A casting mold for a shaft end with a boss

Abstract

A kind of shaft end casting with boss pouring mold, including cold type, core, core body fixing frame, core body inner sleeve and outer end cover, cold type both ends install outer end cover, core body fixing frame outer end is installed on outer end cover by rolling body, core body fixing frame outer end is equipped with pouring gate, and pouring gate is communicated with the pouring inlet of core body fixing frame, the inner end of core body fixing frame is fixedly connected with the core body inner sleeve in cold type, and the outer side of core body inner sleeve is equipped with core, and outer end cover, cold type and core form pouring cavity body between.The shaft end casting with boss pouring mold of the present application realizes one-time injection molding, product internal organization is uniform, eliminates the poor bonding condition of boss, reduces manufacturing cost;Centrifugal pouring, organization is fine, can improve product surface wear resistance, corrosion resistance, the performance index such as impact toughness, pressure resistance of product is greatly enhanced.

Description

Technical Field

[0001] This invention relates to the field of casting technology. Background Technology

[0002] like Figure 1 The end-mounted casting 1 shown, such as a drying or bushing, is generally cast using a static casting method. However, in recent years, based on user performance requirements, a two-stage centrifugal casting method has also been adopted. The casting mold is as follows... Figures 2-4 As shown, a certain amount of molten iron is poured into the mold through the pouring ports 5 and pouring inlets 6 on the inner end caps 3 on both sides. The cylindrical sleeve 4 of the casting is formed by the first centrifugal pouring. The boss 2 of the casting is formed by the second pouring of a certain amount of molten iron. The second pouring needs to be carried out simultaneously from both ends, requiring strict control of parameters such as molten iron temperature, time, and the bonding temperature between the two layers. The work is very complicated. If any part of the work is not done properly or well controlled, it will cause problems such as poor bonding and internal defects, resulting in a high scrap rate. During the second pouring of the boss, because the inner end caps 3 and the jig rotate together, the molten iron is blocked by the fixing ribs 7 of the inner end caps, causing splashing, which poses a safety hazard. Summary of the Invention

[0003] In order to solve the above-mentioned problems of existing casting molds with bosses at the ends, the present invention provides a casting mold with bosses at the shaft ends.

[0004] The technical solution adopted by the present invention to achieve the above objectives is as follows: a casting mold with a boss at the shaft end, comprising a cold mold 8, a core 10, a core fixing frame 19, a core inner sleeve 14, and an outer end cover 23. The outer end cover 23 is installed at both ends of the cold mold 8. The outer end of the core fixing frame 19 is installed on the outer end cover 23 through a rolling element 20. The outer end of the core fixing frame 19 is provided with a pouring port 30. The rotating body pouring port 30 is connected to the pouring inlet 17 of the core fixing frame 19. The inner end of the core fixing frame 19 is fixedly connected to the core inner sleeve 14 located inside the cold mold 8. The core 10 is provided on the outer side of the core inner sleeve 14. The outer end cover 23, the cold mold 8, and the core 10 together form a pouring cavity 31.

[0005] The core 10 is made of refractory material. The core 10 and the inner sleeve 14 are fixedly connected by an annular nut 11 and a fixing bolt 15. The core 10 is provided with an axial reinforcing rib 12.

[0006] The contact surfaces at the ends of the core fixing frame 19 and the inner sleeve 14 of the core are both conical structures, and the core fixing frame 19 and the inner sleeve 14 of the core are connected by fixing bolts 15.

[0007] The two ends of the cold type 8 and the outer end cover 23 are connected by fixing pins 24.

[0008] The rotating body dustproof ring 22 is installed between the pouring cavity 31 and the rolling body 20 outside the core fixing frame 19.

[0009] The inner cavity of the core fixing frame 19 is provided with a refractory material layer 21, and the core sand baffle 16 is installed on the rotating body pouring inlet 17.

[0010] The inner side of the outer end cover 23 is provided with a refractory material layer 21.

[0011] The core inner sleeve 14 is provided with a longitudinal sand vent hole 13.

[0012] The outer end cover 23 is provided with a transverse heat dissipation hole 18 which is communicated with the pouring cavity.

[0013] The cold type is provided with a cold type rotating positioning table 9 outside.

[0014] The shaft end boss casting pouring mold of the application realizes one-time pouring forming, the internal organization of the product is uniform, the boss combination is eliminated, the manufacturing cost is reduced, the centrifugal pouring is realized, the organization is fine, the product surface wear resistance, corrosion resistance, impact toughness, pressure resistance and other performance indicators are greatly enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is the main view of the castings processed by the application.

[0016] Figure 2 is the main view of the existing shaft end boss casting pouring mold.

[0017] Figure 3 is the main view of the inner end cover of the existing shaft end boss casting pouring mold.

[0018] Figure 4 is Figure 3 A-A sectional view.

[0019] Figure 5 is the main view of the shaft end boss casting pouring mold of the application.

[0020] Figure 6 is the existing shaft end boss casting pouring mold core side view of the application.

[0021] Figure 7 is the assembly schematic view of the existing shaft end boss casting pouring mold.

[0022] In the figure: 1, casting, 2, boss, 3, inner end cover, 4, cylindrical sleeve, 5, pouring gate, 6, pouring inlet, 7, fixing rib, 8, cold mold, 9, cold mold rotating positioning table, 10, mold core, 11, annular nut, 12, axial reinforcing rib, 13, sand vent, 14, core inner sleeve, 15, fixing bolt, 16, sand core baffle, 17, rotating body pouring inlet, 18, heat dissipation port, 19, core fixing frame, 20, rolling body, 21, refractory material layer, 22, rotating body dust retaining ring, 23, outer end cover, 24, fixing pin, 25, supporting wheel, 26, supporting wheel fixing frame, 27, motor shaft, 28, supporting wheel shaft, 29, coupling, 30, pouring gate, 31, pouring cavity. DETAILED DESCRIPTION

[0023] The shaft end boss casting pouring mold structure of the present application is shown in Figure 5 The core is composed of a rigid cylindrical core inner sleeve 14, a refractory material layer 21, a core fixing frame 19, a rolling body 20 (a rotatable bearing), an annular nut 11 with a slight degree, a fixing bolt 15, and the like, and forms an independent rotating body. The core fixing frame 19 is positioned with the rigid core inner sleeve 14 by a taper surface and is fastened by a bolt. The outer side of the rigid core inner sleeve 14 is a shaped refractory material core 10. The refractory material core 10 contains a plurality of annular nuts 11 with a slight degree and reinforcing ribs as rigidity enhancers to prevent the refractory material from falling off. The two end core fixing frames 19 are supported and positioned by the rolling body 20 at the outer end cover. The specific structure is as follows:

[0024] The cold type 8 is fixedly installed through the fixing pin 24 at both ends, the outer end cover 23 is internally provided with a refractory material layer 21, and the outer end cover 23 is provided with a transverse heat dissipation opening 18 which is communicated with the pouring cavity. The core fixing frame 19 is installed on the outer end cover 23 through the rolling body 20, the outer end of the core fixing frame 19 is provided with a pouring opening 30, the pouring opening 30 is communicated with the pouring inlet 17 of the core fixing frame 19, the outer end of the core fixing frame 19 is provided with a rotating body dustproof ring 22 to prevent molten iron from entering the rotating body, the inner cavity is filled with a refractory material layer to ensure that the molten iron is smooth and unobstructed. The contact surfaces of the core fixing frame 19 and the end of the core inner sleeve 14 are all conical surface structures, the core fixing frame 19 and the core inner sleeve 14 are connected through the fixing bolt 15, the outer side of the core inner sleeve 14 is provided with a core 10 which is made of refractory material, the core 10 and the core inner sleeve 14 are fixedly connected through the annular nut 11 and the fixing bolt 15, and the pouring size of the core can be changed by adjusting the shape and height of the annular nut 11 to adapt to products of different sizes. The inner part of the core 10 is provided with an axial reinforcing rib 12, and the circumference of the core inner sleeve 14 is provided with a plurality of groups of longitudinal sand vent holes 13 to facilitate the discharge of the gas in the inner part of the casting 1 during pouring. The pouring cavity 31 is formed between the outer end cover 23, the cold type 8 and the core 10, the rotating body dustproof ring 22 is installed between the outer side of the core fixing frame 19 and the rolling body 20, the inner cavity of the core fixing frame 19 is provided with a refractory material layer 21, and the core sand baffle 16 is installed on the pouring inlet 17 of the rotating body.

[0025] As shown in Figure 6 use, the cold type rotating positioning table 9 at the outer side of the cold type 8 is connected with the supporting wheel 25, the supporting wheel shaft 28 is installed on the supporting wheel fixing frame 26 and is connected with the motor shaft 27 through the shaft coupling 29, the supporting wheel 25 is rotated by the motor to drive the mold cold type 8 to rotate. Before pouring the molten iron, the cold type 8 and the core are differentially rotated through the rolling body 20, when the molten iron fills the gap between the cold type and the refractory material core 10, the core and the cold type are synchronously rotated to prevent the sand dropping caused by friction from affecting the product quality. A certain amount of molten iron is poured to make the casting be formed at one time.

[0026] The present application is described by way of examples, and those skilled in the art will appreciate that various modifications or equivalent replacements can be made to these features and examples without departing from the spirit and scope of the present application. In addition, these features and examples can be modified to adapt to specific conditions and materials under the guidance of the present application without departing from the spirit and scope of the present application. Therefore, the present application is not limited to the specific examples disclosed herein, and all examples falling within the scope of the claims of the present application belong to the protection scope of the present application.

Claims

1. A casting mold with a boss at the shaft end, characterized in that: The mold includes a cold mold (8), a core (10), a core inner sleeve (14), and an outer end cap (23). The outer end cap (23) is installed at both ends of the cold mold (8). The outer end of the core fixing frame (19) is installed on the outer end cap (23) via a rolling element (20). The outer end of the core fixing frame (19) is provided with a pouring port (30), which is connected to the pouring inlet (17) of the core fixing frame (19). The inner end of the core fixing frame (19) is fixedly connected to the core inner sleeve (14) located inside the cold mold (8). The inner sleeve (14) is provided with a core (10) on the outside. The outer end cover (23), the cold mold (8) and the core (10) form a casting cavity (31). The cold mold rotating positioning table on the outside of the cold mold is connected to the support roller. The support roller shaft is installed on the support roller fixing frame and connected to the motor shaft through the coupling. The motor drives the support roller to rotate, thereby driving the mold cold mold to rotate. Before pouring molten iron, the cold mold and the core form a differential rotation through the rolling body. When the molten iron fills the gap between the cold mold and the refractory core, the core and the cold mold achieve synchronous rotation.

2. The casting mold with a boss at the shaft end according to claim 1, characterized in that: The core (10) is made of refractory material. The core (10) and the inner sleeve (14) are fixedly connected by a ring nut (11) and a fixing bolt (15). The core (10) is provided with an axial reinforcing rib (12).

3. A casting mold with a boss at the shaft end according to claim 1, characterized in that: The contact surfaces at the ends of the core fixing frame (19) and the core inner sleeve (14) are both conical structures, and the core fixing frame (19) and the core inner sleeve (14) are connected by fixing bolts (15).

4. A casting mold with a boss at the shaft end according to claim 1, characterized in that: The two ends of the cold type (8) and the outer end cap (23) are connected by a fixing pin (24).

5. A casting mold with a boss at the shaft end according to claim 1, characterized in that: A rotating dust baffle (22) is installed on the outside of the core fixing frame (19) between the casting cavity (31) and the rolling element (20).

6. A casting mold with a boss at the shaft end according to claim 1, characterized in that: The inner cavity of the core fixing frame (19) is provided with a refractory material layer (21), and a core sand baffle (16) is installed on the casting inlet (17).

7. A casting mold with a boss at the shaft end according to claim 1, characterized in that: The outer end cap (23) has a refractory material layer (21) on its inner side.

8. A casting mold with a boss at the shaft end according to claim 1, characterized in that: The inner sleeve (14) of the core is provided with longitudinal molding sand vents (13).

9. A casting mold with a boss at the shaft end according to claim 1, characterized in that: The outer end cap (23) is provided with a transverse heat dissipation port (18) that communicates with the casting cavity.

10. A casting mold with a boss at the shaft end according to claim 1, characterized in that: The outer side of the cold-type is provided with a cold-type rotating positioning platform (9).

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