CN210387442U

CN210387442U - Lost foam

Info

Publication number: CN210387442U
Application number: CN201921239931.1U
Authority: CN
Inventors: 王兴贤
Original assignee: Xiangshan Zhongyu Mould Co ltd
Current assignee: Xiangshan Zhongyu Mould Co ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-04-24
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses a lost foam, which comprises a lower male die and an upper female die, wherein a cavity for forming a foam model is formed between the lower male die and the upper female die; the die cavities comprise a left die cavity and a right die cavity, the left die cavity is used for forming a left model, the right die cavity is used for forming a right model, and the left model and the right model are spliced to form the foam model; the lower punch comprises a lower die plate and a loose piece assembly, the left die cavity and the right die cavity are both provided with the loose piece assembly, the loose piece assembly comprises a first slider, a second slider, a third slider, a fourth slider and a fifth slider, the first slider, the second slider and the third slider can sequentially slide to the outer side to perform demolding, and the fourth slider and the fifth slider can sequentially slide to the inner side to perform demolding. Has the advantages of convenient molding and high molding quality.

Description

Lost foam

Technical Field

The utility model relates to a mould field, concretely relates to disappearance mould.

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 lost foam casting (also called solid casting) is a novel casting method which comprises the steps of bonding and combining paraffin or foam models with similar sizes and shapes to form a model cluster, coating refractory paint on the model cluster, drying the model cluster, burying the model cluster in dry quartz sand for vibration modeling, pouring under negative pressure to gasify the model, enabling liquid metal to occupy the position of the model, solidifying and cooling the model cluster to form the casting.

A bearing seat is arranged in an existing product, a foam model is manufactured by adopting a lost foam, and then the foam model is melted to form a final bearing seat. In the prior art, the foam model manufactured by the lost foam is of an integrated structure, and the foam model is inconvenient to demould because a plurality of grooves and back-off parts exist in the foam model; and the foam model has larger volume and the integral structure is easy to deform.

Therefore, it is an urgent problem to be solved by those skilled in the art to improve the conventional evanescent mode to overcome the above problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a convenient shaping, disappearance mould that shaping quality is high.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the lost foam comprises a lower male die and an upper female die, wherein a cavity for forming a foam model is formed between the lower male die and the upper female die; the method is characterized in that: the die cavities comprise a left die cavity and a right die cavity, the left die cavity is used for forming a left model, the right die cavity is used for forming a right model, and the left model and the right model are spliced to form the foam model;

the lower punch comprises a lower die plate and a loose piece assembly, the left die cavity and the right die cavity are both provided with the loose piece assembly, the loose piece assembly comprises a first slider, a second slider, a third slider, a fourth slider and a fifth slider, the first slider, the second slider and the third slider can sequentially slide to the outer side to perform demolding, and the fourth slider and the fifth slider can sequentially slide to the inner side to perform demolding. During the drawing of patterns, earlier with last die rebound separation, move first slider, second slider, third slider to the outside again and carry out the drawing of patterns, then move the inside side of fourth slider, fifth slider and carry out the drawing of patterns, left model and right model can directly take off from the lower bolster this moment.

Preferably, the lower template is provided with a first limiting groove, a second sliding groove, a third limiting notch, a fourth limiting groove and a fifth sliding groove at the left cavity and the right cavity, the first sliding block is clamped in the first limiting groove, the second sliding block is arranged in the second sliding groove in a sliding manner, the third sliding block is embedded in the third limiting notch, the fourth sliding block is clamped in the fourth limiting groove, and the fifth sliding block is arranged in the fifth sliding groove in a sliding manner. The first limiting groove, the second sliding groove, the third limiting notch, the fourth limiting groove and the fifth sliding groove are arranged and used for positioning the loose piece assembly, and die assembly and demolding operations are facilitated.

As an improvement, the lower template is provided with a positioning protrusion at the left cavity, the lower template is provided with a positioning recess at the right cavity, the positioning protrusion is used for forming a positioning hole of the left model, the positioning recess is used for forming a positioning column of the right model, the positioning column can be embedded in the positioning hole, and the left model and the right model are spliced through the matching of the positioning column and the positioning hole. Better positioning is realized during splicing of the left model and the right model, dislocation between the left model and the right model is avoided, and the forming quality of products can be improved.

Compared with the prior art, the utility model has the advantages of it is following: the lost foam mold of the scheme divides a cavity into two parts, namely a left cavity and a right cavity, respectively molds a left mold and a right mold, and then splices the molded left and right molds into a foam mold in a complete bearing seat shape. The demolding structure of the lost foam can be simplified through the structure, so that the linear demolding can be carried out, and the operation is convenient. And after the foam model is split, the volume of the single left model and the single right model is reduced, and the deformation of the single left model and the single right model caused by the self gravity is reduced.

Drawings

Fig. 1 is a schematic perspective view of a preferred embodiment of the present invention (upper female mold is not shown, the same applies below);

fig. 2 is an exploded view of a preferred embodiment according to the present invention;

fig. 3 is a half sectional view of a preferred embodiment according to the present invention;

fig. 4 is a schematic perspective view of a lower template according to a preferred embodiment of the present invention;

fig. 5 is a schematic perspective view of a left mold and a right mold according to a preferred embodiment of the present invention;

fig. 6 is a half sectional view when forming a left mold and a right mold according to a preferred embodiment of the present invention;

FIG. 7 is a schematic perspective view of a foam pattern formed in accordance with a preferred embodiment of the present invention;

fig. 8 and 9 are exploded views of a foam pattern formed according to a preferred embodiment of the present invention from different perspectives.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art.

In the description of the present invention, it should be noted that, for the orientation words, if there are terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the orientation and positional relationship indicated are based on the orientation or positional relationship shown in the drawings, and only for the convenience of describing the present invention and simplifying the description, it is not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and not be construed as limiting the specific scope of the present invention.

As shown in fig. 1 to 9, a preferred embodiment of the present invention includes a lower punch 1 and an upper die (which are not shown in the drawings because of their relatively simple structure and do not include inventive technical features and to show the internal structure of the lost foam), between which a cavity for forming a foam pattern is formed; the key point is that the die cavities comprise a left die cavity 2 and a right die cavity 3, the left die cavity is used for forming a left model 101, the right die cavity is used for forming a right model 102, and the left model 101 and the right model 102 are spliced to form a foam model 100.

Specifically, the lower male die 1 comprises a lower die plate 11 and a loose piece assembly 12, the loose piece assembly 12 is arranged in each of the left die cavity 2 and the right die cavity 3, the loose piece assembly 12 comprises a first sliding block 121, a second sliding block 122, a third sliding block 123, a fourth sliding block 124 and a fifth sliding block 125, the first sliding block 121, the second sliding block 122 and the third sliding block 123 can sequentially slide to the outside to perform demolding, and the fourth sliding block 124 and the fifth sliding block 125 can sequentially slide to the inside to perform demolding.

In this embodiment, the lower mold plate 11 has a first limiting groove 111, a second sliding groove 112, a third limiting notch 113, a fourth limiting groove 114 and a fifth sliding groove 115 at the left cavity 2 and the right cavity 3, the first slider 121 is clamped in the first limiting groove 111, the second slider 122 is slidably disposed in the second sliding groove 112, the third slider 123 is embedded in the third limiting notch 113, the fourth slider 124 is clamped in the fourth limiting groove 114, and the fifth slider 125 is slidably disposed in the fifth sliding groove 115.

In addition, the lower template 11 is provided with a positioning protrusion 116 at the left cavity 2, the lower template 11 is provided with a positioning recess 117 at the right cavity 3, the positioning protrusion 116 is used for forming a positioning hole 1011 of the left model 101, the positioning recess 117 is used for forming a positioning column 1021 of the right model 102, the positioning column 1021 can be embedded in the positioning hole 1011, and the left model 101 and the right model 102 are spliced through the matching of the positioning column 1021 and the positioning hole 1011.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The lost foam comprises a lower male die and an upper female die, wherein a cavity for forming a foam model is formed between the lower male die and the upper female die; the method is characterized in that: the die cavities comprise a left die cavity and a right die cavity, the left die cavity is used for forming a left model, the right die cavity is used for forming a right model, and the left model and the right model are spliced to form the foam model;

the lower punch comprises a lower die plate and a loose piece assembly, the left die cavity and the right die cavity are both provided with the loose piece assembly, the loose piece assembly comprises a first slider, a second slider, a third slider, a fourth slider and a fifth slider, the first slider, the second slider and the third slider can sequentially slide to the outer side to perform demolding, and the fourth slider and the fifth slider can sequentially slide to the inner side to perform demolding.

2. A lost foam according to claim 1, wherein: the lower die plate is provided with a first limiting groove, a second sliding groove, a third limiting notch, a fourth limiting groove and a fifth sliding groove at the left die cavity and the right die cavity, the first sliding block is clamped in the first limiting groove, the second sliding block is arranged in the second sliding groove in a sliding mode, the third sliding block is embedded in the third limiting notch, the fourth sliding block is clamped in the fourth limiting groove, and the fifth sliding block is arranged in the fifth sliding groove in a sliding mode.

3. A lost foam according to claim 1, wherein: the lower template is provided with a positioning bulge at the left cavity, the lower template is provided with a positioning recess at the right cavity, the positioning bulge is used for forming the positioning hole of the left model, the positioning recess is used for forming the positioning column of the right model, the positioning column can be embedded in the positioning hole, and the left model and the right model are spliced through the matching of the positioning column and the positioning hole.