CN210412487U

CN210412487U - Special dark chill of psammitolite

Info

Publication number: CN210412487U
Application number: CN201921049149.3U
Authority: CN
Inventors: 杨天祥; 陈晓群; 许立玉; 李冠昕; 施闵雄; 何金鹏; 丁成才; 马俊杰
Original assignee: Ningbo Yongxiang Casting Co ltd
Current assignee: Ningbo Yongxiang Casting Co ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-04-28
Anticipated expiration: 2029-07-05

Abstract

The utility model discloses a special dark chill of psammitolite, including the chill body, the chill body be upper portion open-ended cylindricly, the lateral surface interval of chill body be provided with a plurality of recesses, a plurality of recesses follow the equidistance setting of the circumferencial direction of the lateral surface of chill body, every the recess run through the length direction of chill body. When making core, the dark chill is placed in the inner side of core box, and is filled with resin sand to make it compact, and when stripping the mould, the dark chill is taken out together with sand core. The dark chill plays the role of a chill and a core bar, and the strength of the sand core is increased. In the process of casting and producing tubular castings, the dark chill has a chilling effect on the tube wall, and promotes the simultaneous solidification of molten iron. The utility model discloses special dark chill of psammitolite can effectively solve defects such as shrinkage cavity, shrinkage porosity of tubulose foundry goods side pipe walls such as hydro-cylinder, cylinder block, penetrating head, can promote the appearance quality on foundry goods inner chamber surface simultaneously, guarantees the whole quality of foundry goods.

Description

Special dark chill of psammitolite

Technical Field

The utility model relates to a casting technical field specifically is a special dark chill of psammitolite with indirect chill of shaping.

Background

For tubular castings such as oil cylinders, cylinder bodies and spray heads, the use characteristics of the castings are that pressure and sealing requirements are met during use, the requirements for the quality of the inner surfaces of the castings are high, and the castings required to be processed do not have any casting defects. In the process design, the use surface or important positions of the product are generally designed on the side wall of the pipe hole, the appearance outline of the product is of a tubular or similar structure, and the height is high, so that the pouring system is designed to enter water from the bottom, and the whole upper-end pipe orifice is finally solidified. When the open riser or the side riser is used, the feeding is incomplete or the feeding distance is insufficient, casting defects are easily generated on the pipe wall of the casting, appearance (VT) detection cannot be found visually, and the arc-shaped surface on the casting is not beneficial to Ultrasonic (UT) detection. If defects are found after processing, castings are scrapped, and the casting defects belong to the problems which are easy to appear in the process and difficult to solve. If use the direct chill of special shaping of fritter, the operation difficulty influences foundry goods inner wall outward appearance roughness, and follow-up inner wall is polished the difficulty, and the difficult sand that packs in the chill clearance is compacter simultaneously, easily appears the shrinkage porosity defect, and the chill frequency of use is low, and the use amount is big, and is with high costs, also produces certain burden to the chill management and control.

The size of the cold iron is not accurate and can not completely accord with the process size due to the fact that the opening size and the shape of the cold iron are affected by temperature mutation caused by overheating and supercooling of the formed direct cold iron in the using process, and finally, a casting is defective or scrapped.

Disclosure of Invention

The utility model aims to solve the technical problem that, to prior art not enough, provide a special dark chill of psammitolite, this dark chill can effectively solve defects such as shrinkage cavity, shrinkage porosity of tubular casting side pipe walls such as hydro-cylinder, cylinder block, penetrating head, can promote the appearance quality on casting inner chamber surface simultaneously, guarantees the whole quality of foundry goods.

The utility model provides a technical scheme that above-mentioned technical problem adopted does: the utility model provides a special dark chill of psammitolite, includes the chill body, the chill body be upper portion open-ended cylindricly, the lateral surface interval of chill body be provided with a plurality of recesses, a plurality of recesses along the circumferencial direction of the lateral surface of chill body set up at equal intervals, every the recess run through the length direction of chill body.

The utility model discloses the dark chill is the special dark chill of psammitolite. When making core, the dark chill is placed in the middle of the inner side of the core box and is filled with resin sand to be compact, and the dark chill is taken out along with the sand core when stripping. The dark chill plays the role of a chill and a core bar, and the strength of the sand core is increased. In the process of casting and producing tubular castings, the dark chill has a chilling effect on the tube wall, and promotes the simultaneous solidification of molten iron. The utility model discloses special dark chill of psammitolite can effectively solve defects such as shrinkage cavity, shrinkage porosity of tubulose foundry goods side pipe walls such as hydro-cylinder, cylinder block, penetrating head, can promote the appearance quality on foundry goods inner chamber surface simultaneously, guarantees the whole quality of foundry goods.

The plurality of grooves arranged on the outer side surface of the chiller body at intervals can reduce stress deformation, improve the use times of the dark chiller, reduce the casting production cost, effectively eliminate the thermal stress failure effect, contribute to the heat dissipation of the dark chiller and play a good chilling effect. In addition, a plurality of recesses constitute concave-convex structure at the lateral surface of chiller body, make things convenient for resin sand cladding dark chiller, play better sand hanging effect, avoid dark chiller to drop in the production process.

Preferably, the distance between two adjacent grooves along the circumferential direction of the outer side surface of the chilling block body is 25-100 mm.

Preferably, the outer diameter of the chilling block body is 40-100 mm smaller than the diameter of the inner side surface of the matched core box. During core making, the distance between the outer side surface of the chilling block body and the inner side surface of the matched core box is 20-50 mm, so that the chilling effect of the dark chilling block can be ensured, and the quality of a casting can be ensured.

Further, the chill body comprises a large-diameter part and a small-diameter part which are coaxially and integrally arranged up and down, the plurality of grooves comprise a plurality of first grooves and a plurality of second grooves, the plurality of first grooves are arranged along the circumferential direction of the outer side surface of the large-diameter part at equal intervals, each first groove penetrates through the length direction of the large-diameter part, the plurality of second grooves are arranged along the circumferential direction of the outer side surface of the small-diameter part at equal intervals, and each second groove penetrates through the length direction of the small-diameter part. Because the bottom is mostly adopted to enter water when the ductile iron product is poured, the pipe orifice at the upper end is solidified at last, and the design of the large-diameter part and the small-diameter part can ensure that the whole casting achieves the effect of simultaneous cooling, thereby ensuring the whole quality of the casting.

Preferably, a tapered portion is coaxially and integrally provided between the large diameter portion and the small diameter portion, the tapered portion has a smooth surface, the outer diameter of the large diameter end of the tapered portion is larger than that of the large diameter portion, the outer diameter of the small diameter end of the tapered portion is larger than that of the small diameter portion, the large diameter end of the tapered portion is connected with the large diameter portion, and the small diameter end of the tapered portion is connected with the small diameter portion. The setting of toper portion helps directly taking out the dark chill after unpacking, reduces the work load that follow-up clearance was polished to further reduction in production cost improves production efficiency.

Preferably, the upper part of the inner wall of the chilling block body is provided with a plurality of hanging handles or a plurality of hanging holes. Furthermore, a hanging handle is arranged on the upper portion of the inner wall of the chilling block body in a crossing mode, and two ends of the hanging handle are respectively fixed to the inner wall of the chilling block body. The arrangement of the hanging handle or the hanging hole is convenient for hanging and safe operation.

Compared with the prior art, the utility model has the advantages of as follows: the utility model discloses a special dark chill of psammitolite, during the system core, arrange this dark chill in the core box inboard, it is tight real to fill with the resin sand, takes out the dark chill along with the psammitolite during the drawing. The dark chill plays the role of a chill and a core bar, and the strength of the sand core is increased. In the process of casting and producing tubular castings, the dark chill has a chilling effect on the tube wall, and promotes the simultaneous solidification of molten iron. The utility model discloses special dark chill of psammitolite can effectively solve defects such as shrinkage cavity, shrinkage porosity of tubulose foundry goods side pipe walls such as hydro-cylinder, cylinder block, penetrating head, can promote the appearance quality on foundry goods inner chamber surface simultaneously, guarantees the whole quality of foundry goods.

Drawings

FIG. 1 is an external view of a dark chill in an example;

FIG. 2 is a front view of the dark chiller in the embodiment;

FIG. 3 is a schematic diagram showing the relative positions of the dark chill and the core box in the embodiment during core making.

Detailed Description

The present invention will be described in further detail with reference to the following embodiments.

The special dark chill of psammitolite of embodiment, as shown in the figure, including chill body 1, chill body 1 is upper portion open-ended cylindricly, and the lateral surface interval of chill body 1 is provided with a plurality of recesses, and a plurality of recesses set up along the circumferencial direction of the lateral surface of chill body 1 equidistance, along the circumferencial direction of the lateral surface of chill body 1, and the distance between two adjacent recesses is 25 mm, and every recess runs through the length direction of chill body 1.

In this embodiment, the chill body 1 includes a large-diameter portion 11, a tapered portion 12, and a small-diameter portion 13 coaxially and integrally provided up and down, the plurality of grooves include a plurality of first grooves 14 and a plurality of second grooves 15, the plurality of first grooves 14 are disposed at equal intervals in the circumferential direction of the outer side surface of the large-diameter portion 11, each first groove 14 penetrates through the length direction of the large-diameter portion 11, the plurality of second grooves 15 are disposed at equal intervals in the circumferential direction of the outer side surface of the small-diameter portion 13, and each second groove 15 penetrates through the length direction of the small-diameter portion 13; the tapered portion 12 has a smooth surface, the large diameter end of the tapered portion 12 has an outer diameter larger than that of the large diameter portion 11, the small diameter end of the tapered portion 12 has an outer diameter larger than that of the small diameter portion 13, the large diameter end of the tapered portion 12 is connected to the large diameter portion 11, and the small diameter end of the tapered portion 12 is connected to the small diameter portion 13.

In this embodiment, a hanging handle 16 is provided across the upper portion of the inner wall of the chiller body 1, and both ends of the hanging handle 16 are respectively fixed on the inner wall of the chiller body 1.

In the embodiment, the outer diameter of the chilling block body 1 is 60 mm smaller than the diameter of the inner side surface of the matched core box 2.

When making the core, the dark chill is placed in the middle of the inner side of the core box 2, so that the distance between the outer side surface of the chill body 1 and the inner side surface of the matched core box 2 is 30 mm, the space is filled with resin sand to be compact, and the dark chill is taken out along with the sand core when stripping. The dark chill plays the role of a chill and a core bar, and the strength of the sand core is increased. In the process of casting and producing tubular castings, the dark chill has a chilling effect on the tube wall, and promotes the simultaneous solidification of molten iron.

Claims

1. The special dark chill for the sand core is characterized by comprising a chill body, wherein the chill body is cylindrical, the upper part of the chill body is provided with an opening, a plurality of grooves are arranged on the outer side surface of the chill body at intervals, the plurality of grooves are arranged along the circumferential direction of the outer side surface of the chill body at equal intervals, and each groove penetrates through the length direction of the chill body.

2. The dark chill special for the sand core as claimed in claim 1, wherein the distance between two adjacent grooves along the circumferential direction of the outer side surface of the chill body is 25-100 mm.

3. The dark chill special for the sand core as claimed in claim 1, wherein the outer diameter of the chill body is 40-100 mm smaller than the diameter of the inner side surface of the matched core box.

4. The dark chill special for the sand core according to any one of claims 1 to 3, wherein the chill body comprises a large diameter part and a small diameter part which are coaxially and integrally arranged up and down, the plurality of grooves comprise a plurality of first grooves and a plurality of second grooves, the plurality of first grooves are arranged at equal intervals along the circumferential direction of the outer side surface of the large diameter part, each first groove penetrates through the length direction of the large diameter part, the plurality of second grooves are arranged at equal intervals along the circumferential direction of the outer side surface of the small diameter part, and each second groove penetrates through the length direction of the small diameter part.

5. The dark chill as claimed in claim 4, wherein a tapered portion is coaxially and integrally provided between said large diameter portion and said small diameter portion, the surface of said tapered portion is smooth, the outer diameter of the large diameter end of said tapered portion is larger than that of said large diameter portion, the outer diameter of the small diameter end of said tapered portion is larger than that of said small diameter portion, the large diameter end of said tapered portion is connected to said large diameter portion, and the small diameter end of said tapered portion is connected to said small diameter portion.

6. The dark chill special for the sand core as claimed in claim 1, wherein the upper part of the inner wall of the chill body is provided with a plurality of hanging handles or a plurality of hanging holes.

7. The dark chill special for the sand core as claimed in claim 6, wherein a hanging handle is arranged on the upper part of the inner wall of the chill body in a crossing manner, and two ends of the hanging handle are respectively fixed on the inner wall of the chill body.