Automatic structure of three-layer extrusion loose piece for precision casting

Abstract

The utility model relates to the field of precision casting automatic dies, and discloses an automatic structure of a three-layer extrusion loose piece for precision casting, which comprises an upper fixing plate and a lower fixing plate, the upper fixing plate and the lower fixing plate fix a wax injection port through bolts, the top of the lower fixing plate is fixedly connected with an ejector plate and a die foot through bolts, and the ejector plate is fixedly connected with the die foot through bolts. The ejector plate is connected to the lower fixing plate through a shaft fixed to the lower fixing plate and moves up and down, the top of the mold foot is fixedly connected with a lower mold plate through a bolt, the interior of the lower mold plate is fixedly connected with a mold core lower plate through a bolt, and positioning pins are arranged at the four corners of the lower mold plate. According to the utility model, the three layers of extrusion movable design with the dovetail grooves are connected in a sinking and inclined manner to form a mold inner core, so that the problem that the one-time forming of a tip reversing structure of a complex product cannot be completed is solved, the requirement of one-time forming of a complex part can be met, the product casting precision is improved, the working efficiency is improved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of automatic molds for precision casting, in particular to an automatic structure of a three-layer extrusion movable block for precision casting. Background Art

[0002] Precision casting is a manufacturing process in which molten metal or alloy is precisely poured into a pre-prepared mold shell and solidified into a part or workpiece of the required shape. It has the following characteristics: high precision, good surface quality, high dimensional accuracy, good internal quality, high production efficiency, etc. In the process of making the precision casting mold shell, wax molds are required, and high-precision precision casting molds will be used in the wax mold making process.

[0003] The technological process of precision casting technology is mainly divided into two parts: mold making and casting. First is mold making. The making of the mold is the key to the whole technological process. The mold is generally made of materials with high temperature resistance and low thermal expansion coefficient, such as aluminum alloy, plastic mold steel, cemented carbide mold steel, high-speed steel mold material, stainless steel mold material, etc. A casting mold refers to the mold used to form castings in the casting forming process. Casting molds are supporting the casting process, mainly including gravity casting molds, high-pressure casting molds, low-pressure casting molds, squeeze 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 for improving the quality of castings, developing new castings, and improving the near-net shaping level. The shape and size of the product are made in the mold, and an automatic module and a temperature control device are added. The making of the mold requires high precision to ensure the precision and surface quality of the product. The improvement of the mold structure and design can ensure the diversity of the product, the improvement of production efficiency during the production process, and the reduction of the use of corresponding auxiliary tools and materials. For molds with complex product structures and large production quantities, automatic molds with movable blocks are usually used.

[0004] In the traditional casting process, the mold is usually made by using multiple manual movable blocks, or there is only one dovetail groove on the movable block, which cannot meet the mold for products with undercuts, and at the same time, core pulling cannot be performed under normal structures, which cannot meet the production needs of complex products, that is, it reduces the complexity of the produced products, reduces work efficiency, and increases costs. Summary of the Utility Model

[0005] In order to make up for the above deficiencies, the utility model provides an automatic structure of a three-layer extrusion movable block for precision casting, aiming to improve the problems that core pulling cannot be performed for undercuts and cannot meet the production needs of complex products, thereby reducing work efficiency and increasing costs.

[0006] To achieve the above object, the present utility model provides the following technical solution: An automatic structure of a three-layer extrusion movable block for precision casting, including an upper fixing plate and a lower fixing plate. The upper fixing plate and the lower fixing plate are fixed with a wax injection port by bolts. The top of the lower fixing plate is fixedly connected with an ejector plate and a die foot by bolts. The ejector plate is connected to the lower fixing plate through a shaft fixed on the lower fixing plate and moves up and down on the lower fixing plate. The top of the die foot is fixedly connected with a lower template by bolts. The inside of the lower template is fixedly connected with a lower die insert plate by bolts. Positioning pins are arranged at four corners of the lower template. The positioning pins are fixed on the upper template through the upper fixing plate. The lower part of the upper fixing plate is connected to the lower template through positioning pins. The upper template is fixedly connected with an upper die insert plate by bolts. An extrusion movable block system cylinder is arranged on the side wall of the upper template. The extrusion movable block system cylinder is fixed on the upper template by bolts. An extrusion movable block cylinder is arranged on one side of the lower template. An extrusion type movable block is arranged on the side wall of the extrusion movable block cylinder. The extrusion type movable block is composed of three movable blocks with dovetail groove structures. The extrusion type movable block is fixed on the extrusion movable block cylinder by screws.

[0007] Further, a cylinder movable block is arranged on the upper surface of the lower template. The cylinder movable block is fixed on the lower template by bolts.

[0008] Further, a movable block type cylinder is arranged on the side wall of the lower template. The movable block type cylinder is fixed on the lower template by bolts.

[0009] Further, a self-returning movable block is arranged on the upper surface of the lower template. The self-returning movable block is fixed on the upper template and the lower template by bolts.

[0010] The present utility model has the following beneficial effects:

[0011] 1. In the present utility model, through the design of three layers of extrusion movable blocks with dovetail grooves, they are inclined and connected inside the sink to form a mold core, solving the problem that the undercut structure of complex products cannot be formed in one time, and eliminating the possibility of using manual movable blocks. It can meet the requirements of one-time forming of complex parts, improve the casting accuracy of products, improve work efficiency, and reduce costs.

[0012] 2. In the present utility model, by achieving the requirement of one-time forming of complex parts, waste and loss in the production process can be reduced, the product quality can be effectively improved, work efficiency can be improved, costs can be reduced, and the influence of human factors on the production process can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a top view of an automatic structure of a three-layer extrusion movable block for precision casting proposed by the present utility model;

[0014] Figure 2A three - layer extrusion movable block automatic structure for precision casting proposed by the present utility model;

[0015] Figure 3 A schematic diagram of the sectional structure of the three - layer extrusion movable block in a three - layer extrusion movable block automatic structure for precision casting proposed by the present utility model;

[0016] Figure 4 A schematic diagram of the lower movable plate in a three - layer extrusion movable block automatic structure for precision casting proposed by the present utility model.

[0017] Legend description:

[0018] 1. Upper fixing plate; 2. Extrusion movable block system cylinder; 3. Extrusion movable block cylinder; 4. Movable block type cylinder; 5. Upper template; 6. Wax injection port; 7. Lower template; 8. Mold feet; 9. Lower fixing plate; 10. Positioning pin; 11. Upper plate of the mold core; 12. Lower plate of the mold core; 13. Extrusion movable block; 14. Ejector plate; 15. Cylinder movable block; 16. Self - rebounding movable block. Specific implementation manners

[0019] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0020] Refer to Figure 1 - Figure 4 In an embodiment provided by the present utility model: A three - layer extrusion movable block automatic structure for precision casting includes an upper fixing plate 1 and a lower fixing plate 9. The upper fixing plate 1 and the lower fixing plate 9 are bolt - fixed to the wax injection port 6;

[0021] Specifically, after adjusting the position of the wax injection port 6, the fixed upper fixing plate 1 is fixed to the upper pressure plate of the wax injection machine by screw fixation, and the lower fixing plate 9 is fixed to the lower pressure plate of the wax injection machine by screw fixation.

[0022] Refer to Figure 1 - Figure 4, the top of the lower fixed plate 9 is fixedly connected with an ejector plate 14 and a die foot 8 by bolts. The ejector plate 14 is connected to the lower fixed plate 9 through a shaft fixed on the lower fixed plate 9 and moves up and down on the lower fixed plate 9. The top of the die foot 8 is fixedly connected with a lower template 7 by bolts. The inside of the lower template 7 is fixedly connected with a lower die insert plate 12 by bolts. Positioning pins 10 are arranged at the four corners of the lower template 7. The positioning pins 10 are fixed on the upper template 5 through the upper fixed plate 1. The lower part of the upper fixed plate 1 is connected to the lower template 7 through the positioning pins 10. The upper die insert plate 11 is fixedly connected to the upper template 5 by bolts. An extrusion slide block system cylinder 2 is arranged on the side wall of the upper template 5. The extrusion slide block system cylinder 2 is fixed on the upper template 5 by bolts. An extrusion slide block cylinder 3 is arranged on one side of the lower template 7. An extrusion type slide block 13 is arranged on the side wall of the extrusion slide block cylinder 3. The extrusion type slide block 13 is composed of three slide blocks with dovetail groove structures. The extrusion type slide block 13 is fixed on the extrusion slide block cylinder 3 by screws. A cylinder slide block 15 is arranged on the upper surface of the lower template 7. The cylinder slide block 15 is fixed on the lower template 7 by bolts. A slide block type cylinder 4 is arranged on the side wall of the lower template 7. The slide block type cylinder 4 is fixed on the lower template 7 by bolts. A self-returning slide block 16 is arranged on the upper surface of the lower template 7. The self-returning slide block 16 is fixed on the upper template 5 and the lower template 7 by bolts;

[0023] Specifically, the lower fixed plate 9 provides the installation position and the position for installing on the lower pressing plate of the wax injection machine. The die foot 8 can support the mold. The lower template 7 and the upper template 5 can drive the lower die insert plate 12 and the upper die insert plate 11 to move. The positioning pins 10 can enable the mold to be accurately spliced without deviation. The lower die insert plate 12 and the upper die insert plate 11 can press out the shape of the product. The dovetail groove extrusion type slide block 13 driven by the extrusion slide block cylinder 3 completes the core pulling in the form of an inclined pin. The cylinder slide block 15 fixed on the lower template 7 drives the cylinder slide block 15 to move. The self-returning slide block 16 completes the self-core pulling under the action of the spring when the upper template 5 moves upward, thus forming a mold inner core. Through holes are arranged at the four corners of the lower template 7 and the upper template 5. The positioning pins 10 are slidably connected inside the through holes. Among them, the four extrusion slide block system cylinders 2 move left and right to make the extrusion type slide blocks 13 contact the lower die insert plate 12. Among them, the four extrusion type slide blocks 13 are respectively slidably connected to the lower die insert plate 12 under the left and right movement of the extrusion slide block cylinders 3. The lower die insert plate 12 and the upper die insert plate 11 are in contact. The upper template 5 contacts the lower template 7 under the action of the upper fixed plate 1 fixed on the upper plate of the wax injection machine. Two holes are arranged inside the front and rear sides of the upper fixed plate 1. Two round holes are arranged inside the front and rear sides of the lower fixed plate 9. The through holes can cooperate with the positioning pins 10, so as to position the inner upper die insert plate 11 and the lower die insert plate 12. The holes can enable the upper fixed plate 1 to contact the upper pressing plate of the wax injection machine through bolts, and at the same time, the lower fixed plate 9 and the lower pressing plate of the wax injection machine can be connected through the round holes by bolts.

[0024] Working principle: After adjusting the position of the wax injection port 6, the fixed upper fixing plate 1 is fixed on the upper pressing plate of the wax injection machine by means of screws, and the lower fixing plate 9 is fixed on the lower pressing plate of the wax injection machine by means of screws. The wax injection work starts in the fully closed state of the mold. After the wax pattern is injected into the mold cavity, the pneumatic valve button is operated to control the movement of the cylinder. Due to the adjustment of the air intake of the cylinder, the extrusion block cylinder 3 moves fast, and the extrusion block system cylinder 2 moves slowly. First, the four extrusion block cylinders 3 move to pull out the four extrusion blocks 13 with dovetail grooves outward. Subsequently, the four extrusion block system cylinders 2 drive the four extrusion block cylinders 3 to move. After the four block cylinders 4 move, the product will almost complete the core pulling. Then, the start button of the upper pressing plate of the wax injection machine is operated. With the upward movement of the upper pressing plate, it drives the upper fixing plate 1, the upper template 5, the upper plate of the mold core 11, the self-returning block 16 and the positioning pin 10 to move together. After the inner core unit of the mold composed of the extrusion block 13, the extrusion block cylinder 3 and the extrusion block system cylinder 2 completes the movement steps in an orderly manner, the wax injection process is completed. Subsequently, the wax mold is taken out to complete the wax injection operation.

[0025] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An automatic structure of a three-layer extrusion block for precision casting, comprising an upper fixing plate (1) and a lower fixing plate (9), characterized in that: The upper fixing plate (1) and the lower fixing plate (9) are fixed to the wax injection port (6) by bolts. The top of the lower fixing plate (9) is fixedly connected to the ejector plate (14) and the mold foot (8) by bolts. The ejector plate (14) is connected to the lower fixing plate (9) by a shaft fixed to the lower fixing plate (9) so as to move up and down. The top of the mold foot (8) is fixedly connected to the lower mold plate (7) by bolts. The interior of the lower mold plate (7) is fixedly connected to the mold core lower plate (12) by bolts. Positioning pins (10) are arranged at four corners of the lower mold plate (7). The positioning pins (10) are fixed to the upper mold plate (5) through the upper fixing plate (1). The lower part of the upper fixed plate (1) is connected to the lower template (7) via a positioning pin (10); the upper template (5) is fixedly connected to the mold core upper plate (11) via bolts; the side wall of the upper template (5) is provided with an extrusion block system cylinder (2); the extrusion block system cylinder (2) is fixed to the upper template (5) via bolts; one side of the lower template (7) is provided with an extrusion block cylinder (3); the side wall of the extrusion block cylinder (3) is provided with an extrusion type block (13); the extrusion type block (13) is composed of three blocks with dovetail groove structures; the extrusion type block (13) is fixed to the extrusion block cylinder (3) via screws.

2. The automatic structure of a three-layer extrusion live block for precision casting according to claim 1 is characterized in that: A cylinder block (15) is provided on the upper surface of the lower template (7), and the cylinder block (15) is fixed to the lower template (7) by bolts.

3. The automatic structure of a three-layer extrusion live block for precision casting according to claim 1 is characterized in that: A movable block cylinder (4) is provided on the side wall of the lower template (7), and the movable block cylinder (4) is fixed to the lower template (7) by bolts.

4. The automatic structure of a three-layer extrusion live block for precision casting according to claim 1 is characterized in that: A self-rebounding movable block (16) is arranged on the upper surface of the lower template (7), and the self-rebounding movable block (16) is fixed to the upper template (5) and the lower template (7) by means of bolts.

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