Synthetic leather foaming device

Abstract

The utility model relates to a kind of synthetic leather foaming equipment.It includes: base cloth feeding roller, coating unit, foaming unit, shaping unit, drying unit and winding roller;The foaming unit is made of foaming cover, first heating platform, electric heating stick group and reflector cover;The shaping unit is made of bottom roll rack, several guide rods, top roll rack and top plate;The drying unit is made of drying cover, second heating platform and several air-blowing module group.The utility model is equipped with foaming unit, shaping unit, drying unit, wherein foaming unit utilizes electric heating stick and heating platform combination heating mode to heat synthetic leather semi-finished product, temperature control is more accurate and uniform, shaping unit is used to flatten synthetic leather semi-finished product and accurate thickness, drying unit finally carries out drying treatment to synthetic leather semi-finished product, the utility model is applicable to the foaming treatment of continuous strip-shaped synthetic leather product, and production efficiency is high.

Description

Technical Field

[0001] This utility model relates to a heating device, and more particularly to a synthetic leather foaming device. Background Technology

[0002] With the continuous development of technology, synthetic leather is gradually being used, including water-based polyurethane synthetic leather. Synthetic leather is a plastic product that simulates the composition and structure of natural leather and can be used as a substitute for it. It is usually foamed using a foaming agent during the production process, and the surface of the synthetic leather needs to be heated during the foaming process.

[0003] Currently, hot air equipment is generally used to heat the surface of synthetic leather. However, because the hot air outlet is fixed, the side of the synthetic leather facing the hot air is hotter than the side not facing the hot air, which can easily lead to uneven heating and potentially affect the quality of the finished product. To address this, a patent has been disclosed entitled "A Water-Based Synthetic Leather Foaming Device" (CN219563927U). This device includes: a heating furnace for heating the synthetic leather; a hot air device located on top of the heating furnace for heating the synthetic leather; and a rotating component located inside the heating furnace for supporting and rotating the synthetic leather to achieve uniform heating throughout. This patent utilizes the rotating component to rotate the synthetic leather, allowing all parts of the leather to be close to the hot air device during heating, thus achieving uniform heating throughout the synthetic leather.

[0004] However, this equipment is only suitable for heating single pieces of leather and cannot be used for continuous strips of synthetic leather products. It has poor applicability and extremely low production efficiency, making it unsuitable for large-scale industrial production. Summary of the Invention

[0005] This invention provides a synthetic leather foaming device, which solves the problems of low production efficiency and unsuitability for large-scale industrial production of synthetic leather foaming devices in the prior art.

[0006] The above-mentioned technical problems of this utility model are mainly solved by the following technical solution: a synthetic leather foaming device, comprising: a base fabric feeding roller, a coating unit, a foaming unit, a shaping unit, a drying unit, and a winding roller, wherein the base fabric on the base fabric feeding roller flows sequentially through the coating unit, the foaming unit, the shaping unit, and the drying unit and is then wound up by the winding roller; the foaming unit is composed of a foaming outer cover, a first heating platform, an electric heating rod assembly, and a reflector, wherein the reflector is fixed to the top of the foaming outer cover, the electric heating rod assembly is installed below the reflector, and the first heating platform is located below the electric heating rod assembly; The shaping unit consists of a bottom roller frame, several guide rods, a top roller frame, and a top plate. Several bottom rollers of equal height are controllably rotatably mounted on the bottom roller frame. Several guide rods are vertically fixed between the bottom roller frame and the top plate. The top roller frame is slidably mounted on the guide rods. Several top rollers of equal height are controllably rotatably mounted on the top roller frame. A shim can be replaced between the bottom roller frame and the top roller frame. An elastic element is provided between the top roller frame and the top plate. The drying unit consists of a drying hood, a second heating platform, and several blower modules. Both the first and second heating platforms are electrically controlled.

[0007] This invention integrates a coating unit, a foaming unit, a shaping unit, and a drying unit, corresponding to the coating process, foaming process, shaping process, and drying and setting process. Specifically, the coating unit can coat one side of the flowing base fabric, so that the base fabric is evenly coated with water-based polyurethane slurry. After coating, the base fabric continues to flow into the foaming unit under the traction of the take-up roller. The first heating platform in the foaming unit can heat the bottom surface of the base fabric. The heating rod assembly can directly heat the coating through thermal radiation. The reflector can reflect the thermal radiation emitted by the heating rod assembly, which can improve the heat utilization rate. Since the thermal radiation is relatively uniform, it is only necessary to control the temperature difference of each heating rod to be as small as possible and ensure that the distance between the heating rod and the base fabric is as uniform as possible to ensure a uniform heating effect. The water-based polyurethane slurry will be heated to the range of 120-150 degrees Celsius, thereby fully... The foaming process is uniform, but the thickness of the foamed product cannot be precisely controlled, and the surface flatness is also poor. After foaming, the semi-finished product continues to flow to the shaping unit. The distance between the top roller and the bottom roller is fixed. Therefore, after the flexible semi-finished product passes through the top roller and the bottom roller multiple times, the thickness of the semi-finished product is uniform and the surface flatness is good. Then the semi-finished product continues to flow to the drying unit. The second heating platform in the drying unit can continue to heat the bottom surface of the semi-finished product, while the blower module blows air onto the surface of the semi-finished product. The blower module is equipped with a blower and heating wire, so the blown air is hot air, which is used to accelerate the drying of the semi-finished product. When the base fabric flows out of the drying unit, the synthetic leather on the base fabric is completely dried and shaped, and then it is wound up by the winding roller.

[0008] Meanwhile, the shaping unit in this utility model has an adjustable gap function. By replacing the pads of different thicknesses, the gap between the top roller and the bottom roller can be changed, while the elastic element is always in a state of being compressed and deformed, thereby applying a downward preload to the top roller frame in real time to prevent the top roller frame from being squeezed by the synthetic leather and causing it to lift up.

[0009] Therefore, this utility model has the following characteristics compared with the prior art: 1. This utility model is provided with a foaming unit, a shaping unit, and a drying unit. The foaming unit uses a combination of electric heating rods and heating platforms to heat the synthetic leather semi-finished product, and the temperature control is relatively precise and uniform. The shaping unit is used to flatten the synthetic leather semi-finished product and accurately measure its thickness. The drying unit finally dries the synthetic leather semi-finished product. This utility model is suitable for the foaming treatment of continuous strip synthetic leather products and has high production efficiency. Attached Figure Description

[0010] Appendix Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] Appendix Figure 2 This is another structural schematic diagram of the coating unit;

[0012] Appendix Figure 3 This is another structural schematic diagram of the foaming unit;

[0013] Appendix Figure 4 This is a schematic diagram of the third structure of the shaping unit;

[0014] Appendix Figure 5 This is a top view of the drying unit;

[0015] Appendix Figure 6 This is a partial structural diagram of the shaping unit;

[0016] Appendix Figure 7 This is a schematic diagram of the raised block structure. Detailed Implementation

[0017] The technical solution of this utility model will be further described in detail below through embodiments and in conjunction with the accompanying drawings.

[0018] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0019] Example 1: See Figure 1 A synthetic leather foaming device includes: a base fabric feeding roller 10, a guide roller 20, a coating unit 100, a foaming unit 200, a shaping unit 300, a drying unit 400, and a take-up roller 30. The base fabric on the base fabric feeding roller flows sequentially through the coating unit, the foaming unit, the shaping unit, and the drying unit before being wound up by the take-up roller. Figure 3 The foaming unit consists of a foaming cover 210, a first heating platform 220, an electric heating rod assembly 230, and a reflector 240. The reflector 240 has several mounting slots 241 formed on it. The reflector is fixed to the top of the foaming cover. The electric heating rod assembly is installed in the mounting slots, and the first heating platform is located below the electric heating rod assembly. (See...) Figure 4 The shaping unit consists of a bottom roller frame 310, several guide rods 320, a top roller frame 330, and a top plate 340. Several bottom rollers 350 with equal height arrays are controllably rotatable on the bottom roller frame. Several guide rods are vertically fixed between the bottom roller frame and the top plate. The top roller frame is slidably mounted on the guide rods. Several top rollers 360 with equal height arrays are controllably rotatable on the top roller frame. A shim 370 can be replaced between the bottom roller frame and the top roller frame. An elastic element 380 is provided between the top roller frame and the top plate. Figure 5 The drying unit consists of a drying cover 410, a second heating platform 420, and several blower modules 430. Both the first and second heating platforms are electrically controlled for heating, and the blower modules blow air in an oblique rearward direction.

[0020] In this embodiment, both the first and second heating platforms can be customized, and the heating rod assembly and the blower module can also be purchased. The heating rod is preferably an electric heating quartz rod. The temperature of the first heating platform and the heating rod assembly is controlled within the range of 135±10 degrees Celsius, and the temperature of the second heating platform and the blower module is controlled within the range of 70±10 degrees Celsius.

[0021] This embodiment integrates a coating unit, a foaming unit, a shaping unit, and a drying unit, corresponding to the coating process, foaming process, shaping process, and drying and setting process. Specifically, the coating unit can coat one side of the flowing base fabric, so that the water-based polyurethane slurry is evenly coated on the base fabric. After coating, the base fabric continues to flow towards the foaming unit under the traction of the take-up roller. The first heating platform in the foaming unit can heat the bottom surface of the base fabric. The heating rod assembly can directly heat the coating through thermal radiation. The reflector can reflect the thermal radiation emitted by the heating rod assembly, which can improve the heat utilization rate. Since the thermal radiation is relatively uniform, it is only necessary to control the temperature difference of each heating rod to be as small as possible and ensure that the distance between the heating rod and the base fabric is as uniform as possible to ensure a uniform heating effect. The water-based polyurethane slurry will be heated to the range of 120-150 degrees Celsius, thereby fully... The foaming process is uniform, but the thickness of the foamed product cannot be precisely controlled, and the surface flatness is also poor. After foaming, the semi-finished product continues to flow to the shaping unit. The distance between the top roller and the bottom roller is fixed. Therefore, after the flexible semi-finished product passes through the top roller and the bottom roller multiple times, the thickness of the semi-finished product is uniform and the surface flatness is good. Then the semi-finished product continues to flow to the drying unit. The second heating platform in the drying unit can continue to heat the bottom surface of the semi-finished product, while the blower module blows air onto the surface of the semi-finished product. The blower module is equipped with a blower and heating wire, so the blown air is hot air, which is used to accelerate the drying of the semi-finished product. When the base fabric flows out of the drying unit, the synthetic leather on the base fabric is completely dried and shaped, and then it is wound up by the winding roller.

[0022] See Figure 4 A vertically upward-pointing pull rod 390 is fixed on the top roller platform, penetrating the top plate. A limit cap 391 is screwed onto the top of the pull rod, and the limit cap can abut against the top plate vertically. When it is necessary to replace the shim, the top roller platform needs to be raised first. However, due to the presence of the elastic element, raising the top roller platform is difficult. Therefore, this embodiment uses the above-mentioned technical solution to adjust the relative position between the pull rod and the limit cap by rotating the limit cap. Since the limit cap is restricted to the upper surface of the top plate, when the limit cap is tightened, the pull rod will be pulled upward, thereby driving the top roller platform to move upward as a whole. After the shim is replaced, the limit cap can be rotated in the opposite direction until the limit cap separates from the top plate.

[0023] See Figure 6 An upper boss 331 protrudes from the bottom surface of the top roller frame and from the outer periphery of the guide rod, and a lower boss 311 protrudes from the top surface of the bottom roller frame and from the outer periphery of the guide rod. The upper and lower bosses are provided to facilitate machining to obtain two flat contact surfaces for tight fit with the shim block.

[0024] See Figure 7Two columns 312 are vertically fixed on the lower protrusion. The shim block is provided with a slot 371 that matches the outer diameter of the guide rod. The outer wall of the shim block is also provided with two limiting grooves 372 that match the two columns. When the two limiting grooves are engaged with the two columns, the shim block is fixed on the outside of the corresponding guide rod.

[0025] See Figure 6 Each guide rod is fitted with a guide sleeve 321, and the top roller frame is provided with a guide sleeve hole 332 for installing the guide sleeve. The guide sleeve hole is provided with a journal 333 for limiting the position of the guide sleeve.

[0026] See Figure 2 The coating unit consists of a hopper 110, an intermediate roller 120, a coating roller 130, and a support roller 140. The support roller pulls the base fabric backward. The intermediate roller and the coating roller rotate in the same direction, and a gap is formed between the two rollers. The coating roller is located directly above the support roller and rotates in the opposite direction. The coating unit is an existing mature piece of equipment, and its remaining specific structure will not be described in detail here.

[0027] This invention can be modified in many ways, as will be apparent to those skilled in the art, and such modifications are not considered to depart from the scope of this invention. All such modifications that are obvious to those skilled in the art are included within the scope of these claims.

Claims

1. A synthetic leather foaming device, characterized in that, include: The system comprises a base fabric feeding roller, a coating unit, a foaming unit, a shaping unit, a drying unit, and a take-up roller. The base fabric on the base fabric feeding roller flows sequentially through the coating unit, the foaming unit, the shaping unit, and the drying unit before being taken up by the take-up roller. The foaming unit consists of a foaming cover, a first heating platform, a heating rod assembly, and a reflector. The reflector is fixed to the top of the foaming cover, the heating rod assembly is installed below the reflector, and the first heating platform is located below the heating rod assembly. The shaping unit consists of a bottom roller frame. The unit comprises several guide rods, a top roller frame, and a top plate. Several bottom rollers of equal height are controllably rotatably mounted on the bottom roller frame. Several guide rods are vertically fixed between the bottom roller frame and the top plate. The top roller frame is slidably mounted on the guide rods. Several top rollers of equal height are controllably rotatably mounted on the top roller frame. A shim can be replaced between the bottom roller frame and the top roller frame. An elastic element is provided between the top roller frame and the top plate. The drying unit comprises a drying hood, a second heating platform, and several blower modules.

2. The synthetic leather foaming equipment according to claim 1, characterized in that: A vertically upward-facing pull rod is fixed on the top roller platform. The pull rod passes through the top plate, and a limit cap is screwed to the top of the pull rod. The limit cap can abut against the top plate from above and below.

3. The synthetic leather foaming equipment according to claim 2, characterized in that: An upper boss is provided on the bottom surface of the top roller frame and in the outer peripheral area of ​​the guide rod, and a lower boss is provided on the top surface of the bottom roller frame and in the outer peripheral area of ​​the guide rod.

4. The synthetic leather foaming equipment according to claim 3, characterized in that: Two columns are vertically fixed on the lower protrusion. The shim block has a slot that matches the outer diameter of the guide rod. The outer side wall of the shim block also has two limiting grooves that match the two columns. When the two limiting grooves engage with the two columns, the shim block is fixed to the outside of the corresponding guide rod.

5. The synthetic leather foaming equipment according to claim 1, characterized in that: The coating unit consists of a hopper, an intermediate roller, a coating roller, and a carrier roller. The carrier roller can pull the base fabric backward. The intermediate roller and the coating roller rotate in the same direction and a gap is formed between the two rollers. The coating roller is located directly above the carrier roller and rotates in the opposite direction.

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