A high-pressure heat-insulating riser sleeve for clay sand extrusion production line

Abstract

This utility model discloses a high-pressure heat-insulating riser sleeve for clay sand extrusion production lines in the field of metal gravity casting. It includes a pressure-resistant heat-insulating sleeve, a riser neck, and a connecting piece. This utility model solves the problem that conventional heat-insulating riser sleeves cannot withstand molding pressure by optimizing the size and internal structure of the riser and by using an interference fit to connect the pressure-resistant heat-insulating sleeve and the riser neck. During molding, the riser is tightly wrapped by molding sand, and there is no possibility of it falling off. It can adapt to the use environment under high pressure conditions.

Description

Technical Field

[0001] This utility model relates to the field of metal gravity casting technology, specifically to a high-pressure heat-insulating riser sleeve for use in clay sand extrusion production lines. Background Technology

[0002] In the field of gravity casting of metal, after the liquid metal is filled into the mold, it will shrink in volume during the solidification process from liquid to solid. In particular, defects such as depressions, shrinkage cavities, and porosity will occur in the last solidified part. In order to obtain complete and qualified castings, risers must be used to compensate for the shrinkage.

[0003] Due to the variety of molding equipment and castings, the pressure setting of molding machines is usually between 6 and 13 kg. Existing conventional heating and insulation riser sleeves do not have the ability to withstand pressure and are difficult to adapt to such operating conditions. Utility Model Content

[0004] The purpose of this section is to outline some aspects of the embodiments of this utility model and to briefly introduce some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be used to limit the scope of this utility model.

[0005] In view of the problem that conventional heating and insulating riser sleeves cannot be used under pressure in clay sand extrusion production lines, this utility model is proposed.

[0006] Therefore, the purpose of this utility model is to provide a high-pressure heat-insulating riser sleeve for clay sand extrusion production line. By optimizing the size and internal structure of the riser, and by connecting the pressure-resistant heat-insulating sleeve and the riser neck with an interference fit, the problem that conventional heat-insulating riser sleeves cannot withstand molding pressure is solved, and it can adapt to the use environment under high pressure conditions.

[0007] To solve the above-mentioned technical problems, according to one aspect of the present invention, the present invention provides the following technical solution:

[0008] A high-pressure heat-generating insulating riser sleeve for a clay sand extrusion production line, comprising:

[0009] A pressure-resistant heating sleeve, wherein the pressure-resistant heating sleeve has an inner cavity with an opening at the bottom;

[0010] The riser neck is located inside the pressure-resistant heating sleeve. The outer diameter of the top of the riser neck is smaller than the inner diameter of the bottom opening of the inner cavity. The riser neck is interference-fitted into the inner cavity.

[0011] As a preferred embodiment of the high-pressure heat-insulating riser sleeve for clay sand extrusion production line described in this utility model, the top of the inner cavity has a conical cavity to increase the vertical compressive strength of the heat-insulating sleeve, the bottom of the riser neck has a conical connecting part to achieve riser necking, the adhesive of the heat-insulating sleeve is cold core box resin, and the riser neck is a bowl-shaped structure made of metal.

[0012] As a preferred embodiment of the high-pressure heat-insulating riser sleeve for clay sand extrusion production line described in this utility model, the bottom of the inner cavity has a cylindrical cavity, the top of the riser neck has a cylindrical connecting part, and the outer diameter of the cylindrical connecting part is smaller than the inner diameter of the cylindrical cavity.

[0013] As a preferred embodiment of the high-pressure heat-insulating riser sleeve for a clay sand extrusion production line described in this utility model, it further includes a connecting piece made of elastic metal material, comprising a vertical plate, a clamping part at the top of the vertical plate, and a limiting plate at the bottom of the vertical plate. The clamping part is engaged with the top of the cylindrical connecting part. When the cylindrical connecting part and the clamping part extend into the cylindrical cavity, the bottom of the pressure-resistant heat-insulating sleeve abuts against the top of the limiting plate, so that the riser neck will not retract into the inner cavity under normal pressure, but under high pressure, the limiting plate deforms, at which time the riser neck can retract into the inner cavity. The length of the vertical plate determines the depth to which the riser neck is installed into the inner cavity.

[0014] Compared with existing technologies, by optimizing the size and internal structure of the riser and connecting the pressure-resistant heating sleeve and the riser neck with an interference fit, the problem that conventional heating and heat-insulating riser sleeves cannot withstand molding pressure is solved. During molding, the riser is tightly wrapped by molding sand, and there is no possibility of it falling off, which can adapt to the use environment under high pressure conditions. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and detailed embodiments. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Among them:

[0016] Figure 1 This is a structural diagram of a high-pressure heat-insulating riser sleeve for a clay sand extrusion production line according to the present invention.

[0017] Figure 2 This is a schematic diagram of a high-pressure heat-insulating riser sleeve for a clay sand extrusion production line, in which the riser neck is fully inserted into the interior of the pressure-resistant heat-insulating sleeve.

[0018] Figure 3 This is a structural diagram of a high-pressure heat-insulating riser sleeve for clay sand extrusion production line according to the present invention.

[0019] Figure 4 This is a structural diagram of a high-pressure heat-insulating riser sleeve and riser neck for a clay sand extrusion production line according to the present invention.

[0020] Figure 5 This is a structural diagram of a high-pressure heat-insulating riser sleeve connecting piece for use in a clay sand extrusion production line, according to the present invention. Detailed Implementation

[0021] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0022] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views showing the device structure may be partially enlarged, not according to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, in actual manufacturing, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0024] This invention provides a high-pressure heat-insulating riser sleeve for clay sand extrusion production lines. By optimizing the size and internal structure of the riser, it solves the problem that conventional heat-insulating riser sleeves cannot withstand molding pressure and can adapt to high-pressure environments.

[0025] Figure 1-4 The diagram shown is a structural schematic of one embodiment of a high-pressure heat-insulating riser sleeve for a clay sand extrusion production line according to this utility model. Please refer to [link / reference]. Figures 1-4 The high-pressure heat-insulating riser sleeve for a clay sand extrusion production line according to this embodiment includes a pressure-resistant heat-insulating sleeve 100, a riser neck 200, and a connecting piece 300.

[0026] The pressure-resistant heating sleeve 100 has an inner cavity 110 with an opening at the bottom and a conical cavity 120 at the top to increase the vertical pressure resistance of the pressure-resistant heating sleeve 100. The bottom of the inner cavity 110 has a cylindrical cavity 130 with no draft angle to allow sufficient space for the retraction of the riser neck 200. The internal design of the inner cavity 110 increases the vertical pressure resistance. The adhesive of the pressure-resistant heating sleeve 100 uses cold box resin to further strengthen the riser and give it very high dimensional accuracy. This is an important prerequisite for ensuring stable assembly and expansion / contraction of the riser and riser neck.

[0027] The riser neck 200 is located inside the pressure-resistant heating sleeve 100. The outer diameter of the top of the riser neck 200 is smaller than the inner diameter of the bottom opening of the inner cavity 110. The bottom of the riser neck 200 has a tapered connecting part 210 for rising necking. The riser neck 200 is made of metal with high dimensional accuracy, strong vertical compressive strength, and toughness. Even if it deforms under high pressure, it will not have a problem with deformation. The top of the riser neck 200 has a cylindrical connecting part 220. The outer diameter of the cylindrical connecting part 220 is smaller than the inner diameter of the cylindrical cavity 130 so that it can retract into the cylindrical cavity 130 without obstruction when under pressure. The tapered connecting part 210 realizes rising necking, which facilitates feeding and removal of the riser. It is precisely because of the tapered shape that the diameter is changed that the problem of the use of conventional heating and insulation sleeves being limited due to the special casting structure is solved. The cylindrical connecting part 220 is used for assembly and expansion and contraction with the cylindrical cavity 130. Reasonable assembly gap and retraction distance are the most important factors to ensure the pressure resistance of the riser.

[0028] The connecting piece 300 is made of elastic metal material and includes a vertical plate 310, a clamping part 320 located at the top of the vertical plate 310, and a limiting plate 330 located at the bottom of the vertical plate 310. The clamping part 320 is engaged with the top of the cylindrical connecting part 220. When the cylindrical connecting part 220 and the clamping part 320 extend into the cylindrical cavity 130, the bottom of the pressure-resistant heating sleeve 100 abuts against the top of the limiting plate 330, so that under normal pressure, the riser neck 200 will not retract into the inner cavity 110, but under high pressure, the limiting plate 330 deforms, at which time the riser neck 200 can retract into the inner cavity 110, and the vertical plate 310... The length determines the depth to which the riser neck 200 is installed into the inner cavity 110. After the connecting part 320 is connected to the top of the cylindrical connecting part 220, the bottom of the pressure-resistant heating sleeve 100 abuts against the top of the limiting plate 330, and the riser neck 200 is inserted into the cylindrical cavity 130. The riser neck 200 plus the thickness of the vertical plate 320 can make the riser neck 200 snap into the inside of the cylindrical cavity 130, so that the riser neck 200 and the pressure-resistant heating sleeve 100 are tightly fitted together. When subjected to high pressure, the limiting plate 330 is deformed by pressure and fits against the outer wall of the cylindrical connecting part 220, and extends into the inside of the cylindrical cavity 130 along with the cylindrical connecting part 220.

[0029] Combination Figures 1-4 In this embodiment, a high-pressure heat-insulating riser sleeve for a clay sand extrusion production line is provided. When connecting the pressure-resistant heat-insulating sleeve 100 to the riser neck 200, the connecting part 320 is first snapped onto the top of the cylindrical connecting part 220, and the vertical plate 310 is connected to the outer wall of the cylindrical connecting part 220. In this way, multiple connecting pieces 300 are connected around the top of the cylindrical connecting part 220, and the cylindrical connecting part 220 is pushed into the cylindrical cavity 130. The cylindrical connecting part 220 is connected to the inside of the cylindrical cavity 130 through an interference fit. The pressure-resistant heat-insulating sleeve 100 achieves a variable diameter through the tapered connecting part 210, and only requires a very small contact area with the casting.

[0030] In another embodiment of this application, not shown in the figures, a connecting piece 300 is used to achieve an interference fit between the riser neck 200 and the pressure-resistant heating sleeve 100. The connecting piece 300 can also be installed with the riser neck 200 by welding, or it can be integrally stamped out when manufacturing the riser neck 200. Alternatively, the interference fit between the riser neck 200 and the pressure-resistant heating sleeve 100 can be achieved without the connecting piece structure. Instead, several protrusions are stamped from the inside to the outside of the cylindrical connecting part 220 of the riser neck 200. When connecting the riser neck 200 and the pressure-resistant heating sleeve 100, the cylindrical connecting part 220 is inserted into the cylindrical cavity 130. The protrusions on the outer wall of the cylindrical connecting part 220 achieve an interference fit with the cylindrical cavity 130, thus connecting the riser neck 200 and the pressure-resistant heating sleeve 100 through the interference fit.

[0031] Although the present invention has been described above with reference to embodiments, various modifications can be made and components can be replaced with equivalents without departing from the scope of the present invention. In particular, as long as there is no structural conflict, the features in the embodiments disclosed in this invention can be combined with each other in any way. The lack of an exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A high pressure resistant heat generating insulating riser sleeve for clay sand extrusion production line, characterized in that, include: A pressure-resistant heating sleeve (100) has an inner cavity (110) inside, and the bottom of the inner cavity (110) is open; A riser neck (200) is located inside the pressure-resistant heating sleeve (100). The outer diameter of the top of the riser neck (200) is smaller than the inner diameter of the bottom opening of the inner cavity (110). The riser neck (200) is interference-fitted into the inner cavity (110). The bottom of the inner cavity (110) has a cylindrical cavity (130). The top of the riser neck (200) has a cylindrical connecting part (220). The outer diameter of the cylindrical connecting part (220) is smaller than the inner diameter of the cylindrical cavity (130). It also includes a connecting piece (300) made of elastic metal material, comprising a vertical plate (310), a clamping part (320) at the top of the vertical plate (310), and a limiting plate (330) at the bottom of the vertical plate (310). The clamping part (320) is engaged with the top of the cylindrical connecting part (220). When the cylindrical connecting part (220) and the clamping part (320) extend into the cylindrical cavity (130), The bottom of the pressure-resistant heating sleeve (100) abuts against the top of the limiting plate (330), so that when it faces normal pressure, the riser neck (200) will not retract into the inner cavity (110). However, when subjected to high pressure, the limiting plate (330) deforms, and the riser neck (200) can retract into the inner cavity (110). The length of the vertical plate (310) determines the depth to which the riser neck (200) is installed into the inner cavity (110).

2. A high pressure resistant heat generating insulating riser sleeve for clay sand extrusion production line according to claim 1, characterized in that, The inner cavity (110) has a conical cavity (120) at the top to increase the vertical compressive strength of the pressure-resistant heating sleeve (100). The riser neck (200) has a conical connecting part (210) at the bottom to achieve riser necking. The adhesive of the pressure-resistant heating sleeve (100) is cold core box resin. The riser neck (200) is a bowl-shaped structure made of metal.

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