Vacuum suction plastic seat for forklift truck

Abstract

The utility model discloses a kind of vacuum plastic suction seats of fork truck, including backrest and cushion, the cushion sequentially includes seat framework, polyurethane foam layer, hot melt adhesive screen, PVC skin layer from bottom to top, the heat generated by foaming heat release reaction of polyurethane foam layer melts hot melt adhesive screen to be integrated with PVC skin layer bonding, is fixed on seat framework again by sewing, the peel strength of polyurethane foam layer and seat framework is greater than 4.0N / mm, the peel force of polyurethane foam layer and PVC skin layer is greater than 15N / 5cm.The utility model utilizes the heat generated by foaming heat release reaction of polyurethane foam layer melts hot melt adhesive screen, so that polyurethane foam layer is bonded on PVC skin layer, is fixed on seat framework again by sewing, relative to traditional use spray gun outer spray adhesive process, with higher peel force, more energy saving and environment-friendly and simple process.

Description

Technical Field

[0001] This utility model belongs to the field of seating technology, specifically relating to a forklift vacuum forming seat. Background Technology

[0002] Vacuum-formed seats offer advantages such as resistance to aging, cracking, and deformation, simple molding, and straightforward manufacturing processes, making them widely used in engineering and agricultural machinery seats. Due to the relatively harsh working environment, high durability is required for these seats. A common problem is the separation of the polyurethane foam layer from the seat frame and PVC surface, affecting the overall comfort and lifespan of the seat. A common solution is to add an adhesive layer between the foam and the surface to address the separation issue. However, this method compromises overall seat comfort, is not environmentally friendly during production, and increases costs. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a forklift vacuum forming seat.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] This utility model provides a vacuum-formed seat for forklifts, including a backrest and a seat cushion. The seat cushion comprises, from bottom to top, a seat frame, a polyurethane foam layer, a hot melt adhesive mesh, and a PVC outer layer. The polyurethane foam layer melts the hot melt adhesive mesh through the heat generated by the exothermic foaming reaction, thereby bonding it to the PVC outer layer as a whole. It is then sewn and fixed to the seat frame. The peel strength between the polyurethane foam layer and the seat frame is greater than 4.0 N / mm, and the peel force between the polyurethane foam layer and the PVC outer layer is greater than 15 N / 5 cm.

[0006] Preferably, the thickness of the polyurethane foam layer is 30-70 mm.

[0007] Preferably, the thickness of the seat frame is 2-5mm, and the material of the seat frame is selected from at least one of PVC and ABS.

[0008] Preferably, the thickness of the hot melt adhesive film is 0.6-0.9 mm.

[0009] Preferably, the thickness of the PVC skin layer is 0.8-1.5 mm.

[0010] Compared with the prior art, this utility model has the following advantages:

[0011] This invention utilizes the heat generated by the exothermic reaction of polyurethane foam layer to melt the hot melt adhesive mesh, allowing the polyurethane foam layer to adhere to the PVC surface layer, which is then sewn and fixed to the seat frame. Compared with the traditional process of using a spray gun to apply adhesive externally, this method has higher peel strength, is more energy-efficient and environmentally friendly, and has a simpler process. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of a vacuum-formed seat for forklifts according to this utility model.

[0013] In the diagram: 1 is the backrest, 2 is the seat cushion, 2-1 is the PVC outer layer, 2-2 is the hot melt adhesive mesh film, 2-3 is the polyurethane foam layer, and 2-4 is the seat frame. Detailed Implementation

[0014] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0015] In the description of this utility model, it should be understood that the terms "upper," "lower," "left," "right," etc., indicating the orientation or positional relationship are all based on the accompanying drawings. Figure 1 The orientations or positional relationships shown are 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.

[0016] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0017] Example 1

[0018] like Figure 1 As shown, this embodiment provides a forklift vacuum forming seat, including a backrest 1 and a seat cushion 2. The seat cushion 2 includes, from bottom to top, a seat frame 2-4, a polyurethane foam layer 2-3, a hot melt adhesive mesh 2-2, and a PVC surface layer 2-1. The seat cushion 2 is molded and foamed from the polyurethane foam layer 2-3. The heat generated by the exothermic reaction of foaming melts the hot melt adhesive mesh 2-2 and bonds it to the PVC surface layer 2-1. Then, the whole thing is sewn and fixed to the seat frame 2-4.

[0019] The thickness of the seat frame 2-4 is 2mm; the thickness of the polyurethane foam layer 2-3 is 30mm; the thickness of the hot melt adhesive mesh 2-2 is 0.6mm; and the thickness of the PVC surface layer 2-1 is 0.8mm.

[0020] Example 2

[0021] like Figure 1 As shown, this embodiment provides a forklift vacuum forming seat, including a backrest 1 and a seat cushion 2. The seat cushion 2 includes, from bottom to top, a seat frame 2-4, a polyurethane foam layer 2-3, a hot melt adhesive mesh 2-2, and a PVC surface layer 2-1. The seat cushion 2 is molded and foamed from the polyurethane foam layer 2-3. The heat generated by the exothermic reaction of foaming melts the hot melt adhesive mesh 2-2 and bonds it to the PVC surface layer 2-1. Then, the whole thing is sewn and fixed to the seat frame 2-4.

[0022] The thickness of the seat frame 2-4 is 3mm; the thickness of the polyurethane foam layer 2-3 is 40mm; the thickness of the hot melt adhesive mesh 2-2 is 0.8mm; and the thickness of the PVC skin layer 2-1 is 1.0mm.

[0023] Example 3

[0024] like Figure 1 As shown, this embodiment provides a forklift vacuum forming seat, including a backrest 1 and a seat cushion 2. The seat cushion 2 includes, from bottom to top, a seat frame 2-4, a polyurethane foam layer 2-3, a hot melt adhesive mesh 2-2, and a PVC surface layer 2-1. The seat cushion 2 is molded and foamed from the polyurethane foam layer 2-3. The heat generated by the exothermic reaction of foaming melts the hot melt adhesive mesh 2-2 and bonds it to the PVC surface layer 2-1. Then, the whole thing is sewn and fixed to the seat frame 2-4.

[0025] The thickness of the seat frame 2-4 is 4mm; the thickness of the polyurethane foam layer 2-3 is 60mm; the thickness of the hot melt adhesive mesh 2-2 is 0.9mm; and the thickness of the PVC skin layer 2-1 is 1.2mm.

[0026] Comparative Example 1

[0027] This embodiment provides a forklift vacuum forming seat, including a backrest 1 and a seat cushion 2. The seat cushion 2 includes a seat frame 2-4, a polyurethane foam layer 2-3, and a PVC surface layer 2-1 from bottom to top. The seat cushion 2 is made by foaming the polyurethane foam layer 2-3 onto the PVC surface layer 2-1 which has been pre-sprayed with polyurethane single-component adhesive, and then sewing and fixing it to the seat frame 2-3 as a whole.

[0028] The thickness of the seat frame 2-4 is 3mm; the thickness of the polyurethane foam layer 2-3 is 40mm; and the thickness of the PVC outer skin layer 2-1 is 1.0mm.

[0029] Table 1 Peel force test data for Examples 1-3 and Comparative Example 1

[0030] Test Project Test Standards Example 1 Example 2 Example 3 Comparative Example 1 Peel strength (N / 5cm) between polyurethane foam 2-2 and PVC skin 2-1 DIN 53357-2003 16.31 15.87 16.41 10.31 Peel strength between polyurethane foam 2-2 and seat frame 2-3 (N / mm) GB / T 2792-2014 4.4 4.2 4.3 2.4

[0031] As can be seen from Examples 1-3 and Comparative Example 1, the technical solution of the present invention effectively solves the problems of low peel strength between the polyurethane foam layer and the seat frame and PVC surface in the prior art, as well as the complex and environmentally unfriendly adhesive spraying process during production.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A forklift vacuum forming seat, characterized in that, The cushion includes a backrest (1) and a seat cushion (2). The seat cushion (2) consists of a seat frame (2-4), a polyurethane foam layer (2-3), a hot melt adhesive mesh (2-2), and a PVC surface layer (2-1) from bottom to top. The polyurethane foam layer (2-3) melts the hot melt adhesive mesh (2-2) through the heat generated by the exothermic foaming reaction, thereby bonding it to the PVC surface layer (2-1) as a whole. It is then sewn and fixed to the seat frame (2-4). The peel strength between the polyurethane foam layer (2-3) and the seat frame (2-4) is greater than 4.0 N / mm, and the peel force between the polyurethane foam layer (2-3) and the PVC surface layer (2-1) is greater than 15 N / 5 cm.

2. The forklift vacuum forming seat according to claim 1, characterized in that, The thickness of the polyurethane foam layer (2-3) is 30-70 mm.

3. A forklift vacuum forming seat according to claim 1, characterized in that, The thickness of the seat frame (2-4) is 2-5mm, and the material of the seat frame (2-4) is selected from at least one of PVC and ABS.

4. A forklift vacuum forming seat according to claim 1, characterized in that, The thickness of the hot melt adhesive mesh (2-2) is 0.6-0.9 mm.

5. A forklift vacuum forming seat according to claim 1, characterized in that, The thickness of the PVC outer skin layer (2-1) is 0.8-1.5 mm.

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