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Longkou Jinlong Construction Machinery Parts Co.,

Tel: +86 18854506390

E-mail:109848310@qq.com

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Add:Ma Jia Cun He Xi, Lutou Town, Longkou City, Shandong Province


What are the advantages of the lost foam casting process to produce shovel bucket teeth?

2020-10-16 11:50:09
Times

Excavator bucket tooth is the main vulnerable part of open-pit shovel. The casting weight is 130kg, the material is zgmnl3, and the outline size is 944mm × 300mm × 150 mm, usually produced by traditional sand casting process. Due to many sand cores, complex process, labor-consuming and time-consuming, and high requirements for the technical operation level of workers, it is difficult to clean the flash burr of bucket teeth of excavators produced, and the scrap rate is high. EPC has many advantages in technology and economy

(1) Without the core, the core making process and related equipment can be saved.

(2) There is no parting surface and no core clearance, so there is no flash and burr on the casting.

(3) It can reduce or even cancel the stripping angle without considering the negative number of parting and sand core, and improve the dimensional accuracy of castings.

(4) The foam mold is easy to be bonded and assembled.

(5) Good working environment and low production cost.

In order to give full play to the advantages of lost foam casting and improve the rate of finished products, group casting method can be used to cast excavator bucket teeth. The bottom suction negative pressure sand box is used, 10 pieces are placed in one box, the tip of bucket teeth of excavator is downward, and they are placed in the sand box in parallel with each other, and 5 pieces are placed on both sides of the runner respectively. The closed gating system is adopted, and there is no need to set risers.

During pouring, the sprue should be connected first, and then the pouring should be carried out smoothly and quickly, so that the molten steel will always fill the gate cup until the end of pouring. In this way, the EPS in the sprue vaporizes rapidly and is filled with molten steel in a short time, which can effectively prevent the negative pressure suction gas from entering the mold cavity. At the same time, a certain static pressure can be established in the gating system, so that the molten steel is not easy to be involved in the gas and residue in the filling process, and the defects such as pores and residues can be effectively avoided, At the same time, it can also prevent the waste products caused by local collapse of casting.

Bucket teeth of excavator



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Tel:+86 18854506390

E-mail:109848310@qq.com

Add:Ma Jia Cun He Xi, Lutou Town, Longkou City, Shandong Province

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