CN203044804U - Lining ring for pipe fitting insertion port - Google Patents

Abstract

The utility model discloses a lining ring for a pipe fitting insertion port, which is low in cost and cannot deform. The lining ring (1) is characterized by being prepared by a precoated sand material. According to the lining ring, the material is convenient to purchase; the lining ring is easy to manufacture and light in weight; at high temperature, the lining ring is not swelled; the size of the lining ring is not changed; after pouring is finished, the lining ring can easily fall off; a supporting and sizing effect is achieved; and the lining ring is convenient to operate and fall off.

Description

Pipe fitting socket liner lining ring

Technical field

The utility model relates to a kind of production of foundry goods, specifically a kind of pipe fitting socket liner lining ring.

Background technology

In castings production, produce pipe fitting as adopting the vacuum expendable pattern mould, the lost foam casting model causes the socket distortion to lose the circle influence when sand molding easily and installs, and for preventing distortion, is provided with the liner lining ring at socket.At present, its liner lining ring is general to adopt iron material to make, and the one, cost is higher, and the 2nd, the irregular phase transformation of iron material production at high temperature causes the damage of foundry goods.

Precoated sand precoatedsand.Sand grain surface namely is covered with molding sand or the core sand of one deck hard resin film before moulding.Two kinds of coating techniques of cold process and Re Fa are arranged: cold process with resin dissolves, and adds methenamine with ethanol in the mulling process, make the two be coated on sand grain surface, and the ethanol volatilization gets precoated sand; Hot method is preheating to uniform temperature to sand, adds resin and makes its fusion, stirs to make resin-coating at sand grain surface, adds the methenamine aqueous solution and lubricant, cooling, broken, sieve precoated sand.

Summary of the invention

The purpose of this utility model provides the pipe fitting socket liner lining ring that a kind of cost is low, do not have distortion.

The utility model is to adopt following technical scheme to realize its goal of the invention, a kind of pipe fitting socket liner lining ring, and described liner lining ring is made by covering the sand material.

Owing to adopt technique scheme, the utility model has been realized goal of the invention preferably, its material purchases are convenient, make simply, in light weight, at high temperature can not produce expansion, device size can not change, come off easily behind the casting complete, both played the supporting and shaping effect, again handled easily and coming off.

Description of drawings

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the upward view of Fig. 1;

Schematic diagram when Fig. 3 is the utility model use.

The specific embodiment

The utility model is described in further detail below in conjunction with drawings and Examples.

As seen from Figure 1, Figure 2, a kind of pipe fitting socket liner lining ring, described liner lining ring 1 is made by covering the sand material.To cover and get final product after sand core compound is injected the moulding of shape machine.

As shown in Figure 3, the utility model is placed in liner lining ring 1 in the socket of pipe fitting 2 when sand molding, plays and supports and styling, thereby prevent the distortion of pipe fitting socket.

Claims (1)

1. a pipe fitting socket liner lining ring is characterized in that described liner lining ring (1) is made by covering the sand material.

Images