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Fin Paper Straight Sprue Runner Series

The Fin paper sprue straight casting tube is made of pulp and high-temperature resistant fiber composite material. It is non-burning, lightweight, and degradable.
It realizes the reuse of resources and reduces environmental pollution. It is supported by the national environmental protection policy. The paper sprue pipe has various specifications such as straight sprue pipe, elbow pipe, equal-diameter tee, variable-diameter tee, and variable-diameter straight-through.


Product Features:

1. The paper straight tube has good toughness, easy to cut, easy to install, easy to connect with foam plastic runner.

2. Good high-temperature strength, high refractoriness, and strong anti-scour ability. The paper sprue tube adopts a socket connection, and the filter mesh is used together to filter the slap and impurities after pouring the molten metal into the runner, effectively preventing and Eliminate the occurrence of slag inclusion defects.

3. Does not have any effect on the molten metal, maintains the original performance of the molten metal, and has no carburization problem for the casting. Use paper sprue tube, sprue cup and sprue super-heat zone, sprue and sprue joint, no foam or paint layer, will not cause sand washing, sand inclusion, and sand into the casting White spot (dot) defects. The paper sprue tube has high refractoriness, reducing and avoiding the formation of carbon deposits and wrinkle defects.

4. Compared with the foam-coated sprue, the paper uses a hollow hollow sprue tube, and the initial casting does not burn the foam material, which reduces the incidence of the reverse reaction caused by the pyrolysis and gasification reaction of the foam material during pouring. Effectively reduce the heat loss of the runner metal liquid, and prevent the occurrence of problems such as sudden and small, broken flow during the casting process due to back spray.

5. After pouring with a paper sprue runner, there is little hard solid waste, which is easy to peel off after high temperatures.

Parameters of Paper Straight:

paper straight

Product name Item Size Diameter L L1 D d
JDZ-25 Φ25*300 Φ25 300 30 30.2 27.3
JDZ-30 Φ30*300 Φ30 300 30 35.2 32.4
JDZ-35 Φ35*300 Φ35 300 30 40.8 38
JDZ-40-32 Φ40-32*300 Φ40 300 30 46.6 35.4
JDZ-40 Φ40*300 Φ40 300 30 46.6 43.4
JDZ-50 Φ50*300 Φ50 300 30 57.7 54
JDZ-60 Φ60*300 Φ60 300 30 67.7 64
JDZ-70 Φ70*300 Φ70 300 30 79.5 75
JDZ-60 Φ80*300 Φ80 300 30 90.6 85.5
JDZ-60 Φ90*300 Φ90 300 30 103.2 97
JDZ-60 Φ100*300 Φ100 300 30 113.3 107

Application of Paper Straight:

Through the application of the lost foam and solid casting, the paper sprue casting tube does not produce an endothermic reaction or gasification and cooling of the foaming sprue runner at the beginning of the molten metal casting like the ceramic tube.

Because of its good thermal insulation performance, the paper sprue casting tube reduces the heat transfer of the molten metal to the casting pipe wall, so that keeping the molten metal without cooling is equivalent to increasing the temperature at which the molten metal enters the mold, and the temperature of the molten metal is relatively stable, prompting the molten metal. The filling is fast and smooth. The molten metal has sufficient time to replenish, which is beneficial to equalization and solidification.

paper sprue runner


First of all, our factory adheres to the principle of quality first. We have a group of professional technical and inspection personnel to focus on product quality control and Technological innovation. For each product, we have strict process inspection and factory inspection. We have a well export experience, to provide customers with professional pre-sales and after-sales service and technical support. The sales process will be active tracking queries, positively solving the problems in the follow-up use of customers.