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CN-122007348-A - Iron molding sand box for casting processing

CN122007348ACN 122007348 ACN122007348 ACN 122007348ACN-122007348-A

Abstract

The invention discloses an iron mold sand box for casting processing of castings, which comprises an iron shell mechanism, a sand box layer, a lower exhaust assembly and a lower exhaust assembly, wherein the iron shell mechanism comprises a lower iron shell and an upper iron shell, forming grooves are respectively formed in opposite sides of the upper iron shell and the lower iron shell, the sand box layer is fixedly covered in the forming grooves of the upper iron shell and the lower iron shell to form a workpiece forming cavity, the lower exhaust assembly comprises a plurality of lower exhaust holes which are uniformly distributed on the lower iron shell, a lower cover body is arranged at the bottom side of each lower exhaust hole, a vent pipe is respectively arranged at the lower cover body in a penetrating way, a corresponding second piston is arranged in each lower exhaust hole at the upper side of each vent pipe, a counterweight floating body is arranged at the lower side of each second piston, and a lower sealing ball body is arranged at the upper part of each counterweight floating body, and corresponding water bodies are filled into the lower exhaust holes through the vent pipes to enable the counterweight floating bodies to float upwards. On the basis of not affecting casting processing, the invention can effectively discharge the gas generated by the thermal decomposition of the organic matters in the sand cover in time and fully, thereby effectively improving the surface quality of the casting.

Inventors

  • LIAO LING
  • CHEN TIANXIANG
  • FU JIANJIAN
  • CHEN CANLONG
  • SU LIANGQING

Assignees

  • 龙岩时代智能装备有限公司

Dates

Publication Date
20260512
Application Date
20260205

Claims (10)

  1. 1. An iron-type sand box for casting and processing castings, which is characterized by comprising The iron shell mechanism (1) comprises a lower iron shell (101) and an upper iron shell (102) which is fixed on the upper side of the lower iron shell (101) in a closing manner, wherein corresponding forming grooves are respectively formed on the opposite sides of the upper iron shell (102) and the lower iron shell (101), and the upper iron shell (102) and the lower iron shell (101) form assembly under the fixation of a corresponding opposite lock mechanism (2); a sand box layer (3) fixedly covered in the forming grooves of the upper iron shell (102) and the lower iron shell (101) to form a workpiece forming cavity; The lower exhaust assembly (7) comprises a plurality of lower exhaust holes (701) which are all arranged on the lower iron shell (101), a corresponding lower cover body (702) is arranged at the bottom side of the lower exhaust holes (701), a ventilation pipe (8) which is arranged in the lower exhaust holes (701) is respectively arranged in a penetrating mode through the lower cover body (702), a corresponding second piston (703) is arranged in the lower exhaust holes (701) at the upper side of the ventilation pipe (8), a corresponding weight floating body (705) is arranged at the lower side of the second piston (703) downwards through a third elastic element (704), a lower sealing sphere (707) which is used for forming a seal at the top of the lower exhaust holes (701) is arranged at the upper side of the second piston (703) upwards through a fourth elastic element (706), the corresponding water body is filled into the lower exhaust holes (701) through the ventilation pipe (8), and the weight floating body (705) is respectively compressed through the third elastic element (704) and the fourth elastic element (706).
  2. 2. The iron mold flask for casting process according to claim 1, wherein after casting is completed, a water body located at a lower portion of the second piston (703) is evaporated after being heated and discharged along the vent pipe (8), the weight float (705) descends to the third elastic member (704) to be stretched, the second piston (703) descends to form a vacuum on an upper side of the lower vent hole (701), the lower seal ball (707) moves downward, gas in the flask layer (3) is discharged into the lower vent hole (701) through a space between the lower seal ball (707) and the lower vent hole (701), and after discharging is completed, the lower seal ball (707) is sealed at a top end of the lower vent hole (701) by a fourth elastic member (706).
  3. 3. The iron mold flask for casting according to claim 1, wherein the lower cover (702) is mounted on an upper side of a bottom end of the lower vent hole (701), and a bottom end portion of the vent pipe (8) extends to a lower side of the lower cover (702) and is positioned in the lower vent hole (701).
  4. 4. The iron-type sand box for casting processing according to claim 1, further comprising an upper air exhaust assembly (5), wherein the upper air exhaust assembly (5) comprises a plurality of upper air exhaust holes (501) which are all arranged on the upper iron shell (102), an upper cover body (502) is arranged at the top of each upper air exhaust hole (501), corresponding air holes (6) are respectively arranged on each upper cover body (502), a corresponding first piston (504) is fixedly connected downwards through a first elastic piece (503) on each upper cover body (502), an upper sealing sphere (506) for forming a closed bottom end part of each upper air exhaust hole (501) is fixedly connected downwards through a second elastic piece (505), corresponding water bodies are filled to the upper sides of the first pistons (504) through the air holes (6), the first pistons (504) are downwards moved downwards after being subjected to weight, the first elastic pieces (503) are stretched, and the second elastic pieces (505) are compressed.
  5. 5. The iron mold flask for casting according to claim 4, wherein after casting, a water body located at the upper part of the first piston (504) is evaporated after being heated and discharged along the ventilation hole (6), after the weight of the first piston (504) is reduced to be smaller than the pulling force of the first elastic member (503), the first piston (504) is lifted to vacuumize the lower side of the upper ventilation hole (501), the upper sealing sphere (506) is moved upwards, the gas in the flask layer (3) is discharged into the upper ventilation hole (501) through the interval between the upper sealing sphere (506) and the upper ventilation hole (501), and after the air discharge is completed, the upper sealing sphere (506) is sealed at the bottom end of the upper ventilation hole (501) under the action of the second elastic member (505).
  6. 6. The iron flask for casting according to claim 5, wherein the first elastic member (503), the second elastic member (505), the third elastic member (704), and the fourth elastic member (706) are coil springs, respectively.
  7. 7. An iron flask for casting according to claim 1, characterized in that the upper shell (102) is provided with a nozzle (4) communicating with the workpiece forming cavity and with a casting head (9) communicating with the workpiece forming cavity.
  8. 8. The iron mold flask for casting processing of castings according to claim 1, wherein the peripheral edges of the upper iron shell (102) and the lower iron shell (101) are respectively and fixedly connected with corresponding butt joint flanges (10) outwards, and the butt joint flanges (10) of the upper iron shell (102) and the lower iron shell (101) are locked and fixed through the locking mechanism (2).
  9. 9. The iron-type sand box for casting machining of castings according to claim 8, characterized in that the locking mechanism (2) comprises a plurality of C-shaped clamping plates (201) which are all arranged on the butt joint convex edge (10), one ends of the C-shaped clamping plates (201) are respectively provided with corresponding jacking protrusions (202), the other ends of the C-shaped clamping plates (201) are respectively provided with corresponding jacking bolts (203) in a threaded connection mode, one sides of the butt joint convex edge (10) opposite to each other are respectively provided with limiting grooves (11) matched with the jacking protrusions (202) and the jacking bolts (203), and the jacking protrusions (202) and the jacking bolts (203) are respectively fixed in the limiting grooves (11) of the butt joint convex edge (10) through screwing of the jacking bolts (203).
  10. 10. The iron mold flask for casting and processing castings according to claim 1, wherein a group of corresponding lifting bars (12) are fixedly connected to two sides of the upper iron shell (102) and the lower iron shell (101), and corresponding anti-falling plates (13) are fixedly connected to outer ends of the lifting bars (12).

Description

Iron molding sand box for casting processing Technical Field The invention relates to the technical field of molds for casting processing, in particular to an iron-type sand box for casting processing. Background The casting process is mainly a method of heating a casting material to liquid, then casting the casting material into a casting cavity which is matched with the shape of a part through corresponding ladle equipment, and obtaining the part or blank after the casting material is cooled and solidified. With the improvement of casting technology, the sand lined iron mold casting process is beginning to be widely used in casting processing. The mould used in the sand-lined metal mould casting process is mainly an iron mould sand box, and comprises a group of iron shells with forming grooves on opposite surfaces, and a sand box layer is fixedly covered on the wall of the forming groove of the group of iron shells. After the iron shell is assembled, a sand box layer arranged in the iron shell is assembled into a corresponding workpiece casting cavity. Because the sand box layer needs to use partial organic matter materials in the sand covering process, the partial organic matter materials can generate gas when being heated and decomposed, in order to realize the discharge of the partial gas, the prior art mainly comprises the steps of arranging an exhaust hole on an iron shell, and then filling an exhaust sand core in the exhaust hole, so that the exhaust hole can keep a certain exhaust effect on the premise of keeping the support of the sand box layer. Although the arrangement of the exhaust sand core can enable the exhaust hole to have a certain exhaust effect, the exhaust effect is relatively limited, so that gas cannot be timely and fully exhausted, and therefore defects such as air holes and pits on the surface of a casting are caused, and even the casting is scrapped when the defects are serious. Therefore, on the basis of not influencing the casting process, the iron-type sand box for casting process of the casting, which is disclosed by the invention, is designed to effectively discharge the gas generated by the thermal decomposition of the organic matters in the sand cover in time and fully, so that the surface quality of the casting is effectively improved. Disclosure of Invention The invention aims to solve the technical problems in the prior art, and provides the iron-type sand box for casting processing of castings, which can effectively solve the technical problems in the prior art. The technical scheme of the invention is as follows: An iron-type sand box for casting processing of castings, comprising The iron shell mechanism comprises a lower iron shell and an upper iron shell which is fixed on the upper side of the lower iron shell in a closing manner, wherein corresponding forming grooves are respectively formed on the opposite sides of the upper iron shell and the lower iron shell, and the upper iron shell and the lower iron shell are assembled under the fixation of corresponding locking mechanisms; The sand box layer is fixedly covered in the forming grooves of the upper iron shell and the lower iron shell to form a workpiece forming cavity; The lower exhaust assembly comprises a plurality of lower exhaust holes which are all arranged on the lower iron shell, the bottom side of each lower exhaust hole is provided with a corresponding lower cover body, the lower cover bodies are respectively and penetratingly provided with a vent pipe positioned in each lower exhaust hole, the lower exhaust holes at the upper side of each vent pipe are internally provided with corresponding second pistons, the lower sides of the second pistons are downwards provided with corresponding counterweight floating bodies through third elastic members, the upper parts of the second pistons are upwards provided with lower sealing balls which are used for forming sealing at the top of each lower exhaust hole through fourth elastic members, the corresponding water body is filled into the lower exhaust holes through the vent pipes, so that the counterweight floating bodies are upwards floated, and the third elastic members and the fourth elastic members are respectively compressed. After casting, the water body positioned at the lower part of the second piston is evaporated after being heated and is discharged along the ventilation pipe, the counterweight floating body descends to the third elastic piece to be stretched, the second piston descends to form vacuumizing on the upper side of the lower exhaust hole, the lower sealing ball moves downwards, gas in the sand box is discharged into the lower exhaust hole through the interval between the lower sealing ball and the lower exhaust hole, and after the air discharge is finished, the lower sealing ball is sealed at the top end of the lower exhaust hole under the action of the fourth elastic piece. The lower cover body is arranged at the upper side of the bottom en