Blowing mechanism for generating internal threads of blow molding machine

Abstract

The utility model discloses an air blowing mechanism for generating internal threads of a blow molding machine, which comprises a servo motor, a mounting seat, an air blowing pipe, a cooling block, a cooling sleeve and a cooling pipe, a guide hole corresponding to the cooling sleeve is arranged in the cooling block, the cooling pipe is concentrically arranged in the cooling sleeve, and the air blowing pipe is arranged in the cooling sleeve. A circle of first annular boss corresponding to the inner wall of the cooling sleeve is arranged at the bottom of the outer circle of the cooling pipe, an outer cooling channel located above the first annular boss is formed between the inner wall of the cooling sleeve and the outer wall of the cooling pipe, and an inner cooling channel is formed between the inner wall of the cooling pipe and the outer wall of the air blowing pipe. Third water inlet holes communicated with the outer cooling channel and the inner cooling channel are formed in the upper portion of the cooling pipe, a threaded groove is formed in the upper portion of the outer wall of the cooling sleeve, and first air inlet holes located below the air blowing pipe and communicated with the air blowing pipe are formed in the bottom of the outer wall of the cooling sleeve in the radial direction. By means of the mode, the blowing mechanism for generating the internal threads of the blow molding machine improves the cooling effect and the rotating precision, and reduces the risk of water leakage.

Description

Technical Field

[0001] This utility model relates to the field of blow molding machines, and in particular to an air blowing mechanism for generating internal threads in a blow molding machine. Background Technology

[0002] Large-capacity plastic buckets (200L~220L plastic buckets) require a larger air volume during blow molding production. In order to expand the blank, the air blowing mechanism needs to be in contact with the blank for a long time, which leads to overheating problems and requires cooling, increasing the complexity of the air blowing mechanism.

[0003] In addition, some large-capacity plastic buckets have an internally threaded opening. This internal thread structure can be formed by the air blowing mechanism working in conjunction with the mold, but it increases the difficulty of demolding. After air blowing is completed, a hydraulic motor usually drives the air blowing rod to rotate, and the air blowing rod is lowered according to the thread pitch. It is necessary to keep them synchronized, otherwise the internal thread structure of the bucket will be damaged.

[0004] Due to its structural design, the air blower's rotation and descent can easily cause accelerated wear of the sealing ring and leakage of cooling water, necessitating improvements. Utility Model Content

[0005] The main technical problem solved by this utility model is to provide an air blowing mechanism for generating internal threads in a blow molding machine, which improves the cooling effect and rotation control accuracy, and reduces water leakage.

[0006] To solve the above technical problems, the present invention provides a blowing mechanism for generating internal threads in a blow molding machine, comprising: a servo motor, a mounting base, an air blowing pipe, a cooling block, a cooling sleeve, and a cooling tube. The cooling block is mounted on the mounting base and has a guide hole corresponding to the cooling sleeve. The cooling sleeve is disposed in the guide hole and extends upward. The servo motor is mounted at the bottom of the mounting base. The bottom of the cooling sleeve has a connector connected to the rotating shaft of the servo motor. The cooling tube is concentrically disposed in the cooling sleeve, and the air blowing pipe is concentrically disposed in the cooling tube. A limiting sleeve is provided at the upper end of the cooling tube, which is fitted onto the air blowing pipe and extends above the cooling sleeve. A first annular boss corresponding to the inner wall of the cooling sleeve is provided at the bottom of the outer circumference of the cooling tube. A first annular boss is formed between the inner wall of the cooling sleeve and the outer wall of the cooling tube. An outer cooling channel is provided above an annular boss. An inner cooling channel is formed between the inner wall of the cooling pipe and the outer wall of the air blowing pipe. A first water outlet hole communicating with the inner cooling channel is radially provided on the first annular boss. A second water outlet hole communicating with the first water outlet hole is radially provided in the cooling sleeve. A third water outlet hole communicating with the second water outlet hole is provided on one side of the cooling block. A first water inlet hole communicating with the outer cooling channel is radially provided in the cooling sleeve. A second water inlet hole communicating with the first water inlet hole is provided on one side of the cooling block. A third water inlet hole communicating with the outer cooling channel and the inner cooling channel is provided on the upper part of the cooling pipe. A threaded groove is provided on the upper part of the outer wall of the cooling sleeve. A first air inlet hole communicating with the air blowing pipe is radially provided at the bottom of the outer wall of the cooling sleeve. A second air inlet hole communicating with the first air inlet hole is provided on one side of the cooling block.

[0007] In a preferred embodiment of the present invention, the limiting sleeve is provided with a fastening nut located at the top of the cooling sleeve, and the outer circle of the limiting sleeve is provided with an external thread corresponding to the fastening nut.

[0008] In a preferred embodiment of the present invention, a first annular groove corresponding to the first water outlet hole is provided recessed on the outer circle of the first annular boss, and the first water outlet hole is distributed in an annular array in the first annular groove.

[0009] In a preferred embodiment of the present invention, the second water outlet holes are arranged in an annular array on the cooling jacket, and a second annular groove corresponding to the second water outlet holes is recessed on the inner wall of the guide hole, and the third water outlet hole is connected to the second annular groove.

[0010] In a preferred embodiment of the present invention, the first water inlet holes are arranged in an annular array on the cooling jacket, and a third annular groove corresponding to the first water inlet hole is recessed on the inner wall of the guide hole, and the second water inlet hole is connected to the third annular groove.

[0011] In a preferred embodiment of the present invention, a second annular boss connected to the outer wall of the air blowing pipe is provided at the bottom of the inner hole of the cooling pipe.

[0012] In a preferred embodiment of the present invention, the top of the cooling sleeve is provided with a through hole corresponding to the limiting sleeve, a first sealing ring is provided in the through hole, and a second sealing ring is provided on both sides of the first water outlet on the first annular protrusion.

[0013] In a preferred embodiment of the present invention, a third sealing ring is provided at an interval in the guide hole, and the third sealing ring is located on both sides of the second water inlet and the third water outlet.

[0014] In a preferred embodiment of this utility model, the third sealing ring is a Glyd ring.

[0015] In a preferred embodiment of the present invention, the first air inlet holes are arranged in an annular array at the bottom of the outer wall of the cooling jacket, and a fourth annular groove corresponding to the first air inlet hole is recessed in the guide hole, and the second air inlet hole is connected to the fourth annular groove.

[0016] The beneficial effects of this utility model are as follows: The air blowing mechanism for generating internal threads in a blow molding machine, as indicated by this utility model, utilizes the threaded groove on the outer wall of the cooling jacket to cooperate with the mold of the blow molding machine to generate internal threads in the plastic bucket. The air blowing pipe, cooling jacket, and cooling pipe are rotated by a servo motor, which has a fast response and high rotational accuracy. This facilitates synchronization with the lifting system in the blow molding machine, improves the smoothness of separation between the threaded groove and the plastic bucket, avoids damage to the internal threads, and improves the overall cooling effect and reduces the risk of water leakage through the design of external and internal cooling channels. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort, wherein:

[0018] Figure 1 This is a schematic diagram of a preferred embodiment of the air blowing mechanism for generating internal threads in a blow molding machine according to the present invention.

[0019] Figure 2 yes Figure 1 Sectional view along axis AA;

[0020] Figure 3 yes Figure 1 A three-dimensional image;

[0021] Figure 4 yes Figure 2 A magnified view of part B in the middle section;

[0022] Figure 5 yes Figure 2 A magnified view of part C in the middle. Detailed Implementation

[0023] The technical solutions in the embodiments of this utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] See also Figures 1-5 The embodiments of this utility model include:

[0025] like Figures 1-3 The blow molding machine internal thread generation blow mechanism shown includes: servo motor 4, mounting base 6, blow pipe 8, cooling block 1, cooling sleeve 2 and cooling pipe 5. The cooling block 1 is set on the mounting base 6 and can be fixed with screws. The structure is stable and easy to disassemble and assemble.

[0026] A guide hole 29 corresponding to the cooling sleeve 2 is provided in the cooling block 1. The cooling sleeve 2 is placed in the guide hole 29 and extends upward. The servo motor 4 is located at the bottom of the mounting base 6. A connector 20 connected to the rotating shaft of the servo motor 4 is provided at the bottom of the cooling sleeve 2. The connector 20 is fixed to the bottom of the cooling sleeve 2 with screws, which can both seal the bottom of the cooling sleeve 2 and drive the rotation of the cooling sleeve 2 through the servo motor 4. The servo motor 4 can be controlled by a PLC, and the rotation control accuracy is high.

[0027] The cooling pipe 5 is concentrically arranged within the cooling jacket 2, and the air blowing pipe 8 is concentrically arranged within the cooling pipe 5, such as... Figure 4 As shown, a limiting sleeve 12 is provided at the upper end of the cooling pipe 5, which is sleeved on the air blowing pipe 8 and extends to the top of the cooling sleeve 2. The limiting sleeve 12 is welded and fixed to the air blowing pipe 8 and the cooling pipe 5 respectively to avoid water leakage.

[0028] like Figure 4 As shown, a fastening nut 3 is provided on the limiting sleeve 12 at the top of the cooling sleeve 2. An external thread corresponding to the fastening nut 3 is provided on the outer circumference of the limiting sleeve 12. The limiting sleeve 12 is locked by the fastening nut 3, facilitating assembly. A through hole corresponding to the limiting sleeve 12 is provided at the top of the cooling sleeve 2, and a first sealing ring 11 is provided inside the through hole to prevent water leakage.

[0029] like Figure 5As shown, a first annular protrusion 25 corresponding to the inner wall of the cooling sleeve 2 is provided at the bottom of the outer circle of the cooling pipe 5. An outer cooling channel 14 is formed between the inner wall of the cooling sleeve 2 and the outer wall of the cooling pipe 5, located above the first annular protrusion 25. An inner cooling channel 10 is formed between the inner wall of the cooling pipe 5 and the outer wall of the air blowing pipe 8, so as to perform overall cooling.

[0030] like Figure 5 As shown, a first annular boss 25 is radially provided with a first water outlet 26 communicating with the inner cooling channel 10. A second sealing ring 27 is provided on both sides of the first water outlet 26 on the first annular boss 25 to prevent water leakage. A second water outlet 17 is radially provided in the cooling sleeve 2, communicating with the first water outlet 26. In this embodiment, a first annular groove 30 corresponding to the first water outlet 26 is recessed on the outer circumference of the first annular boss 25. The first water outlets 26 are arranged in a ring array within the first annular groove 30, enabling communication between the second water outlet 17 and the first water outlet 26 through the first annular groove 30, ensuring efficient water flow.

[0031] A third water outlet 22, communicating with the second water outlet 17, is provided on one side of the cooling block 1. The third water outlet 22 can be connected to the return water pipe of the cooling water circulation system for the recycling of cooling water. In this embodiment, the second water outlets 17 are arranged in a ring array on the cooling sleeve 2. A second annular groove 18 corresponding to the second water outlet 17 is recessed on the inner wall of the guide hole 29. The third water outlet 22 is connected to the second annular groove 18, eliminating the need to consider the misalignment problem between the third water outlet 22 and the second water outlet 17, thus facilitating assembly.

[0032] like Figure 5 As shown, a first water inlet hole 15 communicating with the external cooling channel 14 is radially arranged in the cooling jacket 2, and a second water inlet hole 23 communicating with the first water inlet hole 15 is arranged on one side of the cooling block 1. A third sealing ring 24 is arranged at intervals in the guide hole 29. The third sealing ring 24 is located on both sides of the second water inlet hole 23 and the third water outlet hole 22. In this embodiment, the third sealing ring 24 is a Glyd ring, which has a good sealing effect.

[0033] The second water inlet 23 is connected to the outlet pipe of the external cooling water circulation system, guiding the cooling water into the external cooling channel 14. In this embodiment, the first water inlet 15 is arranged in a ring array on the cooling sleeve 2, and a third annular groove 16 corresponding to the first water inlet 15 is recessed on the inner wall of the guide hole 29. The second water inlet 23 is connected to the third annular groove 16 to ensure that the cooling water enters the external cooling channel 14 through the first water inlet 15.

[0034] like Figure 4As shown, the upper part of the cooling pipe 5 is provided with a third water inlet hole 13 that connects the outer cooling channel 14 and the inner cooling channel 10, so that the cooling water in the outer cooling channel 14 can enter the inner cooling channel 10, cool the outer wall of the air blowing pipe 8, and then be discharged through the third water outlet hole 22 to ensure the overall cooling effect.

[0035] A threaded groove 9 is provided on the upper part of the outer wall of the cooling jacket 2. After the blow molding machine closes the mold, the threaded groove 9 on the outer wall of the cooling jacket 2 cooperates with the mold of the blow molding machine to generate the internal thread in the plastic bucket. After the mold opens, the cooling jacket 2 needs to drive the rotation of the threaded groove 9 and simultaneously cooperate with the descent of the cooling jacket 2 to achieve the smooth separation of the threaded groove 9 from the plastic bucket and avoid damage to the internal thread in the plastic bucket.

[0036] A first air inlet 19 is radially arranged at the bottom of the outer wall of the cooling jacket 2, located below and communicating with the air blowing pipe 8. A second air inlet 7, communicating with the first air inlet 19, is arranged on one side of the cooling block 1. The second air inlet 7 is connected to an air intake pipe to deliver compressed air into the air blowing pipe 8. In this embodiment, the first air inlets 19 are arranged in a ring array at the bottom of the outer wall of the cooling jacket 2. A fourth annular groove 21 corresponding to the first air inlet 19 is recessed in the guide hole 29. The second air inlet 7 is connected to the fourth annular groove 21 to ensure that the compressed air in the second air inlet 7 can enter the air blowing pipe 8 through the first air inlet 19.

[0037] like Figure 5 As shown, a second annular boss 28 is provided at the bottom of the inner hole of the cooling pipe 5 and is connected to the outer wall of the air blowing pipe 8. The bottom of the air blowing pipe 8 is positioned by the second annular boss 28 and welded and fixed, which has a good airtight effect and avoids water and air leakage problems.

[0038] In summary, the air blowing mechanism for generating internal threads in a blow molding machine as described in this utility model can meet the needs of blow molding production of plastic buckets, assist in generating internal threads in plastic buckets, improve the cooling effect, and avoid water leakage problems.

[0039] The above are merely embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A blowing mechanism for generating internal threads in a blow molding machine, characterized in that, include: The system comprises a servo motor, a mounting base, an air blowing pipe, a cooling block, a cooling jacket, and a cooling pipe. The cooling block is mounted on the mounting base and has a guide hole corresponding to the cooling jacket. The cooling jacket is disposed in the guide hole and extends upward. The servo motor is mounted at the bottom of the mounting base. The bottom of the cooling jacket has a connector for connecting to the servo motor's shaft. The cooling pipe is concentrically disposed within the cooling jacket, and the air blowing pipe is concentrically disposed within the cooling pipe. The upper end of the cooling pipe has a limiting sleeve that fits onto the air blowing pipe and extends above the cooling jacket. The bottom of the outer circumference of the cooling pipe has a first annular boss corresponding to the inner wall of the cooling jacket. An external cooling channel is formed between the inner wall of the cooling jacket and the outer wall of the cooling pipe, located above the first annular boss. The inner wall of the cooling pipe and the air blowing pipe... An inner cooling channel is formed between the outer walls of the tubes. A first water outlet hole communicating with the inner cooling channel is radially provided on the first annular protrusion. A second water outlet hole communicating with the first water outlet hole is radially provided in the cooling sleeve. A third water outlet hole communicating with the second water outlet hole is provided on one side of the cooling block. A first water inlet hole communicating with the outer cooling channel is radially provided in the cooling sleeve. A second water inlet hole communicating with the first water inlet hole is provided on one side of the cooling block. A third water inlet hole communicating with the outer cooling channel and the inner cooling channel is provided on the upper part of the cooling tube. A threaded groove is provided on the upper part of the outer wall of the cooling sleeve. A first air inlet hole communicating with the air blowing pipe is radially provided at the bottom of the outer wall of the cooling sleeve. A second air inlet hole communicating with the first air inlet hole is provided on one side of the cooling block.

2. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 1, characterized in that, The limiting sleeve is provided with a fastening nut located at the top of the cooling sleeve, and the outer circle of the limiting sleeve is provided with an external thread corresponding to the fastening nut.

3. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 1, characterized in that, The outer circle of the first annular boss is recessed with a first annular groove corresponding to the first water outlet hole, and the first water outlet hole is distributed in an annular array in the first annular groove.

4. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 1, characterized in that, The second water outlet is arranged in a ring array on the cooling jacket. The inner wall of the guide hole is provided with a second annular groove corresponding to the second water outlet. The third water outlet is connected to the second annular groove.

5. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 1, characterized in that, The first water inlet holes are arranged in a ring array on the cooling jacket. The inner wall of the guide hole is provided with a third annular groove corresponding to the first water inlet hole. The second water inlet hole is connected to the third annular groove.

6. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 1, characterized in that, The bottom of the inner hole of the cooling pipe is provided with a second annular boss that connects to the outer wall of the air blowing pipe.

7. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 1, characterized in that, The top of the cooling sleeve is provided with a through hole corresponding to the limiting sleeve, and a first sealing ring is provided in the through hole. A second sealing ring is provided on both sides of the first water outlet on the first annular protrusion.

8. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 1, characterized in that, A third sealing ring is provided at an interval in the guide hole, and the third sealing ring is located on both sides of the second water inlet and the third water outlet.

9. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 8, characterized in that, The third sealing ring is a Glyd ring.

10. The air blowing mechanism for generating internal threads in a blow molding machine according to claim 1, characterized in that, The first air inlet is arranged in a ring array at the bottom of the outer wall of the cooling jacket. The guide hole is recessed and has a fourth annular groove corresponding to the first air inlet. The second air inlet is connected to the fourth annular groove.

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