Plane ejection mechanism of automatic mold for precision casting

Abstract

The utility model relates to the field of precision casting automatic molds, and discloses a plane ejection mechanism of an automatic mold for precision casting, which comprises an upper fixing plate, a positioning pin is slidably connected in the upper fixing plate, the outer wall of the positioning pin is slidably connected with an upper mold plate, the lower surface of the upper fixing plate is arranged on the upper surface of the upper mold plate, and the lower surface of the upper fixing plate is arranged on the lower surface of the upper mold plate. The outer wall of the upper mold plate is in threaded connection with a lower mold plate, the upper surface of the lower mold plate is arranged on the lower surface of the upper fixing plate, and one end of the positioning pin is arranged above the lower mold plate. In the utility model, the plane ejector is arranged at the top end of the circular ejector rod to form a plane ejector mechanism, so that the problems that dents appear when the ejector rod ejects a wax type product and the circular ejector rod is easy to damage are solved, the requirement of one-time forming of the wax type product with less repair or without repair can be met, the casting precision of the product is improved, and the working efficiency is improved; the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automatic precision casting moulds, in particular to a plane ejection mechanism of an automatic precision casting mould. Background Art

[0002] Precision casting is a manufacturing process that precisely pours molten metal or alloy into a pre-prepared shell and solidifies it into a part or workpiece of the desired shape. It has the following characteristics: high precision, good surface quality, high dimensional accuracy, good internal quality, and high production efficiency. Wax molds are required in the production process of precision casting shells, and high-precision precision casting molds will be used in the production process of wax molds.

[0003] The process flow of precision casting technology is mainly divided into two parts: mold making and casting. The first is mold making. Mold making is the key to the entire process. Molds are generally made of materials with high temperature resistance and low thermal expansion coefficient, such as aluminum alloy, plastic mold steel, carbide mold steel, high-speed steel mold material, stainless steel mold material, etc. Casting mold refers to the mold used to form castings in the casting forming process. Casting molds are supporting casting processes, mainly gravity casting molds, high-pressure casting molds, low-pressure casting molds, extrusion casting molds, etc. Casting molds are one of the most important process equipment in casting production and have a great impact on the quality of castings. The improvement of casting mold technology will be of great significance to improving the quality of castings, developing new castings, and improving the level of near-net processing. Make the shape and size of the product in the mold, and add automatic modules and temperature control devices. The production of molds requires high precision to ensure the accuracy and surface quality of the product. Improvements in mold structure and design can ensure product diversity, improve efficiency in the production process, and reduce the use of corresponding auxiliary tools and materials.

[0004] For molds with complex product structures, a certain depth, and a large production quantity, automatic molds with ejectors are usually used.

[0005] In traditional casting processes, cylindrical ejector mechanism molds are usually used. Many wax products with depth cannot guarantee that they will not be concave during ejection. At the same time, the cylindrical ejector mechanism is easy to wear and cannot meet the production needs of products with ejection, which reduces the complexity of product production, reduces work efficiency, and increases costs. Utility Model Content

[0006] In order to make up for the above shortcomings, the utility model provides a plane ejection mechanism of an automatic mold for precision casting, which aims to improve the dent problem that occurs when the ejector pin ejects the wax-type product.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a planar ejection mechanism of an automatic mold for precision casting, comprising an upper fixed plate, the interior of the upper fixed plate is slidably connected with a positioning pin, the outer wall of the positioning pin is slidably connected with the mold upper plate, the lower surface of the upper fixed plate is arranged on the upper surface of the mold upper plate, the outer wall of the mold upper plate is threadedly connected with the mold lower plate, the upper surface of the mold lower plate is arranged on the lower surface of the upper fixed plate, one end of the positioning pin is arranged above the mold lower plate, the outer wall of the mold lower plate is threadedly connected with a mold foot, the upper surface of the mold foot is arranged below the upper fixed plate, the upper surface of the mold foot is arranged below the mold upper plate, the upper surface of the mold foot is arranged below the positioning pin, the outer wall of the mold foot is threadedly connected with the lower fixed plate, the upper surface of the lower fixed plate is arranged below the mold lower plate, and the outer wall of the mold lower plate is provided with an ejection assembly.

[0008] Furthermore, the ejection assembly comprises an ejection plate, an outer wall of the ejection plate is slidably connected to the inside of the lower plate of the mold, and the outer wall of the ejection plate is slidably connected to a guide column.

[0009] Furthermore, an ejector rod is fixedly connected to the upper surface of the ejector plate, and an outer wall of the ejector rod is slidably connected to the inside of the lower plate of the mold.

[0010] Furthermore, a lower fixing plate is fixedly connected to the lower end of the guide column, and an upper surface of the lower fixing plate is arranged on a lower surface of the ejection plate.

[0011] Furthermore, the outer wall of the guide post is slidably connected to the inside of the upper plate of the mold, and the outer wall of the guide post is slidably connected to the inside of the lower plate of the mold.

[0012] Furthermore, a planar ejection is fixedly connected to the top end of the ejector rod, and an upper surface of the planar ejection is arranged below the upper fixed plate.

[0013] Furthermore, the inner thread of the upper plate of the mold is connected with an anti-shrinkage column, the outer wall of the anti-shrinkage column is arranged on the outer wall of the upper fixed plate and is threadedly connected with a handle, and the outer wall of the handle is arranged on the outer wall of the upper fixed plate.

[0014] The utility model has the following beneficial effects:

[0015] 1. In the utility model, a flat ejector is installed on the top of a circular ejector rod to form a flat ejector mechanism, which solves the problem of dents when the ejector rod ejects the wax-type product and the problem that the circular ejector rod is easily damaged. The requirement of one-time forming with little or no repair of the wax-type product can be met, and the casting accuracy of the product is improved, the work efficiency is improved, and the cost is reduced.

[0016] 2. In the present invention, the guide anti-deviating function is realized by adding a guide column, thereby achieving the beneficial effect of guidance, which can improve the casting accuracy of the product, improve the product yield, and extend the service life of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a plane ejection mechanism of an automatic mold for precision casting proposed by the utility model;

[0018] Figure 2 It is a partial structural schematic diagram of one side of the ejector plate of a plane ejector mechanism of an automatic mold for precision casting proposed by the utility model;

[0019] Figure 3 The utility model is a partial structural schematic diagram of a plane ejection side of a plane ejection mechanism of an automatic mold for precision casting.

[0020] Legend:

[0021] 1. Upper fixed plate; 2. Upper plate of mold; 3. Lower plate of mold; 4. Mold foot; 5. Lower fixed plate; 6. Handle; 7. Ejector rod; 8. Guide column; 9. Ejector plate; 10. Anti-shrinkage column; 11. Plane ejector; 12. Positioning pin. DETAILED DESCRIPTION

[0022] 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 technicians in this field without creative work are within the scope of protection of the utility model.

[0023] Reference Figure 1 - Figure 3 The utility model provides an embodiment: a plane ejection mechanism of an automatic mold for precision casting, comprising an upper fixed plate 1, the interior of the upper fixed plate 1 is slidably connected with a positioning pin 12, the outer wall of the positioning pin 12 is slidably connected with a mold upper plate 2, the lower surface of the upper fixed plate 1 is arranged on the upper surface of the mold upper plate 2, the outer wall of the mold upper plate 2 is threadedly connected with a mold lower plate 3, the upper surface of the mold lower plate 3 is arranged on the lower surface of the upper fixed plate 1, one end of the positioning pin 12 is arranged above the mold lower plate 3, the outer wall of the mold lower plate 3 is threadedly connected with a mold foot 4, the upper surface of the mold foot 4 is arranged below the upper fixed plate 1, the upper surface of the mold foot 4 is arranged below the mold upper plate 2, the upper surface of the mold foot 4 is arranged below the positioning pin 12, the outer wall of the mold foot 4 is threadedly connected with a lower fixed plate 5, the upper surface of the lower fixed plate 5 is arranged below the mold lower plate 3, and the outer wall of the mold lower plate 3 is provided with an ejection assembly.

[0024] Specifically, during the casting process, the mold upper plate 2 and the mold lower plate 3 are tightly closed by threaded connection to form a cavity. The molten metal is injected into the cavity, and after cooling and solidification, a casting is formed. The upper fixed plate 1 is slidably connected to the mold upper plate 2 through the positioning pin 12 to ensure the correct position of the mold upper plate 2 during the ejection process. The contact surface between the upper fixed plate 1 and the mold upper plate 2 helps to disperse the ejection force and reduce the wear of the mold. When the casting solidifies, the casting needs to be removed from the mold. At this time, the ejection assembly is activated.

[0025] Reference Figure 1 - Figure 3 The ejection assembly includes an ejection plate 9, the outer wall of the ejection plate 9 is slidably connected to the inside of the mold lower plate 3, the outer wall of the ejection plate 9 is slidably connected to the guide column 8, the upper surface of the ejection plate 9 is fixedly connected to the ejector rod 7, the outer wall of the ejector rod 7 is slidably connected to the inside of the mold lower plate 3, the lower end of the guide column 8 is fixedly connected to the lower fixed plate 5, the upper surface of the lower fixed plate 5 is arranged on the lower surface of the ejection plate 9, the outer wall of the guide column 8 is slidably connected to the inside of the mold upper plate 2, the outer wall of the guide column 8 is slidably connected to the inside of the mold lower plate 3, the top of the ejector rod 7 is fixedly connected to the plane ejection 11, the upper surface of the plane ejection 11 is arranged below the upper fixed plate 1, the inner part of the mold upper plate 2 is threadedly connected with the anti-shrinkage column 10, the outer wall of the anti-shrinkage column 10 is arranged below the upper fixed plate 1, the outer wall of the mold upper plate 2 is threadedly connected to the handle 6, and the outer wall of the handle 6 is arranged on the outer wall of the upper fixed plate 1.

[0026] Specifically, at the same time or after the ejection assembly is activated, the mold upper plate 2 and the mold lower plate 3 are separated by threaded connection to form an open state. At this time, the guide column 8 is slidably connected inside the mold upper plate 2 and the mold lower plate 3 to ensure the stability of the ejection process. The ejection plate 9 is slidably connected inside the mold lower plate 3 and transmits the force to the plane ejector 11 through the ejector rod 7. After the casting is completely ejected, the ejector rod 7 is reset, and the mold upper plate 2 and the mold lower plate 3 are closed again by threaded connection, ready for the next round of casting.

[0027] Working principle: When it is necessary to use a flat ejection mechanism for an automatic mold for precision casting, first adjust the wax injection port position and fix the fixed upper fixing plate 1 on the upper pressure plate of the wax injection machine with screws, and fix the lower fixing plate 5 on the lower pressure plate of the wax injection machine with screws. The wax injection work starts when the mold is fully closed. After the wax pattern is injected into the mold cavity, operate the pneumatic valve button to control the movement of the cylinder to complete the movement of the upper fixing plate 1 along with the upper plate of the wax injection machine. After the mold is opened, the wax pattern is taken out to complete the wax injection operation.

[0028] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A planar ejection mechanism for an automatic mold for precision casting, comprising an upper fixing plate (1), characterized in that: The interior of the upper fixed plate (1) is slidably connected with a positioning pin (12), and the outer wall of the positioning pin (12) is slidably connected with the mold upper plate (2). The lower surface of the upper fixed plate (1) is arranged on the upper surface of the mold upper plate (2), and the outer wall of the mold upper plate (2) is threadedly connected with the mold lower plate (3), and the upper surface of the mold lower plate (3) is arranged on the lower surface of the upper fixed plate (1). One end of the positioning pin (12) is arranged above the mold lower plate (3), and the outer wall of the mold lower plate (3) is threadedly connected with a mold foot (4), and the upper surface of the mold foot (4) is arranged below the upper fixed plate (1), and the upper surface of the mold foot (4) is arranged below the mold upper plate (2), and the upper surface of the mold foot (4) is arranged below the positioning pin (12). The outer wall of the mold foot (4) is threadedly connected with a lower fixed plate (5), and the upper surface of the lower fixed plate (5) is arranged below the mold lower plate (3). The outer wall of the mold lower plate (3) is provided with an ejection assembly.

2. The plane ejection mechanism of an automatic mold for precision casting according to claim 1, characterized in that: The ejection assembly comprises an ejection plate (9), the outer wall of which is slidably connected to the inside of the mold lower plate (3), and the outer wall of which is slidably connected to a guide column (8).

3. The plane ejection mechanism of an automatic mold for precision casting according to claim 2, characterized in that: The upper surface of the ejection plate (9) is fixedly connected to a push rod (7), and the outer wall of the push rod (7) is slidably connected to the inside of the mold lower plate (3).

4. The plane ejection mechanism of an automatic mold for precision casting according to claim 2, characterized in that: The lower end of the guide column (8) is fixedly connected to a lower fixing plate (5), and the upper surface of the lower fixing plate (5) is arranged on the lower surface of the ejection plate (9).

5. The plane ejection mechanism of an automatic mold for precision casting according to claim 4, characterized in that: The outer wall of the guide column (8) is slidably connected to the inside of the mold upper plate (2), and the outer wall of the guide column (8) is slidably connected to the inside of the mold lower plate (3).

6. The plane ejection mechanism of an automatic mold for precision casting according to claim 3, characterized in that: The top end of the ejector rod (7) is fixedly connected to a planar ejector (11), and the upper surface of the planar ejector (11) is arranged below the upper fixed plate (1).

7. The plane ejection mechanism of an automatic mold for precision casting according to claim 5, characterized in that: The internal thread of the mold upper plate (2) is connected to an anti-shrinkage column (10), and the outer wall of the anti-shrinkage column (10) is arranged below the upper fixed plate (1).

8. The plane ejection mechanism of an automatic mold for precision casting according to claim 7, characterized in that: The outer wall of the mold upper plate (2) is threadedly connected with a handle (6), and the outer wall of the handle (6) is arranged on the outer wall of the upper fixed plate (1).

Images