Automatic blowing processing device for PET bottles

Abstract

The utility model discloses a kind of PET bottle automation blow molding processing device, belong to plastic processing equipment technical field, the device includes injection molding platform, first drive seat and second drive seat, first drive seat is moved horizontally on injection molding platform by screw rod and drive motor, second drive seat is vertically lifted on first drive seat by second cylinder, second drive seat bottom surface is equipped with first gas pipe and rotatable second gas pipe that coaxial sleeve is located in first gas pipe interior, gas bag is sleeved on the outer wall of first gas pipe, first gas pipe and second gas pipe are respectively provided with first air hole, second air hole, third air hole and fourth air hole that realize gas path switching. The utility model is highly integrated by blow molding and grabbing function, effectively solve the problems, such as complex equipment structure, high cost and low process conversion efficiency in prior art, significantly simplify the equipment structure, reduce production cost, and improve the automation production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of plastic processing equipment technology, and in particular to an automated blow molding device for PET bottles. Background Technology

[0002] PET plastic bottles are widely used in the beverage, food, and cosmetic industries due to their advantages such as light weight, high strength, and good transparency. The main production method is blow molding, which involves placing a heated and softened PET preform into a mold, then introducing compressed air to inflate it and allow it to conform to the inner wall of the mold. After cooling, the desired shape of the plastic bottle is formed.

[0003] In modern large-scale production, the blow molding process of PET bottles is typically automated to improve efficiency and product consistency. On existing automated production lines, blow molding and finished product removal are usually performed by two separate systems. Specifically, after the blow molding mechanism completes the blow molding of the preform and the mold opens, a dedicated finished product removal mechanism, such as a robotic arm or special clamp, is needed to enter the mold area, grab and remove the molded plastic bottle.

[0004] However, this design, which separates the blow molding function from the finished product removal function, makes the structure of the entire automated device more complex. The independent removal mechanism not only occupies additional physical space but also increases the manufacturing cost and maintenance difficulty. More importantly, the blow molding cycle and the removal cycle are two independent actions requiring precise timing coordination, which to some extent limits the improvement of the overall production cycle time and increases the complexity of the control system.

[0005] Therefore, this utility model proposes an automated blow molding device for PET bottles to address the shortcomings of existing technologies. Utility Model Content

[0006] To overcome the above shortcomings, this utility model provides an automated blow molding device for PET bottles, aiming to improve the problems of complex structure, high production cost, and limited process conversion efficiency in the automated process of automated blow molding devices for PET bottles. This utility model aims to provide an automated blow molding device for PET bottles with an improved structure that can effectively solve the above problems.

[0007] To achieve the above objectives, this utility model provides the following technical solution: an automated blow molding device for PET bottles, comprising: an injection table, an injection mold, a first drive seat, a lead screw, a drive motor, a second drive seat, a second cylinder; and a first air pipe, a second air pipe, an air bag, a first air hole, a third air hole, a second air hole, a fourth air hole, a first cylinder, a drive rod, and a linkage rod.

[0008] The second trachea is coaxially sleeved inside the first trachea and can rotate relative to the first trachea. An air bladder is sleeved on the outer wall of the first trachea. The first trachea and the second trachea are respectively provided with a first air hole, a second air hole, a third air hole and a fourth air hole for switching air paths.

[0009] The first drive seat is disposed on the top surface of the injection molding table by means of a lead screw thread connection. The second drive seat is fixedly connected to the top surface of the first drive seat by the second cylinder. The first air pipe is installed on the bottom surface of the second drive seat. The first cylinder is fixedly connected to the outer wall of the second air pipe by a drive rod fixed at its telescopic end and a linkage rod rotatably connected thereto, so as to drive the second air pipe to rotate.

[0010] Preferably, the automated blow molding device for PET bottles further includes a connecting sleeve, a telescopic sleeve, a sealing head, and a spring. The connecting sleeve is fixed to the bottom surface of the second drive seat, the telescopic sleeve is slidably fitted inside the connecting sleeve, the sealing head is fixed to the bottom end of the telescopic sleeve, and the spring is installed between the sealing head and the connecting sleeve.

[0011] Preferably, the automated blow molding device for PET bottles further includes an air pump, which is installed on the top surface of the second drive seat and connected to the second air pipe via a splitter pipe.

[0012] Preferably, the automated blow molding device for PET bottles further includes a third cylinder, which is installed on one side of the injection molding table, and the telescopic shaft of the third cylinder is fixedly connected to one side of the injection mold.

[0013] Preferably, the drive rod is a long rod structure, the number of the linkage rods corresponds to the number of the second air tubes, and a plurality of the linkage rods are connected at intervals along the length direction of the drive rod.

[0014] Preferably, the action of the first cylinder causes the second air pipe to rotate and switch between a first position and a second position; when the second air pipe is in the first position, the third air port and the fourth air port are aligned and connected; when the second air pipe is in the second position, the first air port and the second air port are aligned and connected, and the third air port and the fourth air port are misaligned.

[0015] Preferably, the automated blow molding apparatus for PET bottles further includes a conveyor, which is disposed on one side of the injection molding table.

[0016] This utility model has the following beneficial effects: 1. In this utility model, by setting up an inner and outer double-layer air pipe structure and using a cylinder to drive the inner air pipe to rotate to switch the air path, the blow molding function and the finished product gripping function are integrated into the same component. The product is clamped and released by the expansion and contraction of the air bladder. This solves the problem that the blow molding device and the finished product removal device are independent of each other in the prior art, resulting in a complex overall structure, high cost and low production efficiency. It achieves the technical effect of simplifying the equipment structure, reducing production costs, and improving the degree of automation and production efficiency.

[0017] 2. This utility model, by using a motor-driven lead screw to control the horizontal movement of the blow molding head and a cylinder to drive the vertical lifting of the blow molding head, combined with an automatically opening and closing injection mold, solves the problems of low positioning accuracy, excessive manual intervention, and unsmooth process connection in traditional equipment. It achieves fully automated operation of the entire blow molding, part picking, and conveying process, with precise and reliable actions, stable product quality, and a significant reduction in the labor intensity of workers. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of an automated blow molding device for PET bottles proposed in this utility model; Figure 2 This is a schematic diagram of the drive motor of an automated blow molding device for PET bottles proposed in this utility model; Figure 3 This is a schematic diagram of the structure of the second cylinder of an automated blow molding device for PET bottles proposed in this utility model; Figure 4 This is a schematic diagram of the linkage rod of an automated blow molding device for PET bottles proposed in this utility model; Figure 5 This is a schematic diagram of the internal structure of the connecting sleeve of an automated blow molding device for PET bottles proposed in this utility model; Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0019] Legend: 1. Conveyor; 101. Injection molding table; 2. First drive seat; 201. Second drive seat; 202. Air pump; 203. Connecting sleeve; 204. Telescopic sleeve; 205. Airbag; 206. First air pipe; 207. Second air pipe; 208. First air hole; 209. Second air hole; 210. Third air hole; 211. Fourth air hole; 212. Spring; 213. Sealing head; 3. Linkage rod; 301. Drive rod; 302. First cylinder; 303. Second cylinder; 304. Third cylinder; 305. Injection mold; 4. Lead screw; 401. Drive motor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please refer to Figures 1 to 6 This utility model provides an automated blow molding device for PET bottles, which aims to solve the problem that existing PET bottle blow molding devices usually require independent blow molding mechanisms and finished product removal mechanisms, resulting in complex overall structure, high cost and limited process conversion efficiency.

[0022] An automated blow molding device for PET bottles includes an injection molding table 101 and a first drive seat 2 threadedly connected to the top surface of the injection molding table 101 via a lead screw 4. A drive motor 401 is fixedly connected to one side of the top surface of the injection molding table 101, and the lead screw 4 is connected to the output shaft of the drive motor 401. The first drive seat 2 is threadedly connected to the outer wall of the lead screw 4. The drive motor 401 drives the lead screw 4 to rotate, thereby causing the first drive seat 2 to reciprocate horizontally along the axial direction of the lead screw 4. The injection molding table 101 serves as the entire unit. The mounting base of the device has an injection mold 305 inside the injection molding table 101. A second cylinder 303 is fixedly connected to the top surface of the first drive seat 201. The telescopic shaft of the second cylinder 303 is fixedly connected to the top surface of the second drive seat 201. The second cylinder 303 is used to drive the second drive seat 201 to move vertically up and down relative to the first drive seat 201. A first air pipe 206 is installed on the bottom surface of the second drive seat 201, and a device is coaxially sleeved inside the first air pipe 206 and can rotate relative to the first air pipe 206. The second air pipe 207 is movable. An air bladder 205 is fitted onto the outer wall of the first air pipe 206. A first air hole 208 is formed on the outer wall of the first air pipe 206, and a third air hole 210 is formed on the bottom surface of the first air pipe 206. A second air hole 209 is formed on the outer wall of the second air pipe 207, and a fourth air hole 211 is formed on the bottom surface of the second drive seat 201. A first cylinder 302 is rotatably connected to the bottom surface of the second drive seat 201. A drive rod 301 is fixed to the telescopic end of the first cylinder 302. One end of the drive rod 301... A linkage rod 3 is rotatably connected to the side, and the other end of the linkage rod 3 is fixedly connected to the outer wall of the second air pipe 207. The first cylinder 302 drives the drive rod 301 to move. The drive rod 301 drives the second air pipe 207 to rotate relative to the first air pipe 206 via the linkage rod 3. The rotation of the second air pipe 207 realizes the alignment or misalignment switching between the first air hole 208 and the second air hole 209, and between the third air hole 210 and the fourth air hole 211, thereby controlling whether the gas is used to inflate the air bag 205 or to blow-mold the preform.

[0023] Several connecting sleeves 203 are fixedly connected to the bottom surface of the second drive seat 201. The connecting sleeve 203 has a cavity inside and a telescopic sleeve 204 is slidably fitted on it. A sealing head 213 is fixedly connected to the bottom end of the telescopic sleeve 204, and a spring 212 is installed between the sealing head 213 and the connecting sleeve 203. The upper end of the spring 212 abuts against the connecting sleeve 203 and the lower end abuts against the sealing head 213. This design ensures that when the second drive seat 201 moves down, the sealing head 213 can flexibly abut against the bottle mouth of the PET raw material bottle. The compression action of the spring 212 achieves a reliable seal on the bottle mouth, providing a sealed environment for the subsequent blow molding process. At the same time, the flexible abutment of the sealing head 213 can adapt to small deviations in the size of the bottle mouth, ensuring the sealing and stability of the blow molding process.

[0024] Meanwhile, an air pump 202 is installed on the top surface of the second drive seat 201, and the air pump 202 is connected to the second air pipe 207 through a diverter pipe. As a gas source, the air pump 202 provides the required high-pressure gas to the entire blow molding system. Through the design of the diverter pipe, the airflow can be precisely guided to the inside of the second air pipe 207, thereby supplying air to the air bag 205 or the inside of the raw material bottle when needed to achieve the functions of expansion and blow molding.

[0025] In a preferred embodiment, in order to realize the automatic opening and closing of the injection mold 305, a third cylinder 304 is installed on one side of the inside of the injection table 101. The telescopic shaft of the third cylinder 304 is fixedly connected to one side of the injection mold 305. By controlling the reciprocating motion of the telescopic shaft of the third cylinder 304, the injection mold 305 can be driven to complete the closing and opening actions.

[0026] As a preferred embodiment, in order to achieve simultaneous control of multiple blow molding heads, the drive rod 301 is a long rod structure, the number of linkage rods 3 corresponds to the number of second air pipes 207, and the plurality of linkage rods 3 are rotated and connected at intervals along the length direction of the drive rod 301. This structure enables the first cylinder 302 to drive all linkage rods 3 synchronously in one action, thereby driving all second air pipes 207 to rotate synchronously, which is suitable for mass production scenarios of multi-cavity molds.

[0027] The action of the first cylinder 302 causes the second air pipe 207 to rotate and switch between the first position and the second position. When the second air pipe 207 is in the first position, the fourth air hole 211 on the bottom surface of the second air pipe 207 is aligned and connected with the third air hole 210 on the bottom surface of the first air pipe 206, forming a channel for inflating or deflating the air bag 205. When the second air pipe 207 rotates to the second position, the second air hole 209 on the outer wall of the second air pipe 207 is aligned and connected with the first air hole 208 on the outer wall of the first air pipe 206, forming a channel for blow molding into the preform. At this time, the third air hole 210 and the fourth air hole 211 are misaligned, cutting off the connection with the air bag 205.

[0028] In a preferred embodiment, in order to realize the automatic conveying of the finished product after blow molding, a conveyor 1 is also provided on one side of the injection molding table 101. The first drive seat 2 can be moved above the conveyor 1 to release the blow-molded PET bottle onto the conveyor 1, which will then convey it to the subsequent work station.

[0029] Working principle: When blow molding of PET plastic bottles is required, the third cylinder 304 inside the injection molding table 101 is activated, driving the injection mold 305 to close. The raw material bottle is then placed into the injection mold 305; Next, the drive motor 401 on the top surface of the injection molding table 101 starts, driving the lead screw 4 to rotate. The first drive seat 2 moves horizontally along the threaded connection of the lead screw 4 and stops accurately above the injection mold 305. Subsequently, the second cylinder 303 on the top surface of the first drive seat 2 starts, driving the second drive seat 201 to move vertically downward, so that the first air pipe 206 and the air bag 205 enter the inside of the raw material bottle. At the same time, the sealing head 213 on the bottom surface of the second drive seat 201 flexibly abuts against the bottle mouth of the raw material bottle through the compression action of the telescopic sleeve 204 and the spring 212 inside the connecting sleeve 203, thus completing a reliable seal. At this time, the air pump 202 on the top surface of the second drive seat 201 is started, and gas is introduced into the second air pipe 207 through the diversion pipe. The gas enters the air bladder 205 through the third air hole 210 on the bottom surface of the first air pipe 206 and the fourth air hole 211 on the bottom surface of the second air pipe 207, causing the air bladder 205 to inflate, thereby achieving pre-opening and clamping of the raw material bottle. Next, the first cylinder 302 rotatably connected to the bottom surface of the second drive seat 201 is started, pushing its telescopic end. The drive rod 301 drives the second air tube 207 to rotate via the linkage rod 3. This rotation causes the third air hole 210 and the fourth air hole 211 to misalign, cutting off the air supply path to the airbag 205. At the same time, it makes the second air hole 209 on the outer wall of the second air tube 207 and the first air hole 208 on the outer wall of the first air tube 206 aligned and connected. High-pressure gas is directly blown into the inside of the raw material bottle to blow mold the raw material bottle, causing it to expand and fit the inner wall of the injection mold 305. After blow molding is completed, the injection mold 305 opens, and the second cylinder 303 drives the second drive seat 201 to move upward. Since the air bag 205 remains inflated, its clamping force or friction pulls the blow-molded plastic bottle out of the injection mold 305. Subsequently, the drive motor 401 starts again, driving the first drive seat 2 to move horizontally, moving the blow molding head carrying the finished product to the conveyor 1 on one side of the injection table 101. Finally, the first cylinder 302 actuates again, driving the second air pipe 207 to rotate, so that the third air hole 210 and the fourth air hole 211 are re-aligned and connected. This connection opens the exhaust passage of the air bag 205, and the gas inside the air bag 205 is quickly released and contracted. The plastic bottle, due to the loss of clamping, falls off under the action of gravity and falls accurately onto the conveyor 1, which then transports the finished product away, completing a complete automated blow molding cycle.

Claims

1. An automated blow molding apparatus for PET bottles, comprising: Injection molding station (101) and injection mold (305) disposed inside the injection molding station (101); The first drive seat (2) is set on the top surface of the injection table (101) by means of threaded connection of the lead screw (4). A drive motor (401) for driving the lead screw (4) to rotate is fixedly connected to one side of the top surface of the injection table (101). The second drive seat (201) has its top surface fixedly connected to the top surface of the first drive seat (2) via a second cylinder (303). The second drive seat (201) is characterized in that... The bottom surface of the second drive seat (201) is equipped with a first air pipe (206) and a second air pipe (207) coaxially sleeved inside the first air pipe (206) and rotatable relative to the first air pipe (206). An air bag (205) is sleeved on the outer wall of the first air pipe (206). The outer wall of the first trachea (206) is provided with a first air hole (208) and the bottom surface is provided with a third air hole (210). The outer wall of the second trachea (207) is provided with a second air hole (209) and the bottom surface is provided with a fourth air hole (211). The bottom surface of the second drive seat (201) is also rotatably connected to the first cylinder (302). The extension end of the first cylinder (302) is fixed with a drive rod (301). One side of the drive rod (301) is rotatably connected to a linkage rod (3), and the other end of the linkage rod (3) is fixedly connected to the outer wall of the second air pipe (207).

2. The automated blow molding device for PET bottles according to claim 1, characterized in that, The bottom surface of the second drive seat (201) is also fixed with a connecting sleeve (203), and the inner sliding sleeve of the connecting sleeve (203) is provided with a telescopic sleeve (204).

3. The automated blow molding device for PET bottles according to claim 2, characterized in that, A sealing head (213) is fixed at the bottom end of the telescopic sleeve (204), and a spring (212) is installed between the sealing head (213) and the connecting sleeve (203).

4. The automated blow molding device for PET bottles according to claim 1, characterized in that, An air pump (202) is mounted on the top surface of the second drive seat (201), and the air pump (202) is connected to the second air pipe (207) via a split pipe.

5. The automated blow molding device for PET bottles according to claim 1, characterized in that, A third cylinder (304) is installed on one side of the inside of the injection molding station (101), and the telescopic shaft of the third cylinder (304) is fixedly connected to one side of the injection mold (305).

6. The automated blow molding device for PET bottles according to claim 1, characterized in that, The drive rod (301) is a long rod structure, the number of the linkage rods (3) corresponds to the number of the second air tubes (207), and a plurality of the linkage rods (3) are connected at intervals along the length direction of the drive rod (301).

7. The automated blow molding device for PET bottles according to claim 1, characterized in that, The action of the first cylinder (302) causes the second air pipe (207) to rotate and switch between the first position and the second position; when the second air pipe (207) is in the first position, the third air hole (210) and the fourth air hole (211) are aligned and connected; when the second air pipe (207) is in the second position, the first air hole (208) and the second air hole (209) are aligned and connected, and the third air hole (210) and the fourth air hole (211) are misaligned.

8. The automated blow molding device for PET bottles according to claim 1, characterized in that, A conveyor (1) is also provided on one side of the injection molding station (101).

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