Uniform feeding device for raw material additive

Abstract

The utility model relates to the technical field of plastic processing, in particular to a uniform feeding device for raw material additives, which is simple in structure and capable of quickly removing residual additives in a pipeline before the additives are replaced so as to reduce the influence time of old additives on products. Comprising a stock bin, the bottom of the stock bin communicates with a feeding pipeline, a feeding screw is installed in the feeding pipeline, and the bottom of the output end of a discharging pipeline communicates with a downward discharging pipeline; the top of the output end of the discharging pipeline communicates with a sweeping pipeline, a first valve is arranged in the sweeping pipeline, the discharging pipeline is provided with a second valve, and the first valve and the second valve are opposite in state. The driving mechanism is used for driving the valve I and the valve II to act simultaneously; the input end of the sweeping pipeline communicates with a dust collection mechanism.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic processing, in particular to a device for uniformly feeding raw material additives. Background Art

[0002] In the plastics processing industry, various additives are often added to the base resin to improve the performance, appearance, or processing characteristics of plastic products. These additives can include plasticizers, stabilizers, colorants, antioxidants, and more. To ensure that the additives are evenly dispersed throughout the plastic matrix, existing technologies often use screw feeding to deliver the additives to an extruder or other mixing equipment.

[0003] A screw feeding system is a commonly used feeding device that uses a rotating screw to push solid or semi-solid materials from a feed port to downstream processing equipment. This system offers advantages such as simple structure, easy operation, and continuous feeding, making it suitable for a variety of raw materials. However, in practice, when it comes to replacing additives of different types or colors, traditional screw feeding systems have certain limitations. Dead angles between the screw and the pipe, as well as within the pipe itself, prevent the old additive from being completely removed, leading to mixing of the new and old additives and affecting product quality. Utility Model Content

[0004] In order to solve the above technical problems, the utility model provides a raw material additive uniform feeding device, which has a simple structure and can quickly remove the residual additives in the pipeline before replacing the additives, thereby reducing the impact time of the old additives on the product.

[0005] The utility model discloses a uniform feeding device for raw material additives, comprising a silo, wherein the bottom of the silo is connected to a feeding pipe, a feeding screw is installed in the feeding pipe, the bottom of the output end of the discharge pipe is connected to a downward discharge pipe; the top of the output end of the discharge pipe is connected to a cleaning pipe, a valve 1 is provided in the cleaning pipe, and a valve 2 is provided in the discharge pipe, and the states of the valve 1 and the valve 2 are opposite; the utility model also includes a driving mechanism for driving the valve 1 and the valve 2 to operate simultaneously; the input end of the cleaning pipe is connected to a dust collection mechanism.

[0006] As a preferred solution of the present invention, the driving mechanism includes a fixed rod 1 fixed on the valve stem of valve 1 and a fixed rod 2 fixed on the valve stem of valve 2, and also includes a power mechanism for driving the fixed rod 1 and the fixed rod 2 to rotate synchronously.

[0007] As a preferred solution of the present invention, the power mechanism includes a translation mechanism fixed on the feeding pipe, the output end of the translation mechanism is a driving rod, and both ends of the driving rod are fixed with fixed shafts, and the two fixed shafts are respectively slidably connected to fixed rod one and fixed rod two.

[0008] As a preferred solution of the present invention, both the first fixing rod and the second fixing rod are provided with elongated holes, and the two fixing shafts pass through the two elongated holes respectively.

[0009] As a preferred solution of the present invention, the translation mechanism includes a platform fixedly connected to the feeding pipe, the platform is equipped with a bearing seat, a screw is rotatably connected to the bearing seat, the screw is threadedly connected to the moving plate, and the driving rod is installed on the moving plate.

[0010] As a preferred solution of the present invention, the translation mechanism further includes a track fixedly connected to the platform, and the track is slidably connected to the movable plate.

[0011] As a preferred solution of the present invention, the translation mechanism further includes a power mechanism connected to the end of the screw rod.

[0012] As a preferred solution of the present invention, a fixed block is fixed in the middle of the driving rod, the fixed block and the driving rod form a cross shape, four stoppers are fixedly connected to the movable plate, and the fixed block is stuck in the four stoppers.

[0013] As a preferred solution of the present invention, the four blocks are detachably connected to a baffle.

[0014] As a preferred solution of the present utility model, two proximity switches are provided on the platform.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: when the additive is normally conveyed, the additive is placed in the hopper, valve one is in a closed state, valve two is open, and the additive enters the discharge pipe from the hopper through the feeding pipe through the feeding screw, and finally reaches the downstream processing equipment. When the type of additive needs to be changed, the valve state is switched by the driving mechanism so that valve one is opened and valve two is closed at the same time, the dust suction mechanism and the feeding screw are started, and the residual additive in the feeding pipe is sucked out through the cleaning pipe by the negative pressure effect until the inside of the feeding pipe is fully cleaned. Compared with the prior art, it can significantly reduce the transition period impact caused by the additive replacement process, improve production efficiency while also ensuring product quality consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural diagram of the utility model;

[0017] Figure 2 yes Figure 1 A partial enlarged view of part A in the middle;

[0018] Figure 3 It is a cross-sectional view of the utility model;

[0019] Figure 4This is a front view of the feeding pipe, valve 1, valve 2 and drive mechanism;

[0020] Figure 5 It is a structural diagram of the translation mechanism and the driving rod;

[0021] Markings in the attached figure: 1. silo; 2. feeding pipe; 3. feeding screw; 4. discharging pipe; 5. cleaning pipe; 6. valve one; 7. valve two; 8. dust suction mechanism; 9. fixing rod one; 10. fixing rod two; 11. driving rod; 12. fixed shaft; 13. long hole; 14. platform; 15. bearing seat; 16. screw; 17. moving plate; 18. track; 19. power mechanism; 20. fixing block; 21. stop block; 22. baffle; 23. proximity switch. DETAILED DESCRIPTION

[0022] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0023] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0024] Secondly, the term "embodiment" as used herein refers to specific features, structures, or characteristics that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0025] Example

[0026] Reference Figure 1-Figure 5 This embodiment provides a uniform feeding device for raw material additives, including a silo 1, a feeding pipe 2 is connected to the bottom of the silo 1, a feeding screw 3 is installed in the feeding pipe 2, and the bottom of the output end of the discharge pipe 4 is connected to the downward discharge pipe 4; the top of the output end of the discharge pipe 4 is connected to a cleaning pipe 5, such as Figure 1 、 Figure 3 As shown, the cleaning pipe 5 is located directly above the discharge pipe 4. A valve 1 6 is provided in the cleaning pipe 5, and a valve 2 7 is provided in the discharge pipe 4. Both valves 1 6 and 2 7 are butterfly valves. The states of valve 1 6 and valve 2 7 are opposite, that is, when valve 1 6 is open, valve 2 7 is closed, and when valve 1 6 is closed, valve 2 7 is open. The cleaning pipe 5 also includes a driving mechanism for driving valve 1 6 and valve 2 7 to operate simultaneously. The input end of the cleaning pipe 5 is connected to a dust collection mechanism 8, and the dust collection mechanism can use an industrial vacuum cleaner.

[0027] In this embodiment, when the additive is normally conveyed, the additive is placed in the silo 1, the valve 1 6 is in a closed state, the valve 2 7 is open, and the additive passes through the feeding screw 3 from the silo 1 through the feeding pipe 2 into the discharge pipe 4, and finally reaches the downstream processing equipment. When the type of additive needs to be changed, the valve state is switched by the driving mechanism so that the valve 1 6 is opened and the valve 2 7 is closed at the same time, the dust collection mechanism 8 and the feeding screw 3 are started, and the residual additive in the feeding pipe 2 is sucked through the cleaning pipe 5 by the negative pressure effect until the inside of the feeding pipe 2 is fully cleaned. Compared with the existing technology, it can significantly reduce the transition period impact caused by the additive replacement process, improve production efficiency and also ensure product quality consistency.

[0028] As a preferred embodiment of the present invention, the driving mechanism includes a fixing rod 1 9 fixed to the valve stem of valve 1 6 and a fixing rod 2 10 fixed to the valve stem of valve 2 7, and also includes a power mechanism 19 for driving the fixing rod 1 9 and the fixing rod 2 10 to rotate synchronously;

[0029] In this embodiment, if Figure 4 As shown, the fixing rod 1 9 and the fixing rod 2 10 are both inclined and parallel. The power mechanism 19 drives the fixing rod 1 9 and the fixing rod 2 10 to rotate synchronously to switch the states of the valve 1 6 and the valve 2 7.

[0030] As a preferred embodiment of the present invention, the power mechanism 19 includes a translation mechanism fixed to the feeding pipe 2, the output end of the translation mechanism is a driving rod 11, and both ends of the driving rod 11 are fixed with fixed shafts 12, and the two fixed shafts 12 are respectively slidably connected to the fixed rod 1 9 and the fixed rod 2 10; the fixed rod 1 9 and the fixed rod 2 10 are both provided with a long hole 13, and the two fixed shafts 12 pass through the two long holes 13 respectively;

[0031] In this embodiment, the function of the translation mechanism is to drive the driving rod 11 to translate. When the status of valve 1 6 and valve 2 7 needs to be adjusted, the translation mechanism is operated to cause the driving rod 11 and the two fixed shafts 12 to move vertically. Since the two fixed shafts 12 pass through the two long holes 13 respectively, they push the fixed rod 1 9 and the fixed rod 2 10 to rotate around the valve stems of their respective valves, thereby controlling the status of valve 1 6 and valve 2 7.

[0032] As a preferred embodiment of the present invention, the translation mechanism includes a platform 14 fixedly connected to the feeding pipe 2, the platform 14 is equipped with a bearing seat 15, a screw rod 16 is rotatably connected to the bearing seat 15, the screw rod 16 is threadedly connected to the movable plate 17, and the driving rod 11 is mounted on the movable plate 17; the translation mechanism also includes a track 18 fixedly connected to the platform 14, and the track 18 is slidably connected to the movable plate 17; the translation mechanism also includes a power mechanism 19 connected to the end of the screw rod 16, and the power mechanism 19 adopts a servo motor;

[0033] In this embodiment, the screw rod 16 is arranged vertically and is driven to rotate synchronously by controlling the power mechanism 19. Since the movable plate 17 and the screw rod 16 are connected by a thread, the rotation of the screw rod 16 will be converted into a linear motion of the movable plate 17 along the track 18. The movable plate 17 drives the driving rod 11 to move, thereby switching the states of valve 1 6 and valve 2 7.

[0034] As a preferred embodiment of the present invention, Figure 4 and Figure 5 As shown, a fixed block 20 is fixed to the middle of the driving rod 11, and the fixed block 20 and the driving rod 11 form a cross shape. Four stoppers 21 are fixedly connected to the movable plate 17, and the fixed block 20 is stuck in the four stoppers 21; the four stoppers 21 are detachably connected to the baffles 22;

[0035] In this embodiment, the driving rod 11 is fixed to the movable plate 17 by the fixing block 20, the stop block 21 and the baffle 22 to prevent the movable plate 17 and the driving rod 11 from moving relative to each other. When the driving rod 11 needs to be disassembled, the baffle 22 is removed, and then the driving rod 11 and the fixing block 20 are pulled out.

[0036] As a preferred solution of the present invention, two proximity switches 23 are provided on the platform 14;

[0037] In this embodiment, both proximity switches 23 are used to control the stopping of the moving plate 17, one of the proximity switches 23 is used to control the valve 1 6 to be opened while the valve 2 7 is closed, and the other is used to control the valve 1 6 to be closed while the valve 2 7 is opened.

[0038] It will be appreciated that in the development of any actual embodiment, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but will, for those of ordinary skill having the benefit of this disclosure, be a routine undertaking of design, fabrication, and production without undue experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, and all of these should be included in the scope of the claims of the present invention.

Claims

1. A device for uniformly feeding raw materials and additives, comprising a silo (1), wherein the bottom of the silo (1) is connected to a feeding pipe (2), a feeding screw (3) is installed in the feeding pipe (2), and the bottom of the output end of the discharge pipe (4) is connected to a downward discharge pipe (4); characterized in that, The top of the output end of the discharge pipe (4) is connected to a cleaning pipe (5), a valve 1 (6) is provided in the cleaning pipe (5), and the discharge pipe (4) is provided with a valve 2 (7), the state of the valve 1 (6) and the state of the valve 2 (7) are opposite; the device also includes a driving mechanism for driving the valve 1 (6) and the valve 2 (7) to operate simultaneously; the input end of the cleaning pipe (5) is connected to a dust collection mechanism (8).

2. A raw material additive uniform feeding device according to claim 1, characterized in that: The driving mechanism includes a fixing rod 1 (9) fixed on the valve stem of valve 1 (6) and a fixing rod 2 (10) fixed on the valve stem of valve 2 (7), and also includes a power mechanism (19) for driving the fixing rod 1 (9) and the fixing rod 2 (10) to rotate synchronously.

3. A raw material additive uniform feeding device as claimed in claim 2, characterized in that: The power mechanism (19) comprises a translation mechanism fixed on the feeding pipe (2), the output end of the translation mechanism is a driving rod (11), both ends of the driving rod (11) are fixed with fixed shafts (12), and the two fixed shafts (12) are respectively slidably connected to the fixed rod 1 (9) and the fixed rod 2 (10).

4. A raw material additive uniform feeding device as claimed in claim 3, characterized in that: The fixing rod 1 (9) and the fixing rod 2 (10) are both provided with elongated holes (13), and the two fixing shafts (12) pass through the two elongated holes (13) respectively.

5. A raw material additive uniform feeding device as claimed in claim 3, characterized in that: The translation mechanism comprises a platform (14) fixedly connected to the feeding pipe (2), the platform (14) is equipped with a bearing seat (15), a screw rod (16) is rotatably connected to the bearing seat (15), the screw rod (16) is threadedly connected to a movable plate (17), and the driving rod (11) is mounted on the movable plate (17).

6. A raw material additive uniform feeding device as claimed in claim 5, characterized in that: The translation mechanism further comprises a track (18) fixedly connected to the platform (14), and the track (18) is slidably connected to the moving plate (17).

7. A raw material additive uniform feeding device according to claim 6, characterized in that: The translation mechanism further includes a power mechanism (19) connected to the end of the screw rod (16).

8. A raw material additive uniform feeding device as claimed in claim 7, characterized in that: A fixed block (20) is fixed in the middle of the driving rod (11), and the fixed block (20) and the driving rod (11) form a cross shape. Four stoppers (21) are fixedly connected to the movable plate (17), and the fixed block (20) is stuck in the four stoppers (21).

9. A raw material additive uniform feeding device according to claim 8, characterized in that: The four stoppers (21) are detachably connected to the baffles (22).

10. A raw material additive uniform feeding device according to claim 9, characterized in that: Two proximity switches (23) are provided on the platform (14).

Images