CN219503674U - Precoated sand shell mold for casting wear-resistant sleeve - Google Patents

Abstract

The utility model discloses a precoated sand shell mould for casting a wear-resistant sleeve, which comprises a plurality of shell-shaped units vertically stacked and connected, wherein each shell-shaped unit is provided with a shell and a plurality of dies, each die is fixedly embedded in the shell, a first groove corresponding to the wear-resistant sleeve structure is arranged between each die and the shell, an opening of each first groove is positioned on the lower side surface of the shell, a sprue and a plurality of branch runners are arranged on the shell, each first groove is communicated with the sprue through the branch runner, a first bulge which bulges upwards is annularly arranged on the upper side edge of the shell, a second bulge which bulges upwards is annularly arranged on the upper side of each die, and the plurality of second bulges are matched with the first bulge to form the second groove. The second groove formed by matching the first bulge on the shell with the second bulge on the die effectively prevents water leakage in the casting process, ensures the quality of products, and has the characteristics of simple structure and high working efficiency.

Description

Precoated sand shell mold for casting wear-resistant sleeve

Technical Field

The utility model relates to the technical field of equipment workpiece casting, in particular to a precoated sand shell mold for casting a wear-resistant sleeve.

Background

The precoated sand shell mold for casting the wear-resistant sleeve is used for a vertical parting non-box injection molding machine, because a sprue is designed in the middle of a pattern, molten steel enters the sprue from a top pouring cup during pouring, then flows transversely from two sides through a sprue, because of long processes of the patterns on two sides, the sprue corresponding to a product with small diameter is also small, the molten steel is long in mold filling time and high in cooling speed, sequential solidification cannot be realized for the product, the sprue with low fluidity difference of the molten steel temperature at the front end can not be fed for the product when the product at the tail end is solidified and contracted, casting defects such as shrinkage cavity, looseness and the like appear in the rear end product, the product with casting defects can not be detected when leaving a factory and is impacted in use, and the product is easy to crack, so that the quality accident of the product is caused.

Meanwhile, due to the influence of the air forming amount of the molding sand, the cast product has casting defects caused by air above the parting surface, the surface of the product is concave, the qualification rate is very low, and serious economic loss is caused. During the casting forming process, a large amount of gas exists in the cavity, and the gas is derived from: air retained in the mold cavity; gas generated by the sand mold and sand core material under the action of molten steel heat during pouring; gas generated by the chaplet and the chill during casting; the molten steel itself or the inclusion in the molten steel and the gas generated by the physical-chemical action of the molten steel; and the pouring system is improperly set or the pouring operation is not standard, so that the gas and the like are involved with the molten steel. If these gases are not well led out, serious quality problems can occur in the castings.

Moreover, when the template is used, the hemispherical pattern close to the sand feeding port is subjected to larger scouring during sand feeding, the spherical surface is easy to wear, and after serious wear, the hemispherical pattern is led to the product to be scrapped due to out-of-round defect. Because the template adopts machining center to integrally process, only the whole process or the repair of the worn pattern can be carried out, the phenomena of size deviation, short service life and the like are easy to occur in the process after electric welding repair, and the template can only be scrapped after serious wear.

Disclosure of Invention

In order to solve the technical problems, the utility model provides a precoated sand shell mould for casting a wear-resistant sleeve, which comprises a plurality of shell-shaped units vertically stacked and connected, wherein each shell-shaped unit is provided with a shell and a plurality of moulds, each mould is fixedly embedded in the shell, a first groove corresponding to the wear-resistant sleeve structure is arranged between each mould and the shell, an opening of each first groove is positioned on the lower side surface of the shell, a sprue vertically penetrating the shell and a plurality of branch runners positioned on the lower side of the shell and corresponding to the moulds one by one are arranged on the shell, each first groove is communicated with the sprue through the branch runner, the upper side edge of the shell is annularly provided with a first bulge which bulges upwards, the upper side of each mould is annularly provided with a second bulge which bulges upwards, and the plurality of second bulges are matched with the first bulge to form a second groove which is matched and connected with the lower side of the shell-shaped unit.

Preferably, the first bulge is provided with a plurality of first arc-shaped grooves protruding outwards, and the lower side of the shell is provided with a plurality of first arc-shaped bulges protruding outwards and positioned in a matched mode with the first arc-shaped grooves.

Preferably, each second protrusion is provided with a plurality of second arc-shaped grooves protruding inwards, and the inner side of each die is provided with a second arc-shaped protrusion protruding inwards and positioned in a matched mode in the second arc-shaped grooves.

Preferably, the first arc-shaped grooves are uniformly distributed on the first protrusions.

Preferably, the second arc-shaped grooves are uniformly distributed on the second protrusions.

Preferably, the height of each shell-type unit is 43-45mm, and the thickness of the shell-type unit is 6-8mm.

Compared with the prior art, the precoated sand shell mold for casting the wear-resistant sleeve has the advantages that the first bulge arranged on the shell is matched with the second bulge arranged on the upper side of each mold to form the second groove, water leakage in the casting process can be effectively prevented based on the second groove, positioning between two shell mold units is enhanced, the connecting structure between the shell mold units is greatly simplified, and the production efficiency is improved; meanwhile, based on the matching of the first arc-shaped groove and the first arc-shaped bulge and the second arc-shaped groove and the second arc-shaped bulge, the positioning accuracy between two adjacent shell-type units is further guaranteed, the quality of products is further guaranteed, and the device has the characteristics of being simple in structure and efficient in work.

Drawings

Figure 1 is a schematic structural view of a precoated sand shell mold for casting a wear sleeve in the utility model,

figure 2 is a bottom view of figure 1,

FIG. 3 is a cross-sectional view of a precoated sand shell mold for casting wear resistant sleeves in accordance with the present utility model.

In the figure: 1. the device comprises a shell, a first arc-shaped bulge, a die, a second arc-shaped bulge, a first groove, a straight pouring gate, a branch pouring gate, a first arc-shaped bulge, a first arc-shaped groove, a second arc-shaped bulge, a second arc-shaped groove, a second arc-shaped bulge, a first arc-shaped groove, a second arc-shaped groove and a second groove.

Detailed Description

The utility model will be described more fully hereinafter with reference to the accompanying drawings and the preferred embodiments for facilitating an understanding of the structure and method of operation of the utility model, but the scope of the utility model is not limited to the specific embodiments described. It should be noted that, under the condition of not affecting the use effect, the structural features and the sizes of the components in the embodiment of the utility model can be changed, the connection mode can be replaced, and the size of the device can be changed.

Unless defined otherwise, all technical and scientific terms used hereinafter have the same meaning as commonly understood by one of ordinary skill in the art. The terms "first," "second," and the like in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to facilitate distinguishing between corresponding features. Also, the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "connected" and the like are not limited to a direct connection, but may be indirectly connected through other intermediate connections. The terms "upper", "lower", "one side", "the other side", "vertical", "lateral", "inner", "outer", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships are changed accordingly, and fig. 1 is taken as an example, with the paper surface facing up, the paper surface facing down, and the vertical direction facing up and down.

As shown in fig. 1-3, the precoated sand shell mold for casting the wear-resistant sleeve provided by the utility model comprises a plurality of shell mold units which are vertically stacked and connected, wherein each shell mold unit is provided with a shell 1 and a plurality of molds 2, each mold 2 is fixedly embedded in the shell 1, a first groove 3 corresponding to the wear-resistant sleeve structure is arranged between each mold 2 and the shell 1, the opening of each first groove 3 is positioned on the lower side surface of the shell 1, a straight runner 4 vertically penetrating the shell 1 and a plurality of branch runners 5 which are positioned on the lower side of the shell 1 and are in one-to-one correspondence with the molds 2 are arranged on the shell 1, each first groove 3 is communicated with the straight runner 4 through the branch runners 5, the upper side edge of the shell 1 is annularly provided with a first bulge 6 which bulges upwards, the upper side of each mold 2 is annularly provided with a second bulge 7 which bulges upwards, and the plurality of second bulges 7 are matched with the first bulge 6 to form a second groove 8 which is matched and connected with the lower side of the shell mold unit.

In this embodiment, the first protrusion 6 disposed on the housing 1 and the second protrusion 7 disposed on the upper side of each mold 2 are matched to form the second groove 8, so that the water leakage phenomenon of a plurality of vertically stacked and connected shell units in the casting process can be effectively prevented based on the second groove 8, and meanwhile, the positioning between two shell units is greatly enhanced based on the second groove 8 and the matching connection with the lower side of the shell units, the connection structure between the shell units is effectively simplified, and the production efficiency is improved; in addition, in the structure, two adjacent shell-type units are changed into a parting surface from the original two parting surfaces, so that burrs on the surface of a product are greatly reduced, further, the subsequent polishing process is reduced, the production cost is reduced, and the novel polishing machine has the characteristics of simple structure and high working efficiency.

As shown in fig. 1-3, the first protrusions 6 are provided with a plurality of first arc-shaped grooves 61 protruding outwards, the lower side of the shell 1 is provided with a plurality of first arc-shaped protrusions 11 protruding outwards and positioned in a matching manner with the first arc-shaped grooves 61, each second protrusion 7 is provided with a plurality of second arc-shaped grooves 71 protruding inwards, and the inner side of each mold 2 is provided with a second arc-shaped protrusion 21 protruding inwards and positioned in a matching manner with the second arc-shaped grooves 71.

In this embodiment, the first arc-shaped groove 61 and the first arc-shaped protrusion 11 are matched, and the second arc-shaped groove 71 and the second arc-shaped protrusion 21 are matched, so that the positioning accuracy between two adjacent shell-type units is further ensured, and further, the product quality is strongly guaranteed.

As shown in fig. 1-3, the first arc-shaped grooves 61 are uniformly distributed on the first protrusions 6, and the second arc-shaped grooves 71 are uniformly distributed on the second protrusions 7.

In this embodiment, the first arc-shaped groove 61 and the second arc-shaped groove 71 are uniformly arranged on the first protrusion 6 and the second protrusion 7 respectively, so that the matching positioning points of the adjacent shell-type units are more uniform, and the positioning accuracy between the two adjacent shell-type units is further ensured.

In this embodiment, the height of each shell-type unit is 43-45mm, and the thickness of the shell-type unit is 6-8mm. Compared with the prior art, the height and the thickness of the shell-type unit are reduced correspondingly, so that the weight of the whole structure is reduced effectively, the daily operation of operators is facilitated, and the production cost is reduced.

The precoated sand shell mold for casting the wear-resistant sleeve provided by the utility model is described in detail. The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the core concepts of the utility model. It should be noted that it will be apparent to those skilled in the art that various modifications and adaptations of the utility model can be made without departing from the principles of the utility model and these modifications and adaptations are intended to be within the scope of the utility model as defined in the following claims.

Claims (6)

1. The utility model provides a wear-resisting cover casting is with tectorial membrane sand shell type, a serial communication port, including a plurality of shell type unit of being connected that stacks perpendicularly, every shell type unit all is equipped with casing (1) and a plurality of mould (2), every mould (2) all is fixed to be inlayed and is located in casing (1) and all be equipped with one first recess (3) corresponding with wear-resisting cover structure between every mould (2) and the casing (1), the opening of every first recess (3) all is located casing (1) downside, be equipped with vertical sprue (4) that run through casing (1) and be located casing (1) downside and with mould (2) a plurality of branch runner (5) of one-to-one, every first recess (3) all are equipped with bellied first arch (6) upwards through branch runner (5) and sprue (4) intercommunication on casing (1), the upside ring of every mould (2) is equipped with bellied second arch (7) upwards, a plurality of second arch (7) and first protruding (6) are connected with the second side of casing (8) phase-match of matching of unit.

2. The precoated sand shell mold for casting the wear-resistant sleeve as claimed in claim 1, wherein the first bulge (6) is provided with a plurality of first arc-shaped grooves (61) protruding outwards, and the lower side of the shell (1) is provided with a plurality of first arc-shaped bulges (11) protruding outwards and positioned in a matched manner with the first arc-shaped grooves (61).

3. Precoated sand shell mould for casting wear-resistant sleeves according to claim 1, characterized in that each second protrusion (7) is provided with a plurality of second arc-shaped grooves (71) protruding inwards, and the inner side of each mould (2) is provided with a second arc-shaped protrusion (21) protruding inwards and positioned in a matching way with the second arc-shaped grooves (71).

4. Precoated sand shell mould for casting wear sleeve according to claim 2, characterized in that the first arc-shaped grooves (61) are evenly arranged on the first protrusions (6).

5. A precoated sand shell mould for casting wear sleeves according to claim 3, characterized in that the second arc grooves (71) are evenly arranged on the second protrusions (7).

6. A precoated sand shell for casting a wear sleeve according to any one of claims 1 to 5, wherein each of said shell elements has a height of 43 to 45mm and a thickness of 6 to 8mm.