Core pulling mechanism

Abstract

A core-pulling mechanism is applied to a mold which comprises a male mold and a female mold and is matched with the male mold and the female mold in a mold closing direction, the core-pulling mechanism comprises a mounting seat, a sliding seat and a plurality of core-pulling insert cores, the mounting seat is connected with the female mold, the mounting seat is provided with a mounting cavity and a mounting hole communicated with the mounting cavity, and the sliding seat is arranged in the mounting cavity and extends out of the mounting hole; an inclined sliding face is arranged on the side, away from the mounting hole, of the sliding base, the included angle between the sliding face and the mold closing direction is an obtuse angle, a plurality of sliding holes formed at intervals are formed in the sliding base, and the sliding holes extend to the end, extending out of the mounting hole, of the sliding base from the sliding face in the direction with a preset angle relative to the mold closing direction. And the plurality of core-pulling inserts are respectively arranged in the plurality of sliding holes in a sliding and penetrating manner and are in sliding butt joint with the sliding surface, so that the core-pulling inserts are matched with the male mold to form a plurality of structural characteristics of a product when the male mold and the female mold are closed, and are driven by the sliding seat to simultaneously withdraw from the product when the male mold and the female mold are opened. The core-pulling mechanism can be used for forming a plurality of structural characteristics of a product at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of molding dies, and in particular to a core pulling mechanism. Background Art

[0002] At present, when a product is formed by a forming mold such as an injection mold or an extrusion mold, a core pulling mechanism is usually used in conjunction with the forming mold to form the structural features of the product. However, when the product has more structural features, the number of core pulling inserts of the core pulling mechanism increases accordingly. The current core pulling mechanism cannot accommodate multiple core pulling inserts in a limited space, and cannot make multiple core pulling inserts withdraw from the formed product at the same time, so it is impossible to form multiple structural features of the product at the same time. Utility Model Content

[0003] In view of the above, it is necessary to propose a core pulling mechanism that can simultaneously mold multiple structural features of a product.

[0004] The embodiment of the present application provides a core pulling mechanism, which is applied to a mold including a male mold and a female mold, wherein the male mold and the female mold are adapted to be molded together along a mold closing direction, and the core pulling mechanism includes a mounting seat, a slide seat, and a plurality of core pulling inserts; the mounting seat is used to connect with the female mold, the mounting seat has a mounting cavity and is provided with a mounting hole connected to the mounting cavity, and the mounting hole and the mounting cavity are sequentially arranged along the mold closing direction; the slide seat is arranged in the mounting cavity and extends out of the mounting hole, and the side of the slide seat away from the mounting hole has an inclined sliding surface, and the sliding surface is connected to the The angle between the mold closing directions is an obtuse angle, and a plurality of sliding holes arranged at intervals are provided on the slide seat, and the plurality of sliding holes respectively extend from the sliding surface to one end of the slide seat extending out of the mounting hole along a direction with a preset angle between the mold closing direction; a plurality of core pullers are respectively slidably penetrated through the plurality of sliding holes and slidably abut against the sliding surface, and are used to cooperate with the male mold to form multiple structural features of the product when the male mold and the female mold are closed, and are used to simultaneously withdraw the product driven by the slide seat when the male mold and the female mold are opened.

[0005] The core-pulling mechanism of the embodiment of the present application is configured by arranging a slide in the mounting cavity of the mounting seat and extending out of the mounting hole of the mounting seat, arranging a sliding surface on the side of the slide away from the mounting hole, and providing a plurality of sliding holes on the slide that are arranged at intervals and extend from the sliding surface to one end of the slide extending out of the mounting hole, and arranging a plurality of core-pulling inserts that slide through the plurality of sliding holes and slide against the sliding surface, so that the core-pulling mechanism of the embodiment of the present application can accommodate a plurality of core-pulling inserts at the same time in a limited space, and when the male and female molds of the mold are opened, the plurality of core-pulling inserts slide on the sliding surface driven by the slide and exit the product at the same time. In this way, the core-pulling mechanism of the embodiment of the present application can simultaneously mold multiple structural features of the product.

[0006] In some embodiments, each of the core-pulling inserts includes a core-pulling component and a rolling component; the core-pulling component includes a core-pulling portion and a stop portion connected to one end of the core-pulling portion, the core-pulling portion is slidably passed through the corresponding sliding hole, and the stop portion is stopped by the sliding surface; the rolling component is rotatably arranged on the stop portion and slidably abuts against the sliding surface.

[0007] In some embodiments, the size of the cross-section of the end of the core-pulling part close to the sliding surface is larger than the size of the cross-section of the end of the core-pulling part away from the sliding surface, and a limiting step is formed at the connection between the end of the core-pulling part close to the sliding surface and the end of the core-pulling part away from the sliding surface, and an annular protrusion is convexly provided on the inner wall of the end of each sliding hole away from the sliding surface, and the annular protrusion is used to stop the limiting step to limit the sliding distance of the core-pulling part in the corresponding sliding hole.

[0008] In some embodiments, the extension directions of the plurality of sliding holes are perpendicular to the sliding surface, the core-pulling portion is perpendicular to the stop portion and connected to the middle portion of the stop portion, and the rolling elements are plurality and respectively arranged at both ends of the stop portion.

[0009] In some embodiments, the sliding surface is an annular surface, and the plurality of sliding holes are arranged in an annular array with the central axis of the sliding surface as the center.

[0010] In some embodiments, the slide seat includes a plurality of assemblies stacked in sequence along the mold closing direction, the plurality of assemblies are arranged in the mounting cavity, and an outermost assembly among the plurality of assemblies extends out of the mounting hole, the sliding surface is arranged on a side of an assembly away from the mounting hole that is away from the mounting hole, and the plurality of sliding holes pass through the plurality of assemblies in sequence.

[0011] In some embodiments, a positioning protrusion is provided at one end of the slide seat extending out of the mounting hole, and the positioning protrusion is used to be inserted into the male mold to position the slide seat relative to the male mold.

[0012] In some embodiments, the core pulling mechanism also includes an extrusion assembly and an elastic member; the extrusion assembly is slidably arranged in the mounting cavity along the mold closing direction and abuts against a side of the plurality of core pulling inserts away from the mounting holes; the two ends of the elastic member are respectively connected to the inner wall of the mounting cavity and a side of the extrusion assembly away from the plurality of core pulling inserts, so as to drive the extrusion assembly to elastically extrude the plurality of core pulling inserts.

[0013] In some embodiments, the extrusion assembly includes an extrusion member and a flexible member; the extrusion member abuts against one end of the elastic member close to the multiple core-pulling inserts; the flexible member is arranged between the extrusion member and the multiple core-pulling inserts and abuts against the extrusion member and the multiple core-pulling inserts respectively.

[0014] In some embodiments, the core pulling mechanism also includes a limiting member, which includes a connecting portion and a limiting portion connected to one end of the connecting portion, the connecting portion is slidably penetrated through the mounting seat, and one end of the connecting portion away from the limiting portion extends into the mounting cavity and is connected to the extrusion assembly, and the limiting portion stops at the mounting seat to limit the extrusion force of the elastic member driving the extrusion assembly to elastically extrude the multiple core pulling inserts. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the core pulling mechanism provided in an embodiment of the present application.

[0016] Figure 2 yes Figure 1 The core pulling mechanism shown is a schematic cross-sectional view along the II-II direction.

[0017] Figure 3 yes Figure 1 Schematic diagram of the exploded structure of the core pulling mechanism shown.

[0018] Figure 4 yes Figure 3 Schematic diagram of the exploded structure of the slide in the core pulling mechanism shown.

[0019] Figure 5 yes Figure 3 The three-dimensional structural schematic diagram of the core pulling insert in the core pulling mechanism is shown.

[0020] Main component symbols

[0021] Core pulling mechanism 100

[0022] Mounting Block 10

[0023] Base 11

[0024] Mounting slot 111

[0025] Perforation 112

[0026] Connection hole 113

[0027] Cover 12

[0028] Mounting hole 121

[0029] Mounting cavity 13

[0030] Slide 20

[0031] First assembly 21

[0032] Sliding surface 211

[0033] Second assembly 22

[0034] Third assembly 23

[0035] Fourth assembly 24

[0036] Positioning protrusion 241

[0037] Sliding hole 25

[0038] First paragraph 251

[0039] Second paragraph 252

[0040] Section 3 253

[0041] Ring protrusion 2531

[0042] Section 4 254

[0043] Support hole 26

[0044] Pull core into the sub 30

[0045] Core pulling parts 31

[0046] Core pulling part 311

[0047] Limiting step 3111

[0048] Storage slot 3112

[0049] Stopper 312

[0050] Rolling element 32

[0051] Support member 40

[0052] Extrusion assembly 50

[0053] Extrusion 51

[0054] Flexible parts 52

[0055] Elastic member 60

[0056] Limit 70

[0057] Connecting portion 71

[0058] Limiting section 72 DETAILED DESCRIPTION

[0059] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0060] In the description of the present application, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, it should be noted that the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0061] In the description of the present application, it should be noted that, unless otherwise clearly specified and limited, the term "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication, it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. Some embodiments of the present application will be described in detail below in conjunction with the accompanying drawings.

[0062] See also Figure 1 , the embodiment of the present application provides a core pulling mechanism 100, which is applied to a mold (not shown) including a male mold (not shown) and a female mold (not shown) to simultaneously mold multiple structural features of a product. Among them, the mold can be an injection mold, an extrusion mold, etc., the product can be an injection molded part, a rubber part, etc., and the multiple structural features can be assembly holes, assembly grooves, etc. on the product. For ease of understanding and explanation, the embodiment of the present application takes the mold as an injection mold, the product as an injection molded part, the multiple structural features as multiple assembly holes on the product, the male mold and the female mold of the mold are adapted to be closed along the closing direction, and the closing direction is Figure 1 The Z-axis direction is taken as an example for explanation. Obviously, this is not a limitation of the embodiments of the present application.

[0063] See also Figure 1 , Figure 2 and Figure 3In the embodiment of the present application, the core pulling mechanism 100 includes a mounting seat 10, a sliding seat 20 and a plurality of core pulling inserts 30.

[0064] The mounting seat 10 is connected to the female mold. The mounting seat 10 has a mounting cavity 13 and is provided with a mounting hole 121 communicating with the mounting cavity 13. The mounting hole 121 and the mounting cavity 13 are sequentially arranged along the mold closing direction.

[0065] The slide 20 is arranged in the mounting cavity 13 and extends out of the mounting hole 121. The side of the slide 20 away from the mounting hole 121 has an inclined sliding surface 211, and the angle between the sliding surface 211 and the mold closing direction is an obtuse angle. A plurality of sliding holes 25 arranged at intervals are opened on the slide 20, and the plurality of sliding holes 25 extend from the sliding surface 211 to one end of the slide 20 extending out of the mounting hole 121 along a direction having a preset angle with the mold closing direction.

[0066] A plurality of core-pulling inserts 30 are respectively slidably penetrated through the plurality of sliding holes 25 and slidably abut against the sliding surface 211. The plurality of core-pulling inserts 30 are used to cooperate with the male mold to form a plurality of structural features of the product when the male mold and the female mold are closed, and are used to simultaneously eject the product under the drive of the slide seat 20 when the male mold and the female mold are opened.

[0067] Specifically, the cross-sectional dimensions of the plurality of sliding holes 25 are slightly larger than the cross-sectional dimensions of the corresponding core-pulling inserts 30. The plurality of core-pulling inserts 30 are slidably arranged through the plurality of sliding holes 25 and are loosely matched with the corresponding sliding holes 25. The mounting seat 10 is connected to the springboard (not shown) of the female mold. When the male mold and the female mold are closed, the plurality of core-pulling inserts 30 cooperate with the mold core (not shown) of the male mold to form the plurality of structural features of the product. When the male mold and the female mold are opened, the springboard of the female mold drives the mounting seat 10 away from the male mold in the closing direction, and the sliding seat 20 drives the plurality of core-pulling inserts 30 away from the mold core of the male mold. The plurality of core-pulling inserts 30 slide on the sliding surface 211 and simultaneously exit the product.

[0068] In this embodiment, the mounting seat 10 includes a seat body 11 and a cover 12, the seat body 11 is connected to the springboard of the mother mold, a mounting groove 111 is provided on the side of the seat body 11 away from the mother mold, the cover 12 is covered on the seat body 11 and closes the mounting seat 10, the cover 12 and the inner wall of the mounting groove 111 are enclosed to form a mounting cavity 13, and the mounting hole 121 is provided in the cover 12 and communicates with the mounting cavity 13. In this way, it is convenient to open the mounting seat 10 to disassemble and assemble the slide seat 20 and the plurality of core pullers 30.

[0069] Please refer to Figure 4In this embodiment, the slide 20 includes a plurality of assemblies stacked in sequence along the mold closing direction, the plurality of assemblies are arranged in the mounting cavity 13, and one of the plurality of assemblies located at the outermost side extends out of the mounting hole 121, the sliding surface 211 is arranged on the side of an assembly away from the mounting hole 121 away from the mounting hole 121, and the plurality of sliding holes 25 pass through the plurality of assemblies in sequence. Since the plurality of sliding holes 25 provided on the slide 20 are relatively long, it is inconvenient to process the plurality of sliding holes 25 by a numerical control machine tool. By setting the slide 20 to include a plurality of assemblies stacked in sequence along the mold closing direction, different parts of each sliding hole 25 can be processed on the plurality of assemblies respectively. When the core pulling mechanism 100 is assembled, the plurality of assemblies are smoothly connected in sequence to form the slide 20. In this way, the convenience of processing the plurality of sliding holes 25 on the slide 20 is improved.

[0070] In this embodiment, there are four assemblies, and the four assemblies are respectively a first assembly 21, a second assembly 22, a third assembly 23 and a fourth assembly 24 which are stacked in sequence along the mold closing direction. The fourth assembly 24 extends out of the mounting hole 121, and the sliding surface 211 is arranged on the side of the first assembly 21 away from the second assembly 22. Each sliding hole 25 includes a first section 251, a second section 252, a third section 253 and a fourth section 254 which are respectively opened on the first assembly 21, the second assembly 22, the third assembly 23 and the fourth assembly 24, and the first section 251, the second section 252, the third section 253 and the fourth section 254 are opposite and connected. In this way, the convenience of processing multiple sliding holes 25 on the slide 20 is improved.

[0071] In some other embodiments, the number of the plurality of assemblies may also be two, three, five, six, etc., which is not specifically limited in the embodiments of the present application.

[0072] In this embodiment, the sliding surface 211 is an annular surface, and the plurality of sliding holes 25 are arranged in an annular array with the central axis of the sliding surface 211 as the center. In this way, it is convenient to open more sliding holes 25 on the limited size of the slide seat 20 to accommodate more core pullers 30.

[0073] In this embodiment, the number of the sliding holes 25 and the core-pulling inserts 30 ranges from 50 to 150.

[0074] In this embodiment, a positioning protrusion 241 is protruded from one end of the slide 20 extending out of the mounting hole 121. The positioning protrusion 241 is used to be inserted into the male mold to position the slide 20 relative to the male mold. Specifically, the positioning protrusion 241 is protruded on the side of the fourth assembly 24 away from the third assembly 23. When the male mold and the female mold are molded together, the positioning protrusion 241 is inserted into the positioning hole (not shown) provided in the mold core of the male mold to position the slide 20 relative to the mold core, thereby facilitating the improvement of the accuracy of the multiple structural features of the product formed by the multiple core inserts 30 and the mold core of the male mold.

[0075] In this embodiment, a support hole 26 extending along the mold closing direction is opened in the middle of the slide 20, and different parts of the support hole 26 are respectively opened on the first assembly 21, the second assembly 22 and the third assembly 23. The sliding surface 211 and the plurality of sliding holes 25 are arranged around the support hole 26. A through hole 112 which is connected to the installation cavity 13 and opposite to the support hole 26 is opened on the side of the seat body 11 away from the cover 12. The core pulling mechanism 100 also includes a support member 40, which is columnar. The support member 40 passes through the through hole 112 and the support hole 26 and is connected to the side of the fourth assembly 24 facing the third assembly 23. The support member 40 abuts against the inner wall of the support hole 26 and supports the first assembly 21, the second assembly 22 and the third assembly 23, thereby facilitating the accuracy of assembling the plurality of assemblies of the slide 20 and facilitating the structural strength of the slide 20 after assembly.

[0076] Please refer to further Figure 5 In this embodiment, each core-pulling insert 30 includes a core-pulling member 31 and a rolling member 32. The core-pulling member 31 includes a core-pulling portion 311 and a stopper portion 312 connected to one end of the core-pulling portion 311. The core-pulling portion 311 is slidably arranged in the corresponding sliding hole 25, and the stopper portion 312 is stopped at the sliding surface 211; the rolling member 32 is rotatably arranged at the stopper portion 312 and is in sliding contact with the sliding surface 211. Among them, the rolling member 32 can be a roller. When the male mold and the female mold are opened, the rolling member 32 rolls on the sliding surface 211 and drives the core-pulling member 31 to withdraw from the molded product. Since the rolling member 32 is in linear contact with the sliding surface 211, the friction between the core-pulling insert 30 and the sliding surface 211 is reduced, thereby reducing the probability of the core-pulling insert 30 being stuck with the slide seat 20 when withdrawing from the molded product.

[0077] In this embodiment, the extension directions of the plurality of sliding holes 25 are perpendicular to the sliding surface 211, and the preset angles between the extension directions of the plurality of sliding holes 25 and the mold closing direction are all acute angles of the same size, the core-pulling portion 311 is perpendicular to the stopper portion 312 and connected to the middle of the stopper portion 312, and the rolling elements 32 are multiple and are respectively arranged at both ends of the stopper portion 312. Since the core-pulling portion 311 extends along the extension direction of the sliding hole 25, the stopper portion 312 is parallel to the sliding surface 211, and when the plurality of rolling elements 32 support the stopper portion 312 and drive the core-pulling portion 311 to exit the molded product through the stopper portion 312, the probability of the core-pulling portion 311 being tilted can be effectively reduced, thereby improving the accuracy of the rolling element 32 driving the core-pulling member 31 to exit the molded product.

[0078] In this embodiment, the cross-sectional dimension of the end of the core-pulling part 311 close to the sliding surface 211 is larger than the cross-sectional dimension of the end of the core-pulling part 311 away from the sliding surface 211, and a limiting step 3111 is formed at the connection between the end of the core-pulling part 311 close to the sliding surface 211 and the end of the core-pulling part 311 away from the sliding surface 211, and an annular protrusion 2531 is convexly provided on the inner wall of the end of each sliding hole 25 away from the sliding surface 211, and the annular protrusion 2531 is used to stop the limiting step 3111 to limit the sliding distance of the core-pulling part 311 in the corresponding sliding hole 25. In this way, the length of the core-pulling part 311 extending out of the end of the corresponding sliding hole 25 away from the sliding surface 211 can be limited, which is conducive to improving the accuracy of the structural characteristics of the product formed by the core-pulling part 311 of the core-pulling part 31 and the male mold.

[0079] In this embodiment, the diameter of the first section 251 of the sliding hole 25 is equal to the diameter of the second section 252, the diameter of the third section 253 of the sliding hole 25 is equal to the diameter of the fourth section 254, the diameter of the third section 253 of the sliding hole 25 is greater than the diameter of the second section 252, and the annular protrusion 2531 is the portion of the third section 253 of the sliding hole 25 that protrudes from the second section 252.

[0080] In the present embodiment, a receiving groove 3112 is provided along the circumference of the core pulling portion 311 at one end of the core pulling portion 311 away from the stop portion 312. The receiving groove 3112 is used to receive debris in the sliding hole 25, thereby helping to reduce the probability of the core pulling portion 311 and the sliding hole 25 getting stuck. In addition, the receiving groove 3112 is also used to receive part of the lubricating liquid added to the sliding hole 25, thereby helping to improve the smoothness of the sliding of the core pulling portion 311 in the sliding hole 25.

[0081] Please refer again Figure 1 , Figure 2 and Figure 3In this embodiment, the core pulling mechanism 100 further includes an extrusion assembly 50 and an elastic member 60. The extrusion assembly 50 is slidably disposed in the mounting cavity 13 along the mold closing direction and abuts against a side of the plurality of core pulling inserts 30 away from the mounting hole 121; the two ends of the elastic member 60 are respectively connected to the inner wall of the mounting cavity 13 and a side of the extrusion assembly 50 away from the plurality of core pulling inserts 30, and the elastic member 60 is used to drive the extrusion assembly 50 to elastically extrude the plurality of core pulling inserts 30. Specifically, the extrusion assembly 50 abuts against the stopper 312 of the core pulling member 31 of the plurality of core pulling inserts 30, and the elastic member 60 may be a spring, and the two ends of the elastic member 60 abut against the bottom wall of the mounting groove 111 and a side of the extrusion assembly 50 away from the plurality of core pulling inserts 30. When the male and female molds are closed, the multiple core-pulling inserts 30 are elastically abutted against the mold core of the male mold and the elastic member 60 is compressed by the extrusion assembly 50, which is conducive to reducing the probability of damaging the core-pulling inserts 30 and the mold core, and is conducive to improving the tightness of the fit between the core-pulling inserts 30 and the mold core. When the male and female molds are opened, the elastic member 60 elastically recovers and drives the extrusion assembly 50 to elastically extrude the multiple core-pulling inserts 30 toward the sliding surface 211, so that the multiple core-pulling inserts 30 slowly withdraw from the molded product, which is conducive to reducing the probability of damaging the product when the multiple core-pulling inserts 30 withdraw from the molded product.

[0082] In this embodiment, the extrusion assembly 50 includes an extrusion member 51 and a flexible member 52. The extrusion member 51 abuts against one end of the elastic member 60 close to the multiple core pullers 30, and the flexible member 52 is arranged between the extrusion member 51 and the multiple core pullers 30 and abuts against the extrusion member 51 and the multiple core pullers 30 respectively. Specifically, the extrusion member 51 and the flexible member 52 are both annular, and the flexible member 52 is made of soft rubber material. By providing the flexible member 52, the core pullers 31 of the multiple core pullers 30 can be effectively protected when the male mold and the female mold are closed, and the flexible member 52 can also rely on its own elasticity to adjust the position of the multiple core pullers 30 and make the core pullers 30 press against the mold core, thereby improving the tightness of the multiple core pullers 30 and the mold core of the male mold.

[0083] In this embodiment, the core pulling mechanism 100 further includes a limiting member 70, which includes a connecting portion 71 and a limiting portion 72 connected to one end of the connecting portion 71. The seat body 11 of the mounting seat 10 is provided with a connecting hole 113 connected to the mounting cavity 13. The connecting portion 71 is slidably penetrated through the connecting hole 113, and one end of the connecting portion 71 away from the limiting portion 72 extends into the mounting cavity 13 and is connected to the extrusion member 51 of the extrusion assembly 50. The limiting portion 72 stops at the mounting seat 10 to limit the extrusion force of the elastic member 60 driving the extrusion assembly 50 to elastically extrude the multiple core pulling inserts 30. When the male mold and the female mold are molded together, the multiple core pulling inserts 30 abut against the mold core of the male mold and compress the elastic member 60 through the extrusion assembly 50. At this time, the extrusion assembly 50 drives the limiting member 70 to move and causes the limiting portion 72 to disengage from the seat body 11 toward the side of the connecting portion 71. When the male and female molds are opened, the elastic member 60 elastically recovers and drives the extrusion assembly 50 to elastically extrude the multiple core-pulling inserts 30 toward the sliding surface 211, and the extrusion assembly 50 drives the limiting member 70 to move and stops the limiting portion 72 on the seat body 11. The limiting portion 72 limits the extrusion force of the elastic member 60 to drive the extrusion assembly 50 to elastically extrude the multiple core-pulling inserts 30, thereby effectively reducing the probability that the extrusion assembly 50 over-extrudes the multiple core-pulling inserts 30, resulting in the rolling members 32 of the multiple core-pulling inserts 30 being unable to roll on the sliding surface 211.

[0084] In this embodiment, the connection hole 113 is a countersunk hole, and the structure of the connection hole 113 is similar to the structure of the limiting member 70, and the connection portion 71 and the limiting portion 72 of the limiting member 70 can slide in the connection hole 113. In some other embodiments, the connection hole 113 can also be a straight through hole, which is not specifically limited in the embodiment of the present application.

[0085] In summary, the core pulling mechanism 100 of the embodiment of the present application is configured by arranging the slide 20 in the mounting cavity 13 of the mounting seat 10 and extending out of the mounting hole 121 of the mounting seat 10, arranging a sliding surface 211 on the side of the slide 20 away from the mounting hole 121, and providing a plurality of sliding holes 25 arranged at intervals on the slide 20 and extending from the sliding surface 211 to one end of the slide 20 extending out of the mounting hole 121, and arranging a plurality of core pulling inserts 30 respectively slidingly passing through the plurality of sliding holes 25 and slidingly abutting against the sliding surface 211, so that the core pulling mechanism 100 of the embodiment of the present application can accommodate a plurality of core pulling inserts 30 simultaneously in a limited space, and when the male and female molds of the mold are opened, the plurality of core pulling inserts 30 slide on the sliding surface 211 driven by the slide 20 and simultaneously exit the product. In this way, the core pulling mechanism 100 of the embodiment of the present application can simultaneously form a plurality of structural features of the product.

[0086] It is obvious to those skilled in the art that the present application is not limited to the details of the exemplary embodiments described above, and that the present application can be implemented in other specific forms without departing from the spirit or essential features of the present application. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present application.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application has been described in detail with reference to the preferred embodiments, a person of ordinary skill in the art should understand that the technical solution of the present application may be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the present application.

Claims

1. A core pulling mechanism, applied to a mold including a male mold and a female mold, wherein the male mold and the female mold are adapted to be molded together along a mold closing direction, characterized in that: include: A mounting seat, used to connect with the female mold, the mounting seat having a mounting cavity and a mounting hole communicating with the mounting cavity, the mounting hole and the mounting cavity being arranged in sequence along the mold closing direction; A slide seat is arranged in the mounting cavity and extends out of the mounting hole, the slide seat has an inclined sliding surface on a side away from the mounting hole, and the included angle between the sliding surface and the mold closing direction is an obtuse angle, and the slide seat is provided with a plurality of sliding holes arranged at intervals, and the plurality of sliding holes extend from the sliding surface to an end of the slide seat extending out of the mounting hole along a direction having a preset angle with the mold closing direction; A plurality of core-pulling inserts are respectively slidably inserted into the plurality of sliding holes and slidably abut against the sliding surface, and are used to cooperate with the male mold to form a plurality of structural features of the product when the male mold and the female mold are closed, and are used to simultaneously withdraw the product under the drive of the slide seat when the male mold and the female mold are opened.

2. The core pulling mechanism according to claim 1, characterized in that: Each of the core-pulling inserts comprises: A core-pulling member, comprising a core-pulling portion and a stopper connected to one end of the core-pulling portion, wherein the core-pulling portion is slidably arranged in the corresponding sliding hole, and the stopper is stopped at the sliding surface; The rolling element is rotatably arranged on the stopper and is in sliding contact with the sliding surface.

3. The core pulling mechanism according to claim 2, characterized in that: The size of the cross section of the end of the core pulling part close to the sliding surface is larger than the size of the cross section of the end of the core pulling part away from the sliding surface, and a limiting step is formed at the connection between the end of the core pulling part close to the sliding surface and the end of the core pulling part away from the sliding surface, and an annular protrusion is convexly provided on the inner wall of the end of each sliding hole away from the sliding surface, and the annular protrusion is used to stop the limiting step to limit the sliding distance of the core pulling part in the corresponding sliding hole.

4. The core pulling mechanism according to claim 2, characterized in that: The extension directions of the plurality of sliding holes are perpendicular to the sliding surface, the core-pulling portion is perpendicular to the stop portion and connected to the middle portion of the stop portion, and the rolling elements are plurality and respectively arranged at both ends of the stop portion.

5. The core pulling mechanism according to claim 1, characterized in that: The sliding surface is an annular surface, and the plurality of sliding holes are arranged in an annular array with the central axis of the sliding surface as the center.

6. The core pulling mechanism according to claim 1, characterized in that: The slide seat includes a plurality of assemblies stacked in sequence along the mold closing direction, the plurality of assemblies are arranged in the mounting cavity, and an outermost assembly among the plurality of assemblies extends out of the mounting hole, the sliding surface is arranged on a side of an assembly away from the mounting hole, and the plurality of sliding holes pass through the plurality of assemblies in sequence.

7. The core pulling mechanism according to claim 1, characterized in that: A positioning protrusion is protruded from one end of the slide seat extending out of the mounting hole, and the positioning protrusion is used to be inserted into the male mold to position the slide seat relative to the male mold.

8. The core pulling mechanism according to claim 1, characterized in that: The core pulling mechanism also includes: An extrusion assembly is slidably disposed in the installation cavity along the mold closing direction and abuts against a side of the plurality of core pullers away from the installation hole; The elastic member has two ends respectively connected to the inner wall of the installation cavity and a side of the extrusion assembly away from the multiple core-pulling inserts, and is used to drive the extrusion assembly to elastically extrude the multiple core-pulling inserts.

9. The core pulling mechanism according to claim 8, characterized in that: The extrusion assembly comprises: An extrusion member abuts against one end of the elastic member close to the plurality of core-pulling inserts; The flexible member is arranged between the extrusion member and the plurality of core-pulling inserts and is in contact with the extrusion member and the plurality of core-pulling inserts respectively.

10. The core pulling mechanism according to claim 8, characterized in that: The core pulling mechanism also includes a limiting member, which includes a connecting portion and a limiting portion connected to one end of the connecting portion, the connecting portion is slidably penetrated through the mounting seat, and one end of the connecting portion away from the limiting portion extends into the mounting cavity and is connected to the extrusion assembly, and the limiting portion stops at the mounting seat to limit the extrusion force of the elastic member driving the extrusion assembly to elastically extrude the multiple core pulling inserts.

Images