Automatic batching, metering and mixing production line for PVC (polyvinyl chloride) preservative film

Abstract

The utility model discloses an automatic batching, metering and mixing production line for PVC (polyvinyl chloride) preservative films, which comprises a PVC powder bin, a plurality of liquid storage tanks, a high-speed mixer, a cooling mixer, a transition bin, a finished product bin and an extruder, a powder quantitative weighing mechanism is arranged at the bottom end of the PVC powder bin and is connected with the high-speed mixer through a second vacuum feeding machine, and the high-speed mixer is connected with the cooling mixer through a second vacuum feeding machine. The bottom of each liquid storage tank is provided with a metering pump, the metering pumps are connected with a high-speed mixer through pipelines, the high-speed mixer is connected with a cooling mixer through a pipeline, the cooling mixer is connected with a transition bin through a pipeline, and the transition bin is connected with a finished product bin through a third vacuum feeding machine. The automatic weighing and batching device is reasonable in design, capable of achieving automatic weighing and batching of PVC preservative film production raw materials, time-saving, labor-saving, capable of avoiding manual weighing errors, capable of continuously and accurately feeding materials for a long time, high in automation degree and suitable for large factories.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC fresh-keeping film production, in particular to an automatic batching, metering and mixing production line for PVC fresh-keeping film. Background Technique

[0002] PVC casting film is one of the most widely used films in the world. Due to its good transparency, flame retardancy, heat sealability, freshness preservation, and good affinity with ink, it can be widely used in the packaging of fruits, vegetables, dairy products, fresh fish and meat products.

[0003] The raw materials of PVC fresh-keeping film are generally composed of PVC powder and four or five liquid additives in a fixed ratio. In today's PVC product production factories, most of them use manual weighing of various raw materials and auxiliary materials. This method was feasible in the era of small factories, but in large factories, such as when the hourly raw material mixing volume exceeds 1000 kilograms, its uneconomical characteristics become prominent. For example:

[0004] 1. A large number of workers are required, and the workers' wages are rising rapidly, and the attention to physical health and other aspects have led to a rapid increase in labor costs;

[0005] 2. Due to the emotional state of the personnel, working in a boring working environment for a long time, it is inevitable to have problems such as inaccurate weighing and wrong mixing, resulting in significant losses.

[0006] Therefore, this solution proposes an automatic batching, metering and mixing production line for PVC fresh-keeping film. Content of the Utility Model

[0007] The utility model provides an automatic batching, metering and mixing production line for PVC fresh-keeping film to solve the problems raised in the above background technique.

[0008] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0009] The automatic batching, metering and mixing production line for PVC fresh-keeping film includes a PVC powder bin, a plurality of liquid storage tanks, a high-speed mixer, a cooling mixer, a transition bin, a finished product bin, and an extruder. A powder quantitative weighing mechanism is provided at the bottom of the PVC powder bin, and the powder quantitative weighing mechanism is connected to the high-speed mixer through a second vacuum feeding machine. Quantitative pumps are provided at the bottoms of the plurality of liquid storage tanks, and the plurality of quantitative pumps are all connected to the high-speed mixer through pipelines. The high-speed mixer is connected to the cooling mixer through a pipeline. The cooling mixer is connected to a transition bin through a pipeline. The transition bin is connected to the finished product bin through a third vacuum feeding machine. The finished product bin is connected to the feeding end of the extruder through a fourth vacuum feeding machine.

[0010] Preferably, the powder quantitative weighing mechanism includes a fixed box, a weighing sensor is provided on the inner bottom side wall of the fixed box, a weighing box is placed on the weighing sensor, the top of the fixed box is fixedly connected with a feed pipe, the feed pipe is located above the weighing box, a solenoid valve is provided on the feed pipe, the upper end of the feed pipe is connected to a PVC powder bin through a pipeline, a suction pipe is fixedly connected to the side wall of the fixed box, one end of the suction pipe extends into the inner central bottom side wall of the weighing box, and the other end of the suction pipe is connected to a second vacuum feeding machine through a pipeline.

[0011] Preferably, the bottom of the weighing box is arranged in an inverted conical shape.

[0012] Preferably, the PVC powder bin is connected to an inverted bag bin through a first vacuum feeding machine.

[0013] Preferably, it further includes a central controller, and the first vacuum feeding machine, the second vacuum feeding machine, the metering pump, the third vacuum feeding machine, the fourth vacuum feeding machine, the solenoid valve, and the weighing sensor are all electrically connected to the central controller.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] The device is reasonably designed, can realize the automatic weighing and batching of the raw materials for producing PVC fresh-keeping film, is not only more time-saving and labor-saving, avoids manual weighing errors, but also can continuously supply materials accurately for a long time, has a high degree of automation, and is suitable for large factories.

[0016] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly and implement it in accordance with the content of the description, the following takes the preferred embodiments of the present utility model and combines with the attached drawings to describe in detail as follows. The specific implementation manners of the present utility model are given in detail by the following embodiments and their attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The attached drawings described herein are used to provide a further understanding of the present utility model, constitute a part of this application, and the schematic embodiments of the present utility model and their descriptions are used to explain the present utility model and do not constitute an improper limitation to the present utility model. In the attached drawings:

[0018] Figure 1 is a schematic structural diagram of an automatic batching, metering and mixing production line for PVC fresh-keeping film proposed by the present utility model;

[0019] Figure 2 is an internal sectional structural diagram of the powder quantitative weighing mechanism in the present utility model.

[0020] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0021] 1. First vacuum feeding machine; 2. Bag - emptying bin; 3. Powder quantitative weighing mechanism; 4. Liquid storage tank; 5. Dosing pump; 6. High - speed mixer; 7. Cooling mixer; 8. Transition bin; 9. Third vacuum feeding machine; 10. Second vacuum feeding machine; 11. Finished product bin; 12. Fourth vacuum feeding machine; 13. Extruder; 14. PVC powder bin; 301. Fixed box; 302. Feed pipe; 303. Solenoid valve; 304. Suction pipe; 305. Weighing box; 306. Weighing sensor. Detailed implementation manners

[0022] The principles and features of the present utility model will be described below in conjunction with the accompanying drawings. The examples given are only for explaining the present utility model and are not intended to limit the scope of the present utility model. In the following paragraphs, the present utility model will be described more specifically by way of example with reference to the accompanying drawings. It should be noted that the accompanying drawings are all in very simplified forms and use non - precise scales, only for the purpose of facilitating and clearly assisting in explaining the objectives of the embodiments of the present utility model.

[0023] It should be noted that when a component is referred to as being "fixed to" another component, it can be directly on the other component or there can also be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component at the same time. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0025] Please refer to Figures 1 - 2, in the embodiment of the present utility model, an automatic batching, metering and mixing production line for PVC fresh-keeping film includes a PVC powder bin 14, a plurality of liquid storage tanks 4, a high-speed mixer 6, a cooling mixer 7, a transition bin 8, a finished product bin 11, and an extruder 13. A powder quantitative weighing mechanism 3 is provided at the bottom end of the PVC powder bin 14. The powder quantitative weighing mechanism 3 is connected to the high-speed mixer 6 through a second vacuum feeder 10. Different liquid additives are stored in the plurality of liquid storage tanks 4 respectively. Dosing pumps 5 are provided at the bottoms of the plurality of liquid storage tanks 4. The plurality of dosing pumps 5 are all connected to the high-speed mixer 6 through pipelines. The high-speed mixer 6 is connected to the cooling mixer 7 through a pipeline. The cooling mixer 7 is connected to a transition bin 8 through a pipeline. The transition bin 8 is connected to the finished product bin 11 through a third vacuum feeder 9. The finished product bin 11 is connected to the feeding end of the extruder 13 through a fourth vacuum feeder 12.

[0026] Specifically, the powder quantitative weighing mechanism 3 includes a fixed box 301. A weighing sensor 306 is provided on the inner bottom side wall of the fixed box 301. A weighing box 305 is placed on the weighing sensor 306. The bottom of the weighing box 305 is arranged in an inverted conical shape. The top of the fixed box 301 is fixedly connected with a feeding pipe 302. The feeding pipe 302 is located above the weighing box 305. An electromagnetic valve 303 is provided on the feeding pipe 302. The upper end of the feeding pipe 302 is connected to the PVC powder bin 14 through a pipeline. A suction pipe 304 is fixedly connected to the side wall of the fixed box 301. One end of the suction pipe 304 extends into the central bottom side wall inside the weighing box 305. The other end of the suction pipe 304 is connected to the second vacuum feeder 10 through a pipeline. When it is necessary to automatically weigh the weight of the PVC powder, the electromagnetic valve 303 can be controlled to start, so that the PVC powder in the PVC powder bin 14 enters the weighing box 305 through the feeding pipe 302. At this time, the central controller can monitor the weight of the PVC powder entering the weighing box 305 through the weighing sensor 306. When the PVC powder in the weighing box 305 reaches the specified weight, the central controller can close the electromagnetic valve 303 again, and then control the second vacuum feeder 10, so that the suction pipe 304 conveys the PVC powder in the weighing box 305 to the high-speed mixer 6 through the second vacuum feeder 10 for mixing.

[0027] Specifically, the PVC powder bin 14 is connected to an inverted bag bin 2 through a first vacuum feeder 1. Because the PVC powder bin 14 is large in volume and high, workers can put the powder bags filled with PVC powder into the lower inverted bag bin 2, and then start the first vacuum feeder 1, so that the PVC powder can be more conveniently conveyed into the PVC powder bin 14.

[0028] The present invention further includes a central controller (not shown). The first vacuum feeder 1, the second vacuum feeder 10, the dosing pump 5, the third vacuum feeder 9, the fourth vacuum feeder 12, the electromagnetic valve 303, and the weighing sensor 306 are all electrically connected to the central controller.

[0029] The working principle of the present utility model is as follows:

[0030] According to the set batching ratio, first, the controllable solenoid valve 303 is started, so that the PVC powder in the PVC powder bin 14 enters the weighing box 305 through the feed pipe 302. At this time, the central controller can monitor the weight of the PVC powder entering the weighing box 305 through the weighing sensor 306. When the PVC powder in the weighing box 305 reaches the specified weight, the solenoid valve 303 is closed. Then, the second vacuum feeding machine 10 is controlled to make the suction pipe 304 convey the PVC powder in the weighing box 305 to the high-speed mixer 6 through the second vacuum feeding machine 10 for mixing. Multiple metering pumps 5 can be controlled respectively to convey different liquid additives in multiple storage tanks 4 to the high-speed mixer 6 at specified weights. The high-speed mixer 6 can fully stir and mix the materials at high temperature. When the temperature in the high-speed mixer 6 reaches the discharging temperature, the high-speed mixer 6 discharges the materials into the cooling mixer 7 for cooling and stirring. After the materials are cooled to the process temperature, the cooling mixer 7 discharges the materials into the transition bin 8. Then, the materials in the cooling mixer 7 are conveyed to the finished product bin 11 through the third vacuum feeding machine 9. Finally, the finished product bin 11 conveys the materials to the hopper of the extruder 13 through the fourth vacuum feeding machine 12 for extrusion and discharging.

[0031] The above is only the preferred embodiment of the present utility model, and it is not intended to limit the present utility model in any form; any ordinary technician in the industry can smoothly implement the present utility model according to the instructions in the attached drawings and the above description; however, any equivalent changes such as slight modifications, refinements, and evolutions made by those skilled in the art within the scope of the technical solution of the present utility model by using the technical content disclosed above are all equivalent embodiments of the present utility model; at the same time, any equivalent changes, modifications, and evolutions made to the above embodiments based on the essential technology of the present utility model still fall within the protection scope of the technical solution of the present utility model.

Claims

1. PVC cling film automatic batching and metering mixing production line, characterized in that: The invention comprises a PVC powder silo (14), a plurality of liquid storage tanks (4), a high-speed mixer (6), a cooling mixer (7), a transition silo (8), a finished product silo (11), and an extruder (13). The bottom of the PVC powder silo (14) is provided with a powder quantitative weighing mechanism (3), the powder quantitative weighing mechanism (3) is connected to the high-speed mixer (6) through a second vacuum feeder (10), the bottoms of the plurality of liquid storage tanks (4) are provided with quantitative pumps (5), the plurality of quantitative pumps (5) are connected to the high-speed mixer (6) through pipelines, the high-speed mixer (6) is connected to the cooling mixer (7) through pipelines, the cooling mixer (7) is connected to the transition silo (8) through pipelines, the transition silo (8) is connected to the finished product silo (11) through a third vacuum feeder (9), and the finished product silo (11) is connected to the feeding end of the extruder (13) through a fourth vacuum feeder (12).

2. The automatic batching and metering mixing production line for PVC cling film according to claim 1 is characterized in that: The powder quantitative weighing mechanism (3) comprises a fixed box (301), a weighing sensor (306) is provided on the inner bottom side wall of the fixed box (301), a weighing box (305) is placed on the weighing sensor (306), a feeding pipe (302) is fixedly connected to the top of the fixed box (301), the feeding pipe (302) is located above the weighing box (305), a solenoid valve (303) is provided on the feeding pipe (302), the upper end of the feeding pipe (302) is connected to the PVC powder bin (14) through a pipeline, a suction pipe (304) is fixedly connected to the side wall of the fixed box (301), one end of the suction pipe (304) extends into the inner central bottom side wall of the weighing box (305), and the other end of the suction pipe (304) is connected to the second vacuum feeder (10) through a pipeline.

3. The automatic batching and metering mixing production line for PVC cling film according to claim 2 is characterized in that: The bottom of the weighing box (305) is in an inverted cone shape.

4. The automatic batching and metering mixing production line for PVC cling film according to claim 3 is characterized in that: The PVC powder material bin (14) is connected to the bag dumping bin (2) via a first vacuum feeder (1).

5. The automatic batching and metering mixing production line for PVC cling film according to claim 4 is characterized in that: It also includes a central controller, and the first vacuum loader (1), the second vacuum loader (10), the metering pump (5), the third vacuum loader (9), the fourth vacuum loader (12), the solenoid valve (303), and the weighing sensor (306) are all electrically connected to the central controller.

Images