Injection mold capable of realizing multidirectional core pulling action

Abstract

The utility model discloses an injection mold capable of realizing multidirectional core-pulling action, and relates to the technical field of injection molds, in particular to an injection mold capable of realizing multidirectional core-pulling action, which comprises a bottom plate and a workpiece, a lower mold is fixed at the top of the bottom plate, an upper mold is mounted at the upper end of the lower mold, a top plate is mounted at the upper end of the upper mold, and the top plate is fixed on the bottom plate. The lower mold is provided with a tightening mechanism and is used for tightening after mold closing, the lower mold is provided with a core pulling mechanism and is used for multi-directional core pulling, and the tightening mechanism comprises a reinforcing assembly which comprises shaft brackets fixed at the two ends of the lower mold. The problems that a sealing strip is usually installed between two molds to increase the sealing performance, but the sealing strip is prevented from being abraded due to the fact that the two molds are frequently disassembled, the molds are not tightly attached after being closed, a gap is prone to occurring between the molds, and the forming quality of the injection mold is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold capable of realizing multi-directional core pulling actions. Background Art

[0002] Injection mold core pulling is an important part of mold design, especially when producing plastic products with complex structures or internal features. Core pulling usually involves the use of a slider mechanism or an inclined core pulling mechanism to ensure that the plastic part can be smoothly demolded from the mold;

[0003] After checking the public (announcement) number: CN217169572U, a multi-directional simultaneous core-pulling injection mold is disclosed. This technology discloses "when the mold is opened, the first shovel machine and the second shovel machine move upward, driving the first row seat and the second row seat to retreat, and the first row seat drives the oblique needle to retreat to achieve core pulling in two directions. After the oblique needle moves, the first row insert is driven to retreat to achieve inverted core pulling and demoulding, and at the same time, the second row insert is driven by the second row seat to achieve core pulling and demoulding in the third direction" and other technical solutions, which have "realizing core pulling in the front mold row and core pulling in three directions of the rear mold row at the same position" and other technical effects;

[0004] When the injection mold is undergoing injection molding, in order to avoid leakage between the two molds, a sealing strip is usually installed between the two molds to increase the sealing. However, due to the frequent separation of the two molds, the sealing strip will be worn, resulting in a loose fit after the molds are closed, and gaps are likely to appear between the two molds, which affects the molding quality of the injection mold. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model provides an injection mold that realizes multi-directional core pulling action, which has the characteristics of driving a linear rack to move through the output end of a first oil cylinder, and the linear rack drives an arc-shaped rack to rotate with a rotating shaft as the axis through an arc-shaped rack, and at the same time, the arc-shaped rack drives the arc-shaped rack to perform a core pulling action on one end of a workpiece.

[0006] To achieve the above purpose, the utility model is implemented by the following technical scheme: an injection mold for realizing multi-directional core pulling action, comprising a bottom plate and a workpiece, a lower mold is fixed on the top of the bottom plate, an upper mold is installed on the upper end of the lower mold, a top plate is installed on the upper end of the upper mold, a tight mechanism is provided on the lower mold and used for tightness after mold closing, a core pulling mechanism is provided on the lower mold and used for multi-directional core pulling, and the tight mechanism includes:

[0007] The reinforcement assembly includes a shaft frame fixed at both ends of the lower die, the shaft frame is pivotally connected with a pin rod, a clamping head is provided at the lower end of the pin rod, a guide head is provided at the upper end of the pin rod, and springs are installed at both ends of the upper die;

[0008] The release assembly, including brackets fixed at both ends of the top plate.

[0009] Preferably, the release assembly further comprises a guide seat provided at the lower end of the bracket.

[0010] Preferably, the core-pulling mechanism comprises:

[0011] The first core pulling assembly includes an arc frame rotatably installed inside the lower mold through a rotating shaft, a first limit head is installed on the inner wall of one end of the arc frame, an arc rack is fixed on the outer wall of the arc frame, a first oil cylinder is installed at the rear end of the lower mold, and a linear rack is installed at the output end of the first oil cylinder;

[0012] The second core pulling assembly includes a mounting frame fixed to the rear end of the lower die.

[0013] Preferably, there is meshing transmission between the linear rack on the output end of the first oil cylinder and the arc-shaped rack on the outer wall of the arc-shaped frame.

[0014] Preferably, the second core pulling assembly further comprises a second oil cylinder mounted at the rear end of the mounting frame, and a second limiting head is mounted at the output end of the second oil cylinder.

[0015] Preferably, the second core pulling assembly further comprises a guide rail fixed inside the lower die, and the second limit head is slidably installed in the guide rail.

[0016] Beneficial Effects

[0017] The utility model provides an injection mold that realizes multi-directional core pulling action. Compared with the prior art, it has the following beneficial effects:

[0018] (1) After the lower mold and the upper mold are closed, the pin rod is pushed to flip by the pressure of the spring rebound, so that the clamping head at the lower end of the pin rod buckles the bottom plate, thereby tightening the lower mold and the upper mold after the mold is closed, improving the tightness during the injection molding process.

[0019] (2) When the injection molding is completed and the mold needs to be opened, the top plate is removed and separated from the upper mold, so that the top plate pushes the guide head through the guide seat on the bracket, thereby driving the pin rod to flip, so that the clamping head at the lower end of the pin rod is separated from the inside of the bottom plate, which facilitates the release of the fastening of the lower mold and the upper mold.

[0020] (3) The linear rack is driven to move through the output end of the first oil cylinder, and the linear rack drives the arc frame to rotate with the rotating shaft as the axis through the arc rack. At the same time, the arc frame drives the arc rack to perform a core pulling action on one end of the workpiece; at the same time, the second limit head is driven by the output end of the second oil cylinder to perform a core pulling action on the other end of the workpiece, thereby realizing a multi-directional core pulling action on the arc tube-shaped workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0022] Figure 2 It is a front view of the utility model;

[0023] Figure 3 It is a schematic diagram of the structure inside the lower mold of the utility model;

[0024] Figure 4 It is a structural schematic diagram of the core pulling mechanism in the utility model.

[0025] In the figure: 1. bottom plate; 2. lower die; 3. upper die; 4. top plate; 5. tight mechanism; 51. reinforcement assembly; 511. shaft frame; 512. pin rod; 513. clamping head; 514. guide head; 515. spring; 52. release assembly; 521. bracket; 522. guide seat; 6. core pulling mechanism; 61. first core pulling assembly; 611. rotating shaft; 612. arc frame; 613. first limit head; 614. arc rack; 615. first cylinder; 616. linear rack; 62. second core pulling assembly; 621. mounting frame; 622. guide rail; 623. second limit head; 624. second cylinder; 7. workpiece. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-4 The utility model provides a technical solution for an injection mold that realizes a multi-directional core pulling action: an injection mold that realizes a multi-directional core pulling action, comprising a bottom plate 1 and a workpiece 7, a lower mold 2 is fixed on the top of the bottom plate 1, an upper mold 3 is installed on the upper end of the lower mold 2, a top plate 4 is installed on the upper end of the upper mold 3, a tight mechanism 5 is provided on the lower mold 2 and is used for tightness after mold closing, a core pulling mechanism 6 is provided on the lower mold 2 and is used for multi-directional core pulling, and the tight mechanism 5 includes:

[0028] The reinforcement assembly 51 includes a shaft frame 511 fixed at both ends of the lower mold 2, the shaft frame 511 is pivotally connected to a pin rod 512, a clamping head 513 is provided at the lower end of the pin rod 512, a guide head 514 is provided at the upper end of the pin rod 512, and springs 515 are installed at both ends of the upper mold 3;

[0029] The release assembly 52 includes brackets 521 fixed to both ends of the top plate 4 .

[0030] In this embodiment, after the lower mold 2 and the upper mold 3 are closed, the rebound pressure of the spring 515 pushes the pin 512 to flip, so that the clamping head 513 at the lower end of the pin 512 buckles the bottom plate 1, thereby fastening the lower mold 2 and the upper mold 3 after the mold is closed, thereby improving the tightness during the injection molding process.

[0031] Specifically, the release assembly 52 further includes a guide seat 522 provided at the lower end of the bracket 521 .

[0032] In this embodiment, when the injection molding is completed and the mold needs to be opened, the top plate 4 is removed and separated from the upper mold 3 upward, so that the top plate 4 pushes the guide head 514 through the guide seat 522 on the bracket 521, thereby driving the pin rod 512 to flip, so that the clamping head 513 at the lower end of the pin rod 512 is separated from the interior of the bottom plate 1, thereby releasing the fastening of the lower mold 2 and the upper mold 3.

[0033] Specifically, the core pulling mechanism 6 includes:

[0034] The first core pulling assembly 61 includes an arc frame 612 rotatably mounted inside the lower mold 2 via a rotating shaft 611, a first limit head 613 is mounted on the inner wall of one end of the arc frame 612, an arc rack 614 is fixed on the outer wall of the arc frame 612, a first oil cylinder 615 is mounted on the rear end of the lower mold 2, and a linear rack 616 is mounted on the output end of the first oil cylinder 615;

[0035] The second core pulling assembly 62 includes a mounting frame 621 fixed to the rear end of the lower mold 2 .

[0036] In this embodiment, the linear rack 616 is driven to move by the output end of the first oil cylinder 615, and the linear rack 616 drives the arc frame 612 to rotate around the rotating shaft 611 through the arc rack 614. At the same time, the arc frame 612 drives the arc rack 614 to perform a core pulling action on one end of the workpiece 7.

[0037] Specifically, there is meshing transmission between the linear rack 616 on the output end of the first oil cylinder 615 and the arc-shaped rack 614 on the outer wall of the arc-shaped frame 612 .

[0038] Specifically, the second core pulling assembly 62 further includes a second oil cylinder 624 installed at the rear end of the mounting frame 621 , and a second limiting head 623 is installed at the output end of the second oil cylinder 624 .

[0039] In this embodiment, the second limit head 623 is driven by the output end of the second oil cylinder 624 to perform a core pulling action on the other end of the workpiece 7 .

[0040] Specifically, the second core pulling assembly 62 further includes a guide rail 622 fixed inside the lower mold 2 , and the second limit head 623 is slidably installed in the guide rail 622 .

[0041] In this embodiment, when the second limiting head 623 moves, it slides along the inside of the guide rail 622, thereby improving stability during the movement.

[0042] The working principle and use process of the utility model are as follows: first, after the lower mold 2 and the upper mold 3 are closed, the pin 512 is pushed to flip by the rebound pressure of the spring 515, so that the clamping head 513 at the lower end of the pin 512 buckles the bottom plate 1, thereby fastening the lower mold 2 and the upper mold 3 after the mold is closed, improving the tightness during the injection molding process; when the injection molding is completed and the mold needs to be opened, the top plate 4 is disassembled upward from the upper mold 3, so that the top plate 4 pushes the guide head 514 through the guide seat 522 on the bracket 521, thereby driving the pin 512 to flip. , so that the clamping head 513 at the lower end of the pin rod 512 is separated from the inside of the base plate 1, thereby releasing the fastening of the lower mold 2 and the upper mold 3; then, the linear rack 616 is driven to move through the output end of the first oil cylinder 615, and the linear rack 616 drives the arc frame 612 to rotate around the rotating shaft 611 through the arc rack 614, and at the same time, the arc frame 612 drives the arc rack 614 to perform a core pulling action on one end of the workpiece 7; at the same time, the second limit head 623 is driven by the output end of the second oil cylinder 624 to perform a core pulling action on the other end of the workpiece 7.

[0043] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0044] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold for realizing multi-directional core pulling action, comprising a base plate (1) and a workpiece (7), characterized in that: A lower mold (2) is fixed on the top of the bottom plate (1), an upper mold (3) is installed on the upper end of the lower mold (2), and a top plate (4) is installed on the upper end of the upper mold (3). A tight mechanism (5) is provided on the lower mold (2) and is used for tightness after mold closing. A core pulling mechanism (6) is provided on the lower mold (2) and is used for multi-directional core pulling. The tight mechanism (5) includes: The reinforcement assembly (51) comprises an axle frame (511) fixed at both ends of the lower mold (2), the axle frame (511) is pivotally connected to a pin rod (512), a clamping head (513) is provided at the lower end of the pin rod (512), a guide head (514) is provided at the upper end of the pin rod (512), and springs (515) are installed at both ends of the upper mold (3); The release assembly (52) includes brackets (521) fixed at both ends of the top plate (4).

2. The injection mold for realizing multi-directional core pulling action according to claim 1, characterized in that: The release assembly (52) further comprises a guide seat (522) provided at the lower end of the bracket (521).

3. The injection mold for realizing multi-directional core pulling according to claim 1, characterized in that: The core-pulling mechanism (6) comprises: The first core pulling assembly (61) comprises an arc frame (612) rotatably mounted inside the lower die (2) via a rotating shaft (611), a first limit head (613) being mounted on the inner wall of one end of the arc frame (612), an arc rack (614) being fixed on the outer wall of the arc frame (612), a first oil cylinder (615) being mounted at the rear end of the lower die (2), and a linear rack (616) being mounted on the output end of the first oil cylinder (615); The second core pulling assembly (62) comprises a mounting frame (621) fixed to the rear end of the lower mold (2).

4. The injection mold for realizing multi-directional core pulling according to claim 3, characterized in that: There is meshing transmission between the linear rack (616) on the output end of the first oil cylinder (615) and the arc-shaped rack (614) on the outer wall of the arc-shaped frame (612).

5. The injection mold for realizing multi-directional core pulling action according to claim 3, characterized in that: The second core pulling assembly (62) further comprises a second oil cylinder (624) mounted at the rear end of the mounting frame (621), and a second limit head (623) is mounted at the output end of the second oil cylinder (624).

6. The injection mold for realizing multi-directional core pulling according to claim 5, characterized in that: The second core pulling assembly (62) further comprises a guide rail (622) fixed inside the lower mold (2), and the second limit head (623) is slidably installed in the guide rail (622).

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