CN215279762U

CN215279762U - Relay valve seat die

Info

Publication number: CN215279762U
Application number: CN202121782154.2U
Authority: CN
Inventors: 周炳军; 陈燕慧
Original assignee: Donggang Liaocheng Machinery Co ltd
Current assignee: Donggang Liaocheng Machinery Co ltd
Priority date: 2021-08-02
Filing date: 2021-08-02
Publication date: 2021-12-24
Anticipated expiration: 2031-08-02

Abstract

The utility model discloses a relay valve seat mould relates to tectorial membrane casting mould technical field, including core box and core, the inside of core box has the die cavity, and the core is located the die cavity, and the core has the core head, and the core box has the fabrication hole, and the die cavity passes through the fabrication hole and communicates with the outside of core box, and the core head is pegged graft downtheholely at the fabrication. The fabrication holes play a role in supporting and fixing the core heads, so that the cores are fixed in the core box, and the exhaust of the internal cavity is facilitated.

Description

Relay valve seat die

Technical Field

The utility model relates to a tectorial membrane casting mould technical field, concretely relates to relay valve seat mould.

Background

The relay valve seat is a part of a railway train braking system, and 10 isolated small thermal nodes are also formed in the casting process, so that shrinkage porosity and shrinkage cavity are easily generated. One of the three cavities is provided with a small hole with phi of 14mm after being processed, the diameter of the core head can only be phi 8-phi 9mm, and the casting difficulty is high. The relay valve seat has the advantages of thin wall thickness and more cavities, supportable core heads are small, even the core heads cannot be added for supporting, the core is difficult to fix only by the small core heads, and the core is difficult to exhaust effectively, so that the core is basically broken and choked in the trial production process.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model provides a relay valve seat mould to it is difficult to fixed to solve the core, and inside die cavity is difficult to carminative problem effectively.

In order to achieve the above object, the present invention provides the following technical solutions:

a relay valve seat mold comprises a core box and a core, wherein a cavity is formed in the core box, the core is located in the cavity, the core is provided with a core head, the core box is provided with a process hole, the cavity is communicated with the outside of the core box through the process hole, and the core head is inserted into the process hole.

Further, the core has three core bodies, and the second core body and the third core body are disposed on the same side of the first core body.

Furthermore, the core print is a cylinder, and the section of the fabrication hole is circular.

Furthermore, the core box is a precoated sand core box manufactured by adopting a precoated sand process.

Furthermore, the film-coated sand core box comprises a first film-coated box and a second film-coated box, the core is positioned between the first film-coated box and the second film-coated box, and the first film-coated box is provided with a fabrication hole.

Furthermore, the relay valve seat mold further comprises a riser, the riser is arranged at the upper part of the core box, and the riser is a heating riser.

The utility model has the advantages of as follows: the fabrication holes play a role in supporting and fixing the core heads, so that the cores are fixed in the core box, and the exhaust of the internal cavity is facilitated.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.

The structure, ratio, size and the like shown in the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by people familiar with the technology, and are not used for limiting the limit conditions which can be implemented by the present invention, so that the present invention has no technical essential significance, and any structure modification, ratio relationship change or size adjustment should still fall within the range which can be covered by the technical content disclosed by the present invention without affecting the efficacy and the achievable purpose of the present invention.

Fig. 1 is a schematic structural diagram of a core of a relay valve seat mold according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a core print on a core of a relay valve seat mold according to an embodiment of the present invention;

fig. 3 is a schematic view of a first film-coating type box of a relay valve seat mold according to an embodiment of the present invention;

fig. 4 is a schematic view of a second film-coated box of the relay valve seat mold according to an embodiment of the present invention.

In the figure: 1-a core; 11-a first core body; 12-a second core body; 13-a third core body; 14-core print; 21-a first film-coated cartridge; 22-a second film-coated cartridge; 24-fabrication holes; 31-riser.

Detailed Description

The present invention is described in terms of specific embodiments, and other advantages and benefits of the present invention will become apparent to those skilled in the art from the following disclosure. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present specification, the terms "upper", "lower", "left", "right", "middle", and the like are used for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

As shown in fig. 1 to 3, the utility model provides a relay valve seat mold, including core box and core 1, the inside of core box has the die cavity, and core 1 is located the die cavity, and core 1 has core head 14, and the core box has fabrication hole 24, and the die cavity passes through fabrication hole 24 and communicates with the outside of core box, and core head 14 pegs graft in fabrication hole 24. The fabrication holes 24 are used for supporting and fixing the core print 14, so that the core 1 is fixed in the core box, and the exhaust of the internal cavity is facilitated.

In an alternative embodiment, as shown in fig. 1, the core 1 has three core bodies, and the second core body 12 and the third core body 13 are disposed on the same side of the first core body 11. Because the third core body 13 is difficult to fix in the core box, the buoyancy of the molten iron is large in the pouring process, the supporting force of the core 1 is small, the core 1 can break and drift, the dimensional accuracy between the cores 1 cannot be ensured, the core head 14 and the fabrication hole 24 enable the third core body 13 to be fixed in the core box, and the exhaust of an internal cavity is facilitated.

In an alternative embodiment, as shown in fig. 2, the core print 14 is a cylinder, the cross section of the process hole 24 is a circle, molten iron is poured into the core box to obtain a relay valve seat workpiece, and the inner circumferential surface of the circular hole on the workpiece is provided with a taper pipe thread, specifically, the taper pipe thread is an english thread with a diameter of 1/2 inches. The threaded hole is blocked in the process of machining the relay valve seat workpiece, air leakage cannot occur, and therefore taper pipe threads are used.

In an alternative embodiment, the core box is a precoated sand core box made using a precoated sand process. The coated sand core box is adopted to manufacture the relay valve seat, so that the overall surface roughness of the appearance of a casting product is ensured, and the positioning accuracy of the core print 14 is ensured. The precoated sand core box has the advantages of high precision, less box staggering phenomenon, accurate positioning, small gas forming amount, high strength, more accurate inner cavity size, good roughness in the cavity and cleanness. For the pneumatic valve body, the risk that the air passage is blocked due to the fact that impurities fall off in the ventilation process of the valve body is reduced.

In an alternative embodiment, shown in figures 3 to 4, the precoated core box comprises a first 21 and a second 22 precoated cartridges, the core 1 being located between the first 21 and the second 22 precoated cartridges, the first 21 being provided with the fabrication holes 24.

In an alternative embodiment, as shown in fig. 3, the relay valve seat mold further comprises a riser 31, the riser 31 is arranged at the upper part of the core box, and the riser 31 is a heating riser. The exothermic riser is formed by adding a certain amount of thermite, fluxing agent, oxidant and the above mentioned heat insulating material when the riser 31 is made. The heating function and the heat preservation function are simultaneously realized. When casting, the riser 31 is ignited and burned rapidly at about 680 ℃, and the temperature of molten iron in the riser 31 is raised by the heat released at the moment, so that the solidification time of molten metal in the riser 31 is prolonged, the feeding time is prolonged, and the feeding efficiency of the riser 31 to the casting is improved.

Although the invention has been described in detail with respect to the general description and the specific embodiments, it will be apparent to those skilled in the art that modifications and improvements can be made based on the invention. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. A relay valve seat die is characterized in that: the core box comprises a core box and a core (1), wherein a cavity is formed in the core box, the core (1) is located in the cavity, the core (1) is provided with a core print (14), the core box is provided with a process hole (24), the cavity is communicated with the outside of the core box through the process hole (24), and the core print (14) is inserted in the process hole (24).

2. The relay valve seat mold according to claim 1, wherein: the core (1) is provided with three core bodies, and the second core body (12) and the third core body (13) are arranged on the same side of the first core body (11).

3. The relay valve seat mold according to claim 1, wherein: the core print (14) is a cylinder, and the section of the fabrication hole (24) is circular.

4. The relay valve seat mold according to claim 1, wherein: the core box is a precoated sand core box manufactured by adopting a precoated sand process.

5. The relay valve seat mold according to claim 4, wherein: the precoated sand core box comprises a first precoated type box (21) and a second precoated type box (22), wherein the core (1) is positioned between the first precoated type box (21) and the second precoated type box (22), and the first precoated type box (21) is provided with the fabrication hole (24).

6. The relay valve seat mold according to claim 1, wherein: the relay valve seat mould further comprises a riser (31), wherein the riser (31) is arranged on the upper portion of the core box, and the riser (31) is a heating riser.