Fixed mold core-pulling structure and mold

Abstract

The present invention provides a fixed mold core-pulling structure and a mold, relating to the technical field of molds, and solving the technical problem in the prior art that in a mold with a fixed mold core-pulling structure inside, when an oil cylinder is used for core-pulling, the fixed mold core-pulling structure may retreat under the injection pressure. The fixed mold core-pulling structure includes a locking block, a constant pressure block, and a moving pressure block inserted into the constant pressure block, and further includes a self-locking mechanism. Among them, the self-locking mechanism is arranged on the locking block and contacts the moving pressure block. When the fixed mold core-pulling mechanism is in the mold-closing state, a part of the elastic self-locking mechanism protruding from the locking block contacts the constant pressure block to lock the locking block; when the moving pressure block moves, under the extrusion of the moving pressure block, the part of the self-locking mechanism contacting the constant pressure block retracts into the locking block to enable the locking block to move together with the moving pressure block. The present invention is used to prevent the injection pressure from pushing the core-pulling structure and causing product defects.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and in particular to a fixed mold core pulling structure and a mold provided with the fixed mold core pulling structure. Background Art

[0002] In the design process of injection molds, an oil cylinder core pulling mechanism is required for the mold opening and closing actions. In a conventional mold structure, a spring plate is designed to control the mold opening and closing for the fixed mold core pulling structure.

[0003] The applicant of the present invention has found that the prior art has at least the following technical problems:

[0004] For a mold with a fixed mold core pulling structure inside, if an oil cylinder is used for core pulling and no self-locking mechanism is designed, the core pulling structure may retreat (the slider retreats) under the injection pressure, resulting in unqualified products and making the mold inapplicable to production. Summary of the Invention

[0005] The purpose of the present invention is to provide a fixed mold core pulling structure and a mold, which solve the technical problem that in the prior art, for a mold with a fixed mold core pulling structure inside, when an oil cylinder is used for core pulling, the fixed mold core pulling structure may retreat under the injection pressure. The preferred technical solutions provided by the present invention can produce many technical effects, which will be elaborated in detail below.

[0006] To achieve the above purpose, the present invention provides the following technical solutions:

[0007] A fixed mold core pulling structure provided by the present invention includes a locking block, a fixed pressure block, and a moving pressure block inserted into the fixed pressure block, and further includes a self-locking mechanism. Among them, the self-locking mechanism is arranged on the locking block and contacts the moving pressure block. When the fixed mold core pulling mechanism is in the mold closing state, a part of the elastic self-locking mechanism protruding from the locking block contacts the fixed pressure block to lock the locking block; when the moving pressure block moves, under the extrusion of the moving pressure block, the part of the self-locking mechanism contacting the fixed pressure block retracts into the locking block to enable the locking block to move together with the moving pressure block.

[0008] Further, one end of the locking block is inserted into the mounting hole of the moving pressure block. A guiding groove hole communicating with the mounting hole is formed on the moving pressure block. The self-locking mechanism is located in the placement cavity on the locking block and there is a part of the self-locking mechanism that can extend into the guiding groove hole.

[0009] Further, there is an inclined guiding surface on the guiding groove hole that slopes obliquely upward from the end communicating with the mounting hole to the end far from the mounting hole. The part of the self-locking mechanism extending into the guiding groove hole can move along the inclined guiding surface.

[0010] Further, the self-locking mechanism includes a fixed guide, an elastic member, and a buckle member. The fixed guide is disposed on the locking block, the elastic member is sleeved on the fixed guide, and the buckle member passes through the fixed guide and is pressed between the elastic member and the hole wall of the mounting hole or the end of the fixed guide.

[0011] Further, there is a first protruding portion on the buckle member that can extend into the guiding groove hole and a second protruding portion that can contact the end face of the constant pressure block. The first protruding portion and the second protruding portion are located on the same side of the buckle member.

[0012] Further, the fixed guide is disposed in a direction perpendicular to the locking block and the moving pressure block, and the fixed guide can move along the axial direction of the fixed guide.

[0013] Further, the fixed guide is a limit screw, the head of the fixed guide is located inside the buckle member, and the head of the fixed guide can abut against the inner side surface of the buckle member.

[0014] Further, an elastic member accommodating cavity is provided on the buckle member, and the elastic member extends into the elastic member accommodating cavity and is clamped between the locking block and the inner side surface of the buckle member.

[0015] Further, a connecting limiting member is provided on the locking block, the connecting limiting member is inserted into the moving pressure block, and when the moving pressure block moves, it can move to a position where its inner side surface abuts against the head of the connecting limiting member so that the moving pressure block can drive the locking block to move.

[0016] A mold includes the fixed mold core-pulling structure described above.

[0017] The present invention provides a fixed mold core-pulling structure including an elastic self-locking mechanism. When the fixed mold core-pulling mechanism is in the mold closing state, a partial structure of the elastic self-locking mechanism protruding from the locking block contacts the constant pressure block to lock the locking block, so that even under the action of the injection pressure, the slider does not move backward, solving the technical problem in the prior art that in a mold with a fixed mold core-pulling structure inside, when using an oil cylinder for core-pulling, the fixed mold core-pulling structure may move backward under the injection pressure, thereby avoiding product defects; when the oil cylinder drives the moving pressure block to move upward, the moving pressure block squeezes the elastic self-locking mechanism, causing a part of the elastic self-locking mechanism that contacts the constant pressure block to gradually retract into the locking block until the locking between the locking block and the constant pressure block is released, and the moving pressure block drives the locking block to move together. Description of the Drawings

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0019] Figure 1 is a cross-sectional schematic view of the fixed mold core-pulling structure provided by the embodiment of the present invention (the fixed mold core-pulling mechanism is in the mold-closing state);

[0020] Figure 2 is a cross-sectional schematic view of the fixed mold core-pulling structure provided by the embodiment of the present invention (the state of the fixed mold core-pulling mechanism during the rising process);

[0021] Figure 3 is a cross-sectional schematic view of the fixed mold core-pulling structure provided by the embodiment of the present invention (the fixed mold core-pulling mechanism is in the mold-opening state);

[0022] Figure 4 is a top view schematic view of the fixed mold core-pulling structure provided by the embodiment of the present invention.

[0023] In the figure, 1 - locking block; 2 - constant pressure block; 3 - moving pressure block; 31 - guiding groove hole; 311 - inclined guiding surface; 4 - elastic self-locking mechanism; 41 - fixed guiding member; 42 - elastic member; 43 - buckling member; 431 - first protruding part; 432 - second protruding part; 5 - connecting limiting member; 6 - slider; 7 - slider T-block; 8 - limiting column; 9 - oil cylinder pull rod; 10 - oil cylinder; 11 - oil cylinder seat. Detailed implementation manners

[0024] To make the objectives, technical solutions and advantages of the present invention clearer, the following will describe the technical solutions of the present invention in detail. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0025] See Figures 1-4, the present invention provides a core-pulling structure for the fixed mold, including a locking block 1, a constant-pressure block 2, and a moving pressure block 3 inserted into the constant-pressure block 2. It also includes an elastic self-locking mechanism 4. Among them, the elastic self-locking mechanism 4 is arranged on the locking block 1 and contacts the moving pressure block 3. When the core-pulling mechanism of the fixed mold is in the mold-closing state, the part of the elastic self-locking mechanism 4 protruding from the locking block 1 contacts the constant-pressure block 2 to lock the locking block 1; when the moving pressure block 3 moves, under the extrusion of the moving pressure block 3, the part of the elastic self-locking mechanism 4 in contact with the constant-pressure block 2 retracts into the locking block 1 to enable the locking block 1 to move together with the moving pressure block 3. When the core-pulling mechanism of the fixed mold is in the mold-closing state, the elastic self-locking mechanism 4 cooperates with the constant-pressure block 2 to lock the locking block 1. Even under the action of the injection pressure, the slider 6 does not move backward, thus avoiding product defects; during the upward movement of the moving pressure block 3 driven by the oil cylinder 10, the moving pressure block 3 extrudes the elastic self-locking mechanism 4, causing the part of the elastic self-locking mechanism 4 in contact with the constant-pressure block 2 to gradually retract into the locking block 1 until the locking between the locking block 1 and the constant-pressure block 2 is released. Subsequently, the moving pressure block 3 drives the locking block 1 to move together, causing the slider 6 to move in the mold-opening direction.

[0026] As an optional implementation manner of the embodiment of the present invention, refer to Figures 1-3 , one end of the locking block 1 is inserted into the mounting hole of the moving pressure block 3. A guiding groove hole 31 communicating with the mounting hole is formed on the moving pressure block 3. The elastic self-locking mechanism 4 is located in the placement cavity on the locking block 1, and there is a part of the elastic self-locking mechanism 4 that can extend into the guiding groove hole 31. Refer to Figure 1 , when the core-pulling mechanism of the fixed mold is in the mold-closing state, a part of the structure (the first protruding part 431) on the elastic self-locking mechanism 4 extends into the guiding groove hole 31; when the moving pressure block 3 is driven by the oil cylinder 10 to move upward, the hole wall of the guiding groove hole 31 extrudes the first protruding part 431, causing the elastic self-locking mechanism 4 to gradually retract into the locking block 1.

[0027] As an optional implementation manner of the embodiment of the present invention, in order to facilitate the moving pressure block 3 to extrude the elastic self-locking mechanism 4 when moving upward so that it moves in the direction of extending into the locking block 1, there is an inclined guiding surface 311 on the guiding groove hole 31 that slopes obliquely upward from the end communicating with the mounting hole to the end far from the mounting hole. The part of the elastic self-locking mechanism 4 extending into the guiding groove hole 31 moves along the inclined guiding surface 311.

[0028] As an optional implementation manner of the embodiment of the present invention, refer to Figures 1-3, the elastic self-locking mechanism 4 includes a fixed guide member 41, an elastic member 42, and a buckle member 43. The fixed guide member 41 is disposed on the locking block 1. An elastic member 42 is sleeved on the fixed guide member 41. The buckle member 43 passes through the fixed guide member 41 and is pressed between the elastic member 42 and the hole wall of the mounting hole or between the ends of the fixed guide member 41. The elastic member 42 can be a spring. When the oil cylinder 10 drives the moving pressure block 3 to move upward, the moving pressure block 3 pushes the buckle member 43 to move along the fixed guide member 41 in the direction of extending into the locking block 1. The buckle member 43 presses the elastic member 42 so that the elastic member 42 is in a compressed state. When the locking block 1 and the moving pressure block 3 are reset under the drive of the oil cylinder 10 (the fixed mold core-pulling mechanism is in the mold-closing state), the elastic self-locking mechanism 4 can be reset under the action of the elastic member 42.

[0029] As an optional implementation manner of the embodiment of the present invention, refer to Figures 1-3 , there is a first protruding portion 431 on the buckle member 43 that can extend into the guide groove hole 31 and a second protruding portion 432 that can contact the end face of the fixed pressure block 2. The first protruding portion 431 and the second protruding portion 432 are located on the same side of the buckle member 43. Refer to Figure 1 , Figure 1 shows the position of the first protruding portion 431 and the second protruding portion 432 when the fixed mold core-pulling mechanism is in the mold-closing state. At this time, the second protruding portion 432 restricts the locking block 1 from moving in the direction of the moving pressure block 3; refer to Figure 2 and Figure 3 , at this time, the first protruding portion 431 abuts against the hole wall of the mounting hole on the moving pressure block 3, and the second protruding portion 432 is also located inside the locking block 1, releasing the locking restriction of the second protruding portion 432 on the locking block 1.

[0030] As an optional implementation manner of the embodiment of the present invention, refer to Figures 1-3 , the fixed guide member 41 is disposed along a direction perpendicular to the locking block 1 and the moving pressure block 3, and the fixed guide member 41 can move along the axial direction of the fixed guide member 41; the fixed guide member 41 can be a limit screw, refer to Figures 1-3 , the head of the fixed guide member 41 is located inside the buckle member 43, refer to Figure 1 , when the fixed mold core-pulling mechanism is in the mold-closing state, the head of the fixed guide member 41 can abut against the inner side surface of the buckle member 43.

[0031] As an optional implementation manner of the embodiment of the present invention, refer to Figures 1-3 , an elastic member accommodation cavity is provided on the buckle member 43. The elastic member 42 extends into the elastic member accommodation cavity and is clamped between the locking block 1 and the inner side surface of the buckle member 43.

[0032] As an optional implementation manner of the embodiment of the present invention, a connection limiting member 5 is provided on the locking block 1. The connection limiting member 5 can be a limiting screw. The connection limiting member 5 is inserted into the moving pressure block 3. When the moving pressure block 3 moves, it can move to a position where its inner side abuts against the head of the connection limiting member 5 so as to enable the moving pressure block 3 to drive the locking block 1 to move. The oil cylinder 10 is installed on the oil cylinder seat 11, and the oil cylinder seat 11 is fixed to the fixed template. One end of the oil cylinder pull rod 9 is fixedly connected to the oil cylinder 10 through a screw thread, and the other end is connected to the moving pressure block 3 through a T-slot; see Figure 2 , when the oil cylinder 10 acts, it first drives the moving pressure block 3 to move upward by a distance X1. When the head of the connection limiting member 5 abuts against the inner side of the moving pressure block 3, the oil cylinder 10 drives the moving pressure block 3 and the locking block 1 to move together. At this time, the elastic self-locking mechanism 4 releases the locking between the locking block 1 and the fixed pressure block 2.

[0033] A mold includes the fixed mold core pulling structure provided by the present invention.

[0034] The movement process of the mold opening of the fixed mold core pulling structure provided by the present invention is as follows:

[0035] See Figure 1 , the fixed mold core pulling mechanism is in the mold closing state. At this time, the first protruding part 431 extends into the guiding groove hole 31, and the second protruding part 432 contacts the end of the fixed pressure block 2. At this time, the second protruding part 432 restricts the locking block 1 from moving in the direction of the moving pressure block 3, and the buckle part 43 is pressed between the elastic member and the inner side wall of the moving pressure block 3 or / and the end of the fixed guiding member 41;

[0036] See Figure 2 , when the oil cylinder 10 starts to act, the oil cylinder 10 drives the moving pressure block 3 to move through the oil cylinder pull rod 9. At this time, the locking block 1 is in a static state. During the movement of the moving pressure block 3, the inclined guiding surface 311 of the guiding groove hole 31 presses the first protruding part 431 to make the buckle part 43 move in the direction of extending into the locking block 1 until it moves to the Figure 2 position shown in the figure. At this time, the elastic self-locking mechanism 4 releases the locking between the fixed pressure block 2 and the locking block 1. Among them, Y1 indicates the moving distance when the buckle part 43 extends into the locking block 1, X1 indicates the upward moving distance of the moving pressure block 3 relative to the locking block 1, and Z1 indicates the interfering distance between the buckle part 43 and the fixed pressure block 2;

[0037] See Figure 3 , when the oil cylinder 10 continues to act, the moving pressure block 3 drives the locking block 1 to move upward together. The slider T-block moves along the T-shaped groove, and the slider 6 moves along the Figure 3 direction indicated by the arrow in the figure until it contacts the limit post 8, completing the entire mold opening action.

[0038] The movement process of the mold closing of the fixed mold core pulling structure provided by the present invention is as follows (opposite to the above mold opening process):

[0039] The oil cylinder 10 moves, driving the dynamic pressure block 3 and the locking block 1 to move downward together until the locking block 1 reaches a predetermined position, and then the dynamic pressure block 3 moves downward. At this time, the first protruding part 431 gradually extends into the guiding groove hole 31, and the second protruding part 432 also gradually extends until it moves to Figure 1 the position shown in the figure, completing the mold clamping of the core-pulling structure for the fixed mold.

[0040] As described above, it is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A fixed mold core-pulling structure, comprising a locking block (1), a constant pressure block (2), and a moving pressure block (3) inserted into the constant pressure block (2), characterized in that, it further comprises an elastic self-locking mechanism (4), wherein, the elastic self-locking mechanism (4) is arranged on the locking block (1) and contacts the moving pressure block (3). When the fixed mold core-pulling structure is in the mold-closing state, the part of the elastic self-locking mechanism (4) protruding from the locking block (1) contacts the constant pressure block (2) to lock the locking block (1); when the moving pressure block (3) moves, under the extrusion of the moving pressure block (3), the part of the elastic self-locking mechanism (4) contacting the constant pressure block (2) retracts into the locking block (1) to enable the locking block (1) to move together with the moving pressure block (3); one end of the locking block (1) is inserted into the mounting hole of the moving pressure block (3). A guiding groove hole (31) communicating with the mounting hole is formed in the moving pressure block (3). The elastic self-locking mechanism (4) is located in the placement cavity on the locking block (1), and there is a part of the elastic self-locking mechanism (4) that can extend into the guiding groove hole (31).

2. The fixed mold core-pulling structure according to claim 1, characterized in that, there is an inclined guiding surface (311) on the guiding groove hole (31) that is inclined obliquely upward from the end communicating with the mounting hole to the end far from the mounting hole. The part of the elastic self-locking mechanism (4) extending into the guiding groove hole (31) can move along the inclined guiding surface (311).

3. The fixed mold core-pulling structure according to claim 1 or 2, characterized in that, the elastic self-locking mechanism (4) comprises a fixed guiding member (41), an elastic member (42), and a clamping member (43). The fixed guiding member (41) is arranged on the locking block (1). An elastic member (42) is sleeved on the fixed guiding member (41). The clamping member (43) passes through the fixed guiding member (41), and the clamping member (43) is pressed between the elastic member (42) and the hole wall of the mounting hole or the end of the fixed guiding member (41).

4. The fixed mold core-pulling structure according to claim 3, characterized in that, there is a first protruding part (431) on the clamping member (43) that can extend into the guiding groove hole (31) and a second protruding part (432) that can contact the end face of the constant pressure block (2). The first protruding part (431) and the second protruding part (432) are located on the same side of the clamping member (43).

5. The fixed mold core-pulling structure according to claim 3, characterized in that, the fixed guiding member (41) is arranged in a direction perpendicular to the locking block (1) and the moving pressure block (3), and the fixed guiding member (41) can move along the axial direction of the fixed guiding member (41).

6. The fixed mold core-pulling structure according to claim 3, characterized in that, The fixed guide (41) is a limit screw, and the head of the fixed guide (41) is located inside the buckle member (43), and the head of the fixed guide (41) can abut against the inner side surface of the buckle member (43).

7. The fixed mold core-pulling structure according to claim 3, characterized in that, an elastic member accommodating cavity is provided on the buckle member (43), and the elastic member (42) extends into the elastic member accommodating cavity and is clamped between the locking block (1) and the inner side surface of the buckle member (43).

8. The fixed mold core-pulling structure according to claim 1, characterized in that, a connecting limit member (5) is provided on the locking block (1), the connecting limit member (5) is inserted into the moving pressure block (3), and when the moving pressure block (3) moves, it can move to a position where its inner side surface abuts against the head of the connecting limit member (5) so as to enable the moving pressure block (3) to drive the locking block (1) to move.

9. A mold, characterized in that, comprising the fixed mold core-pulling structure according to any one of claims 1-8.

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