1. Structural design of composite manhole cover: In addition to the requirements of machinery and equipment and mechanical processing technology, the design of composite manhole cover structure should also meet the requirements of the casting process, which should facilitate the manufacture of models, core boxes and shapes;
2. The shape of the composite manhole cover should be simple to facilitate mold lifting, and the casting parting surface should be made as flat as possible with the minimum number;
3. The inner cavity of the composite manhole cover should not require or use a core when casting. When a core is used, it should be convenient to support, fix and exhaust sand, and sufficient process holes should be provided when necessary;
4. For the structure of the inner and outer sides of the composite manhole cover and reinforcing ribs, a certain structural slope should be set in the direction of the ejection;
5. The boss portion on the composite manhole cover and the body of the composite manhole cover should not differ too much. It is better to take several bosses at the same height and close to the
same surface, and it is best to connect them as a whole.
same surface, and it is best to connect them as a whole.
1. Technical parameter test load: 400KN heavy, 250KN general, 125KN light;
2. Elastic modulus: average 1000MPa;
3. Compressive strength: average 25MPa;
4, acid resistance: the sample is 20%;
5. Bending strength: average 22MPa impact strength: average 10J / m2;
6. Tensile strength: average 10MPa;
7. Water absorption rate: 1%;
8. There is no corrosion on the surface after soaking in sulfuric acid solution for 48 hours, and the quality loss is 1%. Resin manhole cover
First, long service life After hundreds of fatigue impact tests without any cracks.
Second, low noise When the car is rolling, there is no harsh noise and rebound phenomenon.
Third, tough and strong resistance to acid and alkali corrosion, no rust, anti-aging.
4. Innovative and environmental protection The new materials are supplemented with innovative technologies, which are non-toxic and harmless, and environmentally friendly.
Fifth, changeable design is strong, personalized design according to user needs.
Six, good tightness Can be sealed to effectively prevent harmful gases and dirt from leaking out of the septic tank.
Seven, do not lose the value of non-recycling and reuse, thoroughly solve the cast iron manhole cover is easy to lose, stolen municipal dysentery.
Eight, high load capacity, high strength, high precision, strong toughness, not easy to break, and exceed the bearing capacity of nodular cast iron manhole cover.
Nine, good safety and toughness, compression resistance, bending resistance, deformation resistance, the steel skeleton will not be smashed as a whole to ensure safe use.
X. The artistic decoration effect is good and the color is rich. It can be classified and colored according to needs, and the shape and pattern can be designed according to user needs to integrate art into the product.