CN214108707U

CN214108707U - Mold with exhaust core bar for manufacturing flow channel mud core

Info

Publication number: CN214108707U
Application number: CN202022663815.1U
Authority: CN
Inventors: 陈呈祥; 吴俊俊; 侯风芹; 黄晓庆
Original assignee: CRRC Changzhou Auto Parts Co Ltd
Current assignee: CRRC Changzhou Auto Parts Co Ltd
Priority date: 2020-11-17
Filing date: 2020-11-17
Publication date: 2021-09-03
Anticipated expiration: 2030-11-17

Abstract

The utility model relates to a mould of area exhaust core bone preparation runner loam core belongs to the casting field. When the runner core sand is manufactured by low-strength precoated sand and a turbine shell is poured, the runner core sand is insufficient in strength, so that the runner blocking phenomenon of an airflow chamber can be caused, and potential safety hazards can appear on turbine shell products. The conventional method is to increase the strength of the precoated sand, but can also cause the gas evolution of the flow channel sand core to increase, so that the turbine shell has the defects of gas holes, the compactness of the turbine shell is influenced, the power of the turbocharger can still be reduced, and the problem of safety risk also exists. The runner loam core made of the core bar with the exhaust function can increase the strength of the runner loam core and simultaneously eliminate gas evolution of the runner loam core in the pouring process, thereby eliminating runner blockage and preventing the casting from having the air hole defect.

Description

Mold with exhaust core bar for manufacturing flow channel mud core

Technical Field

The utility model belongs to the casting field, specific mould of band-pass exhaust core bone preparation runner loam core that says so.

Background

With the development of the turbocharger industry, higher requirements are put on a core part turbine shell in the turbocharger. The amount of gas lost into and out of the turbine housing determines the operating efficiency of the turbocharger. The compactness of the turbine shell and the openness of the gas flow passage chamber are used for ensuring that the energy loss of the gas is minimized. In order to ensure the above characteristics of the turbine shell, when the turbine shell is cast, the traditional casting method is to manufacture the runner core before casting the whole body. When the casting method for manufacturing the core is utilized, if the strength of the runner sand core is not enough, the runner sand core can be damaged, deformed and even cracked in the pouring process. The inner wall of the gas flow passage chamber of the turbine shell is enabled to have crust, burrs can block the flow passage, and even the inner wall becomes thick to cause waste. And the blockage of the gas channel chamber becomes a serious quality risk, and hidden dangers can be buried in the safety performance of the turbocharger and the whole vehicle.

In order to eliminate the risk of blocking the runner, the strength of precoated sand used for manufacturing the runner core is increased by a general measure, but the gas forming amount of the runner core is increased, so that the defect of gas holes is caused when a turbine shell is poured, the compactness of the turbine shell is influenced, the power of a turbocharger is still reduced, and the safety risk is also caused.

SUMMERY OF THE UTILITY MODEL

Aiming at the problems and the defects in the prior art, the utility model provides a mould with an exhaust core bar for manufacturing a flow channel loam core, which can enhance the strength of the flow channel loam core when using low-strength precoated sand to manufacture the flow channel loam core, thereby eliminating the safety risk of flow channel blockage; the same low-strength precoated sand has the effect of low gas generation, and the used core rod has the exhaust function, so that the gas generation in the pouring and cooling processes can be timely exhausted, the defect of gas holes is eliminated, and the compactness of the turbine shell is ensured.

In order to achieve the above object, the utility model provides a following technical scheme: a mould with an exhaust core for manufacturing a mud core of a flow passage comprises a core, a static mould and a movable mould, wherein the core is a pipe with openings at two ends and a hollow middle part, and a plurality of exhaust through holes are arranged on a pipe body; the top surface of the static mould is contacted with the bottom surface of the movable mould; the bottom surface of the movable mold is provided with an annular groove; the core bar is arranged in the groove; and a cavity of the mud core of the runner is formed between the static die and the movable die during die assembly.

Specifically, the top surface of the static mold is provided with a plurality of positioning pins; and positioning holes are formed in the bottom surface of the movable die and correspond to the positioning pins one by one when the static die and the movable die are closed. The arrangement can ensure that the whole die is stable and has no dislocation after the static die and the movable die are assembled, thereby ensuring the quality of core making.

Specifically, the core rod is a circular hollow tube, the tube body is set to be L-shaped, a plurality of exhaust through holes are uniformly formed in the tube body at the long end of the tube body, and the tube body at the short end of the tube body is not provided with the exhaust through holes. The arrangement is that the vent holes on the long end pipe body are used for collecting gas generated in the pouring process, and the gas is discharged from the opening at one end of the short end pipe body, so that the core rod has the function of exhausting gas.

Specifically, the core bar is a steel core bar. This arrangement may increase the strength of the core itself.

Specifically, a fixing device and a positioning groove are arranged in a groove on the movable die; the long end of the core rod is arranged in the positioning groove, and the opening side of the short end is fixed by the fixing device. The core bar is convenient to adsorb and fix on the die to manufacture the runner loam core, and the core bar is prevented from shifting during core manufacturing.

Specifically, the fixing device is a high-temperature magnet. The high-temperature magnet can resist high temperature when the core is manufactured by the mould, and can adsorb the core bone by utilizing magnetism to play a role in fixing,

compared with the prior art, the beneficial effects of the utility model reside in that:

1. the utility model discloses a set up the core bone, can utilize low strength tectorial membrane sand to make the runner loam core when making the runner loam core, the core bone plays the purpose of reinforcing runner loam core intensity, and in later stage pouring process, the runner loam core can not appear damaged, warp, the condition of cracking even eliminates the risk that the runner blockked up, has guaranteed the casting quality of turbine shell, and low strength tectorial membrane sand simple manufacture simultaneously, and the price is low, has reduced manufacturing cost.

2. The runner loam core made of the low-strength precoated sand has the effect of low gas generation, and the core bone has the exhaust function, so that the gas can be effectively exhausted in the casting and cooling processes, the defect of gas holes is eliminated, and the compactness of the turbine shell is ensured.

Drawings

Figure 1 is a schematic view of a flow path core;

FIG. 2 is a schematic illustration of a core;

FIG. 3 is a front view of the core;

FIG. 4 is a left side view of the core;

FIG. 5 is a cross-sectional view of a core;

FIG. 6 is a view of a runner core mold;

FIG. 7 is a movable mold right side view of the runner core mold;

FIG. 8 is a front view of a flow channel core;

figure 9 is a left side view of the flow path core.

In the figure: 1. a core with an exhaust function; 2. a flow channel core; 3. static molding; 4. moving the mold; 5. a high temperature magnet; 6. and (6) positioning a groove.

Detailed Description

In order to make the utility model realize that technical means, creation characteristics, achievement purpose and efficiency are easily understood and known, the following will combine the embodiment of the utility model provides an in the drawings, further explain the utility model discloses.

Referring to fig. 1-9, the present embodiment discloses a mold for manufacturing a flow channel loam core with an exhaust core, which includes a core 1, a stationary mold 3 and a movable mold 4, wherein the core 1 is a tube with two open ends and a hollow middle part, and a plurality of exhaust through holes are arranged on the tube body; the top surface of the static mold 3 is contacted with the bottom surface of the movable mold 4; the bottom surface of the movable mold 4 is provided with an annular groove; the core rod 1 is arranged in the groove; and a cavity of the mud core of the runner is formed between the static mold 3 and the movable mold 4 when the molds are closed. The top surface of the static mould 3 is provided with a plurality of positioning pins; the bottom surface of the movable mold 4 is provided with positioning holes corresponding to the positioning pins, and when the stationary mold 3 and the movable mold 4 are assembled, the positioning holes correspond to the positioning pins one by one. The core rod 1 is a circular hollow pipe, the pipe body is arranged to be L-shaped, a plurality of exhaust through holes are evenly formed in the pipe body at the long end of the pipe body, the pipe body at the short end of the pipe body is not provided with the exhaust through holes, and the core rod 1 is made of steel. The formation of the core rod 1 is realized. A fixing device and a positioning groove 6 are arranged in the groove on the movable mold 4; the long end of the core rod 1 is installed in the positioning groove 6, and the short end opening side is fixed by a fixing device. The installation of the core rod 1 in the movable mold 4 is realized. The fixing device is a high-temperature magnet 5. The construction of the fixing device is realized.

The working principle is as follows: 1. manufacturing the core rod 1: a circular hollow steel pipe is used, the size of the steel pipe is phi 10mm in outer diameter and phi 6mm in inner diameter, an L-shaped core 1 is manufactured, a plurality of exhaust through holes are uniformly drilled in the long-end pipe body of the core 1, the size of each through hole is phi 2 +/-0.5 mm, and finally a layer of preservative film is wrapped on the outer ring of the core 1 to prevent coated sand from entering the core when a flow channel mud core is manufactured and blocking an exhaust passage.

2. And a high-temperature magnet 5 and a positioning groove 6 are additionally arranged in the groove of the movable mold 4.

3. Manufacturing the mud core with the exhaust core bone runner: the long end of the core rod 1 is placed in the positioning groove 6 of the movable mold 4, and the opening side of the short end is fixed by the high-temperature magnet 5 in an adsorption mode. And then, putting low-strength precoated sand into the mold, closing the static mold 3 and the movable mold 4 and fixing to manufacture a runner core mud blank, obtaining the runner core mud blank after the precoated sand is completely solidified, putting the runner core mud blank into a drying room at 180 +/-20 ℃ for baking for 120 +/-10 min to melt a preservative film on the outer ring of the core bar 1, so that the core bar 1 has an exhaust function, thereby obtaining the runner core mud, wherein the runner core mud has high strength and low gas generation performance while exhausting gas.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the invention without departing from the spirit and scope of the invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a mould of runner loam core is made to core bone that exhausts in area, includes core bone (1), quiet mould (3) and movable mould (4), its characterized in that: the core rod (1) is a tube with two open ends and a hollow middle part, and a plurality of exhaust through holes are arranged on the tube body; the top surface of the static mould (3) is contacted with the bottom surface of the movable mould (4); the bottom surface of the movable mold (4) is provided with an annular groove; the core rod (1) is arranged in the groove; and a cavity of the mud core of the runner is formed between the static die (3) and the movable die (4) during die assembly.

2. The mold with the exhaust core rod for manufacturing the mud core of the runner as claimed in claim 1, wherein: the top surface of the static die (3) is provided with a plurality of positioning pins; and positioning holes are formed in the bottom surface of the movable mold (4) and correspond to the positioning pins, and when the static mold (3) and the movable mold (4) are closed, the positioning holes correspond to the positioning pins one to one.

3. The mold with the exhaust core rod for manufacturing the mud core of the runner as claimed in claim 1, wherein: the core rod (1) is a circular hollow pipe, the pipe body is arranged to be L-shaped, a plurality of exhaust through holes are uniformly formed in the pipe body at the long end of the pipe body, and the pipe body at the short end of the pipe body is not provided with the exhaust through holes.

4. The mold with the exhaust core rod for manufacturing the mud core of the runner as claimed in claim 3, wherein: the core rod (1) is a steel core rod.

5. The mold with the exhaust core rod for manufacturing the mud core of the runner as claimed in claim 1, wherein: a fixing device and a positioning groove (6) are arranged in the groove on the movable mold (4); the long end of the core rod (1) is arranged in the positioning groove (6), and the opening side of the short end is fixed by the fixing device.

6. The mold with the exhaust core rod for manufacturing the mud core of the runner as claimed in claim 5, wherein: the fixing device is a high-temperature magnet (5).