CN112404367A

CN112404367A - Investment casting process

Info

Publication number: CN112404367A
Application number: CN202011188735.3A
Authority: CN
Inventors: 张新华; 卢丽娟; 刘小明; 王秀庆; 郑志程
Original assignee: University of Shaoxing
Current assignee: University of Shaoxing
Priority date: 2020-10-30
Filing date: 2020-10-30
Publication date: 2021-02-26
Anticipated expiration: 2040-10-30
Also published as: CN112404367B

Abstract

The invention discloses an investment casting process, which comprises the following steps: s1: after a wax mold is manufactured on a mold rod, the mold rod is clamped into the mounting frame on the left side, and the wax mold is conveyed to a first slurry coating conveying track through a conveying belt; s2, after the first steering engine is transmitted to the mounting rack on the left side by the first conveying track, the first electric claw grabs the mold rod and transmits the mold rod to the slurry coating mechanism through the first conveying track; and S3, rotating the first steering engine to drive the wax mold to rotate, and spraying the wax mold by a spray head assembly of the slurry coating mechanism. The invention can realize automatic investment casting.

Description

Investment casting process

Technical Field

The invention relates to the technical field of investment casting, in particular to an investment casting process.

Background

Investment casting is also called dewaxing casting or lost wax casting, the production process of investment casting mainly comprises wax pressing, wax trimming, tree assembling, shell making, shell roasting, pouring, shelling, post-treatment, inspection and the like, the processed metal parts are generally copied in batch by using fusible materials (such as wax materials, plastics and the like) as a copy, a fusible mold is pressed on a wax injection machine by using a metal mold, then a plurality of layers of refractory materials are coated on the fusible mold, the refractory material coating is dried and hardened to form the shell, for example, the wax mold is selected to be steam or hot water to melt the wax mold from the shell, and then the fusible materials in the shell are melted to flow out. And (3) roasting the shell to be firm, pouring molten liquid metal into the shell, cooling and solidifying the liquid metal in the shell, and then shelling to obtain the required metal part. The investment casting can produce precise and complex castings which are close to the final shape of the product, metal parts obtained by the investment casting process can be directly used without mechanical processing or with a small amount of processing, and the investment casting can be widely applied to manufacturing industries of aviation, automobiles, machine tools, ships, internal combustion engines, gas turbines, telecommunication instruments, weapons, medical instruments, cutters and the like.

At present, investment casting is mostly finished manually, an operator holds a metal supporting rod to put an investment tree group into a coating container to be pulled up and down and rotated, so that the coating can completely cover the outer surface of an investment; the investment pattern is stained with and is spilt again behind the thick liquid, and manual work is handed the investment tree group and is stretched into in drenching the sand machine during operation, rotates, action such as slope, makes the sanding even, dries after the sanding, lacks automatic assembly line equipment, and when the above-mentioned operation of repetition, workman's intensity of labour is big, and the operation environment dust is big, the temperature is high, and operational environment is abominable.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide an investment casting process.

In order to achieve the purpose, the invention adopts the following technical scheme:

an investment casting process comprising the steps of:

s1: after the wax mold is manufactured on the mold rod, the mold rod is clamped into the mounting frame on the left side of the conveyor belt and is conveyed to the first slurry coating conveying track of the conveying mechanism through the conveyor belt;

s2, after the first steering engine is transmitted to the mounting frame on the left side by the first conveying track, the first electric claw grabs the mold rod and transmits the mold rod to a slurry coating barrel of the slurry coating mechanism through the first conveying track;

s3, spraying a wax pattern by a spray head component of the slurry coating mechanism, and driving a pattern rod to rotate by a first steering engine so as to uniformly coat slurry on the wax pattern;

s4, a first steering engine rotates the wax mould after spraying to a second slurry coating conveying track, a second electric claw grabs a mould rod, the first electric claw is separated from the wax mould, a first cylinder drives the second electric claw to move downwards to enable the first electric claw to be separated from the mould rod, the first steering engine drives the first electric claw to reset to a conveyor belt for next round of operation, the second steering engine drives the second electric claw to rotate, the first cylinder drives the second electric claw to move upwards, and the lower end of the mould rod is higher than the conveyor belt;

s5: the second electric clamping jaw transmits the wax pattern to the upper part of the conveyor belt, a third electric clamping jaw below the sand spraying first conveying track grabs the wax pattern, the second electric clamping jaw is separated from the wax pattern and then resets to the left side of the mortar coating second conveying track, a third steering engine drives the wax pattern to rotate, the wax pattern is conveyed to the sand spraying mechanism, and a second cylinder above the third electric clamping jaw drives the wax pattern to move downwards;

s6: after the electric chuck grabs the mold rod, a push rod of the swing air cylinder extends to enable the swing rod to rotate anticlockwise to be horizontal, the sand spraying steering engine drives the electric chuck to rotate, and the shakeout mechanism shakeout; after the wax mold is uniformly covered with sand materials, the sand pouring steering engine is closed, the push rod of the swing air cylinder retracts, so that the mold rod is reset to be in a vertical state, and the third electric clamping jaw grabs the mold rod and rotates the mold rod to the front by rotating the mold rod by an angle;

s7: the fourth electric clamping jaw snatchs the die rod, and after third electric clamping jaw and the die rod phase separation, the up motion of second cylinder drive third electric clamping jaw, and third steering wheel drive third electric clamping jaw resets, drenches sand second delivery track drive fourth steering wheel along carrying back conveyer belt department, with the mounting bracket on die rod card income conveyer belt right side, the conveyer belt drives the die rod and gets into next process.

The one end and the conveyer belt of mounting bracket pass through the bolt fastening, and the other end of mounting bracket articulates there are two turnings, is equipped with the torsional spring that is used for turning to reset between turning to and the mount, and two turnings are kept away from the mounting bracket and are laminated each other and make to constitute a round hole between turning to and the mounting bracket.

The slurry coating mechanism comprises a slurry coating barrel, and the spraying device is positioned on the front side of the slurry coating barrel; a slurry coating motor is fixed on the side wall of the slurry coating barrel, an annular rail is arranged below the slurry coating barrel, a plurality of smoothly-transitional bulges are arranged on the annular rail, and the slurry coating motor is mutually transmitted with a rotating shaft of the annular rail through a belt; the spraying device comprises a spray head assembly, the spray head assembly can move up and down relative to the slurry coating barrel, and pulleys matched with the annular rail are arranged on the lower portion of the spray head assembly.

The sand sprinkling mechanism comprises a sand sprinkling mechanism support, a swing cylinder is hinged to the upper portion of the sand sprinkling mechanism support, a swing rod is hinged to a push rod of the swing cylinder, the middle of the swing rod is rotatably connected with the sand sprinkling mechanism support, a sand sprinkling steering engine is arranged at one end, away from the swing cylinder, of the swing rod, an electric chuck is connected to a rotating shaft of the sand sprinkling steering engine, and a shakeout mechanism is arranged on the right side of the sand sprinkling mechanism support;

the shakeout mechanism comprises an extension seat arranged on the front side of a sand sprinkling mechanism support seat, a base is arranged on the upper portion of the right side of the receiving barrel, a screen drum is rotatably connected between the base and the extension seat and corresponds to the receiving barrel in position, the screen drum is driven by a sand sprinkling motor, and the receiving barrel is arranged on the right side of the sand sprinkling mechanism support seat;

rotating shaft department of drenching the sand motor is connected with the spiral roll, the helicla flute of spiral roll and a sieve section of thick bamboo rotate relatively, sieve section of thick bamboo and extend and be equipped with first fixed bucket between the seat, first fixed bucket with extend the seat relatively fixed, the spiral roll with extend and be equipped with the bearing between the seat, be equipped with on the bucket wall of first fixed bucket and be used for sand material exhaust passageway, be fixed with the solid fixed cylinder of second on the base, first fixed bucket, the solid fixed cylinder of second and sieve section of thick bamboo relatively fixed, the top of solid fixed cylinder is equipped with the sand funnel that drenches that is used for into sand material.

The transmission mechanism comprises a top seat arranged above the conveyor belt, the top seat is of a Z-shaped structure, a first mortar coating conveying track and a first sand spraying conveying track are arranged on a horizontal section at the lower part of the top seat, a second mortar coating conveying track and a second sand spraying conveying track are arranged on a horizontal section at the upper part of the top seat, the first mortar coating conveying track and the second mortar coating conveying track are arranged between the conveyor belt and the mortar coating mechanism, the first sand spraying conveying track and the second sand spraying conveying track are arranged between the conveyor belt and the mortar spraying mechanism, a first steering engine is arranged below the first mortar coating conveying track, a first electric claw is fixed at a rotating shaft of the first steering engine, a first air cylinder is connected on the second mortar coating conveying track in a sliding manner, a second steering engine is connected after a push rod of the first air cylinder passes through the second mortar coating conveying track, a second electric claw is connected at a rotating shaft of the second steering engine, and a third steering engine is connected below the first sand spraying conveying track in a sliding, a third electric clamping jaw is connected to a rotating shaft of the third steering engine, a second air cylinder is connected to the sand spraying second conveying rail in a sliding mode, a fourth steering engine is connected to a push rod of the second air cylinder after the push rod penetrates through the sand spraying second conveying rail, and a fourth electric clamping jaw is connected to a rotating shaft of the fourth steering engine.

The invention has the beneficial effects that: the automatic operation of the slurry coating and sand spraying ring joint for investment casting is realized, the wax mold is grabbed by the electric jack catch and is transmitted back and forth between the slurry coating mechanism and the sand spraying mechanism, the operation of workers in an environment with large dust is avoided, and the labor intensity of the workers is reduced; 2. the first electric clamping jaw grabs the wax mould and transports the wax mould to the slurry coating barrel, the first steering engine drives the wax mould to rotate, and the wax mould is sprayed through the spray head assembly, so that the use amount of slurry is reduced, and the slurry coating of the wax mould is more uniform; 3. after the electric chuck snatchs the die rod of wax matrix, rotatory to horizontal position under swing cylinder's drive, drench sand steering wheel drive electric chuck and wax matrix and rotate, a sieve section of thick bamboo carries out certain filtration to the sand material for the granule of the sand material that covers on the wax matrix is more even, has improved the quality of drenching the sand.

Drawings

FIG. 1 is a schematic view of the structure of an apparatus used in the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a schematic view of the fitting relationship between the rotor and the mounting bracket according to the present invention;

FIG. 4 is another schematic structural view of the present invention;

FIG. 5 is a schematic view of the positional relationship of the slurry barrel and the spray head assembly of the present invention;

FIG. 6 is a left side schematic view of the transfer mechanism of the present invention;

FIG. 7 is a right side schematic view of the transfer mechanism of the present invention;

FIG. 8 is a schematic diagram of a matching relationship between a swing rod, a sand pouring steering engine and an electric chuck;

FIG. 9 is a schematic structural view of a support, an extension seat and a base of the sand sprinkling mechanism of the present invention;

FIG. 10 is a cross-sectional view of the spiral roller and screen cylinder assembly of the present invention;

fig. 11 is a sectional view of a first stationary tub of the present invention.

In the figure: the device comprises a conveyor belt 1, a mounting frame 2, a circular hole 21, a rotating head 22, a torsion spring 23, a sand pouring mechanism 3, a sand pouring mechanism support 31, an extension seat 32, a swing cylinder 33, a swing rod 34, a sand pouring steering engine 35, an electric chuck 36, a screen drum 37, a first fixed drum 38, a bearing 39, a sand pouring motor 310, a sand pouring funnel 311, a vibrating screen 312, a receiving drum 313, a base 314, a notch 315, a spiral roller 316, a second fixed drum 317, a mortar coating mechanism 4, a mortar coating drum 41, a baffle plate 42, an annular track 43, a belt 44, a mortar coating motor 45, a nozzle assembly 46, a pulley 47, an opening 48, a transmission mechanism 5, a top seat 51, a mortar coating first transmission track 52, a sand pouring second transmission track 53, a first steering engine 54, a first electric claw 55, a mortar coating second transmission track 56, a sand pouring first transmission track 57, a first air cylinder 58, a second electric claw 59, a fourth electric steering engine 511, a fourth claw 511, Third electric claw 512, second cylinder 513, third steering gear 514, second steering gear 515, wax matrix 6, mould pole 7.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description below:

as shown in figures 1-11, the investment pattern equipment for plough making comprises a conveyor belt 1, a mounting rack 2 is detachably mounted on the conveyor belt 1, two rows of the mounting rack 2 are respectively arranged on the conveyor belt 1 in a bilateral symmetry manner, one end of the mounting rack 2 and the conveyor belt 1 are mutually fixed through a bolt, the other end of the mounting rack 2 exceeds the conveyor belt 1 and is hinged with two rotary heads 22 at the end parts thereof, a torsion spring 23 for resetting the rotary heads 22 is arranged between the rotary heads 22 and a fixing rack 21, the two rotary heads 22 are far away from the mounting rack 2 and mutually attached to enable a round hole 21 to be formed between the rotary heads 22 and the mounting rack 2, a wax pattern 6 is arranged in the mounting rack 2, a mold rod 7 is arranged in the wax pattern 6, a disc-shaped positioning block is arranged at the upper end of the mold rod 7 after passing through the wax pattern 6, the area of the positioning block is larger than that, the rotary heads 22 can rotate inwards or outwards relative to the mounting rack 2, so that the mold rod 7 can pass through a gap between the two rotary heads 22 to move out of or into the mounting rack 2 when pulled, the left side and the right side of the conveyor belt 1 are respectively provided with the slurry coating mechanism 4 and the sand sprinkling mechanism 3, and the transmission mechanism 5 is arranged above the conveyor belt 1; after the wax mold 6 is manufactured on the mold rod 7, the mold rod 7 is clamped into the mounting frame 2 on the left side of the conveyor belt 1 and is conveyed to the position of the first slurry coating conveying track 52 through the conveyor belt 1, and the height of the mold rod 7 is the initial height at the moment;

the transmission mechanism 5 comprises a top seat 51 arranged above the conveyor belt 1, the top seat 51 is of a Z-shaped structure, a first mortar coating conveying rail 52 and a second sand spraying conveying rail 53 are arranged on the horizontal section of the lower portion of the top seat 51, a second mortar coating conveying rail 56 and a first sand spraying conveying rail 57 are arranged on the horizontal section of the upper portion of the top seat 51, the first mortar coating conveying rail 52 and the second mortar coating conveying rail 56 are arranged between the conveyor belt 1 and the mortar coating mechanism 4, a first steering engine 54 is arranged below the first mortar coating conveying rail 52, a first electric claw 55 is fixed on the rotating shaft of the first steering engine 54, a first air cylinder 58 is connected on the second mortar coating conveying rail 56 in a sliding manner, a push rod of the first air cylinder 58 penetrates through the second mortar coating conveying rail 56 and then is connected with a second steering engine 515, a second electric claw 59 is connected on the rotating shaft of the second steering engine 515, the first electric claw 55 rotates under the driving of the first steering engine 54 and grabs the mold rod 7, the wax pattern is conveyed to a slurry coating barrel 41 leftwards, a spray head assembly 46 of a slurry coating mechanism 4 is used for spraying a wax pattern 6, a first steering engine 54 drives a pattern rod 7 to rotate, so that slurry is uniformly coated on the wax pattern 6, after the slurry coating is finished, the first steering engine 54 rotates to transmit the wax pattern 6 to a second electric jaw 59, the second electric jaw 59 is driven by a first air cylinder 58 to move downwards after grabbing the pattern rod 7, the first electric jaw 55 is separated from the pattern rod 7, the first steering engine 54 drives the first electric jaw 55 to reset to a position of a conveyor belt 1 for next round of operation, the second steering engine 515 drives the second electric jaw 59 to rotate 180 degrees, the first air cylinder 58 drives the second electric jaw 59 to move upwards, and the lower end position of the pattern rod 7 is higher than the conveyor belt 1;

the coating mechanism 4 comprises a coating barrel 41, a spraying device is arranged on the front side of the coating barrel 41, the spraying device comprises a spray head assembly 46, a pulley 47 matched with the annular rail 43 is arranged on the lower portion of the spray head assembly 46, a coating motor 45 is fixed on the side wall of the coating barrel 41, the annular rail 43 is arranged below the coating barrel 41, a plurality of protrusions in smooth transition are arranged on the annular rail 43, the spray head assembly 46 can move up and down relative to the coating barrel 41 to fully spray the wax mold 6, the coating motor 45 is mutually driven by a rotating shaft of the annular rail 43 through a belt 44, a first steering engine 54 drives the wax mold 6 to rotate in the coating barrel 41, an opening 48 is arranged on the right side of the coating barrel 41, a baffle 42 is arranged on the right side of the coating barrel 41, the left side of the baffle 42 slightly inclines downwards and coincides with the bottom of the opening 48, the baffle 42 is positioned right below a top seat 51, and is convenient for collecting paint dropped from the wax mold 6, reducing the influence on the conveyor belt 1;

the sand pouring second conveying track 53 and the sand pouring first conveying track 57 are arranged between the conveyor belt 1 and the sand pouring mechanism 3, a fourth steering engine 511 is connected below the sand pouring second conveying track 53 in a sliding manner, a rotating shaft of the fourth steering engine 511 is connected with a fourth electric clamping jaw 510, a second air cylinder 513 is connected on the sand pouring first conveying track 57 in a sliding manner, a push rod of the second air cylinder 513 penetrates through the sand pouring first conveying track 57 and then is connected with a third steering engine 514, and a rotating shaft of the third steering engine 514 is connected with a third electric clamping jaw 512; when the second electric claw 59 transmits the wax pattern 6 to the upper part of the conveyor belt 1, the third electric claw 512 positioned below the sand spraying first conveying rail 57 on the right side of the mortar coating second conveying rail 56 grabs the wax pattern 6, the second electric claw 59 is separated from the wax pattern 6 and then is reset to the left side of the mortar coating second conveying rail 56, the third steering engine 514 above the third electric claw 512 drives the wax pattern 6 to rotate 180 degrees, the wax pattern 6 is conveyed to the sand spraying mechanism 3 on the right side of the conveyor belt 1 for sand spraying, and the second air cylinder 513 above the third electric claw 512 drives the wax pattern 6 to move downwards to the initial height;

the sand sprinkling mechanism 3 comprises a sand sprinkling mechanism support 31, a swing cylinder 33 is hinged to the upper portion of the sand sprinkling mechanism support 31, a swing rod 34 is hinged to a push rod of the swing cylinder 33, the middle of the swing rod 34 is rotatably connected with the sand sprinkling mechanism support 31, a sand sprinkling steering engine 35 is arranged at one end, away from the swing cylinder 33, of the swing rod 34, and an electric chuck 36 is connected to a rotating shaft of the sand sprinkling steering engine 35;

after the electric chuck 36 grabs the mold rod 7, a push rod of the swing cylinder 33 extends to enable the swing rod 34 to rotate anticlockwise to be horizontal, the sand spraying steering engine 35 drives the electric chuck 36 to rotate, and the shakeout mechanism shakeout; after the shakeout is finished, the sand pouring steering engine 35 is closed, the push rod of the swing cylinder 33 retracts, so that the mold rod 7 is reset to be in a vertical state, and the third electric clamping jaw 512 is used for grabbing the mold rod 7 and then rotates for 90 degrees to rotate the mold rod 7 to the front;

an extension seat 32 extending forwards is arranged on the front side of a sand spraying mechanism support 31, a receiving barrel 313 is arranged on the right side of the sand spraying mechanism support 31, a notch 315 for a wax mould 6 to pass through is arranged on the left side of the receiving barrel 313, a base 314 is arranged on the upper portion of the right side of the receiving barrel 313, a screen barrel 37 is rotatably connected between the base 314 and the extension seat 32, the screen barrel 37 corresponds to the receiving barrel 313, a spiral roller 316 is connected at the rotating shaft of a sand spraying motor 310, a spiral groove of the spiral roller 316 and the screen barrel 37 rotate relatively, a first fixed barrel 38 is arranged between the screen barrel 37 and the extension seat 32, the first fixed barrel 38 and the extension seat 32 are relatively fixed, a bearing 39 is arranged between the spiral roller 316 and the extension seat 32, a channel for discharging sand is arranged on the barrel wall of the first fixed barrel 38, a second fixed barrel 317 is fixed on the base 314, the first fixed barrel 38, the second fixed barrel 317 and the screen barrel 37 are relatively fixed, a sand spraying funnel 311 for feeding sand is arranged above the fixed barrel 317, drench sand funnel 311 department and be equipped with shale shaker 312, the sand material is more even through shale shaker 312 and the secondary filter back granule of a sieve section of thick bamboo 37 for drench the quality improvement of sand, improved the firing quality when follow-up firing.

The fourth electric claw 510 grabs the mold rod 7, after the third electric claw 512 is separated from the mold rod 7, the second cylinder 513 drives the third electric claw 512 to move upwards, the third steering engine 514 drives the third electric claw 512 to reset, the sand spraying second conveying track 53 drives the fourth steering engine 511 to return to the conveying belt 1 along conveying, the mold rod 7 is clamped into the mounting frame 2 on the right side of the conveying belt 1, and the conveying belt 1 drives the mold rod 7 to enter the next process.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims

1. An investment casting process, which is characterized in that: the method comprises the following steps:

s1: after a wax mold (6) is manufactured on a mold rod (7), the mold rod (7) is clamped into a mounting rack (2) on the left side of a conveyor belt (1) and is conveyed to a first slurry coating conveying track (52) of a conveying mechanism (5) through the conveyor belt (1);

s2, after the first steering engine (54) is transmitted to the mounting frame (2) on the left side by the first conveying track (52), the first electric claw (55) grabs the mold rod (7) and transmits the mold rod to a slurry coating barrel (41) of the slurry coating mechanism (4) through the first conveying track (52);

s3, spraying a wax mold (6) by a spray head assembly (46) of the slurry coating mechanism (4), and driving a mold rod (7) to rotate by a first steering engine (54) so that slurry is uniformly coated on the wax mold (6);

s4, a first steering engine (54) rotates the wax mould (6) after spraying to a second slurry coating conveying track (56), a second electric claw (59) grabs a mould rod (7), the first electric claw (55) is separated from the wax mould (6), a first air cylinder (58) drives the second electric claw (59) to move downwards, so that the first electric claw (55) is separated from the mould rod (7), the first steering engine (54) drives the first electric claw (55) to reset to the position of a conveyor belt (1) for next round of operation, the second steering engine (515) drives the second electric claw (59) to rotate 180 degrees, the first air cylinder (58) drives the second electric claw (59) to move upwards, and the position of the lower end of the mould rod (7) is higher than the conveyor belt (1);

s5: the wax mold (6) is transmitted to the upper side of the conveyor belt (1) by the second electric clamping jaw (59), the third electric clamping jaw (512) grabs the wax mold (6), the second electric clamping jaw (59) is separated from the wax mold (6) and then is reset to the left side of the second slurry coating conveying track (56), the third steering engine (514) drives the wax mold (6) to rotate 180 degrees, the wax mold (6) is conveyed to the sand coating mechanism (3), and the second cylinder (513) above the third electric clamping jaw (512) drives the wax mold (6) to move downwards;

s6: after the electric chuck (36) grabs the mold rod (7), a push rod of the swing cylinder (33) extends to enable the swing rod (34) to rotate anticlockwise to be horizontal, the sand spraying steering engine (35) drives the electric chuck (36) to rotate, and the sand shakeout mechanism shakeout; after the wax mold (6) is uniformly covered with sand, the sand pouring steering engine (35) is closed, the push rod of the swing cylinder (33) retracts, so that the mold rod (7) is reset to a vertical state, and the third electric clamping jaw (512) grabs the mold rod (7) and then rotates for 90 degrees to rotate the mold rod (7) to the front;

s7: fourth electric jack catch (510) snatchs modular jack (7), behind third electric jack catch (512) and modular jack (7) phase separation, second cylinder (513) drive third electric jack catch (512) up motion, third steering wheel (514) drive third electric jack catch (512) reset, drench sand second delivery track (53) drive fourth steering wheel (511) along carrying back conveying belt (1) department, go into in mounting bracket (2) on conveyer belt (1) right side with modular jack (7), conveyer belt (1) drive modular jack (7) get into next process.

2. An investment casting process according to claim 1 wherein: the one end of mounting bracket (2) passes through the bolt fastening with conveyer belt (1), the other end of mounting bracket (2) articulates there are two turns (22), be equipped with between turn (22) and mount (21) and be used for turning torsional spring (23) that (22) reset, two turn (22) keep away from mounting bracket (2) and laminate each other and make and constitute a round hole (21) between turn (22) and mounting bracket (2).

3. An investment casting process according to claim 1 wherein: the coating mechanism (4) comprises a coating barrel (41), and the spraying device is positioned on the front side of the coating barrel (41); a paste coating motor (45) is fixed on the side wall of the paste coating barrel (41), an annular rail (43) is arranged below the paste coating barrel (41), a plurality of smoothly-transitional bulges are arranged on the annular rail (43), and the paste coating motor (45) is mutually driven by a rotating shaft of the annular rail (43) through a belt (44); the spraying device comprises a spray head assembly (46), the spray head assembly (46) can move up and down relative to the slurry coating barrel (41), and a pulley (47) matched with the annular rail (43) is arranged at the lower part of the spray head assembly (46).

4. An investment casting process according to claim 1 wherein: drench sand mechanism (3) including drenching sand mechanism support (31), it articulates on the upper portion of drenching sand mechanism support (31) has swing cylinder (33), the push rod department of swing cylinder (33) articulates there is pendulum rod (34), the middle part of pendulum rod (34) with drench sand mechanism support (31) and rotate and be connected, the one end that swing cylinder (33) were kept away from in pendulum rod (34) is equipped with drenches sand steering wheel (35), the pivot department of drenching sand steering wheel (35) is connected with electric chuck (36), the right side of drenching sand mechanism support (31) is equipped with shakeout mechanism.

5. An investment casting process according to claim 4, wherein: the shakeout mechanism comprises an extension seat (32) arranged on the front side of a sand sprinkling mechanism support seat (31), a base (314) is arranged on the upper portion of the right side of the receiving barrel (313), a screen drum (37) is rotatably connected between the base (314) and the extension seat (32), the screen drum (37) corresponds to the receiving barrel (313), the screen drum (37) is driven by a sand sprinkling motor (310), and the receiving barrel (313) is arranged on the right side of the sand sprinkling mechanism support seat (31);

drench pivot department of sand motor (310) and be connected with spiral roller (316), the helicla flute and the sieve section of thick bamboo (37) relative rotation of spiral roller (316), sieve section of thick bamboo (37) and extend and be equipped with first fixed bucket (38) between seat (32), first fixed bucket (38) with extend seat (32) relatively fixed, spiral roller (316) and extend and be equipped with bearing (39) between seat (32), be equipped with on the bucket wall of first fixed bucket (38) and be used for sand material exhaust passageway, be fixed with the fixed section of thick bamboo of second (317) on base (314), the fixed section of thick bamboo of first fixed bucket (38), the fixed section of thick bamboo of second (317) and sieve section of thick bamboo (37) relatively fixed, the top of fixed section of thick bamboo (317) is equipped with and is used for into the sand material drench sand funnel (311).

6. An investment casting process according to claim 1 wherein: the conveying mechanism (5) comprises a top seat (51) arranged above the conveying belt (1), the top seat (51) is of a Z-shaped structure, a first slurry coating conveying track (52) and a first sand spraying conveying track (53) are arranged on the horizontal section of the lower portion of the top seat (51), a second slurry coating conveying track (56) and a second sand spraying conveying track (57) are arranged on the horizontal section of the upper portion of the top seat (51), the first slurry coating conveying track (52) and the second slurry coating conveying track (56) are arranged between the conveying belt (1) and the slurry coating mechanism (4), the first sand spraying conveying track (53) and the second sand spraying conveying track (57) are arranged between the conveying belt (1) and the sand spraying mechanism (3), a first steering engine (54) is arranged below the first slurry coating conveying track (52), and a first electric jaw (55) is fixed at the rotating shaft of the first steering engine (54), scribble sliding connection on thick liquid second conveying track (56) and have first cylinder (58), the push rod of first cylinder (58) passes and is connected with second steering wheel (515) after scribbling thick liquid second conveying track (56), the pivot department of second steering wheel (515) is connected with second electric claw (59), the below sliding connection who drenches first conveying track of sand (53) has third steering wheel (511), the pivot department of third steering wheel (511) is connected with third electric claw (510), it has second cylinder (513) to drench sliding connection on sand second conveying track (57), the push rod of second cylinder (513) is crossed and is drenched and be connected with third steering wheel (514) behind sand second conveying track (57), the pivot department of third steering wheel (514) is connected with fourth electric claw (512).