CN201399564Y - Ceramic core with air exhaust hole - Google Patents

Abstract

The utility model relates to a ceramic core with air exhaust hole, in particular to a ceramic core with exhausting function for casting molding, which can effectively reduce rejection rate caused by that the unsmooth exhausting make the casting generate air holes during casting molding course. The ceramic core with air exhaust hole is characterized in that the ceramic core is provided with a plurality of exhausting holes. The ceramic core with air exhaust hole has simple, compact and reasonable structure; and can effectively overcome the shortcomings of poor exhausting performance for the traditional ceramic core, and makes the casting smoothly exhaust during the molding course, and increases the casting yield, and reduces the production cost.

Description

Band steam vent ceramic core

Technical field

The utility model relates to a kind of band steam vent ceramic core, and it is the ceramic core with degassing function that is used for the foundry goods moulding specifically, can effectively reduce in the foundry goods forming process not produce the scrappage that pore causes because of exhaust does not freely make foundry goods.Belong to the frame for movement technical field.

Background technology

In existing fusible pattern (dewax) Casting Technology, ceramic core is often adopted at the position of narrow inconvenience system shell in some space.Because the venting quality of ceramic material is very poor, when foundry goods needs the position of exhaust to be positioned at below the ceramic core in forming process, because of freely not making foundry goods produce pore, exhaust do not scrap (adopt the place of ceramic core often the space is narrow can not repair) herein, especially to exigent pressure-bearing foundry goods, its scrappage is very high, and production cost is risen.

Summary of the invention

The purpose of this utility model is to overcome above-mentioned weak point, thereby provide a kind of weakness that can effectively overcome traditional ceramics core venting quality difference, make foundry goods exhaust smoothly in forming process, can improve casting yield, the band steam vent ceramic core that reduces production costs.

According to the technical scheme that the utility model provides, band steam vent ceramic core comprises ceramic core, foundry goods, and ceramic core is arranged in the foundry goods, and feature is: offer a plurality of exhaust holes on the described ceramic core.Foundry goods is in forming process, and gas can be discharged smoothly by steam vent in the die cavity, effectively reduces the bleb defective.

Compared with the prior art the utility model has the following advantages:

The utility model is simple, compact and reasonable for structure; Can effectively overcome the weakness of traditional ceramics core venting quality difference, make foundry goods exhaust smoothly in forming process, improve casting yield, reduce production costs.

Description of drawings

Fig. 1 is the utility model structure user mode figure.

The specific embodiment

Embodiment during following the utility model is incited somebody to action in conjunction with the accompanying drawings is further described:

As shown in Figure 1: comprise ceramic core 1 and foundry goods 2.Ceramic core 1 is arranged in the foundry goods 2, because foundry goods 2 is narrow in the space, position that ceramic core 1 is set, and inconvenience system shell (shell) (shell is thin, and intensity is low, is easy to generate shell during cast herein and breaks), this is the reason that adopts ceramic core herein usually.In the casting pouring forming process, high-temperature molten steel steadily rises from the shell bottom, type cavity gas pressure raises, part gas is by the ventilative discharge of shell, the molten steel that another part is risen is driven upward, when gas entered the high point of local high spot and this and covered by ceramic core, these gas pressures risings but can't be discharged, and produce bleb during solidification of molten steel under this local high spot.Offer several exhaust holes 1-1 on the utility model ceramic core 1 and be exactly in order to allow the gas under the local high spot discharge smoothly along the direction of arrow among the figure, to eliminate the bleb defective by aperture 1-1.Facts have proved that the utility model is simple in structure, effect is remarkable, and casting quality is stable

Claims (1)

1, a kind of band steam vent ceramic core comprises ceramic core (1), foundry goods (2), and ceramic core (1) is arranged in the foundry goods (2), it is characterized in that: offer a plurality of exhaust holes (1-1) on the described ceramic core (1).

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