Bottle blowing machine for large-capacity plastic hollow container

Abstract

The invention belongs to the field of plastic machinery, and particularly relates to a large-capacity plastic hollow container bottle blowing machine which comprises a bottle blank conveying mechanism, a heating device, a pulling and blowing mechanism and a bottle blank overturning mechanism which are arranged in a rack, a supporting seat is arranged on the bottle blank conveying mechanism, a plastic bottle blank is inversely inserted on the supporting seat, and the supporting seat drives the plastic bottle blank to operate; a blank feeding and bottle conveying mechanical arm is arranged on the stretching and blowing mechanism and driven by a linear moving assembly to move, an overturning mechanical arm is arranged on the bottle blank overturning mechanism, a mold opening and blank taking synchronous mechanism is arranged between the stretching and blowing mechanism and the bottle blank overturning mechanism, and the stretching and blowing mechanism comprises a movable mold plate driven by a mold opening and closing mechanism to be opened and closed. The mold opening synchronous blank taking mechanism comprises a blank taking support arranged on the movable mold plate, a blank receiving plate is arranged on the blank taking support, the blank receiving plate is matched with the overturning mechanical arm during mold closing, and the blank receiving plate is matched with the blank feeding and bottle conveying mechanical arm during mold opening.

Description

Technical Field

[0001] This invention belongs to the field of plastic machinery, and specifically relates to a blow molding machine for large-capacity plastic hollow containers. Background Technology

[0002] Plastic blow molding machines are commonly used equipment for producing hollow plastic containers. They mainly consist of a preform conveying mechanism, a heating device, and a stretch blow molding mechanism. In existing technology for producing large-capacity containers (such as mineral water barrels and beer barrels), large-capacity plastic preforms are inverted (mouth down) on a support base. The preform conveying mechanism carries them into the heating device for heating. After heating, a flipping mechanism removes the preform from the support base and flips it (mouth up). A separate preform picking mechanism then picks up the preform and delivers it to the stretch blow molding mechanism (stretch blow mold). Finally, a preform feeding robot on the stretch blow molding mechanism grips the preform and feeds it into the stretch blow mold for blow molding. The above process involves many intermediate steps, each of which requires precise control. In particular, due to the large volume of large-capacity plastic preforms, the heating station and the stretch blow molding station do not correspond. An independent preform picking mechanism is required to first send the plastic preform to the stretch blow molding die before it can be picked up and fed into the stretch blow molding die by the preform feeding robot. This not only increases the direct investment cost of the equipment, but the preform picking mechanism also consumes energy, increasing production costs. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of existing technologies and provide a large-capacity plastic hollow container blow molding machine. It uses the mold opening power to drive the movement of the preform picking robot, eliminating the need for an independent preform picking mechanism, thus saving investment and energy consumption. Moreover, the mold opening and preform picking are synchronized, which is beneficial for the preform feeding and bottle delivery robot to hold the preform.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A large-capacity plastic hollow container blow molding machine includes a preform conveying mechanism, a heating device, a stretch blow molding mechanism, and a preform flipping mechanism, all mounted in a frame. The preform conveying mechanism has a support base on which plastic preforms are inverted and driven to move. The stretch blow molding mechanism has a preform feeding robot, which is driven by a linear motion component. The preform flipping mechanism has a flipping robot. A mold opening synchronous preform removal mechanism is located between the stretch blow molding mechanism and the preform flipping mechanism. The stretch blow molding mechanism includes a moving template that opens and closes driven by a mold opening and closing mechanism. The mold opening synchronous preform removal mechanism includes a preform removal bracket on the moving template, and a preform receiving plate on the bracket. When the mold is closed, the receiving plate cooperates with the flipping robot; when the mold is opened, the receiving plate cooperates with the preform feeding robot.

[0005] Furthermore, the blow molding mechanism also includes a fixed template and a rear template. The moving template, the fixed template, and the rear template are connected by guide pillars. The moving template and the rear template are slidably mounted on the base plate, and the fixed template is fixedly mounted on the base plate. A blow molding die is provided between the moving template and the fixed template, and an opening and closing mold mechanism is provided between the fixed template and the rear template.

[0006] Furthermore, four uprights are provided on the base plate. The height of the four uprights is higher than that of the moving template and the fixed template. A fixing plate is provided at the top of the four uprights. A square hole is provided on the fixing plate. A motor fixing bracket is provided below the square hole. A connecting plate is provided on the fixing plate. A slide rail fixing bracket is connected below the connecting plate.

[0007] Furthermore, the slide rail fixing frame is provided with a U-shaped groove, which cooperates with the guide post.

[0008] Furthermore, the linear motion component includes a linear slide rail, a slider is slidably mounted on the linear slide rail, a moving plate is mounted on the slider, the preform feeding and bottle delivery robot is fixed on the moving plate, a rack is mounted on the moving plate, a motor is mounted on the blow molding mechanism, and the output shaft of the motor is connected to a gear, which meshes with the rack.

[0009] Furthermore, the linear slide rail is fixed under the slide rail fixing bracket, and the motor is fixed on the motor fixing bracket.

[0010] Furthermore, the preform conveying mechanism includes an annular guide rail and a transmission sprocket. A chain is slidably arranged on the annular guide rail, and the chain cooperates with the sprocket. The sprocket is driven to rotate by a power source. A support seat is provided on the chain, and a plastic preform is inserted upside down on the support seat.

[0011] The present invention discloses a large-capacity plastic hollow container blow molding machine, characterized by a preform picker on a moving mold plate and a preform receiving plate on the picker plate. During operation, the moving mold plate closes, driving the preform receiving plate to move and cooperate with the flipping robot to catch the heated and flipped plastic preform. Then, the mold opening and closing mechanism drives the moving mold plate to open, and the preform receiving plate, along with the plastic preform, moves backward with the moving mold plate. During the mold opening process, the linear motion component drives the preform feeding robot to move to a set position and open, while the preform receiving plate continues to move backward during the mold opening process, cooperating with the preform feeding robot that has moved to the position first, so that the mouth of the plastic preform touches the open preform feeding robot. The preform feeding robot immediately closes to clamp the mouth of the plastic preform. At this time, the preform receiving plate continues to move backward with the mold opening action until the mold opening is completed, that is, the preform receiving plate completely disengages from the plastic preform. Then, the linear motion component drives the preform feeding robot to move in the opposite direction, sending the plastic preform into the stretch blow molding die for stretch blowing, and the preform picking is completed.

[0012] Compared with existing technologies, the advantages of this solution are: First, there is no need to install an independent billet taking mechanism. The billet receiving plate moves with the moving template, which can save investment costs and production energy consumption. Second, the receiving plate moves synchronously with the opening and closing of the template, which is more conducive to the plastic bottle preform being clamped by the preform feeding robot and the preform being picked up accurately. Third, the blank taking and mold opening are synchronized to improve the overall production efficiency of the machine. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an embodiment of a large-capacity plastic hollow container blow molding machine of the present invention; Figure 2 This is a schematic diagram of the cooperation between the flipping robot and the blank receiving plate in the mold closing state of the present invention; Figure 3 This is a schematic diagram of the cooperation between the preform feeding robot and the preform receiving plate in the mold opening state of this invention; Figure 4 This is a schematic diagram of the blank receiving plate of the present invention connected to the moving template; Figure 5 This is a schematic diagram of the linear motion component of the present invention; Figure 6 This is a schematic diagram of the plastic preform of the present invention being inserted upside down on the support base; Figure 7 This is a three-dimensional schematic diagram of a large-capacity plastic hollow container blow molding machine according to the present invention.

[0014] In the diagram, 1. Preform feeding robot; 2. Tilting robot; 3. Base plate; 4. Guide post; 5. Moving template; 6. Fixed template; 7. Rear template; 8. Stretch blow molding die; 9. Preform pick-up bracket; 10. Preform receiving plate; 11. Linear slide rail; 12. Slider; 13. Moving plate; 14. Rack; 15. Motor; 16. Gear; 17. Fixing plate; 18. Square hole; 19. Motor mounting bracket; 20. Slide rail mounting bracket; 21. U-shaped groove; 22. Upright pole; 23. Connecting plate; 24. Support base; 25. Circular guide rail; 26. Transmission sprocket; 27. Chain; 28. Rotating shaft; 29. ​​Rotating gear; 30. Small chain; 01. Stretch blow molding mechanism; 02. Preform tilting mechanism; 03. Linear movement component; 04. Mold opening and closing mechanism; 05. Plastic preform; 06. Preform conveying mechanism; 07. Frame; 08. Heating device. Detailed Implementation

[0015] The present invention will be described in detail below with reference to specific implementation examples. These examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0016] like Figure 1 — Figure 7As shown, this invention relates to a large-capacity plastic hollow container blow molding machine, including a preform conveying mechanism 06, a heating device 08, a stretch blow molding mechanism 01, and a preform flipping mechanism 02 arranged in a frame 07. The preform conveying mechanism 06 is equipped with a support base 24, on which a plastic preform 05 is inverted and driven to move. The stretch blow molding mechanism 01 is equipped with a preform feeding robot 1, which is driven by a linear motion component 03. The preform flipping mechanism 02 is equipped with a flipping robot 2. A mold opening synchronous preform removal mechanism is arranged between the stretch blow molding mechanism 01 and the preform flipping mechanism 02. The stretch blow molding mechanism 01 includes a moving template 5 that is driven to open and close by a mold opening and closing mechanism 04. The mold opening synchronous preform removal mechanism includes a preform removal bracket 9 on the moving template 5, and a preform receiving plate 10 on the preform removal bracket 9. When the mold is closed, the preform receiving plate 10 cooperates with the flipping robot 2; when the mold is opened, the preform receiving plate 10 cooperates with the preform feeding robot 1.

[0017] During operation, the moving mold plate 5 closes, causing the receiving plate 10 to move and cooperate with the flipping robot 2 to catch the heated and flipped plastic preform 05 (the receiving plate 10 has an arc-shaped notch at its head; when the receiving plate 10 moves, it moves to the mouth retaining ring of the plastic preform 05, where the arc-shaped notch is close to the mouth retaining ring; then the flipping robot 2 opens, and the plastic preform 05 falls, with its mouth retaining ring resting on the receiving plate 10). Next, the mold opening and closing mechanism 04 drives the moving mold plate 5 to open, and the receiving plate 10, carrying the plastic preform 05, moves backward with the moving mold plate 5. During the mold opening process, the linear motion component 03 drives the preform feeding robot 1 to move first to... The position is set and the mold opens (the linear motion component moves faster than the mold opening speed), while the receiving plate 10 continues to retreat during the mold opening process, corresponding to the preform feeding robot 1 that has moved into place first, so that the mouth of the plastic preform 05 touches the open preform feeding robot 1. The preform feeding robot 1 immediately closes to clamp the mouth of the plastic preform 05. At this time, the receiving plate 10 continues to retreat with the mold opening action until the mold opening is completed, that is, the receiving plate 10 completely disengages from the plastic preform 05. Then, the linear motion component 03 drives the preform feeding robot 1 to move in the opposite direction, sending the plastic preform 05 into the stretch blow molding die 8 for stretch blow molding, and the preform removal is completed.

[0018] In actual production, there are two preform feeding and bottle feeding robots 1. One of them is used to pick up the plastic bottle preform 05 and send it into the stretch blow molding die. The other is used to pick up the blow-formed plastic hollow container and send it out of the stretch blow molding die. The two preform feeding and bottle feeding robots 1 perform the above actions simultaneously.

[0019] In the above scheme, the preform flipping mechanism 02, the mold opening and closing mechanism 04, and the heating device 08 are all known technologies. For example, the preform flipping mechanism 02 mainly uses a flipping cylinder to drive the rotating shaft to rotate, thereby driving the flipping robot 2 on the rotating shaft to flip. There are many specific technical solutions for the mold opening and closing mechanism 04, such as a linkage elbow arm and other opening and closing structures. The heating device 08 is mainly composed of a light box, etc., which will not be described in detail here.

[0020] Furthermore, the blow molding mechanism 01 also includes a fixed template 6 and a rear template 7. The moving template 5, the fixed template 6, and the rear template 7 are connected by guide pillars 4. The moving template 5 and the rear template 7 are slidably mounted on the base plate 3, and the fixed template 6 is fixedly mounted on the base plate 3. A blow molding die 8 is provided between the moving template 5 and the fixed template 6, and an opening and closing die mechanism 04 is provided between the fixed template 6 and the rear template 7. During operation, the opening and closing die mechanism drives the rear template to move, and the rear template drives the moving template to open and close the die via the guide pillars.

[0021] Furthermore, four uprights 22 are provided on the base plate 3. The height of the four uprights 22 is higher than that of the moving template 5 and the fixed template 6. A fixing plate 17 is provided at the top of the four uprights 22. A square hole 18 is provided on the fixing plate 17. A motor fixing bracket 19 is provided below the square hole 18. A connecting plate 23 is provided on the fixing plate 17. A slide rail fixing bracket 20 is connected below the connecting plate.

[0022] Furthermore, the slide rail fixing bracket 20 is provided with a U-shaped groove 21, which cooperates with the guide post 4 to prevent the slide rail fixing bracket from interfering with the connection of the guide post.

[0023] Furthermore, the linear motion assembly includes a linear slide rail 11, a slider 12 slidably mounted on the linear slide rail 11, a moving plate 13 mounted on the slider 12, and the preform feeding and bottle-feeding robot 1 fixed on the moving plate 13. A rack 14 is mounted on the moving plate 13, and a motor 15 is mounted on the blow molding mechanism. The output shaft of the motor is connected to a gear 16, which meshes with the rack 14. During operation, the motor 15 drives the gear 16 to rotate, and the gear 16 meshes with the rack 14. The rack 14 then drives the slider 12 on the moving plate 13 to slide on the linear slide rail 11, achieving linear movement of the preform feeding and bottle-feeding robot 1 with high precision. The motor 15 can be a forward / reverse motor or a servo motor.

[0024] Furthermore, the linear slide rail 11 is fixed under the slide rail fixing bracket 20, and the motor 15 is fixed on the motor fixing bracket 19, making the linear slide rail and motor easy and reliable to install.

[0025] Furthermore, the preform conveying mechanism 06 includes an annular guide rail 25 and a transmission sprocket 26. A chain 27 is slidably mounted on the annular guide rail 25, and the chain 27 cooperates with the sprocket 26. The sprocket 26 is driven to rotate by a power source. A support seat 24 is mounted on the chain 27, and a plastic preform 05 is invertedly inserted into the support seat 24. During operation, the sprocket is driven to rotate by a power source, and the sprocket drives the chain to slide on the annular guide rail, thereby driving the plastic preform on the support seat to move within the heating device 08. The support seat is also equipped with a rotating shaft 28 and a rotating gear 29. The plastic preform 05 is invertedly inserted into the rotating shaft 28, and the rotating gear 29 cooperates with a small chain 30 to drive the rotating shaft to rotate, causing the plastic preform 05 to rotate within the heating device 08, resulting in uniform heating.

[0026] The above specific embodiments are used to explain and illustrate the present invention, but not to limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A blow molding machine for large-capacity plastic hollow containers, characterized in that... The device includes a preform conveying mechanism, a heating device, a stretch blow molding mechanism, and a preform flipping mechanism, all housed in a frame. The preform conveying mechanism has a support base on which plastic preforms are inverted and moved. The stretch blow molding mechanism has a preform feeding robot, driven by a linear motion component. The preform flipping mechanism has a flipping robot. A mold opening and preform removal synchronization mechanism is located between the stretch blow molding mechanism and the preform flipping mechanism. The stretch blow molding mechanism includes a moving template that opens and closes driven by a mold opening and closing mechanism. The mold opening and preform removal synchronization mechanism includes a preform removal bracket on the moving template, and a preform receiving plate on the bracket. When the mold is closed, the receiving plate cooperates with the flipping robot; when the mold is opened, the receiving plate cooperates with the preform feeding robot.

2. The blow molding machine for large-capacity plastic hollow containers as described in claim 1, characterized in that... The blow molding mechanism also includes a fixed template and a rear template. The moving template, the fixed template, and the rear template are connected by guide pillars. The moving template and the rear template are slidably mounted on the base plate, and the fixed template is fixedly mounted on the base plate. A blow molding die is provided between the moving template and the fixed template, and an opening and closing mold mechanism is provided between the fixed template and the rear template.

3. A blow molding machine for large-capacity plastic hollow containers as described in claim 2, characterized in that... Four uprights are installed on the base plate. The height of the four uprights is higher than that of the moving template and the fixed template. A fixing plate is installed at the top of the four uprights. A square hole is provided on the fixing plate. A motor fixing bracket is installed below the square hole. A connecting plate is provided on the fixing plate. A slide rail fixing bracket is connected below the connecting plate.

4. A blow molding machine for large-capacity plastic hollow containers as described in claim 3, characterized in that... The slide rail fixing frame is provided with a U-shaped groove, which cooperates with the guide post.

5. A blow molding machine for large-capacity plastic hollow containers as described in claim 1, characterized in that... The linear motion component includes a linear slide rail, a slider is slidably mounted on the linear slide rail, a moving plate is mounted on the slider, the preform feeding and bottle feeding robot is fixed on the moving plate, a rack is mounted on the moving plate, a motor is mounted on the blow molding mechanism, and the output shaft of the motor is connected to a gear, which meshes with the rack.

6. A blow molding machine for large-capacity plastic hollow containers as described in claim 5, characterized in that... The linear slide rail is fixed under the slide rail fixing frame, and the motor is fixed on the motor fixing frame.

7. A blow molding machine for large-capacity plastic hollow containers as described in claim 1, characterized in that... The preform conveying mechanism includes an annular guide rail and a transmission sprocket. A chain is slidably mounted on the annular guide rail. The chain cooperates with the sprocket, which is driven to rotate by a power source. A support seat is mounted on the chain, and a plastic preform is inserted upside down into the support seat.

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