Riser bush knock-off core

Abstract

The utility model relates to the technical field of knock-off pieces, in particular to a riser bush knock-off piece which comprises a knock-off piece body, the knock-off piece body comprises an outer circle, a positioning ring, a knock-off piece middle hole and a bottom face, the knock-off piece middle hole is eccentrically arranged, a limiting part is arranged at the top of the outer circle and is an annular limiting strip or an annular groove, and the annular limiting strip is arranged at the top of the outer circle. The annular limiting strip is located on the outer side of the positioning ring, the annular limiting strip and the positioning ring are matched to limit the position of the riser bush, the annular groove is formed in the top of the outer circle, the annular groove and the outer circle are concentrically arranged, and the annular groove is located on the outer side of the positioning ring; the side face, close to the positioning ring, of the annular groove is tangent to the arc face, close to the annular groove, of the positioning ring. The utility model aims to solve the technical problem that the placement of the knock-off core at a corner is affected due to the fact that the distance between a middle hole of the knock-off core and the outer circle edge of the knock-off core is too large.

Description

Technical Field

[0001] The utility model relates to the technical field of easy-to-cut pieces, in particular to an easy-to-cut piece for a riser sleeve. Background Art

[0002] At present, in casting production, in order to avoid defects in castings, a riser structure is often provided above or on the side of the casting cavity of the casting device. The existing riser structure is generally composed of a riser sleeve and an easy-to-cut sheet arranged at the lower end of the riser sleeve and connected to the casting cavity. During casting, the riser cavity is a container for storing high-temperature liquid metal. The stored molten metal will be returned to the casting cavity during the cooling and shrinking process of the casting, thereby avoiding shrinkage holes or shrinkage in the casting to improve the density of the casting. The remaining molten metal in the riser cavity that is not returned to the casting cavity is formed into a casting riser connected to the casting body as the casting cools. The purpose of the easy-to-cut sheet is: first, to facilitate the separation of the casting riser and the casting body, to prevent the casting body from being damaged when separating the casting riser and the casting body; second, to facilitate the processing of the casting body after casting, and reduce the workload of post-casting processing.

[0003] In production, when compensating for shrinkage in long strip bosses, if existing easy-to-cut pieces are used, it will be difficult to select and place the riser. At the same time, the existing easy-to-cut pieces need to find the inner corner position before the riser and casting can be separated.

[0004] In order to solve the above problems, a Chinese utility model patent (publication number: CN208195574U) discloses a waist-shaped open riser easy-to-cut piece, which includes an easy-to-cut piece body, which is composed of an outer circle, a positioning ring, a middle hole of the easy-to-cut piece and a bottom surface. The central axes of the outer circle, the positioning ring, the middle hole and the bottom surface are coaxial; the upper side of the middle hole is a diffusion hole, and the lower side is a contraction hole. The middle hole is waist-shaped, and the outer shoulder of the positioning ring is arc-shaped.

[0005] In the specific implementation process of the above patent, since the hole in the easy-cut sheet needs to be placed directly above the shrinkage compensation part, the centering setting of the hole in the easy-cut sheet will maximize the distance from the hole in the easy-cut sheet to the edge of the outer circle of the easy-cut sheet. However, if the distance from the hole in the easy-cut sheet to the edge of the outer circle of the easy-cut sheet is too large, it will affect the placement of the easy-cut sheet at the corner. Utility Model Content

[0006] In view of this, the purpose of the utility model is to provide a riser sleeve easy-to-cut piece to solve the technical problem that the distance from the hole in the easy-to-cut piece to the outer edge of the easy-to-cut piece is too large, which affects the placement of the easy-to-cut piece at the corner.

[0007] The utility model is realized by the following technical solutions:

[0008] A riser sleeve easy-to-cut piece comprises an easy-to-cut piece body, wherein the easy-to-cut piece body comprises an outer circle, a positioning ring, a middle hole of the easy-to-cut piece and a bottom surface, and the middle hole of the easy-to-cut piece is eccentrically arranged.

[0009] Furthermore, the outer circular top is provided with a limiting portion for limiting the position of the riser sleeve.

[0010] Furthermore, the limiting portion is an annular limiting strip, which is arranged at the top of the outer circle and is concentric with the outer circle;

[0011] The annular limiting strip is located outside the positioning ring, and the annular limiting strip cooperates with the positioning ring to limit the position of the riser sleeve.

[0012] Furthermore, the top surface of the annular limiting strip is a first inclined surface.

[0013] Furthermore, a flow groove is formed on the side wall of the annular limit strip, and the flow groove extends along the height direction of the annular limit strip, and the upper end extends out of the top of the annular limit strip, and the lower end extends to the outer round top;

[0014] The outer circular top is provided with a plurality of protrusions for supporting the riser sleeve, and the protrusions are located between the annular limiting strip and the positioning ring.

[0015] Furthermore, the limiting portion is an annular groove, the annular groove is opened at the top of the outer circle, and the annular groove is concentrically arranged with the outer circle;

[0016] The annular groove is located on the outer side of the positioning ring, and the side surface of the annular groove close to the positioning ring is tangent to the arc surface of the positioning ring close to the annular groove.

[0017] Furthermore, the cross section of the annular groove is L-shaped, and a glue injection hole connected to the annular groove is opened on the top of the outer circle, and the glue injection hole is located outside the riser sleeve.

[0018] Furthermore, the bottom of the annular groove is provided with a plurality of protrusions for supporting the riser sleeve.

[0019] The beneficial effects of the utility model are:

[0020] The riser sleeve easy-cutting piece, by eccentrically setting the center hole of the easy-cutting piece, makes the distance from the center hole of the easy-cutting piece to the outer circle edge of the easy-cutting piece shorter than that in the prior art, and the size of the corner space has less influence on the placement of the easy-cutting piece, thereby making it more convenient to place the easy-cutting piece at the corner position.

[0021] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and will be apparent to those skilled in the art based on the following examination and research, or can be taught from the practice of the present invention to some extent. The objectives and other advantages of the present invention can be achieved and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model;

[0023] Figure 2 for Figure 1 A schematic cross-sectional structure diagram of ;

[0024] Figure 3 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0025] Figure 4 This is a schematic diagram of the structure after the riser sleeve is placed on the easy-to-cut piece in Example 1 of the utility model;

[0026] Figure 5 for Figure 4 A schematic cross-sectional structure diagram of ;

[0027] Figure 6 for Figure 5 A schematic diagram of the enlarged structure at B in the middle;

[0028] Figure 7 This is a schematic diagram of the structure of Embodiment 2 of the present utility model;

[0029] Figure 8 for Figure 7 A schematic cross-sectional structure diagram of ;

[0030] Fig. 9 for Figure 8 Schematic diagram of the enlarged structure at C in the middle;

[0031] Fig.10 This is a schematic diagram of the structure after the riser sleeve is placed on the easy-to-cut piece in Example 2 of the utility model;

[0032] Fig.11 for Fig.10 A schematic cross-sectional structure diagram of ;

[0033] Fig.12 for Fig.11 Schematic diagram of the enlarged structure at D in the middle.

[0034] In the figure: outer circle 1, positioning ring 2, hole in the easy-to-cut piece 3, bottom surface 4, annular limiting strip 5, first inclined surface 6, flow groove 7, raised portion 8, annular groove 9, glue injection hole 10, convex point 11, riser sleeve 12. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0036] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0038] In the above description of the utility model, it should be noted that the terms "one side", "the other side", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0039] In addition, the term "same" does not mean that the parts must be absolutely the same, but slight differences are allowed. The term "vertical" only means that the positional relationship between the parts is more vertical than "parallel", and does not mean that the structure must be completely vertical, but can be slightly tilted.

[0040] Example 1, please refer to Figure 1-6 The utility model provides a technical solution: a riser sleeve easy-to-cut piece, including an easy-to-cut piece body, the easy-to-cut piece body includes an outer circle 1, a positioning ring 2, an easy-to-cut piece middle hole 3 and a bottom surface 4, and the easy-to-cut piece middle hole 3 is eccentrically arranged.

[0041] When placing the easy-cut sheet on the hot riser at the corner, the hole 3 in the easy-cut sheet is eccentrically arranged so that the distance from the hole 3 in the easy-cut sheet to the edge of the outer circle 1 of the easy-cut sheet is shorter than that in the prior art, and the size of the corner space has less influence on the placement of the easy-cut sheet, thereby making it more convenient to place the easy-cut sheet at the corner.

[0042] In this embodiment: a limiting portion for limiting the position of the riser sleeve 12 is provided at the top of the outer circle 1 .

[0043] By arranging a limiting portion at the top of the outer circle 1, the limiting portion can limit the position of the riser sleeve 12, so that the position of the riser sleeve 12 is not easily changed.

[0044] In this embodiment: the limiting portion is an annular limiting strip 5, and the annular limiting strip 5 is arranged at the top of the outer circle 1 and is concentric with the outer circle 1;

[0045] The annular limiting strip 5 is located outside the positioning ring 2 , and the annular limiting strip 5 cooperates with the positioning ring 2 to limit the position of the riser sleeve 12 .

[0046] The annular limiting strip 5 is fixedly connected to the top of the outer circle 1, and a limiting space is formed between the annular limiting strip 5 and the positioning ring 2. The bottom of the riser sleeve 12 is located in the limiting space, and the opposite side of the annular limiting strip 5 and the positioning ring 2 is respectively in contact with the inner and outer side walls of the riser sleeve 12;

[0047] When in use, first place the easy-to-cut sheet flat on the ground, and use the bottom surface 4 of the easy-to-cut sheet as a supporting surface to support the easy-to-cut sheet. Then slowly move the riser sleeve 12 so that the bottom of the riser sleeve 12 is just stuck into the limiting space between the annular limiting strip 5 and the positioning ring 2, and then use high-temperature glue to glue the easy-to-cut sheet and the riser sleeve 12 together. After the high-temperature glue cools, the riser sleeve 12 and the easy-to-cut sheet are connected.

[0048] By inserting the bottom end of the riser sleeve 12 into the limiting space between the annular limiting strip 5 and the positioning ring 2, the cooperation between the annular limiting strip 5 and the positioning ring 2 limits the position of the riser sleeve 12, so that the position of the riser sleeve 12 is not easily changed.

[0049] In this embodiment, the top surface of the annular limiting strip 5 is a first inclined surface 6 .

[0050] The specific inclination direction of the first inclined surface 6 is that the top of the annular limiting strip 5 is inclined downward near the positioning ring 2. By setting the top surface of the annular limiting strip 5 as the first inclined surface 6, a groove-shaped glue injection space with a triangular cross-section is formed between the first inclined surface 6 and the outer side wall of the riser sleeve 12. When the riser sleeve 12 is bonded to the easy-to-cut sheet, high-temperature glue is injected into the groove-shaped glue injection space to achieve bonding between the riser sleeve 12 and the easy-to-cut sheet.

[0051] In this embodiment: the side wall of the annular limiting strip 5 is provided with a flow groove 7, the flow groove 7 extends along the height direction of the annular limiting strip 5, and the upper end extends out of the top of the annular limiting strip 5, and the lower end extends to the top of the outer circle 1;

[0052] A plurality of raised portions 8 for supporting the riser sleeve 12 are arranged on the top of the outer circle 1 , and the raised portions 8 are located between the annular limiting strip 5 and the positioning ring 2 .

[0053] The raised portion 8 is hemispherical. The raised portion 8 supports the riser sleeve 12 so that the bottom of the riser sleeve 12 does not directly contact the top of the outer circle 1. A glue injection cavity is formed between the bottom of the riser sleeve 12 and the top of the outer circle 1. The glue injection cavity is connected to the triangular groove-shaped glue injection space through the flow groove 7. During glue injection and bonding, the high-temperature glue flows from the triangular groove-shaped glue injection space through the flow groove 7 into the glue injection cavity, thereby increasing the bonding area of ​​the high-temperature glue and thereby increasing the bonding effect.

[0054] Example 2, please refer to Figure 7-12 The difference between this embodiment and embodiment 1 is that the limiting portion is an annular groove 9, the annular groove 9 is opened at the top of the outer circle 1, and the annular groove 9 is concentrically arranged with the outer circle 1;

[0055] The annular groove 9 is located outside the positioning ring 2 , and the side surface of the annular groove 9 close to the positioning ring 2 is tangent to the arc surface of the positioning ring 2 close to the annular groove 9 .

[0056] The bottom of the riser sleeve 12 is located in the annular groove 9 , and the annular groove 9 limits the position of the riser sleeve 12 , so that the position of the riser sleeve 12 is not easily changed.

[0057] In this embodiment, the cross section of the annular groove 9 is L-shaped, and a glue injection hole 10 communicating with the annular groove 9 is opened at the top of the outer circle 1 . The glue injection hole 10 is located outside the riser sleeve 12 .

[0058] After the riser sleeve 12 is placed on the easy-to-cut sheet, there is a glue injection space between the bottom of the riser sleeve 12 and the side wall of the annular groove 9. When in use, high-temperature glue is directly injected from the glue injection hole 10 to achieve bonding between the riser sleeve 12 and the easy-to-cut sheet.

[0059] In this embodiment: a plurality of protrusions 11 for supporting the riser sleeve 12 are arranged at the bottom of the annular groove 9 .

[0060] The convex point 11 is hemispherical. The convex point 11 supports the riser sleeve 12 so that the bottom of the riser sleeve 12 does not directly contact the bottom of the annular groove 9. A glue injection cavity is formed between the bottom of the riser sleeve 12 and the bottom of the annular groove 9. The glue injection cavity is connected with the glue injection hole 10 through the annular groove 9. During bonding, the high-temperature glue flows from the glue injection hole 10 through the annular groove 9 into the glue injection cavity, which increases the bonding area of ​​the high-temperature glue and thereby increases the bonding effect.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A riser sleeve easy-to-cut piece, comprising an easy-to-cut piece body, wherein the easy-to-cut piece body comprises an outer circle, a positioning ring, a hole in the easy-to-cut piece and a bottom surface, characterized in that: The hole in the easy-to-cut piece is eccentrically arranged; a limiting portion for limiting the position of the riser sleeve is arranged at the top of the outer circle; the limiting portion is an annular limiting strip, which is arranged at the top of the outer circle and concentrically arranged with the outer circle; the annular limiting strip is located outside the positioning ring, and the annular limiting strip cooperates with the positioning ring to limit the position of the riser sleeve.

2. A riser sleeve easy-to-cut piece according to claim 1, characterized in that: The top surface of the annular limiting strip is a first inclined surface.

3. A riser sleeve easy-to-cut piece according to claim 2, characterized in that: The side wall of the annular limiting strip is provided with a flow groove, which extends along the height direction of the annular limiting strip, and the upper end of the flow groove extends out of the top of the annular limiting strip, and the lower end extends to the outer round top; The outer circular top is provided with a plurality of protrusions for supporting the riser sleeve, and the protrusions are located between the annular limiting strip and the positioning ring.

4. A riser sleeve easy-to-cut piece according to claim 3, characterized in that: The limiting portion is an annular groove, which is opened at the top of the outer circle and is concentric with the outer circle; The annular groove is located outside the positioning ring, and the side surface of the annular groove close to the positioning ring is tangent to the arc surface of the positioning ring close to the annular groove.

5. A riser sleeve easy-to-cut piece according to claim 4, characterized in that: The cross section of the annular groove is L-shaped, and a glue injection hole communicating with the annular groove is provided on the top of the outer circle, and the glue injection hole is located outside the riser sleeve.

6. A riser sleeve easy-to-cut piece according to claim 5, characterized in that: The bottom of the annular groove is provided with a plurality of convex points for supporting the riser sleeve.

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