Investment casting structure of supporting and fixing seat

Abstract

The utility model discloses a supporting and fixing seat investment casting structure. The supporting and fixing seat investment casting structure comprises a tree assembling die head and a plurality of supporting and fixing seat investment casting parts communicated with the tree assembling die head, the tree assembling die head comprises a cup pouring gate, an I-shaped pouring gate, a plurality of wax discharging channels, a plurality of wedge-shaped inner pouring gates with slopes and two communicating pouring gates arranged on the I-shaped pouring gate. The cup pouring gate is communicated with the top of the I-shaped pouring gate; one end of each wax discharging channel is communicated with the cup pouring gate, and the other end of each wax discharging channel is communicated with a supporting and fixing seat investment casting part; one end of each wedge-shaped flow gate is communicated with the I-shaped pouring gate, and the other end of each wedge-shaped flow gate is communicated with the supporting and fixing seat investment casting part. Molten steel flow injection is stable, and air holes and slag holes are not prone to being generated in a casting. Dewaxing is thorough, and cost and environmental protection are facilitated; and castings are high in yield and stable and reliable in quality.

Description

Technical Field

[0001] The utility model relates to the technical field of investment casting, in particular to an investment casting structure of a supporting fixed seat. Background Art

[0002] The support and fixing seat is the main accessory of medical equipment produced by famous domestic medical equipment manufacturers. The weight of the blank is 1.81KG, and it is a stainless steel accessory with structural functions. The surface of the part is required to be polished, the geometric shape is accurate, and the material is cast 304 stainless steel. There is no casting defect visually. This requires that the casting process must be perfect, the heat section of the casting must be fully compensated, and there is no casting defect.

[0003] In traditional investment casting technology, in order to manufacture a support fixture with complex geometry and high precision requirements, it is necessary to make a wax model, make a shell, dewax, bake and pour. However, the existing technology has some limitations, such as:

[0004] 1. The pouring system design is not optimized enough, resulting in uneven flow of molten metal, which is prone to casting defects such as pores, slag holes and shrinkage.

[0005] 2. The design of the wax drain channel is unreasonable, which cannot ensure that the investment wax is completely removed, affecting the molding quality of the casting.

[0006] 3. The process yield is low and the cost is high, which is not conducive to large-scale production and market competition. Utility Model Content

[0007] In view of the problems existing in the prior art, the utility model provides a support fixing seat investment casting structure.

[0008] In order to achieve the above purpose, the technical solution of the utility model is as follows:

[0009] The utility model provides a support fixing seat investment casting structure, comprising: a tree assembly die head, a plurality of support fixing seat investment casting parts connected with the tree assembly die head;

[0010] The tree die head comprises a cup gate, an I-shaped runner, a plurality of wax discharge channels, a plurality of wedge-shaped inner gates with an inclination, and two conducting runners arranged on the I-shaped runner;

[0011] The cup gate is connected to the top of the I-shaped runner; one end of each of the wax discharge channels is connected to the cup gate, and the other end is connected to a supporting fixed seat investment casting;

[0012] One end of each wedge-shaped ingates is communicated with the I-shaped runner, and the other end is communicated with the investment casting of the supporting fixing seat.

[0013] Preferably, the I-shaped runner includes an upper runner, a lower runner, and a vertical runner connected to the upper runner and the lower runner; and the cup gate is connected to the upper runner.

[0014] Preferably, one end of each of the conducting runners is connected to one end of the upper runner, and the other end is connected to one end of the corresponding lower runner.

[0015] Preferably, the number of the plurality of wedge-shaped ingates is set to 8, and one side end of each of the upper runner and the lower runner is connected to two wedge-shaped ingates.

[0016] Preferably, each of the support fixing seat investment castings is connected through two wedge-shaped ingates.

[0017] Preferably, each of the support fixing seat investment castings is communicated with a wedge-shaped ingate provided on the upper runner and a wedge-shaped ingate provided on the lower runner.

[0018] Preferably, the number of the plurality of wax drainage channels and the plurality of support fixing seat investment castings is set to 4.

[0019] Preferably, the diameter of each of the wax drainage channels is 6 mm.

[0020] The technical solution of the utility model has the following beneficial effects:

[0021] The utility model optimizes the pouring system: by designing an inclined wedge-shaped ingate and an I-shaped runner, uniform flow and filling of the molten metal are achieved, and casting defects are effectively reduced. The inclined design of the wedge-shaped ingate helps to compensate for the shrinkage of the molten metal at the main hot node, reduces defects at the hot node, and improves the overall quality of the casting.

[0022] The utility model improves the process yield rate: through the design of the group tree die head, the casting of a group of 4 pieces is realized, which significantly improves the process yield rate and reduces the unit cost.

[0023] The optimized design of the wax discharge channel of the utility model ensures the complete discharge of the investment wax, avoids the air holes and slag holes in the casting, and is also beneficial to environmental protection and cost control.

[0024] The castings of the utility model have a high production rate, which meets the needs of mass production and enhances the market competitiveness of the products. The castings produced by this solution have stable and reliable quality, fully meet the requirements of customer drawings, and meet the medical device industry's needs for high precision and high quality standards for accessories. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of the utility model Figure 1 ;

[0026] Figure 2 This is a schematic diagram of the structure of the utility model Figure 2 ;

[0027] Figure 3 This is a schematic diagram of the structure of the utility model Figure 3 ;

[0028] Figure 4 This is a schematic diagram of the structure of the utility model Figure 4 . DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0031] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Reference Figures 1 to 4 The utility model provides a support fixing seat investment casting structure, comprising: a tree assembly die head, a plurality of support fixing seat investment casting parts 6 connected to the tree assembly die head;

[0035] The die head comprises a cup gate 1, an I-shaped runner 2, a plurality of wax discharge channels 4, a plurality of wedge-shaped inner gates 3 with an inclination, and two conducting runners 5 arranged on the I-shaped runner 2;

[0036] The cup gate 1 is connected to the top of the I-shaped runner 2; one end of each of the wax discharge channels 4 is connected to the cup gate 1, and the other end is connected to a supporting fixed seat investment casting 6; the wax discharge channel 4 adopts a wax discharge channel 4 with a diameter of 6mm to ensure that the investment wax can be completely discharged, avoiding defects such as air holes and slag holes in the casting, and is beneficial to cost control and environmental protection.

[0037] One end of each of the wedge-shaped ingates 3 is connected to the I-shaped runner 2, and the other end is connected to the support fixed seat investment casting 6, wherein the wedge-shaped ingates 3 are designed at the main thermal node and have an inclination to ensure the molding and shrinkage compensation of the casting and reduce defects at the thermal node.

[0038] Furthermore, the I-shaped runner 2 includes an upper runner 201 and a lower runner 202, and a vertical runner 203 connected to the upper runner 201 and the lower runner 202. The I-shaped design helps to evenly distribute the molten metal to each wedge-shaped inner gate 3; the cup gate 1 is connected to the upper runner 201 and is placed in the middle of the upper runner 201. The cup gate is placed in the middle of the upper runner 201, which helps to achieve even distribution of the metal injection liquid and can reduce turbulence and oxidation during the flow process, thereby improving the quality of the casting and reducing casting defects.

[0039] Furthermore, one end of each of the conducting runners 5 is connected to one end of the upper runner 201, and the other end is connected to one end of the corresponding lower runner 202, which is conducive to the flow and distribution of the metal injection liquid in the runner system; the number of the multiple wedge-shaped ingates 3 is set to 8, and one side end of the upper runner 201 and the lower runner 202 are connected to two wedge-shaped ingates 3. Each of the supporting fixed seat investment castings 6 is connected through two wedge-shaped ingates 3; each of the supporting fixed seat investment castings 6 is connected to the wedge-shaped ingates 3 set on the upper runner 201 and the wedge-shaped ingates 3 set on the lower runner 202. The number of the multiple wax discharge channels 4 and the multiple supporting fixed seat investment castings 6 is set to 4, and 4 supporting fixed seat investment castings 6 can be produced each time, with high production efficiency.

[0040] The investment casting process scheme of the utility model is carefully designed for the production of the support fixing seat to ensure the high quality and high yield of the casting. Firstly, according to the structural characteristics of the casting, two inclined wedge-shaped gates 3 are set at the main hot node. Such a design helps the molten metal to fill the cavity more smoothly during injection and realizes effective shrinkage compensation in the hot node area, thereby reducing casting defects.

[0041] Furthermore, we adopted a tree module grouping method, each group containing 4 support fixing seat investment castings 6. Such batch processing greatly improved the production efficiency. In order to ensure the complete removal of the investment wax, we welded a wax drainage channel 4 with a diameter of 6mm at each product wax mold. This measure helps to avoid the formation of pores and slag holes in the casting, thereby ensuring the surface quality of the casting and the integrity of the internal structure.

[0042] After the shell is dewaxed and baked, we use a special cooling method: after taking the mold head out of the baking furnace, we quickly immerse the lower part of the mold head in water for 1 to 2 seconds. This step helps to adjust the temperature of the shell and prepare for the subsequent molten metal injection. After that, we pull the shell module directly to the furnace mouth for molten steel pouring. After the pouring is completed, the shell module is placed on a sand tray for cooling to achieve uniform solidification of the casting.

[0043] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the utility model concept, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A support fixed seat investment casting structure, characterized in that: include: A tree assembly die head and a plurality of support fixing seat investment casting parts connected to the tree assembly die head; The mold head comprises a cup gate, an I-shaped runner, a plurality of wax discharge channels, a plurality of wedge-shaped inner gates with an inclination, and two conducting runners arranged on the I-shaped runner; The cup gate is connected to the top of the I-shaped runner; one end of each of the wax discharge channels is connected to the cup gate, and the other end is connected to a supporting fixed seat investment casting; One end of each wedge-shaped ingates is communicated with the I-shaped runner, and the other end is communicated with the investment casting of the supporting fixing seat.

2. The support and fixing seat investment casting structure according to claim 1 is characterized in that: The I-shaped runner includes an upper runner, a lower runner, and a vertical runner connected to the upper runner and the lower runner; the cup gate is connected to the upper runner.

3. The investment casting structure of the support fixing seat according to claim 2 is characterized in that: One end of each of the conducting runners is connected to one end of the upper runner, and the other end is connected to one end of the corresponding lower runner.

4. The investment casting structure of the support fixing seat according to claim 3 is characterized in that: The number of the plurality of wedge-shaped ingates is set to 8, and one side end of each of the upper runner and the lower runner is connected to two wedge-shaped ingates.

5. The investment casting structure of the support fixing seat according to claim 4 is characterized in that: Each of the support fixing seat investment castings is connected through two wedge-shaped ingates.

6. The investment casting structure of the support fixing seat according to claim 5, characterized in that: Each of the support fixing seat investment castings is communicated with a wedge-shaped ingate arranged on the upper runner and a wedge-shaped ingate arranged on the lower runner.

7. The support and fixing seat investment casting structure according to claim 6, characterized in that: The number of the plurality of wax discharge channels and the plurality of support fixing seat investment casting parts is set to 4.

8. The support and fixing seat investment casting structure according to claim 7, characterized in that: The diameter of each wax discharge channel is 6 mm.

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