Drying device for polyurethane foam processing

Abstract

The utility model provides a drying device for polyurethane foam processing, and relates to the technical field of polyurethane foam drying, the drying device comprises a drying cylinder and a heating plate, a heating base is arranged at the bottom of the drying cylinder, a plurality of placing grooves are formed in the drying cylinder, and a plurality of flowing strip grooves are formed in the inner walls of the two sides of each placing groove; the multiple flowing strip grooves in the inner walls of the two sides of one containing groove are formed in a staggered mode; an air inlet annular groove is formed in the drying cylinder, a cylinder cover is buckled to the top of the drying cylinder, a ventilation opening is formed in the center of the cylinder cover, and an air exhaust fan is connected to the top of the cylinder cover in an assembled mode. According to the technical key points, the interior of a heating plate is powered on, so that the temperature of the heating plate is increased, heat is transferred to a drying cylinder, polyurethane foam placed in a containing groove is dried, and water vapor generated during drying is collected and discharged from the interior of a plurality of flowing strip grooves in the inner walls of the two sides of the containing groove to the center of the drying cylinder; therefore, the drying efficiency of the polyurethane foam is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of polyurethane foam drying, in particular to a drying device for polyurethane foam processing. Background Art

[0002] Polyurethane rigid foam is made of isocyanate and polyether as the main raw materials. It is mixed with special equipment under the action of various additives such as foaming agent, catalyst, flame retardant, and foamed on site by high-pressure spraying. Polyurethane foam is divided into two types: soft foam and hard foam. Soft foam has an open-cell structure, while hard foam has a closed-cell structure; soft foam is divided into two types: skinning and non-skinning.

[0003] The main function of polyurethane soft foam is cushioning. Polyurethane soft foam is commonly used in sofa furniture, pillows, cushions, toys, clothing and sound insulation lining.

[0004] Patent document with publication number CN219674599U discloses a drying device for polyurethane foam production, wherein the drying device is arranged above a combustion chamber, a plurality of heating chambers and drying tanks are arranged on the drying device, and the drying device and the combustion chamber are connected by a drainage column, and the hot air produced by the combustion chamber is transmitted to the heating chamber in the drying device through the drainage column, thereby driving the heat dissipation to dry the foam in the drying tank, and the plurality of drying tanks are connected to the drainage column in a ring shape, which greatly reduces the space, and heating chambers are arranged on both sides of each drying tank, so that the hot air wraps the foam to be dried arranged in the middle from both sides, further improving the drying efficiency;

[0005] At the same time, by setting the drying tank as a ring structure and arranging it on the drainage column, multiple groups of foams can be dried simultaneously through one combustion chamber, which greatly reduces the waste of resources. At the same time, the inner connecting plate and the drainage column are detachably connected, and different drying devices can be replaced according to the required foam shapes. The applicability of the drying device is improved while facilitating the maintenance and cleaning of the device. The drying tank is designed as a sheet structure, which better fits the shape of the foam, so that the foam can be spread flat in the drying tank and dried evenly.

[0006] However, in the process of implementing the above technical solution, it is found that the above technical solution has the following technical problems:

[0007] The existing drying device for polyurethane foam production is arranged above the combustion chamber. A plurality of heating chambers and drying tanks are arranged on the drying device. When the polyurethane foam is dried, the polyurethane foam is placed inside the drying tank for drying. In actual application, it is easily restricted by the large contact surface between the polyurethane foam and the inner wall of the drying tank, which affects the volatilization rate of the water in the polyurethane foam, thereby reducing the overall drying efficiency. Utility Model Content

[0008] In order to overcome the limitation of the existing drying devices for polyurethane foam production that are easily limited by the large contact area between the drying devices and the inner wall of the drying tank, which affects the volatilization rate of water in the polyurethane foam and thus reduces the overall drying efficiency, an embodiment of the present application provides a drying device for polyurethane foam processing, by processing a plurality of placement grooves with equal intervals around the center of a drying cylinder, and embedding a plurality of heating plates staggered with the plurality of placement grooves therein. When power is supplied to the heating plates and the temperature of the heating plates is increased to transfer heat to the drying cylinder, the polyurethane foam placed in the placement grooves can be dried, and the water vapor generated by the drying is discharged toward the center of the drying cylinder from the plurality of flow strip grooves staggered on the inner walls on both sides of the placement grooves, which is beneficial to improving the drying efficiency of the polyurethane foam.

[0009] The technical solution adopted by the embodiment of the present application to solve the technical problem is:

[0010] A drying device for processing polyurethane foam, comprising a drying cylinder and a heating plate, wherein a plurality of heating plates are provided;

[0011] Among them, a heating base is provided at the bottom of the drying cylinder, and a plurality of heating plates are evenly spaced around the center of the drying cylinder and embedded in the interior of the drying cylinder. A plurality of placement grooves are processed inside the drying cylinder, and the plurality of placement grooves are evenly spaced around the center of the drying cylinder, and one side is connected at the center of the drying cylinder, and a plurality of flow strip grooves are processed on the inner walls on both sides of the plurality of placement grooves.

[0012] In a possible implementation, a plurality of flow strip grooves on the inner wall on one side of the placement groove are arranged at equal intervals, a plurality of flow strip grooves on the inner walls on both sides of the placement groove are arranged alternately, and the sum of the heights of the plurality of flow strip grooves is greater than the height of the placement groove.

[0013] In a possible implementation, an air intake ring groove is processed inside the drying cylinder, and the air intake ring groove is located outside a plurality of surrounding placement grooves and is connected to the interior of the plurality of placement grooves.

[0014] In one possible implementation, a cylinder cover is buckled on the top of the drying cylinder, a vent is processed at the center of the cylinder cover, an exhaust fan is assembled and connected to the top of the cylinder cover, the cylinder cover is surrounded by an air inlet ring groove, and the exhaust fan draws air at the center of the drying cylinder from the bottom to the top through the vent.

[0015] In a possible implementation, two lifting rings are processed on the top surface of the cylinder cover, the two lifting rings are symmetrically arranged, and one end of the lifting ring away from the cylinder cover surface is bent from the center of the cylinder cover to the edge.

[0016] In a possible implementation, conductive copper heads are welded at the two corners of the bottom of the heating plate, and a plurality of conductive copper sleeves are arranged inside the heating base. The plurality of conductive copper sleeves are arranged in two inner and outer circles and respectively correspond to the two conductive copper heads on the plurality of heating plates, and the conductive copper heads are plug-connected inside the conductive copper sleeves.

[0017] In a possible implementation, the current inside the heating base flows from the inside of the outer circle conductive copper sleeve to the inside of the heating plate, and then flows back from the inside of the heating plate to the inside of the inner circle conductive copper sleeve to achieve circuit connectivity, thereby increasing the temperature of the heating plate.

[0018] In summary, the present invention includes at least one of the following beneficial technical effects:

[0019] 1. By processing a plurality of placement grooves around the center of the drying cylinder at equal intervals inside the drying cylinder, and embedding a plurality of heating plates staggered with the plurality of placement grooves inside the drying cylinder, when power is supplied to the heating plates to increase the temperature of the heating plates and transfer the heat to the drying cylinder, the polyurethane foam placed inside the placement grooves can be dried, and the water vapor generated by the drying is collected and discharged from the plurality of flow strip grooves staggered on the inner walls of both sides of the placement grooves to the center of the drying cylinder, which is beneficial to improving the drying efficiency of the polyurethane foam;

[0020] 2. By arranging an exhaust fan at the top of the drying cylinder and processing air intake ring grooves around the drying cylinder, air is extracted from the center of the drying cylinder to the top with the help of the exhaust fan, so that the air inside the air intake ring groove flows into the center of the drying cylinder through multiple flow grooves on the inner walls of both sides of the groove. The moisture evaporated from the polyurethane foam and discharged into the flow grooves can be taken away, thereby increasing the discharge rate of water vapor and improving the drying rate of the polyurethane foam. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is one of the exploded views of the utility model;

[0023] Figure 3 This is the second exploded view of the utility model;

[0024] Figure 4 It is a cross-sectional view of the drying drum of the utility model.

[0025] Figure numerals: 1. Exhaust fan; 2. Cylinder cover; 3. Inlet ring groove; 4. Placement groove; 5. Lifting ring; 6. Drying cylinder; 7. Heating base; 8. Conductive copper sleeve; 9. Ventilation port; 10. Heating plate; 11. Conductive copper head; 12. Flow strip groove. DETAILED DESCRIPTION

[0026] The technical solution in the embodiment of the present application is to solve the problems of the above-mentioned background technology, and the overall idea is as follows:

[0027] Embodiment 1:

[0028] This embodiment introduces a specific structure of a drying device for polyurethane foam processing. Figure 1-Figure 4 As shown, it includes a drying drum 6 and a plurality of heating plates 10, a heating base 7 is provided at the bottom of the drying drum 6, a plurality of placement grooves 4 are processed inside the drying drum 6, a plurality of flow strip grooves 12 are processed at the inner walls on both sides of the plurality of placement grooves 4, conductive copper heads 11 are welded at the two corners at the bottom of the heating plate 10, and a plurality of conductive copper sleeves 8 are provided inside the heating base 7;

[0029] Among them, multiple heating plates 10 are equally spaced around the center of the drying cylinder 6 and embedded in the drying cylinder 6. By arranging multiple conductive copper sleeves 8 in two inner and outer circles, and corresponding to two conductive copper heads 11 on the multiple heating plates 10 respectively, the conductive copper heads 11 are plug-connected to the inside of the conductive copper sleeves 8, so that the current inside the heating base 7 flows from the inside of the outer circle conductive copper sleeve 8 to the inside of the heating plate 10, and flows from the inside of the heating plate 10 back to the inside of the inner circle conductive copper sleeve 8 to achieve circuit connection. The temperature of the heating plate 10 can be increased by means of the resistance value inside the heating plate 10, and the overall heating work is performed inside the drying cylinder 6;

[0030] Secondly, by making a plurality of placement grooves 4 equally spaced around the center of the drying cylinder 6, and one side is connected at the center of the drying cylinder 6, when the polyurethane foam is placed inside the placement groove 4 for drying, the heated heating plate 10 transfers the temperature to the drying cylinder 6, thereby evaporating the water in the polyurethane foam, and the evaporated water is discharged from the inside of the polyurethane foam along the channel inside the flow strip groove 12, which is beneficial to reducing the residence time of the water around the polyurethane foam and improving the drying efficiency of the polyurethane foam;

[0031] Furthermore, in order to further improve the discharge effect of the water evaporated from the inside of the polyurethane foam when it is dried, such as Figure 4 As shown, a plurality of flow strip grooves 12 on the inner wall on one side of a placement groove 4 are arranged at equal intervals, and a plurality of flow strip grooves 12 on the inner walls on both sides of a placement groove 4 are arranged alternately. By setting the sum of the heights of the plurality of flow strip grooves 12 to be greater than the height of the placement groove 4, the polyurethane foam is placed inside the placement groove 4. When one side is supported by the inner wall of the placement groove 4, the other side is absolutely in a state of having a gap, thereby avoiding that both sides of the placement groove 4 are supported by the inner wall of the placement groove 4 at the same time, thereby reducing the evaporation effect of water on the polyurethane foam in the local area.

[0032] By adopting the above technical solution:

[0033] The above design processes a plurality of placement grooves 4 with equal spacing around the center of the drying cylinder 6, and embeds a plurality of heating plates 10 staggered with the placement grooves 4 therein. When power is supplied to the heating plates 10 to increase the temperature of the heating plates 10 and transfer heat to the drying cylinder 6, the polyurethane foam placed in the placement grooves 4 can be dried, and the water vapor generated by the drying is collected and discharged from the flow strip grooves 12 on the inner walls of the two sides of the placement grooves 4 to the center of the drying cylinder 6, which is beneficial to reducing the residence time of water around the polyurethane foam.

[0034] At the same time, because the multiple flow grooves 12 on the inner walls of both sides of a placement groove 4 are staggered, when the polyurethane foam is placed inside the placement groove 4, one side is supported by the inner wall of the placement groove 4, and the other side is left with flow grooves 12 for the volatilized water vapor to be discharged, thereby reducing the evaporation effect of water on the polyurethane foam in the local area and improving the drying efficiency of the polyurethane foam.

[0035] Embodiment 2:

[0036] Based on Example 1, this example introduces the specific structure of a drying drum 6. An air inlet ring groove 3 is machined inside the drying drum 6. A drum cover 2 is buckled on the top of the drying drum 6. A vent 9 is machined at the center of the drum cover 2. An exhaust fan 1 is assembled and connected to the top of the drum cover 2.

[0037] Among them, by making the air intake annular groove 3 located outside the plurality of placement grooves 4 arranged around and communicating with the interior of the plurality of placement grooves 4, when the periphery of the drum cover 2 is located inside the air intake annular groove 3 to avoid forming an obstruction at the top of the air intake annular groove 3, the air at the center of the drying drum 6 can be pumped from the bottom to the top by the exhaust fan 1, and after passing through the interior of the vent 9, the air is discharged from the interior of the drying drum 6;

[0038] Secondly, in order to facilitate the removal of the exhaust fan 1 from the top of the drying drum 6, the polyurethane foam that has completed the drying work in the placement tank 4 is taken out, such as Figure 2 As shown, two lifting rings 5 ​​are processed on the top surface of the cylinder cover 2. By arranging the two lifting rings 5 ​​symmetrically on the left and right, and bending the end of the lifting ring 5 away from the surface of the cylinder cover 2 from the center of the cylinder cover 2 to the edge, the two lifting rings 5 ​​are controlled to move toward the top, and the exhaust fan 1 is removed from the top of the drying cylinder 6.

[0039] By adopting the above technical solution:

[0040] The above-mentioned design processes an air intake ring groove 3 around the drying cylinder 6 so that the interior of the air intake ring groove 3 is connected with the interior of multiple placement grooves 4, and a cylinder cover 2 with an exhaust fan 1 is installed on the top of the drying cylinder 6. When the exhaust fan 1 draws air toward the top, the air at the center of the drying cylinder 6 flows toward the top, which is conducive to introducing dry gas from all around to the bottom, and when the polyurethane foam is dried inside the placement groove 4, the moisture flowing in the flow strip groove 12 is taken away, thereby increasing the rate of moisture discharge.

[0041] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. A drying device for polyurethane foam processing, characterized in that: include: Drying drum (6); A plurality of heating plates (10); A heating base (7) is provided at the bottom of the drying cylinder (6); a plurality of heating plates (10) are arranged at equal intervals around the center of the drying cylinder (6) and are embedded in the interior of the drying cylinder (6); a plurality of placement grooves (4) are processed inside the drying cylinder (6); the plurality of placement grooves (4) are arranged at equal intervals around the center of the drying cylinder (6) and are connected on one side at the center of the drying cylinder (6); and a plurality of flow strip grooves (12) are processed on the inner walls on both sides of the plurality of placement grooves (4).

2. A drying device for polyurethane foam processing as claimed in claim 1, characterized in that: A plurality of flow strip grooves (12) on the inner wall of one side of a placement groove (4) are arranged at equal intervals, and a plurality of flow strip grooves (12) on the inner walls of both sides of a placement groove (4) are arranged in a staggered manner, and the sum of the heights of the plurality of flow strip grooves (12) is greater than the height of the placement groove (4).

3. A drying device for polyurethane foam processing as claimed in claim 1, characterized in that: An air intake annular groove (3) is machined inside the drying cylinder (6), and the air intake annular groove (3) is located outside a plurality of surrounding placement grooves (4) and is connected to the interior of the plurality of placement grooves (4).

4. A drying device for polyurethane foam processing as claimed in claim 1, characterized in that: The top of the drying cylinder (6) is buckled with a cylinder cover (2), the center of the cylinder cover (2) is processed with a ventilating hole (9), and the top of the cylinder cover (2) is assembled and connected with an exhaust fan (1); The four sides of the drum cover (2) are located inside the air inlet ring groove (3), and the exhaust fan (1) draws the air at the center of the drying drum (6) from the bottom to the top through the ventilation hole (9).

5. A drying device for polyurethane foam processing as claimed in claim 4, characterized in that: Two lifting rings (5) are processed on the top surface of the cylinder cover (2), and the two lifting rings (5) are symmetrically arranged on the left and right, and the end of the lifting ring (5) away from the surface of the cylinder cover (2) is bent from the center of the cylinder cover (2) to the edge.

6. A drying device for polyurethane foam processing as claimed in claim 1, characterized in that: Conductive copper heads (11) are welded at two corners of the bottom of the heating plate (10), and a plurality of conductive copper sleeves (8) are arranged inside the heating base (7); The plurality of conductive copper sleeves (8) are arranged in two inner and outer circles and correspond to two conductive copper heads (11) on the plurality of heating plates (10) respectively, and the conductive copper heads (11) are plug-connected inside the conductive copper sleeves (8).

7. A drying device for polyurethane foam processing as claimed in claim 6, characterized in that: The current inside the heating base (7) flows from the inside of the outer circle conductive copper sleeve (8) to the inside of the heating plate (10), and then flows back from the inside of the heating plate (10) to the inside of the inner circle conductive copper sleeve (8) to achieve circuit connectivity, thereby increasing the temperature of the heating plate (10).

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