A small-space pendulum slanted top structure and method

Abstract

This invention relates to a small-space rocker arm inclined top structure and method, comprising a mold core, the top surface of which includes a sealing surface and a molding surface. Two molding inserts are slidably mounted on the mold core, both extending to the sealing surface. A lifting rocker arm is provided at the bottom end of each molding insert. Two mold core grooves are provided on the sealing surface, and a reset top block is slidably mounted within each groove. The sidewall of the mold core groove away from the corresponding molding insert is a guide slope. A top block slope coplanar with the guide slope is provided on the reset top block. An extension block is provided at the top of the reset top block, and a sliding rod is slidably mounted at the bottom end of the extension block. The reset top blocks, through the cooperation of the top block slope and the guide slope, cause the two reset top blocks to move downwards while simultaneously moving horizontally relative to each other, thereby bringing the two corresponding molding inserts together and completing the reset of the molding inserts. This structure is simple, occupies very little mold space, has strong applicability, is easy to assemble and disassemble, and has low manufacturing cost.

Description

Technical Field

[0001] This invention relates to the field of injection molds, and more specifically, to a small-space rocker arm inclined top structure and method. Background Technology

[0002] Currently, for plastic products with threaded column structures that form undercuts, molds generally use a slider structure. During mold opening, the slider moves the mold cores containing the threaded columns away from each other, facilitating product ejection. However, to prevent the product from sticking to the front mold and to ensure the threaded columns are located in the rear mold, a slider structure is often not feasible. In this case, a motor-driven insert rotates to detach from the threaded columns, allowing the product to be ejected. However, injection molds using motor-driven rotation and slider structures have large space requirements and high costs. Summary of the Invention

[0003] To address the aforementioned shortcomings of existing technologies, a small-space swing arm inclined top structure is provided.

[0004] The technical solution adopted by this invention to solve its technical problem is: a small-space swing rod inclined top structure, including a mold core, the top surface of which includes a sealing surface and a molding surface. Two molding inserts that cooperate to form threaded pillars are slidably mounted on the mold core. Both molding inserts extend to the sealing surface and are arranged opposite to each other. A lifting swing rod is provided at the bottom end of each molding insert. When the two lifting swing rods lift the molding inserts, they cause the two molding inserts to move away from each other. Two mold core grooves are provided on the sealing surface, corresponding to two molding inserts. At the ends of the inserts that are far apart from each other, a reset top block that abuts against the corresponding molded insert is slidably provided in the mold core groove. The side wall of the mold core groove away from the corresponding molded insert is a guide slope. The guide slope slopes from the bottom of the mold core groove to the top of the mold core groove away from the molded insert. The reset top block is provided with a top block slope that is coplanar with the guide slope. The top of the reset top block is provided with an extension block that extends away from the corresponding molded insert. The bottom end of the extension block is limited by a sliding rod that drives the extension block to rise and fall. The sliding rod slides back and forth along the extension direction of the extension block.

[0005] Preferably, the mold core is provided with two vertical mold core cavities, the molding insert is slidably disposed in the corresponding mold core cavity, the upper end of the lifting swing rod is also located in the corresponding mold core cavity, the lifting swing rod is located on the bottom surface of the molding insert away from the corresponding mold core groove, the side wall of the lifting swing rod away from the corresponding mold core groove is provided with a swing rod inclined surface, the swing rod inclined surface is inclined from bottom to top near the side of the corresponding mold core groove, and the mold core cavity is provided with cavity inclined surfaces that are parallel to and spaced apart from the swing rod inclined surface.

[0006] Preferably, the distance from the highest point of the rocker arm inclined surface to the highest point of the cavity inclined surface is greater than the height of the molding insert, the vertical height of the top block inclined surface of the reset top block is also greater than the height of the molding insert, and the vertical height of the top block inclined surface of the reset top block is also greater than the distance from the lowest point of the rocker arm inclined surface to the highest point of the cavity inclined surface.

[0007] Preferably, the shortest distance from the side wall where the mold core groove is located on the mold core cavity to the corresponding lifting swing rod is not less than the horizontal distance from the highest point of the swing rod inclined surface to the lowest point of the swing rod inclined surface.

[0008] Preferably, the bottom surface of the extension block is provided with a first sliding groove of T-shape, and a first sliding block of T-shape is slidably mounted in the first sliding groove, with the top end of the sliding rod connected to the first sliding block.

[0009] Preferably, the end of the first groove away from the corresponding molded insert is an open structure, and the extension block is provided with a stop block that blocks the opening of the first groove.

[0010] Preferably, the bottom end of the lifting swing rod is provided with a top rod, and the bottom end of the lifting swing rod is provided with a second sliding groove of T-shaped structure. A second sliding block of T-shaped structure is slidably arranged in the second sliding groove, and the top end of the top rod is connected to the second sliding block.

[0011] A method for tilting a pendulum in a small space, the method comprising the following steps:

[0012] S101, after the product is formed by the mold, the two lifting swing rods lift the corresponding forming inserts. At the same time, the two lifting swing rods drive the two corresponding forming inserts to move away from each other. At this time, the two sliding rods drive the corresponding reset top blocks to move upward synchronously through the extension blocks. The forming inserts drive the reset top blocks to move. At this time, the sliding rods slide relative to each other along the corresponding extension blocks.

[0013] S102, after the two molded inserts move away from each other and disengage from the threads of the product's threaded post, the mold will eject the product and demold it.

[0014] S103, after the product is ejected and demolded, the two lifting swing rods drive the corresponding molding inserts to descend, and at the same time the slide rod drives the corresponding reset top block to descend synchronously. At this time, the two reset top blocks move closer to each other with the cooperation of the top block inclined surface and the guide inclined surface. The two reset top blocks drive the corresponding two molding inserts to move closer to each other, thereby completing the reset of the molding inserts.

[0015] The beneficial effects of this invention are as follows: the lifting swing rod lifts the forming insert, and at this time the slide rod simultaneously lifts the reset top block through the extension block. At the same time, the lifting swing rod drives the two forming inserts to move away from each other, thereby facilitating product ejection and demolding. The forming inserts simultaneously drive the corresponding reset top blocks to slide to both sides. After the product is ejected, the lifting swing rod drives the forming inserts to move down, and the slide rod drives the reset top blocks to move down. At this time, the reset top blocks, through the top block inclined surface and the guide inclined surface, make the two reset top blocks move horizontally relative to each other while moving down, thereby making the two reset top blocks drive the corresponding two forming inserts to move closer to each other, completing the reset of the forming inserts. This structure is simple, occupies very little mold space, has strong applicability, is easy to disassemble and assemble, and has low manufacturing cost. Attached Figure Description

[0016] Figure 1 This is a cross-sectional structural schematic diagram of an embodiment of the present invention;

[0017] Figure 2 This is an embodiment of the present invention. Figure 1 Enlarged view of region A in the middle;

[0018] Figure 3 This is a schematic diagram of the overall structure of an embodiment of the present invention;

[0019] Figure 4 This is an embodiment of the present invention. Figure 3 Enlarged view of region B in the middle;

[0020] Figure 5 This is a schematic diagram of the mold core structure according to an embodiment of the present invention;

[0021] Figure 6 This is a schematic diagram of the reset top block and extension block structure according to an embodiment of the present invention;

[0022] Figure 7 This is a partial structural schematic diagram of the product according to an embodiment of the present invention.

[0023] Reference numerals: 1 Mold core, 10 Sealing surface, 11 Molding surface, 12 Mold core groove, 13 Guide slope, 2 Molding insert, 3 Lifting rocker arm, 30 Rocker arm slope, 31 Second slide groove, 4 Reset ejector block, 40 Ejector block slope, 5 Extension block, 50 First slide groove, 51 Stop block, 6 Slide rod, 60 First slider, 7 Mold core cavity, 70 Cavity slope, 8 Ejector rod, 80 Second slider. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below in conjunction with the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are some embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present invention. In addition, the directional terms mentioned in the present invention, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying illustrations. The use of directional terms is for better and clearer explanation and understanding of the present invention, and is not intended to indicate or imply any necessary orientation of the present invention, and therefore should not be construed as a limitation of the present invention.

[0025] Examples of embodiments of the present invention Figures 1 to 7 As shown, a small-space sway bar inclined top structure includes a mold core 1. The top surface of the mold core 1 includes a sealing surface 10 and a molding surface 11. The sealing surface 10 prevents molten plastic from flowing out of the cavity, while the molding surface 11 is used to mold the product. Two molding inserts 2 that cooperate to form threaded columns are slidably mounted on the mold core 1. Both molding inserts 2 extend to the sealing surface 10 and are arranged opposite each other in the left-right direction. A lifting sway bar 3 is provided at the bottom end of each molding insert 2. When the two lifting sway bars 3 lift the molding inserts 2, they cause the two molding inserts 2 to move away from each other, that is, when the two lifting sway bars 3 lift the molding inserts 2, they cause the two molding inserts 2 to move to the left and right respectively. Two mold core grooves 12 are provided on the sealing surface 10. The two mold core grooves 12 are located at the ends of the two molding inserts 2 that are far apart from each other, that is, the two mold core grooves 12 are located at the left end of the left molding insert 2 and the right end of the right molding insert 2 respectively. At the right end of 2, a reset top block 4 is slidably provided in the mold core groove 12 to abut against the corresponding molding insert 2. The side wall of the mold core groove 12 away from the corresponding molding insert 2 is a guide slope 13, that is, the left side wall of the left mold core groove 12 is a guide slope 13, and the right side wall of the right mold core groove 12 is also a guide slope 13. The guide slope 13 is inclined from the bottom of the mold core groove 12 to the top of the mold core groove 12 away from the molding insert 2. The reset top block 4 is provided with a... The top block slope 40 is coplanar with the guide slope 13. The top of the reset top block 4 is provided with an extension block 5 extending away from the corresponding molding insert 2. The sealing surface 10 of the mold core 1 is provided with a clearance notch to avoid the extension block 5. The extension block 5 is located in the clearance notch. Preferably, the top surface of the extension block 5 is coplanar with the sealing surface 10 of the mold core 1. The bottom end of the extension block 5 is limited and slidably provided with a slide rod 6 to drive the extension block 5 to rise and fall. The slide rod 6 slides back and forth along the extension direction of the extension block 5.

[0026] The lifting swing rod 3 lifts the forming insert 2. At this time, the sliding rod 6 simultaneously lifts the reset top block 4 through the extension block 5. At the same time, the lifting swing rod 3 drives the two forming inserts 2 to move away from each other, that is, the two forming inserts 2 move to the left and right sides respectively. The forming inserts 2 disengage from the threads of the threaded post on the product, thereby facilitating the product ejection and demolding. The forming inserts 2 simultaneously drive the corresponding reset top block 4 to slide to the sides. After the product is ejected, the lifting swing rod 3 drives the forming inserts 2 to move down, and the sliding rod 6 drives the reset top block 4 to move down. At this time, the reset top block 4, through the top block inclined surface 40 and the guide inclined surface 13, makes the two reset top blocks 4 move horizontally relative to each other while moving down, so that the two reset top blocks 4 bring the corresponding two forming inserts 2 together, completing the reset of the forming inserts 2. This structure is simple, occupies very little mold space, has strong applicability, is easy to disassemble and assemble, and has low manufacturing cost.

[0027] Further improvements, such as Figure 1 and Figure 5 As shown, the mold core 1 is provided with two vertical mold core cavities 7. The molding insert 2 is slidably disposed in the corresponding mold core cavity 7. The upper end of the lifting swing rod 3 is also located in the corresponding mold core cavity 7. The lifting swing rod 3 is located on the side of the bottom surface of the molding insert 2 away from the corresponding mold core groove 12. That is, the left lifting swing rod 3 is located on the right side of the bottom surface of the left molding insert 2, and the right lifting swing rod 3 is located on the left side of the bottom surface of the right molding insert 2. The side wall of the lifting swing rod 3 away from the corresponding mold core groove 12 is provided with a swing rod inclined surface 30. The swing rod inclined surface 30 is provided from... The upper side of the mold core is inclined towards the corresponding groove 12. That is, the left side wall of the right lifting swing rod 3 is provided with a swing rod inclined surface 30. At this time, the swing rod inclined surface 30 is inclined from the lower left to the upper right. The right side wall of the left lifting swing rod 3 is provided with a swing rod inclined surface 30. At this time, the swing rod inclined surface 30 is inclined from the lower right to the upper left. The mold core cavity 12 is provided with cavity inclined surfaces 70 that are parallel to and spaced apart from the swing rod inclined surface 30. That is, the left inner side wall of the right mold core cavity 7 is provided with a cavity inclined surface 70, and the right inner side wall of the left mold core cavity 7 is also provided with a cavity inclined surface 70.

[0028] Further improvements, such as Figure 1As shown, the distance from the highest point of the rocker arm inclined surface 30 to the highest point of the cavity inclined surface 70 is greater than the height of the molding insert 2. This allows the molding insert 2 to be fully lifted out of the corresponding mold cavity before moving horizontally, without the mold core 1 interfering with the horizontal movement of the molding insert 2. The vertical height of the top block inclined surface 40 of the reset top block 4 is also greater than the height of the molding insert 2. The vertical height of the top block inclined surface 40 of the reset top block 4 is also greater than the distance from the lowest point of the rocker arm inclined surface 30 to the highest point of the cavity inclined surface 70. This allows the reset top block 4 to guide the molding insert 2 through the top block inclined surface 40. The inclined plane 13 moves horizontally, so that the reset top block 4 first resets the molding insert 2 horizontally, so that the molding insert 2 will not contact the sealing surface 10 of the mold core 1, avoiding wear of the sealing surface 10 and leakage of glue, forming burrs and defects. The shortest distance from the side wall where the mold core groove 12 is located on the mold core cavity 7 to the corresponding lifting rocker arm 3 is not less than the horizontal distance from the highest point of the rocker arm inclined plane 30 to the lowest point of the rocker arm inclined plane 30. This ensures that the rocker arm inclined plane 30 and the cavity inclined plane 70 can make the molding insert 2 move horizontally a sufficient distance, thereby ensuring that the molding insert 2 disengages from the threaded post on the product after molding.

[0029] Further improvements, such as Figure 1 , Figure 2 and Figure 6 As shown, a T-shaped first sliding groove 50 is provided on the bottom surface of the extension block 5. The first sliding groove 50 extends in the left and right direction. A T-shaped first slider 60 is slidably arranged in the first sliding groove 50. The top end of the sliding rod 6 is connected to the first slider 60. The sliding rod 6 and the first slider 60 are integrally formed. When the sliding rod 6 lifts or pulls to lower the extension block 5, it does not affect the left and right movement of the extension block 5.

[0030] Further improvements, such as Figure 1 and Figure 2 As shown, the end of the first slide groove 50 away from the corresponding molded insert 2 is an open structure. The extension block 5 is provided with a stop block 51 that blocks the opening of the first slide groove 50. Preferably, the stop block 51 and the extension block 5 are detachably connected. The stop block 51 and the extension block 5 can be connected by screws, so as to facilitate the installation of the integrally molded slide rod 6 and the first slider 60. The stop block 51 prevents the slide rod 6 from sliding out of the first slide groove 50.

[0031] Further improvements, such as Figure 3 and Figure 4 As shown, the bottom end of the lifting swing arm 3 is provided with a top rod 8, and the bottom end of the lifting swing arm 3 is provided with a second sliding groove 31 of T-shaped structure. A second sliding block 80 of T-shaped structure is slidably arranged in the second sliding groove 31. The top end of the top rod 8 is connected to the second sliding block 80. The top rod 8 and the second sliding block 80 are integrally formed, which allows the left and right movement of the lifting swing arm 3 to be unaffected when the top rod 8 lifts or pulls the lifting swing arm 3 to lower it.

[0032] A method for tilting a pendulum in a small space, the method comprising the following steps:

[0033] S101, after the mold forms the product, the two lifting swing rods 3 lift the corresponding forming inserts 2. At the same time, the two lifting swing rods 3 drive the corresponding two forming inserts 2 to move away from each other. At this time, the two sliding rods 6 drive the corresponding reset top blocks 4 to move upward synchronously through the extension blocks 5. The forming inserts 2 drive the corresponding reset top blocks 4 to move. At this time, the sliding rods 6 slide relative to each other along the corresponding extension blocks 5.

[0034] S102, after the two molded inserts 2 move away from each other and disengage from the threads of the product's threaded post, the mold will eject the product and demold it.

[0035] S103, after the product is ejected and demolded, the two lifting swing rods 3 drive the corresponding molding inserts 2 to descend, and at the same time the sliding rod 3 drives the corresponding reset top block 1 to descend synchronously. At this time, the two reset top blocks 4 approach each other with the cooperation of the top block inclined surface 40 and the guide inclined surface 13. The two reset top blocks 4 drive the corresponding two molding inserts 2 to approach each other, thereby completing the reset of the molding inserts 2.

[0036] It should be understood that those skilled in the art can make improvements or modifications based on the above description, and all such improvements and modifications should fall within the protection scope of the appended claims.

Claims

1. A small-space swing rod inclined top structure, comprising a mold core; characterized in that, The top surface of the mold core includes a sealing surface and a molding surface; two molding inserts that cooperate to form threaded pillars are slidably mounted on the mold core; both molding inserts extend to the sealing surface; the two molding inserts are arranged opposite to each other; each molding insert has a lifting lever at its bottom end; when the two lifting levers lift the molding inserts, they cause the two molding inserts to move away from each other; two mold core grooves are provided on the sealing surface; the two mold core grooves are located at the opposite ends of the two molding inserts; a reset top block that abuts against the corresponding molding insert is slidably mounted in the mold core groove; the side wall of the mold core groove away from the corresponding molding insert is a guide slope; the guide slope slopes from the bottom of the mold core groove to the top of the mold core groove away from the molding insert; the reset top block has a top block slope that is coplanar with the guide slope; the top of the reset top block has a slope that moves away from the opposite side. An extension block extending from one side of the molding insert is provided; a sliding rod that drives the extension block to rise and fall is provided at the bottom end of the extension block; the sliding rod slides back and forth along the extension direction of the extension block; two vertical mold core cavities are provided on the mold core; the molding insert is slidably fitted into the corresponding mold core cavity; the upper end of the lifting swing rod is also located in the corresponding mold core cavity; the lifting swing rod is located on the bottom surface of the molding insert away from the corresponding mold core groove; a swing rod inclined surface is provided on the side wall of the lifting swing rod away from the corresponding mold core groove; the swing rod inclined surface is inclined from bottom to top towards the side of the corresponding mold core groove; the mold core cavity is provided with cavity inclined surfaces parallel to and spaced apart from the swing rod inclined surface; a first sliding groove with a T-shaped structure is provided on the bottom surface of the extension block; a first sliding block with a T-shaped structure is slidably fitted into the first sliding groove; the top end of the sliding rod is connected to the first sliding block.

2. The small-space swing rod inclined top structure according to claim 1, characterized in that, The distance from the highest point of the rocker arm's inclined surface to the highest point of the cavity's inclined surface is greater than the height of the molded insert; the vertical height of the top block's inclined surface of the reset top block is also greater than the height of the molded insert; the vertical height of the top block's inclined surface of the reset top block is also greater than the distance from the lowest point of the rocker arm's inclined surface to the highest point of the cavity's inclined surface.

3. The small-space swing rod inclined top structure according to claim 1, characterized in that, The shortest distance from the side wall where the mold core groove is located on the mold core cavity to the corresponding lifting swing rod is not less than the horizontal distance from the highest point of the swing rod inclined surface to the lowest point of the swing rod inclined surface.

4. The small-space swing rod inclined top structure according to claim 1, characterized in that, The end of the first groove away from the corresponding molded insert is an open structure; the extension block is provided with a stop block that blocks the opening of the first groove.

5. The small-space swing rod inclined top structure according to claim 1, characterized in that, The bottom end of the lifting swing rod is provided with a top rod; the bottom end of the lifting swing rod is provided with a second sliding groove of T-shaped structure; a second sliding block of T-shaped structure is slidably arranged in the second sliding groove; the top end of the top rod is connected to the second sliding block.

6. A method for tilting a pendulum in a small space, based on a tilting structure for a pendulum in a small space as described in any one of claims 1-5, characterized in that, The method includes the following steps: S101, after the product is formed by the mold, the two lifting swing rods lift the corresponding forming inserts. At the same time, the two lifting swing rods drive the two corresponding forming inserts to move away from each other. At this time, the two sliding rods drive the corresponding reset top blocks to move upward synchronously through the extension blocks. The forming inserts drive the reset top blocks to move. At this time, the sliding rods slide relative to the corresponding extension blocks. S102, after the two molded inserts move away from each other and disengage from the threads of the product's threaded post, the mold will eject the product and demold it. S103, after the product is ejected and demolded, the two lifting swing rods drive the corresponding molding inserts to descend, and at the same time the slide rod drives the corresponding reset top block to descend synchronously. At this time, the two reset top blocks move closer to each other with the cooperation of the top block inclined surface and the guide inclined surface. The two reset top blocks drive the corresponding two molding inserts to move closer to each other, thereby completing the reset of the molding inserts.

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