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Compartment body plate for refrigerated truck and preparation method of compartment body plate

A technology for refrigerated trucks and plates, applied in refrigerated cargo transportation, chemical instruments and methods, vehicle parts, etc., can solve the problems of high material cost, complicated refrigerated truck assembly process, and large loss, and achieve excellent mechanical properties and thermal insulation properties. The production process is continuous and stable, and the effect of improving the flexural modulus

Active Publication Date: 2015-07-08
YANGZHOU MAXI CUBE TONG COMPOSITES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the loss of polyurethane after cutting is relatively large, so the material cost is relatively high
Especially in the current situation where the price of chemical raw materials is rising seriously, the production cost of the carriage is getting higher and higher
Moreover, the existing car compartments with glass fiber reinforced plastics, color steel plates, and stainless steel panels as panels are difficult to recycle after being scrapped, are not environmentally friendly, and are not easy to repair after the surface is broken, which affects the later use of refrigerated vehicles.
The refrigerated trucks assembled in this form are heavy, and the assembly process is complicated. The connection between the plates must be in the form of rivets, and the airtightness is not particularly ideal, which eventually leads to the complicated assembly process of the refrigerated trucks and the high cost of transportation for later use. Disadvantages of higher input costs

Method used

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  • Compartment body plate for refrigerated truck and preparation method of compartment body plate

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Experimental program
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preparation example Construction

[0020] The preparation method of the above-mentioned compartment plate for refrigerated vehicles comprises the following steps:

[0021] 1) Premixing of raw materials: Add the raw materials into the mixing mixer and stir for 30-40 minutes, then masticate for 5-6 minutes;

[0022] 2) Extrusion and foam molding: Send the pre-mixed raw materials in step 1) to a twin-screw extruder for extrusion, and then shape them in a mold to obtain a polypropylene foam sheet. The temperature of the mold is 60-75°C;

[0023] 3) Composite glass fiber reinforced polypropylene panel: the glass fiber and polypropylene blended fabric is preheated by a heating roller, and then sent to the cold and hot pressing plate of the hot press together with the polypropylene foam sheet obtained in step 2) for shaping and compounding. Finally, it is drawn to a cutting machine for cutting to obtain the car body plate for refrigerated vehicles, wherein the temperature of the heating roller is 150-170°C, and in the...

Embodiment 1

[0026] 100 parts of modified polypropylene, 10 parts of modified polyethylene, 0.2 parts of calcium carbonate, 10 parts of carbon dioxide, and 0.2 parts of mineral oil were masticated at 170°C for 6 minutes, then put into the extruder, Medium foaming and setting, the foaming temperature is 170°C, and the heating time is 15 minutes to obtain a foamed plastic sheet, and then enter the double steel belt press to composite the glass fiber reinforced PP panel to obtain the polypropylene foam composite sheet product 1, the compressive strength is 1.95MPa, surface hardness 75HD, panel peel strength 201.6[(N·mm) / mm], bending strength 10MPa. The thermal conductivity is 0.035 W / (m·k) -1 .

Embodiment 2

[0028] 100 parts of modified polypropylene, 5 parts of modified polyethylene, 0.2 parts of calcium carbonate, 10 parts of carbon dioxide, and 0.2 parts of mineral oil were masticated at 170°C for 6 minutes, then put into the extruder, Medium foaming and setting, the foaming temperature is 170°C, and the heating time is 15 minutes to obtain a foamed plastic sheet, and then enter the double steel belt press to composite the glass fiber reinforced PP panel to obtain the polypropylene foam composite sheet product 2, the compressive strength is 1.75MPa, surface hardness 73HD, panel peel strength 203.4[(N·mm) / mm], bending strength 9.3MPa. The thermal conductivity is 0.036 W / (m·k) -1 .

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Abstract

The invention discloses a compartment body plate for a refrigerated truck. The compartment body plate is formed by compounding glass fibre reinforced polypropylene panels on the upper surface and the lower surface of a polypropylene foam plate, wherein the polypropylene foam plate is formed by following foaming raw materials in ratio by mass: 100 parts of modified polypropylene, 5-10 parts of modified polyethylene, 0.2-1.5 parts of a nucleating agent, 5-10 parts of a foaming agent, and 0.2-1.5 parts of a foam stabilizing agent. The invention further discloses a preparation method of the plate. The plate adopting the technical scheme is light and environment-friendly, not easy to deform, high in mechanical property, simple and convenient in splicing mode, excellent in heat-insulating performance, low in cost, and capable of meeting the needs on the compartment body plates for the conventional refrigerated trucks.

Description

technical field [0001] The invention belongs to the technical field of refrigerated truck manufacturing and the field of polymer foam composite materials, and in particular relates to a compartment plate for a refrigerated truck and a preparation method thereof. Background technique [0002] Refrigerated trucks are key equipment in an important link in low-temperature cold chain logistics. Reliable work and stable performance of refrigerated trucks during refrigerated transportation are the key to ensuring the safety of perishable and fresh food during transportation. A road transport refrigerated vehicle usually consists of three parts: a chassis, an insulated compartment, and a refrigeration unit. Among them, the thermal insulation compartment is spliced ​​by sandwich composite material panels, and its panels are generally composed of polyurethane thermal insulation core material and glass fiber reinforced plastic, color steel plate, stainless steel panel, etc. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60P3/20B62D33/04B32B27/30C08L23/12C08L23/06C08J9/12C08J9/10
Inventor 沈泉锦沈宗华董辉杨国刚潘惠良丁寅森王楠马忠贤
Owner YANGZHOU MAXI CUBE TONG COMPOSITES CO LTD