Automatic collection and compression integrated device for film crushing edge material

Abstract

The utility model provides a kind of automatic collection compression integrated device of film crushing edge material, it is related to polyimide production equipment technical field, the automatic collection compression integrated device includes feed air pipe, controller and at least two compression box, feed air pipe includes feed main pipe and at least two feed branch pipes, switching mechanism is provided on feed main pipe for controlling the communication and cut-off of each feed branch pipe;Each compression box has compression cavity, each compression box is equipped with feed inlet and discharge outlet, feed branch pipe is communicated with compression cavity by feed inlet;Compression mechanism and discharge mechanism are provided in each compression box, compression mechanism is used to compress the film crushing edge material in compression cavity, discharge mechanism is used to push out from compression cavity after the edge material block of compression from discharge outlet;Controller is electrically connected with switching mechanism, compression mechanism and discharge mechanism respectively.The automatic collection compression integrated device realizes the collection and compression to the crushing edge material generated in the process of film production.

Description

Technical Field

[0001] This utility model relates to the technical field of polyimide production equipment, and in particular to an integrated automatic collection and compression device for film crushing edge material. Background Technology

[0002] In the production of polyimide film, the film edge material is pierced by needles to pull the film for processing. The film edge material pierced by the needles has multiple holes and cannot be used as a qualified product. Therefore, the film needs to be cut to remove the perforated film edge material to form a qualified product without holes. The cut film edge material also needs to be crushed, collected and reused.

[0003] In existing technologies, the shredded film scrap (i.e., film shredded scrap) is typically discharged by a blower and collected into woven bags, which are then manually packaged once full. The area of ​​a single piece of film shredded scrap is 3-10 square centimeters. Due to the fluffy nature of the scrap, the woven bags after collection are quite large, typically 1.7-2 m³. These large bags result in low transportation efficiency and require significant storage space. If the packaged film shredded scrap is then placed in a compression baler and manually compressed, it not only increases the workload but also poses significant safety risks.

[0004] In view of this, based on years of experience in production design in this and related fields, the applicant has designed an integrated automatic collection and compression device for film crushing edge material through repeated experiments, in order to solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this invention is to provide an integrated automatic collection and compression device for film shredded edge material, which can collect and compress the shredded edge material generated during the film production process, reduce the volume of the collected material, and solve the problems of inconvenient material handling, large storage space requirements, and low vehicle transportation efficiency.

[0006] To achieve the above objectives, this utility model proposes an integrated automatic collection and compression device for film pulverization edge material, wherein the integrated automatic collection and compression device comprises: The feed duct includes a main feed pipe and at least two feed branch pipes connected in parallel to the main feed pipe. The main feed pipe is provided with a switching mechanism, which is used to control the connection and disconnection between the main feed pipe and each of the feed branch pipes. At least two compression chambers are provided, each compression chamber having a compression cavity, each compression chamber having an inlet and an outlet, and the inlet branch pipe communicating with the compression cavity through the inlet; each compression chamber is provided with a compression mechanism and an outlet mechanism, the compression mechanism being used to compress the film pulverized edge material in the compression cavity, and the outlet mechanism being used to push the compressed edge material block out of the compression cavity through the outlet; The controller is electrically connected to the switching mechanism, the compression mechanism, and the discharge mechanism respectively, and controls the operation of the switching mechanism, the compression mechanism, and the discharge mechanism.

[0007] The automatic collection and compression integrated device for film pulverization edge material as described above, wherein the switching mechanism includes a switching air valve and an air valve actuator that is kinetically connected to the switching air valve, and the air valve actuator is electrically connected to the controller.

[0008] The automatic collection and compression device for film pulverized edge material as described above includes a compression mechanism comprising a vertical drive component and a pressure plate. The vertical drive component is located above the compression chamber and is electrically connected to the controller. The piston rod of the compression mechanism vertically penetrates the top plate of the compression chamber and extends into the compression cavity. The pressure plate is fixedly connected to the end of the piston rod and moves up and down under the drive of the piston rod.

[0009] As described above, the automatic collection and compression integrated device for film pulverization edge material includes a vertically extending guide rail on the inner wall of the compression chamber, a guide rail slider fixed to the side of the pressure plate, and the guide rail slider slidingly engaging with the guide rail.

[0010] As described above, the automatic collection and compression integrated device for film pulverization edge material includes a guide groove on the guide rail slider and a strip-shaped protrusion on the guide rail that aligns with the guide groove, the strip-shaped protrusion being arranged along the length direction of the guide rail.

[0011] As described above, the automatic collection and compression integrated device for film pulverization edge material includes a plurality of guide wheels on the strip-shaped protrusion. The guide wheels are spaced apart along the length direction of the strip-shaped protrusion, and the rotation axis of each guide wheel is perpendicular to the length direction of the strip-shaped protrusion. Each guide wheel rolls into contact with the bottom surface of the guide groove.

[0012] As described above, the automatic collection and compression integrated device for film pulverization edge material has limiting grooves respectively opened on both sides of the strip-shaped protrusion. The two limiting grooves are symmetrically arranged, and each limiting groove is opened along the length direction of the strip-shaped protrusion. The two opposite groove walls of the guide groove are provided with limiting protrusions that are aligned and cooperate with the limiting grooves. The limiting protrusions and the limiting grooves are in sliding cooperation.

[0013] The automatic collection and compression integrated device for film pulverization edge material as described above, wherein the discharge port is located at the lower part of the side wall of the compression chamber, and the discharge mechanism includes: A door panel opening and closing mechanism is used to open or close the discharge port; An ejection mechanism is located on the side of the compression chamber opposite to the discharge port. The ejection mechanism ejects the compressed film shredded edge material through the opened discharge port.

[0014] The automatic collection and compression device for film shredded edge material as described above, wherein the door opening and closing mechanism includes: A door panel is installed at the discharge port in a way that allows it to be opened and closed; An opening / closing actuator is connected to the door panel and drives the door panel to open and close. The opening / closing actuator is electrically connected to the controller.

[0015] The automatic collection and compression device for film shredded edge material as described above, wherein the ejection mechanism includes: A horizontal drive component is located outside the compression chamber and electrically connected to the controller. The piston rod of the horizontal drive component horizontally penetrates the side wall of the compression chamber and extends into the compression cavity. A push plate is fixedly connected to the end of the piston rod and moves closer to or further away from the discharge port under the drive of the piston rod.

[0016] Compared with the prior art, the present invention has the following features and advantages: The present invention proposes an integrated automatic collection and compression device for film shredded material. A controller, through a switching mechanism, controls the film shredded material to alternately enter different compression chambers. While one compression chamber is collecting material, the other chamber can simultaneously perform compression and discharge operations, avoiding production line downtime due to compression and discharge. This achieves continuous automated operation of film shredded material collection and compression, significantly improving processing efficiency. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of this invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, under the guidance of this invention, can select various possible shapes and proportions to implement this invention according to specific circumstances.

[0018] Figure 1 This is a schematic diagram of the automatic collection and compression integrated device proposed in this utility model; Figure 2 This is a schematic diagram of the compression box in this utility model; Figure 3 This is a schematic diagram showing the cooperation between the guide rail and the guide rail slider in this utility model; Figure 4 This is a schematic diagram of the guide rail structure in this utility model; Figure 5 This is a schematic diagram of the guide rail slider in this utility model; Figure 6 This is a control logic diagram of an embodiment of the present invention.

[0019] Explanation of reference numerals in the attached figures

[0020] 100. Automatic collection and compression integrated device; 10. Feed duct; 11. Main feed pipe; 12. Branch feed pipe; 13. Switching mechanism; 131. Switching air valve; 132. Air valve actuator; 20. Compression box; 21. Compression chamber; 22. Feed inlet; 23. Discharge outlet; 30. Compression mechanism; 31. Vertical drive component; 32. Pressure plate; 33. Guide rail; 331. Strip protrusion; 332. Guide wheel; 333. Limiting groove; 34. Guide rail slider; 341. Guide groove; 342. Limiting protrusion; 40. Door opening and closing mechanism; 41. Door panel; 42. Opening and closing actuator; 50. Pushing mechanism; 51. Horizontal drive component; 52. Push plate. Detailed Implementation

[0021] The details of this utility model can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of this utility model described herein are for illustrative purposes only and should not be construed as limiting the utility model in any way. Under the teachings of this utility model, those skilled in the art can conceive of any possible modifications based on this utility model, and these should all be considered to fall within the scope of this utility model.

[0022] The present invention proposes an automatic collection and compression integrated device 100 for film pulverization edge material, comprising: The feed duct 10 includes a main feed pipe 11 and at least two feed branch pipes 12 connected in parallel to the main feed pipe 11. A switching mechanism 13 is provided on the main feed pipe 11. The switching mechanism 13 is used to control the connection and disconnection between the main feed pipe 11 and each feed branch pipe 12. At least two compression chambers 20, each compression chamber 20 having a compression cavity 21, each compression chamber 20 having an inlet 22 and an outlet 23, the inlet branch pipe 12 being connected to the compression cavity 21 through the inlet 22; each compression chamber 20 is provided with a compression mechanism 30 and an outlet mechanism, the compression mechanism 30 being used to compress the film shredded edge material in the compression cavity 21, and the outlet mechanism being used to push the compressed edge material block out of the compression cavity 21 through the outlet 23; The controller is electrically connected to the switching mechanism 13, the compression mechanism 30 and the discharge mechanism respectively, and controls the operation of the switching mechanism 13, the compression mechanism 30 and the discharge mechanism.

[0023] The automatic collection and compression device 100 for film shredded edge material proposed in this utility model controls the film shredded edge material to alternately enter different compression chambers 20 via a controller and a switching mechanism 13. When one compression chamber 20 is collecting material, the other compression chamber 20 can simultaneously perform compression and discharge operations, avoiding production line downtime due to compression and discharge, realizing continuous automated operation of film shredded edge material collection and compression, and greatly improving processing efficiency.

[0024] The present invention proposes an automatic collection and compression integrated device 100 for film shredded edge material. The controller is electrically connected to the switching mechanism 13, the compression mechanism 30 and the discharge mechanism. It can automatically complete a series of actions such as feeding switching, compression molding and material block ejection, realizing automatic collection and compression of film shredded edge material. There is no need for personnel to switch valves, change and pack woven bags, which reduces the manual workload of film shredded edge material collection process and reduces the labor intensity and labor cost of on-site operators.

[0025] The present invention proposes an integrated automatic collection and compression device 100 for film shredding edge material. After the film is shredded, the shredded edge material is directly transported into the compression box 20, realizing the combination of collection and compression functions, reducing the step of collecting the shredded material with woven bags, and achieving efficiency improvement and material reduction.

[0026] In an optional embodiment of this utility model, the feed pipe 11 is connected to the film cutting device. The shredded edge material of the film after being cut by the film cutting device is cut by the front cutting fan and pulled into the feed pipe 11 by the negative pressure fan.

[0027] In an optional embodiment of this utility model, the switching mechanism 13 includes a switching air valve 131 and an air valve actuator 132 that is pulsatorically connected to the switching air valve 131. The air valve actuator 132 is electrically connected to the controller. With the above structure, the air valve actuator 132 drives the valve core of the switching air valve 131 to rotate or translate, thereby connecting the main feed pipe 11 to a feed branch pipe 12 and simultaneously disconnecting the main feed pipe 11 from the other feed branch pipe 12.

[0028] In one alternative embodiment of this implementation, the damper actuator 132 may be an electric actuator, a pneumatic actuator, or a hydraulic actuator.

[0029] In an optional embodiment of this invention, the compression mechanism 30 includes a vertical drive component 31 and a pressure plate 32. The vertical drive component 31 is located above the compression chamber 20 and is electrically connected to a controller. The piston rod of the vertical drive component 31 vertically penetrates the top plate of the compression chamber 20 and extends into the compression chamber 21. The pressure plate 32 is fixedly connected to the end of the piston rod and moves up and down under the drive of the piston rod. When the film shredded edge material enters the compression chamber 21 through the feed inlet 22, the pressure plate 32 is located at the top of the compression chamber 21. After the film shredded edge material is fed, the vertical drive component 31 drives the pressure plate 32 to move downward to compress the film shredded edge material in the compression chamber 21, thereby compressing the film shredded edge material into a block shape.

[0030] In an optional embodiment of this implementation, the inner wall of the compression chamber 20 is provided with a vertically extending guide rail 33, and the side of the pressure plate 32 is fixed with a guide rail slider 34. The guide rail slider 34 slides with the guide rail 33 to guide and prevent deviation, ensuring that when the vertical drive component 31 is activated, the pressure plate 32 can move up and down smoothly, and will not deviate due to uneven distribution of the film crushed edge material in the compression chamber 21, causing the pressure plate 32 to collide with the inner wall of the compression chamber 20, resulting in the compression mechanism 30 failing to operate normally or being damaged.

[0031] In an optional example, the guide rail slider 34 has a guide groove 341, and the guide rail 33 has a strip-shaped protrusion 331 that aligns with the guide groove 341, with the strip-shaped protrusion 331 extending along the length of the guide rail 33. With this structure, the strip-shaped protrusion 331 is embedded in the guide groove 341, effectively constraining the guide rail slider 34 to move only along the length of the guide rail 33, limiting its oscillation or rotation perpendicular to the direction of movement.

[0032] In an optional example, the strip protrusion 331 is provided with multiple guide wheels 332, which are spaced apart along the length of the strip protrusion 331. The rotation axis of each guide wheel 332 is perpendicular to the length of the strip protrusion 331. Each guide wheel 332 rolls with the bottom surface of the guide groove 341 to further reduce the friction between the guide rail 33 and the guide rail slider 34, making the up-and-down movement of the pressure plate 32 smoother and more responsive, and avoiding motion lag or jamming caused by excessive friction.

[0033] In an optional example, limiting grooves 333 are respectively formed on opposite sides of the strip protrusion 331. The two limiting grooves 333 are symmetrically arranged, and each limiting groove 333 is formed along the length direction of the strip protrusion 331. The opposite two groove walls of the guide groove 341 are provided with limiting protrusions 342 that align and cooperate with the limiting grooves 333. The limiting protrusions 342 and the limiting grooves 333 are in sliding engagement. The cooperation between the limiting protrusions 342 and the limiting grooves 333 provides an additional constraint surface in the direction perpendicular to the length of the guide rail and parallel to the plane of the pressure plate. This allows the guide rail slider 34 to be simultaneously constrained by multiple sets of mating surfaces during its movement, regardless of the lateral force it is subjected to, further reducing the sway gap and ensuring the straightness and perpendicularity of the pressure plate 32 during its downward and return strokes.

[0034] In an optional embodiment of this utility model, the discharge port 23 is located at the lower part of the side wall of the compression box 20, and the discharge mechanism includes: Door panel opening and closing mechanism 40, used to open or close the discharge port 23; The ejection mechanism 50 is located on the side opposite to the discharge port 23 of the compression box 20. The ejection mechanism 50 ejects the compressed film shredded edge material through the opened discharge port.

[0035] In an optional example of this implementation, the door opening and closing mechanism 40 includes: Door panel 41 is installed at the discharge port 23 in a way that allows it to be opened and closed; The opening and closing actuator 42 is connected to the door panel 41 and drives the door panel 41 to open and close. The opening and closing actuator 42 is electrically connected to the controller.

[0036] In an optional example of this implementation, the ejection mechanism 50 includes: The horizontal drive component 51 is located on the outside of the compression chamber 20 and is electrically connected to the controller. The piston rod of the horizontal drive component 51 horizontally passes through the side wall of the compression chamber 20 and extends into the compression chamber 21. Push plate 52 is fixedly connected to the end of piston rod and moves closer to or further away from discharge port 23 under the drive of piston rod.

[0037] In one optional embodiment of this utility model, a packaging bag is detachably installed on the outside of the discharge port 23 to collect the compressed film shredded edge material.

[0038] In an optional example of this embodiment, the packaging bag is a rigid packaging bag, the four corners of which are fixed to the discharge port 23 by clamps, thereby stably installing the rigid packaging bag on the discharge port 23.

[0039] In an optional example, the compression box 20 can be installed at a suitable height as needed, and the size of the packaging bag below the discharge port 23 door panel 41 can be enlarged to achieve more packaging bag capacity, reduce the frequency of collection and shorten the time.

[0040] In an optional embodiment of this invention, the vertical drive component 31 can be a hydraulic cylinder or a pneumatic cylinder; similarly, the horizontal drive component 51 can also be a hydraulic cylinder or a pneumatic cylinder.

[0041] In one optional embodiment of this utility model, through the automatic control of the controller, the operator sets the production line speed and product thickness. The controller automatically adjusts the action time of the air valve actuator 132 according to different production line speeds to ensure that the film crushed edge material in the compression chamber 21 of the compression box 20 accounts for 80-90% before switching. At the same time, according to different film thicknesses, the controller can set different hydraulic torque outputs and hydraulic strokes for the vertical drive component 31 to ensure that there is a corresponding torque to compress the film crushed edge material, ensuring that the film crushed edge material will not expand and collapse after being compressed into blocks, and at the same time, it will not cause damage to the cylinder of the vertical drive component 31 and the compression box 20 due to excessive torque.

[0042] In an optional example of this implementation, please refer to Figure 6 The controller is a programmable controller. The automatic collection and compression integrated device 100 includes two compression chambers 20, namely compression chamber A and compression chamber B. The compression mechanism 30 uses a vertical compression hydraulic cylinder as a vertical drive component 31. Specifically, compression chamber A corresponds to vertical compression hydraulic cylinder A, and compression chamber B corresponds to vertical compression hydraulic cylinder B. The ejection mechanism 50 uses a horizontally set discharge hydraulic cylinder as a horizontal drive component 51. Specifically, compression chamber A corresponds to discharge hydraulic cylinder A, and compression chamber B corresponds to discharge hydraulic cylinder B. At the same time, compression chamber A corresponds to discharge port door plate opening and closing actuator A, and compression chamber B corresponds to discharge port door plate opening and closing actuator B. The programmable controller is electrically or communicatively connected to the air valve actuator 132, vertical compression hydraulic cylinder A, vertical compression hydraulic cylinder B, discharge port gate plate opening and closing actuator A, discharge port gate plate opening and closing actuator B, discharge hydraulic cylinder A and discharge hydraulic cylinder B, and then sends start and stop signals to the above components according to the thickness of the film crushing edge material (product thickness) and the production speed of the polyimide production line (production line speed).

[0043] In another optional embodiment of this invention, the controller may be replaced by a microcontroller or other controllers.

[0044] Please refer to Figures 1 to 5 The working principle and specific implementation process of the automatic collection and compression integrated device 100 for film crushing edge material proposed in this utility model will now be described in detail with reference to an embodiment.

[0045] During normal production, the cut edge material is cut by the front cutting fan and pulled by the negative pressure fan through the feed duct 10 and feed port 22 into the compression chamber 20. The switching mechanism 13 connects one feed branch pipe 12 and disconnects the other feed branch pipe 12. The film crushed edge material enters the corresponding compression chamber 20 through the connected feed duct 10 via the switching valve 131. As production progresses, the film crushed edge material fills the compression chamber 21 of the compression chamber 20. The valve actuator 132 of the switching mechanism 13 controls the switching valve 131 to switch states, and the connected and disconnected states of the two feed branch pipes 12 are interchanged. The film crushed edge material enters the other compression chamber 20 through the switching valve 131. At this time, the vertical drive component 31 above the compression chamber 20, which is already filled with film shredded material, starts working. It pushes the pressure plate 32 to compress the film shredded material inside the compression chamber 20. After the compression process is completed, the controller controls the opening and closing actuator 42 of the door opening and closing mechanism 40 to push the door 41, opening the discharge port 23 of the compression chamber 20. After the discharge port 23 is open, the controller controls the horizontal drive component 51 to start working, pushing the push plate 52 at the head of the horizontal drive component 51 to push the compressed film shredded material out of the compression chamber 20. Under the action of gravity, it falls into the rigid packaging bag placed outside and below the door 41 of the discharge port 23, completing the collection, compression, and packaging of the film shredded material. While one compression chamber 20 is compressing and packaging the film shredded material, another compression chamber 20 is collecting the film shredded material. After it is full, the working state of the two compression chambers 20 is switched, thus achieving uninterrupted continuous collection and compression of the shredded material.

[0046] The detailed explanations of the above embodiments are intended only to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions should not be construed as limiting the present invention for any reason. In particular, the various features described in different embodiments can be arbitrarily combined with each other to form other embodiments. Unless there is an explicit description to the contrary, these features should be understood to be applicable to any embodiment, and not limited to the described embodiments.

Claims

1. An integrated automatic collection and compression device for film shredding edge material, characterized in that, The automatic collection and compression integrated device includes: The feed duct includes a main feed pipe and at least two feed branch pipes connected in parallel to the main feed pipe. The main feed pipe is provided with a switching mechanism, which is used to control the connection and disconnection between the main feed pipe and each of the feed branch pipes. At least two compression chambers are provided, each compression chamber having a compression cavity, each compression chamber having an inlet and an outlet, and the inlet branch pipe communicating with the compression cavity through the inlet; each compression chamber is provided with a compression mechanism and an outlet mechanism, the compression mechanism being used to compress the film pulverized edge material in the compression cavity, and the outlet mechanism being used to push the compressed edge material block out of the compression cavity through the outlet; The controller is electrically connected to the switching mechanism, the compression mechanism, and the discharge mechanism respectively, and controls the operation of the switching mechanism, the compression mechanism, and the discharge mechanism.

2. The automatic collection and compression integrated device for film pulverization edge material as described in claim 1, characterized in that, The switching mechanism includes a switching air valve and an air valve actuator that is kinetically connected to the switching air valve. The air valve actuator is electrically connected to the controller.

3. The automatic collection and compression integrated device for film pulverization edge material as described in claim 1, characterized in that, The compression mechanism includes a vertical drive component and a pressure plate. The vertical drive component is located above the compression chamber and is electrically connected to the controller. The piston rod of the compression mechanism vertically penetrates the top plate of the compression chamber and extends into the compression cavity. The pressure plate is fixedly connected to the end of the piston rod and moves up and down under the drive of the piston rod.

4. The automatic collection and compression integrated device for film pulverization edge material as described in claim 3, characterized in that, The inner wall of the compression chamber is provided with a vertically extending guide rail, and a guide rail slider is fixed to the side of the pressure plate, with the guide rail slider slidingly engaged with the guide rail.

5. The automatic collection and compression integrated device for film pulverization edge material as described in claim 4, characterized in that, The guide rail slider has a guide groove, and the guide rail has a strip-shaped protrusion that aligns with the guide groove. The strip-shaped protrusion is arranged along the length of the guide rail.

6. The automatic collection and compression integrated device for film pulverization edge material as described in claim 5, characterized in that, The strip-shaped protrusion is provided with a plurality of guide wheels, which are arranged at intervals along the length direction of the strip-shaped protrusion. The rotation axis of each guide wheel is set perpendicular to the length direction of the strip-shaped protrusion, and each guide wheel rolls in contact with the bottom surface of the guide groove.

7. The automatic collection and compression integrated device for film pulverization edge material as described in claim 5, characterized in that, Limiting grooves are respectively formed on both sides of the strip-shaped protrusion. The two limiting grooves are symmetrically arranged. Each limiting groove is formed along the length direction of the strip-shaped protrusion. The two opposite groove walls of the guide groove are provided with limiting protrusions that align and cooperate with the limiting grooves. The limiting protrusions and the limiting grooves are slidably engaged.

8. The automatic collection and compression integrated device for film pulverization edge material as described in claim 1, characterized in that, The discharge port is located at the lower part of the side wall of the compression chamber, and the discharge mechanism includes: A door panel opening and closing mechanism is used to open or close the discharge port; An ejection mechanism is located on the side of the compression chamber opposite to the discharge port. The ejection mechanism ejects the compressed film shredded edge material through the opened discharge port.

9. The automatic collection and compression integrated device for film pulverization edge material as described in claim 8, characterized in that, The door opening and closing mechanism includes: A door panel is installed at the discharge port in a way that allows it to be opened and closed; An opening / closing actuator is connected to the door panel and drives the door panel to open and close. The opening / closing actuator is electrically connected to the controller.

10. The automatic collection and compression integrated device for film pulverization edge material as described in claim 8, characterized in that, The launching agencies include: A horizontal drive component is located outside the compression chamber and electrically connected to the controller. The piston rod of the horizontal drive component horizontally penetrates the side wall of the compression chamber and extends into the compression cavity. A push plate is fixedly connected to the end of the piston rod and moves closer to or further away from the discharge port under the drive of the piston rod.

Images