Double-station blow molding machine

Abstract

The utility model discloses a double-station blow molding machine which comprises a machine body, a cavity is formed in the machine body, an extrusion device used for extruding a plastic parison is installed in the cavity, blowing devices are arranged on the two sides of the extrusion device, the blowing devices are installed in the cavity, a mold closing device is installed in the cavity, and the mold closing device is connected with the extrusion device. The mold closing device comprises a mounting plate, a bracket, a supporting rod, a first air cylinder, a connecting rod, a mold assembly, a moving assembly and a discharging assembly, and the problems that a common blow molding machine generally has only one station and only one set of mold closing device, and in the actual use process, the extrusion device needs to wait for the actions of the mold closing device and the blowing device, so that the production efficiency is high are solved. Therefore, the problems that the extrusion device cannot work continuously, the utilization rate of the extrusion device is reduced, and the production efficiency of a factory is also reduced are solved.

Description

Technical Field

[0001] This utility model relates to the field of blow molding equipment technology, and in particular to a dual-station blow molding machine. Background Technology

[0002] Blow molding, also known as hollow blow molding or extrusion blow molding, is a method for manufacturing hollow thermoplastic parts. The raw materials are heated and melted through an extrusion device, and the plastic preform is finally extruded into the corresponding mold. Then, it is blown and shaped by blow molding equipment. Common blow-molded objects include bottles, barrels, cans, boxes, and all containers for packaging food, beverages, cosmetics, medicines, and daily necessities.

[0003] However, ordinary blow molding machines typically have only one station, meaning they only have one set of mold clamping devices. In actual use, the extrusion unit needs to wait for the mold clamping device and the blowing device to operate, which results in the extrusion unit being unable to work continuously, reducing the utilization rate of the extrusion unit and also reducing the factory's production efficiency. Utility Model Content

[0004] This application provides a dual-station blow molding machine, which can solve the problem that ordinary blow molding machines, which only have one working position, cause the extrusion unit to wait for the mold closing device and the blowing device to operate, thus affecting the utilization rate of the extrusion unit and the factory production efficiency.

[0005] This application provides a dual-station blow molding machine, including a machine body with a cavity. An extrusion device for extruding plastic preforms is installed within the cavity. Air blowing devices are arranged on both sides of the extrusion device and are installed within the cavity. A mold clamping device is installed within the cavity. The mold clamping device includes a mounting plate, a bracket, support rods, a cylinder, a connecting rod, a mold assembly, a moving assembly, and a feeding assembly. The moving assembly is mounted on the machine body and located within the cavity. The mounting plate is connected to the moving assembly. Brackets are installed at both ends of the mounting plate. A set of support rods is arranged on both sides of the extrusion device. Two sets of support rods are mounted on the brackets. Mold assemblies are mounted on the two sets of support rods. Connecting rods are mounted on the two sets of mold assemblies. One end of the cylinder is hinged to the connecting rod, and the other end of the cylinder is hinged to the mounting plate. Through slots are opened on both sides of the machine body, penetrating the cavity. Feeding assemblies are installed on the through slots.

[0006] Furthermore, the mold assembly includes a fixed block, a slider one, a mold cavity one, a mold cavity two, and a fixed sleeve. The fixed block is fixedly connected to the support rod, the mold cavity one is fixedly connected to the fixed block, the slider one slides on the support rod, the mold cavity two is fixedly connected to the slider one, a fixed sleeve is fixedly connected to the slider one, the fixed sleeve slides on the support rod, and the connecting rod is fixedly connected to the fixed sleeve.

[0007] Furthermore, the moving component includes a base, a motor, a support frame, a positioning rod, a threaded rod, a second slider, and a third slider. The base is fixedly connected to the machine body. The threaded rod is arranged along the length of the base, and the two ends of the threaded rod are rotatably connected to the support frame. The support frame is fixedly connected to the base. The motor is mounted on the base and is fixedly connected to the threaded rod. The first slider cooperates with the threaded rod and is fixedly connected to the mounting plate. A positioning rod is provided on one side of the threaded rod of the third slider and is fixedly connected to the support frame. The third slider slides on the positioning rod and is fixedly connected to the mounting plate.

[0008] Furthermore, the feeding assembly includes a pallet, a second cylinder, a pry block, and a first limiting block. The pallet is fixedly connected to the machine body and is located inside the cavity. The upper surface of the pallet is flush with the bottom end of the cavity. A sliding groove is provided on the pallet, and the pry block slides in the sliding groove. The output shaft of the second cylinder is fixedly connected to the pry block. The second cylinder is fixedly connected to the machine body. First limiting blocks are provided on both sides of the sliding groove, and first limiting blocks are fixedly connected to the pallet.

[0009] Furthermore, an installation frame is provided on the outer side of the through groove, the installation frame is fixedly connected to the machine body, and a second limiting block is fixedly connected on the installation frame. The distance between the second limiting blocks is smaller than the distance between the first limiting blocks. A collection box is provided below the second limiting block, and the collection box is installed on the machine body.

[0010] In summary, this application discloses a dual-station blow molding machine. Compared with the prior art, it features two identical and symmetrical mold assemblies mounted on a mounting plate, and a moving assembly below the mounting plate to move the two mold assemblies along the length of the mounting plate. A feeding assembly is installed on each side of the machine cavity for feeding material. When the left mold assembly is feeding material, the right mold assembly simultaneously feeds material; conversely, when the right mold assembly is feeding material, the left mold assembly simultaneously feeds material. This design allows the machine to increase the utilization rate of the extrusion unit and improve factory production efficiency. Attached Figure Description

[0011] Figure 1 A perspective view of the utility model;

[0012] Figure 2 This is a side sectional view of the utility model;

[0013] Figure 3 This is a cross-sectional view of the utility model from another side;

[0014] Figure 4 This is a schematic diagram of the structure on the mounting plate of the utility model;

[0015] Figure 5 for Figure 3 A magnified view of a portion of point A in the middle.

[0016] Reference numerals in the attached drawings: 1. Machine body; 2. Cavity; 3. Extrusion device; 4. Mold closing device; 401. Mounting plate; 402. Bracket; 403. Support rod; 404. Cylinder 1; 405. Connecting rod; 406. Mold assembly; 407. Moving assembly; 408. Material feeding assembly; 5. Fixing block; 6. Slider 1; 7. Mold cavity 1; 8. Mold cavity 2; 9. Fixing sleeve; 10. Base; 11. Motor; 12. Support frame; 13. Positioning rod; 14. Threaded rod; 15. Slider 2; 16. Slider 3; 17. Support plate; 18. Cylinder 2; 19. Pulley; 20. Limiting block 1; 21. Slide groove; 22. Mounting frame; 23. Limiting block 2; 24. Collection box. Detailed Implementation

[0017] The following description is merely a preferred embodiment of this utility model, and the scope of protection is not limited to this embodiment. All technical solutions falling within the scope of this utility model should be considered within the protection scope of this utility model. It should also be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

[0018] like Figures 1 to 5 As shown, a dual-station blow molding machine includes a machine body 1, a cavity 2 formed on the machine body 1, an extrusion device 3 for extruding plastic preforms is provided in the cavity 2, the extrusion device 3 is installed on the machine body 1 and is located at the center of the cavity 2, an air blowing device is provided on each side of the extrusion device 3, the air blowing device is fixedly connected to the machine body 1 and is located in the cavity 2, and a mold clamping device 4 is provided below the extrusion device 3, the mold clamping device 4 is installed on the machine body 1 and is located in the cavity 2.

[0019] The mold clamping device 4 includes a mounting plate 401, a bracket 402, a support rod 403, a cylinder 404, a connecting rod 405, a mold assembly 406, a moving assembly 407, and a feeding assembly 408. The moving assembly 407 is mounted on the machine body 1 and is located inside the cavity 2. The mounting plate 401 is mounted on the moving assembly 407, which can drive the mounting plate 401 to move along the length of the mounting plate 401. The bracket 402 is fixedly connected to the front and rear ends of the mounting plate 401. A set of support rods 403 is provided on the left and right sides of the extrusion device 3, with two rods in each set. Each set of support rods 403 is fixedly connected to the bracket 402, and the mold assembly 408 is mounted on each set of support rods 403. 06. When the left mold assembly 406 is located below the extrusion device 3, the right mold assembly 406 is located above the right feeding assembly 408. When the right mold assembly 406 is located below the extrusion device 3, the left mold assembly 406 is located above the left feeding assembly 408. A connecting rod 405 is fixedly connected to each mold assembly 406, and the two connecting rods 405 face opposite directions. One end of cylinder 404 is hinged to the mounting plate 401, and the other end of cylinder 404 is hinged to the connecting rod 405. Through slots are provided on both sides of the machine body 1, and the through slots on both sides pass through the cavity 2. A feeding assembly 408 is provided on one side of the cavity. The feeding assembly 408 is installed on the machine body 1 and is located in the cavity 2.

[0020] The mold assembly 406 includes a fixed block 5, a slider 6, a mold cavity 7, a mold cavity 2 8, and a fixed sleeve 9. Each set of support rods 403 is fixedly connected to a fixed block 5, and a mold cavity 7 is fixedly connected to the fixed block 5. A mold cavity 2 8 is provided on one side of the mold cavity 7. The mold cavity 2 8 is fixedly connected to the slider 6. The slider 6 slides on the support rod 403. A fixed sleeve 9 is fixedly connected to the slider 6. A connecting rod 405 is fixedly connected to the fixed sleeve 9. The connecting rod 405 is pushed by a cylinder 404 so that the mold cavity 2 8 can be separated from or attached to the mold cavity 7. During material feeding, the mold cavity 2 8 is separated from the mold cavity 7. When the extrusion device 3 extrudes the plastic preform, the mold cavity 2 8 and the mold cavity 7 are attached.

[0021] The moving component 407 includes a base 10, a motor 11, a support frame 12, a positioning rod 13, a threaded rod 14, a second slider 15, and a third slider 16. The base 10 is fixedly connected to the body 1 and is located inside the cavity 2. A support frame 12 is fixedly connected to each of the left and right ends of the base 10, and a threaded rod 14 is rotatably connected between the two support frames 12. A motor 11 is provided on one side of the right support frame 12. The motor 11 is a reversible AC motor and is mounted on the base 10. The output of the motor 11 is fixedly connected to the threaded rod 14. Next, a second slider 15 that mates with the threaded rod 14 is provided on the threaded rod 14. The upper surface of the second slider 15 is fixedly connected to the lower surface of the mounting plate 401. A positioning rod 13 for improving stability is provided on one side of the threaded rod 14. The two ends of the positioning rod 13 are fixedly connected to the support frames 12 on the left and right sides. A third slider 16 slides on the positioning rod 13. The upper surface of the third slider 16 is fixedly connected to the lower surface of the mounting plate 401. The motor 11 is used to drive the threaded rod 14 to rotate, thereby driving the slider so that the mounting plate 401 can move left and right along the length direction of the mounting plate 401.

[0022] The feeding assembly 408 includes a support plate 17, a second cylinder 18, a lever 19, and a first limiting block 20. The support plate 17 is fixedly connected to the machine body 1 and is located inside the cavity 2. The upper surface of the support plate 17 is flush with the bottom end of the through groove. A sliding groove 21 is provided on the support plate 17, and the lever 19 is provided in the sliding groove 21. The lever 19 slides in the sliding groove 21. The second cylinder 18 is installed on the machine body 1 and is located on the outside of the machine body 1. The output shaft of the second cylinder 18 is fixedly connected to the lever 19. A limiting block 20 is provided on each side of the slide 21. The limiting block 20 is fixedly connected to the tray 17. When the plastic bottle in the mold assembly 406 is blow-molded, it is moved to the top of the tray 17 by the moving assembly 407. Then, the cylinder 404 will drive the mold cavity 8 to open, so that the molded plastic bottle falls onto the tray 17. The limiting block 1 can limit the plastic bottle to prevent it from tipping over. Finally, the cylinder 18 is activated to drive the push block 19 to push the plastic bottle out of the through groove.

[0023] Furthermore, a mounting bracket 22 is fixedly connected to the outside of the machine body 1. The mounting bracket 22 is located outside the through groove. Two limiting blocks 23 are fixedly connected to the mounting bracket 22. The center of the distance between the limiting blocks 23 is on the same straight line as the center of the distance between the limiting blocks 20. The overall height of the limiting blocks 23 is higher than that of the limiting blocks 20. The distance between the two limiting blocks 23 is smaller than the distance between the two limiting blocks 20, and the distance between the limiting blocks 23 is smaller than the overall diameter of the bottle. When the pusher 19 pushes the plastic bottle out of the through groove from the tray 17, since the diameter of the plastic bottle is larger than the distance between the two limiting blocks 23, the limiting blocks 23 will lift the entire plastic bottle. A collection box 24 is set below the limiting blocks 23 and is installed on the machine body 1. As more and more plastic bottles are completed, the plastic bottles on the limiting blocks 23 will be pushed into the collection box 24 one by one due to the pusher 19.

[0024] The working principle of the utility model is as follows: When the left mold assembly 406 is feeding into the extrusion device 3, the right mold assembly 406 is positioned directly below the right feeding assembly 408 for feeding. When the right mold assembly 406 moves to the feeding position of the extrusion device 3, the left mold assembly 406 is positioned directly above the left feeding assembly 408 for feeding. This greatly increases the utilization rate of the extrusion device 3 and the production efficiency in the factory.

Claims

1. A double-station blow molding machine comprising a machine body (1) having a cavity (2) formed therein, an extrusion device (3) for extruding a plastic parison being installed in the cavity (2), and blowing devices being provided on both sides of the extrusion device (3) and being installed in the cavity (2), characterized in that, The cavity (2) is provided with a mold closing device (4), the mold closing device (4) comprises a mounting plate (401), a support (402), a support rod (403), a cylinder (404), a connecting rod (405), a mold assembly (406), a moving assembly (407) and a blanking assembly (408), the moving assembly (407) is installed on the body (1) and located in the cavity (2), the mounting plate (401) is connected with the moving assembly (407), the both ends of the mounting plate (401) are respectively provided with a support (402), the both sides of the extrusion device (3) are respectively provided with a group of support rods (403), the two groups of support rods (403) are installed on the supports (402), the two groups of support rods (403) are provided with the mold assemblies (406), the two groups of mold assemblies (406) are provided with the connecting rods (405), one end of the cylinder (404) is hinged with the connecting rod (405), the other end of the cylinder (404) is hinged with the mounting plate (401), the both sides of the body (1) are provided with through grooves, the through grooves pass through the cavity (2), and the through grooves are provided with the blanking assembly (408).

2. A double station blow molding machine according to claim 1, characterized in that The mold assembly (406) comprises a fixed block (5), a sliding block (6), a mold cavity (7), a mold cavity (8) and a fixed sleeve (9), the fixed block (5) is fixedly connected with the support rod (403), the mold cavity (7) is fixedly connected with the fixed block (5), the sliding block (6) slides on the support rod (403), the mold cavity (8) is fixedly connected with the sliding block (6), the fixed sleeve (9) is fixedly connected with the sliding block (6), the fixed sleeve (9) slides on the support rod (403), and the connecting rod (405) is fixedly connected with the fixed sleeve (9).

3. A double station blow molding machine according to claim 2, characterized in that The moving assembly (407) comprises a base (10), a motor (11), a support frame (12), a positioning rod (13), a threaded rod (14), a sliding block (15) and a sliding block (16), the base (10) is fixedly connected with the body (1), the threaded rod (14) is arranged along the length direction of the base (10), the both ends of the threaded rod (14) are rotatably connected with the support frame (12), the support frame (12) is fixedly connected with the base (10), the motor (11) is installed on the base (10) and fixedly connected with the threaded rod (14), the sliding block (6) is matched with the threaded rod (14), the sliding block (6) is fixedly connected with the mounting plate (401), the positioning rod (13) is arranged on one side of the threaded rod (14) and fixedly connected with the support frame (12), the sliding block (16) slides on the positioning rod (13), and the sliding block (16) is fixedly connected with the mounting plate (401).

4. A double station blow molding machine according to claim 3, characterized in that The blanking assembly (408) includes a supporting plate (17), a second air cylinder (18), a shifting block (19) and a limiting block (20), the supporting plate (17) is fixedly connected to the machine body (1) and located in the cavity (2), the upper surface of the supporting plate (17) is flush with the bottom end of the air slot, a sliding slot (21) is formed in the supporting plate (17), the shifting block (19) slides in the sliding slot (21), the output shaft of the second air cylinder (18) is fixedly connected to the shifting block (19), the second air cylinder (18) is fixedly connected to the machine body (1), and the two sides of the sliding slot (21) are provided with the limiting block (20) which is fixedly connected to the supporting plate (17).

5. A double station blow molding machine according to claim 4, characterized in that The outer side of the sliding slot (21) is provided with a mounting frame (22), the mounting frame (22) is fixedly connected to the machine body (1), the mounting frame (22) is fixedly connected with the limiting block (23), the spacing between the limiting block (23) is smaller than the spacing between the limiting block (20), and the lower side of the limiting block (23) is provided with a collecting box (24), and the collecting box (24) is mounted on the machine body (1).

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