CN211614220U

CN211614220U - Novel casting riser sand sleeve and riser

Info

Publication number: CN211614220U
Application number: CN201922243942.3U
Authority: CN
Inventors: 赵恩亮; 李霞; 刘晓
Original assignee: Jiangyin Machine Building Co ltd
Current assignee: Jiangyin Machine Building Co ltd
Priority date: 2019-12-13
Filing date: 2019-12-13
Publication date: 2020-10-02
Anticipated expiration: 2029-12-13

Abstract

The utility model discloses a new-type foundry rising head sand cover and rising head, rising head sand cover sets up on the foundry goods psammitolite, rising head sand cover includes sand cover body, and sand cover body includes top surface and first annular side, is equipped with the separator that extends to the top surface direction by the opening in the sand cover body, and the separator is used for cutting apart the inner space of sand cover body into two cavitys that can hold the molten iron, is equipped with the platform between separator and the top surface inner wall, and the left and right sides face of platform is the inclined plane; the top surface is provided with an opening penetrating through the platform to the separating piece, the opening is used for accommodating the heating block, and one end of the separating piece, far away from the platform, is aligned and attached to the isolating piece in the casting sand core; the riser comprises a first riser and a second riser which are oppositely arranged on the left and right sides, and a preset distance is kept between the first riser and the second riser. The utility model provides a casting rising head that new-type casting rising head sand cover formed after the pouring, its feeding is effectual, saves space, conveniently gets rid of, and the foundry goods product does not have shrinkage porosity class defect to improve the yield of products.

Description

Novel casting riser sand sleeve and riser

Technical Field

The utility model relates to a rising head design field especially relates to a new-type casting rising head sand cover and rising head.

Background

Most of the traditional casting risers are provided with a riser neck, so that the defects of low riser feeding efficiency and large occupied space exist; there are also a few risers that use one riser with two or more riser necks, but such risers are extremely difficult to remove because the multiple riser necks are tied to one another. When 2 risers are needed, the volume of the two risers is about 1/3 larger than that of one riser, so that the yield is reduced; the edge of the side surface of the riser is too close to the casting, and the riser is essentially high-temperature molten iron, so that the local heat section of the casting is increased, and the risk of shrinkage porosity of the casting is increased; the diameter of a central hole of some products is smaller, and 2 risers cannot be placed at the same time.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that exists among the prior art, the utility model provides a new-type casting rising head sand cover and rising head to improve the yield of cast product, technical scheme as follows:

the utility model provides a novel casting riser, the riser sand sleeve is arranged on the casting sand core, the riser sand sleeve comprises a sand sleeve body, the sand sleeve body comprises a top surface and a first annular side surface arranged around the top surface, the first annular side surface is connected with the top surface to form an integral structure and surrounds to form a space with an opening, and the end part of the first annular side surface, which is far away from the top surface, is arranged on the casting sand core;

a separating piece extending from the opening to the top surface is arranged in the sand sleeve body, the separating piece is used for separating the inner space of the sand sleeve body into two independent cavities, a platform is arranged between the separating piece and the inner side wall of the top surface of the sand sleeve body, the platform and the separating piece form a continuous structure, and the left side surface and the right side surface of the platform are inclined surfaces; the top surface is provided with an opening penetrating through the platform to the partition, the opening is used for containing the heating block, and one end, far away from the platform, of the partition is aligned and attached to the partition in the casting core.

Furthermore, an anti-rotation core head is arranged outside the annular side face of the riser sand sleeve, and a groove matched with the anti-rotation core head is formed in the casting sand core.

Further, the riser sand sleeve is of a circular truncated cone structure, and the diameter of the circular truncated cone structure is gradually increased from the top surface to the bottom.

Further, the thickness of the separator extending from the top surface to the lower portion is gradually reduced, so that both left and right side surfaces of the separator are inclined outward at both angles of 1 to 2 °, and the thickness range of the lower end of the separator is set to 4mm to 5 mm.

Furthermore, the sand thickness ranges of the first annular side surface and the top surface of the riser sand sleeve are set to be 8-10 mm.

The utility model provides a casting rising head, the casting rising head is formed through the molten iron pouring by foretell new-type casting rising head sand cover, the foundry goods psammitolite forms the foundry goods, relative first rising head and the second rising head that sets up about the rising head is including, keep predetermined interval between first rising head and the second rising head, first rising head and second rising head all have relative up side and the downside that sets up from top to bottom and center on the second ring side and the plane side that up side and downside set up, be provided with the inclined plane between up side and the plane side.

Further, the downside of first rising head and second rising head all be provided with the riser neck that the foundry goods is connected, the foundry goods psammitolite has the centre bore, and centre bore department is provided with the spacing block that corresponds with the riser sand cover, the spacing block is used for separating the foundry goods psammitolite for two first cavities, the cavity one-to-one in first cavity and the riser sand cover, the riser neck is formed by molten iron pouring to first cavity in.

Further, first rising head and second rising head are half round platform structure, just first rising head and second rising head mirror symmetry.

Further, the vertical section formed by the inclined plane of the first riser and the inclined plane of the second riser is of a V-shaped structure or a trapezoidal structure.

The utility model provides a beneficial effect that technical scheme brought as follows:

the utility model provides a casting rising head that new-type casting rising head sand cover formed after the pouring, its feeding is effectual, saves space, conveniently gets rid of, and makes the foundry goods product do not have shrinkage porosity class defect, improves the yield of foundry goods product.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a cross-sectional view of a new foundry riser sand jacket and casting sand core combination provided by an embodiment of the present invention;

fig. 2 is a bottom view of the novel casting riser sand sleeve provided by the embodiment of the invention;

fig. 3 is a perspective structural view of the novel casting riser according to the embodiment of the present invention;

fig. 4 is a cross-sectional view of a new casting riser provided by an embodiment of the present invention;

figure 5 is a top view of a casting sand core provided by an embodiment of the present invention.

Wherein the reference numerals include: 1-riser sand jacket, 11-top face, 12-first annular side face, 13-opening, 14-separating piece, 15-platform, 16-heating block, 17-anti-rotation core head, 18-opening hole, 2-casting sand core, 21-center hole, 22-isolating piece, 23-first cavity, 24-second cavity, 25-groove, 3-riser, 31-first riser, 32-second riser, 4-planar side face, 5-inclined face and 6-riser neck.

Detailed Description

In order to make the technical solution of the present invention better understood, the technical solution of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, apparatus, article, or device that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or device.

In an embodiment of the present invention, a new casting riser sand sleeve is provided, referring to fig. 1 and 2, the riser sand sleeve 1 is disposed on a casting sand core 2, the riser sand sleeve and the casting sand core are both made of precoated sand, the riser sand sleeve 1 includes a sand sleeve body, the sand sleeve body includes a top surface 11 and a first annular side surface 12 disposed around the top surface 11, the first annular side surface 12 is connected with the top surface 11 to form an integral structure and surrounds to form a hollow space with an opening 13, and one side of the first annular side surface 12 away from the top surface 11 is connected with the casting sand core 2; the riser sand sleeve 1 has the following structure: the riser sand sleeve 1 is of a circular truncated cone structure, the diameter of the circular truncated cone structure from top to bottom is gradually increased, and when the riser sand sleeve 1 is placed on the casting sand core 2, the diameter of the end part, close to the casting sand core 2, of the riser sand sleeve 1 is large, so that the riser sand sleeve is more stable. The sand thickness range of the first annular side surface and the top surface of the riser sand sleeve 1 is set to be 8-10 mm.

The separator 14 has the following specific structure: referring to fig. 1 and 2, a partition 14 extending from an opening 13 to a top surface 11 is disposed in the sand sleeve body, and the partition 14 is used for dividing an inner space of the sand sleeve body into two independent cavities, and molten iron can be introduced into the cavities during casting. The riser sand sleeve is characterized in that a platform 15 is arranged between the separating piece 14 and the inner side wall of the top surface 11 of the sand sleeve body, the platform 15 is connected with the separating piece 14, the separating piece is not in direct contact with the inner wall of the top surface, the center of the riser sand sleeve is separated by the separating piece (the thickness range of the lower end of the separating piece is set to be 4-5 mm, and the separating piece is composed of precoated sand), after pouring, the separating piece is scattered, a riser can be divided into two parts, meanwhile, the separating piece can form a sharp corner effect during pouring, the heat of the riser is increased, the center of the riser is not easy to. The left side face and the right side face of the platform 15, which are connected with the separating part 14, are inclined faces, the vertical section of the platform 15 is of a V-shaped or trapezoidal structure, after molten iron is poured, riser sand sleeves become two separated risers, a notch is formed in the position of the platform 15, the notch is of a V-shaped or trapezoidal structure and corresponds to the shape of a hydraulic clamp, and the riser is conveniently clamped and broken by the hydraulic clamp.

The concrete structure of the casting sand core is as follows: the casting sand core comprises a plurality of sand cores, the plurality of sand cores are combined together to form a casting inner cavity of a product, referring to fig. 5, a central hole 21 is formed in the center of the casting sand core 2, a spacer 22 corresponding to the riser sand sleeve is arranged at the central hole (if the width, namely the thickness, of the spacer is 4mm, the width, namely the thickness, of the spacer is also 4mm), the middle position of the casting sand core is divided into two first cavities 23 by the spacer 22, and the first cavities correspond to the cavities in the riser sand sleeve one by one; the end parts of the two first cavities far away from the spacer are respectively provided with a second cavity 24 with a smaller volume, the distances from the second cavity 24 to the spacer 22 are equal, and when the riser sand sleeve is placed on the casting sand core, the end part of the riser sand sleeve corresponds to the second cavity.

One end of the separator 14, which is far away from the platform 15, is aligned and attached with the spacer in the casting sand core 2, an anti-rotation core head 17 is arranged outside the annular side surface of the riser sand sleeve 1, the anti-rotation core head 17 is arranged at the bottom of the riser sand sleeve 1, referring to fig. 1 and fig. 2, a groove 25 matched with the anti-rotation core head 17 is arranged on the casting sand core 2, when the riser sand sleeve is combined with the casting sand core, the anti-rotation core head is arranged in the groove 25 of the casting sand core 2, so that the positioning is convenient, the assembly of the riser sand sleeve and the casting sand core is convenient, on the one hand, the separator 14 in the sand sleeve body is aligned and attached with the spacer in the casting sand core 2 (the center position of the casting sand core 2 is provided with the spacer, when the riser sand sleeve is assembled with the casting sand core, the separator 14 in the riser sand sleeve is aligned with the spacer in the casting sand core 2, so that the riser sand sleeve is arranged at the, and the riser sand sleeve can be prevented from being separated from the casting sand core. Due to the problem of mold stripping, the riser sand sleeve and the casting sand core cannot be manufactured into one sand core, the riser sand sleeve and the casting sand core can only be manufactured respectively, and in order to prevent the separator 14 in the riser sand sleeve and the separator in the casting sand core 2 from being not aligned well in the combination process, the rotation preventing core head 17 is specially arranged. In addition, the assembly can rotate, the anti-rotation core heads 17 are additionally arranged, the alignment can be ensured, and the later pouring process is ensured so that the whole riser can be smoothly divided into 2 risers.

The thickness that separator 14 extends from top surface 11 to the lower part reduces gradually for the left and right sides of separator 14 all leans out, and the inclination angle scope is 1-2 (the angle is the angle that left and right sides face deviates from the middle part axial lead), as shown in fig. 1, the contained angle that forms between the left surface or the right flank of separator 14 and the vertical face only sets up the inclination and can the drawing, all must have the drawing inclination when forming the psammitolite, is convenient for make the rising head psammitolite smoothly for the core-making process.

An opening 18 penetrating through the platform 15 from the top surface to the partition is formed in the top surface 11, a heating block 16 is arranged in the opening 18, the shape of the opening 18 is determined by the shape of the heating block, the heating block heats molten iron, and the heating block is used for increasing feeding efficiency of a riser and avoiding riser capping; the heating block is placed, the temperature of molten iron in the riser sand sleeve is higher than that of the lower part (casting), so that the molten iron can be conveniently fed downwards, and the molten iron is solidified at low temperature for casting. The trompil cross section is circular, and trompil 18 is round platform shape structure, reduces gradually from the decurrent diameter of top surface, and the later stage molten iron pouring of being convenient for forms V-arrangement structure, and then facilitates the use hydraulic tong pincers dead head of breaking.

In another embodiment of the present invention, a new casting riser formed by the above riser sand sleeve after molten iron pouring is provided, referring to fig. 3 and 4, the riser sand sleeve is combined with the casting sand core, and then the molten iron is poured into the cavity (the inner cavity of the riser sand sleeve is communicated with the inner cavity of the casting sand core, which is called as cavity), the pouring is performed only once, after the pouring, the riser sand sleeve forms a riser, and the casting sand core forms a casting.

The concrete structure of rising head 3 is as follows: the riser 3 that forms after the pouring includes the relative first riser 31 and the second riser 32 that set up about, keep predetermined interval between first riser 31 and the second riser 32, through the pouring back, the grit of separator and platform is collapsed, has formed the interval, makes the riser 3 separates and forms first riser 31 and second riser 32, first riser 31 and second riser 32 are half round platform structure, just first riser 31 and second riser 32 mirror symmetry, and two risers's shape is the same promptly. If the riser sand sleeve 1 is in a circular truncated cone structure, the manufactured riser is in a circular truncated cone structure.

First rising head 31 and second rising head 32 all have relative up side and the downside that sets up from top to bottom and center on go up the second annular side (second annular side is half of first annular side, and the shape is corresponding) and plane side 4 that side and downside set up, it is provided with inclined plane 5 to go up between side and the plane side 4, inclined plane 5 by platform 15 and the heating block of rising head sand cover 1 form after the molten iron pouring, the vertical cross-section that forms between inclined plane 5 of first rising head 31 and the inclined plane 5 of second rising head 32 is V-arrangement structure or trapezium structure, and is corresponding with the shape of hydraulic tong, facilitates the use hydraulic tong disconnected rising head.

The concrete structure of the riser neck is as follows: the lower sides of the first riser 31 and the second riser 32 are provided with riser necks 6 connected with the castings, and the riser necks are formed as follows: the casting sand core 2 is provided with a spacer corresponding to the riser sand sleeve, the spacer divides the middle position of the casting sand core into two first cavities, the end parts, far away from the spacer, of the two first cavities are provided with a second cavity with a smaller volume, the distance from the second cavity to the spacer is equal, after the riser sand sleeve and the casting sand core are combined, the riser neck is formed by pouring molten iron into the second cavity, and each riser after pouring is provided with a riser neck respectively. The two riser necks can be fed to a larger area, and the area of a single riser neck can be reduced; only one riser can feed one area, two risers can feed two areas, and the two risers can feed the position which can be fed by the two risers before, only one riser is needed and two riser necks are arranged; in addition, the removal is also convenient.

A sharp corner is formed between the riser neck and the riser, and when the riser is removed, the sharp corner is a stress concentration point, so that the riser can be conveniently disconnected from the sharp corner; the fracture exists between the two risers and the casting, the fracture is generally not regular plane fracture and can extend towards the direction of the casting product, the purpose of the riser neck is to arrange a buffer area between the fracture and the casting, and when the riser is removed by a tool after molten iron pouring, the riser is fractured and extends on the riser neck without damaging the casting product. And after the dead head is removed, the riser neck is remained on the casting because the riser neck is connected with the casting, and then the riser neck is removed by polishing or machining, so that a casting product is finally obtained.

After normal molten iron is poured into a cavity (a cavity inside the riser sand sleeve is communicated with a cavity inside the casting sand core and is called as a cavity, the molten iron firstly enters a casting sand core at the lower part to fill the cavity inside the casting sand core and then overflows to the cavity inside the riser sand sleeve), the temperature of the molten iron can be solidified to room temperature from 1400 ℃, the density is low in a high-temperature state and high in a solid state, but the volume of the cavity is fixed, under a normal condition, the inside of a casting product can have defects of holes, and through the arrangement of the riser sand sleeve, when the casting is solidified and contracted, the molten iron can be supplemented into the casting from the riser, so that the final casting product has no defects of holes. In addition, the riser is arranged so that a casting product is not loosened, the riser is essentially high-temperature molten iron, the edge of the side surface of the riser is too close to the casting, the local heat section of the casting is increased, and the risk of loosening of the casting is increased.

The novel casting riser provided by the utility model occupies small space, 2 areas of one riser pipe (equivalent to the effect of two risers before using the original 1.5 times capacity) have small casting size and no space for adding two risers, and one riser has two riser necks and has obvious advantages; the top of the riser is designed in a V shape or a trapezoid shape, so that hydraulic pliers are convenient to use to clamp and break the riser.

The utility model provides a production method of foundry goods product, it includes following step:

s1, manufacturing the riser sand sleeve and the casting sand core, and placing a heating block on the riser sand sleeve;

s2, gluing the riser sand sleeve on the casting sand core, wherein the anti-rotation core head of the riser sand sleeve is arranged in the corresponding matching groove of the casting sand core, so that the bottom of the separator in the riser sand sleeve is aligned with the upper part of the separator in the casting sand core;

s3, pouring high-temperature molten iron (1350-1450 ℃) into a cavity in the casting sand core and the riser sand sleeve, wherein the molten iron firstly enters the casting sand core at the lower part to fill the cavity in the casting sand core, then overflows to the upper part to the cavity in the riser sand sleeve, the riser is formed by the riser sand sleeve after pouring, the casting sand core forms a casting, and two riser necks are formed at the joint of the riser and the casting;

and S4, cutting off the riser through hydraulic pliers, and then removing the riser neck through grinding or machining to obtain the final casting product.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. The novel casting riser sand sleeve is characterized in that the riser sand sleeve (1) is arranged on a casting sand core (2), the riser sand sleeve (1) comprises a sand sleeve body, the sand sleeve body comprises a top surface (11) and a first annular side surface (12) arranged around the top surface (11), the first annular side surface (12) is connected with the top surface (11) to form an integral structure and surrounds to form a space with an opening (13), and the end part, far away from the top surface (11), of the first annular side surface (12) is arranged on the casting sand core (2);

a partition (14) extending from an opening (13) to the top surface (11) is arranged in the sand sleeve body, the partition (14) is used for dividing the inner space of the sand sleeve body into two independent cavities, a platform (15) is arranged between the partition (14) and the inner side wall of the top surface (11) of the sand sleeve body, the platform (15) and the partition (14) form a continuous structure, and the left side surface and the right side surface of the platform (15) are inclined surfaces; the top surface (11) is provided with an opening (18) penetrating through the platform (15) to the partition (14), the opening (18) is used for accommodating the heating block (16), and one end, far away from the platform (15), of the partition (14) is aligned and attached to the partition (22) in the casting sand core (2).

2. The novel foundry riser sand sleeve as claimed in claim 1, characterized in that an anti-rotation core print (17) is arranged outside the annular side surface of the riser sand sleeve (1), and a groove (25) matched with the anti-rotation core print (17) is arranged on the casting sand core (2).

3. The novel casting riser sand sleeve as claimed in claim 1, wherein the riser sand sleeve (1) is of a circular truncated cone structure, and the diameter of the circular truncated cone structure gradually increases from the top surface to the bottom.

4. The new foundry riser sanding sleeve according to claim 1, characterized in that the partition (14) has a thickness that gradually decreases from the top surface (11) towards the lower part, so that both the left and right sides of the partition (14) are inclined outwards, both at an angle of 1-2 °, and the lower end of the partition (14) has a thickness in the range of 4-5 mm.

5. The new foundry feeder sand sleeve according to claim 1, characterized in that the sand thickness of the first annular side surface and the top surface of the feeder sand sleeve (1) are both set in the range of 8-10 mm.

6. The new foundry riser sand sleeve as recited in any one of claims 1 to 5, characterized in that the casting sand core (2) has a central hole (21), a spacer (22) corresponding to the riser sand sleeve is arranged at the central hole (21), the spacer (22) is used for dividing the casting sand core into two first cavities (23), and the first cavities (23) correspond to the cavities in the riser sand sleeve one by one.

7. A casting riser, characterized in that, the casting riser is by the new-type casting riser sand cover (1) of claim 6 through the molten iron pouring formation, foundry sand core (2) forms the foundry goods, riser (3) are including controlling relative first riser (31) and the second riser (32) that set up, keep predetermined interval between first riser (31) and the second riser (32), first riser (31) and second riser (32) all have relative up side and the downside that sets up from top to bottom and center on the second annular side and the plane side (4) that the up side and downside set up, be provided with inclined plane (5) between up side and the plane side (4).

8. Casting riser according to claim 7, characterized in that the lower sides of said first riser (31) and of said second riser (32) are each provided with a riser neck (6) connected to said casting, said riser neck (6) being formed by pouring molten iron into said first cavity (23).

9. The casting riser as claimed in claim 7, characterized in that said first riser (31) and said second riser (32) are both of semi-frustoconical configuration, and in that said first riser (31) and said second riser (32) are mirror-symmetrical.

10. The casting riser as claimed in claim 7, characterized in that the inclined surface (5) of the first riser (31) and the inclined surface (5) of the second riser (32) form a V-shaped or trapezoidal structure in vertical section.