CN210359149U - Combined precoated sand shell mold suitable for same sand shooting machine - Google Patents

Abstract

The utility model relates to the field of mold processing, in particular to a combined precoated sand shell mold suitable for the same sand shooting machine, which comprises a mold workbench, a stripper plate, a stripping column, a lower female mold, an upper male mold and a sand shooting plate, wherein the stripper plate is arranged above the mold workbench, the stripping column is propped between the precoated sand shell and the stripper plate, and the upper male mold is provided with a sand injection hole; the sand shooting plate is fixed above the upper male die through the supporting columns, the sand shooting plate is provided with sand blowing holes, the sand blowing holes are opposite to the sand injection holes, a sand guide cylinder is connected between the sand blowing holes and the sand injection holes, the peripheral edges of the sand shooting plate are provided with fixing holes for fixing a sand blowing cover of a sand core machine, the sand blowing holes are arranged in the inner peripheral range of the fixing holes, the sand blowing holes of the sand shooting plate are covered with a horizontal sand blocking plate and a vertical sand blocking plate, and sand blowing intervals are arranged between the sand blowing holes and the vertical sand blocking plate and between the sand blowing grooves and the horizontal sand blocking plate. Under the change of the size of the single side offset of the mold by 5-10cm, the sand blowing cover with the same specification can be matched with molds with different sizes, the purchase cost of equipment is reduced, and the production profit is improved.

Description

Combined precoated sand shell mold suitable for same sand shooting machine

Technical Field

The utility model relates to a mould processing field, concretely relates to combined tectorial membrane sand shell mould suitable for same sand shooting machine.

Background

Sand casting refers to a casting process that produces a casting in a sand mold. Steel, iron and most nonferrous metal castings can be obtained by sand casting. The molding material used for sand casting is cheap and easy to obtain, the casting mould is simple and convenient to manufacture, and the casting mould can adapt to single-piece production, batch production and mass production of castings, and is a basic process in casting production for a long time. The casting mould is characterized in that in order to obtain the structural shape of the part, other easily-formed materials are used for manufacturing the structural shape of the part in advance, then the part is placed in a sand mould, so that a cavity with the same structural size as the part is formed in the sand mould, then a fluid liquid is poured into the cavity, and the liquid is cooled and solidified to form the part with the same structural structure as the shape of the mould.

Tectorial membrane sand shell need place in the die cavity of mould when the shaping, then toward interior notes sand in the notes sand hole of following last mould, the sand fills up and forms the sand shell in the die cavity, be covered with the sand blowing cover of psammitolite machine in last mould top during the sand blowing, thereby blow into the die cavity with sand under pressure, just so need blow sand cover and last mould complete sealing fixed when blowing sand, the size that needs the sand blowing cover is the same with mould size matching on the mould, otherwise blow sand cover too big, it is less to go up the mould, unable fixed connection both, just can't guarantee the leakproofness. However, the size of the existing sand blowing cover is fixed, the size of the mould for producing the precoated sand shell is different, and if a sand core machine needs to be purchased or the sand blowing cover needs to be replaced every time a pair of moulds is opened, the cost is higher.

SUMMERY OF THE UTILITY MODEL

In view of the technical problem who exists among the prior art, the utility model provides a combined tectorial membrane sand shell mould suitable for same sand shooting machine under the change of the unilateral skew 5-10cm size of mould for the sand blowing cover of same specification can match the mould of equidimension not, reduces the cost of equipment purchase, improves the production profit.

In order to realize the technical purpose, the utility model discloses a technical scheme as follows:

combined tectorial membrane sand shell mould suitable for same sand blasting machine, including mould workstation, stripper plate, release post, lower die and epirelief mould, the stripper plate is installed in mould workstation top, the lower extreme of release post is fixed on the stripper plate, and the upper end of release post is passed lower die top on fashioned tectorial membrane sand shell, the epirelief mould lid just forms the shaping cavity under on the die between the two, be equipped with the notes sand hole on the epirelief mould.

The sand shooting plate is fixed above the upper male die through a support column, a plurality of sand blowing holes are formed in the sand shooting plate, the sand blowing holes are opposite to the sand injection holes, a sand guide cylinder is connected between the sand blowing holes and the sand injection holes, fixing holes for fixing a sand blowing cover of a sand core machine are formed in the peripheral edge of the sand shooting plate, the sand blowing holes are arranged in the inner peripheral range of the fixing holes, a sand blowing groove is further formed in the sand shooting plate, a horizontal sand blocking plate covers the sand blowing groove, sand blowing holes are also distributed in the sand blowing groove, longitudinal sand blocking plates cover other sand blowing holes except the sand blowing holes in the sand blowing groove, sand blowing intervals are formed between the sand blowing holes and the longitudinal sand blocking plate and between the sand blowing groove and the horizontal sand blocking plate, and sand blown out from the sand blowing cover enters the sand blowing holes through the sand blowing intervals.

The beneficial effect of this design is: under the condition of changing the size of a precoated sand shell mold and a sand shooting plate, the sand core cover suitable for the same sand core machine is suitable for, under the condition that the size of the sand blowing cover is not changed and the size of the mold and the sand shooting plate is changed, the cross sand blocking plate and the longitudinal sand blocking plate are added to change the angle and the speed of sand blowing, and once the sand blowing cover stops high-pressure sand blowing, sand above the sand shooting plate can be stopped on the shape with the 19-degree accumulation angle, because the shape can ensure that the sand cannot automatically leak downwards, and once the sand blowing high-pressure is opened, the sand can be quickly blown into the precoated sand shell mold. The lower part of the sand shooting plate is a forming cavity of the precoated sand shell mold, the sand blowing cover stops blowing sand, namely, the forming material of the lower sand shell is proved to be enough, residual sand is stopped on the upper surface of the sand shooting plate when the sand blowing is stopped immediately, even between a horizontal sand blocking plate and a sand blowing hole or between a vertical sand blocking plate and the sand blowing hole, and in order to ensure the forming quality of the lower sand shell, the forming of the accumulation angle is a key point.

Further inject, the front and back both sides position of shooting plate is arranged in to the crosspiece sand board, indulge to keep off the sand board and arrange in between two crosspiece sand boards, be equipped with on the shooting plate and arrange in the ladder that blows sand groove top is used for installing the crosspiece sand board, the last plane of crosspiece sand board and the last plane of shooting plate keep the level, have the sand-blowing interval between the lower plane of crosspiece sand board and the last plane of hourglass sand hole to the plane projection area of blowing sand groove is greater than the plane projection area of crosspiece sand board, and the crosspiece sand board is fixed when blowing sand groove top and is sealed wherein trilateral of blowing groove, the another side leaves the hourglass sand passageway to the hourglass sand hole. After the sand blowing cover is installed, the distance between the inner edge of the sand blowing cover and a sand blowing hole on the sand shooting plate is at least 25cm, the distance between the longitudinal sand blocking plate and the sand blowing hole and the distance between the transverse sand blocking plate and the sand blowing hole are at least 3-5 mm, so that a 19-degree stacking angle can be formed during sand blowing, at the moment, the design of the longitudinal sand blocking plate, the transverse sand blocking plate and the sand blowing groove can be suitable for installing the same sand blowing cover under the change of the unilateral deviation of a mold by 5-10cm, the purchase cost of equipment is saved,

further limiting, the sand blowing space between the vertical sand blocking plate and the sand shooting plate is 3-5 mm.

Further limiting, one side of the sand blowing groove with the sand leaking channel is inclined, and the inclination is 30-45 degrees. The sand can smoothly and quickly fall into the sand blowing groove.

Further limiting, the sand blowing distance between the sand transverse baffle plate and the sand blowing holes in the sand blowing groove is 5-6 cm.

Further inject, still include and press the core board, press the lower bottom surface of core board and install locating pin and stripper bar to the length of stripper bar is shorter than the locating pin, is equipped with the locating hole of fixed locating pin on shooting the sand board, the stripper bar is corresponding with the hole of blowing sand. The core pressing plate is used for demoulding, sand is supplied by molding the sand shooting plate in production, the sand shooting plate is moved away after the precoated sand shell is molded, the core pressing plate is moved, and the demoulding rod penetrates through the sand injection hole to eject out the sand shell under the pushing of the cylinder, so that the precoated sand shell is helped to be separated from the upper male die and the lower female die quickly.

Further inject, the stripper bar is hexagonal column, is convenient for screw up and not hard up with the spanner when installation and take off.

Drawings

FIG. 1 is a schematic view of the three-dimensional structure of the mold with a sand shooting plate during sand blowing molding of the present invention;

FIG. 2 is a schematic view of a main structure of the mold with a sand shooting plate during sand blowing molding;

FIG. 3 is a schematic sectional view taken along the line A in FIG. 2;

FIG. 4 is a schematic structural view of structural connection of a sand injection runner and a precoated sand shell molding;

FIG. 5 is a schematic view of a structural connection three-dimensional structure of a sand injection runner and a precoated sand shell molding;

FIG. 6 is a schematic structural view of the sand shooting plate in front view when a horizontal sand guard and a vertical sand guard are installed;

FIG. 7 is a schematic cross-sectional view taken along line B of FIG. 6;

FIG. 8 is a schematic view of a front-axis-side three-dimensional structure of the sand shooting plate when a horizontal sand baffle and a vertical sand baffle are installed;

FIG. 9 is a schematic perspective view of the sand shooting plate without the horizontal sand guard and the vertical sand guard;

FIG. 10 is a schematic bottom perspective view of the sand shooting plate;

FIG. 11 is a schematic view of a front-axis-side three-dimensional mechanism of a precoated sand shell;

FIG. 12 is a schematic bottom perspective view of the precoated sand shell;

fig. 13 is a schematic view of the three-dimensional structure of the pressurized core plate of the mold of the present invention during demolding;

fig. 14 is a schematic view of the pressure core plate of the mold of the present invention in demolding.

Detailed Description

In order to make the technical solution of the present invention more understandable to those skilled in the art, the following embodiments are further described with reference to the accompanying drawings and examples, and the following examples take a one-mold four-cavity mold to form four precoated sand shells at a time.

The combined precoated sand shell mold suitable for the same sand shooting machine as shown in fig. 1, fig. 2, fig. 3, fig. 4, fig. 5, fig. 11 and fig. 12 comprises a mold workbench 4, a demolding plate 5, a demolding column 6, a lower female mold 7, an upper male mold 8 and a sand shooting plate 1, wherein the demolding plate 5 is installed above the mold workbench 4, the lower end of the demolding column 6 is fixed on the demolding plate 5, the upper end of the demolding column 6 penetrates through the lower female mold 7 to be propped against the formed precoated sand shell 10 (as shown in fig. 4), the upper male mold 8 covers the lower female mold 7 and forms a forming cavity between the upper male mold 8 and the lower female mold, and the upper male mold 8 is provided with a sand injection hole 82.

The sand shooting plate 1 is fixed above the upper male die 8 through two supporting columns 80, a plurality of sand blowing holes 12 are formed in the sand shooting plate 1, the sand blowing holes 12 are opposite to the sand injection holes 82, a sand guide cylinder 81 is connected between the sand blowing holes 12 and the sand injection holes 82, and sand passes through the sand guide cylinder 81 and then enters the sand injection holes 82 when leaking from the sand blowing holes 12.

As shown in fig. 6, 7, 8, 9 and 10, the periphery of the sand shooting plate 1 is provided with fixing holes 11 for fixing a sand blowing cover of a sand core machine, the sand shooting plate 1 is further distributed with sand blowing holes 12 arranged in the inner peripheral range of the fixing holes, that is, the fixing holes 11 are arranged around the four rectangular sides of the sand shooting plate 1, the sand shooting plate 1 is further provided with sand blowing grooves 13, the sand blowing grooves 13 are also provided with sand blowing holes 12, the sand blowing grooves 13 are covered with horizontal sand blocking plates 2, other sand blowing holes 12 except the sand blowing holes 12 in the sand blowing grooves 13 are covered with vertical sand blocking plates 3, the sand blowing grooves 13 are arranged at the front and rear sides of the sand shooting plate 1, and the sand blowing holes 12 are arranged between the two sand blowing grooves 13 at the front and rear sides.

A sand blowing space (shown in figure 1) of 3-5 mm is formed between the sand blowing holes 12 and the vertical sand baffle 3, sand blown out of the sand blowing cover enters the sand blowing holes 12 through the sand blowing space, the sand shooting plate 1 is provided with a ladder 15 which is arranged above the sand blowing groove 13 and is used for installing the transverse sand blocking plate 2, the upper plane of the transverse sand blocking plate 2 and the upper plane of the sand shooting plate 1 are kept horizontal, a sand blowing space of 5-6 cm is arranged between the lower plane of the transverse sand blocking plate 2 and the sand blowing hole 12 in the sand blowing groove 13, and the plane projection area of the sand blowing groove 13 is larger than that of the transverse sand baffle plate 2, when the transverse sand baffle plate 2 is fixed above the sand blowing groove 13, the transverse sand baffle plate is sealed with three sides of the sand blowing groove 13, and the other side of the transverse sand baffle plate is provided with a sand leakage channel leading to a sand blowing hole 12 in the sand blowing groove, one side of the sand blowing groove 13 with the sand leaking channel is inclined, the inclination of the inclined side C is 30-45 degrees, and smooth sand leaking is guaranteed.

When the ladder used for installing the sand transverse blocking plate 2 is machined, the milling machine is used for milling the ladder, the size of the sand transverse blocking plate 2 matched with the ladder is calculated, and the machining is preferably carried out by linear cutting, so that the smaller the gap between the sand shooting plate 1 and the sand transverse blocking plate 2 is, the less sand is easy to flow into the gap between the sand shooting plate 1 and the sand transverse blocking plate 2. The lower bottom surface of the sand transverse baffle plate 2 is drilled with two threaded blind holes, the ladder is drilled with threaded through holes, the sand transverse baffle plate 2 is screwed up from the lower bottom surface of the sand shooting plate 1 by screws when being installed, thereby ensuring the flatness of the upper plane of the sand transverse baffle plate 2, a sand blowing cover of a sand core machine is convenient to install on the sand shooting plate 1, basically, after the sand blowing cover is fixed by screws, the edge of the sand blowing cover is pressed against part of the sand transverse baffle plate 2, which is the reason of the change of the specification and the size of the sand shooting plate 1 and the mould, after the sand blowing cover is fixed, a sand blowing space is formed between the sand blowing cover and the sand shooting plate 1, the sand blowing cover is also rectangular, sand is blown to the middle of the sand shooting plate 1 from the falling positions of four corners, sand enters the sand blowing holes 12 from the gap below the vertical sand baffle plate 3, sand leakage channels also enter the sand blowing grooves 13, and then enters the sand blowing holes 12 simultaneously supply sand to the mould cavity below the sand shooting plate, and is coagulated to form a precoated sand shell.

In this embodiment, four sand blowing holes are provided during the molding of a precoated sand shell, then 16 sand blowing holes 12 are provided during the molding of four precoated sand shells in four cavities of a mold, two sand blowing holes 12 arranged in a sand blowing groove 13 are blocked below a horizontal sand blocking plate 2, two sand blowing holes 12 are also blocked below a vertical sand blocking plate 3, the two sand blowing holes 12 under the vertical sand blocking plate are longitudinally arranged in the front and back positions, four sand blowing grooves 13 are provided on a sand shooting plate, four horizontal sand blocking plates 2 are respectively covered on the vertical sand blocking plate 3, four vertical sand blocking plates 3 are also provided, the four vertical sand blocking plates 3 are clamped in the middle positions by the four horizontal sand blocking plates 2 arranged in the front and back directions, one vertical sand blocking plate 3 is utilized in every two sand blowing holes 12, and the two ends of the vertical sand blocking plates 3 are movably connected on the sand shooting plate 1 through screws.

It should be noted that the positions of the sand-blasting holes 12 are not limited to the arrangement method in the design, and the horizontal sand-blocking plate 2 and the vertical sand-blocking plate 3 are not limited to the arrangement mode, as long as the distance between the sand-blasting holes 12 and the inner wall of the sand-blasting cover is at least 25mm, the stacking angle is 19 degrees, the height distance between the vertical sand-blocking plate 3 and the sand-blasting holes 12 or the height distance between the horizontal sand-blocking plate 2 and the sand-blasting holes 12 is ensured, and the height distance is calculated by the known data that the stacking angle is about 19 degrees. In addition, the design has a range for the size and specification changes of the mold and the sand shooting plate, basically, the length of the single plate of the mold and the sand shooting plate is changed by about 5 mm-10 mm, and the design is suitable for forming precoated sand shell molds of different specifications and sizes of the same product.

The design is based on the usage of the precoated sand shell during sand blowing, the precoated sand shell needs to be demolded after molding, the sand blowing cover needs to be removed during demolding, demolding is carried out by means of the core pressing plate 9 during demolding, the positioning pin 90 and the demolding rod 91 are installed on the lower bottom surface of the core pressing plate 9, the length of the demolding rod 91 is shorter than that of the positioning pin 90, the positioning hole for fixing the positioning pin 90 is formed in the sand shooting plate 1, and the demolding rod 91 corresponds to the sand blowing hole 12. During demoulding, the core pressing plate 9 moves downwards under the action of the air cylinder, and the demoulding rod 91 needs to go deep into the sand injection hole 82 to push out the lower precoated sand shell 10 downwards.

When the precoated sand shell is formed, a sand blowing cover of a sand core machine is connected in a fixing hole through screws and then installed on the sand shooting plate 1, after installation, the width of the inner wall of the sand blowing cover away from a sand blowing hole 12 is at least 25mm, under the condition of the sand blowing interval, sand is blown into the sand blowing hole 12, sand enters a sand guide cylinder 81 from the sand blowing hole 12, then enters a forming cavity between a lower female die 7 and an upper male die 8 and is gradually accumulated into the precoated sand shell, after forming, the sand blowing cover stops supplying sand, sand on the sand shooting plate 1 forms an accumulation angle of 19 degrees, and the sand stops falling.

As shown in fig. 13 and 14, when the sand shell of the formed precoated sand is demolded, the sand shooting plate and the sand guide cylinder are removed, and the core pressing plate is moved to be positioned above the upper male die 8, so that the demolding rod is aligned with the sand injection hole 82, and the positioning pin 90 is aligned with the positioning hole. Next, the lower concave die 7 moves downwards for demoulding, the demoulding plate 5 is not moved, the lower concave die 7 moves downwards, and the demoulding column 6 ejects out the precoated sand shell upwards. Afterwards, the core pressing plate 9 is pressed downwards, the demolding rod 91 pushes downwards from the position of the sand injection hole 82, the precoated sand shell 10 is ejected downwards, the core pressing plate 9 and the demolding rod 91 are designed to help the precoated sand shell 10 to be rapidly demolded, the sand injection pins of the precoated sand shell 10 are prevented from being broken, the precoated sand shell is prevented from being broken, the integrity of the precoated sand shell 10 is ensured, and the forming quality is improved.

It is right above the utility model provides a combined tectorial membrane sand shell mould suitable for same sand shooting machine has carried out detailed introduction, and the description of specific embodiment is only used for helping understanding the utility model discloses a method and core thought thereof. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, the present invention can be further modified and modified, and such modifications and modifications also fall within the protection scope of the appended claims.

Claims (7)

1. The combined precoated sand shell mold suitable for the same sand ejector comprises a mold workbench, a stripper plate, a stripping column, a lower female mold and an upper male mold, wherein the stripper plate is arranged above the mold workbench, the lower end of the stripping column is fixed on the stripper plate, the upper end of the stripping column penetrates through the lower female mold and is propped against the formed precoated sand shell, the upper male mold covers the lower female mold, a forming cavity is formed between the upper male mold and the lower female mold, and the upper male mold is provided with a sand injection hole;

the method is characterized in that: the sand shooting plate is fixed above the upper male die through a support column, a plurality of sand blowing holes are arranged on the sand shooting plate, the sand blowing holes are opposite to the sand injection holes, a sand guide cylinder is connected between the sand blowing holes and the sand injection holes,

the sand blasting machine is characterized in that fixing holes for fixing a sand blowing cover of a sand core machine are arranged on the peripheral edge of the sand shooting plate, the sand blowing holes are arranged in the inner peripheral range of the fixing holes, a sand blowing groove is further formed in the sand shooting plate, a transverse sand blocking plate is covered on the sand blowing groove, sand blowing holes are distributed in the sand blowing groove in the same manner, longitudinal sand blocking plates are covered on other sand blowing holes for removing the sand blowing holes in the sand blowing groove, sand blowing intervals are formed between the sand blowing holes and the longitudinal sand blocking plates and between the sand blowing groove and the transverse sand blocking plate, and sand blown out from the sand blowing cover enters the sand blowing holes through the sand blowing intervals.

2. The combined precoated sand shell mold applicable to the same sand shooting machine as claimed in claim 1, wherein: the front and back both sides position of shooting plate is arranged in to the crosspiece sand board, indulge to keep off the sand board and arrange in between two crosspiece sand boards, be equipped with on the shooting plate and arrange in the ladder that blows sand groove top is used for installing the crosspiece sand board, the last plane of crosspiece sand board keeps the level with the last plane of shooting plate, has the sand-blowing interval between the lower plane of crosspiece sand board and the last plane of hourglass sand hole to the plane projection area of blowing sand groove is greater than the plane projection area of crosspiece sand board, and the crosspiece sand board is fixed when blowing sand groove top and is left the hourglass sand passageway that leads to the blowing sand hole with the wherein trilateral of blowing sand groove, the another side.

3. The combined precoated sand shell mold applicable to the same sand shooting machine as claimed in claim 2, wherein: and the sand blowing space between the longitudinal sand blocking plate and the sand shooting plate is 3-5 mm.

4. The combined precoated sand shell mold applicable to the same sand shooting machine as claimed in claim 2, wherein: one side of the sand blowing groove with the sand leaking channel is inclined, and the inclination is 30-45 degrees.

5. The combined precoated sand shell mold suitable for the same sand shooting machine as claimed in claim 4, wherein: and the sand blowing distance between the transverse sand blocking plate and the sand blowing holes in the sand blowing groove is 5-6 cm.

6. The combined precoated sand shell mold applicable to the same sand shooting machine as claimed in claim 1, wherein: the sand shooting plate is characterized by further comprising a core pressing plate, a positioning pin and a demolding rod are mounted on the lower bottom surface of the core pressing plate, the length of the demolding rod is shorter than that of the positioning pin, a positioning hole for fixing the positioning pin is formed in the sand shooting plate, and the demolding rod corresponds to the sand blowing hole.

7. The combined precoated sand shell mold suitable for the same sand shooting machine as claimed in claim 6, wherein: the demoulding rod is in a hexagonal column shape.

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