Injection mold with core pulling mechanism

Abstract

The present invention relates to the technical field of mold opening for injection molding products, and in particular to an injection mold with a core-pulling mechanism. The injection mold with a core-pulling mechanism provided by the present invention comprises a frame, a first seat body and a second seat body that are movably connected; a first mold, which is arranged on the first seat body; a second mold, which is movably connected to the first mold; a molding core, which is movably connected in the second mold, and a snap-on structure is provided at one end of the molding core; a driving structure, which is connected to the second seat body; a transmission structure, one end of which is connected to the power output end of the driving structure, and the other end of which is respectively transmission-connected to the second mold and the molding core. The present invention provides only one driving structure, and the molding core and the second mold can be opened in two directions through the transmission structure. The structure is simple and compact, and occupies little space.

Description

Technical Field

[0001] The invention relates to the technical field of mold opening for injection molding products, and in particular to an injection mold with a core pulling mechanism. Background Art

[0002] When the mold product is opened, in order to ensure the appearance of the product, the molding core needs to move along the extension direction of the product molding part and then separate from the product to avoid damaging the structure of the product. For example, when the side wall of the product has a longitudinal molding part, the molding core needs to move longitudinally along the longitudinal molding part. After the molding core is separated from the longitudinal molding part, it needs to move laterally to move away from the product to facilitate the removal of the product. In the prior art, the longitudinal movement and lateral movement of the molding core are usually achieved respectively by two driving devices. The setting of multiple power sources makes the overall structure of the device more complex and loose, and occupies a larger space. Summary of the invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that the molding core that cooperates with the injection molded product needs to be supported by two driving devices respectively for longitudinal and lateral movement, the structure is numerous and relatively complex and loose, and the space occupied is large, thereby providing an injection mold with a core pulling mechanism with a single power source.

[0004] In order to solve the above problems, the present invention provides an injection mold with a core pulling mechanism, comprising:

[0005] A frame having a first seat body and a second seat body that are movably connected;

[0006] A first mold is arranged on the first base; the first mold is provided with a first cavity;

[0007] A second mold is movably connected to the first mold; the second mold is provided with a second cavity facing the first cavity, the second cavity is movably connected to the first cavity; and a stretching hole is provided on the second cavity;

[0008] A forming core is movably connected in the second mold, one end of the forming core is provided with a buckle structure, and the buckle structure is extended in the second cavity through the extension hole;

[0009] A driving structure connected to the second seat body;

[0010] A transmission structure, one end of which is connected to the power output end of the driving structure, and the other end of which is respectively transmission-connected to the second mold and the forming core;

[0011] When the mold is opened, the transmission structure is suitable for first driving the buckle structure to disengage from the extension hole along the first direction, and then driving the second mold to disengage from the first mold along the second direction; when the mold is closed, the transmission structure is suitable for first driving the buckle structure to reset, and then driving the second mold to reset; there is an angle between the first direction and the second direction.

[0012] Optionally, the transmission structure includes:

[0013] A first transmission block is slidably connected to the first base and connected to a side of the second mold away from the first mold, suitable for driving the second mold to approach or move away from the first mold;

[0014] A second transmission block is slidably connected in the first transmission block, one end of which passes through the second mold and is movably connected to the forming core, and is suitable for driving the forming core to move along the first direction in the second mold, thereby driving the buckle structure to be extended in the extension hole or to be separated from the extension hole;

[0015] When the mold is opened, the driving structure first drives the second transmission block away from the first mold, so that the buckle structure is disengaged from the extension hole, and then the first transmission block and the second transmission block are simultaneously pushed away from the first mold; when the mold is closed, the second transmission block is first pushed close to the first mold to realize the resetting of the buckle structure, and then the first transmission block and the second transmission block are simultaneously pushed close to the first mold.

[0016] Optionally, the first transmission block is provided with a first guide hole obliquely extending along a first direction, and the second transmission block is provided with a second guide hole obliquely extending along the first direction, the second guide hole has the same inclination angle as the first guide hole, and the aperture of the first guide hole is larger than the aperture of the second guide hole;

[0017] The driving structure includes a push rod, which moves along a first direction. The push rod has an inclined rod section, the inclined rod section has the same inclination angle as the first guide hole, and the inclined rod section is slidably extended in the second guide hole and the first guide hole.

[0018] Optionally, the centroids of the longitudinal sections of the first guide hole and the second guide hole gradually approach the second mold in a direction away from the first seat body.

[0019] Optionally, the longitudinal sections of the first guide hole and the second guide hole are both rectangular.

[0020] Optionally, a guide rail is protruded from one end of the second transmission block extending in the second mold; the guide rail comprises a pair of spaced-apart limit plates, a slideway is provided on the limit plates, a centroid of a longitudinal section of the slideway gradually approaches the first seat body in a direction away from the second transmission block, and an end of the slideway away from the second transmission block passes through the limit plate;

[0021] The forming core includes a core body and a pair of sliders arranged on both sides of the core body, and the pair of sliders are respectively slidably matched with a pair of slideways; the snap structure is arranged on the core body at one end away from the first seat body and away from the second transmission block.

[0022] Optionally, the transmission structure further includes a transmission rod, one end of which is connected to the second transmission block, and the other end of which is connected to the guide rail, and the transmission rod is slidably matched with the first transmission block and the second mold respectively.

[0023] Optionally, the second mold is further provided with:

[0024] A protective sleeve is provided with a through slide groove, the transmission rod and the limit plate are both slidably connected in the slide groove, and an end of the molding core away from the first seat body protrudes from the protective sleeve;

[0025] A limit block is arranged in the slide groove at one end close to the forming core and is sandwiched between a pair of limit plates;

[0026] The transmission rod is provided with a first limiting groove which is recessed from one end away from the second transmission block toward the direction close to the second transmission block. The first limiting groove is arranged to penetrate in the first direction, and the first limiting groove is slidably matched with the limiting block.

[0027] Optionally, a positioning block is protruded from a side of the protective cover away from the first seat body;

[0028] The second mold is also provided with an extension groove, the protective cover and the molding core are both arranged in the extension groove, and one end of the extension groove close to the second cavity is connected to the extension hole; the extension groove is provided with a positioning groove, and the positioning block is connected in the positioning groove.

[0029] Optionally, a first limiting rod is provided in the first transmission block along the first direction, and a second limiting groove is provided in the second transmission block along the first direction, and the first limiting rod and the second limiting groove are slidably matched in the second direction; when the buckle structure is disengaged from or extended in the extension hole, the first limiting rod is respectively limitedly abutted against the two side walls of the second limiting groove in the second direction.

[0030] Optionally, an elastic member is provided in the first transmission block, and a clamping slot is provided on the second transmission block, and when the buckle structure is disengaged from the extending hole, the elastic member is clamped in the clamping slot.

[0031] Optionally, it also includes a locking block, which is slidably connected to the side of the first transmission block away from the second mold, moves along the first direction driven by the driving structure, and is suitable for limiting abutment with the first transmission block when the mold is closed.

[0032] Optionally, a first limiting surface is provided on the locking block on the side facing the first transmission block, and the first limiting surface has the same inclination angle as the first guide hole; a second limiting surface is provided on the first transmission block on the side facing the locking block, and the first limiting surface is slidably matched with the second limiting surface.

[0033] Optionally, one end of the second transmission block close to the locking block passes through the first transmission block and is slidably engaged with the locking block;

[0034] The injection mold with the core pulling mechanism also includes a reverse locking block, which is fixedly arranged on the first seat body and located below the locking block, and is suitable for limiting abutment with the locking block in the second direction.

[0035] Optionally, the anti-locking block includes a bottom plate and a side plate, one end of the locking block close to the first seat body is extended on the bottom plate, and a side of the locking block away from the first transmission block is in limiting contact with the side plate.

[0036] Optionally, it also includes a second limiting rod, which is located on the end of the first transmission block away from the second mold and on the side of the locking block; the second limiting rod moves along the first direction driven by the driving structure and slides with the first transmission block, and is suitable for limiting and abutting with the first transmission block when the second transmission block is away from the first mold.

[0037] The present invention has the following advantages:

[0038] 1. The injection mold with a core pulling mechanism provided by the present invention comprises a frame, a first mold, a second mold, a molding core, a driving structure and a transmission structure. Among them, the frame has a first seat body and a second seat body that are movably connected; the first mold is arranged on the first seat body; the first mold is provided with a first cavity; the second mold is movably connected to the first mold; the second mold is provided with a second cavity facing the first cavity, and the second cavity is movably connected to the first cavity; the second cavity is provided with an extension hole; the molding core is movably connected in the second mold, and one end of the molding core is provided with a buckle structure, and the buckle structure is extended in the second cavity through the extension hole; the driving structure is connected to the second seat body; one end of the transmission structure is connected to the power output end of the driving structure, and the other end is transmission-connected to the second mold and the molding core respectively; when opening the mold, the transmission structure is suitable for first driving the buckle structure to disengage from the extension hole in the first direction, and then driving the second mold to disengage from the first mold in the second direction; when closing the mold, the transmission structure is suitable for first driving the buckle structure to reset, and then driving the second mold to reset; there is an angle between the first direction and the second direction.

[0039] When in use, the device has three states: mold closing, injection molding and mold opening. First, the buckle structure of the molding core is driven by the transmission structure to move in the first direction and then extend into the extension hole. Then, the transmission structure drives the second mold to move in the second direction and then abuts against the first mold, so that the second cavity and the first cavity enclose a complete injection cavity, and the mold closing is completed. Then the injection molding process begins. This is the prior art and will not be further described here. Finally, the buckle structure of the molding core is driven by the transmission structure to disengage from the extension hole. Then, the transmission structure drives the second mold to disengage from the first mold, and the mold opening is completed. Among them, the buckle structure is extended in the second cavity to generate an undercut structure on the side wall of the product. In this device, the first direction and the second direction are perpendicular to each other. This device only needs a single power source, and the transmission structure drives the molding core and the second mold to move respectively, thereby realizing the movement of the molding core along the first direction and the movement of the second mold along the second direction in turn. The structure is simple and compact, and it occupies a small space.

[0040] 2. The injection mold with a core-pulling mechanism provided by the present invention has a transmission structure including a first transmission block and a second transmission block. The first transmission block is slidably connected to the first seat body and is connected to the side of the second mold facing away from the first mold, suitable for driving the second mold to approach or move away from the first mold; the second transmission block is slidably connected in the first transmission block, one end of which passes through the second mold and is movably connected to the forming core, suitable for driving the forming core to move along the first direction in the second mold, and then driving the buckle structure to be extended into or out of the extending hole; when opening the mold, the driving structure first drives the second transmission block away from the first mold, so that the buckle structure is out of the extending hole, and then simultaneously pushes the first transmission block and the second transmission block away from the first mold; when closing the mold, the second transmission block is first pushed close to the first mold, so that the buckle structure is reset, and then simultaneously pushes the first transmission block and the second transmission block close to the first mold.

[0041] By first cooperating with the first transmission block through the driving structure, and then cooperating with the first transmission block and the second transmission block at the same time, the first transmission block first drives the forming core to move in the first direction, and then the first transmission block drives the second mold to move in the second direction, thereby achieving a certain time delay between the mold opening action in the first direction and the mold opening action in the second direction, thereby preventing the snap structure from directly escaping from the extension hole in the second direction and thereby damaging the undercut structure on the product.

[0042] 3. The injection mold with a core pulling mechanism provided by the present invention comprises a first transmission block having a first guide hole extending therethrough along a first direction, and a second transmission block having a second guide hole extending therethrough along a first direction. The second guide hole has the same inclination angle as the first guide hole, and the aperture of the first guide hole is larger than the aperture of the second guide hole. The driving structure comprises a push rod, which moves along the first direction. The push rod has an inclined rod section, which has the same inclination angle as the first guide hole, and the inclined rod section is slidably extended into the second guide hole and the first guide hole.

[0043] Since the aperture of the first guide hole is larger than that of the second guide hole, the inclined rod section of the push rod will first push the inner wall of the second guide hole when it moves in the first direction. Since the extension direction of the second guide hole and the movement direction of the inclined rod section have an angle, the second transmission block will move in the second direction driven by the inclined rod section. When the side wall of the second guide hole on one side along the movement direction is coplanar with the side wall on one side of the first guide hole, the side wall of the inclined rod section will slide and cooperate with the side walls of the second guide hole and the first guide hole at the same time, so that the first transmission block and the second transmission block move at the same time, thereby realizing the simultaneous movement of the molding core and the second mold in the second direction. That is, by respectively setting the first guide hole and the second guide hole with different apertures on the first transmission block and the second transmission block, the first transmission block and the first transmission block can move in sequence.

[0044] 4. The injection mold with a core-pulling mechanism provided by the present invention has a guide rail protruding from one end of the second transmission block extending in the second mold; the guide rail includes a pair of limit plates arranged at intervals, and a slide is provided on the limit plate, the centroid of the longitudinal section of the slide gradually approaches the first seat body in the direction away from the second transmission block, and the end of the slide away from the second transmission block passes through the limit plate; the molding core includes a core body and a pair of sliders relatively arranged on both sides of the core body, and the pair of sliders are respectively slidably matched with the pair of slides; the snap structure is arranged on the end of the core body away from the first seat body and away from the second transmission block.

[0045] The movement of the second transmission block along the second direction is converted into the movement of the molding core along the first direction by the sliding cooperation between the slider on the molding core and the slideway on the guide rail, and the abutment cooperation between the molding core and the inner cavity wall of the second mold.

[0046] 5. The injection mold with a core-pulling mechanism provided by the present invention further has a protective cover and a limit block in the second mold. A through slide groove is provided in the protective cover, and the transmission rod and the limit plate are both slidably connected in the slide groove. The end of the molding core away from the first seat body protrudes from the protective cover; the limit block is provided in the slide groove near the end of the molding core and is clamped between a pair of limit plates; the transmission rod is provided with a first limit groove that is recessed from the end away from the second transmission block to the direction close to the second transmission block, and the first limit groove is provided through the first direction, and the first limit groove and the limit block are slidably matched.

[0047] The protective cover provides sliding space for the transmission rod, and cooperates with the first limiting groove through the limiting block to ensure that when the mold is closed, when the guide rail just abuts the inner cavity wall of the second mold, the buckle structure just extends into the extension hole, preventing the guide rail from sliding too much toward the first mold and then hitting the inner cavity wall of the second mold, thereby avoiding damage to the second cavity.

[0048] 6. The injection mold with a core-pulling mechanism provided by the present invention has a positioning block protruding from the side of the protective cover away from the first seat body; an extension groove is also provided in the second mold, and the protective cover and the molding core are both arranged in the extension groove, and the end of the extension groove close to the second cavity is connected to the extension hole; a positioning groove is provided in the extension groove, and the positioning block is connected in the positioning groove.

[0049] By arranging the protective cover and the second mold separately, the processing of the protective cover is more convenient, and at the same time, the positioning block cooperates with the positioning groove, so that the installation and positioning of the protective cover are more convenient and accurate.

[0050] 7. In the injection mold with a core-pulling mechanism provided by the present invention, a first limiting rod is provided in the first transmission block along the first direction, and a second limiting groove is provided in the second transmission block along the first direction, and the first limiting rod and the second limiting groove are slidably matched in the second direction; when the buckle structure is disengaged or extended in the extension hole, the first limiting rod is respectively limitedly abutted against the two side walls of the second limiting groove in the second direction.

[0051] The first limiting rod is fixedly arranged in the first transmission block and extends into the second limiting groove. When the push rod first drives the second transmission block to move, the second limiting groove moves synchronously with the second transmission block until the side wall of the second limiting groove along the movement direction is in contact with the first limiting rod, and the side wall of the second guide hole is coplanar with the side wall of the first guide hole. Then the push rod drives the first transmission block and the second transmission block to move at the same time until the mold is in place or the mold is in place. That is, when the second transmission block finishes moving alone, the first limiting rod is in contact with the second limiting groove to prevent the second transmission block from exceeding the expected position.

[0052] 8. In the injection mold with a core-pulling mechanism provided by the present invention, an elastic member is provided in the first transmission block, and a clamping groove is provided on the second transmission block. When the buckle structure is separated from the extending hole, the elastic member is clamped in the clamping groove.

[0053] When the second transmission block finishes its independent movement during the mold opening process, the buckle structure just disengages from the extension hole, completing the movement of the molding core along the first direction. At this time, the elastic member is elastically engaged in the slot to prevent the second transmission block from exceeding the expected position. When the mold is closed, the second transmission block can be directly moved toward the direction close to the first mold under the drive of the push rod, and the elastic member can be directly disengaged from the slot, and the slot will not hinder the movement of the second transmission block due to the engagement of the elastic member.

[0054] 9. The injection mold with a core pulling mechanism provided by the present invention also includes a locking block, which is slidably connected to the side of the first transmission block away from the second mold, and moves along the first direction driven by the driving structure, and is suitable for limiting abutment with the first transmission block when the mold is closed.

[0055] Since the locking block only moves in the first direction following the driving structure, the locking block will not move in the second direction. The distance between the locking block and the first mold is constant, that is, when the second mold and the first mold are in place, the locking block just abuts against the first transmission block, and the locking block ensures that the first transmission block is in place.

[0056] 10. In the injection mold with a core pulling mechanism provided by the present invention, a first limiting surface is provided on the locking block on the side facing the first transmission block, and the first limiting surface has the same inclination angle as the first guide hole; a second limiting surface is provided on the first transmission block on the side facing the locking block, and the first limiting surface and the second limiting surface are slidably matched.

[0057] Since both the first limiting surface and the second limiting surface are inclined surfaces, when the locking block only moves in the first direction but not in the second direction, space can be provided for the first transmission block to move in the second direction without interfering with the movement of the first transmission block. At the same time, during the mold opening process, when the second transmission block moves alone, the locking block also slides and limits against the first transmission block, ensuring that the first transmission block will not be displaced in the second direction when the second transmission block moves alone, thereby avoiding damage to the undercut structure of the product.

[0058] 11. In the injection mold with a core-pulling mechanism provided by the present invention, one end of the second transmission block close to the locking block passes through the first transmission block and slides with the locking block; the injection mold with the core-pulling mechanism also includes a counter-locking block, which is fixedly arranged on the first seat body and is located below the locking block, and is suitable for limiting abutment with the locking block in the second direction.

[0059] During injection molding, the tension of the expansion of the second cavity may drive the second transmission block to slide toward the locking block. At this time, the locking block is limitedly abutted against the second transmission block in the second direction. By setting the anti-locking block, a supporting force is provided to the locking block in the second direction to prevent the locking block from being lifted up by the second transmission block and flipped over.

[0060] 12. The injection mold with a core pulling mechanism provided by the present invention also includes a second limiting rod, which is located at the end of the first transmission block away from the second mold and is located on the side of the locking block; the second limiting rod moves along the first direction driven by the driving structure and slidably cooperates with the first transmission block, and is suitable for limiting and abutting with the first transmission block when the second transmission block is away from the first mold.

[0061] During the mold opening process, when the push rod drives the second transmission block to move independently, the second limit rod is provided to ensure that the first transmission block does not slip in the second direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0063] Figure 1 The schematic diagram of the structure of the frame of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0064] Figure 2 The schematic structural diagram of the first seat body of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0065] Figure 3A first structural schematic diagram of the connection between a first transmission block, a second mold, and a first mold of an injection mold with a core pulling mechanism provided by the present invention is shown.

[0066] Figure 4 A second structural schematic diagram of the first transmission block, the second mold, and the first mold connected to the injection mold with a core pulling mechanism provided by the present invention is shown.

[0067] Figure 5 A first structural schematic diagram of the connection between a first transmission block and a second mold of an injection mold with a core pulling mechanism provided by the present invention is shown.

[0068] Figure 6 A second structural schematic diagram showing the connection between the first transmission block and the second mold of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0069] Figure 7 A schematic structural diagram of the connection between the second transmission block and the transmission rod of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0070] Figure 8 A first structural schematic diagram of the connection between a transmission rod, a guide rail, a protective sleeve, and a molding core of an injection mold with a core-pulling mechanism provided by the present invention is shown.

[0071] Fig. 9 A second structural schematic diagram of the connection between the transmission rod, the guide rail, the protective sleeve and the molding core of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0072] Fig.10 The schematic structural diagram of the connection between the transmission rod, the guide rail and the molding core of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0073] Fig.11 The schematic diagram of the structure of the transmission rod of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0074] Fig.12 A first structural schematic diagram of a molding core of an injection mold with a core-pulling mechanism provided by the present invention is shown.

[0075] Fig.13 A second structural schematic diagram of a molding core of an injection mold with a core-pulling mechanism provided by the present invention is shown.

[0076] Fig.14 A schematic structural diagram of a protective cover of an injection mold with a core-pulling mechanism provided by the present invention is shown.

[0077] Fig.15 A first structural schematic diagram of a second transmission block of an injection mold with a core-pulling mechanism provided by the present invention is shown.

[0078] Fig.16 A second structural schematic diagram of a second transmission block of an injection mold with a core-pulling mechanism provided by the present invention is shown.

[0079] Fig.17 The schematic structural diagram of the push rod of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0080] Fig.18 A first structural schematic diagram showing the connection between the locking block and the anti-locking block of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0081] Fig.19 A second structural schematic diagram showing the connection between the locking block and the anti-locking block of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0082] Fig. 20 A schematic structural diagram of a first limiting rod of an injection mold with a core pulling mechanism provided by the present invention is shown.

[0083] Fig.21 A schematic structural diagram of an elastic member of an injection mold with a core-pulling mechanism provided by the present invention is shown.

[0084] Fig. 22 The schematic structural diagram of the product of the injection mold with the core pulling mechanism provided by the present invention is shown.

[0085] Description of reference numerals:

[0086] 1. Frame; 11. First seat body; 12. Second seat body; 2. First mold; 21. First cavity; 3. Second mold; 31. Second cavity; 311. Extension hole; 32. Protective cover; 321. Positioning block; 33. Limiting block; 4. Molding core; 41. Buckle structure; 42. Core body; 43. Slider; 5. Transmission structure; 51. First transmission block; 511. First guide hole; 512. First limiting rod; 513. Elastic member; 52. Second transmission block; 521. Second guide hole; 522. Guide rail; 5221. Limiting plate; 5222. Slideway; 523. Second limiting groove; 524. Slot; 53. Transmission rod; 531. First limiting groove; 6. Push rod; 61. Oblique rod section; 7. Locking block; 8. Anti-locking block; 9. Second limiting rod. DETAILED DESCRIPTION

[0087] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0088] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0089] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0090] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0091] This embodiment provides an injection mold with a core pulling mechanism, such as Figures 1 to 22 As shown, it includes a frame 1, a first mold 2, a second mold 3, a forming core 4, a driving structure and a transmission structure 5. Figure 1 As shown, the frame 1 has a first base body 11 and a second base body 12 that are movably connected. Figure 2 As shown, the first mold 2 is arranged on the first seat 11; the first mold 2 is provided with a first cavity 21, specifically, the first mold 2 comprises an insert at the bottom and a core connected to one side above the insert. The second mold 3 is movably connected to the first mold 2, that is, the second mold 3 is connected to the insert and movably connected to the core along the second direction. The second mold 3 is provided with a second cavity 31 facing the first cavity 21, and the second cavity 31 is movably connected to the first cavity 21; the second cavity 31 is provided with an extension hole 311.

[0092] The molding core 4 is movably connected in the second mold 3. A buckle structure 41 is provided at one end of the molding core 4. The buckle structure 41 is extended in the second mold cavity 31 through the extension hole 311. The buckle structure 41 is suitable for the undercut structure on the molded product. The driving structure is connected to the second seat body 12, and the driving structure is not further defined here. One end of the transmission structure 5 is connected to the power output end of the driving structure, and the other end is transmission-connected to the second mold 3 and the molding core 4 respectively.

[0093] When the mold is opened, the transmission structure 5 is suitable for first driving the buckle structure 41 to disengage from the extension hole 311 along the first direction, and then driving the second mold 3 to disengage from the first mold 2 along the second direction; when the mold is closed, the transmission structure 5 is suitable for first driving the buckle structure 41 to reset, and then driving the second mold 3 to reset; there is an angle between the first direction and the second direction. It should be noted that the first direction in this article is Figure 2 The height direction of the first seat body 11 is shown, and the second direction is Figure 2 The length direction of the first seat body 11 shown, that is, the first direction and the second direction are perpendicular to each other.

[0094] When in use, the device has three states: mold closing, injection molding and mold opening. First, the buckle structure 41 of the molding core 4 is driven by the transmission structure 5 to move in the first direction and then extend into the extension hole 311, and then the transmission structure 5 drives the second mold 3 to move in the second direction and then abuts the first mold 2, so that the second cavity 31 and the first cavity 21 are enclosed to form a complete injection cavity, and the mold closing is completed. Then the injection molding process begins, which is a prior art and will not be further described here. Finally, the buckle structure 41 of the molding core 4 is driven by the transmission structure 5 to disengage from the extension hole 311, and then the transmission structure 5 drives the second mold 3 to disengage from the first mold 2, and the mold opening is completed. The device only needs a single power source, and the transmission structure 5 drives the molding core 4 and the second mold 3 to move respectively, thereby realizing the movement of the molding core 4 along the first direction and the movement of the second mold 3 along the second direction in turn. The structure is simple and compact, and the space occupied is small.

[0095] Alternatively, if Figures 3 to 6As shown, the transmission structure 5 includes a first transmission block 51 and a second transmission block 52. The first transmission block 51 is slidably connected to the first base body 11, and is connected to the side of the second mold 3 that is away from the first mold 2, and is suitable for driving the second mold 3 to approach or move away from the first mold 2. Specifically, a pair of rails are provided on the first base body 11, and the first transmission block 51 slides on the pair of rails to ensure that the first transmission block 51 slides along the second direction. The second transmission block 52 is slidably connected in the first transmission block 51, and one end passes through the second mold 3 and is movably connected to the forming core 4, and is suitable for driving the forming core 4 to move in the second mold 3 along the first direction, thereby driving the buckle structure 41 to extend in the extension hole 311 or to disengage from the extension hole 311, so as to achieve the resetting or release of the buckle structure 41.

[0096] When opening the mold, the driving structure first drives the second transmission block 52 away from the first mold 2 along the second direction, so that the snap structure 41 is disengaged from the extension hole 311 along the first direction, and then the first transmission block 51 and the second transmission block 52 are simultaneously pushed away from the first mold 2 along the second direction to complete the mold opening; when closing the mold, the second transmission block 52 is first pushed close to the first mold 2 to realize the resetting of the snap structure 41, and then the first transmission block 51 and the second transmission block 52 are simultaneously pushed close to the first mold 2 until the second mold 3 is abutted against the first mold 2.

[0097] The driving structure first cooperates with the first transmission block 51, and then cooperates with the first transmission block 51 and the second transmission block 52 at the same time, so that the first transmission block 51 first drives the forming core 4 to move along the first direction, and then the first transmission block 51 drives the second mold 3 to move along the second direction, thereby achieving a certain time delay between the mold opening action in the first direction and the mold opening action in the second direction, thereby preventing the buckle structure 41 from directly escaping from the extension hole 311 along the second direction and thereby damaging the undercut structure on the product.

[0098] Optionally, the first transmission block 51 is provided with a first guide hole 511 obliquely extending through the first direction. Figure 15 to Figure 16 As shown, the second transmission block 52 is provided with a second guide hole 521 obliquely penetrating along the first direction, the second guide hole 521 has the same inclination angle as the first guide hole 511, and the aperture of the first guide hole 511 is larger than the aperture of the second guide hole 521. Specifically, the second guide hole 521 is sleeved in the first guide hole 511, and the second guide hole 521 has the same shape as the first guide hole 511.

[0099] like Fig.17As shown, the driving structure includes a push rod 6, which moves along a first direction. The push rod 6 has an inclined rod segment 61, and the inclined rod segment 61 has the same inclination angle as the first guide hole 511, and the inclined rod segment 61 is slidably extended in the second guide hole 521 and the first guide hole 511. The driving structure also includes a host, and the host drives the inclined rod segment 61 to move along the first direction. Further, the push rod 6 also has a straight rod segment, which is connected between the host and the inclined rod segment 61. The straight rod segment extends along the first direction.

[0100] Since the aperture of the first guide hole 511 is larger than that of the second guide hole 521, when the inclined rod section 61 of the push rod 6 moves in the first direction, it will first push the inner wall of the second guide hole 521. Since the extension direction of the second guide hole 521 and the movement direction of the inclined rod section 61 have an angle, the second transmission block 52 will move in the second direction driven by the inclined rod section 61. When the side wall of the second guide hole 521 on one side along the movement direction is coplanar with the side wall of the first guide hole 511, the side wall of the inclined rod section 61 will slide and cooperate with the side walls of the second guide hole 521 and the first guide hole 511 at the same time, so that the first transmission block 51 and the second transmission block 52 move at the same time, thereby realizing the simultaneous movement of the molding core 4 and the second mold 3 in the second direction. That is, by respectively setting the first guide hole 511 and the second guide hole 521 with different apertures on the first transmission block 51 and the second transmission block 52, the second transmission block 52 and the first transmission block 51 can be moved successively.

[0101] Optionally, the centroids of the longitudinal sections of the first guide hole 511 and the second guide hole 521 gradually approach the second mold 3 in a direction away from the first seat body 11. It should be noted that the longitudinal section herein is a surface cut along the length direction of an object.

[0102] Optionally, the longitudinal sections of the first guide hole 511 and the second guide hole 521 are both rectangular. As a convertible embodiment, the longitudinal sections of the first guide hole 511 and the second guide hole 521 can also be circular.

[0103] Alternatively, if Figures 7 to 11 As shown, one end of the second transmission block 52 extending in the second mold 3 is protruded with a guide rail 522; the guide rail 522 includes a pair of spaced-apart limit plates 5221, on which a slideway 5222 is provided, the centroid of the longitudinal section of the slideway 5222 gradually approaches the first seat 11 in a direction away from the second transmission block 52, and the end of the slideway 5222 away from the second transmission block 52 passes through the limit plate 5221. Figure 12 to Figure 13 As shown, the molding core 4 includes a core body 42 and a pair of sliders 43 arranged on both sides of the core body 42, and the pair of sliders 43 are respectively slidably matched with a pair of slideways 5222; the buckle structure 41 is arranged on the core body 42 at one end away from the first seat body 11 and away from the second transmission block 52. Specifically, when the mold is opened, the guide rail 522 slides in a direction away from the first mold 2, and the core body 42 will partially protrude from the limit plate 5221.

[0104] By means of the sliding fit between the slider 43 on the forming core 4 and the slideway 5222 on the guide rail 522, and the abutment fit between the forming core 4 and the inner cavity wall of the second mold 3, the movement of the second transmission block 52 along the second direction is converted into the movement of the forming core 4 along the first direction.

[0105] Optionally, the transmission structure 5 further includes a transmission rod 53, one end of which is connected to the second transmission block 52, and the other end of which is connected to the guide rail 522, and the transmission rod 53 is slidably matched with the first transmission block 51 and the second mold 3. Specifically, the transmission rod 53 and the second transmission block 52 are connected in an I-shaped manner, which is convenient for processing and installation. Further, the transmission rod 53 has a pair, and one of the transmission rods 53 is correspondingly provided with one guide rail 522.

[0106] Alternatively, if Fig.14 As shown, a protective cover 32 and a limit block 33 are also provided in the second mold 3. A through slide groove is provided in the protective cover 32, and the transmission rod 53 and the limit plate 5221 are both slidably connected in the slide groove. The end of the molding core 4 away from the first seat body 11 protrudes from the protective cover 32, that is, the molding core 4 is slidably connected to the side of the protective cover 32 close to the guide rail 522 along the first direction. The limit block 33 is provided in the slide groove close to the molding core 4, and is clamped between a pair of limit plates 5221. A first limit groove 531 is provided on the transmission rod 53, which is recessed from the end away from the second transmission block 52 to the direction close to the second transmission block 52. The first limit groove 531 is provided through the first direction, and the first limit groove 531 is slidably matched with the limit block 33.

[0107] The protective cover 32 provides sliding space for the transmission rod 53, and cooperates with the first limiting groove 531 through the limiting block 33 to ensure that when the mold is closed, when the guide rail 522 just abuts against the inner cavity wall of the second mold 3, the buckle structure 41 just extends into the extension hole 311, preventing the guide rail 522 from sliding too much toward the first mold 2 and then hitting the inner cavity wall of the second mold 3, thereby avoiding damage to the second cavity 31.

[0108] Optionally, a positioning block 321 is protruded from the side of the protective cover 32 facing away from the first seat body 11; an extension groove is also provided in the second mold 3, the protective cover 32 and the molding core 4 are both arranged in the extension groove, and the end of the extension groove close to the second cavity 31 is connected to the extension hole 311; a positioning groove is provided in the extension groove, and the positioning block 321 is connected in the positioning groove. Specifically, the positioning block 321 is a rectangular long block, and the positioning groove corresponds to a rectangular long groove.

[0109] By arranging the protective cover 32 and the second mold 3 separately, the processing of the protective cover 32 is more convenient. At the same time, the positioning block 321 cooperates with the positioning groove, so that the installation and positioning of the protective cover 32 are more convenient and accurate.

[0110] Alternatively, if Fig. 20 As shown, a first limiting rod 512 is provided inside the first transmission block 51 along the first direction, and a second limiting groove 523 is provided inside the second transmission block 52 along the first direction, and the first limiting rod 512 and the second limiting groove 523 are slidably matched in the second direction; when the buckle structure 41 is disengaged from or extended in the extension hole 311, the first limiting rod 512 is respectively in limiting contact with the two side walls of the second limiting groove 523 in the second direction. Further, the first limiting rod 512 has a pair, which are symmetrically arranged on both sides of the second transmission block 52 along the width direction of the first seat body 11, and the second limiting groove 523 has a pair of corresponding ones.

[0111] The first limiting rod 512 is fixedly arranged in the first transmission block 51 and extends into the second limiting groove 523. When the push rod 6 first drives the second transmission block 52 to move, the second limiting groove 523 moves synchronously with the second transmission block 52 until the side wall of the second limiting groove 523 along the movement direction is in limiting contact with the first limiting rod 512, and the side wall of one side of the second guide hole 521 is coplanar with the side wall of one side of the first guide hole 511. Then the push rod 6 drives the first transmission block 51 and the second transmission block 52 to move at the same time until the mold is in place or the mold is in place. That is, when the second transmission block 52 finishes moving alone, the first limiting rod 512 is in limiting contact with the second limiting groove 523 to prevent the second transmission block 52 from exceeding the expected position.

[0112] Alternatively, if Fig.21 As shown, an elastic member 513 is provided in the first transmission block 51, and a clamping groove 524 is provided on the second transmission block 52. When the buckle structure 41 is separated from the extension hole 311, the elastic member 513 is clamped in the clamping groove 524. Further, the elastic member 513 has a pair, which are symmetrically arranged on both sides of the second transmission block 52 along the width direction of the first seat body 11, and the clamping groove 524 has a pair accordingly. Specifically, a conical block is provided on the side of the elastic member 513 facing the second transmission block 52, and the clamping groove 524 is a conical groove correspondingly.

[0113] When the second transmission block 52 finishes its independent movement during the mold opening process, the buckle structure 41 just disengages from the extension hole 311, completing the movement of the molding core 4 along the first direction. At this time, the elastic member 513 is elastically engaged in the engagement groove 524 to prevent the second transmission block 52 from exceeding the expected position. When the mold is closed, the second transmission block 52 can be directly moved toward the direction close to the first mold 2 under the drive of the push rod 6, and the elastic member 513 can be directly disengaged from the engagement groove 524, and the engagement groove 524 will not hinder the movement of the second transmission block 52 due to the engagement of the elastic member 513.

[0114] Alternatively, if Figure 18 to Figure 19 As shown, the injection mold with a core pulling mechanism provided in this embodiment also includes a locking block 7, which is slidably connected to the side of the first transmission block 51 away from the second mold 3, and moves along the first direction driven by the driving structure, and is suitable for limiting and abutting with the first transmission block 51 when the mold is closed.

[0115] Since the locking block 7 only moves in the first direction following the driving structure, the locking block 7 will not move in the second direction, and the spacing between the locking block 7 and the first mold 2 is constant, that is, when the second mold 3 and the first mold 2 are in place, the locking block 7 just abuts against the first transmission block 51, and the locking block 7 ensures that the first transmission block 51 is in place.

[0116] Optionally, a first limiting surface is provided on the locking block 7 on the side facing the first transmission block 51, and the first limiting surface has the same inclination angle as the first guide hole 511; a second limiting surface is provided on the first transmission block 51 on the side facing the locking block 7, and the first limiting surface and the second limiting surface are slidably matched. Furthermore, a matching block is provided on the locking block 7 towards the first transmission block 51, and the matching block is embedded in the locking block 7 and is suitable for slidably matching with the first transmission block 51. By separating the matching block from the locking block 7, when the matching block is worn, it is easy to replace, and the locking block 7 does not need to be replaced as a whole, saving maintenance costs.

[0117] Since both the first limiting surface and the second limiting surface are inclined surfaces, when the locking block 7 moves only in the first direction but not in the second direction, space can be provided for the first transmission block 51 to move in the second direction without interfering with the movement of the first transmission block 51. At the same time, during the mold opening process, when the second transmission block 52 moves alone, the locking block 7 also slides and limits against the first transmission block 51, ensuring that the first transmission block 51 will not be displaced in the second direction when the second transmission block 52 moves alone, thereby avoiding damage to the undercut structure of the product.

[0118] Optionally, one end of the second transmission block 52 close to the locking block 7 passes through the first transmission block 51 and slides with the locking block 7; the injection mold with the core pulling mechanism also includes a counter-locking block 8, which is fixedly set on the first seat body 11 and is located below the locking block 7, and is suitable for limiting and abutting with the locking block 7 in the second direction.

[0119] During injection molding, the tension of the expansion of the second cavity 31 may drive the second transmission block 52 to slide toward the locking block 7. At this time, the locking block 7 is limitedly abutted against the second transmission block 52 in the second direction. By setting the anti-locking block 8, a supporting force is provided to the locking block 7 in the second direction to prevent the locking block 7 from being lifted up by the second transmission block 52 and flipped over.

[0120] Optionally, the anti-locking block 8 includes a bottom plate and a side plate, one end of the locking block 7 close to the first seat body 11 is extended on the bottom plate, and the side of the locking block 7 away from the first transmission block 51 is in limiting contact with the side plate.

[0121] Optionally, the injection mold with a core-pulling mechanism provided in this embodiment further includes a second limiting rod 9, which is located at one end of the first transmission block 51 away from the second mold 3 and at the side of the locking block 7; the second limiting rod 9 moves along the first direction driven by the driving structure and slidably cooperates with the first transmission block 51, and is suitable for limiting and abutting with the first transmission block 51 when the second transmission block 52 is away from the first mold 2. A third limiting groove is provided on the side of the first transmission block 51 away from the first mold 2, and the first transmission block 51 is slidably connected in the third limiting groove. Further, the second limiting rod 9 has a pair, which are symmetrically arranged on both sides of the locking block 7 along the width direction of the first seat body 11, and a pair of third limiting grooves are correspondingly provided.

[0122] During the mold opening process, when the push rod 6 drives the second transmission block 52 to move independently, the second limiting rod 9 is provided to ensure that the first transmission block 51 does not slip in the second direction.

[0123] Device movement process:

[0124] Mould opening:

[0125] The main machine simultaneously drives the push rod 6, the second limit rod 9, and the locking block 7 to move along the first direction away from one end of the first seat body 11, and then the push rod 6 cooperates with the second guide hole 521 to drive the second transmission block 52 to move along the second direction away from the first mold 2, and then the second transmission block 52 drives the transmission rod 53, and the transmission rod 53 drives the forming core 4. During this process, the locking block 7 slides with the second transmission block 52, and the second limit rod 9 slides with the first transmission block 51 until the forming core 4 moves toward one end along the first direction and close to the first seat body 11 until it is separated from the extension hole 311. At this time, the elastic member 513 is engaged in the card slot 524, and the first limit rod 512 and the second limit slot 523 abut against the side wall of the first mold 2 along the second direction to complete the mold opening in the first direction.

[0126] Then the main machine continues to drive the push rod 6, the second limit rod 9, and the locking block 7 to move along the first direction away from one end of the first seat body 11, and the end of the second limit rod 9 close to the first seat body 11 is misaligned with the first transmission block 51, and the locking block 7 also provides an avoidance space for the first transmission block 51 and no longer limits the movement of the first transmission block 51; the push rod 6 simultaneously cooperates with the first guide hole 511 and the second guide hole 521, driving the first transmission block 51 and the second transmission block 52 to move simultaneously toward one end along the second direction and away from the first mold 2, thereby realizing the opening of the first mold 2 and the second mold 3 in the second direction.

[0127] Mould closing:

[0128] The main machine simultaneously drives the push rod 6, the second limit rod 9, and the locking block 7 to move along the first direction close to one end of the first seat body 11, and the push rod 6 cooperates with the second guide hole 521 to drive the second transmission block 52 to move along the second direction close to the first mold 2, and then the second transmission block 52 drives the transmission rod 53, and the transmission rod 53 drives the forming core 4, and the forming core 4 moves toward one end along the first direction and away from the first seat body 11 until it is extended into the extension hole 311. At this time, the limit block 33 in the protective cover 32 is limitedly abutted against the transmission rod 53, and the first limit rod 512 abuts against the side wall of the second limit groove 523 on the side away from the first mold 2 in the second direction to complete the mold closing in the first direction.

[0129] The main machine continues to drive the push rod 6, the second limit rod 9, and the locking block 7 to move along the first direction close to one end of the first seat body 11, and the push rod 6 simultaneously cooperates with the first guide hole 511 and the second guide hole 521 to drive the first transmission block 51 and the second transmission block 52 to move simultaneously toward one end along the second direction and close to the first mold 2 until the first mold 2 abuts against the second mold 3. At this time, the locking block 7 abuts against the first transmission block 51, and the second limit rod 9 abuts against the first transmission block 51, thereby realizing the clamping of the first mold 2 and the second mold 3 in the second direction.

[0130] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. An injection mold with a core pulling mechanism, characterized in that: include: A frame (1) having a first seat body (11) and a second seat body (12) which are movably connected; A first mold (2) is arranged on the first base (11); a first mold cavity (21) is provided on the first mold (2); A second mold (3) is movably connected to the first mold (2); the second mold (3) is provided with a second cavity (31) facing the first cavity (21), and the second cavity (31) is movably connected to the first cavity (21); and a stretching hole (311) is provided on the second cavity (31); A molding core (4) is movably connected in the second mold (3); a buckle structure (41) is provided at one end of the molding core (4); the buckle structure (41) is extended into the second mold cavity (31) through the extension hole (311); A driving structure connected to the second seat body (12), the driving structure comprising a push rod (6), the push rod (6) moving along a first direction, the push rod (6) having an inclined rod section (61); A transmission structure (5), one end of which is connected to the power output end of the driving structure, and the other end of which is respectively transmission-connected to the second mold (3) and the molding core (4); the transmission structure (5) comprises a first transmission block (51) and a second transmission block (52); the first transmission block (51) is provided with a first guide hole (511) obliquely extending through it along a first direction, and the second transmission block (52) is provided with a second guide hole (521) obliquely extending through it along the first direction, the second guide hole (521) and the first guide hole (511) have the same inclination angle, and the aperture of the first guide hole (511) is larger than the aperture of the second guide hole (521); the oblique rod section (61) and the first guide hole (511) have the same inclination angle, and ... The rod section (61) is slidably extended in the second guide hole (521) and the first guide hole (511); the first transmission block (51) is slidably connected to the first base body (11) and is connected to a side of the second mold (3) facing away from the first mold (2), and is suitable for driving the second mold (3) to approach or move away from the first mold (2); the second transmission block (52) is slidably connected in the first transmission block (51), one end of which passes through the second mold (3) and is movably connected to the molding core (4), and is suitable for driving the molding core (4) to move in the second mold (3) along the first direction, thereby driving the buckle structure (41) to be extended in the extension hole (311) or to be separated from the extension hole (311); When the mold is opened, the driving structure first drives the second transmission block (52) of the transmission structure (5) away from the first mold (2), so as to drive the buckle structure (41) to separate from the extension hole (311) along the first direction, and then simultaneously pushes the first transmission block (51) and the second transmission block (52) to drive the second mold (3) to separate from the first mold (2) along the second direction; When closing the mold, the second transmission block (52) of the transmission structure (5) is first pushed close to the first mold (2) to achieve the reset of the buckle structure (41), and then the first transmission block (51) and the second transmission block (52) are simultaneously pushed close to the first mold (2) to drive the second mold (3) to reset; the first direction and the second direction have an included angle.

2. The injection mold with a core pulling mechanism according to claim 1, characterized in that: The centroids of the longitudinal sections of the first guide hole (511) and the second guide hole (521) gradually approach the second mould (3) in a direction away from the first seat body (11).

3. The injection mold with a core pulling mechanism according to claim 1 or 2, characterized in that: The longitudinal cross-sections of the first guide hole (511) and the second guide hole (521) are both rectangular.

4. The injection mold with a core pulling mechanism according to claim 1 or 2, characterized in that: One end of the second transmission block (52) extending in the second mold (3) is protruded with a guide rail (522); the guide rail (522) comprises a pair of spaced-apart limit plates (5221), a slideway (5222) is provided on the limit plates (5221), the centroid of the longitudinal section of the slideway (5222) gradually approaches the first seat body (11) in a direction away from the second transmission block (52), and an end of the slideway (5222) away from the second transmission block (52) passes through the limit plates (5221); The molding core (4) comprises a core body (42) and a pair of sliders (43) arranged on two sides of the core body (42) relative to each other, the pair of sliders (43) respectively slidably cooperate with a pair of slideways (5222); the buckle structure (41) is arranged on the core body (42) at one end away from the first seat body (11) and at a side away from the second transmission block (52).

5. The injection mold with a core pulling mechanism according to claim 4, characterized in that: The transmission structure (5) further comprises a transmission rod (53), one end of which is connected to the second transmission block (52) and the other end of which is connected to the guide rail (522), and the transmission rod (53) is slidably matched with the first transmission block (51) and the second mould (3) respectively.

6. The injection mold with a core pulling mechanism according to claim 5, characterized in that: The second mold (3) is also provided with: A protective sleeve (32) is provided with a sliding groove therein, the transmission rod (53) and the limiting plate (5221) are both slidably connected in the sliding groove, and an end of the molding core (4) facing away from the first seat body (11) is protruding from the protective sleeve (32); A limit block (33) is arranged in the slide groove at one end close to the forming core (4) and is sandwiched between the pair of limit plates (5221); The transmission rod (53) is provided with a first limiting groove (531) which is recessed from one end away from the second transmission block (52) towards the direction close to the second transmission block (52); the first limiting groove (531) is arranged to penetrate in a first direction; and the first limiting groove (531) is slidably matched with the limiting block (33).

7. The injection mold with a core pulling mechanism according to claim 6, characterized in that: A positioning block (321) is protruding from a side of the protective cover (32) facing away from the first seat body (11); The second mold (3) is also provided with an extension groove, the protective cover (32) and the molding core (4) are both arranged in the extension groove, and one end of the extension groove close to the second cavity (31) is connected to the extension hole (311); a positioning groove is provided in the extension groove, and the positioning block (321) is connected to the positioning groove.

8. The injection mold with a core pulling mechanism according to any one of claims 1 or 2, 5-7, characterized in that: A first limiting rod (512) is provided inside the first transmission block (51) along the first direction, and a second limiting groove (523) is provided inside the second transmission block (52) along the first direction. The first limiting rod (512) and the second limiting groove (523) are slidably matched in the second direction; when the buckle structure (41) is disengaged from or extended in the extension hole (311), the first limiting rod (512) is respectively in limiting contact with two side walls of the second limiting groove (523) in the second direction.

9. The injection mold with a core pulling mechanism according to any one of claims 1 or 2, 5-7, characterized in that: An elastic member (513) is provided in the first transmission block (51), and a clamping groove (524) is provided on the second transmission block (52); when the buckle structure (41) is separated from the extending hole (311), the elastic member (513) is clamped in the clamping groove (524).

10. The injection mold with a core pulling mechanism according to claim 1, characterized in that: It also comprises a locking block (7) which is slidably connected to the first transmission block (51) on a side away from the second mould (3), and is driven by the driving structure to move in a first direction, and is suitable for being in limited contact with the first transmission block (51) when the mould is closed.

11. The injection mold with a core pulling mechanism according to claim 10, characterized in that: A first limiting surface is provided on the locking block (7) on a side facing the first transmission block (51), and the first limiting surface has the same inclination angle as the first guide hole (511); and a second limiting surface is provided on the first transmission block (51) on a side facing the locking block (7), and the first limiting surface and the second limiting surface are slidably matched.

12. The injection mold with a core pulling mechanism according to claim 10 or 11, characterized in that: One end of the second transmission block (52) close to the locking block (7) passes through the first transmission block (51) and is slidably engaged with the locking block (7); The injection mold with the core pulling mechanism also includes a reverse locking block (8), which is fixedly arranged on the first seat body (11) and is located below the locking block (7), and is suitable for limiting abutment with the locking block (7) in the second direction.

13. The injection mold with a core pulling mechanism according to claim 12, characterized in that: The anti-locking block (8) comprises a bottom plate and a side plate, an end of the locking block (7) close to the first seat body (11) extends on the bottom plate, and a side of the locking block (7) facing away from the first transmission block (51) is in limiting contact with the side plate.

14. The injection mold with a core pulling mechanism according to any one of claims 10-11 and 13, characterized in that: It also includes a second limiting rod (9), which is located on the end of the first transmission block (51) away from the second mold (3) and is located on the side of the locking block (7); the second limiting rod (9) is driven by the driving structure to move along the first direction and slidably cooperate with the first transmission block (51), and is suitable for limiting and abutting with the first transmission block (51) when the second transmission block (52) is away from the first mold (2).

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