Heat insulation plate for commercial vehicle engine

Abstract

The utility model belongs to the technical field of commercial vehicle engines, and relates to a heat insulation plate for a commercial vehicle engine, the heat insulation plate is in a multilayer laminated shape from the side of the engine to the outside, the heat insulation plate sequentially comprises a first layer, a second layer, a third layer and a fourth layer from the side of the engine to the outside, and the first layer and the fourth layer are made of non-woven fabrics or aluminum foils. The second layer is made of LDPU or light foam, and the third layer is made of semi-cured felt or felt; the heat insulation plate is mounted between an engine and a cab after being subjected to pressure maintaining forming, or the heat insulation plate is mounted between the engine and electrical equipment after being subjected to pressure maintaining forming; the production energy consumption of the commercial vehicle engine heat insulation plate is reduced, the machining efficiency is improved, pollution is reduced, the product is more environment-friendly, the manufacturing cost is reduced, the product is more competitive, the weight of a single product is reduced by more than 60%, and the whole vehicle light weight is facilitated; therefore, the device is low in processing energy consumption, high in processing efficiency, light in weight and more environment-friendly.

Description

Technical Field

[0001] The utility model belongs to the technical field of commercial vehicle engines and relates to a heat insulation plate for a commercial vehicle engine. Background Art

[0002] The heat insulation plate of a commercial vehicle engine is a protective device installed around the engine. Its main purpose is to reduce the transfer of engine heat to the cab or other sensitive components, thereby improving the safety and comfort of the vehicle. The heat insulation plate is usually made of materials with good heat insulation performance to ensure that it can effectively isolate high temperatures. The main functions of the heat insulation plate are as follows: 1. Reduce heat transfer: Prevent the high temperature of the engine from being transferred to the cab or other sensitive areas to protect the personnel and electrical equipment inside the vehicle. 2. Improve fuel efficiency: Reduce engine heat dissipation, which helps to improve fuel efficiency. 3. Extend the service life of components: Protect wires, plastic parts, etc. around the engine from high-temperature damage and extend their service life. 4. Fire safety: Reduce the fire risk and improve the safety of the vehicle. The existing heat insulation plates for commercial vehicle engines are usually made of non-woven fabric / aluminum foil + glass fiber + non-woven fabric / aluminum foil or non-woven fabric / aluminum foil + glass fiber + semi-cured felt + non-woven fabric / aluminum foil.

[0003] However, the existing heat insulation plates for commercial vehicle engines have the following disadvantages: 1. The raw material glass fiber used has a long setting time during the molding process and low efficiency (usually 6 - 8 minutes per piece), and the energy consumption for hot pressing and molding is high (the mold is heated to 180 ± 10 °C). 2. The raw material glass fiber used is easy to "float" in the air during the processing, causing environmental pollution and harming the health of operators. 3. After the product is molded, the excess corner waste (glass fiber) is solid waste, which is difficult to decompose, bringing environmental pollution and increasing production costs. 4. After the product is molded, it has high hardness, is not easy to assemble, and is not easy to repair after the corners are broken.

[0004] Therefore, a heat insulation plate for an engine with low processing energy consumption, high processing efficiency, light weight and more environmental protection is needed to solve the above technical problems. Summary of the Utility Model

[0005] The technical solution adopted by the utility model to solve the technical problems is: A heat insulation plate for a commercial vehicle engine, the heat insulation plate is in a multi-layer stacked shape from the engine side outwards. The heat insulation plate sequentially includes from the engine side outwards: a first layer, a second layer, a third layer, and a fourth layer. The first layer and the fourth layer are made of non-woven fabric or aluminum foil;

[0006] The second layer is made of LDPU or lightweight foam; both LDPU (lightweight polyurethane foam) and lightweight foam are synthetic materials, sharing common characteristics such as light weight, elasticity, and durability, but they have differences in specific properties and application scenarios. LDPU foam has characteristics such as light weight, excellent elasticity, softness, good heat insulation performance, sound absorption, durability, and compression resistance. It is suitable for occasions that require heat preservation or insulation, can reduce noise interference, and provide excellent softness and comfort. This material can maintain its shape even under heavy pressure, is not easily deformed, and has a long service life. In contrast, lightweight foam focuses more on its light weight characteristic and wide application range. Lightweight foam is easy to handle and install, has excellent elasticity, and can maintain its shape and function even after long-term use. It also has good softness, heat insulation performance, and can absorb sound to reduce noise interference. This material is not easily damaged, has strong durability, a long service life, and also has good compression resistance. LDPU and lightweight foam have their own characteristics and application fields. Due to its excellent heat insulation performance and softness, LDPU is more suitable for occasions that require heat preservation or insulation; while lightweight foam, due to its light weight characteristic and wide application range, is more suitable for the packaging and protection of various products. Therefore, choose to use LDPU or lightweight foam according to different needs.

[0007] The third layer is made of semi-cured felt or felt; felt is elastic and suitable as a material for shockproof, sealing, cushioning, and the base felt of elastic wire card clothing. It has good adhesion, is not easily loose, and can be die-cut into various shaped parts; while semi-cured felt has good sound insulation and vibration isolation performance and is suitable as a sound absorption and vibration isolation material. It has high plasticity and can be customized and processed according to needs. It has certain durability and stability and is suitable for long-term use in various environments. Felt and semi-cured felt each have their unique uses and advantages. Felt, due to its soft and wear-resistant characteristics, is more suitable for the production of handicrafts and daily necessities, while semi-cured felt, due to its excellent sound insulation and heat insulation performance and stability, is more suitable for industrial applications and automotive parts and other fields. Therefore, choose to use semi-cured felt or felt according to different needs.

[0008] After the heat insulation board is formed under pressure, it is installed between the engine and the cab, or after the heat insulation board is formed under pressure, it is installed between the engine and the electrical equipment.

[0009] Preferably, the thickness range of the heat insulation board is 5 - 30 mm. Different thicknesses of the heat insulation board can be selected according to different needs to achieve different heat insulation effects, or multiple layers of heat insulation boards can be used in overlapping.

[0010] Preferably, the thickness range of the second layer and the third layer is 3 - 28 mm; the thicknesses of the second layer and the third layer are relatively small, so that the overall thickness of the heat insulation board is relatively small. Without affecting the heat insulation effect, it can also reduce the material usage rate, save materials, and contribute to the lightweight of the whole vehicle.

[0011] Preferably, the upper and lower surfaces of the second layer are adhesively connected to the first layer and the third layer respectively through a film or powder adhesive; adhesive installation is simple and convenient, and it can also be fixed by other installation methods, such as mechanical fixation with screws.

[0012] Preferably, both the inner and outer sides of the heat insulation board are smooth surfaces.

[0013] The beneficial effects of the present utility model are as follows:

[0014] The present utility model reduces energy consumption, improves the processing efficiency of the heat insulation board for commercial vehicle engines, reduces pollution, makes the product more environmentally friendly, reduces manufacturing costs, makes the product more competitive, and reduces the weight of a single product by more than 60%, which is beneficial to the lightweight of the whole vehicle; therefore, the present utility model has low processing energy consumption, high processing efficiency, light weight and is more environmentally friendly. Description of the Drawings

[0015] Figure 1 is a schematic diagram of a heat insulation board for a commercial vehicle engine according to the present utility model;

[0016] Figure 2 is a schematic diagram of the bonding of the second layer of the present utility model. Detailed Embodiments

[0017] Next, the related technologies in the present utility model will be clearly and completely described in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] Refer to Figures 1 - 2 , in this embodiment, a heat insulation board for a commercial vehicle engine replaces high-energy-consuming glass fiber with an environmentally friendly new material LDPU, reducing environmental pollution. The processing efficiency of the material combination method in this embodiment is doubled compared with that of traditional products (the original technology is 6 - 8 minutes per piece, and the new technology is 2 - 3 minutes per piece).

[0019] In this embodiment, LDPU is used to replace the glass fiber in traditional products. The surface density of LDPU is 200 - 240 g / ㎡, while the surface density of the glass fiber in traditional products is 800 - 2000 g / ㎡, reducing the weight of the overall product by more than 60%, which is beneficial to the lightweight of the whole vehicle.

[0020] This embodiment is "softer" than traditional products, which is beneficial to assembly.

[0021] In this embodiment, the mold is heated to 120 ± 5 °C during the processing. In the traditional product, the mold needs to be heated to 180 ± 10 °C during the processing, which greatly reduces the energy consumption. The production cost of this embodiment is lower than that of the traditional product.

[0022] The processing procedure of the heat insulation board for commercial vehicle engines in this embodiment is as follows:

[0023] Attaching adhesive film or powder: Attach adhesive film or powder to the upper and lower surfaces of the LDPU, as Figure 2 shown;

[0024] Laying materials: Lay the surface layer (non-woven fabric / aluminum foil) flat on the flat plate, lay the LDPU with adhesive film or powder attached to the upper and lower surfaces on the surface layer (non-woven fabric / aluminum foil), lay the semi-cured felt (cotton felt) on the LDPU, and lay the surface layer (non-woven fabric, aluminum foil) on the semi-cured felt (cotton felt), as Figure 1 shown;

[0025] Pressure holding and forming: Heat the mold temperature to 120 ± 5 °C, place the laid raw materials flat in the mold, with a pressure of 8 ± 1 MPa and a pressure holding time of 150 ± 20 S.

[0026] Trimming and punching: Put the semi-finished product into the trimming tooling and trim and punch according to the product drawing (mold indentation).

[0027] Inspect and package for storage after passing the inspection.

[0028] In summary, the present utility model reduces the production energy consumption of the heat insulation board for commercial vehicle engines, improves its processing efficiency, reduces pollution, makes the product more environmentally friendly, reduces the manufacturing cost, makes the product more competitive, and reduces the weight of a single product by more than 60%, which is beneficial to the lightweight of the whole vehicle; therefore, the present utility model has low processing energy consumption, high processing efficiency, light weight and is more environmentally friendly.

[0029] It should be emphasized that: The above are only the preferred embodiments of the present utility model, and do not impose any form of limitation on the present utility model. Any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model still fall within the scope of the technical solution of the present utility model.

Claims

1. A heat insulation plate for a commercial vehicle engine, characterized in that, The heat insulation board is in a multi-layer stacked shape from the engine side outwards, and the heat insulation board sequentially includes, from the engine side outwards: a first layer, a second layer, a third layer, and a fourth layer. The first layer and the fourth layer are made of aluminum foil, the second layer is made of lightweight foam, and the third layer is made of semi-cured felt or felt; After the heat insulation board is pressure-formed, it is installed between the engine and the cab, or after the heat insulation board is pressure-formed, it is installed between the engine and the electrical equipment; The thickness range of the heat insulation board is 5-30 mm; The thickness range of the second layer and the third layer is 3-28 mm.

2. The heat insulation plate for a commercial vehicle engine according to claim 1, characterized in that, The upper and lower surfaces of the second layer are adhesively connected to the first layer and the third layer respectively through a film adhesive or powder adhesive.

3. The heat insulation plate for a commercial vehicle engine according to claim 1, characterized in that, Both the inner and outer sides of the heat insulation board are smooth surfaces.

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