A middle-low pressure forming die for a draft tube

Abstract

The utility model provides a low pressure forming die of flow guide pipe relates to metal atomization powder making technical field. Including base, the top of base is inserted with forming insert piece, the top around forming insert piece is provided with male die lining, is provided with fixed outer sleeve on the outside of male die lining and base, is embedded with top cover on fixed outer sleeve and male die lining, and forming insert piece, base, male die lining and top cover form the loading area. This forming die has reduced the production period of flow guide pipe, and the shortest 2 hours complete flow guide pipe finished product's processing, has reduced the production cost of flow guide pipe, and the production cost is not more than 10% of isostatic pressure forming process cost, has realized light weight, has reduced equipment investment cost with the middle pressure, low pressure forming process, and in the case of lacking the middle pressure, low pressure mechanical equipment, also can realize stable production with manual ramming, has high mobility and practicality, and the flow guide pipe finished product of batch production meets the production demand of metal atomization powder completely through production application.

Description

Technical Field

[0001] This utility model relates to the field of metal atomization powder production technology, and in particular to a medium and low pressure forming mold for a guide tube. Background Technology

[0002] Currently, in the metal atomization process, molten metal flows into the tundish and is constrained by the guide tube embedded below the tundish, forming a stable flow of molten metal. After entering the central hole of the atomizing disk below, it is continuously impacted and broken by high-pressure water or high-pressure gas, causing the resulting tiny droplets to fly and cool to form powder.

[0003] Current production of guide tubes employs isostatic pressing (OSP), a process where refractory material is filled into an elastic rubber or plastic mold, which is then placed in a container filled with liquid and molded using large pressurizing machinery that applies pressure uniformly ranging from tens to hundreds of megapascals. This existing OSP process, involving numerous production steps, results in excessively long production cycles for guide tubes of different specifications, typically exceeding 15 days. This fails to meet the urgent needs of metal atomization companies for specific guide tube specifications. Furthermore, the high equipment investment and limited production flexibility associated with OSP production lead to high prices for guide tubes on the market, increasing the overall production cost of metal atomization powder. Utility Model Content

[0004] This utility model provides a medium and low pressure forming mold for a guide tube. Existing technologies have problems such as excessively long production cycle, high equipment investment cost, limited production flexibility, and high production cost.

[0005] To solve the aforementioned problems of this utility model, the technical solution provided by this utility model is as follows:

[0006] A medium-low pressure forming mold for a guide tube includes a base, a forming insert inserted on the top of the base, a punch liner surrounding the forming insert on the top of the base, a fixing sleeve on the outside of the punch liner and the base, and a top cover embedded on the fixing sleeve and the punch liner. The forming insert, the base, the punch liner and the top cover form a feeding area.

[0007] Optionally, the base is provided with a base through hole, and the bottom of the molded insert is inserted into the base through hole.

[0008] Optionally, the fixed jacket includes a fixed jacket body, and two fixed jacket bodies are spliced ​​together along the central axis of the medium and low pressure forming mold to form the fixed jacket; the fixed jacket body is provided with a first hole, a second hole and a third hole that communicate with each other, and the punch liner includes an upper liner and a lower liner;

[0009] The lower part of the liner and the base are installed in the third hole, and the upper part of the liner is installed in the second hole.

[0010] Optionally, a second stepped surface is formed between the second hole and the third hole, and the top surface of the lower part of the punch liner rests on the second stepped surface.

[0011] Optionally, a first stepped surface is formed between the first hole and the second hole, and the top surface of the punch liner is flush with the first stepped surface.

[0012] Optionally, the top cover includes an upper part and a lower part, the upper part of the top cover is installed in the first hole, and the bottom surface of the upper part of the top cover is in contact with the second step surface and the top surface of the punch liner.

[0013] Optionally, the inner side of the punch liner is provided with a forming cavity, and the lower part of the top cover is inserted into the upper part of the forming cavity.

[0014] Optionally, the top cover is provided with a through hole, and the upper part of the molded insert is inserted into the through hole.

[0015] Optionally, the molded insert includes an upper positioning part, a molding part, and a lower positioning part; the upper positioning part and the lower positioning part of different models of molded inserts have the same size, while the size of the molding part is different.

[0016] The above technical solution has at least the following advantages compared with the existing technology:

[0017] The above solution, with its medium and low pressure forming mold for the guide tube, reduces the production cycle of the guide tube, completing the processing of the finished guide tube in as little as 2 hours; it also reduces the production cost of the guide tube, with the production cost not exceeding 10% of the cost of isostatic pressing; it achieves lightweighting, and the use of medium and low pressure forming processes reduces equipment investment costs. Even in the absence of medium and low pressure machinery, stable production can be achieved by manual tamping, which has high mobility and practicality. The mass-produced guide tubes fully meet the production needs of metal atomization powder. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a cross-sectional view of the molding die (for machining a cylindrical funnel-shaped guide tube) of this utility model;

[0020] Figure 2 for Figure 1 Top view;

[0021] Figure 3 A perspective view of a cylindrical funnel-shaped guide tube manufactured using the molding die of this utility model;

[0022] Figure 4 This is a cross-sectional view of the molding die (processing groove-shaped guide tube) of this utility model. Figure 1 ;

[0023] Figure 5 This is a cross-sectional view of the molding die (processing groove-shaped guide tube) of this utility model. Figure 2 ;

[0024] Figure 6 for Figure 5 Top view;

[0025] Figure 7 To produce a three-dimensional grooved guide tube using the molding die of this utility model Figure 1 ;

[0026] Figure 8 To produce a three-dimensional grooved guide tube using the molding die of this utility model Figure 2 .

[0027] The annotations in the attached figures are explained as follows:

[0028] 1. Fixed outer casing body; 11. First hole; 12. Second hole; 13. Third hole; 14. First step surface; 15. Second step surface; 2. Base; 21. Base through hole; 3. Punch liner; 31. Upper part of liner; 32. Lower part of liner; 33. Molding cavity; 4. Molding insert; 41. Upper positioning part; 42. Molding part; 43. Lower positioning part; 5. Top cover; 51. Upper part of top cover; 52. Lower part of top cover; 53. Through hole; 6. Guide tube. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the described embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0030] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an," "a," or "the" do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0031] It should be noted that the terms "upper", "lower", "left", "right", "front", and "back" used in this utility model are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0032] Example 1

[0033] like Figures 1-8 As shown, this embodiment provides a medium-low pressure forming mold for a guide tube, including a base 2, a forming insert 4, a punch liner 3, a fixing sleeve, and a top cover 5. The forming insert 4 is inserted into the top of the base 2, and the punch liner 3 is arranged around the forming insert 4 on the top of the base 2. The fixing sleeve is arranged on the outside of the punch liner 3 and the base 2, and the top cover 5 is embedded on the fixing sleeve and the punch liner 3. The forming insert 4, the base 2, the punch liner 3, and the top cover 5 form a feeding area.

[0034] Specifically, the base 2 has a base through hole 21, and the bottom of the molding insert 4 is inserted into the base through hole 21. The fixing sleeve includes a fixing sleeve body 1, and two fixing sleeve bodies 1 are spliced ​​along the central axis of the medium and low pressure molding die to form a fixing sleeve; the fixing sleeve body 1 has a first hole 11, a second hole 12 and a third hole 13 that are connected inside the fixing sleeve, a first step surface 14 is formed between the first hole 11 and the second hole 12, and a second step surface 15 is formed between the second hole 12 and the third hole 13. The punch liner 3 includes an upper liner 31 and a lower liner 32, and a molding cavity 33 is provided on the inner side of the punch liner 3. The top cover 5 includes an upper top cover 51 and a lower top cover 52, and a through hole 53 is provided on the top cover 5.

[0035] The lower part 32 of the inner liner and the base 2 are installed in the third hole 13, the upper part 31 of the inner liner is installed in the second hole 12, the top surface of the lower part 32 of the punch liner 3 abuts on the second step surface 15, the top surface of the punch liner 3 is flush with the first step surface 14, the upper part 51 of the top cover 5 is installed in the first hole 11, the bottom surface of the upper part 51 of the top cover 5 is in contact with the second step surface 15 and the top surface of the punch liner 3, the lower part 52 of the top cover 5 is inserted into the upper part of the forming cavity 33, and the upper part of the forming insert 4 is inserted into the through hole 53.

[0036] Specifically, the molded insert 4 includes an upper positioning part 41, a molding part 42, and a lower positioning part 43; the upper positioning part 41 and the lower positioning part 43 of different models of molded inserts 4 have the same size, while the size of the molding part 42 is different.

[0037] Example 2

[0038] like Figures 4-8 Based on Embodiment 1, the medium and low pressure forming mold of the guide tube provided in this embodiment has a rectangular cross-section and an inverted trapezoidal longitudinal section in the forming cavity 33 of the punch liner 3, and a rectangular cross-section and an inverted funnel-shaped longitudinal section in the forming part 42 of the forming insert 4. Using the forming mold of this embodiment, a groove-shaped guide tube 6 can be processed.

[0039] Example 3

[0040] like Figures 1-3 Based on Embodiment 1, the medium and low pressure forming mold of the guide tube provided in this embodiment has a circular cross-section and an inverted trapezoidal longitudinal section in the forming cavity 33 of the punch liner 3, and a circular cross-section and an inverted funnel-shaped longitudinal section in the forming part 42 of the forming insert 4. Using the forming mold of this embodiment, a cylindrical funnel-shaped guide tube 6 can be processed.

[0041] The medium- and low-pressure forming mold of the guide tube of this utility model reduces the production cycle of the guide tube 6, and the processing of the finished guide tube 6 can be completed in as little as 2 hours; it also reduces the production cost of the guide tube 6, with the production cost not exceeding 10% of the cost of isostatic pressing process; this utility model achieves lightweighting, reduces equipment investment costs by using medium- and low-pressure forming processes, and can achieve stable production by manual tamping even when medium- and low-pressure mechanical equipment is lacking, with high mobility and practicality. The mass-produced guide tube 6 fully meets the production needs of metal atomization powder after production application.

[0042] The working process of the medium and low pressure forming mold of the guide tube of this utility model is as follows:

[0043] According to the size of the outlet opening of the guide pipe 6, different models of molding inserts 4 are selected. The lower positioning part 43 of the molding insert 4 is inserted into the through hole 53 of the base 2. A punch liner 3 is placed around the molding insert 4 on the top surface of the base 2. The two fixed outer sleeves are fitted onto the punch liner 3 and the base 2.

[0044] Pour the mixture into the feeding area, compact and level it initially, insert the lower part 52 of the top cover 5 into the molding cavity 33, and use medium or low pressure machinery or manual tamping to press the bottom surface of the upper part 51 of the top cover 5 firmly against the first step surface 14 of the outer jacket and the top surface of the punch liner 3, and press the bottom surface of the lower part 52 of the top cover 5 firmly against the mixture until the workpiece (guide tube 6) is formed.

[0045] Open the mold fixing jacket, remove the mold top cover 5, separate the punch liner 3, remove the molding insert 44, and remove the molded guide tube 6.

[0046] After the pressed and shaped guide tube 6 is baked in an oven at 100℃ until all the moisture is evaporated, it is fired at 200-800℃ for 1-3 hours and then naturally cooled.

[0047] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. The protection scope of this utility model shall be determined by the protection scope of the claims.

Claims

1. A medium-to-low pressure forming mold for a guide tube, characterized in that, The device includes a base, a molded insert inserted on the top of the base, a punch liner surrounding the molded insert on the top of the base, a fixing sleeve on the outside of the punch liner and the base, and a top cover embedded on the fixing sleeve and the punch liner. The molded insert, the base, the punch liner and the top cover form a feeding area.

2. The medium-low pressure forming mold for the guide tube according to claim 1, characterized in that, The base has a base through hole, and the bottom of the molded insert is inserted into the base through hole.

3. The medium-low pressure forming mold for the guide tube according to claim 1, characterized in that, The fixed jacket includes a fixed jacket body, and two fixed jacket bodies are spliced ​​together along the central axis of the medium and low pressure forming mold to form the fixed jacket; the fixed jacket body is provided with a first hole, a second hole and a third hole that are connected; the punch liner includes an upper liner and a lower liner. The lower part of the liner and the base are installed in the third hole, and the upper part of the liner is installed in the second hole.

4. The medium-low pressure forming mold for the guide tube according to claim 3, characterized in that, A second stepped surface is formed between the second hole and the third hole, and the top surface of the lower part of the punch liner rests on the second stepped surface.

5. The medium-low pressure forming mold for the guide tube according to claim 3, characterized in that, A first stepped surface is formed between the first hole and the second hole, and the top surface of the punch liner is flush with the first stepped surface.

6. The medium-low pressure forming mold for the guide tube according to claim 4, characterized in that, The top cover includes an upper part and a lower part. The upper part of the top cover is installed in the first hole, and the bottom surface of the upper part of the top cover is in contact with the second step surface and the top surface of the punch liner.

7. The medium-low pressure forming mold for the guide tube according to claim 1, characterized in that, The inner side of the punch liner is provided with a forming cavity, and the lower part of the top cover is inserted into the upper part of the forming cavity.

8. The medium-low pressure forming mold for the guide tube according to claim 1, characterized in that, The top cover has a through hole, and the upper part of the molded insert is inserted into the through hole.

9. The medium-low pressure forming mold for the guide tube according to claim 1, characterized in that, The molded insert includes an upper positioning part, a molding part, and a lower positioning part; the upper and lower positioning parts of different models of molded inserts have the same dimensions, while the dimensions of the molding part are different.

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