CN113215331A

CN113215331A - Method and device for drying oil-edge leather

Info

Publication number: CN113215331A
Application number: CN202110591420.1A
Authority: CN
Inventors: 石光见
Original assignee: Nanyue Kapok Guangzhou Industrial Co ltd
Current assignee: Nanyue Kapok Guangzhou Industrial Co ltd
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-08-06

Abstract

The invention discloses a method and a device for drying oil-edged leather. The method comprises the following steps: the feathered leather moves along a conveying path and is dried by air having a gradually increased temperature. The device comprises a heat insulation shell and a driving device, wherein an annular conveying mechanism linked with the driving device is arranged in the heat insulation shell, the device also comprises a leather fixing structure, and the annular conveying mechanism is connected with the leather fixing structure; an opening is formed in one side of the heat insulation shell; a variable-temperature drying space is arranged in the heat insulation shell along the leather conveying path. According to the method and the device for drying the leather with the oil edge, the surface of the oil edge part of the leather after air drying is smooth, grooves cannot be formed inwards, and the finished product effect is good.

Description

Method and device for drying oil-edge leather

Technical Field

The invention relates to the field of leather drying, in particular to a method and a device for drying leather with greasy edges.

Background

In the leather production process, after the leather blank is cut, the edge of the leather needs to be oiled. And after the oil edge process is finished, the leather needs to be aired. Currently, a leather airing device is designed, and a greasy-edge leather fixing mechanism is rotationally connected to a rotary moving mechanism which is vertically and annularly arranged. When the clothes are dried, the rotary moving mechanism slowly rotates, and the person fixes the oil edge leather on the oil edge leather fixing mechanism which moves to the nearest position to the person. At present, the mode of conveying hot air into the leather drying device is adopted for drying the leather with the greasy edge, and the temperature at each position in the leather drying device is uniform. However, because the oil edge leather is directly contacted with hot air with higher temperature, the surface of the oil edge is dried quickly, and the drying speed in the edge oil is lower, so that the surface of the oil edge is concaved to form a groove, and the finished product effect after the oil edge is dried is poor. In addition, when hanging leather, the personnel are positioned on one side of the leather drying device and can contact with hot air in the device, and the working comfort of the personnel is extremely low.

Disclosure of Invention

The invention aims to provide a method and a device for drying leather with oil edges, which have smooth surfaces of the oil edge parts after the leather is dried by air, do not indent and have good finished product effect.

In order to achieve the purpose, the invention provides a method for drying fried edge leather, which comprises the following steps: the feathered leather moves along a conveying path and is dried by air having a gradually increased temperature.

As a further improvement of the invention, the conveying path is in a closed ring shape, the leather moves at least one circle along the conveying path, and the temperature of the contacted air gradually changes from low to high in the process that the leather moves along the circle of the conveying path.

As a further improvement of the invention, the air contacted with the leather during the movement of the leather along the circle of conveying path is composed of cold air and hot air which are mutually intersected.

As a further improvement of the invention, the ratio of the space occupied by the cold air and the hot air for drying the leather is 1:2-1: 10; the highest temperature of the hot air is 30-40 ℃ and the humidity is 30-45 RH.

In order to achieve the purpose, the invention also provides a fried dough leather drying device which comprises a heat insulation shell and a driving device, wherein an annular conveying mechanism linked with the driving device is arranged in the heat insulation shell, the fried dough leather drying device also comprises a leather fixing structure, and the annular conveying mechanism is connected with the leather fixing structure; an opening is formed in one side of the heat insulation shell; a variable-temperature drying space is arranged in the heat insulation shell along the leather conveying path.

As a further improvement of the invention, the variable temperature drying space comprises a cold air cavity and a hot air cavity which are separated by a partition part in the heat insulation shell; the opening is positioned at one side of the cold air cavity; an air cooler is arranged at the lower part of the cold air cavity, and an air heater is arranged at the lower part of the hot air cavity; the top of the heat insulation shell is provided with an exhaust port close to the cold air cavity and far away from the hot air cavity.

As a further improvement of the invention, the annular conveying mechanism comprises at least two strip-shaped conveying pieces and a plurality of conveying wheels which are arranged in parallel, the conveying wheels are linked with the strip-shaped conveying pieces, and the driving device is linked with the conveying wheels; the ratio of the length of the strip-shaped conveying piece positioned in the cold air cavity to the length of the strip-shaped conveying piece positioned in the hot air cavity is 1:2-1: 10.

As a further improvement of the invention, the strip-shaped conveying member is connected with the leather fixing structure through a friction resistance rotating structure. The friction resistance rotating structure comprises a resistance plate and a swing arm which can rotate around a fixed axis relatively, and the resistance plate is pressed on one side of the swing arm; the swing arm is connected with the leather fixing structure, and the resistance plate is connected with the strip-shaped conveying piece; the frictional resistance rotating structure further comprises a pressure adjusting structure of the resistance plate.

As a further improvement of the invention, the pressure adjusting structure comprises an end plate, the end plate, a resistance plate and a swing arm are sequentially arranged, a bolt is connected to the end plate in a threaded manner, and the top end of the bolt is pressed on one side of the resistance plate; the friction resistance rotating structure further comprises a first pressing plate, a second pressing plate, a connecting pin and a round shaft, and the round shaft is rotatably sleeved with the swing arm; the connecting pin sequentially passes through the first pressing plate, the end plate, the resistance plate, the circular shaft and the second pressing plate and is connected with the annular conveying mechanism; the second pressing plate presses on the swing arm.

Advantageous effects

Compared with the prior art, the method and the device for drying the leather with the greasy edge have the advantages that:

1. the leather behind the oily limit moves along conveying path to carry out the drying to the leather through the air that the temperature rose gradually, be favorable to the heat to permeate into leather oily limit part, the inside temperature rise condition and the stoving effect on surperficial in oily limit part are synchronous basically, thereby effectively avoid appearing the defect that the indent plays the groove in the surface of oily limit part, improve the overall quality of oily limit leather by a wide margin.

2. The conveying path is in a closed ring shape, so that the space can be saved, the oil edge leather is in alternate contact with the drying air at a lower temperature and a higher temperature, and the problem that the surface is not smooth due to large temperature difference between the inside and the outside of the oil edge part and uneven drying speed is avoided.

3. Through mutual intersection cold wind and hot-blast, can form the region that drying temperature gradual change and the difference in temperature are great in comparatively confined space, need not to set up the different fans of multiunit outlet temperature, reduce cost.

4. The lower part of the cold air cavity is provided with an air cooler, the lower part of the hot air cavity is provided with a hot air blower, cold air and hot air are intersected at the top of the partition part, and the personnel hang leather at the opening of the heat insulation shell, and the leather moves upwards along the cold air cavity. The leather moves in sequence along the cold air, the mixed air of the cold air and the hot air, and the purposes of contacting with the air with gradually changing temperature and drying are achieved. In addition, because the cold air cavity is close to the opening, when the person hangs the skin, hot air can not contact with the person due to the blocking effect of the cold air on the hot air, and the person is cooler and higher in comfort level during working.

5. The air exhaust port and the opening of the heat insulation shell are far away from the air heater, so that heat loss is reduced, and energy is saved.

6. The piece is carried through frictional resistance revolution mechanic and is connected with leather fixed knot structure to annular conveying mechanism's bar, and when leather fixed knot structure carried the piece to remove along with the bar, because the resistance effect, the problem of rocking around the pin joint can not appear basically, prevents effectively that leather fixed knot structure from rocking, avoids the dry-off in-process oil limit leather to contact each other, has guaranteed the finished product quality of leather. In addition, when the leather fixing structure turns to along with the strip-shaped conveying piece, the friction resistance is overcome under the action of gravity, the leather fixing structure slowly rotates relative to the annular conveying mechanism, the whole posture is not changed, and the shaking is avoided.

7. In the frictional resistance revolution mechanic, through letting the resistance board press and produce the resistance in swing arm one side, simple structure.

8. Frictional resistance revolution mechanic still includes the pressure regulation structure of resistance board, but the pressure of adjustable resistance board pressure in the swing arm to adjust frictional resistance, the required frictional resistance is adjusted according to the weight of different leathers to the convenience.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings, which illustrate embodiments of the invention.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a perspective view of a device for drying welt leather;

FIG. 2 is a side cross-sectional view of the fur edge drying apparatus;

FIG. 3 is a partial front view of the internal structure of the oil-edge leather drying apparatus;

FIG. 4 is a side view of a coupling structure of the bar-shaped conveying member and the frictional resistance rotary structure;

fig. 5 is a front view of a connecting structure of the strip-shaped conveying member and the frictional resistance rotating structure.

Fig. 6 is a partially enlarged view of fig. 5.

Detailed Description

Embodiments of the present invention will now be described with reference to the accompanying drawings.

Examples

Referring to fig. 1 to 6, a method for drying leather having oil edges according to an embodiment of the present invention includes the steps of: the feathered leather moves along a conveying path and is dried by air having a gradually increased temperature. The hide may be conveyed along a linear, curved, circular, etc. path.

In order to save space, the conveying path is preferably in a closed ring shape, the leather moves for at least one circle along the conveying path, and the temperature of the air contacted with the leather gradually changes from low to high in the process that the leather moves along the circle of the conveying path. According to the requirement, the leather can move for 2 circles or more along the conveying path, and when the leather is not loaded and unloaded at the same station, the leather can also move for one circle and half and other non-integral circles.

In the process that the leather moves along a circle of conveying path, air contacted with the leather consists of cold air and hot air which are mutually intersected.

The ratio of the space occupied by the cold air and the hot air for drying the leather is 1:2-1:10, and the ratio is selected according to the wind speed and the temperature of the cold air and the hot air and the properties of the paint.

The embodiment adopts an oil edge leather drying device, which comprises a heat insulation shell 1 and a driving device 4, wherein the driving device 4 is a motor. An annular conveying mechanism 2 linked with a driving device 4 is arranged in the heat insulation shell 1, the leather fixing structure 3 is further included, and the annular conveying mechanism 2 is connected with the leather fixing structure 3. An opening 11 is formed in one side of the heat insulation shell 1 and used for workers to feed and discharge the oil-edge leather. A variable temperature drying space is arranged in the heat insulation shell 1 along the leather conveying path.

The variable temperature drying space comprises a cold air cavity 14 and a hot air cavity 15 which are separated by a partition part 13 in the heat insulation shell 1. The opening 11 is located at the side of the cold air chamber 14. The lower part of the cold air cavity 14 is provided with an air cooler 6, and the lower part of the hot air cavity 15 is provided with a hot air heater 7. The top of the heat insulation shell 1 is provided with an exhaust port 12 close to the cold air cavity 14 and far away from the hot air cavity 15. In this embodiment, the partition 13 is made of a vertical plate and is made of a heat insulating material. The left side and the right side of the partition part 13 are connected with the inner wall of the heat insulation shell 1, and a gap is reserved between the upper end and the lower end of the partition part 13 and the inner side of the heat insulation shell 1 for conveying leather.

The ring conveyor 2 comprises at least two strip-shaped conveying members 21 arranged in parallel and a plurality of conveying wheels 22, and the conveying wheels 22 are linked with the strip-shaped conveying members 21. The strip-shaped conveying member 21 may be a belt or a chain, and in this embodiment, the strip-shaped conveying member 21 is a chain and the transfer wheel 22 is a sprocket. The driving device 4 is linked with the transmission wheel 22 through a transmission mechanism, and the transmission mechanism can adopt a chain and chain wheel mode. The ratio of the length of the strip-shaped conveying piece 21 positioned in the cold air cavity 14 to the length of the strip-shaped conveying piece positioned in the hot air cavity 15 is 1:2-1: 10. In the embodiment, the ratio of the length of the strip-shaped conveying member 21 in the cold air cavity 14 to the length of the hot air cavity 15 is 1: 5.

The leather fixing structure 3 comprises a fixing frame 31, and a leather fixing member 32 is connected to the fixing frame 31. Two ends of the fixed frame 31 are respectively connected with the two strip-shaped conveying pieces 21 through the friction resistance rotating structure 5. The leather fixing members 32 are a plurality of clips hung on the fixing frame 31 through ropes. The clips may be arranged in four rows along the cord, four cords being arranged along the width of the fixing frame 31.

The frictional resistance rotary structure 5 includes a resistance plate 54 rotatable about a fixed axis and a swing arm 51, the resistance plate 54 pressing against a side of the swing arm 51. The swing arm 51 is connected to the leather holding structure 3 and the resistance plate 54 is connected to the strip conveyor 21.

The frictional resistance rotating structure 5 further includes a pressure regulating structure of the resistance plate 54. In this embodiment, the pressure adjusting structure includes end plate 53, and end plate 53, resistance plate 54 and swing arm 51 arrange in proper order, and threaded connection has bolt 58 on end plate 53, and the top of bolt 58 is pressed in resistance plate 54 one side. The number of bolts 58 is two and is symmetrically arranged along the axis of relative rotation of both the resistance plate 54 and the swing arm 51.

The pressure adjusting structure comprises an end plate 53, wherein the end plate 53, a resistance plate 54 and a swing arm 51 are sequentially arranged, a bolt 58 is connected to the end plate 53 in a threaded mode, and the top end of the bolt 58 is pressed on one side of the resistance plate 54. The frictional resistance rotating structure 5 further comprises a first pressing plate 55, a second pressing plate 57, a connecting pin 56 and a round shaft 52, wherein the round shaft 52 is rotatably sleeved with the swing arm 51. The number of the connecting pins 56 is two and each passes through the first presser plate 55, the end plate 53, the resistance plate 54, the circular shaft 52, and the second presser plate 57 in this order and is connected to the endless conveyor mechanism 2. That is, the first presser plate 55, the end plate 53, the resistance plate 54, the circular shaft 52, and the second presser plate 57 are not rotatable relative to the bar conveyor 21, and only the swing arm 51 is rotatable. The second presser plate 57 presses on the swing arm 51.

Be connected with locating part 9 on the heat insulating casing 1, locating part 9 is located strip and carries piece 21 one side, and locating part 9 carries piece 21 looks adaptation with the strip. The limiting member 9 may be bar-shaped. In this embodiment, each straight line segment of the strip-shaped conveying member 21 may correspond to one limiting member 9. The limiting member 9 corresponding to the straight line segment of the horizontally extending strip-shaped conveying member 21 is positioned below the same, and the limiting member 9 corresponding to the straight line segment of the vertically extending strip-shaped conveying member 21 is positioned on one side of the same.

When using the oil-edged leather drying apparatus, a person stands on the side of the opening 11 of the heat insulating casing 1, and the oil-edged leather is fixed to the clip of the leather fixing structure 3 moved to the side of the opening 11. The leather fixing structure 3 fixed with leather moves upwards along with the strip-shaped conveying piece 21, passes through the cold air cavity 14, and then bypasses the partition part 13 to enter the hot air cavity 15. Because the cold air and the hot air are mutually crossed, a drying area with gradually changed drying temperature and larger temperature difference can be formed in the heat insulation shell 1, and the leather sequentially moves along the sequence of the cold air, the mixed air of the cold air and the hot air, so that the purposes of contacting with the air with gradually changed temperature and drying are realized. In this embodiment, the feeding and discharging of the leather are completed in the opening 11, so that the conveying path of the leather is an integral number of turns. The speed of movement of the strip-shaped conveyor 21 is stable and the time of passage of the hides in the cold air chamber 14 is about 1/5 times of the time of passage of the hides in the hot air chamber 15.

The highest temperature of the hot air is 30-40 ℃ and the humidity is 30-45 RH. The lowest temperature of the cold air is slightly lower than the room temperature, and is about 3-7 ℃ lower than the room temperature. In this embodiment, the temperature in the hot air chamber 15 is 37 ℃, the humidity is 30RH, and the lowest temperature of the cold air in the cold air chamber 14 is 5 ℃ lower than the room temperature.

The present invention has been described in connection with the preferred embodiments, but the present invention is not limited to the embodiments disclosed above, and is intended to cover various modifications, equivalent combinations, which are made in accordance with the spirit of the present invention.

Claims

1. The method for drying the oil-edge leather is characterized by comprising the following steps of: the feathered leather moves along a conveying path and is dried by air having a gradually increased temperature.

2. The method for drying rimmed leather as claimed in claim 1, wherein the conveying path is in the shape of a closed loop, the leather moves at least one turn along the conveying path, and the temperature of the air contacted with the leather gradually changes from low to high during the leather moves along one turn of the conveying path.

3. The method of drying leather having a welt as set forth in claim 2, wherein the air with which the leather is exposed while moving along the endless conveying path is composed of cold air and hot air which are mixed with each other.

4. The method for drying the leather with the greasy edges according to claim 3, wherein the cold air and the hot air occupy the leather at a ratio of 1:2-1: 10; the highest temperature of the hot air is 30-40 ℃ and the humidity is 30-45 RH.

5. The oil edge leather drying device comprises a heat insulation shell (1) and a driving device (4), wherein an annular conveying mechanism (2) linked with the driving device (4) is arranged in the heat insulation shell (1), and the oil edge leather drying device is characterized by further comprising a leather fixing structure (3), and the annular conveying mechanism (2) is connected with the leather fixing structure (3); an opening (11) is formed in one side of the heat insulation shell (1); a variable temperature drying space is arranged in the heat insulation shell (1) along the leather conveying path.

6. The fried side leather drying device as claimed in claim 5, wherein the variable temperature drying space comprises a cold air chamber (14) and a hot air chamber (15) which are separated by a partition (13) in the heat insulation shell (1); the opening (11) is positioned at one side of the cold air cavity (14); a cold air blower (6) is arranged at the lower part of the cold air cavity (14), and a hot air blower (7) is arranged at the lower part of the hot air cavity (15); the top of the heat insulation shell (1) is provided with an exhaust port (12) which is close to the cold air cavity (14) and far away from the hot air cavity (15).

7. A device for drying rimmed leather as in claim 6, characterized in that said endless conveyor means (2) comprise at least two strip-shaped conveying members (21) arranged side by side with each other and a plurality of transfer wheels (22), the transfer wheels (22) being associated with the strip-shaped conveying members (21), the drive means (4) being associated with the transfer wheels (22); the ratio of the length of the strip-shaped conveying piece (21) positioned in the cold air cavity (14) to the length of the strip-shaped conveying piece positioned in the hot air cavity (15) is 1:2-1: 10.

8. A fried edged leather drying device as claimed in claim 7, characterized in that the strip-shaped conveying member (21) is connected to the leather holding structure (3) by means of a frictional resistance rotary structure (5).

9. A device for drying hides and skins according to claim 8, characterized in that said friction-resistant rotary structure (5) comprises a resistance plate (54) rotatable with respect to a fixed axis and a swing arm (51), the resistance plate (54) being pressed against the side of the swing arm (51); the swing arm (51) is connected with the leather fixing structure (3), and the resistance plate (54) is connected with the strip-shaped conveying piece (21); the frictional resistance rotating structure (5) further comprises a pressure adjusting structure of a resistance plate (54).

10. The device for drying the fried leather according to the claim 9, wherein the pressure adjusting structure comprises an end plate (53), the resistance plate (54) and the swing arm (51) are arranged in sequence, a bolt (58) is connected to the end plate (53) in a threaded manner, and the top end of the bolt (58) presses one side of the resistance plate (54); the friction resistance rotating structure (5) further comprises a first pressing plate (55), a second pressing plate (57), a connecting pin (56) and a round shaft (52), and the round shaft (52) is rotatably sleeved with the swing arm (51); the connecting pin (56) sequentially penetrates through the first pressing plate (55), the end plate (53), the resistance plate (54), the round shaft (52) and the second pressing plate (57) and is connected with the annular conveying mechanism (2); the second pressure plate (57) presses on the swing arm (51).