Mold structure capable of automatically adjusting distance between insert pins

Abstract

The invention relates to the technical field of injection molds, in particular to a mold structure capable of automatically adjusting insert pin spacing, which comprises a mold body, a cavity is formed in the mold body, a rotating hole is further formed in the mold body, the rotating hole is positioned below the cavity, the rotating hole is communicated with the cavity, and a rotating table is rotatably mounted in the rotating hole; the upper surface of the rotating table is flush with the surface of the cavity, an insert pin is installed on the upper surface of the rotating table and deviates from the axis of the rotating table, an installation cavity is further formed in the mold body, located below the rotating hole and communicated with the rotating hole, and a driving device for driving the rotating table to reset is arranged in the installation cavity and connected with the bottom face of the rotating table. The insert pin can move to a certain extent to adapt to the position displacement of the forming hole in the cooling shrinkage process after the plastic material is subjected to injection molding, and the insert pin is prevented from being broken.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and more specifically to a mold structure capable of automatically adjusting the spacing between insert pins. Background Art

[0002] In plastic products, injection molding is generally used to manufacture them. Molten raw materials are injected into the mold, and then the raw materials are cooled and formed before demolding to obtain plastic products. In this process, it is generally necessary to set a pin in the mold cavity. During the cooling and solidification of the raw materials, the pins are suspended in the cavity, lacking support, and break under the action of external force. In the process of cooling and solidification of the raw materials, when the raw materials are cooled to a certain extent, solid, non-deformable pin holes will be formed to accommodate the pins. After that, the raw materials continue to cool. Affected by the thermal expansion and contraction properties of the material itself, the raw materials will shrink as a whole during the cooling process. Therefore, the position of the pin holes in the raw materials will also change accordingly. In particular, the shrinkage rate of PE materials is large, and the position of the pin holes changes greatly. The pin is fixed inside the cavity and its position cannot be changed, and the hole cannot be deformed. Therefore, after the raw material shrinks, the pin hole and the pin collide with each other. When the raw material shrinks too much and the pin is not strong enough to resist the shrinkage force of the product, the pin will bend or even break, which will have a negative impact on the product and the mold body and increase the loss cost in the manufacturing process. Reprocessing and replacing broken pins takes too long, which seriously affects the production schedule. Summary of the invention

[0003] In order to solve the problem in the prior art, the present invention provides a mold structure which can automatically adjust the spacing between insert pins. The insert pins can move to a certain extent to adapt to the position displacement of the molding holes during the cooling and shrinkage process of the plastic material after injection molding, thereby avoiding the breakage of the insert pins.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a mold structure that can automatically adjust the spacing between inlay pins, including a mold body, a mold body having a mold cavity, and a mold body also having a rotating hole, the rotating hole is located below the mold cavity, the rotating hole and the mold cavity are communicated, a rotating table is rotatably installed in the rotating hole, the upper surface of the rotating table is flush with the surface of the mold cavity, an inlay pin is installed on the upper surface of the rotating table, the inlay pin deviates from the axis of the rotating table, an installation cavity is also provided inside the mold body, the installation cavity is located below the rotating hole and is communicated with the rotating hole, a driving device for driving the rotating table to reset is provided in the installation cavity, and the driving device is connected to the bottom surface of the rotating table.

[0005] In the present technical solution, the cavity on the mold body is used to accommodate the raw material in a molten state and determine the external shape of the raw material, so that the shape of the raw material after cooling and solidifying can match the shape of the cavity, thereby obtaining a product with a determined shape. While the raw material is cooling and solidifying, an inlay pin needs to be arranged in the cavity. When the raw material is cooling and solidifying, the inlay pin is inserted into the raw material. After the raw material is cooled and solidified, an inlay pin hole will be left at the position of the inlay pin. In order to adapt to the shrinkage of the raw material during the cooling and solidification process, which leads to the change of the position of the inlay pin hole, a rotating hole is opened on the surface of the cavity, and a rotating table can be rotatably installed in the rotating hole, and the inlay pin is installed on the upper surface of the rotating table. The shrinkage of the raw material during cooling and solidification makes the movement of the pin hole on the horizontal plane simplified to shrinkage in two mutually perpendicular directions, X and Y. Since the pin deviates from the axis of the turntable, the position of the pin in the X and Y directions will also change with the rotation of the turntable. After the position of the pin hole changes due to the shrinkage of the raw material, the wall of the pin hole conflicts with the pin, and then the turntable is driven to rotate by the pin, so that while ensuring that the pin is firmly installed in the cavity, it can adapt to the change of the position of the pin hole to a certain extent through movement, so that the pin is not easy to bend or break. In addition, the rotation of the turntable in this process is driven by the shrinkage of the raw material itself, and no manual adjustment is required. Finally, after the raw material is cooled and solidified to form a product, the product is taken out of the cavity, and then the staff can control the rotation of the turntable by controlling the driving device, so that after the product production is completed, the driving device can drive the turntable to rotate and drive the pin back to the standard position to ensure that the position of the pin meets the requirements. Since the top surface of the turntable participates in the formation of the cavity for determining the external shape of the product, in order to ensure that it does not affect the product, the driving device is set to be connected to the bottom surface of the turntable. The rotating table is inserted into the mold body, and the driving device connected with the bottom surface of the rotating table needs to pass through the mold body, so it is necessary to set a mounting cavity in the mold body to accommodate the driving device.

[0006] Preferably, a first bearing is installed in the rotating hole, and the rotating platform is supported on the first bearing.

[0007] Preferably, a thrust ball bearing is arranged in the rotating hole, and the bottom surface of the rotating table is supported on the thrust ball bearing.

[0008] Preferably, the insert pin is detachably connected to the rotating table.

[0009] Preferably, the driving device includes a swing rod, a push rod and a driving member, a rotating shaft is fixed to the bottom surface of the rotating table, the bottom end of the rotating shaft is inserted into the mounting cavity, one end of the rotating shaft inserted into the mounting cavity is fixedly connected to the swing rod, the push rod can be slidably installed in the mounting cavity, the push rod is aligned with the swing rod, the driving member is installed on the mold body, and the driving member is connected to the push rod.

[0010] Preferably, the driving member is an oil cylinder, and the telescopic end of the oil cylinder is fixedly connected to the push rod.

[0011] Preferably, a second bearing is installed at the bottom end of the rotating hole, and the rotating shaft is supported on the second bearing.

[0012] Preferably, the mold body includes a mold body main body and a bottom plate, the bottom surface of the mold body main body is detachably connected to the bottom plate, the cavity is opened on the upper surface of the mold body main body, the rotating hole is communicated with the bottom surface of the mold body main body, the upper surface of the bottom plate is provided with a mounting groove, the swing rod and the push rod are both located in the mounting groove, and the mounting groove and the mold body are assembled to form the mounting cavity.

[0013] Preferably, the mounting groove includes a swing groove and a slide groove, the swing groove corresponds to the swing rod, the push rod can be slidably mounted in the slide groove, and the slide groove is connected to the swing groove.

[0014] Preferably, a side wall surface of the swing groove away from the push rod is an abutment surface, and the abutment surface abuts against the swing rod when the insert pin is in a standard position.

[0015] Compared with the prior art, the invention has the following beneficial effects: a rotating hole is provided to communicate with the mold cavity, a rotating table is provided in the rotating hole, and the inlay pin is installed on the rotating table away from the axis of the rotating table. The rotating table can not only install the inlay pin, but also adapt the movement of the inlay pin in the X and Y directions by rotating, so that the inlay pin is not easy to break or bend, thereby saving the material cost and time cost of replacing the inlay pin. At the same time, the rotation of the rotating table is completely driven by the contraction of the raw material, and no manual drive is required. A driving device is provided to automatically rotate the rotating table after the product is manufactured to complete the reset of the inlay pin, which is easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the mold structure capable of automatically adjusting the spacing between insert pins of the present invention;

[0017] Figure 2 It is a half-section diagram of the mold structure capable of automatically adjusting the spacing between insert pins of the present invention;

[0018] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0019] Figure 4 It is a three-dimensional diagram of the mold structure capable of automatically adjusting the spacing between insert pins of the present invention after the A plate is removed;

[0020] Figure 5 It is a stereoscopic diagram of a rotating table and a driving device in a mold structure capable of automatically adjusting the spacing between insert pins of the present invention.

[0021] In the accompanying drawings: 1. mold body; 2. mold cavity; 3. rotating table; 4. insert pin; 5. thrust ball bearing; 6. driving device; 11. mounting cavity; 12. mold body; 13. bottom plate; 14. swing groove; 15. slide groove; 16. abutment surface; 21. rotating hole; 31. first bearing; 32. rotating shaft; 33. second bearing; 61. swing rod; 62. push rod; 63. driving member. DETAILED DESCRIPTION

[0022] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0023] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0024] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0025] Example 1

[0026] like Figure 1As shown, a mold structure capable of automatically adjusting the spacing between inlay pins comprises a mold body 1, a mold body 1 having a mold cavity 2, a mold body 1 also having a rotating hole 21, the rotating hole 21 being located below the mold cavity 2, the rotating hole 21 and the mold cavity 2 being connected, a rotating table 3 being rotatably installed in the rotating hole 21, the upper surface of the rotating table 3 being flush with the surface of the mold cavity 2, an inlay pin 4 being installed on the upper surface of the rotating table 3, the inlay pin 4 being offset from the axis of the rotating table 3, an installation cavity 11 being also provided inside the mold body 1, the installation cavity 11 being located below the rotating hole 21 and being connected to the rotating hole 21, a driving device 6 for driving the rotating table 3 to reset being provided in the installation cavity 11, the driving device 6 being connected to the bottom surface of the rotating table 3. The mold cavity 2 on the mold body 1 is used to accommodate raw materials in a molten state and determine the external shape of the raw materials, so that the shape of the raw materials after cooling and solidification can match the shape of the mold cavity 2, thereby obtaining a product with a determined shape. While the raw materials are cooling and solidifying, an inlay pin 4 needs to be provided in the mold cavity 2. When the raw material is cooled and solidified, the inlay pin 4 is inserted into the raw material. After the raw material is cooled and solidified, a hole for the inlay pin 4 is left at the position of the inlay pin 4. In order to adapt to the shrinkage of the raw material during the cooling and solidification process, which leads to the change of the position of the hole for the inlay pin 4, a rotating hole 21 is opened on the surface of the cavity 2, and a rotating table 3 can be rotatably installed in the rotating hole 21, and the inlay pin 4 is installed on the upper surface of the rotating table 3. The shrinkage of the raw material during cooling and solidification makes the movement of the hole for the inlay pin 4 simplified to contraction in two mutually perpendicular directions, X and Y, on the horizontal plane. Since the inlay pin 4 deviates from the axis of the rotating table 3, the position of the inlay pin 4 in the X and Y directions will also change with the rotation of the rotating table 3. After the position of the hole for the inlay pin 4 changes due to the shrinkage of the raw material, the hole wall of the inlay pin 4 collides with the inlay pin 4, and then the rotating table 3 is driven to rotate by the inlay pin 4, so that while ensuring that the inlay pin 4 is firmly installed in the cavity 2, it can adapt to the change of the position of the hole for the inlay pin 4 to a certain extent through movement, so that the inlay pin 4 is not easy to bend or break. And the rotation of the turntable 3 in this process is driven by the contraction of the raw material itself, and no manual adjustment is required. After the raw material is finally cooled and solidified to form a product, the product is taken out of the cavity 2, and then the staff can control the rotation of the turntable 3 by controlling the driving device 6, so that after the product production is completed, the driving device 6 can drive the turntable 3 to rotate and drive the insert pin 4 back to the standard position to ensure that the position of the insert pin 4 meets the requirements. Since the top surface of the turntable 3 participates in the formation of the cavity 2 for determining the external shape of the product, in order to ensure that there is no impact on the product, the driving device 6 is arranged to be connected to the bottom surface of the turntable 3. The turntable 3 is inserted into the mold body 1, and the driving device 6 needs to pass through the mold body 1 to connect with the bottom surface of the turntable 3, so it is necessary to set an installation cavity 11 in the mold body 1 to accommodate the driving device 6.

[0027] like Figure 2 , 4As shown, a first bearing 31 is installed in the rotating hole 21, and the rotating table 3 is supported on the first bearing 31. The first bearing 31 can reduce the friction between the side wall of the rotating table 3 and the hole wall of the rotating hole 21, so that the rotating table 3 is easier to rotate in the rotating hole 21, so that the setting pin 4 is subjected to a smaller force, and the load borne by the setting pin 4 can be reduced by rotating the rotating table 3, thereby protecting the setting pin 4 and preventing it from breaking easily. At the same time, the first bearing 31 supports the position of the rotating table 3.

[0028] like Figure 2 , 4 As shown, a thrust ball bearing 5 is arranged in the rotating hole 21, and the bottom surface of the rotating table 3 is supported on the thrust ball bearing 5. The thrust ball bearing 5 reduces the friction between the bottom surface of the rotating table 3 and the bottom surface of the rotating hole 21, making it easier for the rotating table 3 and the rotating hole 21 to rotate.

[0029] like Figure 2 , 4 As shown, the inserting needle 4 is detachably connected to the rotating platform 3. When the inserting needle 4 fails, the staff can directly remove the inserting needle 4 from the rotating platform 3 to replace the inserting needle 4.

[0030] Example 2

[0031] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 2 , 4 As shown, the driving device 6 includes a swing rod 61, a push rod 62 and a driving member 63. A rotating shaft 32 is fixed to the bottom surface of the rotating table 3. The bottom end of the rotating shaft 32 is inserted into the mounting cavity 11. One end of the rotating shaft 32 inserted into the mounting cavity 11 is fixedly connected to the swing rod 61. The push rod 62 can be slidably installed in the mounting cavity 11. The push rod 62 is aligned with the swing rod 61. The driving member 63 is installed on the mold body 1, and the driving member 63 is connected to the push rod 62. The end of the rotating shaft 32 extending into the mounting cavity 11 is fixedly provided with a swing rod 61. The rotation of the rotating table 3 will drive the rotating shaft 32 and then drive the swing rod 61 to swing. The mounting cavity 11 has enough space for the swing rod 61 to swing. A push rod 62 is also slidably connected in the installation cavity 11. When the product production is completed and the product is taken out from the cavity 2, the staff pushes the push rod 62 to slide in the installation cavity 11. The push rod 62 is aligned with the swing rod 61. The push rod 62 will come into contact with the swing rod 61 during the sliding process, and then continue to push the swing rod 62. The push rod 62 pushes the swing rod 61 to swing and then drives the connecting shaft 32 and the rotating table 3 to rotate, and finally drives the position of the inserting needle 4 to change. When the inserting needle 4 moves to the standard position, the staff withdraws the push rod 62 to ensure that the push rod 62 will not affect the subsequent changes in the position of the inserting needle 4, and finally completes the resetting of the inserting needle 4.

[0032] like Figure 4As shown, the driving member 63 is a cylinder, and the telescopic end of the cylinder is fixedly connected to the push rod 62. The cylinder can drive the push rod 62 to slide in the installation cavity 11 through telescopic movement, and then drive the swing rod 61 to swing so that the inserting pin 4 is reset, realizing the automation of the reset process of the inserting pin 4.

[0033] like Figure 3 As shown, a second bearing 33 is installed at the bottom end of the rotating hole 21, and the rotating shaft 32 is supported on the second bearing 33. The second bearing 33 is provided to support the connecting shaft 32, so that the connecting shaft 32 does not swing in the gap between the connecting shaft 32 and the rotating hole 21. On the other hand, the second bearing 33 reduces the friction between the connecting shaft 32 and the rotating hole 21.

[0034] Example 3

[0035] This embodiment is similar to the above-mentioned embodiment 1, except that: Figure 2 As shown, the mold body 1 includes a mold body main body 12 and a bottom plate 13, the bottom surface of the mold body main body 12 is detachably connected to the bottom plate 13, the mold cavity 2 is opened on the upper surface of the mold body main body 12, the rotating hole 21 is connected to the bottom surface of the mold body main body 12, and the upper surface of the bottom plate 13 is provided with a mounting groove, the swing rod 61 and the push rod 62 are both located in the mounting groove, and the mounting groove and the mold body 12 are assembled to form a mounting cavity 11. By setting the mold body main body 12 and the bottom plate 13, the mold body 1 can be disassembled, and then the mounting cavity 11 is exposed, which is convenient for installing and replacing the driving device 6 and the rotating table 3. At the same time, compared with integrated molding, splitting the mold body 1 into the mold body main body 12 and the bottom plate 13 is conducive to reducing processing difficulty and manufacturing costs.

[0036] like Figure 5 As shown, the installation groove includes a swing groove 14 and a slide groove 15, the swing groove 14 corresponds to the swing rod 61, the push rod 62 can be slidably installed in the slide groove 15, the slide groove 15 is connected to the swing groove 14, the swing groove 14 provides space for the swing of the swing rod 61, and the slide groove 15 limits the sliding direction of the push rod 62 to slide only along the length direction of the slide groove 15, ensuring that the moving direction of the push rod 62 is determined. The slide groove 15 is connected to the swing groove 14, and the push rod 62 can extend into the swing groove 14 through the connection between the slide groove 15 and the swing groove 14 to push the swing rod 61 to swing.

[0037] like Figure 5 As shown, the side wall surface of the swing groove 14 away from the push rod 62 is the abutment surface 16, and the abutment surface 16 abuts against the swing rod 61 when the inserting pin 4 is in the standard position. When the inserting pin 4 needs to be reset, it is only necessary to make the swing rod 61 abut against the abutment surface 16 to confirm that the position of the inserting pin 4 is accurate. The confirmation process is simple and fast, which facilitates the rapid and accurate reset of the inserting pin 4.

[0038] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A mold structure capable of automatically adjusting the spacing between insert pins, characterized in that: The mold body (1) comprises a mold body (1), a mold cavity (2) is provided on the mold body (1), a rotating hole (21) is provided on the mold body (1), the rotating hole (21) is located below the mold cavity (2), the rotating hole (21) is connected to the mold cavity (2), a rotating table (3) is rotatably installed in the rotating hole (21), the upper surface of the rotating table (3) is flush with the surface of the mold cavity (2), an inlay pin (4) is installed on the upper surface of the rotating table (3), the inlay pin (4) is offset from the axis of the rotating table (3), an installation cavity (11) is also provided inside the mold body (1), the installation cavity (11) is located below the rotating hole (21) and is connected to the rotating hole (21), a driving device (6) for driving the rotating table (3) to reset is provided in the installation cavity (11), and the driving device (6) is connected to the bottom surface of the rotating table (3).

2. A mold structure capable of automatically adjusting the spacing between insert pins according to claim 1, characterized in that: A first bearing (31) is installed in the rotating hole (21), and the rotating platform (3) is supported on the first bearing (31).

3. A mold structure capable of automatically adjusting the spacing between insert pins according to claim 1, characterized in that: A thrust ball bearing (5) is arranged in the rotating hole (21), and the bottom surface of the rotating platform (3) is supported on the thrust ball bearing (5).

4. A mold structure capable of automatically adjusting the spacing between insert pins according to claim 1, characterized in that: The insert pin (4) is detachably connected to the rotating platform (3).

5. The mold structure capable of automatically adjusting the spacing between insert pins according to claim 1, characterized in that: The driving device (6) comprises a swing rod (61), a push rod (62) and a driving member (63); a rotating shaft (32) is fixed to the bottom surface of the rotating table (3); the bottom end of the rotating shaft (32) is inserted into the mounting cavity (11); one end of the rotating shaft (32) inserted into the mounting cavity (11) is fixedly connected to the swing rod (61); the push rod (62) can be slidably installed in the mounting cavity (11); the push rod (62) is aligned with the swing rod (61); the driving member (63) is installed on the mold body (1); and the driving member (63) is connected to the push rod (62).

6. A mold structure capable of automatically adjusting the spacing between insert pins according to claim 5, characterized in that: The driving member (63) is an oil cylinder, and the telescopic end of the oil cylinder is fixedly connected to the push rod (62).

7. The mold structure capable of automatically adjusting the spacing between insert pins according to claim 5, characterized in that: A second bearing (33) is installed at the bottom end of the rotating hole (21), and the rotating shaft (32) is supported on the second bearing (33).

8. The mold structure capable of automatically adjusting the distance between insert pins according to claim 5, characterized in that: The mold body (1) comprises a mold body main body (12) and a bottom plate (13); the bottom surface of the mold body main body (12) is detachably connected to the bottom plate (13); the mold cavity (2) is provided on the upper surface of the mold body main body (12); the rotating hole (21) is connected to the bottom surface of the mold body main body (12); a mounting groove is provided on the upper surface of the bottom plate (13); the swing rod (61) and the push rod (62) are both located in the mounting groove; the mounting groove and the mold body main body (12) are assembled to form the mounting cavity (11).

9. A mold structure capable of automatically adjusting the spacing between insert pins according to claim 8, characterized in that: The mounting groove comprises a swing groove (14) and a slide groove (15), the swing groove (14) corresponds to the swing rod (61), the push rod (62) can be slidably mounted in the slide groove (15), and the slide groove (15) is connected to the swing groove (14).

10. A mold structure capable of automatically adjusting the spacing between insert pins according to claim 9, characterized in that: The side wall surface of the swing groove (14) away from the push rod (62) is a contact surface (16), and the contact surface (16) contacts the swing rod (61) when the insert needle (4) is in a standard position.

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