Valve needle adjusting tool

Abstract

The utility model discloses a valve needle adjusting tool which is used for adjusting a valve needle of an injection mold, the valve needle is screwed in a threaded through hole of a driving part piston, a fixed mold fixing plate is provided with an adjusting hole and a first screw hole, and the adjusting hole corresponds to the threaded through hole. The valve needle adjusting tool comprises a limiting cylinder, a fixing base, a locking screw and an adjusting piece, an anti-rotation structure is arranged at one end of the limiting cylinder, external threads are arranged outside the limiting cylinder, and the limiting cylinder is used for being inserted into an adjusting hole so as to be in anti-rotation limiting with a piston through the anti-rotation structure; the fixed seat is provided with a second screw hole and a limiting via hole which extend in the same direction, the fixed seat is screwed outside the limiting cylinder through the second screw hole, and the limiting via hole corresponds to the first screw hole; the locking screw penetrates through the limiting via hole and is used for being in threaded connection with the first screw hole so as to limit the piston to rotate relative to the fixed mold fixing plate; the adjusting piece is movably installed in the limiting cylinder and used for being matched with the valve needle so as to drive the valve needle to rotate relative to the piston. According to the technical scheme, the valve needle can be adjusted conveniently.

Description

Technical Field

[0001] The utility model relates to the field of injection mold auxiliary tools, in particular to a valve needle regulating tool. Background Art

[0002] Hot runner is a collection of heating components used in injection molds to inject melted plastic into the cavity of the mold. Hot runner systems are divided into open hot runner systems and needle valve hot runner systems. In needle valve hot runner systems, the valve needle is often driven by a cylinder to move, so that the valve needle fits or separates from the gate parting surface, thereby controlling the opening and closing of the gate.

[0003] At present, in some needle valve hot runner systems, in order to facilitate the adjustment of the matching between the valve needle and the gate, the valve needle is set to an adjustable form. For example, the patent with the authorization announcement number CN203594859U discloses a valve needle adjustable oil cylinder, which discloses a tool formed by sequentially sleeved adjustment rods, adjustment sleeves, fixed sleeves and fixed blocks. When used, the fixed block is fixed to the mold, and the upward movement of the fixed sleeve is limited by the retaining spring, so that the screw of the valve needle can be rotated by the adjusting rod, and the stop screw of the valve needle can be rotated by the adjusting sleeve to achieve the adjustment of the valve needle position. However, when using this structure, it is necessary to disassemble and assemble the retaining spring to make the installation position of the fixed block adapt to molds of different sizes, which is more troublesome to use. Utility Model Content

[0004] The main purpose of the utility model is to provide a valve needle adjustment tool, aiming at facilitating the adjustment of the valve needle.

[0005] To achieve the above purpose, the valve needle adjustment tool proposed by the utility model is used to adjust the valve needle of the injection mold, the valve needle is screwed into the threaded through hole of the driving member piston, the fixed mold fixing plate of the injection mold is provided with an adjustment hole and a first screw hole, and the adjustment hole is arranged corresponding to the threaded through hole. The valve needle adjustment tool includes:

[0006] A limiting cylinder, one end of which is provided with an anti-rotation structure, the outer surface of which is provided with an external thread, and the limiting cylinder is used to be inserted into the adjusting hole to prevent rotation of the piston through the anti-rotation structure;

[0007] A fixing seat, provided with a second screw hole and a limiting through hole extending in the same direction, the fixing seat is screwed to the outside of the limiting cylinder through the second screw hole, and the limiting through hole is used to correspond to the first screw hole;

[0008] a locking screw, which is passed through the limiting through hole and is used to be screwed into the first screw hole to limit the piston from rotating relative to the fixed mold fixing plate; and

[0009] An adjusting member is movably mounted in the limiting cylinder, and the adjusting member is used to cooperate with the valve needle to drive the valve needle to rotate relative to the piston.

[0010] Optionally, the fixing seat is provided with a plurality of the limiting through holes, the plurality of the limiting through holes are spaced apart along the circumference of the second screw hole, and each of the limiting through holes is provided with a locking screw.

[0011] Optionally, the number of the limiting through holes is two, and the two limiting through holes are arranged on two opposite sides of the second screw hole.

[0012] Optionally, the fixing seat is in the shape of a circular plate, and the second screw hole is located in the central area of ​​the fixing seat.

[0013] Optionally, the valve needle includes a valve needle body, an adjustment seat and an anti-loosening cylinder, one end of the valve needle body is fixed to the adjustment seat, the adjustment seat is screwed into the threaded through hole, the anti-loosening cylinder is screwed into the threaded through hole and abuts against the side of the adjustment seat away from the valve needle body, and the anti-loosening cylinder is provided with a clearance hole. The adjustment member includes an adjustment cylinder and an adjustment rod, the adjustment rod is movably arranged in the adjustment cylinder, the adjustment cylinder is movably arranged in the limit cylinder, the adjustment cylinder is used to cooperate with the anti-loosening cylinder to drive the anti-loosening cylinder to rotate relative to the piston, and the adjustment rod is used to cooperate with the adjustment seat to drive the adjustment seat to rotate relative to the piston.

[0014] Optionally, the adjusting cylinder has an operating portion extending out of the limiting cylinder, and the operating portion is provided with a wrench position.

[0015] Optionally, a handle is provided at the end of the adjusting rod.

[0016] Optionally, the adjustment seat and the anti-loosening cylinder are both provided with a hexagonal hole, the inner hole diameter of the anti-loosening cylinder is larger than the circumscribed circle diameter of the hexagonal hole on the adjustment seat, and is characterized in that the end of the adjustment cylinder is in the shape of a hexagonal prism, and the end of the adjustment rod is in the shape of a hexagonal prism.

[0017] Optionally, the anti-rotation structure includes a plurality of latching protrusions convexly provided on the end surface of the limiting cylinder, and the plurality of latching protrusions are used to be plugged and matched with a plurality of latching grooves on the piston one by one.

[0018] The technical solution of the utility model provides a valve needle adjustment tool mainly composed of a limit cylinder, a fixing seat, a locking screw and an adjusting member, wherein an anti-rotation structure is provided at one end of the limit cylinder, an external thread is provided on the outside of the limit cylinder, and the fixing seat is provided with a second screw hole and a limit through hole extending in the same direction, and the fixing seat is screwed to the outside of the limit cylinder through the second screw hole, and the limit through hole is used to correspond to the first screw hole. When in use, the limit cylinder can be first inserted into the adjustment hole of the fixed mold fixing plate, and the anti-rotation structure at the end of the limit cylinder is limitedly matched with the limit structure on the piston to limit the rotation of the piston relative to the limit cylinder. The fixing seat outside the limit cylinder is rotated until the fixed seat is close to the surface of the fixed mold fixing plate, and the limit through hole is aligned with the first screw hole on the fixed mold fixing plate, and then the locking screw is passed through the limit through hole and screwed into the first screw hole to lock the fixing seat on the fixed mold fixing plate. Due to the limitation of the threaded structure between the fixed seat and the limiting cylinder and the limitation of the piston (the piston is fixed during adjustment to limit the movement of the limiting cylinder along its length direction), the limiting cylinder can be limited to rotate relative to the fixed mold plate, thereby limiting the rotation of the piston. Subsequently, the adjusting member can be extended into the limiting cylinder and cooperate with the valve needle, thereby driving the valve needle to rotate relative to the piston to achieve valve needle position adjustment. This makes it easy to fine-tune the valve needle position on the injection mold, and is easy to use. In addition, the fixed seat is screwed to the outside of the limiting cylinder through the second screw hole, so that in the process of installing the fixed seat on the fixed mold plate, the position of the fixed seat can be adjusted so that the fixed seat is as close to the fixed mold plate as possible, which is convenient for installing the locking screws and improving the installation stability of the fixed seat. Compared with the situation where the fixed seat is limited to rotate relative to the limiting cylinder by a gasket and a retaining spring, this can reduce the number of parts, simplify the structure of the valve needle adjustment tool, and facilitate operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 This is a structural schematic diagram of an embodiment of the valve needle adjustment tool of the utility model;

[0021] Figure 2 for Figure 1 Exploded view of the middle fixing seat, limiting cylinder and adjusting piece;

[0022] Figure 3 for Figure 1 Schematic diagram of the structure when the middle valve needle adjustment tool is installed on the injection mold;

[0023] Figure 4 for Figure 3 A cross-sectional view of a valve needle adjustment tool and a valve needle adjustment tool;

[0024] Figure 5 for Figure 1 Enlarged view of point A in the middle.

[0025] Description of Figure Numbers:

[0026] 10. Valve needle adjustment tool; 11. Fixed seat; 111. Second screw hole; 112. Limiting through hole; 12. Limiting cylinder; 121. Boss; 13. Locking screw; 14. Adjusting member; 141. Adjusting cylinder; 1411. Operating part; 1412. Wrench position; 142. Adjusting rod; 1421. Handle; 21. Fixed mold fixing plate; 211. Adjusting hole; 212. First screw hole; 22. Driving member; 221. Piston; 222. Threaded through hole; 23. Valve needle; 231. Valve needle body; 232. Adjusting seat; 233. Anti-loosening cylinder.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back...), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the utility model.

[0031] Please refer to Figures 1 to 5 The utility model provides a valve needle adjustment tool 10 for adjusting a valve needle 23 of an injection mold. Specifically, the injection mold includes a mold frame, a driving member 22 and a valve needle 23. The mold frame includes a fixed mold fixing plate 21. The piston 221 of the driving member 22 is provided with a threaded through hole 222. The valve needle 23 is screwed into the threaded through hole 222 (that is, the driving member 22 is located at one end of the valve needle 23). The driving member 22 is installed on the mold frame and is located on the side of the fixed mold fixing plate 21 facing the cavity. The fixed mold fixing plate 21 is provided with an adjustment hole 222. 11 and the first screw hole 212, the adjustment hole 211 is arranged corresponding to the threaded through hole 222 and penetrates the surface of the fixed mold fixing plate 21 away from the driving member 22, the diameter of the adjustment hole 211 is larger than the diameter of the threaded through hole 222, so that the portion of the piston 221 where the threaded through hole 222 is formed is exposed through the adjustment hole 211, the portion of the piston 221 where the threaded through hole 222 is formed is provided with a limiting structure, the first screw hole 212 is arranged on the surface of the fixed mold fixing plate 21 away from the driving member 22, and is spaced from the adjustment hole 211. Optionally, the driving member 22 is a cylinder or a hydraulic cylinder.

[0032] In the embodiment of the utility model, the valve needle adjustment tool 10 includes a limit tube 12, a fixed seat 11, a locking screw 13 and an adjustment member 14. One end of the limit tube 12 is provided with an anti-rotation structure, and the limit tube 12 is provided with an external thread. The limit tube 12 is used to insert into the adjustment hole 211, and is anti-rotated and limited with the piston 221 through the anti-rotation structure. The fixed seat 11 is provided with a second screw hole 111 and a limit through hole 112 extending in the same direction. The outer peripheral surface of the limit tube 12 is provided with an external thread (not shown) that matches the internal thread in the second screw hole. The fixed seat 11 is screwed to the outside of the limit tube 12 through the second screw hole 111, and the limit through hole 112 is used to correspond to the first screw hole 212. The locking screw 13 is passed through the limit through hole 112, and the locking screw 13 is used to be screwed to the first screw hole 212 to limit the rotation of the piston 221 relative to the fixed mold fixing plate 21. The adjusting member 14 can be movably installed in the limiting cylinder 12 , and the adjusting member 14 is used to cooperate with the valve needle 23 to drive the valve needle 23 to rotate relative to the piston 221 .

[0033] Specifically, the size of the adjusting member 14 is smaller than the inner diameter of the limiting cylinder 12, so that the adjusting member 14 can rotate in the limiting cylinder 12. When in use, the limiting cylinder 12 is first inserted into the adjusting hole 211 of the fixed mold fixing plate 21, and the anti-rotation structure at the end of the limiting cylinder 12 is limitedly matched with the limiting structure on the piston 221 to limit the rotation of the piston 221 relative to the limiting cylinder 12. The fixing seat 11 outside the limiting cylinder 12 is rotated until the fixing seat 11 is close to the surface of the fixed mold fixing plate 21, and the limiting through hole 112 is aligned with the first screw hole 212 on the fixed mold fixing plate 21, and then the locking screw 13 is passed through the limiting through hole 112 and screwed into the first screw hole 212 to lock the fixing seat 11 on the fixed mold fixing plate 21. Due to the limitation of the threaded structure between the fixing seat 11 and the limiting cylinder 12 and the limitation of the piston 221 (the piston 221 is fixed during adjustment to limit the movement of the limiting cylinder 12 along its length direction), the limiting cylinder 12 can be limited to rotate relative to the fixed mold fixing plate 21, thereby limiting the rotation of the piston 221. Subsequently, the adjusting member 14 can be extended into the limiting cylinder 12 and cooperate with the valve needle 23, thereby driving the valve needle 23 to rotate relative to the piston 221, thereby achieving the position adjustment of the valve needle 23.

[0034] This makes it easy to fine-tune the position of the valve needle 23 on the injection mold, and is easy to use. Moreover, the fixing seat 11 is screwed to the outside of the limiting cylinder 12 through the second screw hole 111, so that when the fixing seat 11 is installed on the fixed mold fixing plate 21, the position of the fixing seat 11 can be easily adjusted, so that the fixing seat 11 is as close to the fixed mold fixing plate 21 as possible, which can not only facilitate the installation of the locking screw 13, but also improve the installation stability of the fixing seat 11. Compared with the situation where the fixing seat 11 is limited to rotate relative to the limiting cylinder 12 by a gasket and a retaining spring, this can reduce the number of parts, simplify the structure of the valve needle adjustment tool 10, and facilitate operation.

[0035] In some embodiments, the fixing seat 11 is provided with a plurality of limiting through holes 112, which are spaced apart along the circumference of the second screw hole 111, and a locking screw 13 is provided at each limiting through hole 112. This can improve the installation stability of the fixing seat 11 and effectively prevent the fixing seat 11 from loosening during the adjustment of the valve needle 23.

[0036] In some embodiments, there are two limiting holes 112, which are disposed on opposite sides of the second screw hole 111. This ensures that the fixing base 11 is stably installed and the number of locking screws 13 can be reduced, making the operation simple during use.

[0037] In some embodiments, the fixing base 11 is in the shape of a circular plate, and the second screw hole 111 is located in the central area of ​​the fixing base 11. This can reduce the space occupied by the fixing base 11, facilitate observation of its position during installation, and facilitate operation.

[0038] In some injection molds, the valve needle 23 includes a valve needle body 231, an adjustment seat 232 and an anti-loosening cylinder 233. One end of the valve needle body 231 is fixed to the adjustment seat 232. The adjustment seat 232 is screwed into the threaded through hole 222. The anti-loosening cylinder 233 is screwed into the threaded through hole 222 and abuts against the side of the adjustment seat 232 away from the valve needle body 231. The anti-loosening cylinder 233 is provided with a clearance hole. In this way, the adjustment seat 232 can be restricted by the anti-loosening cylinder 233, reducing the risk of the adjustment seat 232 loosening during the use of the injection mold.

[0039] In some embodiments, the adjusting member 14 includes an adjusting cylinder 141 and an adjusting rod 142, wherein the adjusting rod 142 is movably disposed in the adjusting cylinder 141, and the adjusting cylinder 141 is movably disposed in the limiting cylinder 12, and the adjusting cylinder 141 is used to cooperate with the anti-loose cylinder 233 to drive the anti-loose cylinder 233 to rotate relative to the piston 221, and the adjusting rod 142 is used to cooperate with the adjusting seat 232 to drive the adjusting seat 232 to rotate relative to the piston 221. That is, when in use, the adjusting cylinder 141 is located in the limiting cylinder 12 and can rotate in the limiting cylinder 12, the adjusting cylinder 141 cooperates with the anti-loose cylinder 233, and the adjusting rod 142 is located in the adjusting cylinder 141 and can rotate in the adjusting cylinder 141, and the adjusting rod 142 cooperates with the adjusting seat 232. In actual operation, one of the adjusting seat 232 and the anti-loose cylinder 233 can be rotated first according to the adjustment movement direction of the valve needle 23, and then the other can be rotated, which is equivalent to simultaneous operation to adjust the adjusting seat 232 and the anti-loose cylinder 233. This can avoid the situation of frequent disassembly of the adjusting member 14, and is more convenient to use.

[0040] In some embodiments, the adjusting cylinder 141 has an operating portion 1411 extending out of the limiting cylinder 12, and the operating portion 1411 is provided with a wrench position 1412. Specifically, the wrench position 1412 has at least two opposite planes, and the two planes are provided on opposite sides of the adjusting cylinder 141 for the wrench to screw, so that the structure of the adjusting cylinder 141 can be simplified. Of course, in other embodiments, a handle 1421 structure can also be provided outside the adjusting cylinder 141.

[0041] In some embodiments, a handle 1421 is provided at the end of the adjusting rod 142. Thus, the adjusting rod 142 can be rotated directly by holding the handle 1421 during use, which is convenient for operation.

[0042] Generally speaking, both the adjustment seat 232 and the anti-loosening cylinder 233 are provided with an inner hexagonal hole, and the inner hole diameter of the anti-loosening cylinder 233 is larger than the circumscribed circle diameter of the inner hexagonal hole on the adjustment seat 232, so that the inner hexagonal hole on the adjustment seat 232 is exposed through the inner hole of the anti-loosening cylinder 233. In some embodiments, the end of the adjustment cylinder 141 is in the shape of a hexagonal prism, and the end of the adjustment rod 142 is in the shape of a hexagonal prism, that is, the end of the adjustment cylinder 141 and the end of the adjustment rod 142 are both inner hexagonal wrench structures, which has a wide range of applications.

[0043] In some embodiments, the anti-rotation structure includes a plurality of protrusions 121 protruding from the end surface of the limiting cylinder 12, and the plurality of protrusions 121 are used to be plugged into and matched with a plurality of slots on the piston 221. Specifically, the slots are located at the peripheral portion of the threaded through hole 222, and the plurality of slots form a limiting structure, so that the anti-rotation structure and the piston 221 can be relatively simple in structure and easy to form.

[0044] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A valve needle adjustment tool, used for adjusting the valve needle of an injection mold, wherein the valve needle is screwed into a threaded through hole of a driving member piston, and a fixed mold fixing plate of the injection mold is provided with an adjustment hole and a first screw hole, wherein the adjustment hole is arranged corresponding to the threaded through hole, and characterized in that: The valve needle adjustment tool comprises: A limiting cylinder, one end of which is provided with an anti-rotation structure, the outer surface of which is provided with an external thread, and the limiting cylinder is used to be inserted into the adjusting hole to prevent rotation of the piston through the anti-rotation structure; A fixing seat, provided with a second screw hole and a limiting through hole extending in the same direction, the fixing seat is screwed to the outside of the limiting cylinder through the second screw hole, and the limiting through hole is used to correspond to the first screw hole; a locking screw, which is passed through the limiting through hole and is used to be screwed into the first screw hole to limit the piston from rotating relative to the fixed mold fixing plate; and An adjusting member is movably mounted in the limiting cylinder, and the adjusting member is used to cooperate with the valve needle to drive the valve needle to rotate relative to the piston.

2. The valve needle adjustment tool according to claim 1, characterized in that: The fixing seat is provided with a plurality of the limiting through holes, and the plurality of the limiting through holes are distributed at intervals along the circumference of the second screw hole, and each of the limiting through holes is provided with a locking screw.

3. The valve needle adjustment tool according to claim 2, characterized in that: The number of the limiting through holes is two, and the two limiting through holes are arranged on two opposite sides of the second screw hole.

4. The valve needle adjustment tool according to claim 3, characterized in that: The fixing seat is in the shape of a circular plate, and the second screw hole is located in the central area of ​​the fixing seat.

5. The valve needle adjustment tool according to claim 1, characterized in that: The valve needle includes a valve needle body, an adjusting seat and an anti-loosening cylinder, one end of the valve needle body is fixed to the adjusting seat, the adjusting seat is threaded in the threaded through hole, the anti-loosening cylinder is threaded in the threaded through hole, and abuts against the side of the adjusting seat away from the valve needle body, and the anti-loosening cylinder is provided with a clearance hole; the adjusting member includes an adjusting cylinder and an adjusting rod, the adjusting rod is movably arranged in the adjusting cylinder, the adjusting cylinder is movably arranged in the limiting cylinder, the adjusting cylinder is used to cooperate with the anti-loosening cylinder to drive the anti-loosening cylinder to rotate relative to the piston, and the adjusting rod is used to cooperate with the adjusting seat to drive the adjusting seat to rotate relative to the piston.

6. The valve needle adjustment tool according to claim 5, characterized in that: The adjusting cylinder has an operating portion extending out of the limiting cylinder, and the operating portion is provided with a wrench position.

7. The valve needle adjustment tool according to claim 6, characterized in that: A handle is provided at the end of the adjusting rod.

8. The valve needle adjustment tool according to claim 5, characterized in that: The adjustment seat and the anti-loosening cylinder are both provided with a hexagonal hole, the inner hole diameter of the anti-loosening cylinder is larger than the circumscribed circle diameter of the hexagonal hole on the adjustment seat, the end of the adjustment cylinder is in the shape of a hexagonal column, and the end of the adjustment rod is in the shape of a hexagonal column.

9. The valve needle adjustment tool according to any one of claims 1 to 8, characterized in that: The anti-rotation structure includes a plurality of latching protrusions convexly arranged on the end surface of the limiting cylinder, and the plurality of latching protrusions are used to be plugged and matched with a plurality of latching grooves on the piston one by one.

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