CN217192417U - Sand core casting equipment - Google Patents

Abstract

The utility model discloses a sand core casting device, which comprises a sand core mould, wherein a cavity is arranged in the sand core mould, and the cavity is used for accommodating core sand mixed liquid and processing a sand core; the core pulling device comprises a core pulling body and a protruding piece, wherein the core pulling body is in sliding connection with a sand core mold, the core pulling body can be inserted into a cavity, a channel is arranged in the core pulling body, an outlet facing the inside of the cavity is formed in the channel, and the protruding piece slides in the channel and can extend out of the outlet. The utility model discloses an insert the psammitolite loose core for the inside cavity that produces of psammitolite after the shaping, through the degree of depth that stretches out in order to extend the cavity of piece moreover, thereby discharge in making the gas that the resin produced when casting can follow this cavity, promote the exhaust performance. The utility model relates to a psammitolite casting mould field.

Description

Sand core casting equipment

Technical Field

The utility model relates to a psammitolite casting equipment in the psammitolite casting mould field.

Background

The sand core is a casting mould in casting production, and is formed by mixing and casting molding materials such as raw sand, a molding sand binder, an auxiliary additive and the like according to a certain proportion. The raw sand is the most basic material for molding in casting production, wherein the most widely used raw sand is quartz sand, commonly called silica sand. In sand casting, the raw sand is the aggregate and the main component in the mixture, and the mass fraction of the raw sand is 80-99% according to the difference of the used adhesive. The core sand mixture can be divided into clay core sand, water glass core sand, oil core sand, resin core sand and the like according to different binders. In the casting process, high-temperature molten metal is poured into a casting mold to be molded, the casting mold is responsible for casting the shape of a finished product, and the sand core is inserted into the high-temperature molten metal and is responsible for casting the inner cavity of the finished product. Since the core is surrounded by molten metal at a high temperature during casting and the size of the supporting and positioning portion is small, the core is required to have not only heat resistance and rigidity but also high strength, air permeability, collapsibility and collapsibility. Wherein the permeability refers to the permeability of gas to the internal structure of the sand core, so that the gas generated in the casting process can be exhausted more quickly; the deformability refers to the capability of the casting of contracting in volume during condensation and the sand core compressing together with the casting to prevent the casting from cracking due to internal stress; collapsibility refers to the degree of difficulty and easiness in breaking a sand mold and a sand core after a casting is poured and solidified, and is also called desazability.

When resin is used as a binder for sand cores, the molten metal having a high temperature during casting causes the resin inside the sand cores to be decomposed into gas and impurities at a high temperature, and the fluidity is restored to facilitate cleaning, so that the resin binder is widely used. But the generated gas needs to be discharged in time, otherwise, the casting is easy to leak, or a pit is formed on the surface of the casting, and the surface of the product is uneven.

At present, the exhaust method for the sand core comprises the following steps: (1) exhausting gas by means of the clearance between the sand core positioning and the casting mold; (2) and an exhaust hole is additionally arranged at a position on the casting mould where gas is easy to gather. But the clearance between the sand core and the casting mold cannot be exactly positioned, and the exhaust direction has uncontrollable factors; the specific location of the gas convergence zone on the casting mold is not well understood.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to solve one of the technical problem that exists among the prior art at least, provide a psammitolite casting equipment, can produce the psammitolite that has from exhausting function.

According to the utility model discloses the embodiment provides a psammitolite casting equipment, include:

the sand core mold is internally provided with a cavity, and the cavity is used for accommodating the core sand mixed liquid and processing a sand core;

the core pulling device comprises a core pulling body and a protruding piece, wherein the core pulling body is connected with a sand core mold in a sliding mode, the core pulling body can be inserted into a cavity, a channel is arranged in the core pulling body, the channel is provided with an outlet facing the inside of the cavity, and the protruding piece slides in the channel and can extend out of the outlet.

According to the utility model discloses, furtherly, the body of loosing core is cylindrical, and its side is equipped with the drawing die inclination.

According to the utility model discloses, furtherly, the export sets up the side of the body of loosing core.

According to an embodiment of the invention, further, the extension is embodied as a wire rope.

According to the utility model discloses the embodiment, further, the cross-sectional shape of passageway is "L" shape.

According to the utility model discloses the embodiment, further, the corner of passageway has the radian.

According to the utility model discloses the embodiment, furtherly, the tip welding of cable wire is as an organic whole.

According to the utility model discloses, furtherly, it still includes the core iron to loose core, this internal slip pipeline that is equipped with of loosing core, the core iron is in slide in the slip pipeline, the one end of slip pipeline with the passageway intercommunication, the cable wire with the core iron is connected, the core iron is used for the drive the cable wire slides.

According to the utility model discloses, furtherly, psammitolite casting equipment still includes drive arrangement, drive arrangement includes mounting panel and guide arm, the mounting panel with guide arm sliding connection, the body of loosing core is installed on the mounting panel.

According to the utility model discloses the embodiment, furtherly, drive arrangement still includes the cylinder, the cylinder is installed on the mounting panel, the output of cylinder with the core iron is connected.

The utility model discloses beneficial effect includes at least: the utility model discloses an insert the psammitolite loose core for the inside cavity that produces of psammitolite after the shaping, through the degree of depth that stretches out in order to extend the cavity of piece moreover, thereby discharge in making the gas that the resin produced when casting can follow this cavity, promote the exhaust performance.

Drawings

In order to more clearly illustrate the technical solution in the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly described below. It is clear that the described figures represent only some embodiments of the invention, not all embodiments, and that a person skilled in the art can also derive other designs and figures from these figures without inventive effort.

FIG. 1 is a schematic view of an embodiment of the present invention during a casting process;

fig. 2 is a schematic diagram of the embodiment of the present invention after casting.

Detailed Description

This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.

The embodiment of the utility model provides a psammitolite casting equipment, it is on carrying out fashioned basis to the psammitolite surface through the psammitolite mould, adopts the structure of loosing core to handle the psammitolite is inside for the shaping goes out the cavity in the psammitolite, thereby the psammitolite is heated the gas that produces in the casting process and can be followed this cavity and directly discharged, reduces gaseous gathering and influence foundry goods surface quality on the foundry goods surface. Furthermore, the core pulling device is also provided with the extension piece, the depth of the cavity in the sand core can be improved by controlling the extension and retraction of the extension piece, the turning operation of the cavity in the sand core with a complex shape structure is facilitated, and the adaptability to sand core structures with different shapes is improved.

Description of the drawings figure 1 shows a schematic view of the present core casting apparatus during core casting. The sand core casting equipment comprises a sand core mould 1 for molding the outer surface of a sand core, a core pulling 2 for molding an inner cavity of the sand core and a driving device 3 for driving the core pulling 2 to slide and displace. Specifically, be equipped with in the psammitolite mould 1 and be used for holding core sand mixed liquid and carry out the cast cavity 11 of psammitolite, be equipped with a plurality of core sand mixed liquid injection mouths at the side of cavity 11 to realize that core sand mixed liquid pours into sand core mould 1 into simultaneously in different positions for core sand injection efficiency reduces the processing required time.

The core 2 comprises a core body 21, an extending piece and a core iron 23, wherein the core body 21 can extend into the cavity 11 of the sand core mould 1, so that the interior of the sand core is filled in the casting and forming process of the sand core, and the core body 21 is demoulded after the sand core is cooled, so that an inner cavity structure corresponding to the sand core can be obtained. In order to further prolong the depth of the inner cavity of the sand core, a channel 211 is arranged in the core pulling body 21, the end of the channel 211 is provided with an outlet 2111, and the extension piece can slide in the channel 211 and extend out of the outlet 2111. The outlet 2111 may be provided on the side of the core body 21 so that when the core shape is complex and provided with corners, the protrusion can protrude from the side of the core body 21 to accommodate the core shape. In this embodiment, the extension member is a wire rope 22, one end of which is connected to a core iron 23, and the core iron 23 can slide in the core back body 21 to control the extension and contraction of the wire rope 22.

The driving device 3 includes a mounting plate 31, a guide rod 32, and a cylinder 33. The mounting plate 31 is connected to the core back body 21, and guides the core back body 21 in the sliding direction by a guide rod 32, thereby controlling the insertion distance of the core back body 21. The cylinder 33 is mounted on the mounting plate 31, and the output end of the cylinder is connected to the core iron 23, so as to drive the core iron 23 to slide in the core pulling body 21, thereby controlling the extension distance of the steel cable 22.

Description of the drawings figure 2 shows a schematic view of the present core casting apparatus after casting is complete. When the high-temperature core-sand mixed liquid begins to cool, after the sand core is gradually formed, the steel cable 22 can be retracted into the core-pulling body 21, the core-pulling body 21 is pulled out from the sand core mold 1, the inner cavity of the sand core is formed at the moment, and the sand core can be separated from the sand core mold 1 after being completely cooled, so that the casting processing of the sand core is completed.

Referring to fig. 1 to 2, the sand core casting apparatus according to the embodiment of the present invention includes a sand core mold 1 and a core 2. The sand core mould 1 is internally provided with a cavity 11, and the shape of the cavity is designed to be the shape of a finished sand core product, so that after the high-temperature core sand mixed liquid is cooled, the shape of the finished core sand is the internal shape of the cavity 11.

The core pulling 2 comprises a core pulling body 21 and a protruding piece, the core pulling body 21 is connected with the sand core mould 1 in a sliding mode, and the core pulling body 21 can be inserted into the cavity 11, so that an inner cavity is formed inside the formed sand core. When the sand core is used for casting a metal casting, the sand core is inserted into high-temperature molten metal, the resin in the sand core reacts and generates gas at high temperature, and the gas can be discharged from the inner cavity and bubbles generated when the gas is gathered in the molten metal are reduced. To further extend the depth of the core cavity, a channel 211 is provided in the core body 21, and the end of the channel 211 is provided with an outlet 2111, the outlet 2111 facing the interior of the chamber 11, and a protrusion is able to slide in the channel 211 and protrude from the outlet 2111. Therefore, the depth of the inner cavity of the finished sand core can be prolonged by further extending the extension piece, and the direction of the outlet 2111 is changed, so that the core can adapt to the internal structure of the sand core with a complex structure, and the effect of turning and extending is achieved.

Further, the core pulling body 21 is cylindrical, and the side surface of the core pulling body is provided with a mold drawing slope, so that the extending end of the core pulling body 21 is smaller, and the core pulling body 21 is conveniently pulled out from the inside of the sand core.

Further, the outlet 2111 is provided at the side of the core body 21 so that the protrusion can protrude from the side of the core body 21, facilitating continued extension of the cavity at the core corners.

Further, in some embodiments, the protruding member is a metal block capable of sliding in the core back body 21, or other solid structure capable of withstanding high temperature; in this embodiment, the protrusion is a wire rope 22 that is slidable along the channel 211 and protrudes from the outlet 2111. Due to the flexibility of the steel cable 22, the shape restriction of the passage 211 is reduced.

It should be noted that, since the steel cable 22 is bent under the influence of gravity, the extending distance of the steel cable 22 from the core back body 21 should not be too long, preferably 80-100 mm. The height difference of the ends of the steel cable 22 should be controlled within 10mm to prevent the steel cable 22 from bending too much to cause the deformation of the inner cavity too much. When the steel cable 22 reaches the service life and the rigidity thereof cannot meet the use requirement, the steel cable should be replaced in time.

Further, the cross-sectional shape of the channel 211 is "L" shaped so as to guide the wire rope 22 for reversing and guiding the wire rope 22 to the outlet 2111.

Further, the corners of the channel 211 have a curvature to reduce the sliding resistance of the cable 22 in the channel 211, so as to facilitate the driving of the cable 22 for sliding.

Specifically, to process the channel 211 in the core back body 21, the end of the core back body 21 may be cut, and then a hollow groove may be dug therein, and the cut part may be welded again to obtain the channel 211 formed by two hollow grooves.

Further, the steel cable 22 is formed by winding a plurality of steel cables, and the ends of the steel cable 22 are welded together, so that the ends of the steel cable 22 are branched to prevent the formation of excessive gaps in the cavity of the sand core, and the resistance of the steel cable 22 when inserted into the mixed liquid of the sand core can be reduced.

Further, the core pulling 2 further comprises a core iron 23, a sliding pipeline 212 is arranged in the core pulling body 21, and the core iron 23 slides in the sliding pipeline 212. One end of the sliding pipe 212 is provided with an opening and is communicated with the channel 211, and the steel cable 22 is connected with the core iron 23, so that when the core iron 23 slides, the steel cable 22 can be driven to move in the channel 211, and the stretching and contracting of the steel cable 22 are controlled.

In order to replace the steel cable 22 at a later stage, the steel cable 22 is detachably connected with the core iron 23, and the steel cable 22 is fixed with the core iron 23 by adopting a jackscrew structure. Be equipped with a mounting hole in the core iron 23, one side of mounting hole is equipped with the jackscrew hole, and the jackscrew hole passes through threaded connection with the jackscrew, and the quantity in jackscrew hole can increase according to actual demand to the increase is to the joint strength of cable wire 22. One end of the steel cable 22 can be inserted into the mounting hole, and then the jackscrew is screwed in from the jackscrew hole, the end of the jackscrew is abutted against the side surface of the steel cable 22, and the steel cable 22 and the core iron 23 can be firmly fixed by continuously screwing the jackscrew. When the steel cable 22 is disassembled, the jackscrew is screwed out, and the disassembly and the assembly are very convenient.

Further, the present core-casting apparatus further includes a driving device 3 including a mounting plate 31 and a guide bar 32. One end of the guide rod 32 is connected with the sand core mould 1, and the mounting plate 31 is connected with the guide rod 32 in a sliding mode, and the sliding direction is parallel to the moving direction of the core back 2. The mounting plate 31 is connected to the core back body 21, so that the mounting plate 31 can drive the core back body 21 to move when moving. In practice, the mounting plate 31 is connected to a power unit, which may be a hydraulic press or an electric motor, or other device capable of applying power to the mounting plate 31, so that the mounting plate 31 slides along the guide rods 32.

Further, the driving device 3 further comprises a cylinder 33, the cylinder 33 is mounted on the mounting plate 31 and is provided with a telescopic output end, the telescopic output end is connected with the core iron 23, so that the cylinder 33 can move along with the mounting plate 31, and the movement of the core iron 23 can be controlled through the telescopic output end, and further the telescopic movement of the steel cable 22 can be controlled.

Next, a specific method of use of an embodiment of the present invention is described:

s1, uniformly stirring core sand and resin to obtain a core sand mixed solution;

s2, pouring the core sand mixed liquid into the cavity 11 in the sand core mold 1 to enable the core sand mixed liquid to fully fill the cavity 11;

s3, starting a heating component, heating the core sand mixed liquid through the sand core mold 1, and raising the temperature to 350 ℃;

s4, starting the driving device 3 to drive the mounting plate 31 to slide along the guide rod 32, so as to drive the core-pulling body 21 to be inserted into the cavity 11;

s5, starting the air cylinder 33 to drive the core iron 23 to move towards the interior of the sand core mold 1, further driving the steel cable 22 to slide in the channel 211 and finally extend out of the outlet 2111;

s6, standing the sand core casting equipment, and naturally cooling the sand core casting equipment or cooling the sand core casting equipment by adopting cooling equipment;

s7, after the sand core is cooled, starting the air cylinder 33 and driving the core iron 23 to retreat, and retracting the steel cable 22 into the channel 211;

s8, starting the driving device 3, driving the mounting plate 31 to retreat, driving the core pulling body 21 to leave the cavity 11, and completing demolding of the core pulling body 21;

s9, opening the sand core mold 1, and taking out the finished sand core from the sand core mold 1;

and S10, carrying out outer surface treatment on the finished sand core, cleaning burrs on the surface, and finishing the casting processing of the sand core.

While the preferred embodiments of the present invention have been described in detail, it will be understood by those skilled in the art that the invention is not limited to the details of the embodiments shown, but is capable of various modifications and substitutions without departing from the spirit of the invention.

Claims (10)

1. A sand core casting apparatus, comprising:

the sand core mold (1) is internally provided with a cavity (11), and the cavity (11) is used for containing core sand mixed liquid and processing a sand core;

loose core (2), it is including loosing core body (21) and extension piece, loose core body (21) with sand core mould (1) sliding connection, loose core body (21) can insert cavity (11), be equipped with passageway (211) in loosing core body (21), passageway (211) are equipped with the orientation export (2111) inside cavity (11), extension piece is in slide and can follow in passageway (211) export (2111) is stretched out.

2. The sand core casting apparatus of claim 1, wherein: the core-pulling body (21) is cylindrical, and the side surface of the core-pulling body is provided with a die-pulling inclination.

3. The sand core casting apparatus of claim 1, wherein: the outlet (2111) is arranged on the side face of the core pulling body (21).

4. The sand core casting apparatus of claim 1, wherein: the extension member is embodied as a wire rope (22).

5. The sand core casting apparatus of claim 4, wherein: the cross-sectional shape of the channel (211) is 'L' -shaped.

6. The sand core casting apparatus of claim 5, wherein: the channel (211) has a curvature at a corner thereof.

7. The sand core casting apparatus of claim 4, wherein: the ends of the steel cable (22) are welded into a whole.

8. The sand core casting apparatus of claim 4, wherein: the core pulling device (2) further comprises a core iron (23), a sliding pipeline (212) is arranged in the core pulling body (21), the core iron (23) slides in the sliding pipeline (212), one end of the sliding pipeline (212) is communicated with the channel (211), the steel cable (22) is connected with the core iron (23), and the core iron (23) is used for driving the steel cable (22) to slide.

9. The sand core casting apparatus of claim 8, wherein: psammitolite casting equipment still includes drive arrangement (3), drive arrangement (3) are including mounting panel (31) and guide arm (32), mounting panel (31) with guide arm (32) sliding connection, install body (21) of loosing core on mounting panel (31).

10. The sand core casting apparatus of claim 9, wherein: the driving device (3) further comprises an air cylinder (33), the air cylinder (33) is installed on the installation plate (31), and the output end of the air cylinder (33) is connected with the core iron (23).

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