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High polymer composite material manhole lid and its production method

A composite material and polymer technology, applied in the field of polymer composite material manhole cover and its manufacturing, can solve the problems of high market price of hard rubber and heavy calcium powder, the bearing capacity cannot meet the requirements, and the production cost of the manhole cover is affected. The effect of high strength, improved bearing capacity, and high thermal stability

Inactive Publication Date: 2006-11-22
桂宾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the invention has the characteristics of secondary utilization of waste and has a good shock absorption effect, the bearing capacity of the material cannot meet the requirements, and the strength is poor, and it is prone to breakage
Another example is the "polymer composite molded inspection manhole cover and its manufacturing method" disclosed in Chinese patent ZL200410040426.6, which is mainly composed of 25% to 35% polymer unsaturated resin, 20% to 30% chopped glass fiber, 10 % to 20% hard rubber, this method uses hard rubber as a filler, and heavy calcium powder is added at the same time in its embodiment. Although the strength and bearing capacity of the polymer composite molded inspection manhole cover have been effectively improved, hard rubber and The market price of heavy calcium powder is high, which directly affects the production cost of the manhole cover

Method used

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  • High polymer composite material manhole lid and its production method
  • High polymer composite material manhole lid and its production method
  • High polymer composite material manhole lid and its production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] 1. Preparation of materials:

[0039] At room temperature, pour 45% to 70% of coal ash and 5% to 15% of polymer unsaturated resin into the mixer, stir for 3 to 6 minutes, add 15% to 30% of fiber, and stir together for 1 to 4 minutes. minute. Then add the mixture of curing agent, defoamer, reinforcing agent, zinc stearate and pigment, and stir for 2 to 5 minutes to fully mix the raw materials.

[0040] 2. Filling:

[0041] First smear or evenly spray the release agent on the mold, pour 30% to 60% of the raw material mixture into the mold cavity, put the T-shaped steel skeleton, and then pour the remaining raw material mixture.

[0042] 3. Compression molding:

[0043] After all the raw material mixture is added to the mold cavity, close the mold, control the pressure within the range of 200-300 tons, control the temperature within the range of 100-150°C, keep it for 8-15 minutes, then open the mold and eject it.

Embodiment 2

[0045] 1. Material preparation: At room temperature, pour 60% coal ash and 15% polymer unsaturated resin into the mixer, stir for 4 minutes, add 15% fiber, and stir together for 3 minutes. Then add the mixture of curing agent, defoamer, reinforcing agent, zinc stearate and pigment, and stir for 4 minutes to fully mix the raw materials.

[0046] 2. Filling:

[0047] Smear or evenly spray the release agent on the mould, pour 45% of the raw material mixture into the mold cavity, put the T-shaped steel skeleton, and then pour the remaining raw material mixture.

[0048] 3. Compression molding:

[0049] After all the raw material mixture is added to the mold cavity, close the mold, control the pressure at 200 tons, and control the temperature at 120°C. After keeping for 10 minutes, open the mold and eject it.

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Abstract

The invention discloses a macromolecule composite well cover and relative production. Wherein, mixing the coal ash at 45-70%, fiber at 15-30%, macromolecule unsaturated resin at 5-15%, and some solidifier, defoam agent, strengthen agent, zinc stearate, and paint; clamping the T-shaped steel bar skeleton between the mixture; via the hydraulic machine, heating and pressurizing the mould; then removing the mould. The inventive well cover has high abrasion resistance, environment protection, non-pollution, high carrying ability, and beautiful appearance.

Description

technical field [0001] The invention relates to the technical field of road facility manufacturing, in particular to a polymer composite manhole cover and a manufacturing method thereof. Background technique [0002] Early manhole covers were mostly made of pig iron and were often stolen, which not only caused a waste of manpower and material resources, but also caused road defects to be a major problem for major cities. After the appearance of the new type of polymer composite manhole cover, because its products have no recycling value, the problem of anti-theft has been completely solved. Most of the current polymer composite manhole covers mainly use resin and fiber as the main raw materials, and are molded by high temperature and high pressure at one time. This product has the characteristics of high density, high hardness, high pressure, light weight, corrosion resistance, and aging resistance. The ideal replacement for cast iron manhole covers. [0003] However, when...

Claims

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Application Information

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IPC IPC(8): B28B1/52B28B3/00B28C5/08
Inventor 桂宾
Owner 桂宾
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