Horizontal cutting device for upper nozzle of plastic bottle
By designing a horizontal cutting device for plastic bottle water outlets including conveyor belt, limit baffle, transmission belt and jet nozzle, the problem of low cutting accuracy in the prior art is solved, and higher cutting is achieved Accuracy and lower defect rate, suitable for high-quality blow molding processes.
Patent Information
- Application Number
- CN202420513933.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-15
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-03-15
AI Technical Summary
The existing water-loading cutting method has low cutting accuracy in blow molding processing, which is prone to scratching the bottle body and uneven cutting position, and is especially suitable for high-quality blow molding processes.
A horizontal cutting device for water outlet of plastic bottle is designed, including a frame, a rotary connected conveyor belt, a limit baffle, a transmission belt, a gas storage box, a jet nozzle and a cutting knife, and the air flow and positioning projection through the jet nozzle The role of the workpiece is to realize the semi-contact positioning and precise cutting.
It improves the cutting accuracy of the water supply port, reduces the generation of defective products, reduces the high-diameter ratio of the workpiece, and ensures the reliability of the cutting position. It is suitable for high-quality blow molding processes.
Smart Images
Figure CN222495362U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of blow molding processing and relates to a horizontal cutting device for a water inlet of a plastic bottle. Background Art
[0002] In the blow molding process of plastic containers, the extruder first extrude a semi-molten tube billet. When the tube billet reaches a certain length, the mold moves to the head position to close the bottom of the tube billet and hold the tube billet. The circular cutter cuts the tube billet into sections. Then the mold moves to the blow molding station, and the blow rod enters the tube billet to inflate the inside, causing the tube billet to expand until it is close to the inner wall of the mold and formed, thereby forming a semi-finished product with an upper water inlet and a lower water inlet. The lower water inlet is often separated from the bottle body by breaking it off, while the upper water inlet needs to be cut online after the mold is opened. Among the existing upper water inlet cutting methods, a common method is to put the bottle body online and control the bottle body to rotate during the translation process, so that the bottle body contacts the cutter set in the moving path and the upper water inlet is cut off.
[0003] The cutting method of the nozzle in the blow molding process has low cutting accuracy, and may even scratch the bottle body. The cutting position is also uneven. This is because in the process of controlling the translation of the workpiece on the conveyor belt, the small belt located on one side of the conveyor belt is used to drive the workpiece to rotate. The linear speed of the small belt is different from that of the conveyor belt, which enables the workpiece to slowly rotate during the translation on the conveyor belt, and completes the ring cutting of the nozzle in the process of contacting the blade on the side of the conveyor belt. It is not difficult to see from the above nozzle cutting process that the position of the ring cutting knife is fixed. Only when the workpiece is completely pressed against the conveyor belt and maintained in a vertical state, the cutting position is accurate. If the workpiece is tilted, "off the ground" and stuck to each other during the movement and rotation process, the cutting position and cutting effect of the set position cannot be achieved. Especially for thin-walled and lightweight plastic bottles and plastic bottles with a large height-to-diameter ratio, the probability of defective products in the cutting process will increase significantly. The existence of the upper nozzle substantially increases the height-to-diameter ratio of the uncut upper nozzle workpiece, and the irregularity of the upper nozzle also affects the stability of the workpiece's online movement. Therefore, the existing upper nozzle cutting method is not suitable for high-quality blow molding technology. Utility Model Content
[0004] The purpose of the utility model is to provide a horizontal cutting device for a plastic bottle nozzle in order to solve the above problems in the prior art. The technical problem to be solved by the utility model is how to improve the cutting accuracy of the nozzle.
[0005] The purpose of the utility model can be achieved through the following technical solutions: a horizontal cutting device for a plastic bottle nozzle, characterized in that it includes a frame and a conveyor belt rotatably connected to the frame, a limit baffle and a first transmission belt are arranged on one side of the conveyor belt, the limit baffle is located in front of the first transmission belt, a primary cutting knife is fixedly arranged on the outer side of the limit baffle, a second transmission belt is arranged on the other side of the conveyor belt, an air storage box fixed on the frame is arranged between the two straight sections of the first transmission belt, the side opening of the air storage box is parallel to the straight section on the inner side of the first transmission belt, a plurality of air nozzles are arranged alternately on the first transmission belt, the air inlet end of the air nozzle located on the inner side of the first transmission belt is connected to the air storage box, the air storage box is connected to a positive pressure air source, a plurality of partitions are arranged on the conveyor belt, the spacing between adjacent partitions is equal to the spacing between adjacent air nozzles, the linear speed of the conveyor belt, the linear speed of the first transmission belt and the linear speed of the second transmission belt are all equal; a secondary cutting knife is arranged on the top of the air storage box; a compression belt located above the conveyor belt is arranged on the frame.
[0006] Furthermore, a plurality of positioning protrusions are alternately arranged on the second transmission belt, and the spacing between adjacent positioning protrusions is equal to the spacing between adjacent air nozzles.
[0007] Furthermore, the partition is provided with an escape opening for avoiding the air jet nozzle.
[0008] The workpiece with the upper water outlet to be cut is fed into the conveyor belt entrance in a lying state. When the first cutting is performed, the baffle acts as a limiter at the contraction position close to one end of the bottle mouth. When the bottle body is limited by the adjacent partition, the first cutting knife cuts off the upper part of the upper water outlet, and a small part is reserved on the bottle body. This approach can not only avoid the situation that the cutting method of the first cutting station that fails to accurately position the workpiece forms defective products due to cutting accuracy problems, but also reduce the height-to-diameter ratio of the workpiece. Subsequently, it enters between the first transmission belt and the second transmission belt. While being limited by the first transmission belt and the second transmission belt, the air nozzle is inserted into the bottle mouth, the positioning protrusion acts on the bottom of the bottle body, and the air nozzle inflates the inner cavity of the bottle body so that the bottle body is pressed against the positioning protrusion to ensure its reliable cutting position. Under the action of the unpowered pressing belt, the bottle body can rotate during the movement, and the secondary cutting knife can complete the circular cutting of the remaining part of the upper water outlet; after the cutting is completed, the material is unloaded from the end of the conveyor belt, and this process is repeated.
[0009] It is not difficult to see from the description of the above working process that the wrapping positioning and moving position of the workpiece are accurate, and the airflow and positioning block are used to enable the workpiece to be semi-contact positioned. The airflow can also be used as a blanking material after cutting is completed.
[0010] The water inlet is left when the inflation needle is inserted during blow molding. Its entrance is very small. If it is not cut once, it will not only be irregular but also impossible to position for blowing. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Figure 1 It is a structural schematic diagram of a horizontal cutting device for a plastic bottle nozzle.
[0012] Figure 2 It is an exploded view of the conveyor belt, the first transmission belt and the second transmission belt.
[0013] Figure 3 It is a schematic diagram of the structure of the air storage box opening and the first transmission belt.
[0014] Figure 4 yes Figure 1 Enlarged view of part A in the figure.
[0015] Figure 5 It is a schematic diagram of three states on the conveyor belt during the water inlet cutting process.
[0016] In the figure, 1, frame; 2, conveyor belt; 3, first transmission belt; 4, primary cutting knife; 5, second transmission belt; 6, air storage box; 7, air nozzle; 8, partition; 9, clamping belt; 10, positioning protrusion; 11, avoidance; 12, secondary cutting knife; 13, baffle. DETAILED DESCRIPTION
[0017] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.
[0018] like Figure 1-Figure 5 The plastic bottle upper nozzle horizontal cutting device shown in the figure comprises a frame 1 and a conveyor belt 2 rotatably connected to the frame 1, a limit baffle 13 and a first transmission belt 3 are arranged on one side of the conveyor belt 2, the limit baffle 13 is located in front of the first transmission belt 3, a primary cutting knife 4 is fixedly arranged on the outer side of the limit baffle 13, a second transmission belt 5 is arranged on the other side of the conveyor belt 2, an air storage box 6 fixed on the frame 1 is arranged between two straight sections of the first transmission belt 3, and the air storage box 6 is parallel to the straight section on the inner side of the first transmission belt 3. The conveyor belt 2 is open, and a plurality of air nozzles 7 are alternately arranged on the first transmission belt 3. The air inlet end of the air nozzle 7 located on the inner side of the first transmission belt 3 is connected to the air storage box 6, and the air storage box 6 is connected to the positive pressure air source. A plurality of partitions 8 are arranged on the conveyor belt 2, and the distance between adjacent partitions 8 is equal to the distance between adjacent air nozzles 7. The linear speed of the conveyor belt 2, the linear speed of the first transmission belt 3 and the linear speed of the second transmission belt 5 are all equal; a secondary cutting knife 12 is arranged on the top of the air storage box 6; a compression belt 9 located above the conveyor belt 2 is arranged on the frame 1.
[0019] A plurality of positioning protrusions 10 are arranged alternately on the second transmission belt 5 , and the spacing between adjacent positioning protrusions 10 is equal to the spacing between adjacent air nozzles 7 .
[0020] The partition plate 8 has an escape opening 11 for escaping the air nozzle 7 .
[0021] The workpiece to be cut with the water outlet is fed into the conveyor belt 2 in a lying state from the entrance. When the first cutting is performed, the baffle 13 is used as a limiter at the contraction position close to one end of the bottle mouth. When the bottle body is limited by the adjacent partition 8, the first cutting knife 4 cuts off the upper part of the water outlet, and a small part is reserved on the bottle body. This practice can not only avoid the situation that the first cutting station, which fails to accurately position the workpiece, forms defective products due to cutting accuracy problems, but also can reduce the height-to-diameter ratio of the workpiece. Subsequently, the first transmission is entered. Between the belt 3 and the second transmission belt 5, the air nozzle 7 is inserted into the bottle mouth while being limited by the first transmission belt 3 and the second transmission belt 5, and the positioning protrusion 10 acts on the bottom of the bottle body. The air nozzle 7 inflates the inner cavity of the bottle body so that the bottle body is pressed against the positioning protrusion 10 to ensure its reliable cutting position. Under the action of the unpowered pressing belt 9, the bottle body can rotate during the movement, and the secondary cutting knife 12 can complete the circular cutting of the residual part of the upper water inlet; after the cutting is completed, the material is unloaded from the end of the conveyor belt 2, and this process is repeated.
[0022] It is not difficult to see from the description of the above working process that the wrapping positioning and moving position of the workpiece are accurate, and the airflow and positioning block are used to enable the workpiece to be semi-contact positioned. The airflow can also be used as a blanking material after cutting is completed.
[0023] The water inlet is left when the inflation needle is inserted during blow molding. Its entrance is very small. If it is not cut once, it will not only be irregular but also impossible to position for blowing.
[0024] It should be noted that the opening of the air storage box 6 is sealed and connected to the first transmission belt 3. A rubber roller is provided at the opening of the air storage box 6. The rubber roller serves as a contact piece between the side wall of the air storage box 6 and the first transmission belt 3, thereby achieving better sealing and better movement smoothness of the first transmission belt 3.
[0025] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.
Claims
1. A horizontal cutting device for a plastic bottle nozzle, characterized in that: The invention comprises a frame (1) and a conveyor belt (2) rotatably connected to the frame (1); a limit baffle (13) and a first transmission belt (3) are arranged on one side of the conveyor belt (2); the limit baffle (13) is located in front of the first transmission belt (3); a primary cutting knife (4) is fixedly arranged on the outer side of the limit baffle (13); a second transmission belt (5) is arranged on the other side of the conveyor belt (2); an air storage box (6) fixed to the frame (1) is arranged between two straight sections of the first transmission belt (3); the air storage box (6) has a side opening parallel to the straight section on the inner side of the first transmission belt (3); and the first A plurality of air nozzles (7) are arranged alternately on the transmission belt (3); the air inlet end of the air nozzle (7) located on the inner side of the first transmission belt (3) is connected to an air storage box (6); the air storage box (6) is connected to a positive pressure air source; a plurality of partitions (8) are arranged on the conveyor belt (2); the spacing between adjacent partitions (8) is equal to the spacing between adjacent air nozzles (7); the linear speed of the conveyor belt (2), the linear speed of the first transmission belt (3) and the linear speed of the second transmission belt (5) are all equal; a secondary cutting knife (12) is arranged on the top of the air storage box (6); and a compression belt (9) located above the conveyor belt (2) is arranged on the frame (1).
2. According to claim 1, a horizontal cutting device for a plastic bottle nozzle, characterized in that: A plurality of positioning protrusions (10) are arranged alternately on the second transmission belt (5), and the spacing between adjacent positioning protrusions (10) is equal to the spacing between adjacent air nozzles (7).
3. A horizontal cutting device for a plastic bottle nozzle according to claim 1, characterized in that: The partition plate (8) is provided with an escape opening (11) for evading the air jet nozzle (7).