CN217121669U

CN217121669U - Cold iron sand core injection system for end cover casting

Info

Publication number: CN217121669U
Application number: CN202220377218.9U
Authority: CN
Inventors: 孙玉峰; 回春华; 张宝富
Original assignee: Dalian Bingshan Metal Technology Co Ltd
Current assignee: Dalian Bingshan Metal Technology Co Ltd
Priority date: 2022-02-24
Filing date: 2022-02-24
Publication date: 2022-08-05
Anticipated expiration: 2032-02-24

Abstract

The utility model belongs to the technical field of the casting technology. In particular to a cold iron sand core injection system for end cover casting, which is used on a DISA line vertical parting molding line. The cold iron sand core shooting system for end cover casting comprises a core box movable die, a core box stationary die and a core shooting machine, wherein a cold iron is arranged in the core box movable die, a sand core slow cooling layer with a certain thickness is reserved between the working surface of the cold iron and the core box stationary die, a cylindrical magnet with certain magnetic force adsorption is arranged on the core box movable die on the upper portion of the cold iron to adsorb the cold iron on the side wall of the core box, and the core shooting machine is provided with a plurality of ejector rod rods on the side of the core box movable die and corresponds to the cold iron. The utility model discloses in placing the core box with the chill when penetrating the core, the psammitolite penetrates to make the chill and can implant in the psammitolite, and structural design is simple ingenious, and the chill can eliminate the thick major part position shrinkage porosity defect of foundry goods, good solution the chill can use in DISA line molding problem.

Description

Cold iron sand core injection system for end cover casting

Technical Field

The utility model belongs to the technical field of the casting technology. In particular to a cold iron sand core injection system for end cover casting, which is used on a DISA line vertical parting molding line.

Background

The number 6036171 end cover is a thicker casting produced by a company, is an end cover on a valve body (shown in figure 2) used on an engineering truck, is made of nodular cast iron 80-55-6 (equivalent to QT550-7 of the national standard), and has higher requirement on mechanical property. It has two important areas (see fig. 2) and requires no shrinkage porosity. Shrinkage porosity cannot be completely eliminated by feeding only by using a riser, and another effective method for eliminating local shrinkage porosity of a casting is to use external chill. The cold iron is convenient to use under the conditions of horizontal parting and general mechanical molding production process, but is difficult to use under the conditions of vertical parting of the DISA line and high automation degree, so that the problem to be solved is how to apply the cold iron in the DISA line molding.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the problem that above-mentioned prior art exists, provide an end cover casting that uses on the perpendicular somatotype line of DISA line and penetrate system with chill psammitolite.

The utility model discloses a realize that the technical scheme that above-mentioned purpose was taken is: the cold iron sand core shooting system for end cover casting comprises a core box movable die, a core box stationary die and a core shooting machine and is characterized in that a cold iron is arranged in the core box movable die, a sand core slow cooling layer with a certain thickness is reserved between the working surface of the cold iron and the core box stationary die, a cylindrical magnet which adsorbs magnetic force is arranged on the core box movable die on the upper portion of the cold iron, the cold iron is adsorbed on the side wall of the core box, and the core shooting machine is provided with a plurality of ejector rod cores on the side of the core box movable die and corresponds to the cold iron.

The chilling block is laterally and vertically arranged on the side wall of the core box moving die, the chilling block is made of common cast iron and is semicircular in shape, and the lower part of the upper part of the chilling block is provided with a through hole respectively to be connected with the chilling block working surface.

The cylindrical magnet is embedded in the white steel sleeve and locked by the jackscrew, and the adsorption force of the cylindrical magnet is 0.5-1.5 kg.

The white steel sleeve is fixed on the core box movable die by a fastening screw.

The drawing inclination of the static die side of the core box is 2 degrees larger than that of the moving die of the core box.

The thickness of the sand core slow cooling layer is 3-5 mm.

The utility model discloses in placing the core box with the chill when penetrating the core, the psammitolite penetrates to make the chill and can implant in the psammitolite, and structural design is simple ingenious, and the chill can eliminate the thick major part position shrinkage porosity defect of foundry goods, good solution the chill can use in DISA line molding problem.

Drawings

Figure 1 is an end cap casting numbered 6036171.

FIG. 2 is a front view of a cast part.

Fig. 3 is a cross-sectional view of fig. 2.

Fig. 4 is a rear view of fig. 2.

Fig. 5 is a front view of the chiller.

Fig. 6 is a longitudinal sectional view of fig. 5.

Fig. 7 is a sectional view taken along line a-a in fig. 5.

Fig. 8 is a diagram showing the position of the chill embedded in the sand core.

Fig. 9 is a diagram of a sand core injection system.

In the figure, 1, a core box moving die, 2, a core box static die, 3, a chill, 4, a core ejecting rod, 5, a white steel sleeve, 6, a fastening screw, 7, a cylindrical magnet, 8, an ejector pin, 9, a sand core, 10, a left sand mold, 11, a right sand mold, 12, a casting, 13, a parting surface, 14, a chill working surface, b and the thickness of a sand core slow cooling layer.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Examples

As shown in fig. 8, the cold iron sand core shooting system for end cover casting comprises a core box movable die 1, a core box stationary die 2 and a core shooting machine, wherein a cold iron 3 is arranged in the core box movable die 1, a sand core slow cooling layer with a certain thickness is reserved between a cold iron working surface 14 and the core box stationary die 2, a cylindrical magnet 7 which can adsorb magnetic force is arranged on the core box movable die 1 on the upper portion of the cold iron 3, the cold iron 3 is adsorbed on the side wall of the core box, and the core shooting machine is provided with a plurality of ejector rod 4 on the side of the core box movable die 1 and corresponds to the position of the cold iron 3.

The chilling block 3 is arranged on the side wall of the core box moving die 1 in a standing mode, is made of common cast iron and is semicircular in shape, and the lower portion of the upper portion of the chilling block is provided with a through hole respectively to be connected with a chilling block working surface.

The cylindrical magnet 7 is embedded in the white steel sleeve 5 and locked by the jackscrew 8, and the adsorption force of the cylindrical magnet 7 is 0.5-1.5 kg.

The white steel sleeve 5 is fixed on the core box movable die 1 by a fastening screw 6.

The drawing inclination of the side of the core box static die 2 is 2 degrees larger than that of the core box movable die 1.

The thickness b of the sand core slow cooling layer is 3-5 mm.

The utility model discloses implementation process:

1. manufacturing a cold iron: and mounting a chill model at the idle positions of other molds, pouring the chill, and polishing. Because the material of the chiller is not required, the chiller can be produced as long as the template has a vacant site.

2. And (3) sand core injection: (1) and (3) placing a chilling block, wherein the chilling block 3 is arranged on one side of the core box movable die 1 during the process design of the sand core, and the chilling block is laterally and vertically leaned on the side wall of the core box movable die. In order to prevent the chilling block from falling and falling off leftwards, a cylindrical magnet 7 with certain adsorption magnetic force is arranged on the upper portion of the chilling block 3 on the core box movable die 1, and the chilling block 3 is adsorbed on the side wall of the core box. (2) The slow cooling layer is arranged on the working surface of the chilling block 3, a gap with the thickness of 'b' mm is reserved between the working surface of the chilling block 3 and the core box static die 2, and after the sand core is injected, the sand core slow cooling layer with the thickness of 'b' mm is formed at the gap. (3) The cylindrical magnet 7 is selected, the adsorption force of the cylindrical magnet 7 is moderate and cannot be too large, so that the cold iron and the sand core are prevented from being separated due to the fact that the sand core is adsorbed too tightly during coring. The size of the adsorption force of the cylindrical magnet 7 is controlled by the magnetism and the cross-sectional area of the magnet and is determined through experiments. (4) The cylindrical magnet 7 is positioned, and the cylindrical magnet 7 is embedded in the white steel sleeve 5 and locked by the jackscrew 8. The white steel sleeve 5 is arranged on the core box movable die 1 through a fastening screw 6. (5) And (4) taking out the sand core, and after the sand core is injected and cured, carrying out sand core taking-out operation. When the sand core is taken out, the core box movable die 1 moves rightwards, and because the drawing slope of the side of the core box static die 2 is 2 degrees larger than that of the core box movable die 1, the sand core stays on the core box movable die 1, and the movable die moves away from the static die together with the movable die. When the movable die moves rightwards, the core ejecting rods 4 (a plurality of core ejecting rods) on the outer side of the movable die push the sand cores out of the movable die, and then an operator takes away the sand cores. And (5) completing injection of the sand core with the chilling block.

3. And (4) molding and setting the core, wherein the sand core can be used for molding after being injected. And on the DISA line, a sand core with a chill is placed into the casting mold by using a lower core frame, and casting is carried out after mold assembly. The cold iron is placed in the sand core instead of being placed in the traditional process method during modeling, so that the problem that the cold iron cannot be used on the DISA line is solved.

4. Because the surface of the chilling block is provided with a slow cooling layer and other novel processes, the qualified 6036171 nodular cast iron end cover with larger wall thickness is successfully produced. The inner part of the thick wall of the end cover has no shrinkage porosity defect, and the surface of the end cover has no chilled abnormal tissue.

Claims

1. The cold iron sand core shooting system for end cover casting comprises a core box movable die, a core box stationary die and a core shooting machine and is characterized in that a cold iron is arranged in the core box movable die, a sand core slow cooling layer with a certain thickness is reserved between the working surface of the cold iron and the core box stationary die, a cylindrical magnet which adsorbs magnetic force is arranged on the core box movable die on the upper portion of the cold iron, the cold iron is adsorbed on the side wall of the core box, and the core shooting machine is provided with a plurality of ejector rod cores on the side of the core box movable die and corresponds to the cold iron.

2. The end cap casting chill core shooting system of claim 1, wherein the chill is supported on the sidewall of the core box moving mold in a side-standing manner, is made of common cast iron, is semicircular in shape, and has a through hole at each of the upper and lower parts thereof for connecting with the chill working surface.

3. The end cover casting chill sand core injection system as claimed in claim 1, wherein the cylindrical magnet is embedded in the white steel sleeve and locked by a jackscrew, and the adsorption force of the cylindrical magnet is 0.5-1.5 kg.

4. The end cap casting chill sand core shooting system of claim 3, wherein said white steel sleeve is fixed to the core box moving die by fastening screws.

5. The end cap casting chill core shooting system of claim 1, wherein the core box stationary mold side draft angle is 2 ° greater than the core box movable mold.

6. The cold iron core injection system for end cover casting of claim 1, wherein the thickness of the slow cooling layer of the core is 3-5 mm.