CN113664152A

CN113664152A - Precoated sand forming equipment

Info

Publication number: CN113664152A
Application number: CN202110801771.0A
Authority: CN
Inventors: 严佳世
Original assignee: Wenling New Power Machinery Co ltd
Current assignee: Wenling New Power Machinery Co ltd
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-11-19

Abstract

The utility model relates to a tectorial membrane sand former, including pouring equipment and forming die, it includes the conveying pipe of putting sand room, melting room and deformability to pour the equipment, it sets up in the frame and is used for depositing tectorial membrane sand to put the sand room, the both ends of conveying pipe communicate respectively and put sand room and melting room, the intercommunication has the piece of pouring on the melting room, pour and seted up a plurality of conveying mouths on the piece, the melting room melts tectorial membrane sand heating and extrudes from the conveying mouth after becoming to pour the liquid, two drive melting rooms of driving piece remove and make a plurality of conveying mouths and a plurality of feed inlet intercommunication. Operating personnel deposits the tectorial membrane sand in putting the sand room, and the tectorial membrane sand gets into the melting room from the conveying pipe, and the melting room heats the tectorial membrane sand and makes the tectorial membrane sand heat and melt into and pour the liquid, then control driving piece one and driving piece two make a plurality of material conveying mouths and a plurality of feed inlet intercommunication, then will pour the liquid and extrude to the feed inlet from defeated material mouth, realized pouring the automatic of forming die, to a great extent has reduced operating personnel's activity duration.

Description

Precoated sand forming equipment

Technical Field

The application relates to the field of forming equipment, in particular to precoated sand forming equipment.

Background

The precoated sand refers to molding sand or core sand with a layer of solid resin film coated on the surface of sand grains before molding. The method is used for steel castings and iron castings. The tectorial membrane psammitolite needs to be made through sand grain and resin glue fuse to compress tightly when the shaping, in addition in order to cast the casting of different shapes, needs to form the profile cavity in tectorial membrane psammitolite inside.

As shown in fig. 1, the film-coated sand core molding device in the related art includes a frame 11, a first driving element 143, a pouring device 13, and a molding die 12, where the molding die 12 includes an upper die 121 and a lower die 122, the lower die 122 is disposed on the frame 11, the first driving element 143 drives the lower die 122 to vertically move downward to cover the top surface of the upper die 121 and form the molding die 12 with the upper die 121, a molding cavity is disposed in the molding die 12, the molding cavity includes a feed inlet 124 communicated with the outside, the pouring device 13 is a pouring gun 136, the pouring gun 136 is slidably connected to the frame 11, a liquid replenishing slot 1362 is disposed on the top surface of the pouring gun 136, a pouring head 1361 matched with the feed inlet 124 is disposed on the pouring gun 136, and the pouring head 1361 is always aligned with the feed inlet 124.

Operating personnel uses driving piece one drive to go up the mould downstream to the assembly on the lower mould, then operating personnel promotes the pouring rifle towards forming die one side and makes the head of pouring stretch into the feed inlet, then the pouring rifle pours the tectorial membrane sand into the shaping intracavity, after filling up tectorial membrane sand in the shaping intracavity and pouring the liquid, wait for to pour the liquid and solidify, then operating personnel will pour the rifle and remove to keeping away from forming die, use driving piece one drive to go up the mould upward movement to keeping away from the lower mould, then take out tectorial membrane sand finished product after the shaping.

The above-mentioned related technical solutions have the following drawbacks: the process of pouring that the handheld pouring gun of operating personnel goes on forming die needs to wait for to pour the liquid cooling, and whole process is consuming time longer, needs the untimely past fluid infusion inslot of filling simultaneously and replenishes the liquid, has also increased operating personnel's operating time.

Disclosure of Invention

In order to reduce operating time that operating personnel pour forming die, this application provides a tectorial membrane sand former.

The application provides a tectorial membrane sand former adopts following technical scheme:

a precoated sand molding device comprises a first driving piece, a frame, a pouring device and a molding die, wherein the molding die comprises an upper die and a lower die, the lower die is arranged on the frame, the first driving piece drives the upper die to be assembled on the lower die, a pouring cavity is formed in the molding die and comprises a plurality of feed inlets communicated with the outside, the molding die further comprises a second driving piece, the pouring device comprises a sand releasing chamber, a melting chamber and a deformable feed pipe, the sand releasing chamber is arranged on the frame and used for storing precoated sand, the melting chamber is connected to the frame in a sliding manner, two ends of the feed pipe are respectively communicated with the sand releasing chamber and the melting chamber, the feed pipe is used for conveying the precoated sand in the sand releasing chamber to the melting chamber, the melting chamber is communicated with a pouring block, the pouring block is provided with a plurality of feed inlets matched with the plurality of feed inlets, the melting chamber heats and melts the precoated sand into a pouring liquid and then extrudes through the feed inlets, and the second driving piece drives the melting chamber to move to a pouring block to abut against the outer wall of the forming mold, so that the plurality of material conveying ports are communicated with the plurality of material feeding ports.

By adopting the technical scheme, an operator stores precoated sand into a sand placing chamber, the precoated sand enters a melting chamber through a feeding pipe, the melting chamber heats the precoated sand to melt the precoated sand into pouring liquid, then a driving piece I is controlled to install an upper die on a lower die, a driving piece II is controlled to move a pouring block to abut against the outer wall of a forming die, a plurality of material conveying ports are communicated with a plurality of material feeding ports, and then the pouring liquid is extruded to the material feeding ports from the material conveying ports to reduce filling of a pouring cavity; tectorial membrane sand former has realized pouring forming die's automation, operating personnel only need regularly toward put the indoor tectorial membrane sand that adds of sand can, to a great extent has reduced operating time that operating personnel pour forming die.

Preferably, still include driving piece three, it has the scraper blade to pour on the lateral wall of one side that the piece is located a plurality of feed inlets sliding connection, three drive scraper blades of driving piece make a round trip to slide on pouring the piece lateral wall, the scraper blade is used for scraping the adhesion and is pouring remaining tectorial membrane sand clot on the piece lateral wall, when pouring a piece butt on the forming die outer wall, two gliding extreme positions of scraper blade are located forming die's both sides respectively.

By adopting the technical scheme, after each pouring is finished, some solidified precoated sand can remain on the side wall of the pouring block on one side of the material conveying port, and if the remained precoated sand clot is not cleaned, the pouring block cannot be well abutted against a forming mold in the next pouring process, the remained precoated sand clot can increase the distance between the pouring block and the forming mold, so that pouring liquid cannot well enter the material conveying port from the material conveying port, the pouring liquid leaks from the material conveying port, and the pouring liquid is wasted; and the residual precoated sand clot is scraped off by using the scraper, so that the pouring liquid can enter the feed inlet from the feed delivery port more smoothly.

Preferably, the driving member three comprises a spring, a positioning ejector rod, a driving wheel, a first bevel gear, a second bevel gear, a first rotating rod, a second rotating rod and a connecting rod, a chute is formed in one side surface of the casting block facing the forming die, the positioning ejector rod is always connected to the chute in a sliding manner along a direction parallel to the sliding direction of the melting chamber on the frame, two ends of the spring are respectively arranged on the bottom wall of the chute and the positioning ejector rod, a tooth surface is formed on one side wall of the positioning ejector rod, the driving wheel, the first bevel gear, the second bevel gear, the first rotating rod and the second rotating rod are all rotatably connected to the casting block, the driving wheel and the first bevel gear are coaxially arranged on the first rotating rod, the second bevel gear is coaxially arranged on the second rotating rod, the driving wheel is connected to the tooth surface in a meshing manner, the first bevel gear is connected to the second bevel gear in a meshing manner, the connecting rod is in threaded connection with the second rotating rod, the connecting rod is arranged on the scraper plate, the connecting rod is connected to the pouring block in a sliding mode along the length direction parallel to the second rotating rod, and the length direction of the second rotating rod is parallel to the sliding direction of the scraper plate;

the bottom of the lower die is provided with a base, the lower die is arranged on the rack through the base, when the pouring block abuts against the outer wall of the forming die, the positioning ejector rod abuts against the base and slides relative to the sliding groove, and the scraper blade moves to the other limit position from one limit position.

Through adopting above-mentioned technical scheme, pour the piece and remove to the in-process of butt on forming die, location ejector pin can the butt on the base and along with the removal of pouring the piece, produce relative slip with the spout, the slip of location ejector pin can drive the action wheel and rotate, the action wheel rotates and drives the first bevel gear with first bull stick coaxial coupling and rotate, first bevel gear rotates and drives second bevel gear and rotate, second bevel gear rotates and drives the second bull stick and rotate, the second bull stick rotates and drives the connecting rod of threaded connection on the second bull stick again and slide on pouring the piece, the connecting rod slides and drives the scraper blade and slide along pouring a lateral wall, thereby realize the scraper blade to the scraping of pouring the piece.

Preferably, a clamping block is arranged on one end face, facing the forming die, of the positioning ejector rod, a clamping groove matched with the clamping block in a clamped mode is formed in one side face, facing the positioning ejector rod, of the base, and when the pouring block moves to abut against the outer wall of the forming die, the clamping block is clamped on the clamping groove.

By adopting the technical scheme, the fixture block and the clamping groove play a role in positioning; meanwhile, when the pouring block moves towards one side far away from the forming mold, the acting force of the clamping block and the clamping groove in clamping connection with each other and the elasticity of the spring enable the positioning ejector rod to keep still with the base within a period of time, and the positioning ejector rod can slide relative to the sliding groove along with the moving process of the pouring block, so that a newly formed film-coated sand block on the pouring block is scraped by the scraper, and the film-coated sand block adhered to the pouring block is processed in time.

Preferably, the scraper comprises a main body and two blades for scraping the precoated sand blocks, and the two blades are respectively arranged on two sides of the main body parallel to the moving direction of the scraper.

Through adopting above-mentioned technical scheme, at scraper blade round trip movement's in-process, two blades homoenergetic are wiped away and are wiped away pouring a side, can make pouring a side more clean by wiping away.

Preferably, the scraper blade also comprises two cutting parts, the two cutting parts are respectively arranged on the side surfaces of the two blades far away from the pouring block, and before the blades scrape the surface of the pouring block, the cutting parts cut the precoated sand-clot block.

Through adopting above-mentioned technical scheme, at the in-process that the scraper blade was wiped away, the cutting portion first contacts tectorial membrane sand clot and cuts tectorial membrane sand clot, then the blade is wiped away pouring a side again, especially to the higher tectorial membrane sand clot of some hardness, can conveniently strike off tectorial membrane sand clot.

Preferably, two arc-shaped surfaces are arranged on the side face, away from the pouring block, of the main body, the two arc-shaped surfaces are respectively located at two ends, close to the two blades, of the main body, and the distance from one end, away from the close blades, of each arc-shaped surface to the side face, away from the corresponding blade, of one end, away from the corresponding blade, of each arc-shaped surface gradually decreases.

By adopting the technical scheme, the precoated sand clot after the blade is scraped conveniently slides down under the guiding action of the arc-shaped surface.

Preferably, the second driving part is a first air cylinder, the first air cylinder is arranged on the rack, the melting chamber is arranged on a piston rod of the first air cylinder, and the length direction of the piston rod of the first air cylinder is parallel to the sliding direction of the melting chamber on the rack.

Through adopting above-mentioned technical scheme, the flexible drive melting chamber that can be convenient of piston rod through first cylinder removes.

In summary, the present application includes at least one of the following beneficial technical effects:

1. by arranging the fixture block and the clamping groove, when the pouring block moves towards one side far away from the forming die, the acting force of the clamping connection of the fixture block and the clamping groove and the elasticity of the spring enable the positioning ejector rod to keep still with the base within a period of time, and the positioning ejector rod can slide relative to the sliding groove in the moving process of the pouring block, so that a newly formed precoated sand block on the pouring block is scraped off by the scraper, and the precoated sand block adhered on the pouring block is processed in time;

2. by arranging the two blades, in the process of moving the scraper back and forth, the two blades can scrape the side surface of the pouring block, so that the side surface of the pouring block can be scraped more cleanly;

3. by arranging the arc-shaped surface on the scraper, the precoated sand blocks scraped by the blade can conveniently slide down under the guiding action of the arc-shaped surface.

Drawings

Fig. 1 is an overall structural diagram of the related art.

Fig. 2 is a schematic overall structure diagram of an embodiment of the present application.

Fig. 3 is a schematic structural diagram of a forming mold and a pouring device according to an embodiment of the present application.

FIG. 4 is a schematic structural diagram of a driving member III and a scraper of an embodiment of the present application.

FIG. 5 is a schematic view of a squeegee according to an embodiment of the present application.

Description of reference numerals: 11. a frame; 111. a platform base; 112. a support; 12. forming a mold; 121. an upper die; 122. a lower die; 123. pouring a groove; 124. a feed inlet; 13. pouring equipment; 131. a sand discharging chamber; 1311. a chamber; 1312. an opening; 1313. a cover plate; 132. a feed pipe; 133. a melting chamber; 134. pouring blocks; 1341. a first block; 1342. a first plate; 1343. a chute; 1344. a material conveying port; 136. pouring a gun; 1361. pouring a head; 1362. a liquid supplementing groove; 14. a vertical rod; 141. a slide plate; 142. a top seat; 143. a first driving part; 1431. a second cylinder; 144. a base; 1441. a card slot; 145. accommodating grooves; 15. a driving part II; 151. a first cylinder; 152. a slide plate; 153. a fixed block; 16. a driving member III; 161. a driving wheel; 162. a first rotating lever; 163. a first bevel gear; 164. a second bevel gear; 165. a second rotating rod; 166. a connecting rod; 167. positioning the ejector rod; 1671. a clamping block; 17. a squeegee; 171. a main body; 1711. an arc-shaped surface; 172. a blade; 173. a cutting section; 1731. and cutting the slices.

Detailed Description

The present application is described in further detail below with reference to figures 2-5.

The embodiment of the application discloses tectorial membrane sand former.

Referring to fig. 2, the precoated sand molding apparatus of the present embodiment includes a frame, a molding die, and a pouring apparatus. The frame includes platform seat and four supports, and vertical fixed connection is on the four corners of platform seat top surface respectively in four support bottoms.

Referring to fig. 2, four montants of vertical fixedly connected with on the platform seat, the both ends difference fixed connection of montant have the slide plate along vertical direction sliding connection on the montant on putting sand room bottom surface and platform seat top surface, and the slide plate is the level setting, and four montants pass the four corners of slide plate respectively. The projection of the sliding plate on the platform base is positioned at the center of the platform base. The center of the bottom surface of the sliding plate is fixedly connected with a top seat, and the top surface of the platform seat is opposite to the position of the top seat and is fixedly connected with a base.

Referring to fig. 2 and 3, forming die includes mould and lower mould, and it pours the groove all to have seted up two on last mould bottom surface and the lower mould top surface, when last mould and lower mould assembly together, four are pour the groove and are formed two and pour the chamber, and every is pour the chamber and all includes a plurality of feed inlets with external intercommunication, and a plurality of feed inlets that belong to same chamber of pouring lie in forming die with external intercommunication department with one side outer wall, and two feed inlets of pouring the chamber lie in forming die's both sides lateral wall respectively with external intercommunication department.

Referring to fig. 2 and 3, the top surface of the upper die is fixedly connected to the bottom surface of the top seat, and the bottom surface of the lower die is fixedly connected to the top surface of the base. The upper die and the lower die are arranged opposite to each other. The sliding plate is provided with a first driving part, and the first driving part drives the sliding plate to be connected to the vertical rod in a sliding mode. The first driving part is a second cylinder, the second cylinder is fixedly connected to the center of the top surface of the sliding plate, and a piston rod of the second cylinder vertically extends upwards and is fixedly connected to the bottom surface of the sand placing chamber.

When the piston rod of the second cylinder extends out, the second cylinder is ejected downwards under the reaction of the piston rod of the second cylinder, and the second cylinder drives the upper die to move downwards through the sliding plate to be assembled on the lower die.

Referring to fig. 2, the pouring equipment comprises a sand discharging chamber, two deformable feeding pipes and two melting chambers with inner cavities, the sand discharging chamber is fixedly connected to four supports, and the top ends of the four supports are respectively and fixedly connected to four corners of the bottom surface of the sand discharging chamber. The inside cavity that is used for depositing the tectorial membrane sand of offering of sand release room, the opening that communicates with the cavity is seted up to sand release room top, and operating personnel pours tectorial membrane sand to the cavity into toward the opening part in, and sand release room is located articulated on the open-ended one side lateral wall and has the apron, and when the apron rotated to the butt when sand release room top, the apron sheltered from the opening.

Referring to fig. 2 and 3, the two melting chambers are connected to the top surface of the platform base in a sliding mode along the length direction of the platform base, a second driving piece is arranged on the platform base and comprises two first air cylinders, the two ends of the length direction of the top surface of the platform base are fixedly connected with fixing blocks respectively, and the two first air cylinders are fixedly connected to the side face, far away from the two fixing blocks, of one side respectively. The piston rod of first cylinder stretches out fixed block and fixedly connected with slide along the length direction that is on a parallel with the platform seat, and two melting rooms are fixed connection respectively on the top surface of two slides, and two melting rooms are just to setting up each other. The melting chamber is the tube-shape setting, and two conveying pipes and two melting chambers are one-to-one, and the one end of conveying pipe stretches into sand box and cavity communicating pipe from sand box bottom surface, and the other end of conveying pipe stretches into and communicates with the inner chamber of melting chamber from corresponding melting chamber top surface. The precoated sand in the sand placing chamber flows to the inner cavity through the feeding pipe, and the melting chamber is used for heating and melting the precoated sand in the inner cavity into precoated sand pouring liquid.

Referring to fig. 2 and 3, the outer walls of the two melting chambers opposite to each other are fixedly connected with pouring blocks, and the two pouring blocks are respectively positioned on two sides of the forming mold. The pouring block comprises a first block and a first plate, the first block is fixedly connected to the outer walls, opposite to each other, of the two melting chambers, and one side face of the first plate is fixedly connected to one side face, opposite to each other, of the two first blocks. Offer a plurality of material conveying mouths that match with a plurality of feed inlets on the first piece and the first board, the both ends of material conveying mouth communicate with inner chamber and external world respectively, the tip of material conveying mouth and external world intercommunication is located the first board and keeps away from one side of first piece.

Referring to fig. 2 and 3, the feeding ports of the two pouring cavities on the forming mold are respectively opposite to the feeding ports on the two first plates. The lateral surfaces of the two sides of the top seat and the outer wall of the base, which face the two first plates, are flush with the lateral walls of the two sides of the feed inlet of the forming die.

When the piston rod of first cylinder stretched out, the piston rod of first cylinder drove the sliding plate and slides towards forming die one side, and forming die drives the first board through melting room and first piece and removes to the butt on forming die's outer wall, and a plurality of material conveying mouths on the first board communicate with a plurality of feed inlets respectively this moment, and the pouring liquid after the melting room melts will pour the chamber and fill up in squeezing into the feed inlet from the material conveying mouth again.

Referring to fig. 3 and 4, the first plate is located and has the scraper blade along vertical direction sliding connection on the lateral wall of one side of a plurality of feed inlets, pours and is equipped with driving piece three on the piece, and three drive scraper blades of driving piece make a round trip to slide on the lateral wall of first plate, pours at every turn and accomplishes the back, pours the piece and can remain some tectorial membrane sand after solidifying on being located the lateral wall of one side of material conveying mouth, and the scraper blade is used for striking off the adhesion and pours remaining tectorial membrane sand clot on the piece lateral wall. Two gliding extreme positions of scraper blade are located forming die's upper and lower both sides respectively, all set up the holding tank that supplies the scraper blade to slide to the holding of extreme position on footstock and the base.

Referring to fig. 3 and 4, the third driving part comprises a spring, a positioning ejector rod, a driving wheel, a first bevel gear, a second bevel gear, a first rotating rod, a second rotating rod and a connecting rod, a sliding groove is formed in the side face of one side of the first plate facing the forming die, the length direction of the sliding groove is parallel to the length direction of the first cylinder piston rod, and the bottom wall of the sliding groove extends to the first block. The location ejector pin is along the length direction sliding connection of spout on the spout, and the both ends of spring set up respectively on the spout diapire and the location ejector pin. In order to prevent the positioning ejector rod from sliding out of the first plate, a limiting block is fixedly connected to the side wall of the positioning ejector rod, a limiting groove matched with the limiting block is formed in the side wall of the sliding groove, and the limiting block is connected to the limiting groove in a sliding mode in parallel to the sliding direction of the positioning ejector rod.

Referring to fig. 3 and 4, the driving wheel, the first bevel gear, the second bevel gear, the first rotating rod and the second rotating rod are rotatably connected to the pouring block, the driving wheel and the first bevel gear are coaxially fixed at two ends of the first rotating rod respectively, tooth surfaces are formed in the top surface of the positioning ejector rod along the length direction of the positioning ejector rod, the driving wheel is located right above the positioning ejector rod, and the driving wheel is connected with the tooth surfaces in a meshed mode. The second bevel gear is coaxially arranged at the bottom end of the second rotating rod and is connected to the first bevel gear in a meshing manner. The length direction of second bull stick is vertical direction setting, and the one end threaded connection of connecting rod is on the second bull stick, and the other end of connecting rod stretches out first board and fixed connection on the scraper blade towards one side of first board. The connecting rod is connected on the first plate in a sliding mode along the vertical direction.

The pouring block moves to the butt joint in the process of being placed on the forming die, the positioning ejector rod can be abutted to the base and moves along with the pouring block, relative sliding is generated between the positioning ejector rod and the sliding groove, the positioning ejector rod slides to drive the driving wheel to rotate, the driving wheel rotates to drive the first bevel gear connected with the first rotating rod in a coaxial mode to rotate, the first bevel gear rotates to drive the second bevel gear to rotate, the second rotating rod rotates to drive the second rotating rod to rotate, the second rotating rod rotates to drive the connecting rod connected with the second rotating rod in a threaded mode to slide on the pouring block, the connecting rod slides to drive the scraper to slide along the side wall of the pouring block, the scraper is tightly attached to the side wall of the pouring block in the scraping process, and accordingly the precoated sand block adhered to the conveying port is scraped.

Referring to fig. 3 and 4, one end of the positioning ejector rod extending out of the first plates is fixedly connected with a clamping block, clamping grooves matched with the clamping block in a clamping mode are respectively formed in the side faces, facing the two first plates, of the base, and the two clamping blocks are respectively arranged over against the two clamping grooves. When the piston rod of first cylinder stretched out, two first boards removed to the butt when forming die was last, and two first boards also butt simultaneously on the both sides outer wall of base and footstock, and the location ejector pin removed to the butt on the spout diapire this moment, and the fixture block is also the joint in the draw-in groove. During the process that the positioning ejector rod is abutted on the base and slides relative to the sliding groove, the scraper blade moves from one limit position to the other limit position.

The two limit positions are respectively an upper limit position and a lower limit position, the position of the scraper sliding to the uppermost position is called the upper limit position, and the position of the scraper sliding to the lowermost position is called the lower limit position.

When the piston rod of first cylinder contracts, the piston rod of first cylinder drives first board and moves towards one side of keeping away from forming die, the ejector pin of fixing a position still can the butt on the base under the effect of spring and the cooperation of fixture block and draw-in groove this moment, move to the stopper butt in the spout until the ejector pin of fixing a position and move on one side lateral wall of spacing groove towards the base, at this moment first board continues to move towards one side of keeping away from forming die, first board application of force drives the stopper and moves towards one side of keeping away from forming die on the stopper, the stopper drives the ejector pin of fixing a position and moves towards one side of keeping away from forming die, finally make the fixture block keep away from the draw-in groove. In the process that the positioning ejector rod and the sliding groove slide relatively, the positioning ejector rod drives the driving wheel to rotate, so that the scraper moves from one limit position to the other limit position. Therefore, the first plate can be wiped by the scraper before and after pouring.

Referring to fig. 2 and 3, the plurality of feed inlets located on the same side wall of the forming mold are linearly distributed, the linear direction formed by the plurality of feed inlets is parallel to the width direction of the platform base, and the length direction of the first plate is parallel to the width direction of the platform base.

Referring to fig. 4 and 5, the scraper includes a main body, two cutting portions and two blades for scraping coated sand clots, a length direction of the main body is parallel to a length direction of the first plate, the two blades are fixedly connected to two sides of the main body parallel to a width direction, respectively, the length direction of the blades is parallel to the length direction of the main body, and the length of the blades is equal to the length of the main body. Two cutting portions set up respectively on two blades keep away from one side of pouring the piece, before the blade is wiped away the piece surface of pouring, the cutting portion cuts tectorial membrane sand clot earlier.

Referring to fig. 4 and 5, two arc-shaped surfaces are arranged on the side surface of the main body away from the first plate, the two arc-shaped surfaces are respectively arranged at two ends of the main body in the width direction, and the distance from one end of the arc-shaped surface away from the similar blade to the first plate is gradually reduced.

Referring to fig. 4 and 5, two cutting portions correspond to two blades one to one, the cutting portion includes a plurality of cutting pieces, the length direction evenly distributed of blade is followed to a plurality of cutting pieces, the one end fixed connection of cutting piece is on the one side that the first board was kept away from to the blade, the other end of cutting piece is located the one side that the main part was kept away from to the blade, the cutting piece is kept away from the first end of main part and is laminated mutually with the first board outer wall, is used for cutting the tectorial membrane sand clot piece on the first board.

In the process of scraping the precoated sand clot adhered to the first plate by the scraper, the cutting part firstly contacts the precoated sand clot and cuts the precoated sand clot, and then the blade scrapes the surface of the first plate, so that the precoated sand clot adhered to the first plate can be better scraped. Meanwhile, the two arc-shaped surfaces can facilitate the coated sand-clot blocks scraped by the blade to slide down under the guiding action of the arc-shaped surfaces.

The implementation principle of precoated sand molding equipment in the embodiment of the application is as follows: an operator drives the piston rods of the second cylinders to extend to enable the upper die to be assembled on the lower die, then the piston rods of the two second cylinders are driven to extend to enable the two first plates to move to be abutted against the forming die, the scraper blade scrapes the surfaces of the first plates once in the process of moving to be abutted against the forming die, and then pouring liquid after a melting chamber is melted is squeezed into the feeding hole from the material conveying opening and then the pouring cavity is filled.

After waiting for the pouring liquid to condense, the piston rod of two first cylinders of drive contracts, makes two first boards remove to keeping away from forming die, and at the in-process that the first board removed, the scraper blade once more scrapes the first board surface once more, then the output shaft shrink of drive second cylinder makes and goes up the mould and remove to keeping away from the lower mould, then operating personnel takes out the product after the shaping can.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a tectorial membrane sand former, includes driving piece (143), frame (11), pours equipment (13) and forming die (12), forming die (12) are including last mould (121) and lower mould (122), lower mould (122) set up on frame (11), mould (121) assembly is gone up in driving piece (143) drive on lower mould (122), it is formed with lower mould (122) assembly and pours the chamber to go up mould (121), pour the chamber and include a plurality of feed inlets (124) with external intercommunication, its characterized in that: the sand casting device is characterized by further comprising a second driving piece (15), the casting equipment (13) comprises a sand discharging chamber (131), a melting chamber (133) and a deformable feeding pipe (132), the sand discharging chamber (131) is arranged on the rack (11) and used for storing precoated sand, the melting chamber (133) is connected to the rack (11) in a sliding mode, two ends of the feeding pipe (132) are communicated with the sand discharging chamber (131) and the melting chamber (133) in a one-to-one correspondence mode, the feeding pipe (132) is used for conveying the precoated sand in the sand discharging chamber (131) to the melting chamber (133), the melting chamber (133) is communicated with a casting block (134), a plurality of material conveying ports (1344) matched with the plurality of material conveying ports (124) are formed in the casting block (134), the melting chamber (133) heats and melts the precoated sand into casting liquid and then extrudes the casting liquid through the material conveying ports (1344), and the second driving piece (15) drives the melting chamber (133) to move to the casting block (134) to abut against the outer wall of the molding die (12), the plurality of feed ports (1344) are communicated with the plurality of feed ports (124).

2. The precoated sand molding apparatus according to claim 1, characterized in that: the casting mold is characterized by further comprising a driving piece III (16), a scraper (17) is connected to the side wall, located on one side of the feed inlets (124), of the casting block (134) in a sliding mode, the driving piece III (16) drives the scraper (17) to slide back and forth on the side wall of the casting block (134), the scraper (17) is used for scraping the coated sand block adhered to the side wall of the casting block (134) to be remained, and when the casting block (134) abuts against the outer wall of the molding mold (12), the scraper (17) slides to be not in contact with the molding mold (12).

3. The precoated sand molding apparatus according to claim 2, characterized in that: the driving piece III (16) comprises a spring, a positioning ejector rod (167), a driving wheel (161), a first bevel gear (163), a second bevel gear (164), a first rotating rod (162), a second rotating rod (165) and a connecting rod (166), a sliding groove (1343) is formed in the side face, facing the forming die (12), of the pouring block (134), the positioning ejector rod (167) is connected to the sliding groove (1343) in a sliding mode along the sliding direction, parallel to the melting chamber (133), of the frame (11) all the time, the two ends of the spring are respectively arranged on the bottom wall of the sliding groove (1343) and the positioning ejector rod (167) in a one-to-one correspondence mode, a tooth surface is formed in the side wall of one side of the positioning ejector rod (167), and the driving wheel (161), the first bevel gear (163), the second bevel gear (164), the first rotating rod (162) and the second rotating rod (165) are all rotatably connected to the pouring block (134), the driving wheel (161) and the first bevel gear (163) are coaxially arranged on the first rotating rod (162), the second bevel gear (164) is coaxially arranged on the second rotating rod (165), the driving wheel (161) is in meshing connection with a tooth surface, the first bevel gear (163) is in meshing connection with the second bevel gear (164), the connecting rod (166) is in threaded connection with the second rotating rod (165), the connecting rod (166) is arranged on the scraper (17), the connecting rod (166) is in sliding connection with the pouring block (134) along the length direction parallel to the second rotating rod (165), and the length direction of the second rotating rod (165) is parallel to the sliding direction of the scraper (17);

the bottom of the lower die (122) is provided with a base (144), the lower die (122) is arranged on the rack (11) through the base (144), when the pouring block (134) abuts on the outer wall of the forming die (12), the positioning ejector rod (167) abuts on the base (144) and slides relative to the sliding groove (1343), and the scraper (17) is staggered with the material conveying opening (1344) through the material conveying opening (1344).

4. The precoated sand molding apparatus according to claim 3, characterized in that: be equipped with fixture block (1671) on the one end terminal surface of location ejector pin (167) orientation forming die (12), base (144) have been seted up on the side of one side of orientation ejector pin (167) and have been connected complex draw-in groove (1441) with fixture block (1671), when pouring piece (134) and remove to the butt on forming die (12) outer wall, fixture block (1671) joint is on draw-in groove (1441).

5. The precoated sand molding apparatus according to claim 2, characterized in that: the scraper (17) comprises a main body (171) and two blades (172) used for scraping the precoated sand blocks, wherein the two blades (172) are respectively arranged on two sides of the main body (171) parallel to the moving direction of the scraper (17).

6. The precoated sand molding apparatus according to claim 5, characterized in that: the scraper (17) further comprises two cutting parts (173), the two cutting parts (173) are respectively arranged on the side face, away from the pouring block (134), of the two blades (172), and before the blades (172) scrape the surface of the pouring block (134), the cutting parts (173) cut the precoated sand and clot firstly.

7. The precoated sand molding apparatus according to claim 5, characterized in that: two arc faces (1711) are arranged on the side face, far away from the pouring block (134), of the main body (171), the two arc faces (1711) are located at two ends, close to the two blades (172), of the main body (171 respectively, and the distance between one end, far away from the close blades (172), of the arc face (1711) and the side face, far away from the close blades (172), of one end, far away from the close blades (172) of the arc face (1711) and the side face, on one side of the scraping plate (17), of the pouring block (134) is gradually reduced.

8. The precoated sand molding apparatus according to claim 1, characterized in that: the second driving piece (15) is a first air cylinder (151), the first air cylinder (151) is arranged on the rack (11), the melting chamber (133) is arranged on a piston rod of the first air cylinder (151), and the length direction of the piston rod of the first air cylinder (151) is parallel to the sliding direction of the melting chamber (133) on the rack (11).