Core pulling assembly for mold and injection mold

Abstract

The utility model belongs to the technical field of injection molding processing, and discloses a core-pulling assembly for a mold and an injection mold, the core-pulling assembly for the mold comprises a first sliding block, a second sliding block, a connecting piece, a first guide pillar and a second guide pillar, the first sliding block and the second sliding block can slide on a fixed mold along a second direction and a first direction respectively; the core mold is slidably arranged on the first sliding block in the first direction, and the connecting piece is slidably arranged on the second sliding block in the second direction and can be fixedly connected with the core mold. The first guide column and the second guide column movably penetrate through the first sliding block and the second sliding block respectively, and when the movable mold is far away from the fixed mold in the third direction, the first sliding block moves in the direction far away from the core mold in the second direction; the second guide column comprises a driving part and a delay part, the delay part extends in the third direction, the driving part is obliquely arranged relative to the delay part, and when the movable mold is far away from the fixed mold in the third direction until the driving part is inserted into the second sliding block, the second sliding block moves in the direction far away from the first sliding block in the first direction. The injection mold is small in size and low in manufacturing cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding processing technical field especially, relates to a core pulling assembly for mould and injection mold. BACKGROUND

[0002] The core mold is a key component that cooperates with the mold cavity to define the shape and size of the product in the injection mold, and the core pulling structure is usually provided in the injection mold, so that the core mold that hinders the demolding of the injection product can be separated from the injection product before the demolding action is completed. For some injection products with structures inconsistent with the opening direction, especially injection products with slender structures (such as ejector pins), in order to completely avoid the injection product, the core mold and the core pulling structure required to move the core mold have a large moving stroke, which leads to an increase in the volume of the entire injection mold and an increase in the manufacturing cost of the injection mold. SUMMARY

[0003] The utility model discloses a core pulling assembly for mould and injection mold can solve the problem of large volume of injection mold caused by large moving stroke of core mold and core pulling structure in the prior art.

[0004] To achieve this purpose, the utility model adopts the following technical scheme:

[0005] The core pulling assembly for mould is used for driving the core mold to separate from the injection product, and includes a first sliding block, a second sliding block, a connecting piece, a first guide column and a second guide column. The first sliding block is configured to be slidingly connected with the core mold in a first direction. The connecting piece is slidingly arranged on the second sliding block in a second direction and can be fixedly connected with the core mold. The first guide column is movably arranged in the first sliding block. When the first guide column is pulled away from the first sliding block in a third direction, it drives the first sliding block to move in the second direction away from the core mold. The second guide column is movably arranged in the second sliding block. The second guide column includes a driving part and a delay part. The delay part extends in the third direction. The driving part is connected to the delay part and is inclinedly arranged relative to the delay part. When the driving part is inserted into the second sliding block in the third direction, it drives the second sliding block to move in the first direction away from the first sliding block. The first direction, the second direction and the third direction are perpendicular to each other.

[0006] Optionally, the first sliding block is provided with a first guide structure. The first guide structure is configured to slidingly cooperate with a fifth guide structure provided on the core mold in the first direction, and the first guide structure is limited in the core mold in the second direction and the third direction.

[0007] Optionally, the second slider is provided with a second guide structure, the connecting piece is provided with a sixth guide structure in sliding fit with the second guide structure, and the second guide structure is limited in the connecting piece in the first direction and the third direction.

[0008] Optionally, the first slider is provided with a third guide structure extending in the second direction.

[0009] Optionally, the second slider is provided with a fourth guide structure extending in the first direction.

[0010] Optionally, the first guide column is provided in a cylindrical structure, and the second guide column is provided in a rectangular cross section.

[0011] Optionally, the hole wall of the second guide hole comprises a first side wall surface and a third side wall surface oppositely arranged in the first direction and a second side wall surface and a fourth side wall surface oppositely arranged in the second direction, the first side wall surface, the second side wall surface, the third side wall surface and the fourth side wall surface jointly enclose the second guide hole, the first side wall surface and the third side wall surface each comprise a vertical section and an inclined section, the vertical section extends in the third direction, the inclined section is consistent with the inclined angle of the driving part, and the vertical section and the inclined section on the first side wall surface and the third side wall surface are oppositely arranged in the third direction.

[0012] The injection mold comprises a fixed mold, a movable mold and a core mold, and further comprises the core-pulling assembly for mold in any one of the preceding aspects, the delay parts of the first guide column and the second guide column are connected with the movable mold, the movable mold can move relative to the fixed mold in the third direction, the core mold is slidably arranged on the first slider, and the connecting piece is fixedly connected with the core mold.

[0013] Optionally, the first guide column and / or the second guide column are detachably connected with the movable mold.

[0014] Optionally, the core mold is provided with a T-shaped slot, and an end of the connecting piece away from the second slider is embedded in the T-shaped slot, so as to limit the movement of the connecting piece relative to the core mold in the first direction and the second direction.

[0015] The utility model discloses the beneficial effects of:

[0016] The core-pulling assembly for a mold and the injection mold comprising the same can adjust the movement track of the existing core mold into two sections with perpendicular directions, compared with the core mold moving along the second direction to completely separate from the area where the injection product is located, the core-pulling assembly for a mold can make the core mold first move along the second direction to separate from the injection product, and then move along the first direction until completely separate from the area where the injection product is located, so that the interference between the injection product and the core mold during demolding is avoided, and the volume of the entire injection mold is significantly reduced, and the manufacturing cost of the injection mold is reduced. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the core-pulling assembly for a mold connected with a core mold in the embodiment of the utility model;

[0018] Figure 2 is a front view of the core-pulling assembly for a mold in the embodiment of the utility model;

[0019] Figure 3 is a side view of the core-pulling assembly for a mold in the embodiment of the utility model;

[0020] Figure 4 is an assembly top view of the second sliding block and the second guide column in the embodiment of the utility model;

[0021] Figure 5 is Figure 4 the sectional view along A-A direction.

[0022] in the drawing:

[0023] 1, first sliding block; 11, first guide structure; 12, first guide hole; 13, third guide structure; 2, second sliding block; 21, second guide structure; 22, second guide hole; 23, fourth guide structure; 24, vertical section; 25, inclined section; 3, connecting piece; 4, first guide column; 5, second guide column; 51, delay part; 52, driving part;

[0024] 10, core mold. DETAILED DESCRIPTION

[0025] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that in order to facilitate the description, only the parts related to the utility model are shown in the drawings, not all the structures.

[0026] In the description of the utility model, unless another definite provision and limitation, the term "link", "connect", "fix" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two elements inside the communication or two element mutual action relation. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0027] In the utility model, unless another definite provision and limitation, the first feature is "on" or "under" the second feature can include the first and second features direct contact, also can include the first and second features are not direct contact but contact through the additional feature between them. Moreover, the first feature is "on", "above" and "on" the second feature includes the first feature is directly above and obliquely above the second feature, or just indicates that the first feature is higher than the second feature in horizontal height. The first feature is "under", "below" and "under" the second feature includes the first feature is directly below and obliquely below the second feature, or just indicates that the first feature is less than the second feature in horizontal height.

[0028] In the description of the embodiment, the terms "on", "under", "left", "right" and other orientation or position relationship are based on the orientation or position relationship shown in the drawing, only for the convenience of description and simplification operation, and not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, cannot be understood as a limitation on the utility model. In addition, the terms "first", "second" are only used to distinguish in description, and have no special meaning.

[0029] The utility model discloses an injection mold core pulling assembly and injection mold for mold, wherein the injection mold core pulling assembly is connected with the core mold 10, so that the core mold 10 is separated from the area where the injection product is located, the injection mold includes the injection mold core pulling assembly and the core mold 10, and further includes a fixed mold and a movable mold. Figure 1 The movable mold can reciprocate along the third direction (Z direction and its reverse direction) relative to the fixed mold, and can cooperate with the fixed mold to form a mold cavity. The core mold 10 is arranged on the fixed mold, and the core mold 10 can move under the driving of the injection mold core pulling assembly to cooperate with the fixed mold and the movable mold to shape the injection product, or to separate from the injection product to facilitate the post-mold stripping of the injection product. It can be understood that the core mold 10 is separated from the area where the injection product is located, which means that the orthographic projection of the core mold 10 on the injection product does not fall on the injection product along the moving direction of the movable mold.

[0030] Reference Figures 1-5As shown, the mold core-pulling assembly in this embodiment includes a first slider 1, a second slider 2, a connecting piece 3, a second guide post 5, and a first guide post 4. The first slider 1 and the second slider 2 are respectively along the second direction ( Figure 1 (in the Y direction and its opposite direction) and the first direction ( Figure 1 The first slider 1 is slidably mounted on the fixed mold (in the first direction and its opposite direction). The first slider 1 has a first guide structure 11 extending along the first direction. The core mold 10 has a fifth guide structure that slides in conjunction with the first guide structure 11. The first slider 1 is slidably connected to the core mold 10 through the slidingly engaged first guide structure 11 and fifth guide structure. The end of the core mold 10 away from the first slider 1 has a contour groove to conform to the mold cavity and restrict the shape of the injection molded product. The second slider 2 has a second guide structure 21 extending along the second direction. One end of the connecting piece 3 is connected to the second guide structure 21. The sixth guide structure of structure 21, which is in sliding fit, achieves a sliding connection with the second slider 2, and the other end is fixedly connected to the core mold 10. The first guide post 4 is detachably connected to the moving mold by means including but not limited to bolt connection and snap-fit. The first slider 1 is inclinedly provided with a first guide hole 12 for the first guide post 4 to be inserted. The first guide post 4 is movably inserted into the first guide hole 12. The first guide post 4 is configured such that when the moving mold moves away from the fixed mold (i.e. when the first guide post 4 is pulled away from the first slider 1 along the third direction), it drives the first slider 1 to move away from the core mold 10 along the second direction. The second guide post 5 is also detachably connected to the moving mold using methods including but not limited to bolt connections and snap-fit ​​connections. A second guide hole 22 is provided through the second slider 2 for the insertion of the second guide post 5. The second guide post 5 is movably inserted into the second slider 2. The second guide post 5 includes a driving part 52 and a delay part 51. The delay part 51 is connected to the moving mold, and its extension direction is consistent with the moving direction of the moving mold. The driving part 52 is connected to the end of the delay part 51 away from the moving mold and is inclined relative to the delay part 51. The driving part 52 is configured such that when the moving mold moves in a direction away from the fixed mold (i.e., when the driving part 52 is inserted into the second slider 2 along a third direction), it drives the second slider 2 to move in a direction away from the first slider 1 along a first direction. The first direction, the second direction, and the third direction are perpendicular to each other.

[0031] When the mold core assembly and the injection mold are opened, the movable mold moves along the third direction away from the fixed mold, and drives the second guide column 5 and the first guide column 4 to move together. Under the action of the first guide column 4, the first slider 1 drives the core mold 10 to move away from the injection product along the second direction. At this time, the delay part 51 of the second guide column 5 is arranged in the second slider 2, and the second slider 2 is stationary relative to the fixed mold. The connecting piece 3 moves along the second direction together with the core mold 10. With the continuous movement of the movable mold, the driving part 52 of the second guide column 5 is arranged in the second slider 2, and drives the second slider 2 to move along the first direction. The core mold 10 moves along the first direction together with the connecting piece 3, so as to completely separate from the area where the injection product is located. Compared with the movement of the core mold 10 along the second direction to completely separate from the area where the injection product is located, the volume of the entire injection mold is significantly reduced, the manufacturing cost of the injection mold is reduced, and the molded injection product is not easy to be damaged.

[0032] It can be understood that the first guide structure 11 can be a groove recessed on the surface of the first slider 1, or a protrusion protruding from the surface of the first slider 1. In order to prevent the core mold 10 from moving relative to the first slider 1 along a direction other than the first direction, the first guide structure 11 is limited in the fifth guide structure in the second direction and the third direction, thereby limiting the core mold 10. As for the specific limiting method, it can be realized by limiting the shape of the first guide structure 11 and the fifth guide structure, or by setting multiple first guide structures 11 and corresponding fifth guide structures. Different first guide structures 11 and fifth guide structures have different directions when connected, which will not be described here.

[0033] Similarly, in order to prevent the connecting piece 3 from moving relative to the second slider 2 along a direction other than the second direction, the second guide structure 21 is limited in the sixth guide structure in the first direction and the third direction.

[0034] Reference Figure 1 As shown in the figure, the end of the connecting piece 3 connected with the core mold 10, i.e. the end of the connecting piece 3 away from the second slider 2, is provided with a T-shaped structure. The core mold 10 is provided with a T-shaped groove in the same shape, and the connecting piece 3 is embedded in the T-shaped groove to realize the connection with the core mold 10. The T-shaped groove and the T-shaped part of the connecting piece 3 limit the movement of the connecting piece 3 relative to the core mold 10 along the second direction and the first direction, thereby ensuring that the connecting piece 3 can drive the core mold 10 to move along the second direction when moving along the second direction, and ensuring that the core mold 10 can drive the connecting piece 3 to move along the first direction when moving along the first direction.

[0035] Specifically, in order to improve the stability of the first slider 1 and the second slider 2 sliding on the fixed mold, the first slider 1 is provided with a third guide structure 13 extending along the second direction, and the first slider 1 is slidingly connected with the fixed mold through the third guide structure 13. The second slider 2 is provided with a fourth guide structure 23 extending along the first direction, and the second slider 2 is slidingly connected with the movable mold through the fourth guide structure 23. More specifically, the third guide structure 13 and the fourth guide structure 23 are both provided with two, and the two third guide structures 13 are respectively arranged on the opposite sides of the first slider 1 along the first direction, and the two fourth guide structures 23 are respectively arranged on the opposite sides of the second slider 2 along the second direction.

[0036] With reference to the accompanying drawings Figure 1 As shown, in order to reduce the friction between the first guide pillar 4 and the first slider 1, the first guide pillar 4 is provided in a cylindrical structure; and in order to increase the contact area between the second guide pillar 5 and the second slider 2, thereby improving the guiding stability of the second guide pillar 5 to the second slider 2, the cross section of the second guide pillar 5 is provided in a rectangular shape.

[0037] On this basis, the transverse cross section of the first guide hole in the embodiment is a circular hole, and the hole wall of the second guide hole 22 includes a first side wall surface, a second side wall surface, a third side wall surface and a fourth side wall surface, which together enclose the second guide hole 22. Among them, the first side wall surface and the third side wall surface are oppositely arranged along the first direction, and the second side wall surface and the third side wall surface are oppositely arranged along the second direction. The first side wall surface and the third side wall surface are both composed of a vertical segment 24 and an inclined segment 25 connected with each other, the vertical segment 24 extends along the third direction, and the inclined segment 25 is consistent with the inclination direction of the delay part 52 of the second guide pillar 5, and the vertical segment 24 and the inclined segment 25 on the first side wall surface and the third side wall surface are oppositely arranged in the third direction. When the delay part 51 is in the second guide hole 22, the delay part 51 is attached to the vertical segment 24 of the first side wall surface, the vertical segment 24 of the third side wall surface, the second side wall surface and the fourth side wall surface, and the second slider 2 is stationary relative to the fixed mold; when the delay part 52 is in the second guide hole, the delay part 52 is attached to the inclined segment 25 of the first side wall surface, the inclined segment 25 of the third side wall surface, the second side wall surface and the fourth side wall surface, and the second slider 2 moves along the first direction. That is, during the movement of the second guide pillar 5 in the second guide hole 22, the second guide pillar 5 has four surfaces attached to the second guide hole 22, and the guiding stability is high.

[0038] In other embodiments, the vertical segment 24 can also be replaced by an inclined surface or a curved surface opposite to the inclination direction of the driving part 52.

[0039] Obviously, the above embodiments of the present application are merely examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For those skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and also impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application claims.

Claims

1. A core-pulling assembly for a mold for driving a core (10) away from an injection-molded product, characterized in that, include: A first slider (1) is configured to slide in a first direction with the core mold (10); Second slider (2); The connector (3) is slidably disposed on the second slider (2) along the second direction and can be fixedly connected to the core mold (10); The first guide post (4) is movably inserted through the first guide hole (12) provided on the first slider (1). The first guide post (4) is configured to drive the first slider (1) to move along the second direction when it moves along the third direction. The second guide post (5) is movably inserted through the second guide hole (22) provided on the second slider (2). The second guide post (5) includes a driving part (52) and a delay part (51). The delay part (51) extends along a third direction. The driving part (52) is connected to the delay part (51) and is inclined relative to the delay part (51). The driving part (52) is configured to drive the second slider (2) to move along the first direction when it is inserted into or disengaged from the second slider (2) along the third direction. The first direction, the second direction, and the third direction are perpendicular to each other.

2. The core-drawing assembly for a mold according to claim 1, wherein The first slider (1) is provided with a first guide structure (11), which is configured to slide in cooperation with the fifth guide structure provided on the core mold (10) along the first direction, and the upper limit of the first guide structure in the second direction and the third direction is located on the core mold (10).

3. The mold core pulling assembly of claim 1, wherein, The second slider (2) is provided with a second guide structure (21), and the connector (3) is provided with a sixth guide structure that slides and cooperates with the second guide structure (21) along the second direction. The upper limit of the second guide structure (21) in the first direction and the third direction is located on the connector (3).

4. The core-drawing assembly for a mold according to claim 1, wherein The first slider (1) is provided with a third guide structure (13) extending along the second direction.

5. The mold core pulling assembly of claim 1, wherein, The second slider (2) is provided with a fourth guide structure (23) extending along the first direction.

6. The mold core pulling assembly of claim 1, wherein, The first guide post (4) is configured as a cylindrical structure, and the cross-section of the second guide post (5) is configured as a rectangle.

7. The core-drawing assembly for a mold according to claim 6, wherein The second guide hole (22) includes a first side wall and a third side wall that are arranged opposite to each other along the first direction, and a second side wall and a fourth side wall that are arranged opposite to each other along the second direction. The first side wall, the second side wall, the third side wall and the fourth side wall together form the second guide hole (22). The first side wall and the third side wall are each composed of a vertical section (24) and an inclined section (25). The vertical section (24) extends along the third direction, and the inclined section (25) is in the same inclination direction as the driving part (52). The vertical section (24) and the inclined section (25) on the first side wall and the third side wall are arranged in opposite directions in the third direction.

8. An injection mold, comprising a fixed mold, a moving mold, and a core mold (10), characterized in that, It also includes a core-pulling assembly for a mold as described in any one of claims 1-7, wherein the delay portions (51) of the first guide post (4) and the second guide post (5) are both connected to the moving mold, the moving mold is movable relative to the fixed mold along the third direction, the core mold (10) is slidably disposed on the first slider (1), and the connecting member (3) is fixedly connected to the core mold (10).

9. The injection mold according to claim 8, characterized in that, The first guide post (4) and / or the second guide post (5) are detachably connected to the moving mold.

10. The injection mold according to claim 8, characterized in that, The core mold (10) is provided with a T-shaped groove, and the end of the connector (3) away from the second slider (2) is embedded in the T-shaped groove to restrict the connector (3) from moving relative to the core mold (10) along the first direction and the second direction.

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