Riser bush combined structure for V-method casting

Abstract

The utility model relates to the related technical field of V-method casting, in particular to a riser bush combined structure for V-method casting, which comprises an exhaust funnel, a connecting ring is arranged on the surface of the bottom end of the exhaust funnel, a breathable riser bush main body is arranged at the bottom end of the connecting ring, and a knock-off core main body is arranged at the bottom end of the breathable riser bush main body. A bottom sealing bonding sheet is arranged at the bottom end of the knock-off core main body, and plastic films are arranged on the outer surfaces of the exhaust funnel, the breathable riser bush main body and the knock-off core main body. The improved riser bush combined structure for V-method casting is provided with the knock-off piece main body and the bottom sealing bonding piece, the bottom sealing bonding piece is used for sealing the knock-off piece main body and the plastic film, the bottom sealing bonding piece at the bottom of the knock-off piece main body is bonded with the plastic film after a riser is placed, and the side face of the knock-off piece main body does not need to be bonded with an adhesive tape any more. Therefore, the table below the riser can be positioned without or with a low riser, and the polishing cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field related to V-method casting, in particular to a riser sleeve combined structure for V-method casting. Background Art

[0002] V-method casting is a negative pressure casting method of physical modeling. V-method casting is to seal the cavity surface and back surface of the sand mold through a sealing film, so that there is a pressure difference inside and outside the mold, making the dry sand dense and forming the required cavity. The application scope of V-method casting in castings such as cast steel is constantly expanding;

[0003] During the pouring process, after the molten iron enters the cavity, the gas inside it is discharged through the riser sleeve. This is because the molten iron entering the cavity causes the gas inside it to expand due to heat, but the film on the surface of the riser sleeve has not melted yet, so the gas inside the cavity cannot be extracted.

[0004] In the process of realizing the utility model, the inventors found that the prior art had the following problems: 1. The positioning platform under the riser of the traditional V-method casting riser sleeve combination structure cannot be made very low, which increases the cleaning and polishing process for employees in the later stage and wastes costs; 2. The process of sealing with adhesive tape is too cumbersome for users of the traditional V-method casting riser sleeve combination structure. Utility Model Content

[0005] The purpose of the utility model is to provide a riser sleeve combination structure for V-method casting, so as to solve the problems mentioned in the above background technology that the bottom end positioning of the traditional riser sleeve combination structure for V-method casting requires subsequent cleaning and polishing, which affects the cost budget, and the bottom end bonding tape sealing process is relatively cumbersome. In order to achieve the above purpose, the utility model provides the following technical solutions: a riser sleeve combination structure for V-method casting, comprising an exhaust pipe, the bottom end surface of the exhaust pipe is provided with a connecting ring, and the bottom end of the connecting ring is provided with a breathable riser sleeve body, the bottom end of the breathable riser sleeve body is provided with an easy-to-cut sheet body, and the bottom end of the easy-to-cut sheet body is provided with a bottom sealing adhesive sheet;

[0006] The outer surfaces of the exhaust pipe, the air-permeable riser sleeve body and the easy-to-cut sheet body are all provided with plastic films, and a V-shaped protrusion is provided in the middle of the upper end of the inner wall of the air-permeable riser sleeve body, an upward slope is provided above the middle of the easy-to-cut sheet body, and a downward slope is provided at the lower end of the upward slope, and an annular supporting surface is provided on the upper side of the upper end surface of the upward slope.

[0007] Further preferably, the air permeable riser sleeve body includes a riser sleeve body and the V-shaped protrusion, and the upper end surface of the V-shaped protrusion is fixed to the middle surface of the upper end of the inner wall of the air permeable riser sleeve body, and the air permeable riser sleeve body is made of a material with excellent air permeability.

[0008] Further preferably, the easy-to-cut piece body includes an easy-to-cut piece, the upper bevel and the lower bevel, and the outer ring cross-sectional diameter of the easy-to-cut piece body is equal to the bottom end cross-sectional diameter of the air-permeable riser sleeve body, and the middle cross-sectional diameter of the inner wall of the upper bevel is larger than the middle cross-sectional diameter of the lower bevel.

[0009] Further preferably, the upper end surface of the annular support surface is fixed to the middle of the bottom end surface of the breathable riser sleeve body, and the bottom end surface of the annular support surface is fixed to the middle of the upper end surface of the easy-to-cut piece body, and the inner ring cross-sectional diameter of the annular support surface is equal to the upper side cross-sectional diameter of the upper slope.

[0010] Further preferably, the bottom end surface of the exhaust pipe is fixed to the middle part of the upper end surface of the breathable riser sleeve body, and the bottom end cross-sectional diameter of the outer side surface of the exhaust pipe is smaller than the upper end surface diameter of the breathable riser sleeve body, and the outer surfaces of the exhaust pipe, the breathable riser sleeve body and the easy-to-cut sheet body are all covered with the plastic film.

[0011] Further preferably, the plastic film is an EVA casting film, and the plastic film is tightly attached to the surfaces of the exhaust pipe, the breathable riser sleeve body and the easy-to-cut sheet body by vacuum adsorption, and a sealed cavity structure is formed between the exhaust pipe, the breathable riser sleeve body and the easy-to-cut sheet body and the plastic film.

[0012] Further preferably, the upper end of the bottom sealing adhesive sheet is in close contact with the bottom surface of the plastic film located at the bottom end of the easy-to-cut sheet body, and the bottom sealing adhesive sheet is a double-sided adhesive structure, and the bottom surface of the bottom sealing adhesive sheet is provided with an adhesive structure.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In the utility model, an easy-to-cut sheet main body and a bottom sealing adhesive sheet are provided, and the bottom sealing adhesive sheet is used to seal the easy-to-cut sheet main body and the plastic film. After the riser is placed, the bottom sealing adhesive sheet at the bottom of the easy-to-cut sheet main body is bonded to the plastic film, and the side of the easy-to-cut sheet main body does not need to be glued with tape, so the platform under the riser can be omitted or the riser positioning can be lowered, saving the grinding cost.

[0015] In the utility model, a plastic film and a bottom sealing adhesive sheet are provided. By covering the plastic film with the outer surfaces of the exhaust pipe, the air-permeable riser sleeve body and the easy-to-cut sheet body, and by vacuum adsorption, a closed cavity structure is formed between the exhaust pipe, the air-permeable riser sleeve body and the easy-to-cut sheet body and the plastic film. Then, by bonding with the bottom sealing adhesive sheet, the process of employees bonding tape for sealing is saved, thereby reducing labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the overall front section enlarged structure of the utility model.

[0019] In the figure: 1. exhaust pipe; 2. air-permeable riser sleeve body; 3. easy-to-cut sheet body; 4. connecting ring; 5. plastic film; 6. V-shaped protrusion; 7. annular supporting surface; 8. upslope; 9. downslope; 10. bottom sealing adhesive sheet. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technical personnel in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figures 1 to 3 The utility model provides a technical solution: a riser sleeve combined structure for V-method casting, comprising an exhaust pipe 1, a connecting ring 4 is arranged on the bottom end surface of the exhaust pipe 1, and a breathable riser sleeve body 2 is arranged at the bottom end of the connecting ring 4, an easy-to-cut sheet body 3 is arranged at the bottom end of the breathable riser sleeve body 2, and a bottom sealing adhesive sheet 10 is arranged at the bottom end of the easy-to-cut sheet body 3;

[0022] The outer surfaces of the exhaust pipe 1, the air-permeable riser sleeve body 2 and the easy-to-cut sheet body 3 are all provided with a plastic film 5, and a V-shaped protrusion 6 is provided in the middle of the upper end of the inner wall of the air-permeable riser sleeve body 2, an upward slope 8 is provided above the middle of the easy-to-cut sheet body 3, and a downward slope 9 is provided at the lower end of the upward slope 8, and an annular supporting surface 7 is provided on the upper side of the upper end surface of the upward slope 8.

[0023] In this embodiment, Figure 3 As shown, the breathable riser sleeve body 2 includes a riser sleeve body and a V-shaped protrusion 6, and the upper end surface of the V-shaped protrusion 6 is fixed to the middle surface of the upper end of the inner wall of the breathable riser sleeve body 2, and the material of the breathable riser sleeve body 2 is a material with excellent air permeability; by replacing the breathable riser sleeve body 2 with a heating riser with good air permeability, the process yield can be improved.

[0024] In this embodiment, Figure 3As shown, the easy-to-cut piece body 3 includes an easy-to-cut piece, an upper bevel 8 and a lower bevel 9, and the outer ring cross-sectional diameter of the easy-to-cut piece body 3 is equal to the bottom end cross-sectional diameter of the air-permeable riser sleeve body 2, and the middle cross-sectional diameter of the inner wall of the upper bevel 8 is larger than the middle cross-sectional diameter of the lower bevel 9; the upper bevel 8 and the lower bevel 9 are opened in the middle of the easy-to-cut piece body 3 to assist in completing the casting work.

[0025] In this embodiment, Figure 3 As shown, the upper end surface of the annular support surface 7 is fixed to the middle of the bottom end surface of the breathable riser sleeve body 2, and the bottom end surface of the annular support surface 7 is fixed to the middle of the upper end surface of the easy-to-cut sheet body 3, and the inner circle cross-sectional diameter of the annular support surface 7 is equal to the upper side cross-sectional diameter of the upper slope 8; by providing an annular support surface 7 at the bottom end of the breathable riser sleeve body 2, it is convenient for the user to better fix and connect the breathable riser sleeve body 2 and the easy-to-cut sheet body 3.

[0026] In this embodiment, Figure 2 As shown, the bottom end surface of the exhaust pipe 1 is fixed to the middle part of the upper end surface of the air-permeable riser sleeve body 2, and the bottom end cross-sectional diameter of the outer surface of the exhaust pipe 1 is smaller than the upper end surface diameter of the air-permeable riser sleeve body 2, and the outer surfaces of the exhaust pipe 1, the air-permeable riser sleeve body 2 and the easy-to-cut sheet body 3 are all covered with a plastic film 5; by arranging the exhaust pipe 1 at the upper end of the air-permeable riser sleeve body 2, a cavity can be formed inside the exhaust pipe 1 to directly contact the atmosphere.

[0027] In this embodiment, Figure 3 As shown, the plastic film 5 is an EVA casting film, and the plastic film 5 is tightly attached to the surfaces of the exhaust pipe 1, the air-permeable riser sleeve body 2 and the easy-to-cut sheet body 3 by a vacuum adsorption method, and a sealed cavity structure is formed between the exhaust pipe 1, the air-permeable riser sleeve body 2 and the easy-to-cut sheet body 3 and the plastic film 5; a sealed cavity structure can be formed between the exhaust pipe 1, the air-permeable riser sleeve body 2 and the easy-to-cut sheet body 3 and the plastic film 5 by vacuum suction.

[0028] In this embodiment, Figure 3 As shown, the upper end of the bottom sealing adhesive sheet 10 is tightly attached to the bottom surface of the plastic film 5 located at the bottom end of the easy-to-cut sheet body 3, and the bottom sealing adhesive sheet 10 is a double-sided adhesive structure, and the bottom surface of the bottom sealing adhesive sheet 10 is provided with an adhesive structure; by bonding the bottom sealing adhesive sheet 10 to the bottom surface of the plastic film 5 at the bottom end of the easy-to-cut sheet body 3, the subsequent positioning and fixing of the riser can be facilitated.

[0029] The use method and advantages of the utility model: The riser sleeve combined structure for V-method casting has the following working process when in use:

[0030] like Figure 1 , Figure 2 and Figure 3 As shown, firstly, the EVA casting film is coated on the surface of the exhaust pipe 1, the air-permeable riser sleeve body 2 and the easy-to-cut sheet body 3, and then the EVA casting film is closely attached to the surface of the exhaust pipe 1, the air-permeable riser sleeve body 2 and the easy-to-cut sheet body 3 by vacuum adsorption, and then one side of the bonding structure of the bottom sealing bonding sheet 10 at the bottom of the easy-to-cut sheet body 3 is peeled off, and the sheet is placed at a required position, and the upper surface of the bonding structure of the bottom sealing bonding sheet 10 is bonded to the EVA casting film at the bottom end of the easy-to-cut sheet body 3, so as to form a sealing structure, and then sand is added to the sand mold, vibrated, and filled, and then the plastic film 5 of the part higher than the exhaust pipe 1 is folded flat and attached to the sand surface, and at the same time, the plastic film 5 is covered on the surface of the sand box as a back film, and then the vacuum state of the mold is released, and the sand box is vacuumed at the same time, and then the plastic film 5 at the corresponding position on the upper part of the exhaust pipe 1 is cut off, and at this time, the riser is completely in contact with the atmosphere through the cavity formed by the exhaust pipe 1;

[0031] When assembling the exhaust pipe 1 and the air-permeable riser sleeve main body 2, the two components can be connected by the connecting ring 4. At the same time, when installing the air-permeable riser sleeve main body 2 and the easy-to-cut sheet main body 3, they can be connected by the annular supporting surface 7. Under vacuum suction, the outside atmosphere enters the riser through the cavity formed by the exhaust pipe 1 and the air-permeable riser sleeve main body 2, igniting the heat-generating material of the riser, thereby realizing the normal function of the riser in V-shaped casting, and the V-shaped protrusion 6, the upslope 8 and the downslope 9 are provided to assist in completing the casting process.

[0032] The above shows and describes the basic principle, main features and advantages of the utility model. Technical staff in this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A riser sleeve assembly structure for V-method casting, comprising an exhaust pipe (1), characterized in that: The bottom surface of the exhaust pipe (1) is provided with a connecting ring (4), and the bottom end of the connecting ring (4) is provided with a ventilating riser sleeve body (2), the bottom end of the ventilating riser sleeve body (2) is provided with an easy-to-cut sheet body (3), and the bottom end of the easy-to-cut sheet body (3) is provided with a bottom sealing adhesive sheet (10); The outer surfaces of the exhaust pipe (1), the air-permeable riser sleeve body (2) and the easy-to-cut sheet body (3) are all provided with plastic films (5), and a V-shaped protrusion (6) is provided at the middle of the upper end of the inner wall of the air-permeable riser sleeve body (2), an upper bevel (8) is provided above the middle of the easy-to-cut sheet body (3), and a lower bevel (9) is provided at the lower end of the upper bevel (8), and an annular support surface (7) is provided on the upper side of the upper end surface of the upper bevel (8).

2. The riser sleeve assembly structure for V-method casting according to claim 1, characterized in that: The air-permeable riser sleeve body (2) comprises a riser sleeve body and the V-shaped protrusion (6), and the upper end surface of the V-shaped protrusion (6) is fixed to the middle surface of the upper end of the inner wall of the air-permeable riser sleeve body (2), and the material of the air-permeable riser sleeve body (2) is a material with excellent air permeability.

3. The riser sleeve assembly structure for V-method casting according to claim 1, characterized in that: The easy-to-cut piece body (3) comprises an easy-to-cut piece, the upper bevel (8) and the lower bevel (9), and the outer ring cross-sectional diameter of the easy-to-cut piece body (3) is equal to the bottom end cross-sectional diameter of the air-permeable riser sleeve body (2), and the middle cross-sectional diameter of the inner wall of the upper bevel (8) is greater than the middle cross-sectional diameter of the lower bevel (9).

4. The riser sleeve assembly structure for V-method casting according to claim 1, characterized in that: The upper end surface of the annular support surface (7) is fixed to the middle of the bottom end surface of the air-permeable riser sleeve body (2), and the bottom end surface of the annular support surface (7) is fixed to the middle of the upper end surface of the easy-to-cut piece body (3), and the inner ring cross-sectional diameter of the annular support surface (7) is equal to the upper side cross-sectional diameter of the upper bevel (8).

5. The riser sleeve assembly structure for V-method casting according to claim 1, characterized in that: The bottom end surface of the exhaust pipe (1) is fixed to the middle of the upper end surface of the air-permeable riser sleeve body (2), and the bottom end cross-sectional diameter of the outer surface of the exhaust pipe (1) is smaller than the diameter of the upper end surface of the air-permeable riser sleeve body (2), and the outer surfaces of the exhaust pipe (1), the air-permeable riser sleeve body (2) and the easy-to-cut sheet body (3) are all covered with the plastic film (5).

6. The riser sleeve assembly structure for V-method casting according to claim 1, characterized in that: The plastic film (5) is an EVA casting film, and the plastic film (5) is closely attached to the surfaces of the exhaust pipe (1), the air-permeable riser sleeve body (2) and the easy-to-cut sheet body (3) by a vacuum adsorption method, and a sealed cavity structure is formed between the exhaust pipe (1), the air-permeable riser sleeve body (2) and the easy-to-cut sheet body (3) and the plastic film (5).

7. The riser sleeve assembly structure for V-method casting according to claim 1, characterized in that: The upper end of the bottom sealing adhesive sheet (10) is in close contact with the bottom surface of the plastic film (5) located at the bottom end of the easy-to-cut sheet body (3), and the bottom sealing adhesive sheet (10) is a double-sided adhesive structure, and the bottom surface of the bottom sealing adhesive sheet (10) is provided with an adhesive structure.

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