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A shell and modifier technology, applied in the field of rubber and plastic products, can solve the problems of heavy specific gravity and laborious handling, and achieve the effects of small specific gravity, increased strength, and reduced weight
Inactive Publication Date: 2017-12-15
浙江鼎海科技股份有限公司
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Problems solved by technology
[0003] The above-mentioned triangular chocks and wheel chocks have the following problems: they are made of raw materials that are hot-extruded and cold-pressed, and the interiors of the triangular chocks and wheel chocks are solid, with a large specific gravity, and it is very laborious to carry them.
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Embodiment 1
[0032] Embodiment 1: a kind of stopper, as figure 1 , figure 2 As shown, it includes a shell 1 and a hard polyurethane foam 2 inside the shell 1 . The front end of the casing 1 is provided with an inclined blocking surface 3. When the vehicle is on a slope, the stopper is placed below the vehicle wheel. The blocking surface 3 on the casing 1 touches the wheel, which plays a blocking role on the wheel and prevents the vehicle from sliding along the slope.
[0033] Such as figure 2 As shown, the shell 1 is made by mixing polyvinyl chloride and nitrile rubber and blow molding, and a cavity is formed inside the shell 1 . Polyurethane rigid foam 2 raw materials include polyols, isocyanates, blowing agents and modifiers. The foaming agent is liquid carbon dioxide, and the modifying agent is silicon-based mesoporous material. After the polyurethane rigid foam 2 raw material is injected into the cavity and foamed, the polyurethane rigid foam 2 located in the shell 1 is formed. ...
Embodiment 2
[0038] Embodiment 2: a kind of stopper, the difference with embodiment 1 is, as Figure 4 As shown, the front and rear ends of the housing 1 are provided with blocking surfaces 3 , and the gripping portion 5 is provided on the side wall of the housing 1 .
[0039] The preparation method of the modifier is as follows, step 1, weigh 2,5,8,11 tetrapinacol borate perylene monomer, 1,3,6,8-tetrabromoperylene, triphenylphosphine, cesium carbonate , cesium fluoride, bis(dibenzylidene acetone) cake (0), nano oxide, add anhydrous and oxygen-free N, N-dimethylformamide, anhydrous and oxygen-free toluene after mixing; Step 2, step The mixture of 1 was heated and refluxed for 48 hours under nitrogen system; step 3, the mixture in step 2 was cooled and then filtered to obtain a solid intermediate product, which was washed with acetone several times; step 4, using tetrahydrofuran as a solvent, using Soxhlet extraction Repeatedly extract the intermediate product in step 3 several times; ste...
Embodiment 3
[0041] Embodiment 3: A stopper. The difference from Embodiment 2 is that in the preparation process of the modifier, the nano-oxide is nano-silicon dioxide, and the parts by weight of each component are shown in Table 1.
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Abstract
The invention discloses a stopping device. The stopping device comprises a shell and rigid polyurethane foam, a cavity is formed in the shell, and the shell is filled with the rigid polyurethane foam. Raw materials of the rigid polyurethane foam comprise polyhydric alcohol, isocyanate, a foaming agent and a modifying agent. The stopping device has the following advantages and effects that firstly, polyvinyl chloride and acrylonitrile-butadiene rubber are adopted to prepare the shell, and the shell is filled with the rigid polyurethane foam so as to lower the proportion of the stopping device; secondly, the modifying agent is added in the rigid polyurethane foam, the modifying agent selects and uses a porous material so that the strength of the rigid polyurethane foam can be improved obviously, and the stopping device is avoided to be stressed and damaged; thirdly, the cavity is formed in the bottom of the shell so that the weight of the stopping device can be lowered, and rubber strips are arranged at the bottom of the stopping device to achieve the anti-slip effect; and fourthly, an oblique blocking face is arranged on the shell, anti-slip bulges are arranged on the blocking face, so that a good blocking effect on a vehicle wheel is achieved, and the effects that the strength is high, the proportion is low, a good blocking effect on the vehicle wheel is achieved, and transporting is convenient are achieved.
Description
technical field [0001] The invention relates to the field of rubber and plastic products, in particular to a stopper. Background technique [0002] Stoppers, also known as wheel locators, wheel chocks, reversing pads, blockers, car stoppers, etc., are placed under the wheels of the vehicle to limit the movement of the vehicle to avoid improper reversing or when the vehicle is on a slope. For example, the Chinese patent "a triangular chock, wheel chock" with application publication number CN104829926A discloses a triangular chock, wheel chock, which adopts HDPE resin, LDPE or POE resin, red mud, lubricant, coupling agent, antioxidant , carbon black, flame retardant and other raw materials are mixed evenly, and then made by hot extrusion and cold pressing. [0003] The above-mentioned triangular chocks and wheel chocks have the following problems: the raw materials are hot-extruded and cold-pressed, and the interiors of the triangular chocks and wheel chocks are all solid, th...
Claims
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Application Information
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