CN218252774U

CN218252774U - Lost foam riser

Info

Publication number: CN218252774U
Application number: CN202221970249.1U
Authority: CN
Inventors: 蔡志飞; 王守文
Original assignee: Luoyang Shunhua Heavy Industry Co ltd
Current assignee: Luoyang Shunhua Heavy Industry Co ltd
Priority date: 2022-07-28
Filing date: 2022-07-28
Publication date: 2023-01-10
Anticipated expiration: 2032-07-28

Abstract

The utility model provides a disappearance mould rising head, is used for connecting the rising head body of foundry goods including the bottom and around the casing that generates heat that rising head body outer wall set up, the casing that generates heat is equipped with heat conduction material layer, material layer and heat preservation from inside to outside in proper order, the top of the casing that generates heat is equipped with the lid on closing cap heat conduction material layer, material layer and heat preservation, intercommunication rising head body is close to the casing bottom department that generates heat and is equipped with the air duct that stretches out the casing setting that generates heat, the tip that the air duct stretches out the casing that generates heat can be dismantled and is equipped with the head. The utility model discloses can effectively avoid this internal negative pressure that appears of rising head to at this internal top of rising head solidification back, the bottom is in the effect that liquid metal still can play the feeding, promotes the feeding ability of rising head.

Description

Lost foam riser

Technical Field

The utility model relates to a casting technical field, concretely relates to disappearance mould rising head.

Background

The riser is a cavity used for storing molten metal in the casting mould, supplies the molten metal when a casting is formed, and has the functions of preventing shrinkage cavity, shrinkage porosity, exhaust and slag collection. In the lost foam casting production, the top of the pouring channel and the top of the riser used for liquid supplement are both arranged outside filler in the sand box, and as the top of the riser is directly exposed in the air, the molten metal in the riser is cooled too quickly under the heat preservation effect of the filler, so as to prevent the molten metal in the riser from being cooled too quickly and improve the process yield of castings, and the outer wall of the riser is required to be coated with heat preservation materials completely.

However, after the outer wall of the existing riser is provided with a heat insulating or heating material, although the overall cooling efficiency of molten metal can be delayed, the top of the riser is in direct contact with the atmosphere, so that heat dissipation is fast, the situation that the top of the riser is solidified first still sometimes appears, after the top of the riser is solidified, the liquid part in the riser is difficult to be fed due to negative pressure in the riser, so that the feeding capacity of the riser is limited, and the feeding effect is general.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a disappearance mould rising head, it can make the rising head continue to keep better feeding effect under the earlier solidification circumstances in rising head top.

The utility model discloses a reach the technical scheme that above-mentioned purpose adopted and be:

the utility model provides a disappearance mould rising head, is used for connecting the rising head body of foundry goods including the bottom and around the casing that generates heat that rising head body outer wall set up, the casing that generates heat is equipped with heat conduction material layer, material layer and heat preservation from inside to outside in proper order, the top of the casing that generates heat is equipped with the lid on closing cap heat conduction material layer, material layer and heat preservation, intercommunication rising head body is close to the casing bottom department that generates heat and is equipped with the air duct that stretches out the casing setting that generates heat, the tip that the air duct stretches out the casing that generates heat can be dismantled and is equipped with the head.

As a preferred scheme of the utility model, the head screw thread is installed at the air duct tip.

As an optimal proposal of the utility model, the air duct runs through the heat conduction material layer and stretches out the cover body.

As a preferred scheme of the utility model, the air duct vertically runs through the heat conduction material layer.

As an optimized proposal of the utility model, the air duct spirally passes through the heat conducting material layer around the riser body.

As an optimized scheme of the utility model, the air duct is close to the casing bottom department that generates heat with the rising head body and is the slant intercommunication down.

As an optimized scheme of the utility model, lid demountable installation is at the top of the casing that generates heat.

As a preferred scheme of the utility model, the bottom of the casing that generates heat is equipped with the toper cover, and the heavy-calibre end of toper cover is connected to the casing that generates heat, and the inside of toper cover is equipped with along the axial and is used for the through-hole that the rising head body runs through.

As an optimal scheme of the utility model, the toper cover sets up with as an organic whole between the casing that generates heat.

As a preferred scheme of the utility model, for dismantling the setting between toper cover and the casing that generates heat.

The utility model discloses beneficial effect:

1. the utility model discloses a disappearance mould rising head can effectively avoid this internal negative pressure that appears of rising head through the air duct that can communicate atmosphere and rising head body bottom at the heat conduction material layer setting to guarantee that the inherent top of rising head body solidifies the back, the bottom is in the effect that liquid metal still can play the feeding, promotes the feeding ability of rising head.

2. The utility model discloses a disappearance mould rising head is through running through the air duct and leading to the setting of thermal material layer, can effectively preheat the air that gets into the rising head body, reduces the condensing velocity of molten metal, further improves the feeding ability of rising head.

Drawings

Fig. 1 is a schematic structural diagram of a lost foam riser provided in example 1;

fig. 2 is a schematic structural diagram of a lost foam riser provided in embodiment 2.

The labels in the figure are: 1. the riser comprises a riser body, 2 parts of a conical sleeve, 3 parts of a heating shell, 4 parts of a heating material layer, 5 parts of a cover body, 6 parts of an air duct, 7 parts of an end socket, 8 parts of a heat conduction material layer, 9 parts of a heat insulation layer, 10 parts of a casting.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments, wherein in the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.

The utility model provides an embodiment 1 of disappearance mould rising head:

referring to fig. 1, the evaporative pattern casting head of the present embodiment includes a casting head body 1 and a heating shell 3, wherein the bottom of the casting head body 1 is used for connecting a casting 10, when in use, after the casting 10 is connected to the bottom of the casting head body 1, the bottom of the casting head body 1 and the casting 10 are placed together in a sand box, the heating shell 3 is disposed around the outer wall of the casting head body 1, specifically, a through hole adapted to the casting head body 1 may be disposed in the heating shell 3, the heating shell 3 is sleeved on the casting head body 1, the heating shell 3 is sequentially provided with a heat conducting material layer 8, a heating material layer 4 and a heat insulating layer 9 from inside to outside, it is understood that, for the heating shell 3, cavities filled with layers may be sequentially disposed from inside to outside, a hollow cavity may also be disposed, the heat conducting material layer 8, the heating material layer 4 and the heat insulating layer 9 are sequentially filled from inside to outside, a cover body 5 is disposed on the top of the heating shell 3, the cover body 5 is used for sealing the heat conducting material layer 8, the heating material layer 4 and the heat insulating layer 9, specifically, the heat conducting material layer 8, the heating material layer and the heat insulating layer are made of a heat conducting material, for example, a heat conducting material prepared by using aluminum thermal conductive agent and a heat-resistant material, and a heat-resistant material prepared by a better heat-resistant cotton than a heat-resistant material.

As mentioned above, the top of the riser body 1 is in direct contact with the atmosphere, so that heat dissipation is fast, and sometimes the top of the riser is solidified first, after the top is solidified, the liquid part in the riser can only be slightly fed, and then the riser is difficult to further feed due to negative pressure in the riser, so that the feeding effect of the riser is greatly limited, therefore, the lost foam riser of the embodiment further comprises an air duct 6, one end of the air duct 6 is communicated with the riser body 1, the communication part is located at the position, close to the bottom of the heating shell 3, of the riser body 1, the other end of the air duct 6 extends out of the heating shell 3 for communicating with the atmosphere, understandably, in the embodiment, the cover body 5 is correspondingly provided with a through hole for the air duct 6 to penetrate through, can dismantle at the tip that the casing 3 that generates heat is stretched out at air duct 6 and be equipped with head 7, head 7 is used for shutoff air duct 6, in order to guarantee under the unset circumstances in rising head top that the air duct 6 is in the state of not ventilating, avoid further expanding the heat-sinking capability in the rising head body 1, delay the cooling of metal liquid, after the top metal liquid appears solidifying in rising head body 1, open head 7 and make air duct 6 communicate with each other with the atmosphere, negative pressure appears in avoiding rising head body 1, thereby guarantee to be in the interior liquid metal of rising head body 1 and still can play the effect of feeding, thereby can make the rising head can continue to keep better feeding effect under the circumstances of solidifying earlier in rising head top.

As shown in the combined drawing 1, the end socket 7 can be installed at the end part of the air duct 6 in a threaded manner when being used specifically, an external thread is arranged at the end part of the air duct 6, an internal thread is arranged in the end socket 7, a sealing washer can be arranged in the end socket 7, and when the end socket 7 needs to be taken down, the air duct 6 can be communicated with the atmosphere only by rotating and taking out.

As before, after the molten metal in the top of the riser body 1 solidifies, the sealing head 7 is opened to communicate the air duct 6 with the atmosphere, so that the atmosphere can enter the riser body 1, thereby avoiding negative pressure, but the solidification of the molten metal in the riser body 1 can be accelerated after the atmosphere enters, in this embodiment, the air duct 6 penetrates through the heat conducting material layer 8 and then extends out of the cover body 5, and the air entering the riser body 1 through the air duct 6 can be preheated when passing through the heat conducting material layer 8, thereby reducing the influence on the molten metal solidification caused by the atmosphere entering the riser body 1.

As shown in a combined figure 1, the air duct 6 vertically penetrates through the heat conducting material layer 8, the lower end of the air duct is arranged in an L shape, the horizontal section is communicated with the riser body 1, and the air duct 6 is a universal L-shaped pipe fitting.

In this embodiment, lid 5 demountable installation can adopt screw demountable installation at the top of the casing 3 that generates heat during specific installation, conveniently opens lid 5 and changes each layer material, when demountable installation, can reference the demountable installation structure that CN202021226865.7 disclosed.

In this embodiment, the bottom of the heating shell 3 is provided with the conical sleeve 2, the large-diameter end of the conical sleeve 2 is connected to the heating shell 3, and the conical sleeve 2 is provided with a through hole for the riser body 1 to penetrate through along the axial direction, that is, the riser body 1 penetrates through the heating shell 3 and the conical sleeve 2, when the heating shell 3 is placed into the sand box along with the riser body 1, the conical sleeve can obviously reduce the resistance between the heating shell 3 and the filler in the sand box, so that the position of the heating shell 3 can be further finely adjusted after the heating shell 3 is placed into the sand box, and the best heat preservation effect is achieved.

The taper sleeve 2 and the heating shell 3 can be arranged integrally, can also be detachably connected through threads and the like, and can be taken down by the taper sleeve 2 when being detachably arranged, so that the length of the riser body 1 is reduced, and the casting feeder is suitable for small-sized castings 10.

The utility model provides an embodiment 2 of disappearance mould rising head:

different from embodiment 1, as shown in fig. 2, the gas-guide tube 6 of the evaporative pattern riser of this embodiment does not adopt an L-shaped member when being set, and can be set integrally with the riser body 1, and the bottom of the gas-guide tube 6 is communicated with the bottom of the riser body 1 near the heating shell 3, and is communicated with the riser body 1 obliquely downward, that is, the channel at the joint is no longer horizontally arranged in embodiment 1, so that the phenomenon that the gas-guide tube 6 is blocked after the gas-guide tube 6 is thermally condensed due to residual metal can be effectively reduced, and the gas-guide tube 6 can be used normally for a long time.

In other embodiments, the gas-guide tube 6 may also be arranged to spirally penetrate through the heat-conductive material layer 8 around the riser body 1, that is, the gas-guide tube 6 is spirally wound around the riser body 1 in the heat-conductive material layer 8 and finally extends out of the heating shell 3, and the extending portion may be arranged in a vertical shape.

It should be noted that, although the prior art has not been described in detail herein, the above embodiments are merely provided to illustrate the present invention, but the present invention is not limited to the above embodiments, and any simple modifications, equivalent changes and modifications made to the above embodiments according to the technical spirit of the present invention all fall within the scope of the present invention.

Claims

1. The utility model provides a disappearance mould rising head, be used for connecting rising head body (1) of foundry goods (10) including the bottom and around the casing (3) that generate heat that rising head body (1) outer wall set up, the casing (3) that generate heat is equipped with heat conducting material layer (8) from inside to outside in proper order, generate heat material layer (4) and heat preservation (9), the top of the casing (3) that generates heat is equipped with lid heat conducting material layer (8), lid (5) of the material layer (4) and heat preservation (9) of generating heat, its characterized in that: the communicating riser body (1) is provided with an air duct (6) extending out of the heating shell (3) at the position close to the bottom of the heating shell (3), and the end part of the air duct (6) extending out of the heating shell (3) is detachably provided with a seal head (7).

2. A lost foam riser as claimed in claim 1, wherein said closure head (7) is screw-threaded at the end of the gas duct (6).

3. An evaporative pattern riser as claimed in claim 1 in which the gas-conducting tube (6) extends through the layer (8) of heat-conducting material and out of the cover (5).

4. A lost foam riser as claimed in claim 3, wherein said gas-conducting tube (6) is arranged vertically through the layer (8) of heat-conducting material.

5. An evanescent mode riser as claimed in claim 1, wherein said gas-guiding tube (6) is in downward communication with the riser body (1) near the bottom of the exothermic shell (3).

6. An evanescent mould riser as claimed in claim 5, characterised in that said gas-conducting tube (6) is arranged helically through the layer (8) of heat-conducting material around the riser body (1).

7. An evanescent mould riser as claimed in claim 1, characterised in that said cover (5) is removably mounted on top of the exothermic housing (3).

8. An evanescent mould riser as claimed in any one of claims 1 to 7, characterised in that the bottom of the heating shell (3) is provided with a conical sleeve (2), the large-diameter end of the conical sleeve (2) being connected to the heating shell (3), and the interior of the conical sleeve (2) being provided axially with a through hole for the passage of the riser body (1).

9. An evanescent mould riser as claimed in claim 8, characterised in that said conical sleeve (2) is integral with said heating shell (3).

10. An evanescent mould riser as claimed in claim 8, characterised in that said conical sleeve (2) is removably arranged with respect to said heating shell (3).