Core pulling structure and mold
By designing a core pulling structure including a plurality of first inlets, second inlets and support seats, the mold sticking problem caused by multiple dense hole positions in injection molding is solved, and the workpiece molding quality is improved and the core pulling is achieved. Reduced external force.
Patent Information
- Application Number
- CN202421104740.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-20
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-05-20
AI Technical Summary
During the injection molding process, multiple densely distributed hole positions can easily cause the mold to stick at the hole positions, which in turn can easily crack, deformation or burr.
A core pulling structure is designed, including a plurality of first inlets, a plurality of second inlets and a support base. By moving the second inlet with respect to the first inlet, the first inlet and the second inlet move relative to each other, so that the first inlet and the second inlet are separated successively when the workpiece is pulled out, reducing the workpiece and the core are pulled out The area where the structure unblocks within the same time.
It effectively reduces the probability of cracking, deformation or burrs during the core extraction process of the workpiece, improves the molding quality of the workpiece, and reduces the core extraction external force of the core extraction structure.
Smart Images
Figure CN222451232U_ABST
Abstract
Description
Technical Field
[0001] The embodiments of the present application relate to the field of injection molding technology, and in particular to a core pulling structure and a mold. Background Art
[0002] When a workpiece has multiple closely spaced holes, the injection mold needs to have an insert for each hole. When multiple inserts are pulled out at the same time, it is easy to cause mold sticking at the hole position, which in turn causes the workpiece to be easily torn, deformed, or produce burrs. Utility Model Content
[0003] In view of this, the present application provides a core pulling structure to improve the molding quality of the workpiece.
[0004] The present application provides a core pulling structure, which includes a plurality of first inserts, a plurality of second inserts and a support seat. The support seat is configured to be installed in a mold, and a first core portion is provided at one end of the first insert. A second core portion is provided at one end of the second insert, and the plurality of first core portions and the plurality of second core portions are respectively configured to form a hole structure of a workpiece. The plurality of first inserts are respectively connected to the support seat, and the plurality of second inserts are respectively connected to the support seat slidably along a first direction, and the first direction is the direction in which the first inserts and the second inserts are pulled away from the workpiece; each first insert is arranged adjacent to at least one second insert.
[0005] The core-pulling structure moves the second plunger relative to the first plunger, and the first plunger and the second plunger move relative to each other, so that the first plunger and the second plunger are separated from the workpiece one after another when the workpiece is core-pulling, that is, the first plunger and the second plunger are not core-pulling at the same time in at least a certain period of time, thereby reducing the area of the workpiece that is released from the core-pulling structure when the core is pulled at the same time in this period. And when the first plunger pulls the core, the second plunger and the workpiece remain relatively still, and each first plunger is arranged adjacent to at least one second plunger, so that when each first plunger pulls the core, at least one second plunger and the workpiece can simultaneously provide support for the first plunger during the movement process, which is conducive to reducing or avoiding the problems of frequent cracking, deformation, and burrs on the workpiece. In addition, the first plunger first pulls the core to release at least part of the adhesion with the workpiece, and the second plunger pulls the core later, reducing the external force of the core-pulling structure.
[0006] In a possible implementation manner, the plurality of second inserts are configured to slide synchronously relative to the plurality of first inserts.
[0007] In the above embodiment, multiple second inserts are pulled out at the same time, which is beneficial for the multiple second inserts to be connected to the support seat in a synchronous sliding manner, which is beneficial for simplifying the structure of the sliding cooperation between the support seat or the multiple first inserts and the multiple second inserts, and is beneficial for reducing the probability of jamming when the multiple second inserts are in relative motion cooperation, which is beneficial for improving the smoothness of core pulling.
[0008] In a possible implementation, a plurality of first inserts and a plurality of second inserts are arranged along the second direction to form M rows, M≥3, the number of first inserts in each row is multiple, and adjacent first inserts and second inserts in each two adjacent rows are staggered along the third direction, and the second direction is perpendicular to the third direction and is perpendicular to the first direction respectively.
[0009] In the above embodiment, the adjacent first inserts and second inserts in every two adjacent rows are staggered along the third direction, and the second inserts can at least provide support for the two first inserts in the adjacent rows, so as to improve the forming quality of the workpiece.
[0010] In a possible implementation manner, the first slots and the second slots in the middle row of three adjacent rows are arranged alternately.
[0011] The first inserts and the second inserts in the middle row of three adjacent rows are arranged alternately, so that a plurality of first inserts are arranged around the second inserts, and the second inserts provide support for the two first inserts in the adjacent rows and the adjacent first inserts in the same row, so as to further improve the forming quality of the workpiece.
[0012] In a possible implementation, the second insert includes a main body and a stopper, and the stopper is arranged on a side of the main body away from the second core. The support seat or the first insert is provided with a slide groove extending parallel to the first direction, and the stopper is slidably arranged in the slide groove. The groove wall of the slide groove is configured to move along the first direction with the second insert until it is stopped by the stopper.
[0013] In the above embodiment, the cooperation between the slide groove and the stopper realizes the relative movement of the second insert relative to the support seat and the first insert, thereby facilitating the initial demoulding of the plurality of first inserts from the workpiece, reducing the probability of cracking, deformation or burrs, and improving the molding quality of the workpiece.
[0014] In a possible embodiment, the support seat includes a support body, a first clamping seat and a second clamping seat; the first insert is slidably arranged on the support body, and the second insert is slidably arranged on the support body; the support body is provided with a first clamping portion protruding to one side, and the first insert is provided with a second clamping portion protruding to one side, the first clamping seat and the second clamping seat are clamped at opposite sides of the first clamping portion along the first direction, and are clamped at opposite sides of the second clamping portion located on the outside of the core pulling structure along the first direction; the support body is provided with a clamping surface, and the second clamping portion of the first insert located on the inner side of the core pulling structure is clamped between the second clamping seat and the clamping surface along the first direction, or is clamped between the second clamping seat and the first clamping seat.
[0015] In the above embodiment, the first insert and the support body are clamped and fixed by the first clamping seat and the second clamping seat at the same time, that is, a plurality of first inserts are fixedly connected to the support seat.
[0016] In a possible embodiment, the support body is provided with a first installation groove and a second installation groove extending through along a first direction, the first insert is slidably arranged in the first installation groove, and the second insert is slidably connected to the second installation groove. The first insert is also provided with a positioning surface, and the positioning surface is stopped by the first clamping portion along the first direction.
[0017] In the above-mentioned embodiment, the support body pre-positions the plurality of first inserts and the plurality of second inserts, so that the plurality of first inserts and the plurality of second inserts can be fixed simultaneously after the first clamping seat and the second clamping seat are connected. In addition, the support body, the first clamping seat and the second clamping seat of the support seat have simple structures, are easy to manufacture, and are easy to assemble. When the first insert is installed to the support seat, the first insert slides along the second installation groove of the support body until the positioning surface abuts against the first clamping portion, so that the plurality of first inserts and the support body are positioned along the first direction, which is convenient for the assembly of the support seat.
[0018] The present application also provides a mold, the mold includes a first template assembly, a second template assembly and a core pulling structure, the first template assembly and the second template assembly are connected to form a mold cavity, and the core pulling structure is connected to the first template assembly. The core pulling structure includes a plurality of first inserts, a plurality of second inserts and a support seat. A first core portion is provided at one end of the first insert. A second core portion is provided at one end of the second insert, and the plurality of first core portions and the plurality of second core portions are respectively configured to be used in the mold to form a hole structure of a workpiece. A support seat, a plurality of first inserts are respectively connected to the support seat, and a plurality of second inserts are respectively connected to the support seat slidably along a first direction, and the first direction is the direction in which the first insert and the second insert are pulled away from the workpiece. The first core portion and the second core portion are respectively configured to be able to extend into the mold cavity. Each first insert is arranged adjacent to at least one second insert.
[0019] The mold moves relative to the first insert through the second insert, and the first insert and the second insert move relative to each other, so that the area of the workpiece adhering to the core-pulling structure is reduced when the core is pulled out at the same time. When the first insert pulls out the core, the second insert and the workpiece remain relatively still, and each first insert is arranged adjacent to at least one second insert, so that when each first insert pulls out the core, there can be at least one second insert and the workpiece to provide support for the first insert during the movement, which is conducive to reducing or avoiding the problems of cracking, deformation, burrs, etc. of the workpiece. In addition, the first insert pulls out the core first to release at least part of the adhesion with the workpiece, and the second insert pulls out the core later, which reduces the external force of the core-pulling structure and is also conducive to the ejection of the workpiece from the mold.
[0020] In a possible implementation, the second template assembly is provided with a plurality of positioning grooves, the first core is configured to pass through the mold cavity and be inserted into a corresponding positioning groove, and the second core is configured to pass through the mold cavity and be inserted into a corresponding positioning groove.
[0021] In the above embodiment, the groove wall of the positioning groove provides support for the corresponding first core portion, and the groove wall of the positioning groove provides support for the corresponding second core portion, so as to improve the strength of the first core portion and the second core portion during injection molding in the mold cavity, thereby improving the molding quality of the hole of the workpiece.
[0022] In a possible embodiment, the mold further includes an ejector assembly, the ejector assembly includes an ejector seat and a plurality of ejector pins, the plurality of ejector pins are connected to the ejector seat, the ejector seat is slidably connected to the first template assembly, and the plurality of ejector pins are configured to be able to extend into the mold cavity so as to be able to support the molded workpiece in the opposite direction of the first direction.
[0023] In the above embodiment, a plurality of ejectors hold the workpiece in the opposite direction of the first insert and the second insert, which is conducive to automatic demolding of the workpiece. The first insert and the second insert move in opposite directions to the ejectors, which is conducive to improving the demolding efficiency of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 A cross-sectional schematic diagram of a mold provided in an embodiment of the present application.
[0025] Figure 2 for Figure 1 The mold shown is a partial enlarged schematic diagram at II.
[0026] Figure 3 for Figure 1 A schematic diagram of the mold shown with the first template component removed.
[0027] Figure 4 for Figure 3 The shown schematic diagram is a partial enlargement of the mold at position IV.
[0028] Figure 5 for Figure 1 The schematic diagram of the core pulling structure in the mold shown is to remove the first clamping member and the second clamping member.
[0029] Figure 6 for Figure 5 The core pulling structure shown is a schematic diagram from another perspective.
[0030] Figure 7 for Figure 6 A top view schematic diagram of the core pulling structure is shown.
[0031] Figure 8 for Figure 5 A schematic diagram of the supporting body in the core pulling structure is shown.
[0032] Fig. 9 for Figure 5 An exploded schematic diagram of two first inserts and one second insert adjacent to each other along the second direction in the core pulling structure shown.
[0033] Fig.10 To use Figure 1 Schematic diagram of the mold for injection molding a workpiece.
[0034] Main component symbols
[0035] Mould 200
[0036] First template component 2001
[0037] Second template component 2003
[0038] Positioning slot 2031
[0039] Ejector assembly 2005
[0040] Ejector seat 2051
[0041] Ejector 2053
[0042] Core pulling structure 100
[0043] First entry 10
[0044] The second clamping portion 11
[0045] Positioning surface 13
[0046] The first core 101
[0047] Second entry 20
[0048] Main body 21
[0049] Stopper 23
[0050] The second core 201
[0051] Support seat 30
[0052] Support body 31
[0053] Chute 301
[0054] The first clamping portion 311
[0055] Clamping surface 313
[0056] First mounting groove 303
[0057] Second mounting groove 305
[0058] The first clamping seat 33
[0059] Second clamping seat 35
[0060] First direction X
[0061] Second direction Y
[0062] The third direction Z
[0063] Workpiece 300
[0064] Hole 3001
[0065] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION
[0066] In order to further illustrate the technical means and effects adopted by the present application to achieve the intended application purpose, the following is combined with the drawings and implementation methods. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments.
[0067] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.
[0068] Some embodiments of the present application propose a core pulling structure, which includes a plurality of first inserts, a plurality of second inserts and a support seat. A first core portion is provided at one end of the first insert. A second core portion is provided at one end of the second insert, and the plurality of first core portions and the plurality of second core portions are respectively configured to be used in a mold to form a hole structure of a workpiece. A support seat, a plurality of first inserts are respectively connected to the support seat, and a plurality of second inserts are respectively connected to the support seat in a sliding manner along a first direction, and the first direction is the direction in which the first inserts and the second inserts are pulled away from the workpiece.
[0069] The core-pulling structure moves the second insert relative to the first insert, and the first insert and the second insert move relative to each other, so that the area of the workpiece adhering to the core-pulling structure is reduced when the core is pulled at the same time. When the first insert pulls the core, the second insert and the workpiece remain relatively still, and the second insert and the workpiece simultaneously provide support for the first insert during the movement process, which is conducive to reducing or avoiding problems such as cracking, deformation, and burrs that often occur in the workpiece. In addition, the first insert pulls the core first to release at least part of the adhesion with the workpiece, and the second insert pulls the core later, which reduces the external force of the core-pulling structure and is also conducive to ejecting the workpiece from the mold.
[0070] In conjunction with the accompanying drawings, some embodiments of the present application are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.
[0071] Please also see Figure 1 and Figure 2 In one embodiment of the present application, a core pulling structure 100 is provided. The core pulling structure 100 is applied to the formation of a hole 3001 in a workpiece 300 to be injection molded. The workpiece 300 needs to form a plurality of holes 3001, such as Fig.10 shown.
[0072] One embodiment of the present application also provides a mold 200. The mold 200 includes a core pulling structure 100. The core pulling structure 100 includes a plurality of first inserts 10, a plurality of second inserts 20 and a support seat 30. The plurality of first inserts 10 are respectively connected to the support seat 30, and the plurality of second inserts 20 are slidably connected to the support seat 30. The mold 200 also includes a first template assembly 2001 and a second template assembly 2003. The first template assembly 2001 and the second template assembly 2003 are adapted to each other to form a mold cavity. A first core portion 101 is provided at one end of the first insert 10, and a second core portion 201 is provided at one end of the second insert 20. The first core portions 101 of the plurality of first inserts 10 and the second core portions 201 of the plurality of second inserts 20 can be extended into the mold cavity respectively. Injection molding is performed into the mold cavity to mold the workpiece 300, and holes 3001 are formed at the plurality of first core portions 101 and the plurality of second core portions 201 respectively.
[0073] The core-pulling structure 100 moves relative to the first insert 10 through the second insert 20, and the first insert 10 and the second insert 20 move relative to each other, so that the first insert 10 and the second insert 20 are separated from the workpiece 300 successively when the workpiece 300 is core-pulling, that is, the first insert 10 and the second insert 20 are not core-pulling at the same time in at least a certain period of time, thereby reducing the area of the workpiece 300 and the core-pulling structure 100 that is released from adhesion during the core-pulling period; and when the first insert 10 is core-pulling, the second insert 20 and the workpiece 300 remain relatively still, and the second insert 20 and the workpiece 300 simultaneously provide support for the first insert 10 during the movement process, which is conducive to reducing or avoiding the possibility of problems such as cracking, deformation, and burrs of the workpiece 300.
[0074] In addition, the first insert 10 first pulls out the core to release at least part of the adhesion with the workpiece 300, and then the second insert 20 pulls out the core, thereby reducing the external force of the core pulling structure 100.
[0075] In one embodiment, the plurality of second inserts 20 are synchronously slidably disposed on the support seat 30. When the plurality of first inserts 10 are first pulled out for a certain distance, the plurality of second inserts 20 and the first inserts 10 are simultaneously pulled out from the workpiece 300.
[0076] It can be understood that in other embodiments, the support seat 30 or the multiple first inserts 10 are configured to have a structure that slides with different second inserts 20, so that at least two second inserts 20 can also slide relative to each other, so that the multiple second inserts 20 can be cored out in different time periods, that is, the multiple first inserts 10, a part of the multiple second inserts 20, and the other half of the multiple second inserts 20 are successively cored out in a certain same time period, further reducing the area of the workpiece 300 that is released from the multiple first core portions 101 and the multiple second core portions 201 when the workpiece 300 is cored out in the same time period, and when the workpiece 300 is cored out in a certain time period, the part of the second insert 20 that has not been cored out provides support for the other part of the second insert 20 that is being cored out, thereby helping to further reduce or avoid the possibility of the workpiece 300 often having problems such as cracking, deformation, and burrs.
[0077] The simultaneous core pulling of the plurality of second inserts 20 is conducive to the simultaneous sliding connection of the plurality of second inserts 20 to the support seat 30, which is conducive to simplifying the structure of the sliding cooperation between the support seat 30 or the plurality of first inserts 10 and the plurality of second inserts 20, and is conducive to reducing the probability of jamming when the plurality of second inserts 20 are in relative motion cooperation, which is conducive to improving the smoothness of core pulling.
[0078] In one embodiment, when pulling out the core, the plurality of first inserts 10 move with the support seat 30 to first pull out the core. After the first insert 10 moves a set distance relative to the second insert 20, the first insert 10 and the second insert 20 are pulled out at the same time.
[0079] See also Figure 3 and Figure 4 In one embodiment, the mold 200 further includes an ejector assembly 2005. The ejector assembly 2005 includes an ejector seat 2051 and a plurality of ejector pins 2053. The plurality of ejector pins 2053 are connected to the ejector seat 2051. The ejector seat 2051 is slidably connected to the first template assembly 2001. The plurality of ejector pins 2053 are configured to be able to extend into the mold cavity. When the first template assembly 2001 and the second template assembly 2003 are separated, the ejector seat 2051 drives the plurality of ejector pins 2053 to move into the mold cavity, and resists the reverse movement of the workpiece 300 formed in the mold cavity along the first direction X, thereby separating the workpiece 300 from the plurality of first inserts 10, the plurality of second inserts 20 and the second template assembly 2003, thereby achieving demolding of the workpiece 300.
[0080] In one embodiment, a plurality of ejector pins 2053 sequentially pass through the first template component 2001 and the core-pulling structure 100 before entering the mold cavity, but the present invention is not limited thereto. For example, in other embodiments, the outer wall of the first template component 2001 and / or the core-pulling structure 100 is provided with a groove for evading the ejector pins 2053, and the ejector pins 2053 enter the mold cavity through the groove without passing through the interior of the first template component 2001 / the core-pulling structure 100.
[0081] It is understandable that in other embodiments, the second insert 20 and the first insert 10 may move simultaneously with the support seat 30 for a certain distance, and then the ejection assembly 2005 ejects the workpiece 300 to demold the workpiece 300.
[0082] The plurality of ejector pins 2053 hold the workpiece 300 in the reverse direction of the first insert 10 and the second insert 20, which is conducive to automatic demolding of the workpiece 300. The first insert 10 and the second insert 20 move in opposite directions to the ejector pins 2053, respectively, which is conducive to improving the demolding efficiency of the workpiece 300.
[0083] In one embodiment, the second template assembly 2003 is provided with a plurality of positioning grooves 2031. The first core 101 is configured to pass through the mold cavity and be inserted into a corresponding positioning groove 2031. The second core 201 is configured to pass through the mold cavity and be inserted into a corresponding positioning groove 2031. The groove wall of the positioning groove 2031 provides support for the corresponding first core 101, and the groove wall of the positioning groove 2031 provides support for the corresponding second core 201, so as to improve the strength of the first core 101 and the second core 201 during injection molding in the mold cavity, thereby improving the molding quality of the hole 3001 of the workpiece 300.
[0084] It can be understood that in other embodiments, the positioning groove 2031 may also be omitted, and the first core portion 101 and the second core portion 201 are respectively supported on the second template assembly 2003.
[0085] See also Figure 7 and Fig.10 , the workpiece 300 is provided with two groups of holes 3001, each group includes three rows of holes 3001, and the number of holes 3001 in each row is fifteen, but not limited thereto. The sum of the number of the first inserts 10 and the second inserts 20 corresponds to the number of holes 3001 of the workpiece 300. The plurality of first inserts 10 and the plurality of second inserts 20 are divided into two groups corresponding to the holes 3001 of the workpiece 300, each group is distributed along the second direction Y to form three rows, and the number of the second inserts 20 in each group is eight. The second direction Y is perpendicular to the first direction X.
[0086] The adjacent first and second pockets 10 and 20 in each adjacent row are staggered along the third direction Z, which is perpendicular to the first direction X and the second direction Y. The first pockets 10 and the second pockets 20 in each group in the middle row are alternately arranged so that each second pocket 20 surrounds a plurality of first pockets 10. For example, Figure 7 In the dotted frame in the figure, a second insert 20 surrounds six first inserts 10. The second insert 20 provides support for the plurality of first inserts 10 on the surrounding side during core pulling.
[0087] It can be understood that in other embodiments, the second direction Y or the third direction Z may also intersect with the first direction X at an angle of 60°, 70°, 80° or other angles.
[0088] It can be understood that in other embodiments, the plurality of first inserts 10 and the plurality of second inserts 20 can also be arranged to form four rows, five rows or other rows, as long as the plurality of first inserts 10 and the plurality of second inserts 20 are arranged along the second direction Y to form M rows, M≥3, and the adjacent first inserts 10 and second inserts 20 in each two adjacent rows are staggered along the third direction Z, and the second direction Y and the third direction Z are perpendicular and intersect with the first direction X respectively. The first inserts 10 and the second inserts 20 in the middle row of the three adjacent rows are alternately arranged, so that the plurality of first inserts 10 can be arranged around the second inserts 20, and the second inserts 20 provide support for the first inserts 10 on the surrounding side, so as to improve the forming quality of the workpiece 300.
[0089] It can be understood that in other embodiments, when a plurality of first inserts 10 and second inserts 20 are arranged non-staggered along the third direction Z, for example, arranged in parallel, the first inserts 10 and second inserts 20 in each row are arranged alternately, and the first inserts 10 and the second inserts 20 are adjacent to each other along the third direction Z, so that each first insert 10 is arranged adjacent to at least one second insert 20, so that each first insert 10 can be supported by at least one second insert 20 when the core is pulled out.
[0090] It can be understood that in other embodiments, the plurality of first inserts 10 and the plurality of second inserts 20 can also be arranged in a single row. For example, the middle row in each group of three rows is provided with only the second inserts 20 but not the first inserts 10. The second inserts 20 can at least provide support for the four first inserts 10 in the two adjacent rows. The arrangement of the plurality of first inserts 10 and the plurality of second inserts 20 is set according to the arrangement of the plurality of holes 3001 of the workpiece 300.
[0091] Please also see Figure 2 , Figure 5 and Figure 6In one embodiment, the support seat 30 includes a support body 31, a first clamping seat 33 and a second clamping seat 35. The first insert 10 is slidably disposed on the support body 31. The second insert 20 is slidably disposed on the support body 31. The support body 31 is provided with a first clamping portion 311 protruding to one side. The first insert 10 is provided with a second clamping portion 11 protruding to one side. The first clamping seat 33 and the second clamping seat 35 are clamped on opposite sides of the first clamping portion 311 along the first direction X, and are clamped on opposite sides of the second clamping portion 11 of the first insert 10 located on the outside of the M row along the first direction X. The support body 31 is also provided with a plurality of clamping surfaces 313. The clamping surface 313 is located on the side of the support body 31 away from the first clamping portion 311, but is not limited thereto. The second clamping portion 11 of the first insert 10 located on the inside of the M row is clamped between the clamping surface 313 and the second clamping seat 35. The first insert 10 and the support body 31 are clamped and fixed by the first clamping seat 33 and the second clamping seat 35 at the same time, that is, the plurality of first inserts 10 are fixedly connected to the support seat 30 .
[0092] It can be understood that in other embodiments, the clamping surface 313 can also be omitted, and the second clamping portion 11 of the first insert 10 located on each side of the M row extends from the support body 31 to cooperate with the first clamping seat 33 and the second clamping seat 35 to achieve a fixed connection between the first insert 10 and the support seat 30.
[0093] In one embodiment, the support body 31 is provided with a first mounting groove 303 and a second mounting groove 305 extending through the first direction X. Figure 8 As shown. The first insert 10 is slidably disposed in the first mounting groove 303, and the second insert 20 is slidably connected to the second mounting groove 305, so that the first insert 10 and the second insert 20 are respectively slidably connected to the support body 31, so that the first insert 10 and the second insert 20 are first installed with the support body 31, that is, the support body 31 pre-positions the plurality of first inserts 10 and the plurality of second inserts 20, so that the plurality of first inserts 10 and the plurality of second inserts 20 are simultaneously fixed after the first clamping seat 33 and the second clamping seat 35 are connected. In addition, the support body 31, the first clamping seat 33 and the second clamping seat 35 of the support seat 30 have simple structures, are easy to manufacture, and are easy to assemble.
[0094] In one embodiment, the first insert 10 is further provided with a positioning surface 13. Figure 6 and Fig. 9 As shown. The positioning surface 13 is stopped by the first clamping portion 311 along the first direction X. When the first insert 10 is installed to the support seat 30, the first insert 10 slides along the second installation groove 305 of the support body 31 until the positioning surface 13 abuts against the first clamping portion 311, so that the plurality of first inserts 10 and the support body are positioned along the first direction X, which is convenient for the assembly of the support seat 30.
[0095] See also Figure 5 and Fig. 9 The second insert 20 includes a main body 21 and a stopper 23. The stopper 23 is disposed on one side of the main body 21. The support seat 30 is provided with a slide groove 301 extending parallel to the first direction X. The stopper 23 is slidably disposed in the slide groove 301; the groove wall of the slide groove 301 is configured to move along the first direction X with the second insert 20 until it is stopped by the stopper 23. The stopper 23 stops the second insert 20, so that after the second insert 20 moves a certain distance after the first insert 10, it moves synchronously with the first insert 10 along the first direction X, so that the second insert 20 and the first insert 10 are separated from the workpiece 300.
[0096] It can be understood that in other embodiments, a plurality of first inserts 10 and a plurality of second inserts 20 are slidably connected to move asynchronously when driven by an external force. For example, the slide groove 301 is provided on the first insert 10, and the stopper 23 cooperates with the slide groove 301 to realize the relative movement of the first insert 10 and the second insert 20 in a direction parallel to the first direction X.
[0097] The cooperation between the slide groove 301 and the stopper 23 enables the second insert 20 to move relative to the support seat 30 and the first insert 10, thereby facilitating the initial demoulding of the plurality of first inserts 10 from the workpiece 300, reducing the probability of cracking, deformation or burrs, and improving the molding quality of the workpiece 300.
[0098] The mold 200 and the core-pulling structure 100 are moved relative to the first plunger 10 through the second plunger 20, and the first plunger 10 and the second plunger 20 move relative to each other, so that the area of the workpiece 300 adhering to the core-pulling structure 100 is reduced when the core is pulled at the same time; and when the first plunger 10 is pulling the core, the second plunger 20 and the workpiece 300 remain relatively still, and each first plunger 10 is arranged adjacent to at least one second plunger 20, so that each first plunger 10 can have at least one second plunger 20 and the workpiece 300 to provide support for the first plunger 10 during the movement process when the core is pulled, which is conducive to reducing or avoiding the problems of the workpiece 300 often being pulled, deformed, and having burrs. The first plunger 10 first pulls the core to release at least part of the adhesion with the workpiece 300, and the second plunger 20 pulls the core later, reducing the external force of the core-pulling structure 100.
[0099] In addition, those skilled in the art should recognize that the above embodiments are only used to illustrate the present application and are not intended to be limiting of the present application. As long as they are within the spirit and scope of the present application, appropriate changes and modifications to the above embodiments are within the scope of the present application.
Claims
1. A core pulling structure, characterized in that: include: A plurality of first inserts, each of which has a first core at one end; A plurality of second inserts, each of which has a second core at one end, and each of the plurality of first cores and the plurality of second cores is configured to form a hole in a workpiece; each of the first inserts is arranged adjacent to at least one of the second inserts; A support seat, wherein the support seat is configured to be installed in a mold, a plurality of the first inserts are respectively connected to the support seat, and a plurality of the second inserts are respectively connected to the support seat slidably along a first direction, and the first direction is a direction in which the first inserts and the second inserts are pulled away from the workpiece.
2. The core-pulling structure according to claim 1, characterized in that: The plurality of second inserts are configured to slide synchronously relative to the plurality of first inserts.
3. The core-pulling structure according to claim 1, characterized in that: A plurality of the first inserts and a plurality of the second inserts are arranged along a second direction to form M rows, M≥3, the number of the first inserts and the number of the second inserts in each row are respectively multiple, and the adjacent first inserts and the adjacent second inserts in every two adjacent rows are staggeredly arranged along a third direction, and the second direction is perpendicular to the third direction and is perpendicular to the first direction respectively.
4. The core-pulling structure according to claim 3, characterized in that: The first pockets and the second pockets located in the middle row of three adjacent rows are arranged alternately.
5. The core-pulling structure according to any one of claims 1 to 4, characterized in that: The second insert comprises a main body and a stopper, wherein the stopper is arranged on a side of the main body away from the second core; The support seat or the first insert is provided with a slide groove extending parallel to the first direction, and the stopper is slidably arranged in the slide groove; the groove wall of the slide groove is configured to move along the first direction with the second insert until it is stopped by the stopper.
6. The core-pulling structure according to claim 5, characterized in that: The support seat comprises a support body, a first clamping seat and a second clamping seat; the first insert is slidably disposed on the support body, and the second insert is slidably disposed on the support body; The support body is provided with a first clamping portion protruding to one side, the first insert is provided with a second clamping portion protruding to one side, the first clamping seat and the second clamping seat are clamped at two opposite sides of the first clamping portion along the first direction, and are clamped at two opposite sides of the second clamping portion located outside the core-pulling structure along the first direction; The support body is provided with a clamping surface, and the second clamping portion of the first insert located inside the core-pulling structure is clamped between the second clamping seat and the clamping surface along the first direction, or between the second clamping seat and the first clamping seat.
7. The core-pulling structure according to claim 6, characterized in that: The support body is provided with a first mounting groove and a second mounting groove extending through along the first direction, the first insert is slidably disposed in the first mounting groove, and the second insert is slidably connected to the second mounting groove; The first insert is further provided with a positioning surface, and the positioning surface is stopped by the first clamping portion along the first direction.
8. A mold, characterized in that: It includes a first template assembly, a second template assembly and a core pulling structure as described in any one of claims 1 to 7, the first template assembly and the second template assembly are connected to form a mold cavity, the core pulling structure is connected to the first template assembly, and the first core portion and the second core portion are respectively configured to be able to extend into the mold cavity.
9. The mold according to claim 8, characterized in that The second template assembly is provided with a plurality of positioning grooves, the first core is configured to pass through the mold cavity and be inserted into a corresponding positioning groove, and the second core is configured to pass through the mold cavity and be inserted into a corresponding positioning groove.
10. The mold according to claim 8, characterized in that The mold also includes an ejector assembly, which includes an ejector seat and a plurality of ejector pins, wherein the plurality of ejector pins are connected to the ejector seat, and the ejector seat is slidably connected to the first template assembly, and the plurality of ejector pins are configured to be able to extend into the mold cavity so as to be able to resist the formed workpiece in the opposite direction of the first direction.