JPS6380954A - Casting method of rotor for kneading machine - Google Patents

Abstract

PURPOSE:To improve the cooling effect and to reduce the production cost by setting pipe for cooling water passage in a mold and then casting it. CONSTITUTION:The pipe for cooling water 3 is set in the mold and next, the pipe is cast as insert in a body. Then, the pipe 3 is made of a material melted down at almost the same temp. as molten metal. In this way, the surface of pipe 3 is melted by the molten metal, but the inner side thereof is held as its shape is by chiller effect and the ideal cooling passage is formed in the inner part of casting. As the process is simplified as compared with a production method of the rotor and the shaft separately, the production cost is reduced, and further the cooling effect is improved by the chiller action of pipe 3.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method of casting a rotor that requires cooling or heating of a crosstalk machine.

[Conventional technology]

Conventional rotors are manufactured by shrink-fitting a rotor 01 provided with a cooling water channel 03 and a shaft 02 provided with a cooling pipe hole 06 (a groove is provided on the rotor side) as shown in FIG. 2, or As shown in Figure 3, there is a cast hole 012 for cooling water in the rotor 0 (11).
It was manufactured in one body with a

However, it is expensive, and requires overhaul, time axis 02
was reused, but rotor section 01 was discarded.

The one-piece type shown in Figure 3 is low cost and can be reused, but its cooling effect is poor, and it is difficult to use in terms of quality, such as when kneading rubber.
When kneading was required at a relatively low temperature, sufficient kneading performance and quality were not compatible.

The present invention aims to solve the above problems.

[Failure to solve the problem]

The present invention is characterized in that the cooling water passage pipe is installed in the mold, and then the casting is performed.

[For production]

In the present invention, when the rotor and shaft are manufactured as a single unit, as a method of not reducing the cooling effect during use, coolant (water etc.) passages are arbitrarily arranged in the rotor casting.
A pipe made of a material that melts at approximately the same temperature as the molten metal is wrapped around it, and this is cast in an integral casting. At this time, the pipe is
The outer surface melts while the inner surface cools and retains its original shape, creating an ideal cooling passage inside the casting.

〔Example〕

Next, an embodiment of the method of the present invention will be explained based on the drawings.

In FIG. 1, the casting method is to install a cooling channel pipe 3 in a drum shape and cast it as it is.

By melting only the outer periphery of the pipe, the arrangement and volume of the cooling water passages can be secured as desired.

The conventional two-part type is expensive, but in this embodiment, there is no need to take into account leakage of cooling water from the shrink-fit portion, slippage between the rotor and the shaft, etc.

〔Effect of the invention〕

U) Compared to the rotor and shaft split type (currently manufactured method), it reduces costs as well as the cost during overhaul.

(2) A cooling effect similar to that of the split type can be expected.

[Brief explanation of the drawing]

Fig. 1 is a vertical sectional elevation view showing one embodiment of the method of the present invention;
3 and 3 are longitudinal sectional elevational views showing a conventional casting method, respectively.

Claims (1)

[Claims] A method for casting a rotor for a kneading machine, which comprises installing a pipe for a cooling water passage in a mold and then casting.