Method for automatically storing and drying flaky natural rubber and production line layout

Abstract

The invention discloses a method for automatically storing and drying flaky natural rubber and a production line layout. Comprising the following steps: S1, cache arrangement: arranging films which are cut into a certain length size side by side, so that a plurality of films are arranged in a row to facilitate hanging film feeding in the next link; s2, hanging film feeding is conducted, specifically, the multiple arranged films are hung on a rod, and the hung films are transferred to a hanging frame; s3, airing; transferring the hanging rack after hanging to an air-drying warehouse, and carrying out dripping air-drying for a period of time; s4, drying; transferring the air-dried film to a heat pump drying warehouse for drying; s5, taking the sheet and blanking; the dried films are transferred to a finished product discharging section through a finished product cache library to be taken; and S6, packaging. And after taking the film, packaging the finished film. The consistency of product quality and the rate of finished products after sheet rubber is dried are improved, a wind shielding roller shutter is arranged in the heat pump drying warehouse, it is guaranteed that hot air sequentially penetrates through all the hanging frames, and drying uniformity and drying efficiency are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of rubber automated processing, and in particular to a method for automatically storing and drying sheet-shaped natural rubber and a layout of a production line. Background Art

[0002] Natural rubber is classified into smoked sheet rubber, standard rubber, crepe rubber, latex, etc. according to different manufacturing processes and shapes. Smoked sheet rubber is the most representative variety of natural rubber and was once the most widely used variety with the largest consumption. Its main uses are in the production of rubber tires, cables, and conveyor belts. Its production process mainly involves filtration, acid coagulation, sheet pressing, drying, and smoking to produce smoked sheet rubber. Crepe rubber mainly uses latex coagulum or miscellaneous rubber as raw materials, and is made by washing, pressing into a surface with wrinkles, and natural air drying or hot air drying. Crepe rubber is evaluated for its quality based on appearance, chemical composition, physical and mechanical properties, etc., and is divided into three types: white crepe, brown crepe, and black crepe. Each type is further divided into several grades, and there are differences between thin sheets and thick sheets.

[0003] Currently, in the drying process section of sheet-shaped rubber, due to uneven skills of workers, problems such as inadequate supervision during the baking process and poor control of the firepower occur, resulting in under-baked products, residual moisture causing the film to blister and be undercooked, and then causing mildew. Production practice shows that the drying temperature range is a parameter that must be concerned about because both too high and too low temperatures will lead to the production of defective products. For example, in the traditional production process, the pass rate of the finished product of smoked sheet rubber is about 75%, and the pass rate of grades above RSS3 is about 50%. At the same time, due to the low degree of automation in the production process of natural rubber, a large amount of manual labor is required to transfer and control materials throughout the production process. Coupled with the low degree of drying uniformity when drying sheet-shaped rubber at present, it is difficult to ensure the uniformity of product quality, and it often takes a long time to achieve the drying effect.

[0004] Therefore, in order to solve the problems of low degree of automation and low yield in the existing production process of sheet-shaped natural rubber, inability to timely monitor and control the states of various production equipment during the production process, uneven drying, high manual operation intensity, and low production efficiency, it is necessary to develop a method for automatically storing and drying sheet-shaped natural rubber and a layout of a production line. Summary of the Invention

[0005] In order to solve the problems of the prior art, the purpose of the present invention is to provide a method for automatically storing and drying sheet-shaped natural rubber and a layout of a production line, which uses automatic control of warehousing and drying equipment to improve the consistency of product quality and the yield. On the other hand, through full control of the production process, the states of various production equipment can be timely monitored and controlled, reducing the labor intensity of employees and improving production efficiency. The specific content is as follows:

[0006] A method for automatic storage and drying of sheet-shaped natural rubber, comprising the following steps:

[0007] S1, cache arrangement: Arrange the cut films of a certain length side by side to form multiple films in a row, so as to facilitate hanging and feeding in the next step;

[0008] S2, hanging and feeding: Hang the arranged multiple films on a rod and transfer the hung films to a hanging rack;

[0009] S3, air drying: Transfer the hanging rack after hanging the films to an air drying warehouse for dripping and air drying for a certain period of time;

[0010] S4, drying: Transfer the films after air drying to a heat pump drying warehouse for drying;

[0011] S5, taking and discharging: Transfer the dried films to a finished product cache warehouse and then to a finished product discharging section for taking the films;

[0012] S6, packing: After taking the films, pack and package the finished product films.

[0013] Further, the moisture content of the incoming material ≤ 35%; the film thickness is 3 - 12 mm; the moisture content of the films after air drying in step S3 ≤ 15%, the moisture content of the films after drying in step S4 ≤ 1%, the environmental temperature is maintained at 20 - 40 °C during air drying in step S3; the environmental humidity ≤ 80%; the drying temperature is 80 - 90 °C during drying in step S4.

[0014] The production line layout for a method of automatic storage and drying of sheet-shaped natural rubber includes a feeding section, an air drying warehouse, a heat pump drying warehouse, a finished product cache warehouse, and a finished product discharging section. The feeding section conveys the films through a feeding conveyor, and the discharging section conveys the films through a finished product conveyor; the films are hung on a hanging rack in the air drying warehouse, the heat pump drying warehouse, and the finished product cache warehouse; the hanging rack is respectively in rolling connection with the tracks in the air drying warehouse, the finished product cache warehouse, and the heat pump drying warehouse; a shuttle car is provided between the feeding section and the air drying warehouse, between the finished product cache warehouse and the finished product discharging section, between the air drying warehouse and the heat pump drying warehouse, and between the finished product cache warehouse and the heat pump drying warehouse for transporting the hanging rack.

[0015] Further, the feeding section includes a film hanging device, a film hanging robot, a feeding cache conveyor, a rod hanging robot, and a lift; the films enter the feeding end of the film hanging device from the feeding conveyor, and multiple films are arranged side by side above the position where the rod can be lifted and lowered in the conveying channel of the film hanging device; the film hanging robot is respectively connected to the rod hanging interfaces of the film hanging device and the feeding cache conveyor; the rod hanging robot is respectively connected to the rod hanging interfaces of the feeding cache conveyor and the hanging rack arranged on the lift.

[0016] Furthermore, the finished product blanking section includes a lift, a hanging rod robot, and a blanking buffer conveyor; the hanging rod robot is respectively connected to the blanking buffer conveyor and the hanging rod interface of the hanging rack arranged on the lift; the blanking buffer conveyor is connected to the finished product conveyor.

[0017] Furthermore, the heat pump drying storage includes a heat pump device, a pipeline system, a box body, a track, and an external pipeline system; the pipeline system is respectively connected to the heat pump device and the box body; the track is fixedly connected to the inside of the box body; the external pipeline system is respectively connected to the box body and the airing storage.

[0018] Furthermore, the box body of the heat pump drying storage includes a box frame and a partition board; the box frame is arranged and installed inside the box body and is composed of several mutually parallel frame-like structures; the plane where the box frame is located is parallel to the plane where the entrance of the heat pump drying storage is located; the partition board is arranged and installed inside the box body, and its board surface is perpendicular to the plane where the box frame body is located and evenly divides the box body in the width direction; the depth of the partition board is less than the depth of the box body, the outer end head of the partition board is flush with the entrance of the box body, and the inner end head of the partition board keeps a certain distance from the inner end head of the box body; the track is respectively arranged on both sides of the partition board inside the box body, and hanging racks can pass through both sides of the partition board; the connection points between the box body and the pipeline system and the connection points between the box body and the external pipeline system are respectively located on the side walls on both sides of the entrance of the box body.

[0019] Furthermore, it also includes several windproof rolling curtains, which are arranged and installed on the top of the box frame, respectively located on both sides of the partition board and the width of the windproof rolling curtain is less than half of the width of the box frame; the adjacent two windproof rolling curtains on the same side of the partition board are respectively close to the partition board and the box frame; the windproof rolling curtain includes a rolling curtain, a rotating shaft, and a driving device; one end of the rolling curtain is fixedly connected to the rotating shaft, and the driving device is rotationally and fixedly connected to one end of the rotating shaft; after all the hanging racks enter the inside of the box body, the windproof rolling curtain is lowered, and at this time, the positions of the hanging racks and the windproof rolling curtains alternate with each other.

[0020] The rubber materials are cut and arranged side by side. The moisture content of the incoming materials is ≤ 35%; the sheet thickness is 3 - 12 mm. After being conveyed to the loading section by the feeding conveyor, the rubber sheets are hung on the hanging rods by the sheet hanging device 2, and then the hanging rods with the rubber sheets are moved into the feeding buffer conveyor 4 by the sheet hanging robot 3, and then the hanging rods in the feeding buffer conveyor 4 are moved to the hanging rack 10 by the hanging rod robot 5. Then, the shuttle car 9 moves the hanging rack 10 into the drying warehouse 7 to drip-dry the rubber sheets on the hanging rack 10. When drying, the ambient temperature is maintained in the range of 20 - 40°C, the ambient humidity is ≤ 80%, and the moisture content of the dried rubber sheets is ≤ 15%; after that, the shuttle car 9 moves the hanging rack 10 with the drip-dried rubber sheets in the drying warehouse 7 to the heat pump drying warehouse 1 for drying. After the hanging rack 10 is in place in the heat pump drying warehouse 1, the windproof rolling curtain 113 in the heat pump drying warehouse 1 is lowered, and then the heat pump device 12 is started to let the hot air pass through the hanging racks 10 arranged in the heat pump drying warehouse 1 in turn through the pipeline system 13 and then discharge the hot air from the external pipeline system 14. When drying, the drying temperature range is 80 - 90°C, and the moisture content of the dried rubber sheets is ≤ 1%. After drying is completed, the shuttle car 9 moves the hanging rack 10 into the finished product buffer warehouse 8, and after the rubber sheets are unloaded through the finished product unloading section, the rubber sheets are conveyed by the finished product conveyor.

[0021] The present invention has the following beneficial effects compared with the prior art:

[0022] (1) The present invention improves the consistency and yield of the product quality of the sheet rubber after drying, reduces the labor intensity of employees while improving the automation degree and production efficiency of the production line.

[0023] (2) The whole drying process is segmented. A drying warehouse is set to pre-dehydrate the rubber sheets on the hanging rack, initially reducing the moisture content of the rubber sheets and improving the overall drying efficiency.

[0024] (3) By setting a windproof rolling curtain in the heat pump drying warehouse, it is ensured that the hot air passes through each hanging rack in turn, making the rubber sheets heated more evenly during the drying process, improving the drying quality and drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the production line described in the present invention;

[0026] Figure 2 It is a schematic diagram of the connection relationship between the heat pump drying warehouse and the shuttle car described in the present invention;

[0027] Figure 3 It is a three-dimensional structure schematic diagram of the heat pump drying warehouse described in the present invention;

[0028] Figure 4 It is an internal structure schematic diagram of the heat pump drying warehouse described in the present invention;

[0029] Figure 5It is the top view sectional drawing of the heat pump drying storage of the present invention;

[0030] Figure 6 It is the front view sectional drawing of the heat pump drying storage of the present invention.

[0031] In the figure:

[0032] 1 - Heat pump drying storage, 11 - Box body, 111 - Box frame, 112 - Partition board, 113 - Roller shutter,

[0033] 114 - Rotating shaft, 115 - Driving device, 12 - Heat pump device, 13 - Pipeline system, 14 - External pipeline system, 15 - Track;

[0034] 2 - Hanging piece device, 3 - Hanging piece robot, 4 - Buffer conveyor, 5 - Hanging rod robot, 6 - Lift

[0035] 7 - Drying storage, 8 - Finished product buffer storage, 9 - Shuttle car, 10 - Hanging rack. Specific embodiments

[0036] In order to make the technical means, creative features, and achievements of the present invention easy to understand, the following further describes the technical solutions of the invention in combination with one of the embodiments and specific implementation manners of a ground settlement evaluation and early warning control method given by the present invention.

[0037] As Figures 1-6 shown, the specific embodiments given for the invention are as follows:

[0038] A production line layout for an automatic storage and drying method of sheet natural rubber includes a feeding section, a drying storage 7, a heat pump drying storage 1, a finished product buffer storage 8, and a finished product discharging section. The feeding section conveys the rubber sheets through a feeding conveyor, and the discharging section conveys the rubber sheets through a finished product conveyor; the rubber sheets are hung on the hanging racks 10 in the drying storage 7, the heat pump drying storage 1, and the finished product buffer storage 8 by hanging rods; the hanging racks 10 are respectively in rolling connection with the tracks 15 in the drying storage 7, the finished product buffer storage 8, and the heat pump drying storage 1; shuttle cars 9 are arranged between the feeding section and the drying storage 7, the finished product buffer storage 8 and the finished product discharging section, the drying storage 7 and the heat pump drying storage 1, and the finished product buffer storage 8 and the heat pump drying storage 1 for conveying the hanging racks 10.

[0039] The feeding section includes a hanging piece device 2, a hanging piece robot 3, a feeding buffer conveyor 4, a hanging rod robot 5, and a lift 6; the rubber sheets enter the feeding end of the hanging piece device 2 from the feeding conveyor, and multiple rubber sheets are arranged side by side above the position where the hanging rods can move up and down in the conveying channel of the hanging piece device 2; the hanging piece robot 3 is respectively connected to the hanging rod interfaces of the hanging piece device 2 and the feeding buffer conveyor 4; the hanging rod robot 5 is respectively connected to the hanging rod interfaces of the feeding buffer conveyor 4 and the hanging racks 10 arranged on the lift 6.

[0040] The finished product blanking section includes a lift 6, a hanging rod manipulator 5, and a blanking buffer conveyor 4; the hanging rod manipulator 5 is respectively connected to the blanking buffer conveyor 4 and the hanging rod interface of the hanging rack 10 provided on the lift 6; the blanking buffer conveyor 4 is connected to the finished product conveyor.

[0041] The heat pump drying warehouse 1 includes a heat pump device 12, a pipeline system 13, a box body 11, a track 15, and an external pipeline system 14; the pipeline system 13 is respectively connected to the heat pump device 12 and the box body 11; the track 15 is fixedly connected to the inside of the box body 11; the external pipeline system 14 is respectively connected to the box body 11 and the drying warehouse 7.

[0042] The box body 11 of the heat pump drying warehouse 1 includes a box frame 111 and a partition board 112; the box frame 111 is installed inside the box body 11 and is composed of several mutually parallel frame structures; the partition board 112 is installed inside the box body 11, and its plate surface is perpendicular to the plane where the frame body of the box frame 111 is located and evenly divides the box body 11 in the width direction; the depth of the partition board 112 is less than the depth of the box body 11, the outer end of the partition board 112 is flush with the entrance of the box body 11, and the inner end of the partition board 112 is kept at a certain distance from the inner end of the box body 11; tracks 15 are respectively arranged on both sides of the partition board 112 inside the box body 11, and the hanging rack 10 can enter from both sides of the partition board 112; the connection points of the box body 11 with the pipeline system 13 and the external pipeline system 14 are respectively located on the side walls on both sides of the entrance of the box body 11.

[0043] It also includes a number of windproof rolling curtains 113, and the windproof rolling curtains 113 are installed on the top of the box frame 111, respectively located on both sides of the partition board 112 and the width of the windproof rolling curtain 113 is less than half of the width of the box frame 111; the adjacent two windproof rolling curtains 113 on the same side of the partition board 112 are respectively close to the partition board 112 and the box frame 111; the windproof rolling curtain 113 includes a rolling curtain 113, a rotating shaft 114, and a driving device 115; one end of the rolling curtain 113 is fixedly connected to the rotating shaft 114, and the driving device 115 is rotationally fixedly connected to one end of the rotating shaft 114; after the hanging rack 10 completely enters the inside of the box body 11, the windproof rolling curtain 113 is lowered, and at this time, the positions of the hanging rack 10 and the windproof rolling curtain 113 alternate with each other. A transverse windproof board is arranged below the track 15 at the position corresponding to each windproof rolling curtain 113. To prevent hot air from passing through below the track 15

[0044] A method for automatically storing and drying sheet-shaped natural rubber includes the following steps:

[0045] S1, buffer arrangement, rubber material cutting, arrange the films cut to a certain length side by side, so that they become multiple films in a row, so as to facilitate the next link of hanging film loading; the moisture content of the incoming material is ≤35%: the film thickness is 3-12mm; S2, hanging film loading, after being transported to the loading section by the feeding conveyor, the film hanging device 2 hangs the film on the hanging rod, and then the hanging rod with the film is moved to the loading buffer conveyor 4 by the hanging robot 3, and then the hanging rod in the loading buffer conveyor 4 is moved to the hanger 10 by the hanging robot 5. S3, drying, then the shuttle 9 moves the rack 10 to the drying warehouse 7 to drip and dry the film on the rack 10, and the ambient temperature range is maintained at 20-40°C during drying, the ambient humidity is ≤80%, and the moisture content of the film after drying is ≤15%; S4, drying, then the shuttle 9 moves the rack 10 that has been dripped and dried in the drying warehouse 7 to the heat pump drying warehouse 1 for drying. After the rack 10 enters the heat pump drying warehouse 1 and is in place, the windshield roller curtain 113 in the heat pump drying warehouse 1 is lowered, and then the heat pump device 12 is started to pass the hot air through the pipe system 13 to pass through the racks 10 arranged in the heat pump drying warehouse 1, and then the hot air is discharged from the external pipe system 14. The drying temperature range is 80-90°C during drying, and the moisture content of the film after drying is ≤1%. S5, take the film and unload it. After drying, the rack 10 is moved to the finished product buffer 8 by the shuttle 9. After the film is unloaded through the finished product unloading section, it is transported by the finished product conveyor. S6, packing: After taking the film, pack the finished film.

[0046] It should be understood that the above specific embodiments are only used to illustrate or explain the principles of the present invention, and do not constitute a limitation of the present invention. Therefore, any modifications, equivalent substitutions, improvements, etc. made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. The claims attached to the present invention are intended to cover all changes and modifications that fall within the scope and boundaries of the attached claims, or the equivalent forms of such scope and boundaries.

Claims

1. A method for automatic storage and drying of sheet-like natural rubber, characterized in that: The following steps are involved: S1, buffer arrangement, arranging the films cut to a certain length side by side, so that multiple films are arranged in a row, so as to facilitate the next link of hanging film loading; S2, loading the films, hanging the arranged multiple films on the rods, and transferring the hung films to the hanging rack (10); S3, drying; transporting the hanging rack (10) to the drying warehouse (7) for a period of drip drying; S4, drying; transporting the dried film to the heat pump drying warehouse (1) for drying; S5, film unloading; the dried film is transferred to the finished product unloading section through the finished product buffer (8) for film unloading; S6, packaging: After taking the film, the finished film is packaged.

2. The method for automatically storing and drying sheet-like natural rubber according to claim 1, characterized in that: The moisture content of the incoming material is ≤35%; the thickness of the film is 3-12 mm; the moisture content of the film after drying in step S3 is ≤15%, and the moisture content of the film after drying in step S4 is ≤1%. During drying in step S3, the ambient temperature is maintained at 20-40°C; the ambient humidity is ≤80%; and the drying temperature in step S4 is 80-90°C.

3. The production line layout used in the method for automatic storage and drying of sheet-like natural rubber as claimed in claim 2, characterized in that: The invention comprises a loading section, a drying warehouse (7), a heat pump drying warehouse (1), a finished product buffer warehouse (8), and a finished product unloading section. The loading section conveys film through a feed conveyor, and the unloading section conveys film through a finished product conveyor. Film is hung on a hanging rack (10) through hanging rods in the drying warehouse (7), the heat pump drying warehouse (1), and the finished product buffer warehouse (8). The hanging rack (10) is respectively connected to the tracks (15) in the drying warehouse (7), the finished product buffer warehouse (8), and the heat pump drying warehouse (1) in a rolling manner. A shuttle vehicle (9) is provided between the loading section and the drying warehouse (7), the finished product buffer warehouse (8) and the finished product unloading section, the drying warehouse (7) and the heat pump drying warehouse (1), and the finished product buffer warehouse (8) and the heat pump drying warehouse (1) for conveying the hanging rack (10).

4. The production line layout used in the method for automatic storage and drying of sheet-like natural rubber as claimed in claim 3, characterized in that: The loading section comprises a film hanging device (2), a film hanging robot (3), a loading buffer conveyor (4), a hanging rod robot (5), and an elevator (6); the film enters the feeding end of the film hanging device (2) from the feeding conveyor, and is hung on the hanging rod through the film hanging device (2); the film hanging robot (3) is respectively connected to the hanging rod interface of the film hanging device (2) and the loading buffer conveyor (4); the hanging rod robot (5) is respectively connected to the loading buffer conveyor (4) and the hanging rod interface of the hanging bracket (10) arranged on the elevator (6).

5. The production line layout used in the method for automatic storage and drying of sheet-shaped natural rubber as claimed in claim 3, characterized in that: The finished product unloading section comprises an elevator (6), a hanging rod robot (5), and an unloading buffer conveyor (4); the hanging rod robot (5) is respectively connected to the unloading buffer conveyor (4) and a hanging rod interface arranged on a hanging frame (10) on the elevator (6); the unloading buffer conveyor (4) is connected to the finished product conveyor.

6. The production line layout used in the method for automatic storage and drying of sheet-like natural rubber as claimed in claim 3, characterized in that: The heat pump drying storehouse (1) comprises a heat pump device (12), a pipe system (13), a box (11), a track (15), and an external pipe system (14); the pipe system (13) is respectively connected to the heat pump device (12) and the box (11); the track (15) is fixedly connected to the inside of the box (11); and the external pipe system (14) is respectively connected to the box (11) and the drying storehouse (7).

7. The production line layout used in the method for automatic storage and drying of sheet-like natural rubber according to claim 6, characterized in that: The box body (11) of the heat pump drying storehouse (1) comprises a box frame (111) and a partition (112); the box frame (111) is arranged inside the box body (11) and is composed of a plurality of parallel frame structures; the plane where the box frame (111) is located is parallel to the plane where the entrance of the heat pump drying storehouse (1) is located; the partition (112) is arranged inside the box body (11), the plate surface of which is perpendicular to the plane where the box frame (111) is located and divides the box body (11) equally in the width direction; the depth of the partition (112) is less than the width of the partition (112). The depth of the box (11) is such that the outer end of the partition (112) is flush with the inlet of the box (11), and the inner end is kept at a certain distance from the inner end of the box (11); the rails (15) are respectively arranged on both sides of the partition (112) inside the box (11), and the hanger (10) can be accessed on both sides of the partition (112); the connection point between the box (11) and the pipeline system (13) and the connection point with the external pipeline system (14) are respectively located on the side walls on both sides of the inlet of the box (11).

8. The production line layout used in the method for automatic storage and drying of sheet-like natural rubber according to claim 7, characterized in that: The invention also comprises a plurality of wind-shielding roller curtains (113), wherein the wind-shielding roller curtains (113) are arranged and installed on the top of the box frame (111), respectively located on both sides of the partition (112), and the width of the wind-shielding roller curtains (113) is less than half of the width of the box frame (111); two adjacent wind-shielding roller curtains (113) located on the same side of the partition (112) are respectively close to the partition (112) and the box frame (111); the wind-shielding roller curtains (113) comprise roller curtains (113), a rotating shaft (114) and a driving device (115); one end of the roller curtain (113) is fixedly connected to the rotating shaft (114), and the driving device (115) is rotationally fixedly matched with one end of the rotating shaft (114); after the hanging bracket (10) completely enters the interior of the box body (11), the wind-shielding roller curtains (113) are lowered, and at this time, the positions of the hanging bracket (10) and the wind-shielding roller curtains (113) are alternated with each other.

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