CN221966730U - A core pulling mechanism for hot core box mold - Google Patents

Abstract

The utility model provides a hot core box mould mechanism of loosing core, includes the frame, the vertical lead screw elevating system that is equipped with in base central authorities of frame, the top of frame has horizontal mesa, horizontal mesa's central authorities have the round hole, lead screw elevating system's top is fixed with the mount pad, vertical cartridge has the axis of rotation in the mount pad, the axis of rotation upper end is fixed with the dish of loosing core, and the dish of loosing core with the round hole is concentric, through lead screw elevating system drives the dish of loosing core and reciprocates in the round hole. The core pulling disc can freely rotate to realize spiral integral core pulling during demolding, complete integral demolding, solve the problem of difficult demolding of integral molding of the sand core, continuously operate, improve the production efficiency of the sand core, and ensure the consistency of the size of the sand core.

Description

A core pulling mechanism for hot core box mold

Technical Field

The utility model relates to the technical field of hot core box moulds, in particular to a core pulling mechanism of a hot core box mould.

Background Art

Rotor aluminum alloy castings containing multiple sets of flat blades with negative demolding slopes have high requirements for the size, slope and relative position of each set of blades to ensure that the dynamic balance test is qualified. This requires the casting molding sand core to have a stable structure and consistent size. It is difficult to demold the sand core when it is formed as a whole. In the prior art, the production of the sand core adopts split core making. Although split core making can solve the problem of core demolding, there are problems such as large positioning error of manual core assembly, low production efficiency, and high labor intensity, which ultimately lead to problems such as long product production cycle, poor consistency of product blade size, and unstable dynamic balance quality.

Utility Model Content

The utility model provides a hot core box mold core pulling mechanism to overcome the shortcomings of the prior art.

The technical solution adopted by the utility model is: a hot core box mold core pulling mechanism, comprising a frame, a screw lifting mechanism is vertically provided in the center of the base of the frame, the top of the frame has a horizontal platform, the center of the horizontal platform has a circular hole, the top of the screw lifting mechanism is fixed with a mounting seat, a rotating shaft is vertically inserted in the mounting seat, a core pulling disk is fixed to the upper end of the rotating shaft, and the core pulling disk is concentric with the circular hole, and the core pulling disk is driven to move up and down in the circular hole by the screw lifting mechanism.

The upper end of the rotating shaft is connected to a fixed core-pulling disc via a flange.

A guide rod is vertically arranged on the frame, a guide plate is horizontally fixed on the mounting seat, and the guide plate is sleeved on the guide rod.

Positioning keys are arranged on the horizontal surface, and the positioning keys are arranged outside the circular hole.

The horizontal surface is evenly distributed with threaded holes, and the threaded holes are located outside the circular hole.

The screw lifting mechanism is a turbine screw lifting mechanism.

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

1. During demoulding, the core-pulling disc of the utility model can rotate freely to realize spiral integral core pulling and complete the overall demoulding, thus solving the problem of difficulty in demoulding the overall sand core. The utility model can operate continuously, improve the production efficiency of the sand core, and ensure the consistency of the sand core size.

2. The core-pulling disc of the utility model is easy to replace and can be applied to the integral core-making and demoulding of flat blade casting products of different rotor types.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a schematic diagram of the structure of the utility model;

Figure 2 is a schematic cross-sectional view of the structure of the utility model;

Fig. 3 is a schematic diagram of the overall sand core structure;

FIG. 4 is an exploded schematic diagram of a hot box mold.

DETAILED DESCRIPTION

The utility model is described in detail below in conjunction with Figures 1-4 and specific implementation methods.

A hot core box mold core pulling mechanism comprises a frame 1, a screw lifting mechanism 2 is vertically provided at the bottom center of the frame 1, the top of the frame 1 has a horizontal surface 3, the center of the horizontal surface 3 has a circular hole 3-1, a mounting seat 4 is fixed to the top of the screw lifting mechanism 2, a rotating shaft 5 is vertically inserted in the mounting seat 4, a core pulling disk 6 is fixed to the upper end of the rotating shaft 5, and the core pulling disk 6 is concentric with the circular hole 3-1, and the core pulling disk 6 is driven by the screw lifting mechanism 2 to move up and down in the circular hole 3-1.

In order to facilitate the replacement of the core pulling plate 6 to adapt to the core pulling of different types of hot core box molds, the upper end of the rotating shaft 5 is connected to the fixed core pulling plate 6 through a flange plate 10.

In order to ensure that the core-pulling plate 6 moves up and down smoothly, a guide rod 8 is vertically arranged on the frame 1 , and a guide plate 7 is horizontally fixed on the mounting seat 4 , and the guide plate 7 is sleeved on the guide rod 8 .

In order to ensure that the lower mold 13 of the hot core box mold is accurately fixed on the horizontal surface 3. The horizontal surface 3 is provided with positioning keys 9, and the positioning keys 9 are arranged in a cross shape around the circular hole 3-1. The horizontal surface 3 is evenly distributed with threaded holes 3-2, and the threaded holes 3-2 are located around the circular hole 3-1.

The screw lifting mechanism 2 is preferably a worm screw lifting mechanism, and is driven by a motor 11 .

The method of use is as follows: fix the utility model on the equipment for making sand cores, embed the mold core 14 on the upper end surface of the core pulling disk 6, and then fix the core pulling disk 6 on the flange 10, start the motor 11 to drive the core pulling disk 6 to rise to the set height in the circular hole 3-1 through the screw lifting mechanism 2, and then fit the lower mold 13 of the hot core box mold with the core pulling disk 6 to form a lower mold cavity, and at the same time, the positioning groove and the positioning key 9 of the lower mold 13 are fastened and positioned quickly, and the lower mold 13 is fixedly connected to the horizontal platform surface 3 by bolts passing through the lower mold 13 from top to bottom and connected with the threaded hole 3-2, and then the upper mold 12 of the hot core box mold is buckled with the lower mold 13 and sand is injected. After the sand core is made, move the upper mold 12 upward, start the electric motor 11 to drive the core pulling disk 6 to move downward through the screw lifting mechanism 2, and at the same time, the core pulling disk 6 can rotate freely around the rotating shaft 5 to complete the spiral integral core pulling, and finally the formed integral sand core 15 can be taken out. The motor 11 is started again to drive the core-pulling disc 6 to rise to the set height in the circular hole 3-1, and the next cycle is entered to make the next sand core. The continuous operation improves the production efficiency of the sand core and ensures the consistency of the sand core size.

The utility model is particularly suitable for core making and demoulding of rotor aluminum alloy casting products containing multiple groups of flat blades with negative demoulding slopes, and can also be suitable for integral core making and demoulding of flat blade casting products of different rotors by replacing the core pulling disk.

The above embodiments are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, all equivalent changes made to the contents described in the claims of the present invention should be included in the scope of the claims of the present invention.

Claims (6)

1. A core pulling mechanism of a hot core box die is characterized in that: including frame (1), the vertical lead screw elevating system (2) that is equipped with in base center of frame (1), the top of frame (1) has horizontal mesa (3), the center of horizontal mesa (3) has round hole (3-1), the top of lead screw elevating system (2) is fixed with mount pad (4), vertical cartridge has axis of rotation (5) in mount pad (4), axis of rotation (5) upper end is fixed with core pulling disc (6), and core pulling disc (6) with round hole (3-1) are concentric, through lead screw elevating system (2) drive core pulling disc (6) reciprocate in round hole (3-1).

2. The hot box mold core pulling mechanism according to claim 1, wherein: the upper end of the rotating shaft (5) is connected with and fixed with the core pulling disc (6) through a flange disc (10).

3. The hot box mold core pulling mechanism according to claim 1 or 2, characterized in that: the guide rod (8) is vertically arranged on the frame (1), the guide plate (7) is horizontally fixed on the mounting seat (4), and the guide plate (7) is sleeved on the guide rod (8).

4. A hot box mold core pulling mechanism according to claim 3, wherein: the horizontal table top (3) is provided with a positioning key (9), and the positioning key (9) is arranged on the periphery of the round hole (3-1).

5. The hot box mold core pulling mechanism according to claim 4, wherein: threaded holes (3-2) are uniformly distributed on the horizontal table top (3), and the threaded holes (3-2) are positioned at the periphery of the round hole (3-1).

6. The hot box mold core pulling mechanism according to claim 5, wherein: the screw lifting mechanism (2) is a worm gear screw lifting mechanism.