CN219561305U

CN219561305U - Investment shell for casting slender hole castings

Info

Publication number: CN219561305U
Application number: CN202223511921.3U
Authority: CN
Inventors: 张建军
Original assignee: Nantong Steel Machinery Manufacturing Co ltd
Current assignee: Nantong Steel Machinery Manufacturing Co ltd
Priority date: 2022-12-28
Filing date: 2022-12-28
Publication date: 2023-08-22
Anticipated expiration: 2032-12-28

Abstract

The utility model discloses an investment shell for casting an elongated hole casting, which comprises a base, wherein an exhaust mechanism and a sliding frame are respectively arranged on the upper end surface of the base, and the upper end of the exhaust mechanism is provided with a shell; the utility model has simple structure and reasonable design, realizes the rapid removal of air generated in the pouring process of molten iron through the air exhaust mechanism, avoids the attachment of air bubbles generated in the pouring process on the inner side wall of the shell or the retention of air bubbles in the casting to be formed together with the casting, reduces the adverse effect of the air bubbles on the surface finish of the casting, improves the overall quality, the surface finish and the working strength of the slender hole casting, better meets the current production requirements of the slender hole casting, and simultaneously amplifies the movement effect of the shell under the action of the spring, but improves the stability in the movement process by matching with the sliding frame, ensures that the unset molten iron can not overflow while the air bubbles are discharged, and improves the efficiency of the shell to discharge the air bubbles.

Description

Investment shell for casting slender hole castings

Technical Field

The utility model relates to the technical field of casting equipment, in particular to an investment shell for casting an elongated hole casting.

Background

Investment casting is also called precision casting or lost wax casting, which is to make an accurate fusible model by using fusible materials, coat a plurality of layers of refractory coating on the model, dry and harden the model into an integral model shell, heat the model for shell fusion, bake the model at high temperature into a refractory model shell, finally pour liquid metal into the model shell, and demold the model after cooling to obtain a casting, which is usually adopted when casting an elongated hole casting.

The prior art has the following defects:

at present, an investment shell for casting an elongated hole casting is prepared by pouring molten iron into the shell through a preset runner or through a hole forming mode, demoulding is carried out after cooling and shaping is carried out, and the formed elongated hole casting is taken out.

Disclosure of Invention

The present utility model aims to provide an investment shell for casting elongated hole castings, which solves the problems set forth in the background art.

In order to achieve the above purpose, the present utility model provides the following technical solutions: an investment shell for casting an elongated hole casting comprises a base, wherein an exhaust mechanism and a sliding frame are respectively arranged on the upper end face of the base, and the upper end of the exhaust mechanism is provided with the shell;

the exhaust mechanism comprises:

the driving assembly is arranged on the upper end face of the base;

the elliptical wheel is arranged on the driving assembly, one side of the elliptical wheel is rotationally connected with a connecting rod, and the upper end of the connecting rod is rotationally connected with a mounting cylinder;

the spring is arranged on the lower end face inside the mounting cylinder, and the upper end of the spring is provided with a bottom cover.

Preferably, the upper end of the sliding frame is provided with a sliding sleeve, and the inner side wall of the sliding sleeve is provided with a plurality of pulleys.

Preferably, the driving assembly includes:

the motor is arranged on the upper end face of the base, the output end of the motor is connected with a first transmission shaft, a first gear is arranged on the first transmission shaft, and the other end of the first transmission shaft is movably arranged on the upper end face of the base;

the second transmission shaft is movably arranged on the upper end face of the base, a second gear is arranged on the second transmission shaft, a transmission belt is connected between the second gear and the first gear in a meshed mode, and the elliptical wheel is arranged at one ends of the first transmission shaft and the second transmission shaft.

Preferably, the upper end of the shell is provided with a ventilation cover, and a plurality of ventilation holes matched with the shell are formed in the ventilation cover.

Preferably, the inner side walls of the bottom cover and the ventilation cover are respectively provided with a convex strip, and the outer walls of the upper end and the lower end of the shell are respectively provided with a groove matched with the convex strips.

Preferably, a carbon layer is arranged on the inner side wall of the shell.

Preferably, an iron wire is pre-buried in the shell of the shell.

Compared with the prior art, the utility model has the beneficial effects that:

1. according to the investment mold shell for casting the slender hole castings, the exhaust mechanism is arranged and comprises the elliptical wheel, the connecting rod, the mounting cylinder, the spring and the bottom cover, so that air generated in the molten iron casting process is rapidly exhausted, bubbles generated in the casting process are prevented from being attached to the inner side wall of the mold shell or remaining in the castings to be molded together with the castings, adverse effects of the bubbles on the surface finish of the castings are reduced, the overall quality, the surface finish and the working strength of the slender hole castings are improved, and the current slender hole casting production requirements are met;

2. according to the investment shell for casting the slender hole castings, due to the fact that the sliding frame and the springs are arranged, the movement effect of the shell is amplified under the action of the springs, but the sliding frame is matched, stability in the movement process is improved, the fact that the bubbles are discharged and the unset molten iron cannot overflow is guaranteed, and the efficiency of discharging the bubbles from the shell is improved.

Drawings

FIG. 1 is an overall front view of the present utility model;

FIG. 2 is a schematic view of the internal structure of the present utility model;

FIG. 3 is a rear view of the drive mechanism of the present utility model;

FIG. 4 is a top view of the drive mechanism of the present utility model;

fig. 5 is an enlarged schematic view of fig. 2 at a in accordance with the present utility model.

In the figure: 1. a base; 2. an exhaust mechanism; 201. an elliptical wheel; 202. a connecting rod; 203. a mounting cylinder; 204. a spring; 205. a bottom cover; 3. a carriage; 301. a sliding sleeve; 302. a pulley; 4. a shell; 5. a drive assembly; 501. a motor; 502. a first drive shaft; 503. a first gear; 504. a second drive shaft; 505. a second gear; 506. a drive belt; 6. a ventilation cover; 601. ventilation holes; 7. a convex strip; 701. a groove; 8. and (3) an iron wire.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

In the description of this patent, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the terms in this patent will be understood by those of ordinary skill in the art as the case may be.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a number" is two or more, unless explicitly defined otherwise.

Examples

Referring to fig. 1-5, the utility model provides an investment shell technical scheme for casting an elongated hole casting, which comprises the following steps: an investment shell for casting an elongated hole casting comprises a base 1, wherein an exhaust mechanism 2 and a sliding frame 3 are respectively arranged on the upper end surface of the base 1, and a shell 4 is arranged at the upper end of the exhaust mechanism 2; the exhaust mechanism 2 comprises a driving component 5, an elliptical wheel 201 and a spring 204, wherein the driving component 5 is arranged on the upper end face of the base 1, the elliptical wheel 201 is arranged on the driving component 5, one side of the elliptical wheel 201 is rotationally connected with a connecting rod 202 through a pin shaft, the upper end of the connecting rod 202 is rotationally connected with a mounting cylinder 203, the spring 204 is welded on the lower end face inside the mounting cylinder 203, the upper end of the spring 204 is welded with a bottom cover 205, when a slender hole casting needs to be cast, a shell 4 is firstly arranged on the bottom cover 205, after molten iron is cast into a cavity of the shell 4, the driving component 5 is immediately started, the elliptical wheel 201 starts to rotate under the driving of the driving component 5, the elliptical wheel 201 drives the mounting cylinder 203 to move up and down through the connecting rod 202, the mounting cylinder 203 transmits the motion to the shell 4 through the spring 204 and the bottom cover 205, and the motion effect of the shell 4 is further amplified under the action of the spring 204, thereby shake the bubble on the inner wall off the inner wall, come up to the molten iron surface and break, through exhaust mechanism 2, realized discharging fast the air that produces in the molten iron pouring process, avoided the bubble that produces in the pouring process to adhere to on the inside wall of shell 4 or remain inside the foundry goods and take shape along with the foundry goods, reduced the adverse effect of bubble to foundry goods surface finish, improved slim hole foundry goods's overall quality, surface finish and working strength, more accord with current slim hole foundry goods production demand, the motion effect of shell 4 is enlarged under the effect of spring 204 simultaneously, but cooperate carriage 3, stability in the motion process is nevertheless improved, ensure that the bubble is discharged simultaneously unset molten iron can not spill, the efficiency of shell 4 discharge bubble has been improved.

The sliding sleeve 301 is welded at the upper end of the sliding frame 3, a plurality of pulleys 302 are rotatably connected to the inner side wall of the sliding sleeve 301, the sliding frame 3 and the sliding sleeve 301 can ensure that the shell 4 only moves in the vertical direction and does not move horizontally, and the pulleys 302 can reduce friction force between the sliding sleeve 301 and the outer side wall of the shell 4, so that movement is smoother.

The driving assembly 5 comprises a motor 501 and a second driving shaft 504, the motor 501 is arranged on the upper end face of the base 1 through a bracket, the output end of the motor 501 is connected with a first driving shaft 502, a first gear 503 is arranged on the first driving shaft 502, the other end of the first driving shaft 502 is movably arranged on the upper end face of the base 1 through a bracket, the second driving shaft 504 is movably arranged on the upper end face of the base 1 through a bracket, a second gear 505 is arranged on the second driving shaft 504, a driving belt 506 is connected between the second gear 505 and the first gear 503 in a meshed manner, the elliptical wheel 201 is arranged at one ends of the first driving shaft 502 and the second driving shaft 504, when the driving assembly 5 is required to be started, the motor 501 is started to drive the first driving shaft 502 to rotate, and the first driving shaft 502 drives the second driving shaft 504 to rotate through the first gear 503, the second gear 505 and the driving belt 506, so that synchronous rotation of the two elliptical wheels 201 is realized.

The upper end of the mold shell 4 is sleeved with a ventilation cover 6, a plurality of ventilation holes 601 matched with the mold shell 4 are formed in the ventilation cover 6, bubbles are broken after rising from the inside of the mold shell 4, and gas can overflow through the ventilation holes 601.

The sand grip 7 has all been seted up on the inside wall of bottom 205 and ventilative lid 6, all set up on the outer wall at both ends about the shell 4 with sand grip 7 assorted recess 701, when installing the shell 4, push down the lower extreme of shell 4 into in the bottom 205 through sliding sleeve 301, feel twice in the pressing process and break through the sense, the sand grip 7 that indicates the lower extreme of shell 4 and the recess 701 chucking of bottom 205 lower extreme, later with ventilative lid 6 press into the upper end of shell 4, feel twice break through the sense can, assorted sand grip 7 and recess 701 can make the junction of upper and lower both ends of shell 4 and bottom 205 and ventilative lid 6 better sealed.

The inner side wall of the shell 4 is coated with a carbon layer, and the carbon layer can increase the surface hardness of the casting and also is beneficial to the later demoulding.

An iron wire 8 is embedded in the shell of the shell 4, the iron wire 8 can enhance certain toughness of the shell 4, and meanwhile, the shell 4 can be enabled to fall off in a sheet mode through the iron wire 8 during demolding, so that the operation difficulty of demolding is reduced.

The working principle of the utility model is as follows:

when the investment shell for casting the elongated hole castings is used, firstly, the lower end of the shell 4 passes through the sliding sleeve 301 to be pressed into the bottom cover 205, the two breakthrough senses are felt in the pressing process, namely, the raised line 7 at the lower end of the shell 4 and the groove 701 at the lower end of the bottom cover 205 are tightly clamped, after molten iron is poured into the cavity of the shell 4, the air permeable cover 6 is pressed into the upper end of the shell 4, the two breakthrough senses are felt, then the motor 501 is started, the motor 501 drives the first transmission shaft 502 to rotate, the first transmission shaft 502 drives the second transmission shaft 504 to rotate through the first gear 503, the second gear 505 and the transmission belt 506, so that synchronous rotation of the two elliptic wheels 201 is realized, the elliptic wheels 201 drive the installation cylinder 203 to move up and down through the connecting rod 202, the installation cylinder 203 transmits the motion to the shell 4 through the spring 204 and the bottom cover 205, the motion effect of the shell 4 is further amplified under the action of the spring 204, so that bubbles on the inner wall are removed from the inner wall to the surface of molten iron are floated, and after the molten iron is completely cooled and solidified, the elongated castings can be obtained after the shell 4 is removed from the bottom cover 205; the utility model has simple structure and reasonable design, realizes the rapid discharge of air generated in the pouring process of molten iron through the air discharge mechanism 2, avoids the attachment of air bubbles generated in the pouring process on the inner side wall of the shell 4 or the retention of air bubbles in the casting to be formed together with the casting, reduces the adverse effect of the air bubbles on the surface finish of the casting, improves the overall quality, the surface finish and the working strength of the slender hole casting, more meets the current production requirements of the slender hole casting, and simultaneously amplifies the movement effect of the shell 4 under the action of the spring 204, but improves the stability in the movement process by matching with the sliding frame 3, ensures that the unset molten iron can not overflow while the air bubbles are discharged, and improves the air bubble discharge efficiency of the shell 4.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims

1. An investment shell for casting elongated hole castings, comprising a base (1), characterized in that: an exhaust mechanism (2) and a sliding frame (3) are respectively arranged on the upper end face of the base (1), and a shell (4) is arranged at the upper end of the exhaust mechanism (2);

the exhaust mechanism (2) comprises:

the driving assembly (5) is arranged on the upper end face of the base (1);

the elliptical wheel (201) is arranged on the driving assembly (5), one side of the elliptical wheel (201) is rotatably connected with a connecting rod (202), and the upper end of the connecting rod (202) is rotatably connected with a mounting cylinder (203);

the spring (204), spring (204) set up on the inside lower terminal surface of installation section of thick bamboo (203), the upper end of spring (204) is provided with bottom (205).

2. The investment shell of claim 1, wherein the investment casting comprises: the sliding frame is characterized in that a sliding sleeve (301) is arranged at the upper end of the sliding frame (3), and a plurality of pulleys (302) are arranged on the inner side wall of the sliding sleeve (301).

3. The investment shell of claim 1, wherein the investment casting comprises: the driving assembly (5) comprises:

the motor (501), the motor (501) is set up on the up end of the base (1), the output end of the said motor (501) is connected with the first drive shaft (502), there is the first gear (503) on the said first drive shaft (502), the another end of the said first drive shaft (502) is set up on the up end of the base (1) movably;

the second transmission shaft (504), second transmission shaft (504) activity sets up on the up end of base (1), be provided with second gear (505) on second transmission shaft (504), meshing is connected with driving belt (506) between second gear (505) and first gear (503), oval wheel (201) set up the one end at first transmission shaft (502) and second transmission shaft (504).

4. The investment shell of claim 1, wherein the investment casting comprises: the upper end of the shell (4) is provided with a ventilation cover (6), and a plurality of ventilation holes (601) matched with the shell (4) are formed in the ventilation cover (6).

5. The investment shell of claim 4, wherein the investment casting comprises: the bottom cover (205) and the ventilation cover (6) are provided with raised strips (7) on the inner side walls, and grooves (701) matched with the raised strips (7) are formed in the outer walls of the upper end and the lower end of the shell (4).

6. The investment shell of claim 1, wherein the investment casting comprises: and a carbon layer is arranged on the inner side wall of the shell (4).

7. The investment shell of claim 1, wherein the investment casting comprises: an iron wire (8) is embedded in the shell of the shell (4).