阅读说明：本技术 一种四工位垂直加砂造型机 (Four-station vertical sand adding molding machine ) 是由 王一帆 王建新 刘强 于 2020-12-22 设计创作，主要内容包括：本发明属于铸造造型设备技术领域,具体涉及一种四工位垂直加砂造型机,包括竖直设置的转轴、旋转臂、绕转轴依次设置在其外侧的砂箱压实机构、下芯与打气孔工位、合箱机构和清洁工位、设在砂箱压实机构正上方的砂仓以及砂箱翻转机构；所述旋转臂设在砂箱压实机构和砂仓之间,所述旋转臂安装在转轴上且绕转轴转动,其外侧端设有砂箱翻转机构,所述砂箱翻转机构位于砂仓与砂箱压实机构之间的区域。本发明的上砂箱和下砂箱内的型砂都是从上部填充到砂箱内,可以很好的解决其他形式造型设备遇到的型砂填充不实、较高工件冲砂有阴影而导致的造型失败的问题,尤其是对于高度越高的工件造型其优势越明显。(The invention belongs to the technical field of casting molding equipment, and particularly relates to a four-station vertical sand adding molding machine which comprises a vertically arranged rotating shaft, a rotating arm, a sand box compacting mechanism, a lower core and inflating hole station, a box closing mechanism, a cleaning station, a sand bin and a sand box turnover mechanism, wherein the sand box compacting mechanism, the lower core and inflating hole station, the box closing mechanism and the cleaning station are sequentially arranged on the outer side of the rotating shaft; the rotary arm is arranged between the sand box compacting mechanism and the sand bin, the rotary arm is mounted on the rotating shaft and rotates around the rotating shaft, a sand box turnover mechanism is arranged at the outer end of the rotary arm, and the sand box turnover mechanism is located in the area between the sand bin and the sand box compacting mechanism. The molding sand in the upper sand box and the lower sand box is filled into the sand box from the upper part, so that the problems of molding sand filling incompactness and molding failure caused by sand washing and shadow of higher workpieces in other molding equipment can be well solved, and the advantages of the molding equipment for the workpieces with higher heights are more obvious.)

1. The utility model provides a sand molding machine is added perpendicularly to quadruplex position which characterized in that: the sand box comprises a rotating shaft, a rotating arm, a sand box compacting mechanism, a core setting and inflating hole station, a box closing mechanism (16), a cleaning station, a sand bin and a sand box turnover mechanism, wherein the rotating shaft, the rotating arm and the sand box compacting mechanism are vertically arranged, the sand box compacting mechanism is sequentially arranged on the outer side of the rotating shaft, the core setting and inflating hole station is arranged on the core setting and inflating hole station, the sand bin is arranged right above the sand box; the rotating arm is arranged on the rotating shaft and rotates around the rotating shaft, and a sand box turnover mechanism is arranged at the outer end of the rotating arm and is positioned in an area between the sand bin and the sand box compacting mechanism;

the middle parts of the rotating arms are arranged on a rotating shaft, the rotating arms comprise an upper box rotating arm (12) and a lower box rotating arm (4), the upper box rotating arm (12) and the lower box rotating arm (4) are of a cross structure, one ends of the rotating arms (12) extending outwards are respectively provided with a sand box turnover mechanism, the rotating shaft comprises an upper box rotating shaft (8-1) and a lower box rotating shaft (8-2) which are arranged at intervals, the upper box rotating shaft (8-1) and the lower box rotating shaft (8-2) rotate relatively, the upper box rotating arm (12) is arranged on the upper box rotating shaft (8-1), and the lower box rotating arm (4) is arranged on the lower box rotating shaft (8-2); the sand box compacting mechanism comprises an upper box compacting mechanism (15) arranged on the outer side of an upper box rotating shaft (8-1) and a lower box compacting mechanism (1) arranged on the outer side of a lower box rotating shaft (8-2), the box closing mechanism (16) is arranged between the upper box rotating shaft (8-1) and the lower box rotating shaft (8-2), and the sand bin comprises an upper box sand bin (9) and a lower box sand bin (6);

the lower box compacting mechanism (1) comprises a first lifting device and a lower box mould (2) arranged at the top of the telescopic end of the first lifting device, and the upper box compacting mechanism (15) comprises a first lifting device and an upper box mould (14) arranged at the top of the telescopic end of the first lifting device;

the box closing mechanism (16) comprises a second lifting device and a supporting plate (19) arranged at the top of the telescopic end of the second lifting device;

the sand box turnover mechanism comprises a clamping device for fixing the sand box and a driving device for driving the clamping device to turn over, and the clamping device is rotatably arranged in a U-shaped groove of the rotating arm;

the sand silo includes lower case sand silo (6) and last case sand silo (9), lower case sand silo (6) and last case sand silo (9) bottom surface are equipped with lower case compacting plate (5) and last case compacting plate (10) respectively, all be equipped with the sand mouth of leading that is used for the molding sand to flow on lower case compacting plate (5) and last case compacting plate (10).

2. A four-station vertical sand-adding molding machine as claimed in claim 1, wherein: the first lifting device comprises a compaction oil cylinder (18), the second lifting device comprises a box closing oil cylinder (21), and the compaction oil cylinder (18) and the box closing oil cylinder (21) both adopt hydraulic oil cylinders.

3. A four-station vertical sand-adding molding machine as claimed in claim 2, wherein: the first lifting device further comprises a guide rod (17) and a guide sleeve (26), the guide sleeve (26) is fixed on an external supporting plate, the guide rod (17) penetrates through the guide sleeve (26) to be fixedly connected with the drag flask mold (2) or the cope flask mold (14), and the compaction oil cylinder (18) penetrates through the external supporting plate to be fixedly connected with the drag flask mold (2) or the cope flask mold (14); the second lifting device also comprises a guide shaft (20), and the guide shaft (20) penetrates through an external fixing plate to be fixedly connected with the lower surface of the supporting plate (19).

4. A four-station vertical sand-adding molding machine as claimed in claim 1, wherein: the clamping device comprises a frame-shaped sand box outer frame (24), a telescopic sand box positioning shaft (25) and a turnover shaft (23) which is arranged on the outer side wall of the sand box outer frame (24) relatively, wherein the sand box positioning shaft (25) is arranged on the inner side wall of the sand box outer frame (24) relatively, and the sand box outer frame (24) is rotatably arranged at one end of a rotating arm extending outwards through the turnover shaft (23).

5. A four-station vertical sand-adding molding machine as claimed in claim 1, wherein: the upper box rotating arm (12) and the lower box rotating arm (4) are four arms which are of cross structures and extend outwards, and the using method of the upper box rotating arm and the lower box rotating arm comprises the following steps:

a. moulding

The first arm of the upper box rotating arm (12) and the first arm of the lower box rotating arm (4) are positioned at the sand box compacting mechanism, after the upper box compacting mechanism drives the upper sand box mould to ascend and contact with the empty upper sand box, the clamping device is loosened, the upper box compacting mechanism lifts the upper sand box to the lower part of the upper box sand bin, and simultaneously, after the lower box compacting mechanism drives the lower sand box mould to ascend and contact with the empty lower sand box, the clamping device is loosened, and the lower box compacting mechanism lifts the lower sand box to the lower part of the lower box sand bin;

the upper box sand bin and the lower box sand bin are used for adding molding sand into the upper sand box and the lower sand box respectively; continuously lifting the upper box compacting mechanism and the lower box compacting mechanism to compact and mold the molding sand in the upper sand box and the lower sand box; the cope flask descends to a clamping device of the upper flask rotating arm (12), the clamping device clamps the cope flask, the upper flask mold descends to an initial position, the drag flask descends to the clamping device of the lower flask rotating arm at the same time, the clamping device clamps the drag flask, and the lower flask mold descends to the initial position;

b. the upper box rotating arm (12) and the lower box rotating arm (4) rotate 90 degrees relatively respectively;

c. lower core and inflating hole

The sand box turnover mechanism of the first arm of the upper box rotating arm (12) drives the upper sand box to turn 180 degrees for air hole injection, and the first arm of the lower box rotating arm (4) simultaneously drives the lower sand box to turn 180 degrees for core setting; repeating the step a by the upper tank rotating arm (12) and the lower tank rotating arm (4) at the same time;

d. the upper box rotating arm (12) and the lower box rotating arm (4) are relatively rotated for 90 degrees again along the direction in the step b respectively;

e. mould assembling box

The cope flask rotating arm (12) drives the cope flask to rotate above the mould assembling mechanism, meanwhile, the drag flask rotating arm drives the drag flask to rotate above the mould assembling mechanism, a supporting plate of the mould assembling mechanism ascends to sequentially support the drag flask, the cope flask descends to an initial position after mould assembling is completed, and the sand flask is demoulded or a new sand flask is installed after the mould assembling is removed by means of an external tool; c, repeating the action of the first arm in the step c by the upper box rotating arm (12) and the second arm of the lower box rotating arm (4) at the same time; repeating the step a by the third arm of the upper box rotating arm (12) and the lower box rotating arm (4) at the same time;

f. the upper box rotating arm (12) and the lower box rotating arm (4) are relatively rotated for 90 degrees again along the direction in the step b respectively;

g. cleaning of

The first arm of the upper box rotating arm (12) and the first arm of the lower box rotating arm (4) reach a cleaning station, and the sand box is cleaned by means of an external tool; repeating the action of the first arm in the step e by the upper box rotating arm (12) and the second arm of the lower box rotating arm (4) at the same time; c, repeating the action of the first arm in the step c by the upper box rotating arm (12) and the third arm of the lower box rotating arm (4) at the same time; repeating the step a by the fourth arm of the upper box rotating arm (12) and the lower box rotating arm (4) at the same time;

h. the upper box rotating arm (12) and the lower box rotating arm (4) are relatively rotated for 90 degrees again along the direction in the step b respectively;

i. returning the first arm of the upper box rotating arm (12) and the first arm of the lower box rotating arm (4) to the molding station to repeat the step a, and simultaneously repeating the action of the first arm in the step g of repeating the second arm of the upper box rotating arm (12) and the second arm of the lower box rotating arm (4); repeating the action of the first arm in the step e by the upper box rotating arm (12) and the third arm of the lower box rotating arm (4) at the same time; c, repeating the action of the first arm in the step c by the fourth arm of the upper box rotating arm (12) and the lower box rotating arm (4) at the same time;

j. the first arm of the upper box rotating arm (12) and the first arm of the lower box rotating arm (4) are subjected to repeated modeling, core setting, air hole opening, box closing and cleaning, the second arm, the third arm and the fourth arm respectively lag behind the previous arm for one procedure, and the operation is circulated.

Technical Field

The invention belongs to the technical field of casting molding equipment, and particularly relates to a four-station vertical sand adding molding machine.

Background

The problems that molding sand is not filled in a real manner and a higher workpiece is washed with sand and is shaded to cause molding failure are frequently encountered in the molding process of the conventional molding equipment, and the molding problem is more obvious when the height of the workpiece is higher, so that the quality and the production efficiency of the workpiece are influenced.

Disclosure of Invention

The molding sand in the upper sand box and the lower sand box of the four-station vertical sand adding molding machine is filled into the sand boxes from the upper parts, so that the problems of molding sand filling incompactness and molding failure caused by sand washing shadow of higher workpieces in other molding equipment can be well solved, the advantages of the molding of the workpieces with higher heights are more obvious, the four operations are simultaneously performed, and the production efficiency is high.

The invention discloses a four-station vertical sand adding molding machine which comprises a rotating shaft, a rotating arm, a sand box compacting mechanism, a lower core and air hole opening station, a box closing mechanism, a cleaning station, a sand bin and a sand box turnover mechanism, wherein the rotating shaft, the rotating arm and the sand box compacting mechanism are vertically arranged, the sand box compacting mechanism, the lower core and air hole opening station, the box closing mechanism and the cleaning station are sequentially arranged on the outer side of the rotating shaft, the sand bin is arranged right above the sand box compacting mechanism; the rotating arm is arranged on the rotating shaft and rotates around the rotating shaft, and a sand box turnover mechanism is arranged at the outer end of the rotating arm and is positioned in an area between the sand bin and the sand box compacting mechanism;

the middle part of the rotating arm is arranged on the rotating shaft, the rotating arm comprises an upper box rotating arm and a lower box rotating arm, the upper box rotating arm and the lower box rotating arm are both of a cross structure, one end of the rotating arm extending outwards is provided with a sand box turnover mechanism, the rotating shaft comprises an upper box rotating shaft and a lower box rotating shaft which are arranged at intervals, the upper box rotating arm is arranged on the upper box rotating shaft, the lower box rotating arm is arranged on the lower box rotating shaft, the sand box compacting mechanism comprises an upper box compacting mechanism arranged on the outer side of the upper box rotating shaft and a lower box compacting mechanism arranged on the outer side of the lower box rotating shaft, the box combining mechanism is arranged between the upper box rotating shaft and the lower box rotating shaft, and the sand bin comprises an upper box sand bin;

the lower box compacting mechanism comprises a first lifting device and a lower sand box mold arranged at the top of the telescopic end of the first lifting device, and the upper box compacting mechanism comprises a first lifting device and an upper sand box mold arranged at the top of the telescopic end of the first lifting device;

the box closing mechanism comprises a second lifting device and a supporting plate arranged at the top of the telescopic end of the second lifting device;

the sand box turnover mechanism comprises a clamping device for fixing the sand box and a driving device for driving the clamping device to turn over, and the clamping device is rotatably arranged in a U-shaped groove of the rotating arm;

the sand silo includes lower case sand silo and last case sand silo, lower case sand silo and last case sand silo bottom surface are equipped with lower case compacting plate and last case compacting plate respectively, all be equipped with the sand mouth of leading that is used for the molding sand to flow on lower case compacting plate and the last case compacting plate.

Preferably, the first lifting device comprises a compaction oil cylinder, the second lifting device comprises a box closing oil cylinder, and the compaction oil cylinder and the box closing oil cylinder both adopt hydraulic oil cylinders.

Preferably, the first lifting device further comprises a guide rod and a guide sleeve, the guide sleeve is fixed on an external supporting plate, the guide rod penetrates through the guide sleeve and is fixedly connected with a drag flask mold or a cope flask mold, and the compaction oil cylinder penetrates through the external supporting plate and is fixedly connected with the drag flask mold or the cope flask mold; the second lifting device further comprises a guide shaft, and the guide shaft penetrates through an external fixing plate to be fixedly connected with the lower surface of the supporting plate.

Preferably, clamping device includes the outer frame of the sand box of frame form, telescopic sand box location axle and the trip shaft of relative setting on the outer frame lateral wall of sand box, sand box location axle sets up relatively on the outer frame inside wall of sand box, the outer frame of sand box is installed on the swinging boom through the trip shaft rotation.

Preferably, the upper tank rotating arm and the lower tank rotating arm are both of a cross structure, and four arms extend outwards, and the using method of the upper tank rotating arm and the lower tank rotating arm comprises the following steps:

a. moulding

The first arm of the upper box rotating arm and the lower box rotating arm is positioned at the sand box compacting mechanism, after the upper box compacting mechanism drives the upper sand box mould to ascend and contact with the empty upper sand box, the clamping device is loosened, the upper box compacting mechanism lifts the upper sand box to the lower part of the upper box sand cabin, and simultaneously, after the lower box compacting mechanism drives the lower sand box mould to ascend and contact with the empty lower sand box, the clamping device is loosened, and the lower box compacting mechanism lifts the lower sand box to the lower part of the lower box sand cabin;

the upper box sand bin and the lower box sand bin are used for adding molding sand into the upper sand box and the lower sand box respectively; continuously lifting the upper box compacting mechanism and the lower box compacting mechanism to compact and mold the molding sand in the upper sand box and the lower sand box; the upper sand box descends to a clamping device of the upper box rotating arm, the clamping device clamps the upper sand box, the upper box mold descends to an initial position, the lower sand box descends to the clamping device of the lower box rotating arm, the clamping device clamps the lower sand box, and the lower box mold descends to the initial position;

b. the upper box rotating arm and the lower box rotating arm respectively rotate for 90 degrees relatively;

c. lower core and inflating hole

The sand box turnover mechanism of the first arm of the upper box rotating arm drives the upper sand box to turn 180 degrees for air hole injection, and the first arm of the lower box rotating arm simultaneously drives the lower sand box to turn 180 degrees for core setting; repeating the step a by using the upper tank rotating arm and the lower tank rotating arm as the second arm;

d. the upper box rotating arm and the lower box rotating arm respectively rotate for 90 degrees relatively along the direction in the step b;

e. mould assembling box

The cope flask rotating arm drives the cope flask to rotate above the mould assembling mechanism, meanwhile, the drag flask rotating arm drives the drag flask to rotate above the mould assembling mechanism, a supporting plate of the mould assembling mechanism ascends to sequentially support the drag flask and the cope flask to descend to an initial position after mould assembling is completed, and the sand flask is demoulded by means of an external tool or the sand flask after mould assembling is disassembled is installed with a new sand flask; repeating the action of the first arm in the step c by the upper box rotating arm and the second arm of the lower box rotating arm; repeating the step a by using a third arm of the upper box rotating arm and the lower box rotating arm at the same time;

f. the upper box rotating arm and the lower box rotating arm respectively rotate for 90 degrees relatively along the direction in the step b;

g. cleaning of

A first arm of the upper box rotating arm and the lower box rotating arm reaches a cleaning station, and the sand box is cleaned by means of an external tool; repeating the action of the first arm in the step e by the upper box rotating arm and the second arm of the lower box rotating arm; c, repeating the action of the first arm in the step c by the upper box rotating arm and the third arm of the lower box rotating arm; repeating the step a by using the fourth arm of the upper box rotating arm and the lower box rotating arm;

h. the upper box rotating arm and the lower box rotating arm respectively rotate for 90 degrees relatively along the direction in the step b;

i. returning the first arm of the upper box rotating arm and the first arm of the lower box rotating arm to the molding station to repeat the step a, and simultaneously repeating the action of the first arm in the step g by the second arm of the upper box rotating arm and the second arm of the lower box rotating arm; repeating the action of the first arm in the step e by the third arm of the upper box rotating arm and the lower box rotating arm; repeating the action of the first arm in the step c by the fourth arm of the upper box rotating arm and the lower box rotating arm;

j. the first arms of the upper box rotating arm and the lower box rotating arm are subjected to repeated modeling, core setting, air hole opening, box closing and cleaning, the second arm, the third arm and the fourth arm respectively lag behind the previous arm for one procedure, and the operation is circulated.

The invention has the beneficial effects that: the invention has simple structure and stable work, the molding sand in the upper box and the lower box is filled into the sand box from the upper part, the problems of molding sand filling incompact and molding failure caused by sand washing shadow of higher workpieces in other molding equipment can be well solved, and the molding advantage is more obvious when the height of the workpiece is higher. The invention can realize both the boxed molding and the boxless molding, and can be flexibly changed only by modifying the sand box part. The four-station molding machine can realize all molding processes by one host, integrates multiple processes, has compact structure, improves the molding precision and ensures the workpiece quality; and four stations work simultaneously, can carry out four processes of molding, core setting and air hole opening, mould assembling and cleaning simultaneously, and the circulation operation has very big improvement production efficiency, reduce time and personnel cost.

Drawings

FIG. 1 is a front view of the present invention;

FIG. 2 is a top view of FIG. 1;

in the drawing, 1, a lower box compaction mechanism, 2, a lower box mould, 3, a lower box, 4, a lower box rotating arm, 5, a lower box compaction plate, 6, a lower box sand cabin, 7, an upper box power unit, 8-1, an upper box rotating shaft, 8-2, a lower box rotating shaft, 9, an upper box sand cabin, 10, an upper box compaction plate, 11, an upper box, 12, an upper box rotating arm, 13, a lower box power unit, 14, an upper box mould, 15, an upper box compaction mechanism, 16, a box combination mechanism, 17, a guide rod, 18, a compaction oil cylinder, 19, a supporting plate, 20, a guide shaft, 21, a box combination oil cylinder, 23, a turnover shaft, 24, an outer frame, 25, a sand box positioning shaft, 26 and a guide sleeve.

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments:

the invention discloses a four-station vertical sand adding molding machine which comprises a rotating shaft, a rotating arm, a sand box compacting mechanism, a lower core and air hole opening station, a box closing mechanism 16, a cleaning station, a sand cabin and a sand box turnover mechanism, wherein the rotating shaft, the rotating arm and the sand box compacting mechanism are vertically arranged, the sand box compacting mechanism, the lower core and air hole opening station, the sand box closing mechanism and the cleaning station are sequentially arranged on the outer side of the rotating shaft, the sand cabin is arranged right above the sand box compacting; the rotating arm is arranged on the rotating shaft and rotates around the rotating shaft, and a sand box turnover mechanism is arranged at the outer end of the rotating arm and is positioned in an area between the sand bin and the sand box compacting mechanism;

the middle parts of the rotating arms are arranged on the rotating shaft, the rotating arms comprise an upper box rotating arm 12 and a lower box rotating arm 4, the upper box rotating arm 12 and the lower box rotating arm 4 are both in a cross structure, one end of the rotating arm 12 extending outwards is provided with a sand box turnover mechanism, the rotating shafts comprise an upper box rotating shaft 8-1 and a lower box rotating shaft 8-2 which are arranged at intervals, the upper box rotating arm 12 is arranged on the upper box rotating shaft 8-1, the lower box rotating arm 4 is arranged on the lower box rotating shaft 8-2, the sand box compacting mechanism comprises an upper box compacting mechanism 15 arranged on the outer side of an upper box rotating shaft 8-1 and a lower box compacting mechanism 1 arranged on the outer side of a lower box rotating shaft 8-2, the box assembling mechanism 16 is arranged between an upper box rotating shaft 8-1 and a lower box rotating shaft 8-2, and the sand silo comprises an upper box sand silo 9 and a lower box sand silo 6;

the lower box compacting mechanism 1 comprises a first lifting device and a lower sand box mold 2 arranged at the top of the telescopic end of the first lifting device, and the upper box compacting mechanism 15 comprises a first lifting device and an upper sand box mold 14 arranged at the top of the telescopic end of the first lifting device;

the box closing mechanism 16 comprises a second lifting device and a supporting plate 19 arranged at the top of the telescopic end of the second lifting device;

the sand box turnover mechanism comprises a clamping device for fixing the sand box and a driving device for driving the clamping device to turn over, and the clamping device is rotatably arranged in a U-shaped groove of the rotating arm;

the sand silo includes lower case sand silo 6 and last case sand silo 9, lower case sand silo 6 and 9 bottom surfaces of last case sand silo are equipped with lower case compacting plate 5 and last case compacting plate 10 respectively, all be equipped with the sand mouth of leading that is used for the molding sand to flow on lower case compacting plate 5 and the last case compacting plate 10.

Preferably, the first lifting device comprises a compaction oil cylinder 18, the second lifting device comprises a box closing oil cylinder 21, and both the compaction oil cylinder 18 and the box closing oil cylinder 21 adopt hydraulic oil cylinders.

Preferably, the first lifting device further comprises a guide rod 17 and a guide sleeve 26, the guide sleeve 26 is fixed on the outer supporting plate, the guide rod 17 passes through the guide sleeve 26 to be fixedly connected with the drag flask mold 2 or the cope flask mold 14, and the compaction cylinder 18 passes through the outer supporting plate to be fixedly connected with the drag flask mold 2 or the cope flask mold 14; the second lifting device further comprises a guide shaft 20, and the guide shaft 20 penetrates through an external fixing plate to be fixedly connected with the lower surface of the supporting plate 19.

The guide rods 17 enable the cope flask mold 14 and the drag flask mold 2 to be vertically arranged, so that the molding precision during the compaction process is improved, and the guide shafts 20 enable the mold assembling precision to be higher.

Preferably, the sand box turnover mechanism comprises a clamping device for fixing the sand box and a driving device for driving the clamping device to turn over, and the clamping device is rotatably arranged in the U-shaped groove of the rotating arm; the clamping device adopts a sand box outer frame 24 with a frame-shaped structure, the outer side of the sand box outer frame is rotatably arranged on the rotating arm through a turnover shaft 23, a sand box positioning shaft 25 is arranged on the inner side wall of the sand box outer frame, clamping and releasing of a sand box are realized through extension and contraction of the sand box positioning shaft 25, and the driving device drives the sand box outer frame 24 to realize turnover of the sand box.

Preferably, the bottom surface of the sand silo is provided with a compacting plate, and the compacting plate is provided with a sand guide opening for the outflow of the molding sand.

The upper box rotating arm and the lower box rotating arm are four arms which are of cross structures and extend outwards, and the using method of the upper box rotating arm and the lower box rotating arm comprises the following steps:

a. moulding

The first arm of the upper box rotating arm and the lower box rotating arm is positioned at the sand box compacting mechanism, after the upper box compacting mechanism drives the upper sand box mould to ascend and contact with the empty upper sand box, the clamping device is loosened, the upper box compacting mechanism lifts the upper sand box to the lower part of the upper box sand cabin, and simultaneously, after the lower box compacting mechanism drives the lower sand box mould to ascend and contact with the empty lower sand box, the clamping device is loosened, and the lower box compacting mechanism lifts the lower sand box to the lower part of the lower box sand cabin;

the upper box sand bin and the lower box sand bin are used for adding molding sand into the upper sand box and the lower sand box respectively; continuously lifting the upper box compacting mechanism and the lower box compacting mechanism to compact and mold the molding sand in the upper sand box and the lower sand box; the upper sand box descends to a clamping device of the upper box rotating arm, the clamping device clamps the upper sand box, the upper box mold descends to an initial position, the lower sand box descends to the clamping device of the lower box rotating arm, the clamping device clamps the lower sand box, and the lower box mold descends to the initial position;

b. the upper box rotating arm and the lower box rotating arm respectively rotate for 90 degrees relatively;

c. lower core and inflating hole

The sand box turnover mechanism of the first arm of the upper box rotating arm drives the upper sand box to turn 180 degrees for air hole injection, and the first arm of the lower box rotating arm simultaneously drives the lower sand box to turn 180 degrees for core setting; repeating the step a by using the upper tank rotating arm and the lower tank rotating arm as the second arm;

d. the upper box rotating arm and the lower box rotating arm respectively rotate for 90 degrees relatively along the direction in the step b;

e. mould assembling box

The cope flask rotating arm drives the cope flask to rotate above the mould assembling mechanism, meanwhile, the drag flask rotating arm drives the drag flask to rotate above the mould assembling mechanism, a supporting plate of the mould assembling mechanism ascends to sequentially support the drag flask and the cope flask to descend to an initial position after mould assembling is completed, and the sand flask is demoulded by means of an external tool or the sand flask after mould assembling is disassembled is installed with a new sand flask; repeating the action of the first arm in the step c by the upper box rotating arm and the second arm of the lower box rotating arm; repeating the step a by using a third arm of the upper box rotating arm and the lower box rotating arm at the same time;

f. the upper box rotating arm and the lower box rotating arm respectively rotate for 90 degrees relatively along the direction in the step b;

g. cleaning of

A first arm of the upper box rotating arm and the lower box rotating arm reaches a cleaning station, and the sand box is cleaned by means of an external tool; repeating the action of the first arm in the step e by the upper box rotating arm and the second arm of the lower box rotating arm; c, repeating the action of the first arm in the step c by the upper box rotating arm and the third arm of the lower box rotating arm; repeating the step a by using the fourth arm of the upper box rotating arm and the lower box rotating arm;

h. the upper box rotating arm and the lower box rotating arm respectively rotate for 90 degrees relatively along the direction in the step b;

i. returning the first arm of the upper box rotating arm and the first arm of the lower box rotating arm to the molding station to repeat the step a, and simultaneously repeating the action of the first arm in the step g by the second arm of the upper box rotating arm and the second arm of the lower box rotating arm; repeating the action of the first arm in the step e by the third arm of the upper box rotating arm and the lower box rotating arm; repeating the action of the first arm in the step c by the fourth arm of the upper box rotating arm and the lower box rotating arm;

j. the first arms of the upper box rotating arm and the lower box rotating arm are subjected to repeated modeling, core setting, air hole opening, box closing and cleaning, the second arm, the third arm and the fourth arm respectively lag behind the previous arm for one procedure, and the operation is circulated.

In addition, an upper tank power unit 7 for driving the upper tank rotation arm 12 to rotate and a lower tank power unit 13 for driving the lower tank rotation arm 4 to rotate are provided.

The invention has simple structure and stable work, the molding sand in the upper box and the lower box is filled into the sand box from the upper part, the problems of molding sand filling incompact and molding failure caused by sand washing shadow of higher workpieces in other molding equipment can be well solved, and the molding advantage is more obvious when the height of the workpiece is higher. The invention can realize both the boxed molding and the boxless molding, and can be flexibly changed only by modifying the sand box part. The four-station molding machine can realize all molding processes by one host, integrates multiple processes, has compact structure, improves the molding precision and ensures the workpiece quality; four processes of modeling, core setting and air hole opening, box closing and cleaning are carried out simultaneously and circularly, the common assembly line method is abandoned, the production efficiency is greatly improved, and the time and the personnel cost are reduced.