Double-servo crank arm type bottom die linkage die opening and closing mechanism of bottle blowing machine

Abstract

A double-servo crank arm type bottom die linkage die opening and closing mechanism of a bottle blowing machine comprises a bottom plate and a top plate, a left fixed die plate and a right fixed die plate are arranged between the bottom plate and the top plate, a left movable die plate and a right movable die plate are arranged on the upper portion of the bottom plate, the bottoms of the left movable die plate and the right movable die plate are in sliding fit with the bottom plate through sliding devices, and stretching and blowing dies are arranged on the corresponding sides of the left movable die plate and the right movable die plate respectively. A bottom mold plate is arranged on the bottom plate between the left movable mold plate and the right movable mold plate and connected with one movable mold plate through a lifting guide device, a mold opening and closing chain plate is arranged between the movable mold plates and the fixed mold plate, a chain plate shaft is arranged in the middle of the mold opening and closing chain plate and driven by power to move up and down, one end of the mold opening and closing chain plate is connected with the movable mold plates through shaft pins, and the other end of the mold opening and closing chain plate is connected with the fixed mold plate. And the other end of the mold opening and closing chain plate is connected with the fixed mold plate. The double servo motors are adopted to respectively drive the left movable mold plate, the right movable mold plate and the drawing and blowing mold to perform mold opening and closing actions, operation is stable and reliable, the speed is higher, the production efficiency is higher, and the high-speed production requirement is met.

Description

Technical Field

[0001] This utility model relates to blow molding machines, and in particular to a dual-servo articulated arm bottom mold linkage opening and closing mechanism for blow molding machines, belonging to the field of plastic machinery. Background Technology

[0002] Blow molding machines are commonly used equipment for producing hollow plastic containers (such as mineral water bottles, beverage bottles, and oil bottles). They mainly consist of a heating device, a conveying mechanism, and a stretch blow molding mechanism. The stretch blow molding mechanism houses the stretch blow mold, which is opened and closed by an opening and closing mechanism. Traditional blow molding machines typically use hydraulic or pneumatic cylinders to drive the moving platen and stretch blow mold to perform the opening and closing actions. These cylinders are usually horizontally mounted on the outer wall of the fixed platen. Especially in bidirectional opening and closing mold structures, hydraulic or pneumatic cylinders need to be horizontally mounted on the outer walls of both fixed platens, resulting in an increased overall size of the blow molding machine, a larger footprint, and higher manufacturing costs. Therefore, someone applied for a Chinese utility model patent, such as publication number CN104129068A, which discloses a "molding opening and closing device for a blow molding machine". This structure uses a vertically arranged cylinder to drive a drive seat to slide back and forth. The drive seat is provided with a left and right opening and closing mold curve groove. The left and right opening and closing mold curve grooves cooperate with the opening and closing mold mating parts under the left and right mold seats to realize the opening and closing action of the left and right bottle body molds. The disadvantages of this structure are: First, the cylinder is arranged vertically. Although the volume is much smaller than the hydraulic cylinders arranged horizontally on both sides, it still occupies the longitudinal space of the blow molding machine, so it still has the disadvantage of being relatively large; Second, it cannot drive the bottom mold in linkage. For hollow containers with characteristic bottoms, it cannot achieve automatic demolding, which is no longer suitable for the requirements of current high-speed production. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a dual-servo articulated arm bottom mold linkage opening and closing mechanism for a blow molding machine that features fast mold opening and closing speed, linkage between the bottom mold plate and the mold plate, high operational stability, and high efficiency and energy saving.

[0004] The technical solution of the dual-servo curved arm type bottom mold linkage opening and closing mold mechanism of the present invention for a blow molding machine is as follows: it includes a bottom plate and a top plate, with two fixed mold plates (left and right) set between the bottom plate and the top plate. Two movable mold plates (left and right) are set on the upper part of the bottom plate. The bottom of the two movable mold plates slides with the bottom plate via a sliding device. A blow molding die is set on one side of each of the two movable mold plates. A bottom mold plate is set on the bottom plate between the two movable mold plates. The bottom mold plate is connected to one of the movable mold plates via a lifting guide device. An opening and closing mold chain plate is set between the movable mold plate and the fixed mold plate. A chain plate shaft is set in the middle of the opening and closing mold chain plate. The chain plate shaft moves up and down driven by a power source. One end of the opening and closing mold chain plate is connected to the movable mold plate via a pin, and the other end of the opening and closing mold chain plate is connected to the fixed mold plate.

[0005] Furthermore, the power source includes two servo motors installed on the lower part of the base plate, and the output shafts of the servo motors drive the chain plate shaft of the opening and closing mold chain plate via a linkage device.

[0006] Furthermore, the linkage device includes a first bearing seat and a second bearing seat, which are respectively fixed to the bottom of the base plate. The output shaft of the servo motor cooperates with the first bearing seat. A first rotating arm is fixedly mounted on the output shaft of the servo motor. The other end of the first rotating arm is rotatably connected to the linkage arm. The other end of the linkage arm is rotatably connected to the second rotating arm. A rotating shaft is set in the second bearing seat. One end of the rotating shaft is rotatably connected to the second rotating arm. An opening and closing mold rotating arm is fixedly mounted on the rotating shaft. The other end of the opening and closing mold rotating arm is rotatably connected to the lower end of the opening and closing mold swing arm. The upper end of the opening and closing mold swing arm is rotatably connected to the chain plate shaft.

[0007] Furthermore, the opening and closing mold chain plate consists of two sets, upper and lower, with a linkage rod installed between the chain plate shafts of the upper and lower sets of opening and closing mold chain plates.

[0008] Furthermore, the sliding device includes an upper slide rail on the upper part of the base plate and an upper slider on the bottom of the moving template, wherein the moving template slides in cooperation with the upper slide rail via the upper slider.

[0009] Furthermore, the lifting guide device includes a lower slider at the bottom of the base plate, a slide plate slidably connected to the lower part of the lower slider, a slide plate fixedly connected to the moving template on the left or right side, a lifting guide groove in the slide plate, and a guide shaft at the bottom of the base template, which cooperates with the guide groove.

[0010] Furthermore, a pressure plate is provided between the fixed template and the opening / closing mold chain plate.

[0011] The beneficial effects of this utility model of a dual-servo articulated arm bottom mold linkage opening and closing mechanism for a blow molding machine are as follows: First, the use of dual servo motors to drive the left and right moving templates and the blow molding die to perform opening and closing actions makes the operation more stable and reliable, faster, and more efficient, meeting the requirements of high-speed production; Second, when the moving template is opening and closing, the bottom template is driven to rise and fall synchronously through the lifting guide device, so that the bottom mold on the bottom template and the blow molding die on the moving template can be linked, making the action more precise and the synchronization better. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of a double servo curved arm bottom mold linkage opening and closing mechanism for a blow molding machine according to this utility model;

[0013] Figure 2 yes Figure 1 A magnified view of part A;

[0014] Figure 3This is a three-dimensional schematic diagram of a double-servo curved arm bottom mold linkage opening and closing mechanism for a blow molding machine according to this utility model.

[0015] Figure 4 yes Figure 3 A magnified view of part B. Detailed Implementation

[0016] This utility model relates to a dual-servo articulated arm bottom mold linkage opening and closing mechanism for a blow molding machine, such as... Figure 1 — Figure 4 As shown, the device includes a base plate 1 and a top plate 2. Two fixed templates 3, one on the left and one on the right, are set between the base plate 1 and the top plate 2. Two movable templates 4, one on the left and one on the right, are set on the upper part of the base plate 1. The bottom of the two movable templates 4 are slidably engaged with the base plate 1 via a sliding device. A blow molding die 5 is set on the corresponding side of the two movable templates 4. A bottom template 6 is set on the base plate 1 between the two movable templates 4. The bottom template 6 is connected to one of the movable templates 4 via a lifting guide device. An opening and closing mold chain plate 7 is set between the movable template 4 and the fixed template 3. A chain plate shaft 17 is set in the middle of the opening and closing mold chain plate 7. The chain plate shaft 17 is driven up and down by a power source. One end of the opening and closing mold chain plate 7 is connected to the movable template 4 via a shaft pin, and the other end of the opening and closing mold chain plate 7 is connected to the fixed template 3.

[0017] Furthermore, the power source includes two servo motors 8 mounted on the lower part of the base plate 1. The output shafts of the servo motors 8 drive the chain plate shaft 17 of the opening and closing mold chain plate 7 via a linkage device. Using servo motors 8 as the power source to drive the linkage device results in more stable and reliable operation, faster speed, and higher efficiency.

[0018] Furthermore, the linkage device includes a first bearing seat 9 and a second bearing seat 10. The first bearing seat 9 and the second bearing seat 10 are respectively fixed to the bottom of the base plate 1. The output shaft of the servo motor 8 cooperates with the first bearing seat 9. A first rotating arm 11 is fixedly arranged on the output shaft of the servo motor 8. The other end of the first rotating arm 11 is rotatably connected to the linkage arm 12. The other end of the linkage arm 12 is rotatably connected to the second rotating arm 13. A rotating shaft 14 is arranged in the second bearing seat 10. One end of the rotating shaft 14 is rotatably connected to the second rotating arm 13. An opening and closing mold rotating arm 15 is fixedly arranged on the rotating shaft 14. The other end of the opening and closing mold rotating arm 15 is rotatably connected to the lower end of the opening and closing mold swing arm 16. The upper end of the opening and closing mold swing arm 16 is rotatably connected to the chain plate shaft 17.

[0019] Furthermore, the opening and closing mold chain plate 7 consists of two sets, upper and lower, with a linkage rod 18 provided between the chain plate shafts 17 of the upper and lower sets of opening and closing mold chain plates 7. The operation of the upper and lower sets of opening and closing mold chain plates 7 is more reliable.

[0020] Furthermore, the sliding device includes an upper slide rail 19 on the upper part of the base plate 1 and an upper slider 20 on the bottom of the moving template 4, wherein the moving template 4 slides in cooperation with the upper slide rail 19 via the upper slider 20.

[0021] Furthermore, the lifting guide device includes a lower slider 21 set at the lower part of the base plate 1, a slide plate 22 slidably connected at the lower part of the lower slider 21, the slide plate 22 being fixedly connected to the moving template 4 on the left or right side, a lifting guide groove 23 being opened in the slide plate 22, and a guide shaft 24 being set at the bottom of the base template 6, the guide shaft 24 cooperating with the guide groove 23.

[0022] Furthermore, a pressure plate 25 is provided between the fixed template 3 and the opening and closing mold chain plate 7.

[0023] The beneficial effects of this utility model of a double servo-driven curved arm bottom mold linkage opening and closing mechanism for a blow molding machine are as follows: During operation, the output shafts of the servo motors 8 on both the left and right sides simultaneously drive the first rotating arm 11 to rotate. The first rotating arm 11, via the linkage arm 12, drives the second rotating arm 13 to swing up and down around the axis 13. (There are two first rotating arms 11, one in front and one behind, with the linkage arm 12 sandwiched between them. Therefore, when the first rotating arm 11 rotates, it drives the linkage arm 12 to swing left and right. The other end of the linkage arm 12 then drives the second rotating arm 12 to swing up and down around the axis 14.) The second rotating arm 13 drives the opening and closing mold rotating arm 15 to swing up and down via the rotating shaft 14. The opening and closing mold rotating arm 15 drives the opening and closing mold swing arm 16 to rise and fall. When the opening and closing mold swing arm 16 moves upward, it pushes the chain plate shaft 17 in the middle of the opening and closing mold chain plate 7 to move upward. The chain plate shaft 17 drives the opening and closing mold chain plates 7 on both sides to unfold, thereby driving the moving template 4 to slide with the upper slide rail 19 via the upper slider 20. The moving template 4 moves away from the fixed template 3 (that is, the moving templates 4 on the left and right sides move closer to each other). The moving template 4 drives the blow molding die 5 to move closer to each other and close the mold. Simultaneously, one of the moving templates 4 drives the slide plate 22 to slide along the lower slide plate 21. The lifting guide groove 23 in the slide plate 22 cooperates with the guide shaft 24 of the bottom template 6. Under the guidance of the guide groove 23, the bottom template 6 moves upward. At this time, the bottom mold on the bottom template 6 and the stretch blow molding die 5 close synchronously, which can stretch blow mold the bottle in the stretch blow molding die 5. After the bottle is stretch blow molded, the servo motor continues to drive the first rotating arm 11 to rotate. The first rotating arm 11 drives the second rotating arm 13 to swing downward around the rotating shaft 13 as the axis via the linkage arm 12. The opening and closing mold rotating arm 15 is driven by the rotating shaft 14 to swing downward. The opening and closing mold rotating arm 15 drives the opening and closing mold swing arm 16 to move downward. The opening and closing mold swing arm 16 drives the chain plate shaft 17 in the middle of the opening and closing mold chain plate 7 to move downward. The chain plate shaft 17 drives the opening and closing mold chain plates 7 on both sides to fold into a "V" shape. The opening and closing mold chain plate 7 drives the moving mold plate 4 to move towards the side close to the fixed mold plate 3, so that the moving mold plate 4 drives the blow molding die 5 to open. At the same time, the bottom mold plate 6 also descends under the action of the guide shaft 24 and the lifting guide groove 23 of the slide plate 22, which can prepare for the next mold closing blow molding action.

Claims

1. A dual-servo articulated arm type bottom mold linkage opening and closing mechanism for a blow molding machine, characterized in that: The system includes a base plate (1) and a top plate (2). Two fixed templates (3) are set between the base plate (1) and the top plate (2). Two movable templates (4) are set on the upper part of the base plate (1). The bottom of the two movable templates (4) slides with the base plate (1) via a sliding device. A blow molding die (5) is set on the corresponding side of the two movable templates (4). A bottom template (6) is set on the base plate (1) between the two movable templates (4). The bottom template (6) is connected to one of the movable templates (4) via a lifting guide device. An opening and closing mold chain plate (7) is set between the movable template (4) and the fixed template (3). A chain plate shaft (17) is set in the middle of the opening and closing mold chain plate (7). The chain plate shaft (17) moves up and down by power. One end of the opening and closing mold chain plate (7) is connected to the movable template (4) via a shaft pin. The other end of the opening and closing mold chain plate (7) is connected to the fixed template (3).

2. The dual-servo articulated arm type bottom mold linkage opening and closing mechanism for a blow molding machine as described in claim 1, characterized in that: The power source includes two servo motors (8) installed on the lower part of the base plate (1). The output shaft of the servo motor (8) drives the chain plate shaft (17) of the opening and closing mold chain plate (7) through a linkage device.

3. The dual-servo articulated arm bottom mold linkage opening and closing mechanism for a blow molding machine as described in claim 2, characterized in that: The linkage device includes a first bearing seat (9) and a second bearing seat (10). The first bearing seat (9) and the second bearing seat (10) are respectively fixed to the bottom of the base plate (1). The output shaft of the servo motor (8) is engaged with the first bearing seat (9). A first rotating arm (11) is fixedly installed on the output shaft of the servo motor (8). The other end of the first rotating arm (11) is rotatably connected to the linkage arm (12). The other end of the linkage arm (12) is rotatably connected to the second rotating arm (13). A rotating shaft (14) is installed in the second bearing seat (10). One end of the rotating shaft (14) is rotatably connected to the second rotating arm (13). An opening and closing mold rotating arm (15) is fixedly installed on the rotating shaft (14). The other end of the opening and closing mold rotating arm (15) is rotatably connected to the lower end of the opening and closing mold swing arm (16). The upper end of the opening and closing mold swing arm (16) is rotatably connected to the chain plate shaft (17).

4. The dual-servo articulated arm type bottom mold linkage opening and closing mechanism for a blow molding machine as described in claim 3, characterized in that: The opening and closing mold chain plate (7) consists of two sets, upper and lower, with a linkage rod (18) provided between the chain plate shaft (17) of the upper and lower sets of opening and closing mold chain plates (7).

5. The dual-servo articulated arm bottom mold linkage opening and closing mechanism for a blow molding machine as described in claim 1, characterized in that: The sliding device includes an upper slide rail (19) on the upper part of the base plate (1) and an upper slider (20) on the bottom of the moving template (4). The moving template (4) slides with the upper slide rail (19) via the upper slider (20).

6. The dual-servo articulated arm type bottom mold linkage opening and closing mechanism for a blow molding machine as described in claim 1, characterized in that: The lifting guide device includes a lower slider (21) set at the bottom of the base plate (1), a sliding plate (22) slidably connected at the bottom of the lower slider (21), the sliding plate (22) being fixedly connected to the moving template (4) on the left or right side, a lifting guide groove (23) being opened in the sliding plate (22), and a guide shaft (24) being set at the bottom of the bottom template (6), the guide shaft (24) cooperating with the guide groove (23).

7. The dual-servo articulated arm bottom mold linkage opening and closing mechanism for a blow molding machine as described in claim 1, characterized in that: A pressure plate (25) is provided between the fixed template (3) and the opening and closing mold chain plate (7).

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