A calender for PVC artificial leather

Abstract

The present invention discloses a calender for PVC artificial leather, which relates to the field of calenders and includes two groups of support frames, a soft roller and a hard roller connected between the two groups of support frames, a heating chamber provided inside the central shaft, a central shaft installed inside the hard roller, and both ends of the central shaft extending to the outside of the hard roller, a top end of the central shaft located on the inner wall of the hard roller, a spray groove provided, an extrusion plate provided at the edge of the spray groove, a space between the extrusion plate and the inner wall of the hard roller forming a heating layer, and the spray groove aligned with the top end of the central shaft. The present invention, through the provision of a heating chamber, a hard roller, a central shaft, and an oil return pipe, can, when heating the hard roller, allow the heated heat-conducting oil to be aligned with the position where the hard roller and the artificial leather are squeezed through the spray groove, thereby improving the heating effect, and the heating layer formed by the extrusion plate and the inner wall of the hard roller increases the contact area between the heat-conducting oil and the inner wall of the hard roller.

Description

Technical Field

[0001] The invention relates to the field of calenders, in particular to a calender for PVC artificial leather. Background Art

[0002] Calendering, also known as calendering, is the final step in heavy leather finishing. This process utilizes the plasticity of fibers under mixed heat conditions to flatten or create fine, parallel, diagonal lines on the surface of the fabric, enhancing its gloss. This process typically involves multiple sets of hard and soft rollers. The hard rollers are typically made of metal, with a highly polished surface or densely packed parallel grooves and a heater. The soft rollers are typically made of fiber or polyamide plastic. Calendering the artificial leather using different pressures and temperatures between the hard and soft rollers creates varying surface glosses.

[0003] The interior of the existing hard roller usually adopts a hollow structure, and the temperature of the hard roller is adjusted by a heating device to facilitate the processing of artificial leather. However, during the processing of artificial leather, the artificial leather is squeezed only through the meshing position of the hard roller and the soft roller, which causes the position where the hard roller does not contact the artificial leather to be in contact with the outside air, resulting in heat loss and energy waste. Secondly, the edges of the artificial leather usually have residual fragments and other impurities after trimming. After being squeezed by the hard roller, they will adhere to the surface of the hard roller (especially the hard roller with parallel inclined grooves). The attached fragments can easily squeeze the subsequent artificial leather, causing damage to the artificial leather and pits. Summary of the Invention

[0004] Based on this, the purpose of the present invention is to provide a calender for PVC artificial leather to solve the technical problems that the heat of the hard roller is easily lost and impurities attached to the surface of the hard roller are easy to cause damage to the artificial leather.

[0005] To achieve the above-mentioned object, the present invention provides the following technical solution: a calender for PVC artificial leather, comprising two sets of support frames, a soft roller and a hard roller connected between the two sets of support frames, a heating chamber provided inside the central shaft, a central shaft installed inside the hard roller, and both ends of the central shaft extending to the outside of the hard roller, a top end of the central shaft located on the inner wall of the hard roller with a spray groove, an edge position of the spray groove with a squeeze plate, a space between the squeeze plate and the inner wall of the hard roller forming a heating layer, the spray groove is aligned with the top end of the central shaft, and a spray groove is provided at the edge position of the spray groove, two ends of the central shaft are respectively connected to a connecting pipe and a discharge pipe, the bottom end of the discharge pipe is connected to multiple sets of recovery pipes, and each set of recovery pipes passes through the central shaft and extends into the heating chamber, a cleaning mechanism is installed at the bottom end of the hard roller, the cleaning mechanism cleans impurities on the surface of the hard roller, a heating chamber is installed below the cleaning mechanism, a heating pipe and an oil return pipe are connected to the side of the heating chamber, the heating pipe is connected to the heating pipe and the connecting pipe, and the oil return pipe is connected to the discharge pipe.

[0006] By adopting the above technical solution, the hard roller can be heated, and the heating position is located at the contact position between the hard roller and the artificial leather, thereby improving the heating effect on the artificial leather.

[0007] The present invention is further configured such that an anti-rolling rod is connected between the two groups of support frames, the anti-rolling rod is located outside the tangent position of the soft roller and the hard roller, the bottom end of the support frame is connected to a base, the heating chamber is installed at the top of the base, and the hard roller is rotatably connected to the base.

[0008] By adopting the above technical solution, the probability of foreign objects being drawn into the calender can be reduced.

[0009] The present invention is further configured such that a heating plate is installed inside the heating chamber, and the interior of the heating chamber is filled with heat transfer oil, and both the heating pipe and the oil return pipe are installed with an oil pump, which provides a power source for the heat transfer oil.

[0010] By adopting the above technical solution, it is convenient to add the heat transfer oil, and the heat transfer oil is injected into the hard roller through the oil pump.

[0011] The present invention is further configured such that a scraper is connected to the top of the cleaning mechanism, and the scraper is in contact with the outer wall of the hard roller; a discharge chute is provided at the bottom of the cleaning mechanism; a recovery box is provided below the cleaning mechanism; the recovery box is located below the scraper and the discharge chute, and the recovery box recovers impurities.

[0012] By adopting the above technical solution, impurities on the outside of the hard roller can be easily cleaned.

[0013] The present invention is further configured such that a plurality of pairs of nozzles are installed inside the side of the cleaning mechanism away from the scraper, each pair of nozzles are sequentially arranged on the inner wall of the nozzle from top to bottom, and the spacing between each pair of nozzles also gradually increases from bottom to top.

[0014] By adopting the above technical solution, impurities accumulated inside the parallel chute can also be cleaned.

[0015] The present invention is further configured such that an air distribution pipe is connected to the outer side of the bottom end of the cleaning mechanism, the air distribution pipe is connected to each pair of nozzles, and an air intake pipe is connected to the side of the air distribution pipe, which is connected to an external high-pressure air source.

[0016] By adopting the above technical solution, the temperature of the ejected air flow can be increased, thereby reducing the decrease in the temperature of the hard roller.

[0017] The present invention is further configured such that through holes are provided on both sides of the recovery pipe, and the heat transfer oil inside the heating chamber enters the interior of the recovery pipe through the through holes.

[0018] By adopting the above technical solution, the heat transfer oil in the heating chamber can be easily returned to the discharge pipe.

[0019] In summary, the present invention mainly has the following beneficial effects:

[0020] 1. The present invention provides a heating chamber, a hard roller, a central axis and an oil return pipe, so that when the hard roller is heated, the heated heat-conducting oil can be aligned with the position where the hard roller and the artificial leather are squeezed through the ejection groove, thereby improving the heating effect. In addition, the heating layer formed by the extrusion plate and the inner wall of the hard roller increases the contact area between the heat-conducting oil and the inner wall of the hard roller, thereby improving the heat conduction effect, further improving the utilization of the heat inside the heat-conducting oil, and improving the use of energy.

[0021] 2. Secondly, the present invention also has a cleaning mechanism, which can clean the impurities on the surface of the hard roller through a scraper when impurities remain on the surface of the hard roller, and blow out the impurities in the parallel inclined grooves on the surface of the hard roller through the airflow generated by the nozzle, thereby facilitating the cleaning of the hard roller and reducing damage to the artificial leather.

[0022] 3. Finally, the present invention arranges the cleaning mechanism above the heating chamber. When the airflow enters the interior of each group of nozzles, the airflow is heated by the waste heat of the heating chamber, thereby increasing the temperature of the ejected airflow, reducing the temperature drop of the hard roller, avoiding the use of additional energy to add to the hard roller, and improving the reason for energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention;

[0024] Figure 2 This is a schematic diagram of the hard roller installation structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the central axis structure inside the hard roller of the present invention;

[0026] Figure 4 This is a schematic diagram of the cross-sectional structure of the hard roller and the central axis of the present invention;

[0027] Figure 5 It is a schematic structural diagram of the cleaning mechanism of the present invention;

[0028] Figure 6 This is a schematic diagram of the recycling box separation structure of the present invention;

[0029] Figure 7 It is a schematic diagram of the structural cross-section of the present invention.

[0030] In the figure: 1. Support frame; 101. Anti-roll bar; 2. Soft roller; 3. Cleaning mechanism; 301. Scraper; 302. Discharge chute; 303. Air jet; 304. Recovery box; 305. Air inlet pipe; 306. Air distribution pipe; 4. Heating chamber; 401. Heating pipe; 402. Oil return pipe; 5. Hard roller; 501. Heating bin; 502. Heating layer; 6. Center axis; 601. Connecting pipe; 602. Ejection trough; 603. Extrusion plate; 7. Discharge pipe; 701. Recovery pipe; 8. Base. DETAILED DESCRIPTION

[0031] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0032] The following describes an embodiment of the present invention based on its overall structure.

[0033] A calender for PVC artificial leather, such as Figures 1 to 7As shown, it includes two groups of support frames 1, a soft roller 2 and a hard roller 5 are connected between the two groups of support frames 1, a heating chamber 501 is provided inside the central shaft 6, a central shaft 6 is installed inside the hard roller 5, and both ends of the central shaft 6 extend to the outside of the hard roller 5, the top of the central shaft 6 is located on the inner wall of the hard roller 5 and a spraying groove 602 is provided, an extrusion plate 603 is provided at the edge of the spraying groove 602, and a heating layer 502 is formed between the extrusion plate 603 and the inner wall of the hard roller 5, the spraying groove 602 is aligned with the top of the central shaft 6, and a spraying groove 602 is provided at the edge of the spraying groove 602, both ends of the central shaft 6 are respectively connected to a connecting pipe 601 and a discharge pipe 7, a bottom end of the discharge pipe 7 is connected to a plurality of recovery pipes 701, and each recovery pipe 701 passes through the central shaft 6 and extends to the inside of the heating chamber 501, the heated heat transfer oil enters the central shaft 6 and is discharged through the spraying groove 602 at the top of the central shaft 6, and the spraying groove 602 is aligned with the top of the hard roller 5 Alignment allows the heated heat transfer oil to heat the artificial leather during the calendering process, and the heated heat transfer oil will then pass through the heating layer 502 formed by the inner wall of the hard roller 5 and the extrusion plate 603, reducing the flow of the heat transfer oil and fully increasing the contact area between the heat transfer oil and the inner wall of the hard roller 5, so that most of the heat of the heat transfer oil can pass through the top of the hard roller 5 to heat the artificial leather, thereby improving the heat transfer efficiency of the heat transfer oil. A cleaning mechanism 3 is installed at the bottom end of the hard roller 5, and the cleaning mechanism 3 cleans impurities on the surface of the hard roller 5. A heating chamber 4 is installed below the cleaning mechanism 3, and a heating plate is installed inside the heating chamber 4, and the interior of the heating chamber 4 is filled with heat transfer oil. The heating pipe 401 and the return oil pipe 402 are both equipped with oil pumps, which provide a power source for the heat transfer oil. The side of the heating chamber 4 is connected to the heating pipe 401 and the return oil pipe 402, and the heating pipe 401 is connected to the heating pipe 401 and the connecting pipe 601, and the return oil pipe 402 is connected to the discharge pipe 7.

[0034] See also Figure 2 and Figure 5 An anti-rolling rod 101 is connected between the two groups of support frames 1. The anti-rolling rod 101 is located outside the tangent position of the soft roller 2 and the hard roller 5. The bottom end of the support frame 1 is connected to the base 8, and the heating chamber 4 is installed on the top of the base 8. The hard roller 5 is rotatably connected to the base 8, which is convenient for limiting and fixing the calender.

[0035] See also Figures 5 to 7The top of the cleaning mechanism 3 is connected to a scraper 301, and the scraper 301 is in contact with the outer wall of the hard roller 5, and the bottom end of the cleaning mechanism 3 is provided with a discharge chute 302, and a recovery box 304 is provided below the cleaning mechanism 3, and the recovery box 304 is located below the scraper 301 and the discharge chute 302, and the recovery box 304 recovers impurities. A plurality of pairs of nozzles 303 are installed inside the side of the cleaning mechanism 3 away from the scraper 301, and each pair of nozzles 303 is arranged on the inner wall of the nozzle head 303 from top to bottom, and the spacing between each pair of nozzles 303 also gradually increases from bottom to top. The outer side of the bottom end of the cleaning mechanism 3 is connected to an air distribution pipe 306, and the air distribution pipe 306 is connected to each pair of nozzles 303. The side of the air distribution pipe 306 is connected to an air inlet pipe 305, and the air inlet pipe 305 is connected to an external high-pressure air source, which can conveniently clean the hard roller, and the temperature of the hard roller will not be reduced too much during the cleaning process.

[0036] See also Figure 4 Through holes are provided on both sides of the recovery pipe 701, and the heat transfer oil inside the heating chamber 501 enters the interior of the recovery pipe 701 through the through holes.

[0037] When using the calender, first connect the calender to an external power source (such as a motor or other structure), then insert the artificial leather to be processed between the soft roller 2 and the hard roller 5, and drive the soft roller 2 and the hard roller 5 to rotate through the power source to calender the artificial leather. At the same time, start the multiple sets of heating plates in the heating chamber 4 to heat the heat-conducting oil in the heating chamber 4, and then start the oil pump on one side of the heating chamber 4 to inject the heat-conducting oil into the connecting pipe 601 through the heating pipe 401. The connecting pipe 601 is connected to the inside of the central shaft 6, so that the heated heat-conducting oil enters the central shaft 6 and is discharged through the ejection groove 602 at the top of the central shaft 6. The ejection groove 602 is aligned with the top of the hard roller 5 (or is at a position where the calendered material and the hard roller 5 are in contact. The present invention uses the hard roller 5 top position for example), so that the heated heat-conducting oil can heat the artificial leather in the calendering process, and then the heated heat-conducting oil will pass through the heating layer 502 formed by the inner wall of the hard roller 5 and the extrusion plate 603, so that the flow of the heat-conducting oil is reduced, and the contact area between the heat-conducting oil and the inner wall of the hard roller 5 is fully increased, so that most of the heat of the heat-conducting oil can be used to heat the artificial leather through the top of the hard roller 5, thereby improving the heat transfer efficiency of the heat-conducting oil and reducing heat waste. The remaining heat-conducting oil enters the heating chamber 501, continuously keeping the hard roller 5 warm, and then the heat-conducting oil is collected into the discharge pipe 7 through the recovery pipe 701. The discharge pipe 7 is connected to the return oil pipe 402, so that the cooled heat-conducting oil returns to the heating chamber 4 for heating, thereby realizing a heating cycle;

[0038] In the process of calendering the artificial leather, some impurities will remain on the outer surface of the hard roller 5. The hard roller 5 with impurities rotates to the side of the cleaning mechanism 3, and the impurities on the surface of the hard roller 5 are scraped off by the scraper 301. The impurities fall into the recovery box 304. If parallel inclined grooves are opened on the surface of the hard roller 5, some impurities will remain inside the parallel inclined grooves. At this time, the hard roller 5 continues to rotate, and the impurities are brought to the position of the multiple groups of nozzles 303. A sufficient amount of high-pressure gas is increased in the air distribution pipe 306 through the air inlet pipe 305. The high-pressure gas will be ejected through the nozzle 303, and the multiple groups of nozzles 303 will be discharged from the cleaning mechanism 3. The bottom end to the top end of the processing mechanism 3 are tilted in sequence, and multiple groups of nozzles 303 are arranged in parallel, and the spacing between the nozzles 303 at higher positions gradually increases. When the hard roller 5 is aligned with the nozzle head 303 at the lowest end, the nozzle head 303 blows and cleans the parallel inclined grooves in the middle part of the hard roller 5. Then the hard roller 5 continues to rotate and aligns with the multiple groups of nozzles 303 with increasing spacing in sequence. The multiple groups of nozzles 303 also blow and clean the parallel inclined grooves of the hard roller 5, so that impurities are discharged from the parallel inclined grooves and finally enter the recovery box 304 through the discharge chute 302, which is convenient for cleaning the hard roller 5.

[0039] And when the cleaning mechanism 3 is installed above the heating chamber 4, the air flow enters the multi-component air pipe 306, and the air flow can be heated by the waste heat generated by the heating chamber 4, so that the temperature of the air flow sprayed on the outside of the hard roller 5 will not be too low, reducing the cooling of the hard roller 5, and no additional heating energy is needed, which plays a role in energy saving.

[0040] Although an embodiment of the present invention has been shown and described, this specific embodiment is merely an explanation of the present invention and is not a limitation of the invention. The specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions and variations to the embodiment without creative contribution as needed without departing from the principles and purpose of the present invention. However, as long as they are within the scope of the claims of the present invention, they are protected by patent law.

Claims

1. A calender for PVC artificial leather, comprising two sets of support frames, with a soft roller and a hard roller connected between the two sets of support frames, characterized in that: A heating bin is provided inside the central shaft, a central shaft is installed inside the hard roller, and both ends of the central shaft extend to the outside of the hard roller, the top end of the central shaft is located at the inner wall of the hard roller and a spray groove is provided, an extrusion plate is provided at the edge of the spray groove, and a heating layer is formed between the extrusion plate and the inner wall of the hard roller, the spray groove is aligned with the top end of the central shaft, and a spray groove is provided at the edge of the spray groove, two ends of the central shaft are respectively connected with a connecting pipe and a discharge pipe, the bottom end of the discharge pipe is connected with multiple groups of recovery pipes, and each group of recovery pipes passes through the central shaft and extends to the inside of the heating bin, a cleaning mechanism is installed at the bottom end of the hard roller, the cleaning mechanism cleans impurities on the surface of the hard roller, a heating chamber is installed below the cleaning mechanism, a heating pipe and an oil return pipe are connected to the side of the heating chamber, the heating pipe is connected to the heating pipe and the connecting pipe, and the oil return pipe is connected to the discharge pipe; The top end of the cleaning mechanism is connected with a scraper; The cleaning mechanism is provided with a plurality of pairs of nozzles on the side away from the scraper, wherein each pair of nozzles is sequentially arranged on the inner wall of the nozzle from top to bottom, and the spacing between each pair of nozzles gradually increases from bottom to top; The outer side of the bottom end of the cleaning mechanism is connected with an air distribution pipe, which is connected to each pair of nozzles. The side of the air distribution pipe is connected with an air intake pipe, which is connected to an external high-pressure air source.

2. A calender for PVC artificial leather according to claim 1, characterized in that: An anti-rolling rod is connected between the two groups of support frames, and the anti-rolling rod is located outside the tangent position of the soft roller and the hard roller. The bottom end of the support frame is connected to the base, the heating chamber is installed at the top of the base, and the hard roller is rotatably connected to the base.

3. The calender for PVC artificial leather according to claim 1, characterized in that: A heating plate is installed inside the heating chamber, and the interior of the heating chamber is filled with heat-conducting oil. Both the heating pipe and the oil return pipe are installed with an oil pump, which provides a power source for the heat-conducting oil.

4. The calender for PVC artificial leather according to claim 1, characterized in that: The scraper is fitted with the outer wall of the hard roller, a feeding chute is provided at the bottom end of the cleaning mechanism, a recovery box is provided below the cleaning mechanism, the recovery box is located below the scraper and the feeding chute, and the recovery box recovers impurities.

5. The calender for PVC artificial leather according to claim 1, characterized in that: Through holes are provided on both sides of the recovery pipe, and the heat transfer oil inside the heating chamber enters the interior of the recovery pipe through the through holes.

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