CN217432959U - Large pipe fitting sand mould - Google Patents

Abstract

The utility model relates to a to the sand mould of large-scale pipe fitting preparation mainly utilizes pipe fitting product (especially large-scale pipe fitting), and its profile often has characteristics such as "symmetry" or "sameness" and "the profile is simple", and its profile modeling can utilize layer upon layer to establish and the sand mould completion of peeling off, consequently designs a preparation method, must produce the purpose-made sand mould of this large-scale pipe fitting, and simplifies the large-scale pipe fitting of tradition and must make with numerous and diverse sand mould.

Description

Large pipe fitting sand mould

Technical Field

The present invention relates to a mold, and more particularly to a sand mold for large pipe fittings.

Background

In the industry, there are often products with smaller economic scale, less quantity or special manufacture, which can be completed and satisfied by sand mold casting, wherein the sand mold casting is mainly to place a product or a wood mold of the product in the existing part of the sand pile in the sand box (to form a pattern), then to continuously fill sand around the pattern, and to pour a casting material (such as a metal solution) into the space profile formed after the pattern is taken out (the sand mold casting is a mature technology and is not described in a complicated way, but only described briefly). The sand casting technology can be applied to a plurality of products which are in accordance with the modeling outline of the model, and has no thickening effect and contribution. However, there are many products in industry, such as "pipe" products (especially large pipes), the profile of which often has the characteristics of "symmetry" or "identity" and "simple profile", and the profile modeling can be accomplished by using a simplified mold casting technique, but the mature and inertial sand mold manufacturing technique, i.e. the sand mold is made by using a wooden mold and then cast with a high temperature metal solution to mold, and many constructors do not propose a new mold casting method for the pipes with the characteristics of "symmetry" or "identity" and "simple profile". Therefore, the sand mold for manufacturing large pipe with the wooden mold is inevitably faced with the following problems:

one, traditional wooden model is bulky, and a pipe fitting needs a plurality of wooden models to make the sand mould of each face, and every model needs the inside and outside sand box of each face again, therefore the mould that a pipe fitting needs and the sand box is many, and bulky, so need to have great storage space and operating space.

Secondly, the sand mould of the large pipe fitting is manufactured by using the traditional wooden model, and because the number of the models is large, the manufacturing and the combination of the sand mould need to be manufactured by an experienced molder, and the manufacturing time is long, so the labor cost for manufacturing the sand mould is high.

Thirdly, the large-scale wooden model is expensive because of the high difficulty of making the model and the requirement of a plurality of models for each pipe fitting.

And fourthly, the wooden model is easy to be affected with damp or deformed and damaged due to factors such as lifting, storage and the like, so that a professional carpenter is required to frequently refit the wooden model.

If the required casting mold has a complicated profile, it may still be necessary to manufacture the casting mold by using the conventional sand mold technology, but if the tube product (especially large tube) has the characteristics of "symmetry" or "identity" and "simple profile", it is inevitable to have the disadvantage of "killing chicken and using a bull's knife", and there is a need to make a breakthrough in the technology.

SUMMERY OF THE UTILITY MODEL

The utility model solves the technical problem that: an improved construction method is provided for a sand mold of a large pipe fitting, and the sand mold of the large pipe fitting is designed for the construction method.

The technical means of the utility model are that: the large pipe sand mold comprises: the sand mould comprises a base sand mould, wherein an inner sand box with the outer diameter of at least not less than 600mm, a solid mould with two symmetrical arc petal bodies which can be screwed mutually and an outer sand box with two symmetrical arc petal bodies which can be screwed mutually are sequentially arranged on the surface of the base sand mould from inside to outside at intervals; and an outer sand mold and an inner sand mold are arranged in the interlayer space formed by the dry solidification of the casting sand and respectively arranged in the outer sand box and the solid mold, and the interlayer space of the inner sand box and the solid mold.

Therefore, the two arc petal bodies of the outer sand box can be disassembled from the horizontal direction; then the two arc petal bodies of the solid model are disassembled from the horizontal direction; after the two arc petal bodies of the solid mold are disassembled from the horizontal direction, the two arc petal bodies of the outer sand box are re-positioned on the base sand mold; therefore, the sand mould can be manufactured into a sand mould which is provided with the inner sand box, the mould cavity formed by the abdication of the solid mould and the outer sand box at intervals in sequence from inside to outside on the surface of the base sand mould; the mold cavity is connected to a casting channel.

The beneficial effects of the utility model are that: the utility model discloses no matter in "establish the mould" or "maintain the mould" and the off-the-shelf form removal process in the future, except the necessity of base sand mould, all can be because of borrowing by the route of "level to (horizontal), linearity, two dimension", and avoid the tradition because finished product irregularity must consider the multidirectional, three-dimensional, the loaded down with trivial details route of multi-angle, to only needing to consider the pipe fitting of characteristics such as "symmetry" or "sameness" and "simple profile", for simpler and easy system mould process, especially to large-scale pipe fitting (more than the internal diameter 600 mm), the economic benefits of performance is more outstanding.

And then the utility model discloses can reach following advantage:

firstly, the cost for manufacturing the die is reduced.

And secondly, the problems of insufficient skilled technicians, difficult recruitment of technicians and high salary cost are solved.

And thirdly, the success rate of casting finished products is improved.

Fourthly, the problem of handling, storage, maintenance and site area caused by the large size of the traditional wood pattern is solved.

Fifthly, the molding working hours are shortened, and the labor cost is reduced.

Drawings

Fig. 1A and fig. 1B are schematic diagrams of the base sand box of the present invention.

Fig. 2A and 2B are schematic diagrams of the inner sand box of the present invention.

Fig. 3A and 3B are schematic diagrams of the outer sand box for making the two symmetrical arc petal bodies of the present invention.

Fig. 4A and 4B are schematic diagrams of the solid mold for making the two symmetrical arc petal bodies of the present invention.

Fig. 5 is a schematic view of the partition board of the present invention.

Figure 6 is the utility model discloses base sand mo (u) ld sketch map.

Fig. 7 is a schematic view of the inner sand box of the present invention installed on the base sand mold.

Fig. 8 is a schematic view of the solid mold of the present invention installed on the base sand mold and sleeved on the outer edge of the inner sand box at intervals.

Fig. 9A and 9B are schematic views of the outer sand box and the isolation plate disposed inside the outer sand box of the present invention, which is sleeved on the base sand mold at the outer edge of the solid mold.

FIG. 10 is a schematic view showing that the casting sand of the present invention is injected into the sandwiched space between the outer flask and the solid mold and the sandwiched space between the inner flask and the solid mold.

Fig. 11 is a schematic view of the outer flask after the casting sand is hardened according to the present invention, the two arc petals of the outer flask are detached from the horizontal direction.

Fig. 12 is a schematic view of the solid model of the present invention in which the two-arc petals are detached from the horizontal direction.

FIG. 13 is a schematic view showing the outer sand box of the present invention with the two arc segments rested on the base sand mold.

Description of the figure numbers:

1. base sand mould

11. Base sand box

2. Inner sand mould

21. Inner sand box

3. Outer sand mould

30. Partition board

31. External sand box

311. Arc petal body

312. Arc petal body

4. Solid model

4A. pouring channel

4B. die cavity

41. Arc petal body

42. Arc petal body

5. Casting sand

P1, P2. interlayer space.

Detailed Description

The utility model relates to a large pipe fitting sand mould, which comprises a base sand mould 1 shown in figures 1A and 1B, wherein the surface of the base sand mould 1 is provided with an inner sand box 21 with the outer diameter not less than 600mm, a solid mould 4 with symmetrical arc petal bodies 41 and 42 which can be screwed with each other and an outer sand box 31 with symmetrical arc petal bodies 311 and 312 which can be screwed with each other and are shown in figures 4A and 4B, which are arranged at intervals from inside to outside in sequence as shown in figures 2A and 2B; and an outer sand mold 3 and an inner sand mold 2 are formed by dry-solidifying the casting sand 5 and respectively arranged in a sandwich space P1 between the outer sand box 31 and the solid mold 4 and a sandwich space P2 between the inner sand box 21 and the solid mold 4.

The following further describes the manufacturing method of the present invention.

As shown in fig. 6, a base sand mold 1 is manufactured, and the base sand mold 1 is formed by filling a base sand box 11 shown in fig. 1A and 1B with casting sand 5.

As shown in fig. 2A and 2B, a cylindrical inner flask 21 is made; the utility model discloses an external diameter of this interior sand box 21 is not less than 600mm at least, consequently can form the large-scale pipe fitting that the internal diameter is not less than 600mm in the preparation in the future.

As shown in fig. 3A and 3B, the cope flask 31 surrounded by the two symmetrical arc petals 311, 312 is manufactured, and the two symmetrical arc petals 311, 312 are fixed to each other by bolts.

As shown in fig. 4A and 4B, a solid mold 4 surrounded by two symmetrical arc petals 41 and 42 is manufactured, and the two symmetrical arc petals 41 and 42 are fixed to each other by bolts.

As shown in fig. 7, the inner flask 21 is mounted on the base sand mold 1.

As shown in FIG. 8, the solid mold 4 is installed on the base sand mold 1 and is sleeved at the positions spaced apart from the outer edge of the inner flask 21.

As shown in fig. 9A and 9B, the outer sand box 31 and the isolation plates 30 (shown in fig. 5) are sleeved on the base sand mold 1 at the outer edge of the solid mold 4.

As shown in FIG. 10, the casting sand 5 is poured into the two sandwiching spaces P1 and P2 from the position above the P1 between the outside flask 31 and the solid mold 4 and the P2 between the inside flask 21 and the solid mold 4. When the two parting boards 30 arranged inside the outside sand box 31 are removed, the outside sand box 31 is separated from the two parting boards 30 without damaging the sand mold when the two arc-shaped flaps 311, 312 of the outside sand box 31 are removed.

As shown in fig. 11, after the two sandwiched spaces P1 and P2 are hardened by the injected casting sand 5, an outer sand mold 3 and an inner sand mold 2 are formed from the outside to the inside, and then the two arc segments 311 and 312 of the outer sand box 31 are horizontally disassembled.

As shown in fig. 12, the two arc petals 41, 42 of the solid mold 4 are then horizontally disassembled.

As shown in fig. 13, after the two arc petals 41, 42 of the solid mold 4 are disassembled from the horizontal direction, the yield space is formed, and then the two arc petals 311, 312 of the outer sand box 31 are reset on the base sand mold 1. Therefore, a solid sand mold consisting of the base sand mold 1, the inner sand mold 2 and the outer sand mold 3 can be manufactured.

Therefore, the utility model discloses can provide and be used for:

the two arc petals 311, 312 of the outer sand box 31 are disassembled from the horizontal direction; then the two arc petal bodies 41 and 42 of the solid model 4 are disassembled from the horizontal direction; after the two arc petal bodies 41 and 42 of the solid mold 4 are disassembled from the horizontal direction, the two arc petal bodies 311 and 312 of the outer sand box 31 are reset on the base sand mold 1; therefore, the sand mold can be manufactured into the sand mold which is provided with the inner sand box 21, the mold cavity 4B formed by abdicating the solid mold 4 and the outer sand box 31 on the surface of the base sand mold 1 from inside to outside at intervals in sequence; the mold cavity 4B is connected to a pouring channel 4A for pouring.

By the foregoing, the utility model discloses "establish the mould" and "maintenance mould" can all be comparatively simple and easy, finished product form removal process can all be comparatively simple and easy in the future even, except this base sand mould 1's needs, all can reach because of borrowing by the route of "level to (horizontal), linear, two-dimentional", and avoid the tradition because finished product irregularity must consider the loaded down with trivial details route of multiaspect, three-dimensional, multi-angle, to only need considering the pipe fitting of characteristics such as "symmetry" or "identity" and "simple profile", for simpler and easier system mould process, especially to large-scale pipe fitting (internal diameter more than 600 mm), the economic benefits of performance is more outstanding.

Claims (2)

1. The utility model provides a large-scale pipe fitting sand mould which characterized in that includes:

the sand mould comprises a base sand mould, wherein an inner sand box with the outer diameter of at least not less than 600mm, a solid mould with two symmetrical arc petal bodies which can be screwed mutually and an outer sand box with two symmetrical arc petal bodies which can be screwed mutually are sequentially arranged on the surface of the base sand mould from inside to outside at intervals; and an outer sand mold and an inner sand mold are arranged in the interlayer space formed by the dry solidification of the casting sand and respectively arranged in the outer sand box and the solid mold, and the interlayer space of the inner sand box and the solid mold.

2. The large pipe sand mold of claim 1, wherein the base sand mold is formed by first filling a base sand box with casting sand.

Images