Feeding device for plastic production

Abstract

The utility model discloses a feeding device for plastic production. The feeding device for plastic production comprises a feeding barrel and a connecting assembly. The feeding barrel comprises a first main body and a second main body which are split in the axial direction, one ends of the first main body and the second main body are feeding ends, and the other ends are discharging ends; the connecting assembly comprises a first magnetic attraction piece and a second magnetic attraction piece, the first magnetic attraction piece is connected to the end portion of the discharging end of the first main body, the second magnetic attraction piece is connected to the end portion of the discharging end of the second main body, and the first magnetic attraction piece and the second magnetic attraction piece are matched in a magnetic attraction mode to connect the first main body and the second main body. Rapid connection of the first main body and the second main body is achieved through magnetic attraction cooperation of the first magnetic attraction part and the second magnetic attraction part, rapid disassembly and assembly of the feeding barrel are achieved, the operation difficulty is low, and the working efficiency and the production efficiency are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of feeding equipment for plastic products, in particular to a feeding device for plastic production. Background Technique

[0002] An injection molding machine, also known as an injection molding machine or an injection machine, is the main molding equipment for making various shaped plastic products by using a plastic molding die with thermoplastic or thermosetting plastics. When the existing injection molding machine is in use, plastic particles need to be added to the injection molding machine in batches. However, the feeding port of the existing injection molding machine is at a certain height from the ground. Therefore, a feeding device is required to transport the plastic raw materials upward by means of spiral lifting and carry them into the plasticizing machine.

[0003] The Chinese utility model patent with the related publication number CN209794275U discloses a plastic particle feeding machine. The feeding cylinder of the feeding machine includes a split part A and part B. The two parts of part A and part B are fixedly connected by bolts to achieve the split effect of the feeding cylinder and facilitate cleaning.

[0004] Regarding the above related technology, the inventor believes that there are the following defects: The connection method of fixedly connecting part A and part B by bolts is relatively cumbersome and inefficient during disassembly and assembly. Extra tools are also required, and the operation difficulty is high, which affects the work efficiency and production efficiency. Content of the Utility Model

[0005] The utility model aims to solve at least one of the problems in the related technology to some extent. Therefore, one of the purposes of the utility model is to provide a feeding device for plastic production, which is used to realize the rapid disassembly and assembly of the feeding cylinder, with low operation difficulty and improved work efficiency and production efficiency.

[0006] A feeding device for plastic production, the feeding device for plastic production includes:

[0007] A feeding cylinder, the feeding cylinder includes a first main body and a second main body that are split along the axial direction. One end of the first main body and the second main body is the feeding end, and the other end is the discharging end;

[0008] A connection assembly, the connection assembly includes a first magnetic attracting member and a second magnetic attracting member. The first magnetic attracting member is connected to the end of the discharging end of the first main body, and the second magnetic attracting member is connected to the end of the discharging end of the second main body. The first magnetic attracting member and the second magnetic attracting member are magnetically matched to connect the first main body and the second main body.

[0009] Further, the first magnetic attracting member is a magnet, and the second magnetic attracting member is a magnet or a metal.

[0010] Further, the number of the first magnetic members and the second magnetic members is plural. The first magnetic members are arranged at intervals along the radial direction of the end face of the discharging end of the first main body, and the second magnetic members are arranged at intervals along the radial direction of the end face of the discharging end of the second main body. One first magnetic member is magnetically coupled with one second magnetic member.

[0011] Further, a groove is recessed in the connecting surface of the first magnetic member along the radial direction, and a protrusion is protruded in the connecting surface of the second magnetic member along the radial direction. When the first magnetic member is magnetically coupled with the second magnetic member, the protrusion is inserted into the groove.

[0012] Further, the cross-sectional shape of the groove is arc-shaped, and the cross-sectional shape of the protrusion is adapted to the cross-sectional shape of the groove.

[0013] Further, the first magnetic member and the second magnetic member are respectively arranged on one side surface opposite to the end of the first main body and the end of the second main body.

[0014] Further, the connecting assembly further includes a sealing member, and the sealing member is arranged between the first magnetic member and the second magnetic member.

[0015] Further, the connecting assembly further includes a connecting member and a locking module. The connecting member is arranged at the end of the first main body, and the locking module is arranged at the end of the second main body. After the first main body and the second main body are connected, the locking module moves to lock or disengage from the connecting member.

[0016] Further, the locking module includes a connecting seat, a rotating shaft and a fastening member. The connecting seat is connected to the second main body. Both ends of the rotating shaft are rotatably connected to the connecting seat. One end of the fastening member is fixedly connected to the rotating shaft. Rotating the fastening member drives the other end thereof to be clamped or disengaged from the connecting member.

[0017] Further, the locking module further includes a torsion spring. The torsion spring is sleeved on the rotating shaft. One end of the torsion spring abuts against the connecting seat, and the other end abuts against the fastening member.

[0018] And / or, a limiting member is protruded along the axial direction of the first main body on the connecting member, and a limiting groove is recessed in the fastening member. When the fastening member is clamped with the connecting member, the limiting

[0019] The above technical solutions provided by the embodiments of the present application have the following advantages compared with the prior art:

[0020] In this application, the first main body and the second main body located in the feeding cylinder are respectively provided with a first magnetic attraction member and a second magnetic attraction member. The first main body and the second main body are quickly connected through the magnetic attraction cooperation of the first magnetic attraction member and the second magnetic attraction member, realizing the quick disassembly and assembly of the feeding cylinder, with low operation difficulty, and improving work efficiency and production efficiency. Description of the Drawings

[0021] The drawings here are incorporated into the specification and form a part of this specification, showing the embodiments in line with the present utility model, and are used together with the specification to explain the principles of the present utility model.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0023] In the drawings:

[0024] Figure 1 is a schematic structural diagram of an embodiment of a feeding device for plastic production in this application;

[0025] Figure 2 is Figure 1 a partial enlarged structural diagram of part A in

[0026] Figure 3 is Figure 2 a partial enlarged structural diagram of another embodiment;

[0027] Figure 4 is a partial structural diagram of the combination of the first main body and the second main body in the feeding device for plastic production in this application;

[0028] Figure 5 is a structural diagram of the separation of the first main body and the second main body in the feeding device for plastic production in this application.

[0029] Reference numerals: 1, a feeding device for plastic production; 10, a feeding cylinder; 11, a first main body; 13, a second main body; 30, a connection assembly; 31, a first magnetic attraction member; 311, a groove; 32, a second magnetic attraction member; 321, a protrusion; 33, a seal; 34, a connecting member; 341, a limiting member; 35, a locking module; 351, a connecting seat; 353, a rotating shaft; 355, a fastening member; 3551, a limiting groove; 357, a torsion spring. Detailed Embodiments

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0032] As Figure 1 - Figure 3 shown, a feeding device 1 for plastic production provided by the present application includes:

[0033] A feeding cylinder 10, the feeding cylinder 10 includes a first main body 11 and a second main body 13 that are separated along the axial direction. One end of the first main body 11 and the second main body 13 is the feeding end, and the other end is the discharging end;

[0034] A connecting component 30, the connecting component 30 includes a first magnetic attracting member 31 and a second magnetic attracting member 32. The first magnetic attracting member 31 is connected to the end of the discharging end of the first main body 11, and the second magnetic attracting member 32 is connected to the end of the discharging end of the second main body 13. The first magnetic attracting member 31 and the second magnetic attracting member 32 are magnetically matched to connect the first main body 11 and the second main body 13.

[0035] The design of the feeding cylinder 10 includes two main parts, namely the first main body 11 and the second main body 13 that are separated along the axial direction. A screw is provided inside the feeding cylinder 10. The end of the screw is connected to the motor through a belt. The motor is located outside the feeding cylinder 10. The raw material enters the feeding end of the feeding cylinder 10 through the belt, and then the raw material is conveyed through the screw, and the raw material is transported upward from the feeding end of the feeding cylinder to the discharging end. The first main body 11 and the second main body 13 are structurally independent of each other, but they jointly constitute the overall function of the feeding cylinder 10. Specifically, one end of the first main body 11 and the second main body 13 is designed as the feeding end, which is the entrance for the material to enter the feeding cylinder 10; while the other end is designed as the discharging end, which is the outlet for the material to be output from the feeding cylinder 10. The discharging port and the air cylinder are both located on the second main body 13.

[0036] To ensure that the first body 11 and the second body 13 can be stably connected together, we have designed a unique connecting component 30. This connecting component 30 includes two main magnetic components, namely the first magnetic component 31 and the second magnetic component 32. The magnetic components can be neodymium iron boron magnets, ferrite magnets, etc. The first magnetic component 31 is precisely installed at the end of the discharge end of the first body 11, while the second magnetic component 32 is precisely installed at the end of the discharge end of the second body 13. When it is necessary to install and combine the first body 11 and the second body 13, the two magnetic components are brought closer, and these two magnetic components attract each other through magnetic force, thereby realizing the tight combination of the first body 11 and the second body 13. This magnetic attraction cooperation method not only ensures the stability of the connection, but also enables convenient and quick operation when it is necessary to disassemble or adjust the feeding cylinder 10.

[0037] Through this design, the structure of the feeding cylinder 10 becomes more flexible and adjustable, and at the same time, the maintenance efficiency and service life of the equipment are improved. In addition, the design of the magnetic components can also effectively prevent material leakage during the feeding process, ensuring the smoothness and safety of the entire production process. Generally speaking, this design of the feeding cylinder 10 has significant advantages in improving production efficiency and ensuring product quality.

[0038] Optionally, wear-resistant coatings can be provided on the inner walls of the first body 11 and the second body 13 to reduce the wear of the material during transportation and extend the service life of the feeding cylinder 10. The wear-resistant coatings can be made of ceramic materials, cemented carbides or special plastics, etc., to adapt to the characteristics of different materials.

[0039] Optionally, to meet the requirements of different production environments, this application also provides various specifications and models of the feeding cylinder 10. Users can select a suitable feeding cylinder 10 according to actual production needs, such as different lengths, diameters, screw types, etc., to meet various different production scenarios. In addition, the connecting component 30 of the feeding cylinder 10 is also designed to be standardized and modular, which is convenient for disassembly and replacement, greatly improving the versatility of the equipment and the convenience of maintenance.

[0040] Furthermore, the first magnetic component 31 is a magnet, and the second magnetic component 32 is a magnet or a metal.

[0041] The first magnetic attracting member 31 is a magnet made of magnetic material, which has the property of attracting and holding magnetic substances. This magnet assembly is the active part in the whole connection system, and it can generate an attractive force with another object through its inherent magnetic force. The second magnetic attracting member 32 can be another magnet or any object containing metal components. This assembly plays a passive role in the system and can be attracted and fixed by the first magnet assembly. When the two assemblies approach each other, due to the action of magnetic force, they will naturally attract and tightly combine together to form a stable connection. This connection method is very useful in many applications, such as in some occasions where quick connection and disconnection are required, or in structures where a certain distance and angle need to be maintained. Through this magnetic connection, rapid, simple and reliable connection between objects can be achieved, and it is also convenient for subsequent disassembly and recombination.

[0042] Furthermore, the numbers of the first magnetic attracting member 31 and the second magnetic attracting member 32 are both multiple. The first magnetic attracting member 31 is arranged at intervals along the radial direction of the end face of the discharging end of the first main body 11, and the second magnetic attracting member 32 is arranged at intervals along the radial direction of the end face of the discharging end of the second main body 13. One first magnetic attracting member 31 is magnetically coupled with one second magnetic attracting member 32.

[0043] In the embodiment of the present invention, the numbers of the first magnetic attracting member 31 and the second magnetic attracting member 32 are both set to be multiple, and can be 3, 4, 5, etc. In practical applications, operators can configure multiple magnetic attracting members according to needs to meet different usage scenarios and requirements. Specifically, the first magnetic attracting member 31 is uniformly and spacedly arranged along the radial direction of the end face of the discharging end of the first main body 11. Such a layout can ensure that the magnetic attraction force is evenly distributed on the entire end face of the discharging end, thereby improving the stability and reliability of the device. Similarly, the second magnetic attracting member 32 is also uniformly and spacedly arranged along the radial direction of the end face of the discharging end of the second main body 13. This design is also to ensure the even distribution of the magnetic attraction force and to form a good magnetic coupling with the first magnetic attracting member 31. When the first magnetic attracting member 31 corresponds to the second magnetic attracting member 32, magnetic attraction force can be mutually generated between them, thereby forming a stable connection between the two main bodies. This design of magnetic coupling not only improves the assembly efficiency of the device, but also enhances the safety of the device during operation. Due to the magnetic force of the magnetic attracting members, the two main bodies can be quickly and accurately aligned when connected, reducing the complexity and time cost of operation. In addition, the use of magnetic attracting members can also avoid the wear and looseness problems that may occur in traditional mechanical connection methods, thereby prolonging the service life of the device.

[0044] Furthermore, a groove 311 is concavely provided in the connection surface of the first magnetic attracting member 31 in the radial direction, and a protrusion 321 is convexly provided in the connection surface of the second magnetic attracting member 32 in the radial direction. When the first magnetic attracting member 31 and the second magnetic attracting member 32 are magnetically engaged, the protrusion 321 is inserted into the groove 311.

[0045] In this embodiment, the groove 311 is concavely recessed uniformly inward in the radial direction to form a suitable accommodating space. At the same time, the connection surface of the second magnetic attracting member 32 is also correspondingly designed, and a protrusion 321 structure with a certain height is convexly provided thereon in the radial direction. This protrusion 321 part is designed to match the groove 311 of the first magnetic attracting member 31, ensuring that when the two magnetic attracting members are magnetically engaged, the protrusion 321 on the second magnetic attracting member 32 can be smoothly inserted into the groove 311 of the first magnetic attracting member 31. This structural design not only enhances the connection stability between the two magnetic attracting members, but also enables the two components to be closely combined through the mutual attraction of magnetic forces, thereby providing a more stable and reliable connection effect during use.

[0046] Furthermore, the cross-sectional shape of the groove 311 is arc-shaped, and the cross-sectional shape of the protrusion 321 is adapted to the cross-sectional shape of the groove 311.

[0047] In this embodiment, the cross-section of the groove 311 part presents a smooth curved shape, which is similar to a semicircle or an arc. Such a design makes the groove 311 appear very round and smooth both visually and tactilely. At the same time, for the corresponding protrusion 321 part, the cross-sectional shape is carefully designed to match the arc-shaped cross-section of the groove 311. This matching not only lies in the shape, but also includes the precise docking of dimensions and contours, ensuring that the protrusion 321 part can be smoothly embedded in the groove 311, having a guiding connection effect, so as to achieve a seamless combination between the two. This design not only enhances the overall aesthetics of the structure, but also improves its functionality and durability, because the well-fitted protrusion 321 and groove 311 can better withstand pressure and wear, extending the service life of the overall structure.

[0048] Furthermore, the first magnetic attracting member 31 and the second magnetic attracting member 32 are respectively arranged on opposite side surfaces of the end of the first main body 11 and the end of the second main body 13.

[0049] In this embodiment, the first magnetic attracting member 31 is disposed at the end portion of the structure of the first main body 11, and the second magnetic attracting member 32 is disposed on the opposite side of the end portion of the structure of the second main body 13. Such a layout ensures that when the first main body 11 and the second main body 13 approach each other, the two magnetic attracting members can effectively perform magnetic attraction, thereby realizing the tight connection of the two main body structures. Moreover, after the first main body 11 and the second main body 13 are combined, the two side surfaces are mutually attached, and the connecting component 30 can be hidden within the two connecting surfaces, and the connecting structure cannot be seen from the outside. This design not only takes into account the magnetic force of the magnetic attracting members, but also considers the aesthetics and practicality of the overall structure, ensuring that in the actual use process, the two main bodies can be combined and separated conveniently and quickly, and at the same time, the stability and safety of the connection are guaranteed.

[0050] Furthermore, the connecting component 30 further includes a sealing member 33, and the sealing member 33 is disposed between the first magnetic attracting member 31 and the second magnetic attracting member 32.

[0051] In this embodiment, the sealing member 33 can be a sealing ring, a gasket, a sealing liquid, etc. The sealing ring is usually made of an elastic material and can closely fit on the contact surface of the magnetic attracting member to effectively prevent the intrusion of external substances; the gasket may be composed of a soft and elastic material and can form a barrier between the two magnetic attracting members to prevent the leakage of liquid or gas; and the sealing liquid is a fluid filled between the two magnetic attracting members, and it can form a uniform isolation layer between the contact surfaces to further improve the sealing effect. By using these sealing members 33, the connecting component 30 can not only maintain the stability of its magnetic connection, but also effectively prevent leakage problems caused by environmental factors or changes in working conditions, thereby ensuring the safety and reliability of the entire system.

[0052] Furthermore, as Figure 4 、 Figure 5 shown, the connecting component 30 further includes a connecting member 34 and a locking module 35. The connecting member 34 is disposed at the end of the first main body 11, and the locking module 35 is disposed at the end of the second main body 13. After the first main body 11 and the second main body 13 are connected, the locking module 35 moves to lock or disengage from the connecting member 34.

[0053] In this embodiment, when the first main body 11 and the second main body 13 need to be connected, the operator can, through a simple operation, move the locking module 35 along a predetermined path, thereby achieving a firm locking of the connecting member 34 or easily releasing the locked state when needed. Such a design not only ensures the stability of the connection but also provides convenient and quick connection and separation operations, greatly improving the flexibility and practicality of the overall structure. Through this ingenious design, while maintaining the original functions, the connection assembly 30 also increases the operation convenience and system reliability. The connecting member 34 and the locking module 35 can be in different forms such as a plug and a socket, a snap and a slot, a rotating block and a limiting hole, etc., which are not limited herein.

[0054] Further, the locking module 35 includes a connection seat 351, a rotating shaft 353, and a fastening member 355. The connection seat 351 is connected to the second main body 13. Both ends of the rotating shaft 353 are rotatably connected to the connection seat 351. One end of the fastening member 355 is fixedly connected to the rotating shaft 353, and by rotating the fastening member 355, the other end thereof is engaged with or disengaged from the connecting member 34.

[0055] In this embodiment, it includes a connection seat 351, a rotating shaft 353, and a fastening member 355. The connection seat 351 is the basis of the entire locking module 35 and is designed to be firmly connected and fixed to the second main body 13. The rotating shaft 353, as a bridge between the connection seat 351 and the fastening member 355, has both ends designed to be rotatable flexibly in the connection seat 351, ensuring the flexibility and reliability of the locking module 35. The fastening member 355 is the core component for realizing the locking function in the locking module 35. One end of it is fixedly connected to the rotating shaft 353, while the other end is designed to perform the actions of engaging with or disengaging from the connecting member 34. By rotating the fastening member 355, the control of the locking module 35 can be achieved. When the fastening member 355 is rotated, the other end thereof will produce a corresponding displacement, and this displacement can make the engaging end of the fastening member 355 cooperate closely with the connecting member 34 or be released from the connecting member 34. This design makes the locking module 35 have high operation flexibility and control accuracy in practical applications and can quickly and accurately complete the locking or unlocking actions as needed. Such a structure not only ensures the stability and durability of the locking module 35 but also improves the safety of the entire system, ensuring that it can reliably perform its functions in various working environments.

[0056] Further, the locking module 35 further includes a torsion spring 357. The torsion spring 357 is sleeved on the rotating shaft 353. One end of the torsion spring 357 abuts against the connection seat 351, and the other end abuts against the fastening member 355;

[0057] In this embodiment, the torsion spring 357 is sleeved on the rotating shaft 353. Its design purpose is to provide a continuous and uniform torsion force to ensure the stability and reliability of the locking module 35. Specifically, one end of the torsion spring 357 is precisely abutted against the connecting seat 351, which is a fixed component in the locking module 35 and provides a stable support point for the torsion spring 357. The other end of the torsion spring 357 is abutted against the fastener 355, which is a component used to fix and connect other components in the locking module 35. In this way, when the fastener 355 moves downward for locking, it is in the normal relaxation state of the torsion spring 357, and when the fastener 355 is rotated upward to open, it is in the state of compressing the torsion spring 357. The torsion spring 357 can generate a reverse torsion force when the fastener 355 is rotated to open, so as to maintain the effect of the fastener 355 automatically resetting and locking and remaining in the locked state after locking, ensuring the tight connection and stable operation of the entire system. This design not only improves the performance of the locking module 35 but also enhances its adaptability and durability in various working environments.

[0058] And / or, the connecting member 34 protrudes with a limiting member 341 along the axial direction of the first main body 11, and the fastener 355 is recessed with a limiting groove 3551. When the fastener 355 is clamped with the connecting member 34, the limiting member 341 is inserted into the limiting groove 3551.

[0059] In this embodiment, when the fastener 355 is clamped with the connecting member 34, the limiting member 341 will accurately insert into the limiting groove 3551 on the fastener 355, thereby enabling radial fixed limiting of the first main body 11 and the second main body 13. It also ensures the stable connection between the connecting member 34 and the fastener 355, and through the cooperation of the limiting member 341 and the limiting groove 3551, it prevents unnecessary displacement or rotation of the connecting member 34 during use. Such a structural design greatly improves the stability and reliability of the overall assembly, and also provides convenience for subsequent disassembly and maintenance, because the cooperation of the limiting member 341 and the limiting groove 3551 can ensure that the connecting member 34 can be easily separated from the fastener 355 during disassembly without causing any damage to the assembly.

[0060] It can be understood that the above embodiments only represent the preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent of the present invention; it should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can also be made, which all belong to the protection scope of the present invention; therefore, all equivalent transformations and modifications made to the scope of the claims of the present invention shall fall within the scope covered by the claims of the present invention.

Claims

1. A feeding device for plastic production, characterized in that: include: An upper barrel, the upper barrel comprising a first main body and a second main body which are separated in the axial direction, one end of the first main body and the second main body being a feeding end, and the other end being a discharging end; A connecting component, the connecting component includes a first magnetic component and a second magnetic component, the first magnetic component is connected to the discharge end of the first body, the second magnetic component is connected to the discharge end of the second body, the first magnetic component and the second magnetic component are magnetically matched to connect the first body and the second body.

2. A feeding device for plastic production according to claim 1, characterized in that: The first magnetic attraction member is a magnet, and the second magnetic attraction member is a magnet or metal.

3. A feeding device for plastic production according to claim 2, characterized in that: The number of the first magnetic attraction parts and the number of the second magnetic attraction parts are both multiple. The first magnetic attraction parts are arranged at intervals along the radial direction of the end face of the discharge end of the first body, and the second magnetic attraction parts are arranged at intervals along the radial direction of the end face of the discharge end of the second body. One first magnetic attraction part and one second magnetic attraction part are magnetically matched.

4. A feeding device for plastic production according to claim 3, characterized in that: The connection surface of the first magnetic attraction member is concavely provided with a groove in the radial direction, and the connection surface of the second magnetic attraction member is convexly provided with a protrusion in the radial direction. When the first magnetic attraction member and the second magnetic attraction member are magnetically matched, the protrusion is inserted into the groove.

5. A feeding device for plastic production according to claim 4, characterized in that: The cross-sectional shape of the groove is an arc, and the cross-sectional shape of the protrusion is matched with the cross-sectional shape of the groove.

6. A feeding device for plastic production according to any one of claims 1 to 5, characterized in that: The first magnetic attraction component and the second magnetic attraction component are respectively arranged on a side surface of an end portion of the first body and an end portion of the second body that are opposite to each other.

7. A feeding device for plastic production according to claim 6, characterized in that: The connecting component also includes a sealing member, and the sealing member is arranged between the first magnetic attraction member and the second magnetic attraction member.

8. A feeding device for plastic production according to any one of claims 1 to 5, characterized in that: The connection assembly also includes a connection piece and a locking module. The connection piece is arranged at the end of the first body, and the locking module is arranged at the end of the second body. When the first body is connected with the second body, the locking module moves to lock or disengage the connection piece.

9. A feeding device for plastic production according to claim 8, characterized in that: The locking module includes a connecting seat, a rotating shaft and a fastener. The connecting seat is connected to the second body, both ends of the rotating shaft are rotatably connected to the connecting seat, one end of the fastener is fixedly connected to the rotating shaft, and the fastener is rotated to drive the other end thereof to engage or disengage from the connecting member.

10. A feeding device for plastic production according to claim 9, characterized in that: The locking module further includes a torsion spring, which is sleeved on the rotating shaft, one end of the torsion spring abuts against the connecting seat, and the other end of the torsion spring abuts against the fastener; And / or, the connecting member is provided with a stopper protruding along the axial direction of the first main body, and the fastener is provided with a stopper groove concavely, and when the fastener is engaged with the connecting member, the stopper is inserted into the stopper groove.

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