Artificial leather foaming furnace and working method thereof

Abstract

The present invention discloses an artificial leather foaming furnace and a working method thereof. The artificial leather foaming furnace of the present invention comprises: a linear foaming furnace section, wherein a conveying needle belt is arranged in the linear foaming furnace section, wherein the conveying needle belt conveys the artificial leather material belt horizontally through a high temperature section and a cooling section on both sides; a preheating chamber, wherein the preheating chamber is arranged on the feeding port of the linear foaming furnace section, wherein the height of the preheating chamber is greater than that of the linear foaming furnace section, wherein the artificial leather material belt is conveyed by turning up and down through a conveying roller in the preheating chamber; wherein a heating component is used in the preheating chamber to heat the artificial leather material belt at a low temperature; and an exhaust duct, wherein the exhaust duct is arranged above the linear foaming furnace section, wherein the exhaust end of the exhaust duct is connected to the side wall of the preheating chamber and the top wall of the linear foaming furnace section. The present invention adopts a pre-preheating chamber to centrally heat the artificial leather material belt in the initial section, thereby effectively shortening the length of the foaming furnace and saving the space occupied by the equipment.

Description

Technical Field

[0001] The invention relates to the technical field of artificial leather production equipment, in particular to an artificial leather foaming furnace and a working method thereof. Background Art

[0002] In the process of producing PVC artificial leather by calendaring, the foaming furnace plays a vital role. The foaming furnace is a key equipment for foaming in the production process of PVC artificial leather. Through foaming, the PVC artificial leather can be made lighter and softer, and its leather feel can be enhanced when rubbing. The foaming furnace heats and controls the temperature to make the PVC resin and the foaming agent react chemically under specific conditions, thereby generating bubbles and solidifying to form a PVC artificial leather with a porous structure.

[0003] The existing foaming furnace adopts zoned temperature control, and multiple different temperature sections are arranged continuously, which are often long, generally more than 30 meters. The length of the foaming furnace ensures that the foaming agent has enough time and space to decompose and release gas to form bubbles in the PVC resin, which is the key to the foaming process. Another reason for the long length of the foaming furnace is that the calendered artificial leather material strip is transported in the foaming furnace in a horizontal straight line with a needle belt fixed edge. However, the applicant has been engaged in the production of artificial leather for a long time and realized that although the existing temperature zone control can achieve better foaming and thickening effects, the foaming furnace is too long, requiring a longer workshop, occupying a larger workshop area, and is not conducive to expanding the scale of production.

[0004] In order to overcome the above problems, a kind of artificial leather foaming furnace and its working method are needed. Summary of the invention

[0005] The purpose of the present invention is to provide an artificial leather foaming furnace and a working method thereof, which adopts a front preheating chamber to centrally heat the artificial leather material strip in the initial section, effectively shortening the length of the foaming furnace and saving equipment space.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention discloses an artificial leather foaming furnace, comprising:

[0008] A linear foaming furnace section, wherein a conveying needle belt is arranged in the linear foaming furnace section, and the conveying needle belt conveys the artificial leather material belt horizontally through a high temperature section and a cooling section on both sides;

[0009] A preheating chamber, wherein the preheating chamber is arranged on the feeding port of the linear foaming furnace section, the height of the preheating chamber is greater than the linear foaming furnace section, and the artificial leather material strip is transported in the preheating chamber by the conveying roller shaft turning up and down; a heating component is used in the preheating chamber to heat the artificial leather material strip at a low temperature;

[0010] An exhaust duct is arranged above the linear foaming furnace section, and an exhaust end of the exhaust duct is connected to the side wall of the preheating chamber and the top wall of the linear foaming furnace section.

[0011] Furthermore, upper rollers and lower rollers are horizontally arranged in the preheating chamber, a plurality of lower rollers are evenly spaced at the middle of the preheating chamber, a plurality of upper rollers are evenly spaced at the upper part of the preheating chamber, and the artificial leather strip reciprocates up and down between the upper rollers and the lower rollers.

[0012] Furthermore, it also includes an upper roller shaft frame and an action cylinder, wherein the action cylinder head is installed downward at the middle position of the top wall of the preheating chamber, the end of the piston rod of the action cylinder is connected to the upper roller shaft frame, and the upper roller shaft frame mounts all the upper roller shafts.

[0013] Furthermore, the heating component includes a hot air blower and an air distribution component, the hot air blower is arranged at the lower part of the preheating chamber, and the air outlet of the hot air blower is connected to the air distribution component; the number of the air distribution components is multiple, and the multiple air distribution components are arranged at intervals between the vertically transmitted artificial leather material strips.

[0014] Furthermore, the air distribution assembly includes a plate body, a bottom cross beam, a mounting plate and a pipe joint, the plate body is centrally arranged in the middle position of the top surface of the bottom cross beam, and the two ends of the bottom cross beam are mounted on the side walls of the preheating chamber through the mounting plate; a blowing port is arranged on the side wall of the plate body facing the artificial leather material strip; the blowing port is connected to the pipe joint through the internal channels of the plate body and the bottom cross beam, and the pipe joint is connected to the air outlet of the hot air blower through a hose.

[0015] Furthermore, the air distribution component also includes an air distribution hole plate, which is arranged on the side wall of the plate body; a plurality of air outlet holes are evenly opened on the air distribution hole plate, and the air outlet holes face the surface of the artificial leather material strip.

[0016] Furthermore, the heating component also includes a distribution pipe fitting, the input end of the distribution pipe fitting is connected to the air outlet of the hot air blower, and the output ports of the distribution pipe fitting are multiple and the number is consistent with the number of the air distribution components and are arranged one-to-one; the output port of the distribution pipe fitting is connected to the pipe joint through a hose.

[0017] Furthermore, an openable protective cover is provided at one end of the linear foaming furnace section facing the preheating chamber, and the openable protective cover is provided on the top of the linear foaming furnace section; an isolation plate is provided between the linear foaming furnace section and the preheating chamber.

[0018] Furthermore, a temperature sensor is arranged in the cavity of the preheating chamber, and the temperature sensor feeds back the cavity temperature to the equipment control system; and a window is arranged on the side wall of the preheating chamber.

[0019] The present invention also discloses a working method of an artificial leather foaming furnace, wherein the artificial leather foaming furnace described in any one of the above items is used to dry and foam the calendered artificial leather material strip, and the artificial leather material strip that is transported in a reverse direction up and down is preheated at a low temperature through a preheating chamber, thereby reducing the horizontal transport length.

[0020] Compared with the prior art, the beneficial technical effects of the present invention are:

[0021] The artificial leather foaming furnace of the present invention increases the storage amount and retention time of the artificial leather strip in the preheating chamber by adding a preheating chamber with increased height to the feeding port of the linear foaming furnace section, and performs up and down folding in the height direction to convey the artificial leather strip, thereby ensuring that the artificial leather strip is heated to the set temperature before entering the linear foaming furnace section. The low-temperature section is heated centrally, which can greatly reduce the length of the equipment compared to linear heating, and the centralized heating also improves the heating efficiency. The artificial leather foaming furnace of the present invention uses a preheating chamber to centrally heat the artificial leather strip in the initial section, which effectively shortens the length of the foaming furnace and saves equipment space.

[0022] In addition, through the staggered arrangement of multiple upper rollers and multiple lower rollers, the artificial leather material strip can be transported back and forth multiple times in the vertical direction, thereby increasing the amount of material stored in the preheating chamber of the artificial leather material strip; through the upper roller shaft frame and the action cylinder, all the upper roller shafts can be lifted and lowered, thereby increasing or reducing the distance between the upper roller shaft and the lower roller shaft, changing the amount of material stored and the time for the material to pass through the preheating chamber, in order to obtain the best production efficiency. By adopting the hot air circulation method to blow hot air to heat the artificial leather material strip, it is only necessary to control the temperature of the hot air at the outlet of the hot air blower to achieve the upper limit of the temperature control, and the problem of causing local melting of PVC resin will not occur. By setting the plate body of the air distribution component between the artificial leather material strips conveyed vertically, hot air can be blown out to the artificial leather material strips on both sides at the same time. By setting the air distribution hole plate, the uniformity of the air distribution can be increased to ensure uniform heating of the artificial leather material strip. By adding distribution pipes, the air volume can be evenly distributed to multiple air distribution components. By setting an openable protective cover at one end of the online foaming furnace section toward the preheating chamber, on the one hand, it is convenient to maintain the roller brush wheel, which presses the edge of the artificial leather material strip into the needle of the conveying needle belt; on the other hand, the temperature of the artificial leather material strip output from the preheating chamber can be intuitively measured, and timely adjustment can be made when it is not appropriate. By adding the temperature sensor in the chamber of the preheating chamber, the chamber temperature can be controlled, thereby ensuring that the temperature is in a stable and controllable state; by adding a window on the side wall of the preheating chamber, it is convenient to observe the conveying condition of the internal artificial leather material strip. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The present invention will be further described below in conjunction with the accompanying drawings.

[0024] Figure 1 It is a schematic diagram of the main structure of the artificial leather foaming furnace of the present invention;

[0025] Figure 2 It is a schematic diagram of the front view structure of the air distribution component in the present invention.

[0026] Explanation of the reference numerals: 1. Linear foaming furnace section; 101. Conveying needle belt; 102. Opening shield; 2. Exhaust duct; 3. Preheating chamber; 301. Exhaust port; 4. Upper roller frame; 5. Upper roller shaft; 6. Lower roller shaft; 7. Action cylinder; 8. Hot air blower; 9. Air distribution assembly; 901. Bottom beam; 902. Mounting plate; 903. Pipe joint; 904. Air distribution hole plate; 10. Distribution pipe fittings; 11. Artificial leather material belt. DETAILED DESCRIPTION

[0027] The core of the present invention is to provide an artificial leather foaming furnace and a working method thereof, which adopts a front preheating chamber to centrally heat the artificial leather material strip in the initial section, effectively shortening the length of the foaming furnace and saving equipment space.

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In a specific embodiment, Figure 1 and Figure 2 As shown, the artificial leather foaming furnace of the present invention comprises:

[0031] A linear foaming furnace section 1 is provided with a conveying needle belt 101, which is horizontally conveyed on both sides of the artificial leather material belt 11 through the high temperature section and the cooling section. Consistent with the existing foaming furnace device, a circulating chain is used to drive the conveying needle belt 101, and the edges of both sides of the artificial leather material belt 11 are inserted into the needles of the conveying needle belt 101. The specific structure is consistent with the existing equipment and will not be repeated here. The temperature of the specific high temperature section is controlled at 130-155°C, so that the PVC resin melts and the foaming agent does not violently decompose and release gas.

[0032] Preheating chamber 3, preheating chamber 3 is arranged on the feeding port of linear foaming furnace section 1, and the height of preheating chamber 3 is greater than that of linear foaming furnace section 1. Generally speaking, the height of linear foaming furnace section 1 is about 1.8 meters, and the height of preheating chamber is set to be not less than 3 meters. Artificial leather material strip 11 is transported in preheating chamber 3 by conveying roller shaft by turning up and down. By turning up and down, the amount of material stored in preheating chamber 3 can be increased and the retention time of material in preheating chamber 3 can be increased. A heating component is used in preheating chamber 3 to heat artificial leather material strip 11 at low temperature. The heating temperature in preheating chamber 3 is controlled to be 80-105℃, the surface of PVC resin is still solid and does not melt, and the mixed foaming agent will not decompose, which is convenient for conveying by conveying roller shaft.

[0033] Exhaust duct 2 is horizontally erected above the linear foaming furnace section 1, and the exhaust end of the exhaust duct 2 is connected to the side wall of the preheating chamber 3 and the top wall of the linear foaming furnace section 1. The exhaust duct 2 adopts a negative pressure exhaust method to remove the waste gas generated during the heating and foaming process to prevent the waste gas from entering the processing workshop.

[0034] By adding a preheating chamber 3 with an increased height to the feeding port of the linear foaming furnace section 1 and conveying the artificial leather material strip 11 by turning up and down in the height direction, the storage amount and retention time of the artificial leather material strip 11 in the preheating chamber 3 can be increased, ensuring that the artificial leather material strip 11 is heated to the set temperature before entering the linear foaming furnace section 1. The low-temperature section is heated centrally, which can greatly reduce the length of the equipment compared to linear heating, and the centralized heating also improves the heating efficiency. The artificial leather foaming furnace of the present invention uses a preheating chamber to centrally heat the artificial leather material strip in the initial section, which effectively shortens the length of the foaming furnace and saves equipment space.

[0035] In a specific embodiment of the present invention, Figure 1 As shown, an upper roller 5 and a lower roller 6 are horizontally arranged in the preheating chamber 3, and a plurality of lower rollers 6 are arranged at equal intervals in the middle of the preheating chamber 3, and a plurality of upper rollers 5 are arranged at equal intervals in the upper part of the preheating chamber 3. The upper roller 5 and the lower roller 6 are staggered by one roller diameter. The artificial leather material strip 11 passes back and forth between the upper roller 5 and the lower roller 6.

[0036] Specifically, if Figure 1 As shown, the artificial leather foaming furnace of the present invention further includes an upper roller shaft frame 4 and an action cylinder 7, the action cylinder 7 is mounted head-down at the middle position of the top wall of the preheating chamber 3, the piston rod end of the action cylinder 7 is connected to the upper roller shaft frame 4, and the upper roller shaft frame 4 is mounted with all the upper roller shafts 5. A vertical guide mechanism is arranged between the upper roller shaft frame 4 and the side wall of the preheating chamber 3, ensuring that the action cylinder 7 drives the upper roller shaft frame 4 to perform reciprocating linear motion along the vertical direction.

[0037] By staggering the arrangement of multiple upper rollers 5 and multiple lower rollers 6, the artificial leather material strip 11 can be transported back and forth multiple times in the vertical direction, thereby increasing the storage amount of the artificial leather material strip 11 in the preheating chamber 3; through the upper roller shaft frame 4 and the working cylinder 7, all the upper rollers 5 can be lifted and lowered, thereby increasing or decreasing the distance between the upper rollers 5 and the lower rollers 6, changing the storage amount and the time for the material to pass through the preheating chamber 3, so as to obtain the best production efficiency.

[0038] In a specific embodiment of the present invention, Figure 1 and Figure 2 As shown, the heating assembly includes a hot air blower 8 and an air distribution assembly 9. The hot air blower 8 is arranged at the lower part of the preheating chamber 3, and the air outlet of the hot air blower 8 is connected to the air distribution assembly 9. There are multiple air distribution assemblies 9, and the multiple air distribution assemblies 9 are arranged at intervals between the vertically transmitted artificial leather material strips 11, and the air distribution assembly 9 blows hot air toward the artificial leather material strips 11.

[0039] Obviously, the heating component can also adopt a heating lamp to radiate and heat the vertically transmitted artificial leather material strip 11 by light radiation. Compared with the hot air method, this method is not easy to control the heating temperature, but it can also achieve the purpose of heating. Similar simple replacement methods all fall within the protection scope of the present invention.

[0040] Specifically, if Figure 1 and Figure 2 As shown, the air distribution assembly 9 includes a plate body, a bottom cross beam 901, a mounting plate 902 and a pipe joint 903. The plate body is centrally arranged in the middle of the top surface of the bottom cross beam 901, and both ends of the bottom cross beam 901 are mounted on the side wall of the preheating chamber 3 through the mounting plate 902, and the mounting plate 902 is connected to the side wall of the preheating chamber 3 by bolts. A blowing port is arranged on the side wall of the plate body facing the artificial leather material strip 11, and the blowing port is connected to the pipe joint 903 through the internal channel of the plate body and the bottom cross beam 901, and the pipe joint 903 is connected to the air outlet of the hot air blower 8 through a hose.

[0041] Specifically, if Figure 1 and Figure 2As shown, the air distribution component 9 further comprises an air distribution hole plate 904, which is arranged on the side wall of the plate body. A plurality of air outlet holes are evenly opened on the air distribution hole plate 904, and the air outlet holes face the surface of the artificial leather material strip 11.

[0042] Specifically, if Figure 1 As shown, the heating component also includes a distribution pipe 10, the input end of the distribution pipe 10 is connected to the air outlet of the hot air blower 8, and the output ports of the distribution pipe 10 are multiple and the number is consistent with the air distribution component 9 and are arranged one-to-one; the output port of the distribution pipe 10 is connected to the pipe joint 903 through a hose.

[0043] By adopting the hot air circulation method to blow hot air to heat the artificial leather material strip 11, the upper limit of the temperature can be controlled by controlling the hot air temperature at the outlet of the hot air blower 8, and the problem of causing local melting of the PVC resin will not occur. By setting the plate body of the air distribution component 9 between the artificial leather material strips 11 conveyed vertically, hot air can be blown to the artificial leather material strips 11 on both sides at the same time. By setting the air distribution hole plate 904, the uniformity of the air distribution can be increased to ensure uniform heating of the artificial leather material strip 11. By adding a distribution pipe 10, the air volume can be evenly distributed to multiple air distribution components 9.

[0044] In a specific embodiment of the present invention, Figure 1 As shown, an openable shield 102 is provided at one end of the linear foaming furnace section 1 facing the preheating chamber 3, and the openable shield 102 is provided at the top of the linear foaming furnace section 1. An isolation plate is provided between the linear foaming furnace section 1 and the preheating chamber 3, and the artificial leather material strip 11 horizontally passes through the gap on the isolation plate and enters the linear foaming furnace section 1.

[0045] By setting an openable protective cover 102 at one end of the online foaming furnace section 1 facing the preheating chamber 3, on the one hand, it is convenient to maintain the roller brush wheel, and the roller brush wheel presses the edge of the artificial leather material belt 11 onto the needles of the conveying needle belt 101; on the other hand, the temperature of the artificial leather material belt 11 output from the preheating chamber 3 can be intuitively measured, and timely adjustments can be made when it is not appropriate.

[0046] In a specific embodiment of the present invention, a temperature sensor is provided in the chamber of the preheating chamber 3, and the temperature sensor is connected to the side wall of the preheating chamber 3 and the internal probe enters the chamber of the preheating chamber 3. The temperature sensor feeds back the chamber temperature to the equipment control system. A window is provided on the side wall of the preheating chamber 3, and the window is in a long strip shape, and the length direction is arranged along the conveying direction.

[0047] By adding the temperature sensor in the cavity of the preheating chamber 3, the cavity temperature can be controlled to ensure that the temperature is in a stable and controllable state; by adding a window on the side wall of the preheating chamber 3, it is convenient to observe the conveying situation of the internal artificial leather material strip 11, and wrinkles and folds can be dealt with in time.

[0048] In summary, the artificial leather foaming furnace of the present invention can increase the storage amount and retention time of the artificial leather strip 11 in the preheating chamber 3 by adding a preheating chamber 3 with an increased height to the feeding port of the linear foaming furnace section 1, and conveying the artificial leather strip 11 by turning up and down in the height direction, thereby ensuring that the artificial leather strip 11 is heated to the set temperature before entering the linear foaming furnace section 1. The low-temperature section is heated centrally, which can greatly reduce the length of the equipment compared to linear heating, and the centralized heating also improves the heating efficiency. The artificial leather foaming furnace of the present invention uses a preheating chamber to centrally heat the artificial leather strip in the initial section, which effectively shortens the length of the foaming furnace and saves equipment space. In addition, by staggering the arrangement of multiple upper rollers 5 and multiple lower rollers 6, the artificial leather material strip 11 can be transported back and forth multiple times in the vertical direction, thereby increasing the amount of material stored in the preheating chamber 3 of the artificial leather material strip 11; by the upper roller shaft frame 4 and the action cylinder 7, all the upper rollers 5 can be lifted and lowered, thereby increasing or reducing the spacing between the upper rollers 5 and the lower rollers 6, changing the amount of material stored and the time for the material to pass through the preheating chamber 3, so as to obtain the best production efficiency. By adopting the hot air circulation method to blow hot air to heat the artificial leather material strip 11, it is only necessary to control the temperature of the hot air at the outlet of the hot air blower 8 to achieve the upper limit control of the temperature, and the problem of causing local melting of the PVC resin will not occur. By setting the plate body of the air distribution component 9 between the artificial leather material strips 11 transported vertically, hot air can be blown out to the artificial leather material strips 11 on both sides at the same time. By setting the air distribution hole plate 904, the uniformity of the air distribution can be increased to ensure uniform heating of the artificial leather material strip 11. By adding a distribution pipe 10, the air volume can be evenly distributed to multiple air distribution components 9. By setting an openable shield 102 at one end of the online foaming furnace section 1 toward the preheating chamber 3, on the one hand, it is convenient to maintain the roller brush wheel, which presses the edge of the artificial leather material strip 11 onto the needle of the conveying needle belt 101; on the other hand, the temperature of the artificial leather material strip 11 output from the preheating chamber 3 can be intuitively measured, and timely adjustment can be made when it is not appropriate. By adding the temperature sensor in the cavity of the preheating chamber 3, the cavity temperature can be controlled, thereby ensuring that the temperature is in a stable and controllable state; by adding a window on the side wall of the preheating chamber 3, it is convenient to observe the conveying condition of the internal artificial leather material strip 11.

[0049] The present invention also discloses a method for working an artificial leather foaming furnace, wherein the artificial leather foaming furnace described in any one of the above embodiments is used to dry and foam the calendered artificial leather material strip, and the artificial leather material strip that is transported in a reverse direction up and down is preheated at a low temperature through a preheating chamber, thereby reducing the horizontal transport length. The specific working steps of the method for working an artificial leather foaming furnace of the present invention are as follows:

[0050] First, set the outlet temperature of the hot air blower 8, the chamber temperature of the preheating chamber 3, and the ejection stroke of the action cylinder 7 on the human-machine interface of the machine; the parameter range is related to the component formula and foaming requirements of the PVC artificial leather. In a specific embodiment, the outlet temperature of the hot air blower 8 is set to 90°C, and the chamber temperature of the preheating chamber 3 is set to 85°C.

[0051] Preheating, under the traction of the conveying needle belt 101, the artificial leather material belt 11 continuously enters the inner cavity of the preheating chamber 3 from the inlet of the preheating chamber 3, and is transported back and forth between the upper roller 5 and the lower roller 6. At the same time, the hot air blower 8 extracts the low-temperature air at the bottom of the preheating chamber 3 and heats it, then outputs hot air to the distribution pipe 10, and the hot air is then transported to each air distribution component 9. The hot air is evenly sprayed to the artificial leather material belt 11 on both sides through the air distribution hole plate 904, and the artificial leather material belt 11 is evenly heated. When the artificial leather material belt 11 leaves the preheating chamber 3 through the gap of the isolation plate, the temperature is about 85°C.

[0052] During high temperature foaming, when the artificial leather material strip 11 passes through the openable shield 102, the roller brush wheel presses the edge of the artificial leather material strip 11 onto the needles of the conveying needle belt 101. In the linear foaming furnace section 1, the conveying needle belt 101 conveys the artificial leather material strip 11 horizontally on both sides through the high temperature section and the cooling section to complete the foaming operation.

[0053] In a specific embodiment of the working method of the artificial leather foaming furnace of the present invention, if the preheating temperature of the artificial leather strip 11 is found to be low at the openable protective cover 102, the action cylinder 7 can be controlled to lift the upper roller frame 4, increase the distance between the upper roller shaft 5 and the lower roller shaft 6, and change the heating time of the material passing through the preheating chamber 3, thereby ensuring the preheating temperature.

[0054] In this specification, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0055] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. An artificial leather foaming furnace, characterized in that: include: A linear foaming furnace section (1), wherein a conveying needle belt (101) is arranged in the linear foaming furnace section (1), and the conveying needle belt (101) horizontally conveys the artificial leather material belt (11) through a high temperature section and a cooling section on both sides; A preheating chamber (3), wherein the preheating chamber (3) is arranged on the feeding port of the linear foaming furnace section (1), the height of the preheating chamber (3) is greater than that of the linear foaming furnace section (1), and the artificial leather material strip (11) is transported in the preheating chamber (3) by means of a conveying roller shaft that folds up and down; a heating component is used in the preheating chamber (3) to heat the artificial leather material strip (11) at a low temperature; An exhaust pipe (2), wherein the exhaust pipe (2) is arranged above the linear foaming furnace section (1), and an exhaust end of the exhaust pipe (2) is connected to the side wall of the preheating chamber (3) and the top wall of the linear foaming furnace section (1).

2. The artificial leather foaming furnace according to claim 1, characterized in that: An upper roller (5) and a lower roller (6) are horizontally arranged in the preheating chamber (3); a plurality of the lower rollers (6) are arranged at equal intervals in the middle of the preheating chamber (3); a plurality of the upper rollers (5) are arranged at equal intervals in the upper part of the preheating chamber (3); and the artificial leather material strip (11) reciprocates up and down between the upper rollers (5) and the lower rollers (6).

3. The artificial leather foaming furnace according to claim 2, characterized in that: It also comprises an upper roller shaft frame (4) and an action cylinder (7), wherein the action cylinder (7) is installed with its head facing downward at the middle position of the top wall of the preheating chamber (3), the piston rod end of the action cylinder (7) is connected to the upper roller shaft frame (4), and the upper roller shaft frame (4) is provided with all the upper roller shafts (5).

4. The artificial leather foaming furnace according to claim 2, characterized in that: The heating component comprises a hot air blower (8) and an air distribution component (9); the hot air blower (8) is arranged at the lower part of the preheating chamber (3); the air outlet of the hot air blower (8) is connected to the air distribution component (9); the number of the air distribution components (9) is multiple, and the multiple air distribution components (9) are arranged at intervals between the vertically transmitted artificial leather material strips (11).

5. The artificial leather foaming furnace according to claim 4, characterized in that: The air distribution assembly (9) comprises a plate body, a bottom cross beam (901), a mounting plate (902) and a pipe joint (903); the plate body is centrally arranged in the middle position of the top surface of the bottom cross beam (901); the two ends of the bottom cross beam (901) are mounted on the side wall of the preheating chamber (3) through the mounting plate (902); a blowing port is arranged on the side wall of the plate body facing the artificial leather material strip (11); the blowing port is connected to the pipe joint (903) through the internal channels of the plate body and the bottom cross beam (901); the pipe joint (903) is connected to the air outlet of the hot air blower (8) through a hose.

6. The artificial leather foaming furnace according to claim 5, characterized in that: The air distribution component (9) also includes an air distribution hole plate (904), and the air distribution hole plate (904) is arranged on the side wall of the plate body; a plurality of air outlet holes are evenly opened on the air distribution hole plate (904), and the air outlet holes face the surface of the artificial leather material strip (11).

7. The artificial leather foaming furnace according to claim 5, characterized in that: The heating component also includes a distribution pipe (10), the input end of the distribution pipe (10) is connected to the air outlet of the hot air blower (8), and the output ports of the distribution pipe (10) are multiple and the number is consistent with that of the air distribution components (9) and are arranged one-to-one; the output port of the distribution pipe (10) is connected to the pipe joint (903) through a hose.

8. The artificial leather foaming furnace according to claim 1, characterized in that: An openable protective cover (102) is provided at one end of the linear foaming furnace section (1) facing the preheating chamber (3), and the openable protective cover (102) is arranged on the top of the linear foaming furnace section (1); an isolation plate is provided between the linear foaming furnace section (1) and the preheating chamber (3).

9. The artificial leather foaming furnace according to claim 3, characterized in that: A temperature sensor is arranged in the cavity of the preheating chamber (3), and the temperature sensor feeds back the cavity temperature to the equipment control system; a window is arranged on the side wall of the preheating chamber (3).

10. A method for operating an artificial leather foaming furnace, characterized in that: The artificial leather foaming furnace described in any one of claims 1 to 9 is used to dry and foam the calendered artificial leather strip, and the artificial leather strip that is transported in a reverse direction up and down is preheated at a low temperature through a preheating chamber, thereby reducing the horizontal transport length.

Images