Adjustment device for fine adjustment of a die in an extrusion blow molding machine

Abstract

This utility model discloses an adjustment device for fine-tuning the die head in an extrusion blow molding machine, comprising: a frame platform; a die head support rotatably mounted on the frame platform; a support with an adjustment hole on the side wall of the frame platform; an adjustment nut oscillatingly mounted in the support; a semi-threaded shaft threadedly connected to the adjustment nut; the threaded section of the semi-threaded shaft extending into the adjustment hole of the support; adjustment clearances provided between the threaded section of the semi-threaded shaft, the adjustment hole, and the frame platform; a bearing mounted on the smooth section of the semi-threaded shaft; a bearing seat fitted on the bearing; the bearing seat oscillatingly connected to the die head support; a geared motor fixedly connected to the bearing seat; the geared motor connected to the smooth section of the semi-threaded shaft; and the geared motor electrically connected to a central control panel. The advantages of this utility model are that it allows for convenient and safe die head adjustment while improving the adjustment accuracy of the die head.

Description

Technical Field

[0001] This utility model relates to the field of extrusion blow molding machines, and more particularly to an adjustment device for fine-tuning the die head in an extrusion blow molding machine. Background Technology

[0002] After long-term operation or mold replacement, the center line of the die head and the center line of the mold cavity may shift in an extrusion blow molding machine. This misalignment leads to uneven plastic flow, affecting the quality of the finished product. Currently, the die head is mounted on a die head bracket, which is rotatably mounted on the machine frame platform. When the die head becomes misaligned with the mold cavity, manual adjustment of the die head can be performed by rotating the die head bracket. However, manual adjustment is inefficient, inconvenient, and potentially dangerous. Utility Model Content

[0003] The purpose of this invention is to provide a safe and convenient adjustment device for fine-tuning the die head in an extrusion blow molding machine.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: an adjustment device for fine-tuning the die head in an extrusion blow molding machine, comprising: a frame platform, a die head support rotatably mounted on the frame platform, a support with an adjustment hole mounted on the side wall of the frame platform, an adjustment nut oscillatingly mounted in the support, a semi-threaded shaft threadedly connected to the adjustment nut, the threaded section of the semi-threaded shaft extending into the adjustment hole of the support, an adjustment gap being left between the threaded section of the semi-threaded shaft, the adjustment hole, and the frame platform, a bearing mounted on the smooth section of the semi-threaded shaft, a bearing seat mounted on the bearing, the bearing seat oscillatingly connected to the die head support, a reduction motor fixedly connected to the bearing seat, the reduction motor connected to the smooth section of the semi-threaded shaft, and the reduction motor electrically connected to the central control panel.

[0005] Furthermore, in the aforementioned extrusion blow molding machine, the adjustment device for fine-tuning the die head includes a connection structure between the adjusting nut and the support as follows: a first swing flange is fixedly connected to the adjusting nut, a first rotating shaft is respectively provided at the upper and lower ends of the first swing flange, a first perforated plate is respectively provided at the upper and lower ends of the support, a first rotating hole is provided on the first perforated plate, and the two first rotating shafts on the first swing flange are respectively engaged in the first rotating holes of the two first perforated plates.

[0006] Furthermore, in the aforementioned extrusion blow molding machine, the adjustment device for fine-tuning the die head includes a connection structure between the bearing seat and the die head support as follows: a second swing flange is provided on the bearing seat, a second rotating shaft is provided at the upper and lower ends of the second swing flange, a U-shaped frame is provided on the die head support, a second rotating hole is provided on the bottom wall of the U-shaped frame, a connecting plate is provided on the top wall of the U-shaped frame, the connecting plate is fixed on the die head support, a third rotating hole is provided on the connecting plate that is vertically aligned with the second rotating hole, and the two second rotating shafts on the second swing flange are respectively engaged in the second rotating hole and the third rotating hole.

[0007] Furthermore, in the aforementioned extrusion blow molding machine, the adjusting device for fine-tuning the die head includes two bearings and a convex ring on the smooth section of the semi-threaded shaft. The two bearings abut against the two side walls of the convex ring, respectively. A first shoulder is provided on the side wall of the bearing seat away from the second swing flange, and a second shoulder is provided on the side wall of the second swing flange near the bearing seat. The first shoulder, the convex ring, and the second shoulder cooperate to fix the two bearings on the smooth section of the semi-threaded shaft.

[0008] Furthermore, in the aforementioned extrusion blow molding machine, the adjustment device for fine-tuning the die head includes a connection structure between the frame platform and the die head support as follows: a receiving plate and a raising plate are provided on the frame platform; a fourth rotating hole is provided on the receiving plate; a first friction plate and a second friction plate are provided on the bottom wall of the die head support; a fifth rotating hole is provided between the die head support and the first friction plate; the diameter of the fourth rotating hole is smaller than the diameter of the fifth rotating hole; the first friction plate abuts against the receiving plate; the fifth rotating hole on the die head support is vertically aligned with the fourth rotating hole on the receiving plate; a T-shaped guide shaft is inserted between the vertically aligned fourth and fifth rotating holes; the T-shaped guide shaft is inserted into the die head support and abuts against the receiving plate; and the second friction plate abuts against the raising plate.

[0009] The advantages of this invention are as follows: the operation of the geared motor can be controlled by the central control panel, the geared motor drives the semi-threaded shaft to rotate forward or backward, and the threaded transmission between the semi-threaded shaft and the adjusting nut drives the mold head bracket to swing left and right, thereby fine-tuning the position of the mold head on the mold head bracket, thus achieving concentricity between the mold head and the mold cavity. The operation using the central control panel is both convenient and safe, and the threaded transmission between the adjusting nut and the semi-threaded shaft can achieve both smooth adjustment and improved adjustment accuracy. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the adjustment device for fine-tuning the die head in the extrusion blow molding machine described in this utility model.

[0011] Figure 2 yes Figure 1 A partial cross-sectional structural diagram.

[0012] Figure 3 yes Figure 1 A schematic diagram of the connection structure between the semi-threaded shaft, support, adjusting nut, and bearing housing.

[0013] Figure 4 yes Figure 3 A schematic diagram of the cross-sectional structure. Detailed Implementation

[0014] The technical solution of this utility model will be further described below with reference to the accompanying drawings and preferred embodiments.

[0015] like Figures 1-4 As shown, the adjustment device for fine-tuning the die head in the extrusion blow molding machine of this utility model includes: a frame platform 1, a die head support 2 rotatably mounted on the frame platform 1, a receiving plate 11 and a raising plate 12 mounted on the frame platform 1, a first friction plate 21 and a second friction plate 22 mounted on the bottom wall of the die head support 2, a fourth rotating hole opened on the receiving plate 11, and a fifth rotating hole opened between the die head support 2 and the first friction plate 21. The diameter of the fourth rotating hole is smaller than the diameter of the fifth rotating hole. The first friction plate 21 on the die head support 2 abuts against the receiving plate 11. The fifth rotating hole is vertically aligned with the fourth rotating hole. A T-shaped guide shaft 23 is inserted between the vertically aligned fourth and fifth rotating holes. The T-shaped guide shaft 23 is inserted into the die head support 2 and abuts against the receiving plate 11. The second friction plate 22 on the die head support 2 abuts against the raising plate 12. When the mold head support 2 swings around the T-shaped guide shaft 23, the first friction plate 21 rubs against the receiving plate 11, and the second friction plate 22 rubs against the shim plate 12. During the friction process, only the first friction plate 21, the second friction plate 22, the receiving plate 11, and the shim plate 12 will wear, which can prevent wear on the mold head support 2 and the machine frame platform 1. When the first friction plate 21, the second friction plate 22, the receiving plate 11, or the shim plate 12 wears, the mold head support 2 and the machine frame platform 1 will not be parallel, resulting in the mold head on the mold head support 2 and the mold cavity being misaligned vertically. At this time, the worn first friction plate 21, the second friction plate 22, the receiving plate 11, or the shim plate 12 can be replaced, and there is no need to repair the mold head support 2 and the machine frame platform 1.

[0016] A support 3 with an adjustment hole 31 is provided on the side wall of the frame platform 1. An adjustment nut 4 is oscillatingly installed in the support 3. A first swing flange 41 is fixedly connected to the adjustment nut 4. A first rotating shaft 411 is provided at the upper and lower ends of the first swing flange 41. A first perforated plate 32 is provided at the upper and lower ends of the support 3. A first rotating hole is provided on the first perforated plate 32. The two first rotating shafts 411 on the first swing flange 41 are respectively engaged in the first rotating holes of the two first perforated plates 32. A semi-threaded shaft 5 is threadedly connected to the adjustment nut 4. The threaded section of the semi-threaded shaft 5 extends into the adjustment hole 31 of the support 3. An adjustment clearance is provided between the threaded section of the semi-threaded shaft 5, the adjustment hole 31, and the frame platform 1. Two bearings 51 and a convex ring 52 are provided on the smooth section of the semi-threaded shaft 5. The two bearings 51 abut against the two side walls of the convex ring 52 respectively. Bearing seats 53 are fitted on the two bearings 51. The second swing flange 54 has a second rotating shaft 541 at its upper and lower ends. A first shoulder 531 is provided on the side wall of the bearing seat 53 away from the second swing flange 54, and a second shoulder 542 is provided on the side wall of the second swing flange 54 near the bearing seat 53. The first shoulder 531, the convex ring 52, and the second shoulder 542 cooperate to fix the two bearings 51 on the smooth section of the semi-threaded shaft 5. A U-shaped frame 6 is provided on the mold head bracket 2. A second rotating hole is provided on the bottom wall of the U-shaped frame 6. A connecting plate 61 is provided on the top wall of the U-shaped frame 6. A third rotating hole is provided on the connecting plate 61, which is aligned vertically with the second rotating hole. The two second rotating shafts 541 on the second swing flange 54 are respectively locked in the second rotating hole and the third rotating hole. The connecting plate 61 is fixed on the mold head bracket 2. A reduction motor 7 is fixedly connected to the bearing seat 53. The reduction motor 7 is connected to the smooth section of the semi-threaded shaft 5 and electrically connected to the central control console.

[0017] When there is left or right eccentricity between the mold head on the mold head support 2 and the mold cavity, the operator can drive the reduction motor 7 to rotate forward or reverse through the central control panel. When the reduction motor 7 rotates forward or reverse, it will drive the semi-threaded shaft 5 to rotate forward or reverse. When the semi-threaded shaft 5 rotates forward, it will move towards the machine frame platform 1 through the thread transmission between the threaded section and the adjusting nut 4. When the semi-threaded shaft 5 rotates in reverse, it will move away from the machine frame platform 1. When the semi-threaded shaft 5 moves, it will pull the U-shaped frame 6 to swing the mold head support 2 around the T-shaped guide shaft 23, thereby fine-tuning the mold head on the mold head support 2 to make the mold head and the mold cavity concentric. When the die head support 2 swings, it will cause the U-shaped frame 6 to swing together. The positions of the U-shaped frame 6 and the second swing flange 54 will change, while the position of the support 3 fixed on the frame platform 1 remains unchanged. At this time, the second swing flange 54, which is rotatably set in the U-shaped frame 6, will rotate. The second swing flange 54 will drive the bearing seat 53, the reduction motor 7 and the semi-threaded shaft 5 to rotate together. When the semi-threaded shaft 5 rotates, it will take the first swing flange 41 to rotate in the support 3. In this way, it will not interfere with the swing of the die head support 2, nor will it damage the semi-threaded shaft 5.

[0018] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the specific implementation of this utility model. Any modifications or equivalent substitutions that do not depart from the spirit and scope of this utility model should be covered within the protection scope of the claims of this utility model.

Claims

1. An adjustment device for fine-tuning the die head in an extrusion blow molding machine, including: A frame platform, on which a mold head support is rotatably mounted, is characterized by: a support with an adjustment hole on the side wall of the frame platform; an adjusting nut oscillatingly mounted in the support; a semi-threaded shaft threadedly connected to the adjusting nut; the threaded section of the semi-threaded shaft extending into the adjustment hole of the support; an adjustment clearance between the threaded section of the semi-threaded shaft, the adjustment hole, and the frame platform; a bearing mounted on the smooth section of the semi-threaded shaft; a bearing housing fitted onto the bearing; the bearing housing oscillatingly connected to the mold head support; a geared motor fixedly connected to the bearing housing; the geared motor connected to the smooth section of the semi-threaded shaft; and the geared motor electrically connected to the central control console.

2. The adjusting device for fine-tuning the die head in the extrusion blow molding machine according to claim 1, characterized in that: The connection structure between the adjusting nut and the support is as follows: a first swing flange is fixedly connected to the adjusting nut, a first rotating shaft is provided at the upper and lower ends of the first swing flange, a first perforated plate is provided at the upper and lower ends of the support, a first rotating hole is provided on the first perforated plate, and the two first rotating shafts on the first swing flange are respectively locked in the first rotating holes of the two first perforated plates.

3. The adjusting device for fine-tuning the die head in the extrusion blow molding machine according to claim 1, characterized in that: The connection structure between the bearing housing and the mold head support is as follows: a second swing flange is provided on the bearing housing, a second rotating shaft is provided at the upper and lower ends of the second swing flange, a U-shaped frame is provided on the mold head support, a second rotating hole is provided on the bottom wall of the U-shaped frame, a connecting plate is provided on the top wall of the U-shaped frame, the connecting plate is fixed on the mold head support, a third rotating hole is provided on the connecting plate that is aligned vertically with the second rotating hole, and the two second rotating shafts on the second swing flange are respectively engaged in the second rotating hole and the third rotating hole.

4. The adjusting device for fine-tuning the die head in the extrusion blow molding machine according to claim 3, characterized in that: Two bearings and a convex ring are provided on the smooth section of the semi-threaded shaft. The two bearings abut against the two side walls of the convex ring respectively. A first shoulder is provided on the side wall of the bearing housing away from the second swing flange, and a second shoulder is provided on the side wall of the second swing flange near the bearing housing. The first shoulder, the convex ring and the second shoulder cooperate to fix the two bearings on the smooth section of the semi-threaded shaft.

5. The adjusting device for fine-tuning the die head in the extrusion blow molding machine according to claim 1, characterized in that: The connection structure between the frame platform and the mold head support is as follows: a receiving plate and a shim plate are provided on the frame platform. A fourth rotating hole is provided on the receiving plate. A first friction plate and a second friction plate are provided on the bottom wall of the mold head support. A fifth rotating hole is provided between the mold head support and the first friction plate. The diameter of the fourth rotating hole is smaller than that of the fifth rotating hole. The first friction plate abuts against the receiving plate. The fifth rotating hole on the mold head support is vertically aligned with the fourth rotating hole on the receiving plate. A T-shaped guide shaft is inserted between the vertically aligned fourth and fifth rotating holes. The T-shaped guide shaft is inserted into the mold head support and abuts against the receiving plate. The second friction plate abuts against the shim plate.

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