. The drive mechanism 8 drives the second movable member 9 to move perpendicular to the mold opening direction, thereby driving the first movable member 56 to move in the mold opening direction, forcing the third center insert 54 to retract into or protrude from the sidewall of the first center insert 51.

[0080] When the mold is opened, the third center insert 54 retracts into the side wall of the first center insert 51, thereby enabling the third center insert 54 to be demolded from the product 1; when the mold is closed, the third center insert 54 at least partially protrudes from the side wall of the first center insert 51, and cooperates with the first row insert 242 to form a partial peripheral wall 11 of the product 1.

[0081] Combine Figures 13 to 15 In this embodiment, the connecting piece 53 is configured as a water pipe, which is preferably made of metal material, and the number of the water pipes is set to two.

[0082] The second central insert 52 is provided with a boss 522. Within this boss 522 is an N-shaped first cooling water channel (not shown) and two mounting holes 5221, one on each side of the first cooling water channel. Two water pipes are inserted into the boss 522 and connect to the ends of the first cooling water channel. Sealing rings are installed between the water pipes and the ends of the first cooling water channel to prevent water leakage. Grooves 531 are provided on either side of the water pipes. Fixing pins 57, which are inserted into both the mounting holes 5221 and the grooves 531, securely connect the water pipes to the boss 522, preventing them from separating from the second central insert 52.

[0083] Two second cooling water channels 63 are provided in the push plate assembly 6 . The second cooling water channels 63 are connected to corresponding water pipes. The two second cooling water channels 63 are used for water inlet and water outlet, respectively.

[0084] In order to achieve uniform cooling of the first central insert 51, a third cooling water channel 513 and two fourth cooling water channels 514 are further provided in the first central insert 51. The third cooling water channel 513 and the fourth cooling water channel 514 both extend along the height direction of the first central insert 51. Specifically:

[0085] The water inlet and outlet of the third cooling water channel 513 are both arranged on the base portion 512. The third cooling water channel 513 is arranged on the side where the fourth center insert 55 is located. The third cooling water channel 513 is arranged below the fourth center insert 55 and as close to the fourth center insert 55 as possible.

[0086] The water inlet and outlet of each fourth cooling water channel 514 are both arranged on the base portion 512, the middle portion of each fourth cooling water channel 514 extends upward to the upper portion of the columnar portion 511, and the two fourth cooling water channels 514 are respectively arranged on both sides of the first mounting groove 5111 to ensure that the first center insert 51 can be cooled evenly and quickly.

[0087] Combine Figure 4 、 Figure 15 、 Figure 18 and Figure 20 , the mold opening sequence of this embodiment is:

[0088] First mold opening: The mold is opened between the top plate 21 and the upper mold base 22, and the upper mold core 23 is demoulded from the product 1. At the same time, the top plate 21 drives the inclined rod to move, thereby driving the slide assembly 24a away from the product 1 in the vertical mold opening direction, thereby realizing the demoulding of the slide insert and the product 1;

[0089] At the same time, the driving device 8 drives the second movable block to move in the vertical mold opening direction, thereby driving the first movable block to move downward in the vertical mold opening direction, thereby driving the third center insert 54 to retract into the first center insert 51, thereby achieving demolding of the third center insert 54 and the product 1;

[0090] Second mold opening: The mold between the upper mold base 22 and the lower mold plate 31 is opened, driving the slide assembly 24a to move along the mold opening direction to make enough space for removing the product 1;

[0091] The third mold opening process is as follows: the mold is opened between the lower mold plate 31 and the lower mold base 32. First, the lower mold base 32 moves the first center insert 51 downward by a first preset distance. During this process, the first center insert 51 is first demolded from the product 1 and simultaneously separates from the second center insert 52. Then, the lower mold base 32 continues to move downward, driving the push plate assembly 6 downward together, and driving the second center insert 52 downward via the connecting member 53, so that the second center insert 52 is demolded from the product 1. After this, the product 1 can be removed.

[0092] In summary, the present invention forms a cavity inside the molding product 1 by setting a center insert assembly 5; and sets a second center insert 52 detachably on the upper end of the first center insert 51. When the mold is opened, the first center insert 51 is first separated from the second center insert 52, and then the second center insert 52 and the first center insert 51 are synchronously moved to demold, so that the center insert assembly 5 is separated from the product 1 in batches. On the one hand, it is beneficial to reduce the demolding force. On the other hand, the second center insert 52 can be used to temporarily fix the product 1 to prevent the product 1 from moving with the first center insert 51, thereby ensuring successful demolding. It is particularly suitable for products 1 with deep cavity structures. In addition, the present invention does not require the setting of ejector plates, ejectors and mold feet. Compared with existing molds, it can reduce the overall height of the mold and reduce the mold volume, thereby facilitating the selection of injection molding machines with smaller tonnage for injection molding production, thereby saving production costs.

[0093] Finally, it should be emphasized that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various changes and modifications. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mold, comprising an upper mold and a lower mold, characterized in that: The lower mold includes, from top to bottom: A lower template, wherein a lower mold core is provided on the lower template; a lower die base, wherein a center insert assembly is provided on the lower die base, the center insert assembly comprising a first center insert, a second center insert, and a connecting piece; one end of the first center insert upwardly passes through the lower die plate and the lower die core and extends into the upper die; the second center insert is detachably provided at the upper end of the first center insert; the first end of the connecting piece is connected to the second center insert; the middle portion of the connecting piece is movably inserted into the first center insert; a cavity is formed between the upper die, the lower die core, and the center insert assembly; at least a portion of the bottom wall of the cavity is provided on the lower die core; When the mold is opened, the lower mold base moves away from the lower mold plate along the mold opening direction, first driving the first center insert to move a first preset distance relative to the lower mold core, the second center insert and the connecting member, and then the connecting member drives the second center insert to move along the mold opening direction along with the first center insert.

2. The mold according to claim 1, characterized in that: The lower mold further includes a bottom plate, a push plate assembly and a pull rod, wherein the bottom plate is connected below the lower mold base, the push plate assembly is movably arranged on the bottom plate and connected to the second end of the connecting member, the lower end of the pull rod is detachably connected to the push plate assembly, and the upper end of the pull rod passes through the lower mold base and is connected to the lower mold plate; When the mold is opened, the lower mold base and the bottom plate are first moved downward along the mold opening direction by the first preset distance so that the lower mold base abuts against the push plate assembly, and then the lower mold base pushes the push plate assembly and the connecting member to move downward together.

3. The mold according to claim 2, characterized in that: The connecting piece is a water pipe, and the number of the connecting pieces is set to two; A first cooling water channel and a fixing pin are provided in the second center insert. The two ends of the first cooling water channel are respectively connected to the two water pipes, and the upper ends of the water pipes are connected to the second center insert through the fixing pins. A second cooling water channel is provided in the push plate assembly, and the lower end of the water pipe is connected to the second cooling water channel.

4. The mold according to claim 2, characterized in that: An elastic limiting member is provided in the push plate assembly, and the lower end of the pull rod is detachably connected to the elastic limiting member.

5. The mold according to claim 1, characterized in that: The center insert assembly further includes a third center insert and a first movable member, wherein a first mounting groove is defined on an upper portion of the first center insert, the third center insert is movably disposed in the first mounting groove, the first movable member is movably disposed in the first center insert, and an upper portion of the first movable member is slidably engaged with the third center insert; The lower mold also includes a driving device and a second movable part, which is slidably engaged with the lower part of the first movable part. The driving device can drive the second movable part to move along the direction perpendicular to the mold opening, and then drive the first movable part to move along the mold opening direction to force the third center insert to retract into or protrude from the side wall of the first center insert.

6. The mold according to claim 1, characterized in that: The second central insert is provided with a second mounting groove, and the first central insert is further provided with a third mounting groove, wherein the second mounting groove is connected to the third mounting groove; The center insert assembly further includes a fourth center insert, which is disposed in the third installation slot. One end of the fourth center insert extends upward and is slidably inserted into the second installation slot.

7. The mold according to claim 1, characterized in that: The upper die includes a top plate, an upper die core, an upper die base, four slide assemblies and a plurality of inclined rods. The upper die base is arranged below the top plate. The upper die base is provided with a first receiving groove. The upper die core is arranged on the top plate and corresponds to the first receiving groove. The four slide assemblies are enclosed in the first receiving groove. The central insert assembly is arranged between the four slide assemblies. The first end of the oblique rod is connected to the top plate, and the second end of the oblique rod is cooperatively connected to the slide assembly. The oblique rod can force the slide assembly to move along the vertical mold opening direction.

8. The mold according to claim 7, characterized in that: The slider assembly includes a slider and a slider insert, the slider insert is connected to the side of the slider facing the central insert assembly, the side wall of the slider insert constitutes the cavity wall of the mold cavity, and an oblique hole is provided on the upper portion of the slider; The first end of the oblique rod is fixedly connected to the top plate through a fixing block, and the second end of the oblique rod is movably inserted into the oblique hole. An elastic member is provided in the oblique hole, and one end of the elastic member elastically abuts against the fixing block.

9. The mold according to claim 8, characterized in that: The upper mold core is provided with a raised portion; A groove portion is provided on the slide insert, and the protrusion portion can be matched with the groove portion in a concave-convex manner.

10. The mold according to claim 8, characterized in that: A buckle assembly is further provided between the upper die and the lower die, and the buckle assembly includes a wedge block and a pull block; A sliding groove is provided on the bottom wall of the slide assembly, and the wedge block is arranged in the sliding groove; The first end of the pulling block is movably arranged in the sliding groove and can be clamped with the wedge block, and the second end of the pulling block passes through the lower template and is fixedly connected to the lower mold base.

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