An arc-shaped reverse buckle forming mold

Abstract

The present invention discloses an arc-shaped reverse buckle forming die, which includes a convex mold and a concave mold. The convex mold and the concave mold can be closed and opened. When the convex mold and the concave mold are closed, the convex mold and the concave mold enclose a product injection cavity. One end of the product injection cavity extends towards the lower left, and the other end of the product injection cavity extends towards the right. A first structural block is provided at the lower left of the product injection cavity, and the first structural block can be inserted into the lower left end of the product injection cavity. On the right of the product injection cavity, there are a second structural block, a third structural block, and a fourth structural block distributed in sequence from top to bottom. The second structural block, the third structural block, and the fourth structural block can be inserted towards the left into the right end of the product injection cavity and cooperate with the first structural block. A runner extending outwards is provided on the left inner wall of the product injection cavity. The structural design of the present invention is reasonable, canceling the wax splicing process and directly forming integrally.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and particularly to a mold for forming an arc undercut position. Background Art

[0002] Refer to Figure 4 , due to the arc undercut position (14) inside the product (11), in the prior art, when manufacturing the product (11) as a wax part, it usually needs to be disassembled and the wax splicing process is used to complete it. That is to say, the main body part of the product (11) and the arc undercut position (14) are formed separately and then the wax splicing process is used to complete it.

[0003] Problems of the above technology: This method has low production efficiency and poor product appearance. Summary of the Invention

[0004] The purpose of the present invention is to provide a mold for forming an arc undercut position to solve the technical problems of low production efficiency and poor product appearance in the background art.

[0005] To achieve the above purpose, the technical solution of the present invention provides a mold for forming an arc undercut position, including a male mold and a female mold. The male mold and the female mold can be closed and opened. When the male mold and the female mold are closed, the male mold and the female mold enclose a product injection cavity. One end of the product injection cavity extends towards the lower left, and the other end of the product injection cavity extends towards the right. A first structural block is provided at the lower left of the product injection cavity, and the first structural block can be inserted into the lower left end of the product injection cavity. On the right of the product injection cavity, there are a second structural block, a third structural block, and a fourth structural block distributed from top to bottom in sequence. The second structural block, the third structural block, and the fourth structural block can be inserted towards the left into the right end of the product injection cavity and cooperate with the first structural block. An injection runner extending outwards is provided on the left inner wall of the product injection cavity.

[0006] Further, an arc portion is provided on the right upper end of the first structural block near the injection runner, and a fitting groove is provided on the right upper end of the first structural block far from the injection runner. The left ends of the second structural block and the third structural block can be fitted with the fitting groove, and the upper and lower sides of the third structural block are respectively fitted with the second structural block and the fourth structural block.

[0007] Further, a step with an opening facing downwards is provided at the lower left end of the second structural block. The left side of the step is a horizontal plane, and the right side of the step is an inclined plane that gradually slopes downwards from left to right. A convex platform is provided at the upper left end of the third structural block. The left side of the convex platform is a horizontal plane, and the right side of the convex platform is an inclined plane that gradually slopes downwards from left to right. The step and the convex platform are fitted together.

[0008] Further, an arc-shaped groove with an opening facing downward is provided at the lower left end of the third structural block. The left side of the arc-shaped groove is an arc surface that gradually slopes upward from left to right, and the right side of the arc-shaped groove is an arc surface that gradually slopes downward from left to right. An arc-shaped platform is provided at the upper left end of the fourth structural block. The left side of the arc-shaped platform is an arc surface that gradually slopes upward from left to right, and the right side of the arc-shaped platform is an arc surface that gradually slopes downward from left to right. The arc-shaped platform is fitted with the arc-shaped groove.

[0009] Further, a swing rod is provided at the right end of the third structural block. The right end of the swing rod extends to the outside of the product injection mold cavity and is movably connected to the movable block by a pin. The swing rod can swing up and down around the pin, and the movable block can drive the swing rod to move left and right.

[0010] Further, a first limiting block is provided at the right end of the second structural block. The first limiting block is arranged outside the product injection mold cavity, and the first limiting block can be in limiting cooperation with the upper right part of the product injection mold cavity. A second limiting block is provided at the right end of the fourth structural block. The second limiting block is arranged outside the product injection mold cavity, and the second limiting block can be in limiting cooperation with the lower right part of the product injection mold cavity.

[0011] Further, a third limiting block extending downward is provided at the right end of the first limiting block. The third limiting block is arranged to the right of the second limiting block. An activity groove is provided at the upper right end of the second limiting block. The right side and the upper side of the activity groove are open. The activity groove is arranged among the first limiting block, the second limiting block, and the third limiting block. The movable block is arranged in the activity groove and can move left and right in the activity groove.

[0012] Further, a fourth limiting block is provided at the lower left end of the first structural block. The fourth limiting block is arranged outside the product injection mold cavity, and the fourth limiting block can be in limiting cooperation with the lower left part of the product injection mold cavity.

[0013] In summary, by applying the technical solution of the present invention, the following beneficial effects are achieved: The structure of the present invention is reasonably designed. (1) A first structural block is provided at the lower left of the product injection cavity. The first structural block can be inserted into the lower left end of the product injection cavity, so that the first structural block can form the internal structure of the lower left end of the product. (2) A second structural block, a third structural block, and a fourth structural block are arranged in sequence from top to bottom on the right side of the product injection cavity. The second structural block, the third structural block, and the fourth structural block can be inserted into the right end of the product injection cavity towards the left and cooperate with the first structural block, so that the second structural block, the third structural block, and the fourth structural block can not only form the internal structure of the right end of the product, but also cooperate with the first structural block to form an arc-shaped undercut in the product. (3) Since the second structural block, the third structural block, and the fourth structural block are independent of each other, they can enter or exit the right end of the product in a sequential manner. (4) From the above analysis, through the mutual cooperation of the first structural block, the second structural block, the third structural block, and the fourth structural block, the wax molding process can be cancelled and directly integrally formed, improving production efficiency and reducing the risk of appearance defects. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic cross-sectional structure diagram of the present invention;

[0015] Figure 2 is Figure 1 a partial enlarged schematic diagram of area A in

[0016] Figure 3 a schematic three-dimensional structure diagram of the present invention;

[0017] Figure 4 is a schematic cross-sectional structure diagram of the product produced by the present invention;

[0018] Description of the reference numerals: 1 - male mold, 2 - product injection cavity; 3 - first structural block, 301 - arc portion, 302 - fitting groove, 303 - fourth limit block; 4 - second structural block, 401 - step, 402 - first limit block, 403 - third limit block; 5 - third structural block, 501 - boss, 502 - arc groove, 503 - swing rod; 6 - fourth structural block, 601 - arc platform, 602 - second limit block, 603 - movable groove; 7 - runner, 8 - movable block, 9 - pin, 10 - glass bead screw, 11 - product, 12 - first driving device, 13 - second driving device, 14 - arc-shaped undercut. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, but this does not constitute a limitation to the protection scope of the present invention.

[0020] In the present invention, for a clearer description, the following explanations are made: When an observer observes, the left side of the observer is set as left, the right side of the observer is set as right, the front of the observer is set as front, the rear of the observer is set as rear, the upper side of the observer is set as upper, and the lower side of the observer is set as lower. It should be noted that the terms "front end", "rear end", "left side", "right side", "middle part", "upper side", "lower side", etc. in the text indicating the orientation or positional relationship are based on the orientation or positional relationship set in the accompanying drawings, and are only for the purpose of clearly describing the present invention, rather than indicating or implying that the structures or components referred to must have a specific orientation or be constructed in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", "fourth" are only used for the purpose of clear or simplified description, and cannot be understood as indicating or implying relative importance or quantity. Figure 1 Referring to

[0021] this embodiment provides an arc-shaped reverse buckle forming die, including a convex die 1 and a concave die (not shown in the figure). The convex die 1 and the concave die can be closed and opened. When the convex die 1 and the concave die are closed, the convex die 1 and the concave die enclose a product injection cavity 2. One end of the product injection cavity 2 extends towards the lower left, and the other end of the product injection cavity 2 extends towards the right. A first structural block 3 is provided at the lower left of the product injection cavity 2, and the first structural block 3 can be inserted into the lower left end of the product injection cavity 2. Second structural blocks 4, third structural blocks 5, and fourth structural blocks 6 are arranged in sequence from top to bottom on the right side of the product injection cavity 2. The second structural blocks 4, third structural blocks 5, and fourth structural blocks 6 can be inserted into the right end of the product injection cavity 2 towards the left and cooperate with the first structural block 3. A runner 7 extending outwards is provided on the left inner wall of the product injection cavity 2. Functions: (1) By providing a first structural block at the lower left of the product injection cavity, and the first structural block can be inserted into the lower left end of the product injection cavity, so that the first structural block can form the internal structure of the lower left end of the product; (2) By providing second structural blocks, third structural blocks, and fourth structural blocks arranged in sequence from top to bottom on the right side of the product injection cavity, and the second structural blocks, third structural blocks, and fourth structural blocks can be inserted into the right end of the product injection cavity towards the left and cooperate with the first structural block, so that the second structural blocks, third structural blocks, and fourth structural blocks can not only form the internal structure of the right end of the product, but also, by cooperating with the first structural block, can form the arc-shaped reverse buckle position 14 in the product 11; (3) Since the second structural blocks, third structural blocks, and fourth structural blocks are independent of each other, they can enter or exit the right end of the product in a sequential manner; (4) From the above analysis, through the mutual cooperation of the first structural block, second structural block, third structural block, and fourth structural block, the wax molding process can be cancelled and directly integrally formed, improving production efficiency and reducing the risk of poor appearance. Figures 1 to 4 ​

[0022] Specifically, an arc portion 301 is provided on one side of the upper right end of the first structural block 3 close to the runner 7, and a fitting groove 302 is provided on the other side of the upper right end of the first structural block 3 away from the runner 7. The left ends of the second structural block 4 and the third structural block 5 can be fitted into the fitting groove 302, and the upper and lower sides of the third structural block 5 are respectively fitted with the second structural block 4 and the fourth structural block 6. Function: Such a design can not only ensure that the first structural block can form a part of the arc undercut position of the product 11, but also enable the first structural block to be pulled outwards first during mold opening, and then the second structural block, the third structural block, and the fourth structural block can be pulled out.

[0023] Specifically, a step 401 with an opening facing downwards is provided at the lower left end of the second structural block 4. The left side of the step 401 is a horizontal plane, and the right side of the step 401 is an inclined plane that gradually slopes downwards from left to right; a boss 501 is provided at the upper left end of the third structural block 5. The left side of the boss 501 is a horizontal plane, and the right side of the boss 501 is an inclined plane that gradually slopes downwards from left to right; the step 401 is fitted with the boss 501. Function: Such a design not only facilitates the cooperation between the left end of the second structural block and the first structural block to form the arc undercut position of the product 11, but also facilitates pulling out the second structural block outwards first, and then pulling out the third structural block and the fourth structural block.

[0024] Specifically, an arc groove 502 with an opening facing downwards is provided at the lower left end of the third structural block 5. The left side of the arc groove 502 is an arc surface that gradually slopes upwards from left to right, and the right side of the arc groove 502 is an arc surface that gradually slopes downwards from left to right; an arc platform 601 is provided at the upper left end of the fourth structural block 6. The left side of the arc platform 601 is an arc surface that gradually slopes upwards from left to right, and the right side of the arc platform 601 is an arc surface that gradually slopes downwards from left to right; the arc platform 601 is fitted with the arc groove 502. Function: Such a design facilitates pulling out the second structural block outwards first, then lifting the third structural block upwards to disengage the fitting and pulling it outwards, and finally pulling out the fourth structural block outwards.

[0025] Specifically, a swing rod 503 is provided at the right end of the third structural block 5. The right end of the swing rod 503 extends to the outside of the product injection mold cavity 2 and is movably connected to the movable block 8 through a pin 9. The swing rod 503 can swing up and down around the pin 9, and the movable block 8 can drive the swing rod 503 to move left and right. During actual core pulling work (i.e., mold opening): Step 1: Pull out the first structural block to the lower left; Step 2: Pull out the second structural block to the right; Step 3: Pull out the fourth structural block to the right by a certain distance, so that the third structural block is lifted upwards and the swing rod swings upwards around the pin, and at this time the arc platform is disengaged from the arc groove; Step 4: The movable block moves to the right, thereby pulling out the third structural block to the right; Step 5: Pull out the fourth structural block to the right completely, thereby completing the core pulling work.

[0026] Specifically, a first limiting block 402 is provided at the right end of the second structural block 4. The first limiting block 402 is arranged outside the product injection mold cavity 2, and the first limiting block 402 can be in limiting cooperation with the upper right of the product injection mold cavity 2; a second limiting block 602 is provided at the right end of the fourth structural block 6. The second limiting block 602 is arranged outside the product injection mold cavity 2, and the second limiting block 602 can be in limiting cooperation with the lower right of the product injection mold cavity 2. Function: The amplitude of the leftward movement of the second structural block can be limited by the first limiting block, and the amplitude of the leftward movement of the fourth structural block can be limited by the second limiting block.

[0027] Specifically, a third limiting block 403 extending downward is provided at the right end of the first limiting block 402. The third limiting block 403 is arranged to the right of the second limiting block 602; a movable groove 603 is provided at the upper right end of the second limiting block 602. The right side and the upper side of the movable groove 603 are open. The movable groove 603 is arranged among the first limiting block 402, the second limiting block 602, and the third limiting block 403; a movable block 8 is arranged in the movable groove 603 and can move left and right in the movable groove 603. Function: Through the arrangement of the third limiting block, an activity cavity (i.e., the movable groove) can be enclosed with the second limiting block and the first limiting block. At the same time, the third limiting block is also convenient for connecting with a driving cylinder or an oil cylinder, etc.

[0028] Specifically, a fourth limiting block 303 is provided at the lower left end of the first structural block 3. The fourth limiting block 303 is arranged outside the product injection mold cavity 2, and the fourth limiting block 303 can be in limiting cooperation with the lower left of the product injection mold cavity 2. Function: By setting the fourth limiting block, the amplitude of the movement of the first structural block toward the product injection mold cavity can be limited.

[0029] Specifically, referring to Figure 3 , the fourth limiting block 303 of the first structural block is driven by a first driving device 12,, the third limiting block 403 of the second structural block is driven by a second driving device 13. The first driving device and the second driving device can be an oil cylinder or a cylinder.

[0030] Specifically, the left and right movement of the movable block 8 and the second limiting block can also be driven by a cylinder or an oil cylinder, and the specific structure can be selected according to actual needs.

[0031] In addition, the movable block 8 can be in cooperation with a ball screw 10, and the right end of the second limiting block 602 can also be connected to the third limiting block 403 through a set screw and a spring in sequence. The specific connection structure can be selected according to actual needs and will not be elaborated in detail here.

[0032] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. An arc-shaped reverse buckle forming die, comprising a convex mold (1) and a concave mold. The convex mold (1) and the concave mold can be closed and opened. When the convex mold (1) and the concave mold are closed, the convex mold (1) and the concave mold enclose a product injection cavity (2); characterized in that: One end of the product injection mold cavity (2) extends towards the lower left, and the other end of the product injection mold cavity (2) extends towards the right; a first structural block (3) is provided at the lower left of the product injection mold cavity (2), and the first structural block (3) can be inserted into the lower left end of the product injection mold cavity (2). On the right of the product injection mold cavity (2), a second structural block (4), a third structural block (5), and a fourth structural block (6) are arranged in sequence from top to bottom. The second structural block (4), the third structural block (5), and the fourth structural block (6) can be inserted towards the left into the right end of the product injection mold cavity (2) and cooperate with the first structural block (3). A runner (7) extending outwards is provided on the left inner wall of the product injection mold cavity (2); An arc-shaped groove (502) with an opening facing downwards is provided at the lower left end of the third structural block (5). The left side of the arc-shaped groove (502) is set as an arc surface that gradually slopes upwards from left to right, and the right side of the arc-shaped groove (502) is set as an arc surface that gradually slopes downwards from left to right; an arc-shaped platform (601) is provided at the upper left end of the fourth structural block (6). The left side of the arc-shaped platform (601) is set as an arc surface that gradually slopes upwards from left to right, and the right side of the arc-shaped platform (601) is set as an arc surface that gradually slopes downwards from left to right; the arc-shaped platform (601) is fitted with the arc-shaped groove (502); A swing rod (503) is provided at the right end of the third structural block (5). The right end of the swing rod (503) extends to the outside of the product injection mold cavity (2) and is movably connected to the movable block (8) through a pin (9). The swing rod (503) can swing up and down around the pin (9), and the movable block (8) can drive the swing rod (503) to move left and right.

2. The arc-shaped reverse buckle forming mold according to claim 1, wherein: An arc-shaped portion (301) is provided on one side of the upper right end of the first structural block (3) close to the runner (7), and a fitting groove (302) is provided on the side of the upper right end of the first structural block (3) far from the runner (7). The left ends of the second structural block (4) and the third structural block (5) can be fitted with the fitting groove (302), and the upper and lower sides of the third structural block (5) are respectively fitted with the second structural block (4) and the fourth structural block (6).

3. The arc-shaped reverse buckle forming die according to claim 2, characterized in that: A step (401) with an opening facing downwards is provided at the lower left end of the second structural block (4). The left side of the step (401) is set as a horizontal plane, and the right side of the step (401) is set as an inclined plane that gradually slopes downwards from left to right; a convex platform (501) is provided at the upper left end of the third structural block (5). The left side of the convex platform (501) is set as a horizontal plane, and the right side of the convex platform (501) is set as an inclined plane that gradually slopes downwards from left to right; the step (401) is fitted with the convex platform (501).

4. The arc-shaped reverse buckle position forming die according to claim 3, wherein: A first limiting block (402) is provided at the right end of the second structural block (4). The first limiting block (402) is arranged outside the product injection mold cavity (2), and the first limiting block (402) can be in limiting cooperation with the upper right of the product injection mold cavity (2); a second limiting block (602) is provided at the right end of the fourth structural block (6). The second limiting block (602) is arranged outside the product injection mold cavity (2), and the second limiting block (602) can be in limiting cooperation with the lower right of the product injection mold cavity (2).

5. The arc-shaped reverse buckle forming mold according to claim 4, characterized in that: A third limiting block (403) extending downward is provided at the right end of the first limiting block (402). The third limiting block (403) is arranged to the right of the second limiting block (602); a movable groove (603) is provided at the upper right end of the second limiting block (602). The right side and the upper side of the movable groove (603) are open. The movable groove (603) is arranged among the first limiting block (402), the second limiting block (602), and the third limiting block (403); the movable block (8) is arranged in the movable groove (603) and can move left and right in the movable groove (603).

6. The arc-shaped reverse buckle forming die according to any one of claims 1 to 5, characterized in that: A fourth limiting block (303) is provided at the lower left end of the first structural block (3). The fourth limiting block (303) is arranged outside the product injection mold cavity (2), and the fourth limiting block (303) can be in limiting cooperation with the lower left of the product injection mold cavity (2).

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