CN219817943U - Core type integrated sand mold structure for casting cylinder cover - Google Patents

Abstract

The utility model discloses a core type integrated sand mold structure for casting a cylinder cover, which comprises a lower sand box, an upper sand box and a cavity positioned at the interface of the lower sand box and the upper sand box, wherein the upper side of the lower sand box is detachably connected with the upper sand box, the opening of the middle part of the upper sand box is detachably connected with a mold cover, at least one exhaust flow blocking assembly is arranged on the mold cover, a pouring channel is connected between the tail end of the cavity positioned in the upper sand box and the exhaust flow blocking assembly, after the cavity is filled with molten iron, the molten iron flows upwards along the pouring channel, a prefabricated hole and an exhaust hole can meet the requirement of exhaust, the molding quality of the casting contour of the cylinder cover is ensured, and after the molten iron contacts with a loam core, the molten iron can push the loam core and a mud-binding plate to rise until the mud-binding plate is thoroughly attached to the top wall of the upper sand box, so that the overflow of the molten iron can be prevented, the molten iron can be continuously pressurized and injected into the cavity to a certain pressure, a manual riser is not needed, and the safety is high.

Description

Core type integrated sand mold structure for casting cylinder cover

Technical Field

The utility model relates to the technical field of sand casting, in particular to a core type integrated sand mold structure for casting a cylinder cover.

Background

The casting mold is a casting mold cavity made of raw sand, adhesive and other auxiliary materials in the casting production process, the casting sand tightly fixed in the upper sand box and the lower sand box and the upper sand box and the lower sand box are respectively called an upper sand mold and a lower sand mold, a cavity left after the pattern is taken out of the casting mold is called a mold cavity, during casting, molten metal is poured from an outer gate through a straight gate, a side gate and an inner gate, a person cavity is formed in the highest position of the mold cavity, an air outlet is formed in the sand mold above the mold cavity, an air vent which is pricked by an air ventilation needle is formed in the sand mold above the mold cavity and used for discharging gas generated in the mold cavity and the sand mold core, and whether the mold cavity is full of the molten metal can be observed through the air outlet;

when the cylinder cover is cast in a pressurizing mode, whether the cavity is fully poured by the molten metal or not needs to be observed through the riser, after excessive molten metal overflows, the riser is plugged for pressurizing casting, however, the step of plugging the riser in the pressurizing casting process is complex, and the artificial riser is plugged with great potential safety hazards, so that the utility model provides a core type integrated sand mold structure for casting the cylinder cover is used for solving the problem.

Disclosure of Invention

The utility model provides a core type integrated sand mold structure for casting a cylinder cover, which solves the technical problems that the step of plugging a riser is complicated in the traditional sand mold pressurizing casting process, and the manual plugging of the riser has great potential safety hazard.

In order to solve the technical problems, the core type integrated sand mold structure for casting the cylinder cover comprises a drag flask, a cope flask and a cavity positioned at the interface of the drag flask and the cope flask, wherein the upper side of the drag flask is detachably connected with the cope flask, a mold cover is detachably connected at an opening in the middle of the cope flask, at least one exhaust choke assembly is arranged on the mold cover, and a pouring channel is connected between the tail end of the cavity positioned in the cope flask and the exhaust choke assembly.

Preferably, the exhaust choke component comprises a sliding cavity positioned in the mold cover, exhaust ports are formed in two sides of the sliding cavity, a spline plate is embedded in the sliding cavity in a sliding mode, a vertical shaft is fixed in the center of the spline plate, two exhaust ports respectively penetrate out of two ends of the vertical shaft, a spring is arranged between the spline plate and the top wall of the sliding cavity and positioned outside the vertical shaft, and the size of the exhaust port is larger than the section size of the vertical shaft.

Preferably, the bottom of the vertical shaft extends to the adjacent pouring channel and is fixedly connected with an exhaust plate, a plurality of exhaust holes are formed in the edge of the exhaust plate, a mud-bonding plate is fixedly connected to the lower side of the exhaust plate, the mud-bonding plate is of a columnar structure with a narrow upper part and a wide lower part, a layer of mud core of an adaptive pouring channel section structure is coated on the outer side of the mud-bonding plate, and corresponding prefabricated holes are formed in the mud core corresponding to the exhaust holes.

Preferably, the first perforated plate is fixed at the upper side edge of the drag flask, the upper side edge of the drag flask is provided with a convex ring, the lower side edge of the drag flask is provided with the same number of second perforated plates corresponding to the first perforated plates, the lower side edge of the drag flask is provided with a groove structure corresponding to the convex ring, and the adjacent first perforated plates and the second perforated plates are screwed.

Preferably, a stepped groove is formed in the opening in the middle of the cope flask, a plurality of screws are fixed on the upper side of the edge of the stepped groove, the same number of perforations are formed in the mold cover corresponding to the screws, and nuts are connected with the tops of the screws in a threaded mode through the adjacent perforations.

Preferably, the middle part of the die cover is provided with a pouring gate, the upper part of the die cavity is provided with a diversion channel, and the diversion channel is opposite to the pouring gate.

Compared with the related art, the core type integrated sand mold structure for casting the cylinder cover has the following beneficial effects:

according to the core-type integrated sand mold structure for casting the cylinder cover, after the cavity is filled with molten iron, the molten iron flows upwards along the pouring channel, the prefabricated holes and the exhaust holes can meet the requirement of exhaust, the molding quality of the casting outline of the cylinder cover is guaranteed, until the molten iron contacts with the clay core, the clay core and the mud plate are pushed to rise by the molten iron until the mud plate is thoroughly attached to the top wall of the cope flask, the overflow of the molten iron can be prevented, the molten iron can be continuously pressurized and injected into the cavity to a certain pressure, a riser is not required to be plugged manually, the safety is high, the casting of the cylinder cover manufactured after cooling has high dimensional accuracy and surface smoothness, and the molding quality of the casting of the cylinder cover is greatly improved.

Drawings

FIG. 1 is a perspective view of a core-type integrated sand mold structure for casting a cylinder head according to the present utility model;

FIG. 2 is a side cross-sectional view of a core-in-one sand mold structure for casting cylinder heads in accordance with the present utility model;

fig. 3 is an enlarged view of the structure a in fig. 2 of a core-type integrated sand mold structure for casting a cylinder head according to the present utility model.

Reference numerals in the drawings: 1. a drag flask; 11. a first perforated plate; 12. a convex ring; 2. a cope flask; 21. a second perforated plate; 22. a screw; 23. a nut; 3. a cavity; 4. a mold cover; 41. perforating; 42. a gate; 5. an exhaust choke assembly; 51. a sliding cavity; 52. an exhaust port; 53. a flower key plate; 54. a vertical axis; 55. a spring; 56. an exhaust plate; 57. an exhaust hole; 58. a mud-binding plate; 59. a mud core; 6. pouring the channel.

Detailed Description

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

Examples: 1-3, a core-type integrated sand mold structure for casting a cylinder head of the utility model comprises a drag flask 1, a cope flask 2 and a cavity 3 positioned at the interface of the drag flask 1 and the cope flask 2, wherein the upper side of the drag flask 1 is detachably connected with the drag flask 2, a first perforated plate 11 is fixed at the upper side edge of the drag flask 1, a convex ring 12 is arranged at the upper side edge of the drag flask 1, the same number of second perforated plates 21 are arranged at the lower side edge of the drag flask 2 corresponding to the first perforated plate 11, a groove structure is arranged at the lower side edge of the drag flask 2 corresponding to the convex ring 12, and the adjacent first perforated plates 11 and second perforated plates 21 are fixed by screws;

specifically, after the drag flask 1 and the cope flask 2 are aligned, the bulge loop 12 is embedded into the groove structure, a zigzag contact surface can be formed, and after bolts pass through the adjacent first perforated plate 11 and the second perforated plate 21, the bolts are screwed down with nuts, so that the contact surfaces of the drag flask 1 and the cope flask 2 can be pressed down, and leakage is prevented.

Further, a mold cover 4 is detachably connected to the middle opening of the cope flask 2, a stepped groove is formed in the middle opening of the cope flask 2, a plurality of screws 22 are fixed to the upper side of the edge of the stepped groove, the same number of through holes 41 are formed in the mold cover 4 corresponding to the screws 22, and nuts 23 are connected to the top ends of the screws 22 in a threaded mode through the adjacent through holes 41;

specifically, after the screw 22 and the through hole 41 are aligned, the die cover 4 can be embedded into the stepped groove, and after the nut 23 is in threaded connection with the screw 22, the die cover 4 can be pressed, so that the sealing performance is good.

Further, a gate 42 is arranged in the middle of the mold cover 4, and a diversion channel is arranged at the upper part of the cavity 3 and is opposite to the gate 42;

specifically, the flow guiding channel is used for guiding molten iron into the cavity 3, and the tail end of the flow guiding channel is located at the top wall of the cavity 3.

Further, at least one exhaust choke component 5 is arranged on the mold cover 4, a pouring channel 6 is connected between the tail end of the cavity 3 in the cope flask 2 and the exhaust choke component 5, the exhaust choke component 5 comprises a sliding cavity 51 positioned in the mold cover 4, exhaust ports 52 are formed in two sides of the sliding cavity 51, a spline plate 53 is embedded in the sliding cavity 51 in a sliding manner, a vertical shaft 54 is fixed in the center of the spline plate 53, two exhaust ports 52 respectively penetrate through two ends of the vertical shaft 54, a spring 55 is arranged between the spline plate 53 and the top wall of the sliding cavity 51 and positioned outside the vertical shaft 54, and the size of the exhaust ports 52 is larger than the cross section of the vertical shaft 54;

specifically, the spline plate 53 functions as a linear guide, and a gap is formed between the wavy outer wall of the spline plate 53 and the sliding chamber 51 so that hot air can be discharged from the sliding chamber 51 and the exhaust port 52.

Further, the bottom end of the vertical shaft 54 extends into the adjacent pouring channel 6 to be fixedly connected with an exhaust plate 56, a plurality of exhaust holes 57 are formed in the edge of the exhaust plate 56, a mud-forming plate 58 is fixedly connected to the lower side of the exhaust plate 56, the mud-forming plate 58 is in a cylindrical structure with a narrow upper part and a wide lower part, a layer of mud core 59 which is adapted to the cross-section structure of the pouring channel 6 is coated on the outer side of the mud-forming plate 58, and corresponding prefabricated holes are formed in the mud core 59 corresponding to the exhaust holes 57;

specifically, when molten iron flows upwards along the pouring channel 6, the gas in the cavity 3 will move the prefabricated hole, the vent hole 57, the sliding cavity 51 and the vent hole 52 to be discharged outwards until the molten iron contacts the clay core 59, and the clay core 59 and the mud-forming plate 58 will be pushed to rise by the molten iron until the mud-forming plate 58 is thoroughly attached to the top wall of the cope flask 2, so that the overflow of molten iron can be prevented;

specifically, the core 59 can prevent molten iron from directly contacting the exhaust plate 56, and after casting is completed, the core 59 is knocked off, and the mud-forming plate 58 provides an attachment position for the core 59, so that the core 59 is convenient to manufacture.

Working principle: when the device is used, as shown in fig. 2, molten iron is pressurized and injected into the diversion channel and the cavity 3 from the pouring gate 42, after the cavity 3 is filled, the molten iron flows upwards along the pouring channel 6, gas in the cavity 3 can move the prefabricated hole, the vent hole 57, the sliding cavity 51 and the vent hole 52 to be discharged outwards until the molten iron contacts the loam core 59, and after the prefabricated hole and the vent hole 57 are smaller, the molten iron can push the loam core 59 and the loam board 58 to rise until the loam board 58 is thoroughly attached to the top wall of the cope flask 2, so that the overflow of the molten iron can be prevented, the waste of the molten iron can be avoided, and then, the molten iron is continuously pressurized and injected from the pouring gate 42 to a certain pressure, so that the whole cavity 3 can be completely filled with the molten iron, and a cylinder head casting manufactured after cooling has very high dimensional accuracy and surface finish, the machining work can be reduced, and only a small processing allowance is required on parts.

It is noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (6)

1. The utility model provides a core formula integral type sand mould structure for casting cylinder head, includes drag flask (1), cope flask (2) and is located die cavity (3) of drag flask (1), drag flask (2) interface department, its characterized in that, drag flask (1) upside can be dismantled and be connected with cope flask (2), drag flask (2) middle part opening part can be dismantled and be connected with mould lid (4), be equipped with at least one exhaust choked flow subassembly (5) on mould lid (4), be located be connected with between die cavity (3) end and the exhaust choked flow subassembly (5) in drag flask (2) and water and overflow passageway (6).

2. A core-in-one sand mold structure for casting cylinder heads as claimed in claim 1 wherein: the exhaust choke subassembly (5) is including being located the inside smooth chamber (51) of mould lid (4), gas vent (52) have all been seted up to smooth chamber (51) both sides, it is equipped with spline board (53) to slide in smooth chamber (51), spline board (53) center is fixed with vertical axis (54), two gas vents (52) are worn out respectively at vertical axis (54) both ends, between spline board (53) and smooth chamber (51) roof and be located the vertical axis (54) outside and be equipped with spring (55), the size of gas vent (52) is greater than the cross-section size of vertical axis (54).

3. A core-in-one sand mold structure for casting cylinder heads as claimed in claim 2 wherein: the bottom of vertical axle (54) extends to adjacent pouring passageway (6) internal fixation and is connected with exhaust board (56), exhaust board (56) edge is equipped with a plurality of exhaust holes (57), the downside fixedly connected with knot mud board (58) of exhaust board (56), knot mud board (58) are narrow down wide columnar structure, just the outside cladding of knot mud board (58) has one deck adaptation pouring passageway (6) cross-section structure's loam core (59), loam core (59) are provided with corresponding prefabricated hole corresponding to exhaust hole (57).

4. A core-in-one sand mold structure for casting cylinder heads as claimed in claim 1 wherein: the novel sand box is characterized in that a first perforated plate (11) is fixed at the upper side edge of the drag sand box (1), a convex ring (12) is arranged at the upper side edge of the drag sand box (1), the same number of second perforated plates (21) are arranged on the lower side edge of the drag sand box (2) corresponding to the first perforated plates (11), a groove structure is arranged on the lower side edge of the drag sand box (2) corresponding to the convex ring (12), and the first perforated plates (11) and the second perforated plates (21) are adjacent to each other and are fixed by screws.

5. A core-in-one sand mold structure for casting cylinder heads as claimed in claim 1 wherein: the upper sand box (2) middle part opening part is provided with the ladder groove, and ladder groove edge upside is fixed with a plurality of screw rods (22), corresponding screw rods (22) are provided with perforation (41) of same quantity on the mould lid (4), adjacent perforation (41) threaded connection has nut (23) are worn out on screw rod (22) top.

6. A core-in-one sand mold structure for casting cylinder heads as claimed in claim 1 wherein: the middle part of the die cover (4) is provided with a pouring gate (42), and the upper part of the die cavity (3) is provided with a diversion channel which is opposite to the pouring gate (42).