Dyeing machine for yellow-blue retro denim fabric
By introducing the design of guide rollers and spray-dyeing rows into the denim dyeing machine, combined with the drying and winding device, the problems of low efficiency and high cost caused by impregnation are solved, and efficient and uniform dyeing effect and low-cost production are achieved.
Patent Information
- Application Number
- CN202422245860.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-13
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-13
AI Technical Summary
The existing denim dyeing machine uses dipping method to cause the wrinkles of the fabric to be impregnated and requires multiple dipping, cleaning and drying, which is inefficient and cost-effective.
The staggered design of the upper guide roller, the middle guide roller and the lower guide roller is adopted, combined with the upper spraying and lower spraying and dyeing rows, the fabric moves from top to bottom, and through the uniform unit and the drying and winding device, the dyeing usage is reduced and dyeing uniformity and efficiency is improved.
Improve dyeing efficiency, reduce production costs, and ensure dyeing uniformity and drying effect through the design of scraper plates and scraper blades, reducing manual intervention.
Smart Images
Figure CN223047730U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a dyeing machine for fabric production, in particular to a dyeing machine for yellow-over-blue retro denim fabric. Background Art
[0002] Denim is a relatively thick yarn-dyed warp-faced twill cotton fabric. The most common denim is mostly indigo blue, so denim is also called indigo labor cloth. However, with the improvement of people's aesthetics and the progress of technology, there are also many different colors of denim fabrics on the market, such as khaki, gray, dark blue, light blue, etc. In the production process of this kind of denim, the coloring work is mainly carried out by a dyeing machine. The existing dyeing machines used in the production process of denim mainly adopt the dipping method, that is, the denim fabric is put into the dyeing pool for dyeing work. However, because the denim fabric is put into the dyeing pool as a whole during the dipping process, the phenomenon of incomplete dipping will occur at the wrinkled positions of the fabric, which will require multiple dipping, cleaning and drying steps. The overall steps are numerous and complex, thus affecting the overall dyeing work efficiency. Therefore, there is a problem of low work efficiency in the existing denim dyeing process. Summary of the Utility Model
[0003] The purpose of the utility model is to provide a dyeing machine for yellow-over-blue retro denim fabric. The utility model has the advantage of high work efficiency.
[0004] Technical solution of the utility model: A dyeing machine for yellow-sleeved blue retro denim fabric, including a dyeing tank. At the top of one side of the dyeing tank, a feeding channel is provided, and at the bottom of the other side, a discharging channel is provided; on the inner bottom surface of the dyeing tank, a leveling unit is arranged at a position corresponding to one side of the discharging channel, and a middle guiding roller is arranged above the leveling unit; on one side of the middle guiding roller, an upper guiding roller and a lower guiding roller are symmetrically distributed up and down, and the lower guiding roller is arranged between the middle guiding roller and the leveling unit; between the upper guiding roller and the middle guiding roller, a plurality of upper spraying rows are arranged, and between the upper guiding roller and the lower guiding roller, a plurality of lower spraying rows spraying towards the lower guiding roller are arranged; on one side of the dyeing tank, a dye supply device for supplying materials to the upper spraying rows and the lower spraying rows is provided, and on one side of the dye supply device, a drying and winding device communicated with the discharging channel is provided; by using the upper guiding roller, the middle guiding roller and the lower guiding roller, the denim fabric can move from top to bottom in the dyeing tank, which can maximize the avoidance of the phenomenon of accumulation and wrinkles of the denim fabric in the dyeing tank. Coupled with the upper spraying rows and the lower spraying rows, the upper and lower surfaces of the denim fabric can be respectively sprayed. Compared with the previous dipping method, it can reduce dyes and water consumption, not only improving work efficiency but also reducing production costs; by using the leveling unit to level the dye, the dye can be more evenly dyed on the denim fabric, ensuring the dyeing effect; by using the drying and winding device, the denim fabric that has completed the dyeing work can be dried and wound, reducing the labor work of manual winding and improving work efficiency.
[0005] In the aforementioned dyeing machine for yellow-sleeved blue retro denim fabric, the drying and winding device includes a drying box communicated with the discharging channel. On both inner side surfaces of the drying box, air outlet pipes are provided, and each air outlet pipe is provided with a plurality of evenly distributed air outlet heads; at one end of each air outlet pipe, a blower is connected, and on the inner side wall of each air outlet pipe corresponding to the position connected to the blower, an electric heating ring is attached; on the side of the drying box far from the discharging channel, an outlet is provided, and two symmetrically distributed shaping rollers are rotatably installed on the outlet; on both sides of the outlet, inclined support frames are provided, and between the two support frames, a winding shaft is rotatably installed, and the end of the winding shaft is connected with a winding motor; by using the electric heating ring, the air flow in the air outlet pipe can be heated, so that the air blown out by the air outlet pipe is hot air, and thus the dye can enter the denim fabric faster during the drying process, further improving the dyeing effect.
[0006] In the aforementioned dyeing machine for yellow-sleeved blue retro denim fabric, scraping frames are arranged on the inner side walls of the dyeing tank at positions corresponding to the upper and lower sides of the discharging channel, and on each scraping frame, a scraping plate for scraping off the excess dye solution on the denim fabric is provided; by using the scraping plate, the excess dye on the fabric can be scraped off, facilitating the subsequent drying work and improving work efficiency.
[0007] In the aforementioned dyeing machine for yellow-over-blue retro denim fabric, the leveling unit includes two leveling rollers symmetrically arranged up and down, and both ends of each leveling roller are rotatably installed on the dyeing tank; the leveling roller and the scraping plate are arranged oppositely.
[0008] In the aforementioned dyeing machine for yellow-over-blue retro denim fabric, leveling rollers are arranged on one side of both the lower guiding roller and the middle guiding roller; by arranging leveling rollers on one side of the middle guiding roller and the lower guiding roller as well, the surface of the fabric that has completed the spraying and dyeing work can be leveled during the movement of the fabric, further ensuring the dyeing effect.
[0009] In the aforementioned dyeing machine for yellow-over-blue retro denim fabric, inclined collecting plates are arranged on the outer side wall of the dyeing tank at positions corresponding to the upper and lower sides of the feeding channel, and scraping blades are installed at the ends of each collecting plate; suction hair covers are arranged on the side of each collecting plate away from the other collecting plate, and suction pipes are connected to the ends of each suction hair cover; a suction pump is connected to the end of each suction pipe; the scraping blades can scrape the fluff on the surface of the fabric to avoid the influence of the fluff on the spraying and dyeing effect.
[0010] In the aforementioned dyeing machine for yellow-over-blue retro denim fabric, the dye supply device includes a dye tank, and a stirring motor is arranged on the top surface of the dye tank; a stirring shaft located inside the dye tank is installed on the stirring motor, and a plurality of uniformly distributed stirring blades are arranged on the stirring shaft; a discharge pipe is arranged on the bottom surface of the dye tank, and a pumping pump is installed on the discharge pipe; a three-way joint is arranged at the end of the discharge pipe, and two distribution pipes communicating with the upper spraying row and the lower spraying row are installed on the three-way joint.
[0011] In the aforementioned dyeing machine for yellow-over-blue retro denim fabric, a feeding port is arranged on the top surface of the dye tank at a position corresponding to one side of the stirring motor, and guiding strips are arranged on both sides of the feeding port; sliding grooves are arranged on the side of each guiding strip facing the other guiding strip, and a cover plate for blocking the feeding port is slidably installed between the two sliding grooves; a handle is arranged on the top surface of the cover plate; the feeding port can facilitate the replenishment of dye into the dye tank; the arrangement of the guiding strips on both sides of the feeding port and the cover plate slidably installed between the two guiding strips can block the feeding port during the non-feeding process to prevent external impurities from entering the dye tank and contaminating the dye, reducing the production cost; the arrangement of the handle on the cover plate facilitates pulling the cover plate to move, making it convenient to use.
[0012] Compared with the prior art, the utility model improves the existing dyeing equipment for denim fabrics. By arranging an upper guide roller, a middle guide roller and a lower guide roller which are arranged in a staggered manner from top to bottom in the dyeing box, the denim fabric can be moved from top to bottom in the dyeing box by using the upper guide roller, the middle guide roller and the lower guide roller, which can maximize the avoidance of the phenomenon of accumulation and wrinkles of the denim fabric in the dyeing box, and thus ensure the uniformity of dyeing to a certain extent; By arranging a plurality of upper spraying rows above the upper guide roller and a plurality of lower spraying rows above the lower guide roller, the upper spraying rows and the lower spraying rows can be used to carry out spraying and dyeing work on the denim fabric. The setting of the middle guide roller enables the denim fabric to be turned over, so that the upper spraying rows and the lower spraying rows can respectively carry out spraying and dyeing work on the upper and lower surfaces of the denim fabric. Compared with the conventional dipping method, it can reduce the amount of dye and water consumption, not only improve the work efficiency, but also reduce the production cost; At the same time, it is cooperated with the uniform unit arranged at the bottommost part, and the uniform unit is used to uniformly process the dye, so that the dye can be more uniformly dyed on the denim fabric, ensuring the dyeing effect; At the same time, by arranging a drying and winding device on one side of the discharge channel, the drying and winding device can be used to carry out drying and winding work on the denim fabric that has completed the dyeing work, reducing the labor work of manual winding and improving the work efficiency. In addition, the utility model also arranges an electric heating ring on the air outlet pipe, and the electric heating ring can be used to heat the air flow in the air outlet pipe, so that the air blown out by the air outlet pipe is hot air, and thus the dye can enter the interior of the denim fabric faster during the drying process, further improving the dyeing effect; By arranging a scraping plate, the scraping plate can be used to scrape off the excess dye on the fabric, facilitating the subsequent drying work and improving the work efficiency; By arranging uniform rollers on one side of the middle guide roller and the lower guide roller, the surface of the fabric that has completed the spraying and dyeing work can be made uniform during the movement of the fabric, further ensuring the dyeing effect; By arranging a fluff scraping piece on one side of the feeding channel, the fluff scraping piece can be used to scrape off the fluff on the surface of the fabric to avoid the influence of the fluff on the spraying and dyeing effect; By arranging a fluff suction cover, a suction pipe and a suction pump on the collecting plate, the fluff scraped off by the fluff scraping piece can be collected and cleaned, ensuring that the fluff scraping piece can continuously carry out fluff scraping work without manual follow-up treatment, improving the work efficiency; By arranging a feeding port on the top surface of the dye box, the feeding port can be used to conveniently supplement the dye into the dye box; The setting of the guide strips on both sides of the feeding port and the cover plate slidably installed between the two guide strips can block the feeding port during the non-feeding process, preventing external impurities from entering the dye box and contaminating the dye, reducing the production cost; The setting of the handle on the cover plate facilitates pulling the cover plate to move and is convenient to use. Therefore, the utility model can not only improve the work efficiency, but also has the advantages of good dyeing effect, low production cost and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 is a schematic structural view of the present utility model;
[0014] Figure 2 is a top view of the present utility model;
[0015] Figure 3 is a schematic structural view of the air outlet duct;
[0016] Figure 4 is a schematic structural view of the dye tank.
[0017] The reference numerals in the drawings are: 1 - dyeing tank, 2 - feeding channel, 3 - discharging channel, 4 - middle guide roller, 5 - upper guide roller, 6 - lower guide roller, 7 - upper spraying row, 8 - lower spraying row, 9 - drying box, 10 - air outlet duct, 11 - air outlet head, 12 - electric heating ring, 13 - shaping roller, 14 - winding shaft, 15 - winding motor, 16 - scraping plate, 17 - leveling roller, 18 - collecting plate, 19 - hair scraping piece, 20 - hair suction hood, 21 - dye tank, 22 - stirring motor, 23 - stirring shaft, 24 - stirring blade, 25 - discharging pipe, 26 - three-way head, 27 - distributing pipe, 28 - feeding port, 29 - guiding strip, 30 - slideway, 31 - cover plate, 32 - handle part. Detailed implementation manners
[0018] The present utility model will be further described below in conjunction with the drawings and embodiments, but it shall not be used as a basis for limiting the present utility model.
[0019] Embodiment. A dyeing machine for yellow-sleeved blue retro denim fabric, the structure of which is as Figures 1 to 4 shown, comprising a dyeing tank 1, the top end of one side surface of the dyeing tank 1 is provided with a feeding channel 2, and the bottom end of the other side surface is provided with a discharging channel 3; a leveling unit is arranged on the inner bottom surface of the dyeing tank 1 corresponding to one side of the discharging channel 3, and a middle guide roller 4 is arranged above the leveling unit; one side of the middle guide roller 4 is provided with an upper guide roller 5 and a lower guide roller 6 which are symmetrically distributed up and down, and the lower guide roller 6 is arranged between the middle guide roller 4 and the leveling unit; a plurality of upper spraying rows 7 are arranged between the upper guide roller 5 and the middle guide roller 4, and a plurality of lower spraying rows 8 for spraying dye towards the lower guide roller 6 are arranged between the upper guide roller 5 and the lower guide roller 6; a dye supply device for supplying materials to the upper spraying row 7 and the lower spraying row 8 is arranged on one side of the dyeing tank 1, and a drying and winding device communicated with the discharging channel 3 is arranged on one side of the dye supply device.
[0020] The drying and winding device includes a drying box 9 communicated with the discharge channel 3. Air outlet pipes 10 are arranged on both inner side surfaces of the drying box 9, and a plurality of uniformly distributed air outlet heads 11 are arranged on each air outlet pipe 10; one end of each air outlet pipe 10 is connected with a blower, and an electric heating ring 12 is attached to the inner side wall of each air outlet pipe 10 at the position corresponding to the connection with the blower; on the side surface of the drying box 9 far away from the discharge channel 3, there is an outlet, and two symmetrically distributed shaping rollers 13 are rotatably installed on the outlet; inclined support frames are arranged on both sides of the outlet, and a winding shaft 14 is rotatably installed between the two support frames. The end of the winding shaft 14 is connected with a winding motor 15; on the inner side wall of the dyeing box 1, scraping frames are arranged at the positions corresponding to the upper and lower sides of the discharge channel 3, and scraping plates 16 for scraping off the excess dye solution on the denim fabric are arranged on each scraping frame; the leveling unit includes two leveling rollers 17 symmetrically arranged up and down, and both ends of each leveling roller 17 are rotatably installed on the dyeing box 1; the leveling rollers 17 and the scraping plates 16 are arranged oppositely; leveling rollers 17 are arranged on one side of both the lower guide roller 6 and the middle guide roller 4; on the outer side wall of the dyeing box 1, inclined collecting plates 18 are arranged at the positions corresponding to the upper and lower sides of the feeding channel 2, and scraping blades 19 are installed at the end of each collecting plate 18; on the side surface of each collecting plate 18 far away from the other collecting plate 18, a hair suction hood 20 is arranged, and a suction pipe is connected to the end of each hair suction hood 20; the end of each suction pipe is connected with a suction pump; the dye supply device includes a dye box 21, and a stirring motor 22 is arranged on the top surface of the dye box 21; a stirring shaft 23 located inside the dye box 21 is installed on the stirring motor 22, and a plurality of uniformly distributed stirring blades 24 are arranged on the stirring shaft 23; a discharge pipe 25 is arranged on the bottom surface of the dye box 21, and a pumping pump is installed on the discharge pipe 25; a three-way joint 26 is arranged at the end of the discharge pipe 25, and two distributing pipes 27 communicated with the upper spraying row 7 and the lower spraying row 8 are installed on the three-way joint 26; a feeding port 28 is arranged on the top surface of the dye box 21 at the position corresponding to one side of the stirring motor 22, and guide strips 29 are arranged on both sides of the feeding port 28; slideways 30 are arranged on the side surfaces of each guide strip 29 facing the other guide strip 29, and a cover plate 31 for blocking the feeding port 28 is slidably installed between the two slideways 30; a handle part 32 is arranged on the top surface of the cover plate 31.
[0021] Working principle: When specifically performing fabric dyeing work, first pull the handle 32 to one side to move the cover plate 31 along the slideway 30 on the guide bar 29, so that the cover plate 31 moves from above the feeding port 28 to one side, making the feeding port 28 in an open state. Then, sufficient dye can be added into the dye tank 21 through the feeding port 28. After the dye addition is completed, push the cover plate 31 towards the feeding port 28 through the handle 32, so that the cover plate 31 finally slides above the feeding port 28 and blocks the feeding port 28. Then, the denim fabric to be dyed is put into the dyeing tank 1 from the feeding channel 2.
[0022] Before the denim fabric enters the feeding channel 2, it will first contact the fluff scraping blade 19. The fluff scraping blade 19 can be used to scrape the fluff on the surface of the denim fabric, avoiding the phenomenon that a large amount of dye is absorbed due to a large amount of fluff on the surface of the denim fabric and a certain blockage is generated on the surface of the fabric, resulting in the dye not being able to penetrate into the interior of the denim fabric, ensuring the dyeing effect (while the fluff scraping blade 19 is scraping the fluff, it is necessary to control the suction pump connected to the fluff suction hood 20 to start, so that the suction pump can collect the fluff scraped by the fluff scraping blade 19 through the suction pipe and the fluff suction hood 20, facilitating the subsequent cleaning work); when the denim fabric completes the fluff scraping work, it will enter the dyeing tank 1 through the feeding channel 2 and pass through the upper guide roller 5, the middle guide roller 4, the lower guide roller 6 and the uniform roller 17 in sequence.
[0023] When the fabric enters the dyeing tank 1, it is necessary to control the stirring motor 22 and the material pumping pump to start simultaneously. After the stirring motor 22 starts, it will drive the stirring shaft 23 to rotate. After the stirring shaft 23 rotates, it will drive the stirring blades 24 to rotate. By rotating the stirring blades 24, the dye in the dye tank 21 can be stirred, so that the dye inside is always in a uniform state to ensure the subsequent spraying effect. After the material pumping pump starts, it will suck the dye in the dye tank 21 to the upper spraying row 7 and the lower spraying row 8 through the discharge pipe 25. Thus, when the denim fabric passes through the upper guide roller 5, the upper spraying row 7 can spray the upper surface of the denim fabric. As the denim fabric moves, the denim fabric will pass through the middle guide roller 4. At this time, the uniform roller 17 on one side of the middle guide roller 4 cooperates with the middle guide roller 4 to perform the first dyeing uniformity work on the upper surface of the denim fabric. At the same time, the middle guide roller 4 will flip the denim fabric, so that the lower surface of the denim fabric faces upward during the process of moving to the lower guide roller 6. Thus, when the fabric passes through the lower spraying row 8, the lower spraying row 8 can spray the lower surface of the denim fabric. As the denim fabric continues to move, the denim fabric will pass through the lower guide roller 6. By the mutual cooperation of the lower guide roller 6 and the uniform roller 17 located on the side of the lower guide roller 6 far from the middle guide roller 4, the dye on the upper and lower surfaces of the denim fabric can be made uniform, so that the dye can be more uniform on the surface of the fabric, thus ensuring the uniformity of dyeing.
[0024] After the denim fabric passes through the lower guide roller 6, the denim fabric will pass through two uniform rollers 17. By using the two uniform rollers 17, the dyeing uniformity work on the denim fabric can be carried out again, and at the same time, the dye can be squeezed into the inside of the denim fabric as much as possible, ensuring the overall dyeing effect. After the denim fabric passes through the two uniform rollers 17, the denim fabric passes through two scraping plates 16. By using the scraping plates 16, the excess dye solution on the surface of the denim fabric can be scraped off to facilitate the subsequent drying work. After the denim fabric passes through the scraping plates 16, it will enter the drying box 9 through the discharge channel 3. At this time, control the electric heating ring 12 to be powered on and started, and at the same time control the blower to start. After the blower starts, it will input air into the air outlet pipe 10, and this part of the air will be heated by the electric heating ring 12 when passing through the electric heating ring 12. Thus, the air outlet pipe 10 inputs hot air into the drying box 9 through the air outlet head 11, so as to quickly dry the denim fabric entering the drying box 9. Then the denim fabric that has completed the drying work will be shaped between the two shaping rollers 13 at the upper outlet of the drying box 9, and finally move to the take-up reel 14 through the outlet. At this time, start the take-up motor 15. After the take-up motor 15 starts, it will drive the take-up reel 14 to rotate, and the take-up reel 14 is used to wind up the denim fabric.
Claims
1. A dyeing machine for yellow-over-blue vintage denim fabric, comprising a dyeing box (1), characterized in that: The top end of one side of the dyeing box (1) is provided with a material feeding channel (2), and the bottom end of the other side is provided with a material discharging channel (3); a uniform unit is provided at a position corresponding to one side of the material discharging channel (3) on the inner bottom surface of the dyeing box (1), and a middle guide roller (4) is provided above the uniform unit; an upper guide roller (5) and a lower guide roller (6) symmetrically distributed up and down are provided on one side of the middle guide roller (4), and the lower guide roller (6) is provided between the middle guide roller (4) and the uniform unit; a plurality of upper spray-dyeing rows (7) are provided between the upper guide roller (5) and the middle guide roller (4), and a plurality of lower spray-dyeing rows (8) for spraying toward the lower guide roller (6) are provided between the upper guide roller (5) and the lower guide roller (6); a dye supply device for supplying material to the upper spray-dyeing rows (7) and the lower spray-dyeing rows (8) is provided on one side of the dyeing box (1), and a drying and winding device connected to the material discharging channel (3) is provided on one side of the dye supply device.
2. The yellow-over-blue vintage denim fabric dyeing machine according to claim 1, characterized in that: The drying and winding device comprises a drying box (9) connected to the discharge channel (3), air outlet pipes (10) are arranged on both inner side surfaces of the drying box (9), and each air outlet pipe (10) is provided with a plurality of evenly distributed air outlet heads (11); one end of each air outlet pipe (10) is connected to a blower, and an electric heating ring (12) is attached to the inner wall of each air outlet pipe (10) at a position corresponding to the connection with the blower; an outlet is arranged on the side of the drying box (9) away from the discharge channel (3), and two symmetrically distributed shaping rollers (13) are rotatably mounted on the outlet; inclined support frames are arranged on both sides of the outlet, and a winding shaft (14) is rotatably mounted between the two support frames, and a winding motor (15) is connected to the end of the winding shaft (14).
3. The yellow-over-blue vintage denim fabric dyeing machine according to claim 1, characterized in that: Scraping racks are provided on the inner side wall of the dyeing box (1) at positions corresponding to the upper and lower sides of the discharge channel (3), and each scraping rack is provided with a scraping plate (16) for scraping off excess dye on the denim fabric.
4. The yellow-over-blue vintage denim fabric dyeing machine according to claim 3, characterized in that: The uniform unit comprises two uniform rollers (17) symmetrically arranged up and down, and both ends of each uniform roller (17) are rotatably mounted on the dyeing box (1); the uniform roller (17) and the scraper plate (16) are arranged opposite to each other.
5. The yellow-over-blue vintage denim fabric dyeing machine according to claim 1, characterized in that: A uniform roller (17) is provided on one side of the lower guide roller (6) and the middle guide roller (4).
6. The yellow-over-blue vintage denim fabric dyeing machine according to claim 1, characterized in that: Inclined collecting plates (18) are provided on the outer wall of the dyeing box (1) at positions corresponding to the upper and lower sides of the feeding channel (2), and a scraping blade (19) is installed at the end of each collecting plate (18); a hair suction cover (20) is provided on the side of each collecting plate (18) away from another collecting plate (18), and a suction pipe is connected to the end of each hair suction cover (20); and a suction pump is connected to the end of each suction pipe.
7. A dyeing machine for yellow-over-blue vintage denim fabric according to any one of claims 1 to 6, characterized in that: The dye supply device comprises a dye box (21), the top surface of which is provided with a stirring motor (22); the stirring motor (22) is provided with a stirring shaft (23) located in the dye box (21), and the stirring shaft (23) is provided with a plurality of stirring blades (24) evenly distributed; the bottom surface of the dye box (21) is provided with a discharge pipe (25), and the discharge pipe (25) is provided with a suction pump; the end of the discharge pipe (25) is provided with a three-way head (26), and the three-way head (26) is provided with two distribution pipes (27) connected with an upper spray-dyeing row (7) and a lower spray-dyeing row (8).
8. The yellow-over-blue vintage denim fabric dyeing machine according to claim 7, characterized in that: A feeding port (28) is provided on the top surface of the dye box (21) at a position corresponding to one side of the stirring motor (22), and guide strips (29) are provided on both sides of the feeding port (28); a slideway (30) is provided on the side of each guide strip (29) facing the other guide strip (29), and a cover plate (31) for blocking the feeding port (28) is slidably installed between the two slideways (30); A handle (32) is provided on the top surface of the cover plate (31).