Die guide wire positioning forming auxiliary mechanism

Abstract

The utility model discloses a die guide wire positioning forming auxiliary mechanism, including upper die and lower die, the upper die top middle part is equipped with injection port, and the upper die is equipped with upper core and lower core between lower die, and the upper core is surrounded with lower core and forms the forming cavity of target tubular workpiece, and the one side surface of lower die is fixedly connected with the support, and the one end of support is away from lower die and is fixedly installed with the transfer cylinder and penetrates, and the output end of transfer cylinder is connected with the one end of guide wire, and the other side of lower die is away from support and is fixedly installed with the tension cylinder, and the one end of guide wire is away from transfer cylinder and is movably arranged in target tubular workpiece and is detachably connected with the output end of tension cylinder, in this mechanism, the transfer cylinder can drive guide wire and stably convey to the forming cavity, and after forming, still can assist to draw out guide wire to guarantee the hollow structure of workpiece, and after the guide wire is fixed by the tension cylinder, the guide wire is tensioned through small amplitude movement, avoids the deviation of guide wire when injection molding, realizes guide wire accurate positioning and convenient dismounting as a whole, and effectively guarantees target tubular workpiece forming quality.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold guide wire positioning and forming auxiliary mechanism. Background Technology

[0002] In the field of tubular workpiece injection molding, there is a widespread demand for workpieces with hollow structures and tapered holes at the ends. However, existing technologies have key pain points: First, the hollow structure of the workpiece relies on guide wires for molding. However, traditional guide wires lack stable positioning and tensioning mechanisms, making them susceptible to movement or displacement due to the impact pressure of raw materials during injection molding. This can lead to uneven wall thickness in the hollow part, or even local blockage, making it impossible to guarantee the accuracy of the workpiece's bore diameter. Second, the tapered guide holes at both ends of the workpiece often need to be achieved through secondary processing such as milling and drilling after injection molding. This not only increases process costs and production cycle but also easily causes coaxiality deviation between the tapered holes and the hollow structure due to secondary clamping and positioning errors, affecting the sealing and stability of subsequent assembly. In addition, the guide wire extraction operation in traditional structures is inconvenient, often requiring manual assistance or easily scraping the inner wall of the molded workpiece, further affecting production efficiency and product quality.

[0003] Therefore, those skilled in the art have provided a mold guide wire positioning and forming auxiliary mechanism to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a mold guide wire positioning and forming auxiliary mechanism.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A mold guide wire positioning and forming auxiliary mechanism includes an upper mold and a lower mold. The upper mold has an injection port at the top center. The upper mold and the lower mold are fitted with a matching upper core and a lower core, which together form a forming cavity for the target tubular workpiece.

[0007] A bracket is fixedly connected to one side of the lower mold, and a transfer cylinder is fixedly installed through and at the end of the bracket away from the lower mold. The output end of the transfer cylinder is connected to one end of the guide wire.

[0008] A tensioning cylinder is fixedly installed on the side of the lower mold away from the support. The end of the guide wire away from the transfer cylinder moves through the central axis of the target tubular workpiece and is detachably connected to the output end of the tensioning cylinder after passing through.

[0009] Preferably, a slide rail is fixedly installed at the top of the bracket, and a slider is slidably connected to the inner side of the slide rail;

[0010] One end of the slider is fixedly connected to the output shaft of the transfer cylinder, and the other end is detachably connected to a positioning block. The end of the guide wire away from the tensioning cylinder is fixedly installed on the positioning block.

[0011] Preferably, a movable block is slidably connected to the side of the lower die top away from the slider, and a guide block is detachably connected to the end of the movable block near the guide wire;

[0012] The positioning block and the guide block are respectively fixedly installed at one end of a tapered hole forming pin and a double tapered hole forming pin. The adjacent ends of the tapered hole forming pin and the double tapered hole forming pin are both tapered structures and are coaxially inserted at both ends of the target tubular workpiece.

[0013] Both the one-end tapered forming pin and the two-end tapered forming pin have through holes along their axes for the guide wire to pass through.

[0014] Preferably, both the one-end tapered hole forming pin and the two-end tapered hole forming pin have a large head integrally formed at their far ends;

[0015] The positioning block and guide block are respectively provided with assembly holes for the one-end tapered hole forming pin and the two-end tapered hole forming pin to move through. The ends of the two assembly holes that are far apart are both enlarged to form countersunk grooves, which are adapted to the large head of the corresponding forming pin.

[0016] Preferably, the large end of the one-end tapered hole forming pin is provided with a cylindrical groove, and the end of the guide wire located on one side of the one-end tapered hole forming pin is integrally fixed with a positioning post, which is coaxially embedded in the inner side of the cylindrical groove.

[0017] Preferably, a locking pin is fixedly connected to the output end of the tensioning cylinder, and a locking hole is provided through the outer wall of the locking pin. A clamping screw is symmetrically threaded to both ends of the locking hole.

[0018] The locking pin has a through hole along its axis in the middle for the guide wire to pass through. After the guide wire is passed through, it is clamped between two clamping screws.

[0019] Preferably, the bottom end of the upper mold is fixedly equipped with an inclined guide post, the top end of the lower mold is fixedly equipped with a guide rail for the guide block to slide horizontally, and the top end of the guide block is provided with an inclined insertion hole adapted to the inclined guide post.

[0020] The bottom end of the upper mold is fixed to a clamping block near the inclined guide post by a screw. The side of the clamping block near the inclined guide post and the side of the guide block near the tensioning cylinder are adapted to each other with an inclined structure.

[0021] Compared with the prior art, the beneficial effects of this utility model are:

[0022] This utility model designs a mold guide wire positioning and forming auxiliary mechanism. Through a transfer cylinder driving stable guide wire transport and a tensioning cylinder providing slight tension in conjunction with the positioning structure, it effectively prevents the guide wire from shifting or deviating due to injection pressure, ensuring uniform wall thickness and diameter accuracy in the hollow part of the workpiece. Simultaneously, with the aid of a one-end tapered hole forming pin and two-end tapered hole forming pins, the tapered guide holes at both ends of the workpiece can be formed simultaneously during injection molding, eliminating the need for traditional secondary processing steps. This reduces production costs, shortens the cycle time, and avoids secondary clamping and positioning errors, ensuring coaxiality between the tapered holes and the hollow structure to improve assembly sealing. Furthermore, the detachable connection between the positioning block and the slider, and between the guide block and the movable block, combined with the interlocking design of the positioning post and the cylindrical groove, makes guide wire assembly, disassembly, and extraction more convenient, reducing the risk of scraping the inner wall of the workpiece, and significantly improving overall product molding quality and production efficiency. Attached Figure Description

[0023] To illustrate the technical solutions in the embodiments of the present invention or the prior art more specifically and intuitively, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0024] Figure 1 This is a schematic diagram of the mold guide wire positioning and forming auxiliary mechanism proposed in this utility model;

[0025] Figure 2 This is a schematic diagram of the upper and lower core installation structure proposed in this utility model;

[0026] Figure 3 This is a schematic diagram of the tensioning cylinder mounting structure proposed in this utility model;

[0027] Figure 4 This is a schematic diagram of the slider mounting structure proposed in this utility model;

[0028] Figure 5 This is a schematic diagram of the target tubular workpiece structure proposed in this utility model;

[0029] Figure 6 This is a schematic diagram of the guide block installation structure proposed in this utility model;

[0030] Figure 7 This is a schematic diagram of the guide wire installation structure proposed in this utility model;

[0031] Figure 8 This is a schematic diagram of the cross-sectional structure of the locking column proposed in this utility model;

[0032] Figure 9 This is a schematic diagram of the installation structure of the two-end tapered hole forming pin proposed in this utility model.

[0033] In the diagram: 1. Upper mold; 2. Lower mold; 3. Injection port; 4. Upper core; 5. Lower core; 6. Target tubular workpiece; 7. Support; 8. Transfer cylinder; 9. Guide wire; 10. Tensioning cylinder; 11. Slide rail; 12. Slider; 13. Positioning block; 14. Movable block; 15. Guide block; 16. One-end tapered hole forming pin; 17. Two-end tapered hole forming pin; 18. Positioning post; 19. Locking post; 20. Clamping screw; 21. Angled guide post; 22. Guide rail; 23. Angled insertion hole; 24. Clamping block. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0035] Reference Figure 1-9 A mold guide wire positioning and forming auxiliary mechanism includes an upper mold 1 and a lower mold 2. An injection port 3 is provided at the middle of the top of the upper mold 1. An upper core 4 and a lower core 5 are fitted between the upper mold 1 and the lower mold 2. The upper core 4 and the lower core 5 surround and form a forming cavity for the target tubular workpiece 6.

[0036] A bracket 7 is fixedly connected to one side of the lower mold 2. A transfer cylinder 8 is installed through and fixedly mounted on the end of the bracket 7 away from the lower mold 2. The output end of the transfer cylinder 8 is connected to one end of the guide wire 9.

[0037] A tensioning cylinder 10 is fixedly installed on the side of the lower mold 2 away from the bracket 7. The end of the guide wire 9 away from the transfer cylinder 8 is movably inserted through the central axis of the target tubular workpiece 6, and after insertion, it is detachably connected to the output end of the tensioning cylinder 10.

[0038] Using the above technical solution, the molding cavity formed by the upper core 4 and the lower core 5 provides a stable injection molding space for the target tubular workpiece 6, and the injection port 3 can accurately input the injection raw material; the transfer cylinder 8 can drive the guide wire 9 to be stably transported to the inside of the molding cavity along the central axis of the target tubular workpiece 6. After injection molding, it can be reversed to pull the guide wire 9 out of the molded workpiece, ensuring the hollow structure of the workpiece is formed; after the tension cylinder 10 is detachably connected and fixed to one end of the guide wire 9, it can tighten and maintain the tension of the guide wire 9 through a small-amplitude telescopic movement, avoiding the guide wire 9 from deviating during injection molding and causing deformation of the hollow structure. With the fixing effect of the bracket 7 on the transfer cylinder 8, the overall system realizes the accurate installation, tensioning and positioning and convenient disassembly of the guide wire 9, ensuring the molding quality of the target tubular workpiece 6.

[0039] A slide rail 11 is fixedly installed at the top of the bracket 7, and a slider 12 is slidably connected to the inner side of the slide rail 11.

[0040] One end of the slider 12 is fixedly connected to the output shaft of the transfer cylinder 8, and the other end is detachably connected to the positioning block 13. The end of the guide wire 9 away from the tensioning cylinder 10 is fixedly installed on the positioning block 13.

[0041] Using the above technical solution, the slide rail 11 at the top of the bracket 7 and the slider 12 form a sliding fit structure, which can provide precise guidance for the guide wire 9 driven by the transfer cylinder 8, and avoid lateral deviation of the guide wire 9 during the transfer process; the positioning block 13, on the one hand, realizes the fixed installation of the end of the guide wire 9 away from the tension cylinder 10, and on the other hand, through the detachable connection with the slider 12, it is convenient to replace and adjust according to different specifications of guide wire 9 or target tubular workpiece 6. Combined with the fixed connection relationship between the transfer cylinder 8 and the slider 12, the transfer movement of the guide wire 9 is more stable and the positioning is more accurate, further ensuring the overlap of the central axis of the guide wire 9 and the target tubular workpiece 6.

[0042] A movable block 14 is slidably connected to the top of the lower mold 2 on the side away from the slider 12, and a guide block 15 is detachably connected to the end of the movable block 14 near the guide wire 9.

[0043] The positioning block 13 and the guide block 15 are respectively fixedly installed at their adjacent ends. The one-end tapered hole forming pin 16 and the two-end tapered hole forming pin 17 are both tapered structures and are coaxially inserted at both ends of the target tubular workpiece 6.

[0044] Both the one-end tapered forming pin 16 and the two-end tapered forming pin 17 have through holes along their axes for the guide wire 9 to pass through.

[0045] Using the above technical solution, the positioning block 13 and the guide block 15 respectively fix one-end tapered hole forming pin 16 and two-end tapered hole forming pin 17. Through the tapered structure coaxially inserted at both ends of the target tubular workpiece 6, the tapered guide holes at both ends of the workpiece can be directly formed during the injection molding process. Moreover, the tapered structure of the two forming pins can be set to different specifications according to the workpiece requirements. The through hole in the middle provides a stable passage for the guide wire 9, ensuring that the guide wire 9 always passes along the central axis. At the same time, it keeps the tapered guide hole coaxial with the hollow structure inside the workpiece, which greatly improves the forming accuracy of the end hole of the target tubular workpiece 6 and the consistency of the overall structure.

[0046] Both the tapered hole forming pin 16 and the tapered hole forming pin 17 at opposite ends have a large head integrally formed.

[0047] The positioning block 13 and the guide block 15 are respectively provided with assembly holes for the one-end tapered hole forming pin 16 and the two-end tapered hole forming pin 17 to be movably inserted. The ends of the two assembly holes that are far apart are both enlarged to form countersunk grooves, which are adapted to the large head of the corresponding forming pin.

[0048] Using the above technical solution, the large heads of the one-end tapered forming pin 16 and the two-end tapered forming pin 17 are precisely matched with the countersunk grooves at the ends of the mounting holes of the positioning block 13 and the guide block 15. This effectively restricts the movement of the two forming pins along the axial direction under the action of injection pressure, and avoids the displacement of the forming pins causing deviations in the size or position of the tapered guide hole. At the same time, the mounting hole provides stable installation support for the forming pins, ensuring that the forming pins remain coaxial during operation, further ensuring the coaxiality of the tapered holes at both ends of the target tubular workpiece 6 with the hollow structure, and improving the stability of the overall forming quality.

[0049] The slider 12 and the movable block 14 are respectively provided with slots that fit the contours of the positioning block 13 and the guide block 15. The positioning block 13 and the slider 12, and the guide block 15 and the movable block 14 can be initially positioned by fitting and fastening, or they can be further fixed by screw connection. Both connection methods take into account the convenience of installation and the stability of connection. At the same time, the ends of the positioning block 13 and the guide block 15 that are far apart abut against the inner wall of the corresponding slot, which can limit the lateral displacement of the positioning block 13 and the guide block 15 on the slider 12 and the movable block 14, and ensure that the one-end tapered hole forming pin 16 and the two-end tapered hole forming pin 17 are always coaxial with the forming cavity of the target tubular workpiece 6, further improving the tapered hole forming accuracy and the overall working stability of the mechanism.

[0050] A cylindrical groove is provided at the large end of the tapered hole forming pin 16. A positioning post 18 is integrally fixed to the end of the guide wire 9 located on one side of the tapered hole forming pin 16. The positioning post 18 is coaxially embedded in the inner side of the cylindrical groove.

[0051] Using the above technical solution, the outer diameter of the positioning post 18 is larger than that of the guide wire 9, which can stably be stuck in the cylindrical groove to form an axial limit, avoiding the guide wire 9 from moving during injection molding and causing uneven wall thickness in the hollow target tubular workpiece 6; the coaxial engagement of the two can quickly align the guide wire 9 with the through hole of the one-end tapered hole forming pin 16, ensuring the coaxiality of the hollow structure of the workpiece and the end tapered hole; and since the positioning block 13 and the slider 12 are detachably connected, during disassembly, only the positioning block 13 needs to be removed to drive the positioning post 18 out of the cylindrical groove, thereby quickly separating the one-end tapered hole forming pin 16 from the guide wire 9, simplifying the disassembly and assembly operation.

[0052] A locking pin 19 is fixedly connected to the output end of the tensioning cylinder 10. A locking hole is opened through the outer wall of the locking pin 19. A clamping screw 20 is symmetrically threaded at both ends of the locking hole.

[0053] The locking post 19 has a through hole along its axis in the middle for the guide wire 9 to pass through. After the guide wire 9 is passed through, it is clamped between the two clamping screws 20.

[0054] Using the above technical solution, the through hole in the middle of the locking post 19 provides an insertion channel for the guide wire 9. With the help of the clamping screws 20 with symmetrical threaded connections at both ends, the guide wire 9 can be firmly clamped inside the locking post 19 by tightening, realizing the detachable fixation of the guide wire 9 and the output end of the tensioning cylinder 10. This structure not only ensures that the guide wire 9 does not slip during the tensioning process, but also adapts to guide wires 9 of different diameters, improving the versatility of the mechanism. At the same time, with the small-amplitude extension and retraction movement of the tensioning cylinder 10, the tension of the guide wire 9 can be precisely controlled, avoiding the guide wire 9 from shaking due to insufficient tension or deformation due to excessive tension, thus ensuring the forming accuracy of the hollow structure of the target tubular workpiece 6.

[0055] An inclined guide post 21 is fixedly installed at the bottom of the upper mold 1, and a guide rail 22 for the guide block 15 to slide horizontally is fixedly installed at the top of the lower mold 2. An inclined insertion hole 23 adapted to the inclined guide post 21 is opened at the top of the guide block 15.

[0056] A clamping block 24 is fixed to the bottom of the upper mold 1 near the inclined guide post 21 by a screw. The side of the clamping block 24 near the inclined guide post 21 and the side of the guide block 15 near the tensioning cylinder 10 have a matching inclined structure.

[0057] Using the above technical solution, during the mold closing process, the upper mold 1 drives the inclined guide post 21 to move downwards synchronously. After the inclined guide post 21 is inserted into the inclined insertion hole 23 of the guide block 15, the driving force of the inclined surface cooperation drives the guide block 15 to slide horizontally along the guide rail 22 of the lower mold 2, so that the two-end tapered hole forming pin 17 is precisely close to the forming cavity of the target tubular workpiece 6, ensuring that the two-end tapered hole forming pin 17 is coaxially aligned with the forming cavity. When the mold is closed, the inclined surface of the clamping block 24 and the inclined surface of the guide block 15 fit tightly together to form a positioning and locking structure, which prevents the guide block 15 from shifting due to injection pressure during the injection process, thereby preventing the two-end tapered hole forming pin 17 from shifting and causing a decrease in the forming accuracy of the tapered hole. The entire structure integrates the mold closing action with the driving and positioning of the guide block 15, without the need for additional driving components, which not only improves the automation level of the mechanism, but also ensures the processing accuracy and stability of the tapered hole at the end of the forming cavity.

[0058] Working principle:

[0059] After the mold is closed and started, the upper mold 1 drives the inclined guide post 21 to move downward. The inclined guide post 21 is inserted into the inclined insertion hole 23 of the guide block 15, driving the guide block 15 to slide along the guide rail 22, so that the two-end tapered hole forming pin 17 approaches the forming cavity of the target tubular workpiece 6. At the same time, the transfer cylinder 8 drives the slider 12 to slide along the slide rail 11, driving the positioning block 13 and the one-end tapered hole forming pin 16 to approach the forming cavity simultaneously. After the two forming pins are coaxially inserted, the guide wire 9 passes through the through hole of the two forming pins and the forming cavity. The tensioning cylinder 10 fixes one end of the guide wire 9 through the clamping screw 20 and tightens it slightly. Then, the raw material is injected from the injection port 3. After molding, the clamping screw 20 is released, the positioning block 13 is removed so that the positioning post 18 of the guide wire 9 is disengaged from the cylindrical groove of the one-end tapered hole forming pin 16, the transfer cylinder 8 pulls out the guide wire 9 in the opposite direction, and the workpiece can be taken out after the mold is opened.

[0060] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A mold guide wire positioning and forming auxiliary mechanism, comprising an upper mold (1) and a lower mold (2), characterized in that, The upper mold (1) has an injection port (3) at the top center. The upper mold (1) and the lower mold (2) are fitted with matching upper core (4) and lower core (5). The upper core (4) and lower core (5) surround and form the molding cavity of the target tubular workpiece (6). A bracket (7) is fixedly connected to one side of the lower mold (2). A transfer cylinder (8) is installed through and fixedly mounted on the end of the bracket (7) away from the lower mold (2). The output end of the transfer cylinder (8) is connected to one end of the guide wire (9). A tensioning cylinder (10) is fixedly installed on the other side of the lower mold (2) away from the bracket (7). The end of the guide wire (9) away from the transfer cylinder (8) is movably inserted through the central axis of the target tubular workpiece (6), and after insertion, it is detachably connected to the output end of the tensioning cylinder (10).

2. The mold guide wire positioning and forming auxiliary mechanism according to claim 1, characterized in that, The top of the bracket (7) is fixedly installed with a slide rail (11), and a slider (12) is slidably connected to the inner side of the slide rail (11); One end of the slider (12) is fixedly connected to the output shaft of the transfer cylinder (8), and the other end is detachably connected to the positioning block (13). The end of the guide wire (9) away from the tensioning cylinder (10) is fixedly installed on the positioning block (13).

3. The mold guide wire positioning and forming auxiliary mechanism according to claim 2, characterized in that, The lower mold (2) has a movable block (14) slidably connected to the side away from the slider (12) at the top. The movable block (14) is detachably connected to a guide block (15) at the end near the guide wire (9). The positioning block (13) and the guide block (15) are respectively fixedly installed with a one-end tapered hole forming pin (16) and a two-end tapered hole forming pin (17) at their adjacent ends. The adjacent ends of the one-end tapered hole forming pin (16) and the two-end tapered hole forming pin (17) are both tapered structures and are coaxially inserted at both ends of the target tubular workpiece (6). Both the one-end tapered forming pin (16) and the two-end tapered forming pin (17) have through holes along their axes for the guide wire (9) to pass through.

4. The mold guide wire positioning and forming auxiliary mechanism according to claim 3, characterized in that, Both the one-end tapered hole forming pin (16) and the two-end tapered hole forming pin (17) have a large head integrally formed at their far ends; The positioning block (13) and the guide block (15) are respectively provided with assembly holes for the one-end tapered hole forming pin (16) and the two-end tapered hole forming pin (17) to pass through. The ends of the two assembly holes that are far apart are enlarged to form countersunk grooves, which are adapted to the large head of the corresponding forming pin.

5. The mold guide wire positioning and forming auxiliary mechanism according to claim 4, characterized in that, The large end of the one-end tapered hole forming pin (16) is provided with a cylindrical groove. The end of the guide wire (9) located on one side of the one-end tapered hole forming pin (16) is integrally fixed with a positioning post (18), and the positioning post (18) is coaxially embedded in the inner side of the cylindrical groove.

6. The mold guide wire positioning and forming auxiliary mechanism according to claim 1, characterized in that, The output end of the tensioning cylinder (10) is fixedly connected to a locking pin (19), and a locking hole is provided through the outer wall of the locking pin (19). Both ends of the locking hole are symmetrically threaded with abutting screws (20). The locking pin (19) has a through hole in the middle along its axial direction for the guide wire (9) to pass through. After the guide wire (9) is passed through, it is clamped between two clamping screws (20).

7. The mold guide wire positioning and forming auxiliary mechanism according to claim 1, characterized in that, The upper mold (1) is fixedly installed with an inclined guide post (21) at the bottom end, and the lower mold (2) is fixedly installed with a guide rail (22) for the guide block (15) to slide horizontally. The guide block (15) has an inclined insertion hole (23) at the top end that is compatible with the inclined guide post (21). The bottom end of the upper mold (1) is fixed to the inclined guide post (21) by a screw and a clamping block (24). The side of the clamping block (24) near the inclined guide post (21) and the side of the guide block (15) near the tensioning cylinder (10) are adapted to each other with an inclined structure.

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