CN213968881U

CN213968881U - Anti-deformation die for V-method casting excavator casting

Info

Publication number: CN213968881U
Application number: CN202022649397.0U
Authority: CN
Inventors: 张�杰; 闫旭; 成毅; 南森
Original assignee: Shanxi Huaxiang Group Co ltd
Current assignee: Shanxi Huaxiang Group Co ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-08-17
Anticipated expiration: 2030-11-16

Abstract

The utility model discloses a V method casting digs shape mould of preapring for an unfavorable turn of events of quick-witted foundry goods adopts the top pouring mode, and the mould contains mould and lower mould, goes up the mould corresponding to the A face of digging the quick-witted foundry goods, and the lower mould corresponds to the B face of digging the quick-witted foundry goods, contains the sprue gate in the middle of being located and a plurality of oral cavities of emitting that evenly arrange in going up the mould, the utility model discloses a with the mould mode of dividing mould technology opposite direction (the direction was exchanged from top to bottom) of general masses, the box that rises that appears when having solved V method casting production, defects such as deformation to improved production efficiency, promoted the thin wall, the qualification rate of digging quick-witted class foundry goods is complicated to the shape, reduced the defective index by a wide margin, thereby reduced the manufacturing cost of product, still saved the finishing and polished the activity duration.

Description

Anti-deformation die for V-method casting excavator casting

Technical Field

The utility model relates to a mould that divides that V method casting was used especially is applied to the shape mould of preapring for an unfavorable turn of events that produces U-shaped machine foundry goods of digging.

Background

The V-method casting is a vacuum sealing molding casting process, also called vacuum sealing molding method, also called decompression or negative pressure molding method. The casting is produced by adopting a mode of matching thin film vacuum seal with molding sand. Popular parting is that the important surface of a product is downward generally in the process of manufacturing a mould of the product.

When some excavator castings with complex structures are produced, due to the casting structure, the mold process design is carried out according to a common mold splitting mode, the commonly produced castings often have the defects of surface sand collapse, deformation, air holes and the like, for example, U-shaped castings shown in figure 1, existing excavator casting molds shown in figures 2 and 3 are mold processes designed in a popular mold splitting mode, namely bottom pouring type pouring systems, dead heads and pouring gates in the molds are located in U-shaped cavities, the A-shaped products produced in the mode are attractive in shape, but the problem is that the static pressure height of the pouring systems is 1300mm, large static pressure extrudes sand molds, the vacuum flow is increased during pouring, the hardness of the sand molds is reduced, the uncooled molten iron extrudes the sand molds due to gravity, the sand molds are deformed and expand, the air holes and the like easily occur at product processing positions, and the actually produced castings are detected, about 50 percent of castings have the defects of deformation, box expansion, air holes and the like, so that the later repair amount of products is large and even the products are scrapped.

The main reason for analyzing the generation of the defects is that the mold process design does not conform to the structural casting of the type, so a novel mold splitting process is used for solving the problem of the casting defects on the products of the type.

SUMMERY OF THE UTILITY MODEL

The utility model provides a technical problem promptly provide a mould of machine foundry goods is dug in production U-shaped, can effectively prevent that the thin foundry goods of wall from warping, defect such as case rises.

The technical means adopted by the utility model are as follows.

The utility model provides a V method casting digs mould of preapring for an unfavorable turn of events of machine foundry goods, adopts the top pouring mode, and the mould contains mould and lower mould, go up the mould corresponding to the A face of digging the machine foundry goods, the lower mould is corresponding to the B face of digging the machine foundry goods, include in the last mould that is located the pouring gate in the middle and a plurality of oral cavities that emit that evenly arrange.

Preferably, the excavator castings produced by the mold are U-shaped excavator castings.

Preferably, the lower part of the upper die is internally provided with an upper die cavity corresponding to the surface A of the excavator casting, the pouring gate penetrates through the upper die cavity and the upper part of the upper die, and the upper part of the lower die is internally provided with a lower die cavity corresponding to the surface B of the excavator casting.

Preferably, the number of the riser cavities is 6, and the riser cavities are symmetrically arranged on two sides of the pouring port in pairs.

The utility model has the advantages that: compare current casting mode, the utility model discloses a divide mould mode opposite (the upper and lower direction is exchanged) with general masses, the case that rises that appears when having solved V method casting production, defect such as deformation to improved production efficiency, promoted the qualification rate of thin wall, the complicated machine type foundry goods that digs of shape, reduced the defective rate by a wide margin, thereby reduced the manufacturing cost of product, still saved the finishing and polished the activity duration.

Drawings

Fig. 1 is a perspective view of a conventional mold.

Fig. 2 is a schematic side view of a conventional mold.

Fig. 3 is another side view angle structural diagram of the conventional mold.

Fig. 4 is a schematic side view of the mold of the present invention.

Fig. 5 is another schematic side view angle structure diagram of the mold of the present invention.

Fig. 6 is a schematic structural view of an excavator casting produced by using the die of the utility model.

Description of the figure numbers:

the prior art is as follows: upper die 1 and lower die 2

The utility model discloses: the upper die comprises an upper die 3, an upper die cavity 31, a pouring gate 32, a riser cavity 33, a lower die 4, a lower die cavity 41, a digging machine casting 5 and a main body part 51.

Detailed Description

The utility model provides a V method casting digs shape mould of preapring for an unfavorable turn of events of quick-witted foundry goods, it can produce to dig quick-witted foundry goods 5 as the U-shaped shown in figure 6, and for the convenience of description, the circular-arc lateral surface that the definition was dug quick-witted foundry goods 5 is A face, reverse U-shaped chamber side is the B face.

As shown in fig. 4 and 5, the mold includes an upper mold 3 and a lower mold 4, the upper mold 3 corresponding to the a-side of the U-shaped shovel casting, and the lower mold 4 corresponding to the B-side of the U-shaped shovel casting.

In the lower part of the upper mold 3 is an upper mold cavity 31 corresponding to the surface a of the excavator casting 5 and corresponding to the main body 51 of the excavator casting 5. The upper mold 3 includes a gate 32, the gate 32 penetrates the upper portion of the upper mold cavity 31 and the upper portion of the upper mold 3, and the gate 32 is positioned at the center so that molten iron can uniformly flow around when molten iron is poured. The riser cavities 33 are uniformly arranged around the pouring gate 32 and can be symmetrically distributed for 6 as shown in the figure, the riser cavities 33 are used for discharging gas in the cavities when molten iron is poured, and simultaneously, the feeding effect is realized when the molten iron is cooled, so that the quality of formed castings is ensured.

In the upper part of the lower die 4 is a lower die cavity 41 corresponding to the surface B of the excavator casting 5.

The utility model discloses a gating system is the top pouring, and the molten iron of casting gets into from sprue gate 32 and is full of whole die cavity, and it upwards is full of to have the molten iron until emerging oral cavity 33, and gating system's static pressure highly is 400mm, compares current mode static pressure and obviously lowers, effectively guarantees earlier that the pouring cools off earlier, gets rid of because the sand mould that sand mould hardness reduction leads to when the pouring warp, and this mode changes the rising head position to the A face, more is favorable to gaseous getting rid of. The special emphasis on the polishing method during polishing can also obtain the A surface with beautiful shape, and finally the product percent of pass is increased to more than 96 percent.

Claims

1. The utility model provides a V method casting digs anti-deformation mould of machine foundry goods which characterized in that adopts the top pouring mode, and the mould contains mould (3) and lower mould (4), go up mould (3) corresponding to the A face of digging the machine foundry goods, lower mould (4) are corresponding to the B face of digging the machine foundry goods, go up and include in mould (3) that be located pouring gate (32) in the middle of and a plurality of oral cavity (33) of emitting that evenly arrange.

2. The deformation-preventing mold for V-process casting excavator castings according to claim 1, characterized in that the excavator castings produced by the mold are U-shaped excavator castings (5).

3. The mold for preventing deformation of a V-process casting excavator casting according to claim 1, wherein the lower part of the upper mold (3) is provided with an upper mold cavity (31) corresponding to the surface A of the excavator casting, the pouring gate (32) penetrates the upper mold cavity (31) and the upper part of the upper mold (3), and the upper part of the lower mold (4) is provided with a lower mold cavity (41) corresponding to the surface B of the excavator casting.

4. The deformation-preventing mold for V-process casting excavator castings according to claim 3, wherein the number of the riser cavities (33) is 6, and two of the riser cavities are symmetrically arranged on both sides of the pouring gate (32).