A latex sheet production line

Abstract

The present invention discloses a latex sheet production line, belonging to the technical field of latex products, which includes a conveying device for conveying latex forward, including a conveying curtain for supporting the latex, a power roller and a supporting roller; a material spreading device including a material spreading pipe; a thickness limiting device including a triangular curtain; a steaming and vulcanizing device including a steam pipe and a steaming and sulfurizing box, and the latex forms a latex sheet after passing through the steaming and sulfurizing box; a side baffle device including a winding motor, a driving shaft, a driven shaft and a baffle belt wound around the driving shaft and the driven shaft, and the baffle belt is perpendicular to the conveying curtain and is used to prevent the latex on the conveying curtain from overflowing. The present invention can automatically adjust the thickness of the latex layer, the triangular curtain of the thickness limiting device can rotate, which is convenient for cleaning the curtain cloth or cleaning; the height of the baffle belt and the distance between the two baffle belts can be adjusted to adapt to the production of latex sheets with different widths and different thicknesses; realize the automatic production of the whole production line, reduce labor, save costs and improve efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of latex product production, and particularly relates to a latex sheet production line. Background Art

[0002] At present, there are two mainstream latex production processes in the world: the Dunlop process and the Talalay process. And now most factories cannot do without the Dunlop process. The basic process flow of Dunlop for the latex sheet production line is as follows: 1) mixing and stirring for foaming, 2) injecting glue, 3) steaming and vulcanizing, 4) cooling, 5) cleaning, 6) dewatering, 7) drying, 8) punching, 9) cutting. Generally, a belt-type conveyor line is adopted, and each process is manually operated, which has the problems of time-consuming, laborious and low efficiency. At the same time, the thickness and width of the latex are not easy to be shaped during the steaming and vulcanizing process, which affects the production quality of the latex sheet. Summary of the Invention

[0003] Technical Problem: Aiming at the above problems existing in the prior art, the technical problem to be solved by the present invention is to provide a latex sheet production line to improve the production efficiency and production quality of the latex sheet.

[0004] Technical Solution: To solve the above technical problem, the technical solution adopted by the present invention is as follows: A latex sheet production line, comprising:

[0005] A conveying device for conveying latex forward, including a conveying curtain for supporting the latex, a power roller and a supporting roller for driving the conveying curtain to move forward continuously;

[0006] A material spreading device, including a material spreading pipe for spraying latex on the conveying curtain;

[0007] A thickness limiting device, including a triangular curtain arranged above the conveying curtain for limiting the thickness of the latex on the conveying curtain;

[0008] A steaming and vulcanizing device, including a steam pipe arranged below the conveying curtain and a steaming and sulfurizing box covering above the conveying curtain for vulcanizing the latex. After passing through the steaming and sulfurizing box, the latex forms a latex sheet;

[0009] A side blocking device, with one arranged on each side of the conveying curtain, including a winding motor, a driving shaft, a driven shaft and a blocking belt wound around the driving shaft and the driven shaft. The blocking belt is perpendicular to the conveying curtain for blocking the latex on the conveying curtain from overflowing.

[0010] Preferably, the edge stop device further includes a strip plate, both the driving shaft and the driven shaft are arranged on the strip plate, the edge stop device further includes a left - right adjusting device for driving the strip plate to move left and right, the left - right adjusting device includes a left - right adjusting motor, a lead screw connected to the left - right adjusting motor, and a sliding table movably connected to the lead screw, and the sliding table is connected to the strip plate.

[0011] Preferably, the sliding table is connected to the strip plate through an up - down adjusting device, the up - down adjusting device includes a bottom plate fixedly connected to the strip plate, a threaded rod connected to the bottom plate, a fixed seat threadedly connected to the threaded rod, and a hand wheel arranged at the top of the threaded rod, and the fixed seat is connected to the sliding table.

[0012] Preferably, the forward speed of the belt stop is the same as the forward speed of the conveying curtain, and a counter is arranged on the edge stop device.

[0013] Preferably, the thickness limiting device further includes a height adjusting device for driving the triangular curtain to move up and down, the height adjusting device includes a tensioning roller, a tensioning rod, a first connecting plate, a second connecting plate, a height rod, a reversing box, a transmission rod, and a height adjusting motor. The tensioning roller and the tensioning rod are used to tension the triangular curtain. One end of the tensioning roller and one end of the tensioning rod are connected to the first connecting plate, and the other end of the tensioning roller and the other end of the tensioning rod are connected to the second connecting plate. The height adjusting motor is connected to the transmission rod, and one reversing box is arranged at each end of the transmission rod. One reversing box is connected to the first connecting plate through a height rod, and the other reversing box is connected to the second connecting plate through a height rod.

[0014] Preferably, the thickness limiting device further includes a rotating mechanism for rotating the triangular curtain, the rotating mechanism includes a rotating motor and a chain. The tensioning roller includes a first tensioning roller and a second tensioning roller connected to the first tensioning roller through a chain, and the rotating motor is connected to the first tensioning roller.

[0015] Preferably, the material spreading device further includes a reciprocating mechanism, the reciprocating mechanism includes a reciprocating motor, a first synchronous pulley connected to the reciprocating motor, a belt loop connected to the first synchronous pulley, and a second synchronous pulley connected to the belt loop, and the material spreading pipe is connected to the belt loop.

[0016] Preferably, the latex sheet production line further includes:

[0017] A foaming machine, connected to the material spreading pipe for supplying latex to the material spreading pipe;

[0018] A cooling and cleaning tank, used for cooling and cleaning the latex sheet after vulcanization in the steaming and sulfurizing tank;

[0019] A dehydration drying box, used for drying the latex sheets coming out of the cooling and washing box;

[0020] Punching box, used to punch holes in the dried latex sheet;

[0021] Cutter, used to cut the punched latex sheet.

[0022] Beneficial effects: Compared with the prior art, the present invention has the following advantages:

[0023] 1. By setting a thickness limiting device, and a height adjusting device on the thickness limiting device, the thickness of the latex layer can be automatically adjusted to meet the production needs of latex sheets of different thicknesses. The triangular curtain of the thickness limiting device can be rotated to facilitate the cleaning or washing of the curtain cloth;

[0024] 2. A side guard device is arranged on the conveying curtain. The side guard device runs through the entire cooking and vulcanization device. During the cooking and vulcanization process of the latex layer, the width of the latex layer is limited. The forward speed of the side guard belt is the same as that of the conveying curtain to ensure that the side of the latex layer is not torn, thereby improving the quality of the latex sheet product. The height of the side guard belt and the distance between the two side guard belts are adjustable to adapt to the production of latex sheets of different widths and thicknesses;

[0025] 3. Each process of the production line can be operated individually or the whole line can be operated in linkage to realize the automated production of the entire production line, reduce labor, save costs and improve efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the structure of the production line of the present invention;

[0027] Figure 2 It is a schematic diagram of the structure of the material spreading device, the thickness limiting device and the steaming and vulcanizing device of the present invention;

[0028] Figure 3 yes Figure 2 Enlarged view of some areas;

[0029] Figure 4 yes Figure 3 Enlarged view of point A in the middle;

[0030] Figure 5 yes Figure 3 Enlarged view of point B in the middle;

[0031] Figure 6 is a schematic diagram of the structure of the height adjustment device;

[0032] Figure 7 It is a schematic diagram of the structure of the sidewall device;

[0033] Figure 8 yes Figure 7 Enlarged view of some areas;

[0034] Figure 9 It is a schematic structural diagram of another angle of the edge retaining device;

[0035] Figure 10 is Figure 9 An enlarged view of a partial area;

[0036] Figure 11 It is a schematic structural diagram of the length meter. Specific embodiments

[0037] The following will further clarify the present invention in conjunction with specific embodiments. The embodiments are implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and not to limit the scope of the present invention.

[0038] As Figure 1 shown, a latex sheet production line adopts the Dunlop process: 1. Mixing and stirring, 2. Injecting glue, 3. Cooking and vulcanizing, 4. Cooling, 5. Cleaning, 6. Dehydrating, 7. Drying, 8. Punching, 9. Cutting. The latex after mixing and stirring and foaming exits from the foaming machine 91, and the latex is spread on the conveying curtain 11 of the conveying device through the spreading pipe 21 of the spreading device. The conveying device uses an existing mesh belt conveyor to continuously convey the latex forward. The conveying device includes a conveying curtain 11, a driving roller 12, a supporting roller 13 and a driven roller 14. The conveying curtain 11 is used to support the latex and drive the latex forward. The driving roller 12 is connected to a driving motor to provide forward power. The driven roller 14 is located on the same horizontal plane as the driving roller 12 and at the front end of the inner circle of the conveying curtain 11. The driven roller 14 rotates following the conveying curtain 11. The working area of the conveying curtain 11 is between the conveying curtain 11 and the driving roller 12. Two supporting rollers 13 are provided to tension the conveying curtain 11.

[0039] A thickness limiting device is provided in front of the spreading pipe 21. The thickness limiting device includes a triangular curtain 31. The triangular curtain 31 is arranged above the conveying curtain 11 and has a certain distance from the conveying curtain 11. The thickness of the latex is limited after passing through the triangular curtain 31, thereby forming a latex layer 8.

[0040] The latex layer 8 continues to move forward on the conveying curtain 11 and enters the cooking and vulcanizing device. The cooking and vulcanizing device includes a steam pipe 41 and a steaming and vulcanizing box 42. The steam pipe 41 is arranged below the conveying curtain 11 to cook the latex above the conveying curtain 11. The steaming and vulcanizing box 42 covers the conveying curtain 11 above. The steaming and vulcanizing box 42 is continuously heated by the steam pipe 41, and the temperature is 110 - 120 °C. There is a vulcanizing blower 421 in the steaming and vulcanizing box 42 to blow air through the blower pipe. There are multiple rows of air outlet holes on the blower pipe to blow air and heat the latex layer 8 during transmission on the conveying curtain 11, thereby realizing the cooking and vulcanizing of the latex layer 8. The conveying curtain 11 is relatively long, and the cooking and vulcanizing time is about 15 minutes. After the latex layer 8 passes through the steaming and vulcanizing box 42, a latex sheet 81 is formed.

[0041] A retaining edge device is also provided on the conveying device. One retaining edge device is respectively arranged on both sides of the conveying curtain 11. It includes a driving shaft 51, a driven shaft 52 and a retaining belt 53. The driving shaft 51 is arranged at the front end, the driven shaft 52 is arranged at the rear end, and the retaining belt 53 is wound around the driving shaft 51 and the driven shaft 52. The retaining belt 53 is arranged perpendicular to the conveying curtain 11 and is used to prevent the latex on the conveying curtain 11 from overflowing from both sides. Driven by the driving shaft 51, the forward speed of the retaining belt 53 is the same as that of the conveying curtain 11, ensuring that the latex layer 8 is well shaped in the vulcanizing box 42 and not torn, thus ensuring the quality of the sheet product.

[0042] After coming out of the vulcanizing box 42, it enters the cooling and cleaning box 92. There is circulating water in the cooling and cleaning box 92. After continuous soaking and rinsing and cooling by the circulating water, it enters the dehydration and drying box 93. There are multiple sets of pressure rollers 96 and drying fans 931 in the dehydration and drying box 93. While the latex sheet 81 is dehydrated by the pressure rollers 96, it is continuously dried by the hot air of the drying fan 931. Then it enters the punching box 94. The punching box 94 mainly consists of a press with a punching die. The punching die includes an upper die 941 and a lower die 942. There are many punching nails on the upper die 941, and nail holes are provided at the corresponding positions on the lower die 942. The latex sheet 81 is in the middle of the upper and lower dies, so that the required nail hole size and nail hole pattern can be processed on the latex sheet 81. The punching die needs to be made according to the requirements of the customer. After coming out of the punching box 94, it enters the cutting area, and the latex sheet 81 clamped by the pressure rollers is cut by the cutting knife 95. The cutting length is determined according to the specifications of the latex sheet 81, and then it is packed and stored in the warehouse.

[0043] As Figure 2 、 Figure 3 、 Figure 8 and Figure 9 shown, the material spreading device also includes a reciprocating mechanism, which is used to drive the material spreading pipe 21 to move back and forth left and right on the conveying curtain 11 for uniform material spreading. The reciprocating mechanism includes a reciprocating motor 221, a first synchronous pulley 222, a second synchronous pulley 224 and a belt loop 223. The belt loop 223 is sleeved on the first synchronous pulley 222 and the second synchronous pulley 224. The second synchronous pulley 224 is connected to the first synchronous pulley 222 through the belt loop 223. The first synchronous pulley 222 is connected to the reciprocating motor 221. Driven by the reciprocating motor 221, the belt loop 223 rotates back and forth. The material spreading pipe 21 is connected to the belt loop 223 through a material spreading sliding table 211 and moves back and forth left and right under the drive of the belt loop 223, so as to evenly spread the latex on the conveying curtain 11. A first cross beam frame 18 is provided on the conveying device. The first cross beam frame 18 straddles the conveying curtain 11, and the reciprocating mechanism is arranged on the first cross beam frame 18. After the material spreading pipe 21 spreads the material on the conveying curtain 11, in order to prevent the latex from overflowing from both sides of the conveying curtain 11, baffles 23 are also provided on both sides to block the latex.

[0044] As Figure 3 、Figure 4 , Figure 5 and Figure 6 As shown in Figure 4 , Figure 5 and Figure 6 , the thickness limiting device further includes a height adjusting device. The height adjusting device is used to drive the triangular curtain 31 to move up and down. The height adjusting device includes a tensioning roller, a tensioning rod 322, a first connecting plate 323, a second connecting plate 324, a height rod 328, a reversing box 325, a transmission rod 326 and a height adjusting motor 327. The tensioning roller and the tensioning rod 322 pass through the circle formed by the triangular curtain 31 to tension the curtain cloth of the triangular curtain 31. The tensioning roller includes a first tensioning roller 3211 and a second tensioning roller 3212. One end of the tensioning roller and one end of the tensioning rod 322 are connected to the first connecting plate 323, and the other end of the tensioning roller and the other end of the tensioning rod 322 are connected to the second connecting plate 324. The two height rods 328 are movably connected to the two connecting plates by threaded connection respectively. The first connecting plate 323 is movably connected to a reversing box 325 through a height rod 328, and the second connecting plate 324 is movably connected to another reversing box 325 through the other height rod 328. The height adjusting motor 327 drives the transmission rod 326 to rotate. The two reversing boxes 325 are arranged at both ends of the transmission rod 326. There are two bevel gears 3251 in the reversing box 325. One bevel gear 3251 is arranged on the transmission rod 326, and the other bevel gear 3251 is arranged at the top of the height rod 328. The two bevel gears 3251 are at 90°. The rotation of the transmission rod 326 drives the height rod 328 to rotate by itself. Since the height rod 328 is threadedly connected to the two connecting plates, the two connecting plates are driven to rise or fall, so that the first connecting plate 323 and the second connecting plate 324 can be driven to rise or fall together by the height adjusting motor 327, thereby driving the tensioning roller and the tensioning rod 322 to move up and down, and further adjusting the height of the triangular curtain 31.

[0045] As Figure 3 , Figure 4 and Figure 5 As shown in Figure 3 , Figure 4 and Figure 5 , the thickness limiting device further includes a rotating mechanism 33. The rotating mechanism 33 is used to rotate the triangular curtain 31 to achieve the purpose of clearing materials or cleaning the triangular curtain. The rotating mechanism 33 includes a rotating motor 331 and a chain 332. The second tensioning roller 3212 is connected to the first tensioning roller 3211 through the chain 332. The rotating motor 331 is connected to the first tensioning roller 3211. Since the triangular curtain 31 is a circular body formed by rolling the curtain cloth, the first tensioning roller 3211 drives the curtain cloth of the triangular curtain 31 to rotate under the drive of the rotating motor 331, which is convenient for driving the latex material at the lower end of the curtain cloth to the upper end to clear the materials and is convenient for cleaning the curtain cloth.

[0046] As Figure 2 , Figure 7 , Figure 8 , Figure 9 and Figure 10As shown, the edge retaining device further includes a winding motor 50 and a strip plate 54. The strip plate 54 is made of I-shaped fiberglass and is arranged along the advancing direction of the latex layer 8 on the edge of the conveying curtain 11. The winding motor 50 is connected to the driving shaft 51 to drive the driving shaft 51 to rotate. Both the driving shaft 51 and the driven shaft 52 are arranged on the strip plate 54. The retaining belt 53 is outside the strip plate 54. The edge retaining device further includes a left and right adjusting device for driving the strip plate 54 to move left and right. There are two left and right adjusting devices. The conveying device is also provided with a second cross beam frame 19, which is arranged across above the front end of the conveying curtain 11. One left and right adjusting device is respectively arranged on the first cross beam frame 18 and the second cross beam frame 19, so as to drive the strip plate 54 to move left and right from both ends of the strip plate 54, ensuring that both ends of the strip plate 54 can move left and right synchronously; The left and right adjusting device adopts a single-axis sliding table, including a left and right adjusting motor 551, a lead screw 552 and a sliding table 553. When the left and right adjusting motor 551 drives the lead screw 552, the sliding table 553 can slide left and right, driving the strip plate 54 to slide left and right.

[0047] As Figure 7 , Figure 8 and Figure 9 shown, the sliding table 553 is connected to the strip plate 54 through an up and down adjusting device. The up and down adjusting device includes a bottom plate 561, a threaded rod 562, a fixed seat 563 and a handwheel 564. The bottom plate 561 is fixedly connected to the strip plate 54. The lower end of the threaded rod 562 is connected to the bottom plate 561. The fixed seat 563 is fixedly connected to the sliding table 553. The threaded rod 562 passes through the fixed seat 563. The handwheel 564 is provided with a threaded hole corresponding to the threaded rod 562. Rotating the handwheel 564 can drive the threaded rod 562 to move up and down relative to the fixed seat 563, thereby driving the bottom plate 561 and the strip plate 54 connected to the bottom plate 561 to move up and down. Guide rods are symmetrically arranged on both sides of the threaded rod 562 on the bottom plate 561 to prevent the bottom plate 561 from shifting. The two up and down adjusting devices can finely adjust the height of the strip plate 54 at both ends of the strip plate 54, thereby adjusting the distance between the retaining belt 53 and the conveying curtain 11, so that the retaining belt 53 can adapt to latex layers 8 of different heights.

[0048] As Figure 11 shown, a length meter 57 is provided on the edge retaining device. The length meter 57 adopts an existing wheel type length meter, and its roller is attached to the retaining belt 53. Since the advancing speed of the retaining belt 53 is the same as that of the conveying curtain 11, the production length of the latex sheet can be recorded through the retaining belt 53.

[0049] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A latex sheet production line, characterized in that, it includes: A conveying device for conveying latex forward, including a conveying curtain (11) for supporting the latex, a power roller (12) and a supporting roller (13) for driving the conveying curtain (11) to continuously move forward; A material spreading device, including a material spreading pipe (21), and the material spreading pipe (21) is used for spraying latex on the conveying curtain (11); A thickness limiting device, including a triangular curtain (31), and the triangular curtain (31) is arranged above the conveying curtain (11) for limiting the thickness of the latex on the conveying curtain (11); A steaming and vulcanizing device, including a steam pipe (41) arranged below the conveying curtain (11) and a steaming and sulfurizing box (42) covering above the conveying curtain (11) for vulcanizing the latex, and the latex forms a latex sheet after passing through the steaming and sulfurizing box (42); Edge blocking devices, one is arranged on each side of the conveying curtain (11), including a winding motor (50), a driving shaft (51), a driven shaft (52) and a blocking belt (53) wound on the driving shaft (51) and the driven shaft (52), and the blocking belt (53) is perpendicular to the conveying curtain (11) for blocking the overflow of the latex on the conveying curtain (11); The thickness limiting device further includes a height adjusting device for driving the triangular curtain (31) to move up and down. The height adjusting device includes a tensioning roller (321), a tensioning rod (322), a first connecting plate (323), a second connecting plate (324), a height rod (328), a reversing box (325), a transmission rod (326) and a height adjusting motor (327). The tensioning roller (321) and the tensioning rod (322) are used for tensioning the triangular curtain (31). One end of the tensioning roller (321) and one end of the tensioning rod (322) are connected to the first connecting plate (323), and the other end of the tensioning roller (321) and the other end of the tensioning rod (322) are connected to the second connecting plate (324). The height adjusting motor (327) is connected to the transmission rod (326). One reversing box (325) is arranged at each end of the transmission rod (326). One of the reversing boxes (325) is connected to the first connecting plate (323) through the height rod (328), and the other reversing box (325) is connected to the second connecting plate (324) through the height rod (328); The thickness limiting device further includes a rotating mechanism (33) for rotating the triangular curtain (31). The rotating mechanism (33) is used to drive the latex material at the lower end of the curtain cloth of the triangular curtain (31) to the upper end for cleaning the material and facilitating the cleaning of the curtain cloth. The rotating mechanism (33) includes a rotating motor (331) and a chain (332). The tensioning roller (321) includes a first tensioning roller (3211) and a second tensioning roller (3212) connected to the first tensioning roller (3211) through the chain (332), and the rotating motor (331) is connected to the first tensioning roller (3211); 2. The latex sheet production line according to claim 1, characterized in that, The edge retaining device further includes a strip plate (54), the driving shaft (51) and the driven shaft (52) are both arranged on the strip plate (54), the edge retaining device further includes a left - right adjusting device for driving the strip plate (54) to move left and right, the left - right adjusting device includes a left - right adjusting motor (551), a lead screw (552) connected to the left - right adjusting motor (551), and a sliding table (553) movably connected to the lead screw (552), and the sliding table (553) is connected to the strip plate (54).

3. The latex sheet production line according to claim 2, wherein, the sliding table (553) is connected to the strip plate (54) through an up - down adjusting device, the up - down adjusting device includes a bottom plate (561) fixedly connected to the strip plate (54), a threaded rod (562) connected to the bottom plate (561), a fixed seat (563) threadedly connected to the threaded rod (562), and a hand wheel (564) arranged at the top of the threaded rod (562), and the fixed seat (563) is connected to the sliding table (553).

4. The latex sheet production line according to claim 2, wherein, the forward speed of the retaining belt (53) is the same as the forward speed of the conveying curtain (11), and a counter (57) is arranged on the edge retaining device.

5. The latex sheet production line according to claim 1, wherein, the material spreading device further includes a reciprocating mechanism, the reciprocating mechanism includes a reciprocating motor (221), a first synchronous pulley (222) connected to the reciprocating motor (221), a belt loop (223) connected to the first synchronous pulley (222), and a second synchronous pulley (224) connected to the belt loop (223), and the material spreading pipe (21) is connected to the belt loop (223).

6. The latex sheet production line according to claim 1, wherein, the latex sheet production line further includes: a foaming machine (91), connected to the material spreading pipe (21) for supplying latex to the material spreading pipe (21); a cooling and cleaning tank (92), used for cooling and cleaning the latex sheet after vulcanization in the vulcanizing tank (42); a dehydration and drying oven (93), used for drying the latex sheet coming out of the cooling and cleaning tank (92); a punching box (94), used for punching the dried latex sheet; a cutter (95), used for cutting the punched latex sheet.

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