TW452517B - Manufacturing process and apparatus for powder-formed product - Google Patents

Abstract

A cavity 16 is filled with powder material 17. The cavity 16 is composed of a die 12 and a lower punch 13. The die 12 has a die hole 11 shaped corresponding to outer shape of powder-formed product. The powder material is pre-pressed by an upper punch 14 and the lower punch 13 thereby forming a pre-product 18. A punch pin 15a is inserted to the pre-product 18 for punching a through hole 3. Then the pre-product 18 is further pressed by the upper punch 14 and the lower punch 13 thereby forming a powder-formed product 19. The punch pin 15a is pulled out of the powder-formed product 19, and the powder-formed product 19 is taken out of the cavity 16. The punched portion of the powder material 17 is kept outside of the cavity 16, and is filled the through hole 3 after the punch pin 15a is pulled off. After taking off the powder-formed product 19, the powder material filling the through hole 3 is removed. Furthermore, the powder-formed product is sintered, and a part of the surrounding wall 26 of a through hole 25a is cut off for forming a pair of leg portion 24 connected to a base portion 23 and an undercut portion 25.

Description

5. Description of the invention (

Cheng Zongda A7 B7 The present invention relates to a method for manufacturing a powder compact and a manufacturing device thereof, which are used to manufacture a powder compact having a through-hole connected to a bottom portion, or a pair of legs with a bottom portion connected And a powder molded body having an undercut portion formed between the two leg portions. Conventional mechanical parts' include shaped bodies similar to those shown in Figs. 1 (a), 1 (b), and 3 (a). Among them, the molded body shown in Fig. 1 has a rack 2 'at the front end of the base portion 1 and is formed with a shaft hole 3 penetratingly connected to the portion of the base portion 1. Also, the molded body shown in FIG. I (b) is provided with a hook portion 5 at the front end of an arm 4 extending from the base portion 1, and a shaft hole 3 penetrating through a portion connected to the base portion 1 is formed at the same time. In addition, the forming system shown in FIG. 3 (a) is composed of a hook portion 22 provided at the front end of the rod portion 2 and a pair of feet connected to the base portion 23 with the rear end portion of the rod portion 21 as the base portion 23. 24, 24 is formed, and between the leg portions 24, 24 has a lower cut portion 25. (Please read the note on the back before filling in this page.) Irrsm Binding — A member of the Intellectual Property Bureau of the Ministry of Economic Affairs, Cooperative F. Cooperative Society has two methods for printing mechanical parts with the shaft hole 3 or the undercut 25 by powder molding. The former is to first sinter the powder compact without the shape of the shaft hole 3 or the undercut 25, and then set the shaft hole 3 by drilling or the cutting process. The latter is to form the shaft at the same time when the powder is formed. f L 3 or undercut 2 5 When I want to perform drilling or cutting processing on the sintered powder compact as in the former, the implementation of powder molding is to use a mold that has mold holes in the vertical direction along the shape of the compact as desired. 'And a pair of punches inserted into the 4 mold holes under the mold to perform. First, a mold groove formed by the mold hole and a punch inserted into the mold hole from below the mold hole 1 V. Description of the invention (2) Filler powder. Then, the material powder is pressurized by the upper and lower punches, and then compressed to a predetermined thickness, and then the powder obtained by taking out from the mold hole is formed. Then * after sintering the powder compact, the shaft hole 3 is formed by drilling or the undercut portion 25 is formed by cutting. However, in this manufacturing method, drilling or cutting by drilling is very labor-intensive and expensive. Also, the powder forming device used when forming the shaft hole 3 or the undercut 25 at the same time as the powder forming is required. In addition to the aforementioned mold and the upper and lower punches, the powder forming device must also have-it can advance and retreat to shape the shaft hole 3 Or the cross punch or inner ring in the pressing direction and vertical direction required for the shape of the undercut 25. The known method firstly uses a powder forming device having a cross punch for shaping the shape of the shaft hole 3 or the undercut 25. The method is that the cross punch is formed by the die hole and the punch. In the state of the die cavity, the material is filled with young powder, and the material powder is compressed to a predetermined thickness by the upper and lower punches, and then the transverse punch is pulled out from the obtained powder compact, and the powder compact is then oriented toward Pull out above the mold hole. Since the manufacturing method is filled with powder in a state where the cross punch penetrates the die slot, it is impossible to uniformly fill the material powder in the part under the cross punch in the die slot, especially in the shaft hole 3 or undercut When the thickness around the portion 25 (the base portion 1 or the feet 4 24) is thin, the shape of the powder compact may not be formed. The second method is to use an inner ring that is provided with a shape corresponding to the shape of the shaft hole 3 or the cut portion 25 in the mold groove. This method is to fill the powder I with the inner branch, and the mold is filled with the material. The opening of the groove is fortified into the upper part, and the material powder is pressed to obtain a compact by compression.该 内环 系 The inner ring system

A7 ---______ B7__________ Printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs 5. Description of the invention (3) Caused by those who can be freely removed from the compact after compression and compression, so it can be pulled out of the compact A molded body having the shaft hole 3 or the undercut portion 25 is obtained. However, when using this manufacturing method, it is difficult to make the material powder above and below the inner ring dense when the material powder is filled. And 'another method is to fill the material powder in the die cavity formed by the mold hole and the lower punch, and press the upper and lower punches to compress the material powder.' The shaft hole 3 or the undercut portion 25. However, in this manufacturing method, when the powder compact obtained by pressurization and compression is punched with the punch for punching, the powder compact may have cracks and defects. Furthermore, any of these manufacturing methods using an inner ring or a punch for perforation is used to manufacture the shaft hole 3 or the undercut portion 25 as shown in Fig. 1 (b) or 3 (a), for example. When a part of the periphery (base 1 or leg 24) becomes thin, when the formed body having the shaft hole 3 or the undercut portion 25 is demolded, the thinned part may be damaged. In addition, in the sintering process after powder forming after forming the undercut portion 25, warping or the like may occur in the leg portion. It is an object of the present invention to provide a manufacturing method which can easily and without breakage produce a powder compact having a through hole or an undercut portion, and eliminates the above-mentioned defects. It is another object of the present invention to provide a manufacturing apparatus which is applicable to a method for manufacturing a powder compact having the aforementioned mold hole or undercut. To achieve these objectives, the method for manufacturing the powder compact of the present invention is composed of the following steps, namely: (Please read the precautions on the back before filling this page)

I ^ σ Tir; a IB tl7 rn ^ (ΓΚΙ ^ Λ.! 4.9 X 9M7) A7 ----- BL _ V. Description of the invention (4) " ^--The step of filling the powder in the mold cavity, where The mould slot is formed by a mould having a mould hole in the vertical direction and a lower punch inserted below the mould hole into the mould hole, and the shape of the mould hole follows a connection at the bottom. Some of the powder shaped bodies with through-holes are out of shape; a step iron for preparing a preformed body, which is a material powder filled with plastic mold material and inserted above the mold hole into the punch and The aforementioned lower punch is used for preliminary compression to prepare a preformed body; a step of making a through hole is to insert a preform into the preformed body by a piercing pin having a shape corresponding to the cross section of the aforementioned throughhole branch. A puncher in the shape of a through hole; a powder molding system taking step, which maintains the state of inserting the punch-through pin, and presses the above-mentioned pre-formed body through the upper and lower punches to compress it to obtain powder molding Body; a step of pulling out the punching pin, which is pulled out from the aforementioned powder compact The step of piercing the pin; and the step of taking out the powder compact, which consists of taking out the aforementioned powder compact from a mold cavity. According to the manufacturing method of the present invention, 'first', the lower punch is inserted from the bottom of the mold to the mold hole, and the lower punch and the mold hole form a die groove. Next, the die cavity is filled with a material powder. After the filling of the material powder 0 is completed ', the upper punch is inserted from the upper direction of the mold toward the mold hole, and the material powder is preliminarily compressed between the upper and lower punches to obtain the aforementioned preliminary formed body. At this time, since the inner ring is not provided in the cavity, the material powder can be filled with a uniform density.

Next, the punch-through pin is inserted into the preliminary formed body. At this time, the material powder is in a state of preliminary compression as described above, so the shape of the through hole can be easily made by the puncture pin. Next, while maintaining the state that the punching pin is inserted into the preform, the preform is compressed by the upper and lower punches. In this way, the piercing pin has an action like an inner ring ', and a powder compact having a through hole following the shape of the piercing pin can be produced. This preliminary forming system is obtained by preliminary compression to fill the powder of the material with a uniform density. Therefore, by further pressing to compress the preliminary formed body ', although the piercing pin is still inserted therein, the material powder above and below the piercing pin does not have a non-uniform density. Next, the punched-out pin is pulled out from the obtained powder compact and the powder compact is released from the mold to obtain a finished product. In addition, the method for manufacturing a powder shaped body of the present invention includes the following steps: a sintering step, which is a step of sintering the powder formed body obtained from the aforementioned mold cavity; and a step of forming a leg portion and an undercut portion, which are A part of the four walls forming the through holes of the sintered powder formed body is cut away to form a pair of chattering portions connected to the bottom and the lower cutout portions formed between the two leg portions. The powder-molded body after the demolding is formed with a thin portion 'on the peripheral wall of the through-hole', but the thin portion of 50 mm itself is the peripheral wall of the through-hole, and is connected by a portion facing the base ', thus sintering It can suppress deformation and reliably prevent warping, etc. a. Therefore, after sintering the powder-molded body that has been demolded, it can be obtained by cutting out a part of the peripheral wall forming the through-hole—doudou Duan Lian (Please read the notes on the back before filling out this page) The paper size printed by the Consumer Cooperatives of the Intellectual Property Bureau of the Ministry of Economic Affairs, using the Chinese National Standard (CNS) A4 specification (2j〇X 297 issued) 1 W · ΐί ^ ··-·,-· ------------- xin r equipment ----- r --- order --------- #. ',: .- ----- J ------------------% A7 __B7 V. Description of the invention (6) Parallel feet formed on the base and formed between the two feet Powder molded body of the undercut. When forming a powder formed body having the leg portion and the undercut portion, if the pair of leg portions are to be parallel to each other, the through hole must be a pair of parallel portions extending from the base portion. By cutting the part of the through hole facing the base, a second formed body having a pair of parallel legs connected to the base can be formed. According to the manufacturing method of the present invention, since the thin portions around the through-holes during the aforementioned sintering will not be deformed such as warping, it is possible to give the leg portions excellent parallelism. In the manufacturing method of the present invention, in the step of inserting the punching pin into the preliminary formed body and punching the shape of the through hole, the punched material powder is retracted out of the die groove and stored, and at the same time In the step of pulling out the punch-out pin from the powder compact, the stored material powder is buried in the through-hole after the punch-out pin has been pulled out, and after the powder compact is taken out of the die slot, Then, the material powder buried in the through hole is removed. In this manufacturing method, after the punch-through pin is pulled out of the powder compact obtained by further pressing and compressing the preliminary compact, if the through-hole is made hollow, the powder compact is removed. When molding, the thin part will have worrisome worries. Therefore, when the punch-through pin is inserted into the preform and the shape of the through-hole is punched, the punched-out material powder is withdrawn to the die cavity and stored. Then, while the punched pin is pulled out from the powder shaped body obtained by the compression and compression, as described above, the retreated material powder is buried back to the through hole after the punched pin is pulled out. Because the repelled material powder is compressed as described above in the month * 1, its shape will not collapse during the retreat P — Μ --- (Please read the precautions on the back before filling this page) Order -ν ··; ------------------------

The consumer cooperation of the Intellectual Property Bureau of the Ministry of Economic Affairs is printed by Du. V. Description of the invention (Bad, but can be easily buried in the through hole. Second, when the formed body is demoulded, the formed body is borrowed into Xuanbei The material powder of the through hole is used to strengthen the thin part, so it can be taken out without damaging the molded body after demolding D. After removing the material powder buried in the through hole, it can become a finished product. The worn material powder can also be recovered and reused without being buried in the through hole. As described in the manufacturing method of the present invention in which the penetrated powder material is buried in the through hole, a powder formed body having the following components can be borrowed It is advantageous to manufacture the device. The components include: a mold, which has a mold hole in the vertical direction, and the shape of the mold hole follows a powder-formed body with a through hole at the part connecting the base. Outer shape; an F punch is inserted into the mold hole from the bottom of the mold, and together with the mold to form a mold slot for filling material powder; an upper punch is used by the Insert this above the mold In the die hole, 俾 is pressurized together with the lower punch to compress the material powder filled in the die groove; a punching pin 'has a cross-sectional shape corresponding to the cross-section of the through hole, which is set in the mold And facing the die slot, a pre-formed body t formed by preliminary compression of the material powder by two upper and lower punches can be inserted to make the shape of the through hole; and a buried pin corresponding to the through hole The cross-sectional shape of the cross-section of the hole is set in the mold and faces the slot and is opposite to the punching pin. When the punching pin is inserted into the preform, it can be synchronized with the punching pin. and then

--------------------- © 装 ----- r --- Order --------- ^, .., ¾ ______ ^ ___ 1 -V. IIII! JI — IIIII ί I (Please read the precautions on the back before filling out this page) A7 B7 Description of the invention (8) Retreat 'When the puncture needle is pulled out from the preform, it can be synchronized After the puncture needle is advanced, the material powder is buried in the through hole. According to the manufacturing apparatus of the present invention, when the punch-through pin is inserted into the preliminary formed body to punch the shape of the through-hole, the buried pin relative to the punch-through pin moves backward while the punch-through pin advances. As a result, the material powder having the same shape as the through-hole punched by the punch-through pin is held by the punch-through pin and the buried pin, and backed away from the buried pin, and maintains its original shape. Keep it. When the punch-through pin is pulled out from the preliminary formed body, the buried pin is advanced while the punch-through pin is retracted. As a result, the material powder stored after the buried pin is retracted is held by the piercing pin and the buried pin, and is moved back to the through hole. (Brief description of the figure) Fig. 1 is a perspective view illustrating a powder compact, and Fig. 2 is a cross-sectional view illustrating a manufacturing apparatus and a method for manufacturing the powder compact shown in Fig. 1. Fig. 3 is a perspective view of another example of a powder compact; Fig. 4 is a cross-sectional view below the IV-IV line in Fig. 3; Fig. 5 is a top view below the IV-IV line in Fig. 2 (a). Next, an embodiment of the present invention will be described in further detail with reference to the attached drawings > First, regarding the first embodiment of the present invention, the first picture (a) or the first (please read the precautions on the back before filling in this page) Agricultural ilIrltl Order! ---- S — line -'------------------------ Ke, "Λ / 1 JtU is not wide, -Chuan 7 Ί A7- -------- B7_ V. Description of the invention (9) The case of manufacturing powder compacts shown in Figure (b) is taken as an example and explained. The powder forming system shown in Fig. 1 (a) and Fig. 1 (b) is the user of a mechanical part as described above. The forming body shown in Fig. 1 (a) has a rack 2 provided at the front end of the base 1 And a shaft hole 3 formed by penetrating and connecting the part of the base 1, the shaped body shown in FIG. 1 (b) has a hook 5 and a shaft 3, and the hook is provided on the arm 4 extending from the base 1 The front end of the shaft hole is formed by penetrating the part connecting the base 1. In this embodiment, the “device for manufacturing a molded body shown in FIG. 1 as shown in FIG. 2 (a)” includes a mold 12 having a mold hole in a vertical direction, and the mold 12 is provided below the mold 12. The punch 13 inserted under the mold hole 11 and the punch 14 inserted into the mold hole 11 from above the mold 12 are inserted. The mold hole 11 is a shape following the vertical shape of the powder-shaped body when the shaft hole 3 of the powder-formed body shown in FIG. 1 is horizontally arranged. Inside the mold 12, facing the mold hole 11, a punching pin 15a and a buried pin 15b corresponding to the cross-sectional shape of the shaft hole 3 are oppositely provided. In this device, the mold 12, the lower punch 1 3, the upper punch 丨 4, the piercing pin 15a and the buried pin 15b are controlled by a control device not shown in the figure. This control device uses a microcomputer having a CPU, RAM, ROM, and the like. Next, a manufacturing method according to this embodiment will be described with reference to FIG. 2 (a) or 2 (f). First, as shown in FIG. 2 (a), since the upper punch 13 is located below the die hole 11 of the die 12, the die slot 16 can be formed by the die hole u and the lower punch 13. At this time, the upper punch 14 is above the mold hole 14, and the punch-through pin 15a and the buried pin 15b are waiting at positions where the front end faces the mold hole. m Μ Printed by the Consumer Affairs Bureau, Intellectual Property Bureau, Ministry of Economic Affairs

It 11 I installed · ---- *! — Order --------- Wire connection ^ ------------------------- (Please read the precautions on the back before filling this page) A7 B7 V. Description of the invention (10) Here, the powder material is filled into the mold groove 16 by a feeder not shown in the figure. As the powder material 17, a powder of an iron-based metal or the like can be used. Next, as shown in FIG. 2 (b), the upper punch 14 is lowered and the material powder 17 filled in the die groove 16 and the lower punch 17 is preliminarily compressed to form a preform 18. The preliminary compression refers to The material powder 17 may be compressed to such an extent that the shape of the preformed body can be maintained, and it is not necessary to compress it excessively. This preliminary compression usually compresses the material powder by 20-30%. Next, as shown in Fig. 2 ', the punch pin i5a is inserted into the preform and the shape of the shaft hole 3 is formed. The buried pin is retracted by 1 point while the punch-through pin 15a is advanced. Result * The piercing pin 15a is inserted into the part of the mold where the buried pin was once arranged. The material powder pierced by the preformed body 18 (a part of the preformed body 18) by the piercing pin 15a is used for punching. In the state held by the pin 15 & and the buried pin i5b, 'retreat to the part where the buried pin 15b inside the mold 12 recedes. 'The material powder 17 is then stored inside the mold 12. Secondly, as shown in Figure 2 (d), the pin will be penetrated! 5a is maintained in the inserted state, and the preform 18 is compressed and compressed between the upper punch 14 and the lower punch 13 to finally form a powder having a shape as shown in FIG. 1 (a) or 1 (b). Shaped body 16. Next, as shown in Fig. 2 (e), the piercing pin 15a is pulled out from the powder compact 19. At this time ', if the mold 12 and the upper punch 14 are raised slightly in advance to relieve the internal stress formed on the powder compact due to the aforementioned compression and compression, the punch-out pin 15a can be easily pulled out. When the breakdown pin goes back 5 a, the buried pin 15 goes forward at the same time as the back. Then 'as shown in Figure 2 (e), before the breakdown of the pin 15a and the burial of the pin 15b ~ ~ ---.' 汍 Along the "China Environmental Standards (CNS) A4 regulations; (Vatican) '< Please read the precautions on the back before filling out this page) The Intellectual Property Bureau of the Ministry of Economic Affairs CS' industrial and consumer cooperation seals --------- line: ------ ι- ί --------------- Α7 Α7 Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs 3, printed by the cooperative B7 V. Description of the invention (η) The end is returned to the state facing the mold hole 1 1 . As a result, the material powder 17 stored in the mold 12 in the state held by the piercing pin 15a and the buried pin 15b is buried in the shaft hole 3 of the powder molded body by being pressed by the buried pin 15b. in. Next, as shown in FIG. 2 (f), the mold 12 is lowered while the powder compact 19 is gently held by the upper punch 14 and the lower punch 13, and the powder compact is knocked down, and then the upper punch is punched. The head 14 rises and moves above the mold hole 11 to release the powder compact 19. The powder compact 19 reinforces the thin portion of the base portion 1 by embedding the preliminary compressed powder material 17 back into the shaft hole 3 '. Therefore, as described above, the thinned portion is not damaged when pulled out, and a finished product with a complete shape can be obtained. After the powder compact 19 is removed from the mold, the powder material 17 embedded in the shaft hole 3 is removed and sintered, so that it can be formed into a shape as shown in Fig. 1 (a) or Fig. 1 (b). The powder material 17 is only filled in the shaft hole 3 and is not integrated with the powder compact, so it can be easily removed by a blower or the like. Next, a second embodiment of the present invention will be described by manufacturing a powder compact having a shape as shown in Fig. 3. As shown in FIG. 3 (a), the powder compact body as described above is used as a mechanical part, and the hook portion 22 located at the front end of the rod portion 21 and the rear end portion of the rod portion 21 as the base portion are connected to the base portion as described above. It consists of a pair of parallel feet 24'24, and there is a lower cutting part 25 between the feet 24 and 24. In this embodiment, in order to form this powder compact, it is first manufactured as shown in FIG. 3 (b) Powder compact. As shown in Figure 3 (b), the powder forming system is provided at the connecting portions 26, 26 connected to the base portions 24, 24. The paper size is applicable to the national standard (CNS) A4 specification (2). 297 mm) H ί I n / nnn Λ t ϋ kia «n i_ai nn I lk nnn I 1— nnn 1 It I nnli (please read the precautions on the back before filling this page) 5. Description of the invention (I2) A7 and B7 are the undercuts 25 shown in FIG. 3 (a) with the through holes 25a formed around the leg portions 24, 24 and the connecting portions 26, 26. As a result, the through hole 25a is formed into a shape having parallel portions 24, 24 extending from the base portion 23 in addition to the base portion 23. The powder compact as shown in FIG. 3 has the same structure except that the shaft hole 3 of the powder compact shown in FIGS. 1 (a) and 1 (b) is changed to a through hole 25. Therefore, According to the sequence of Figure 2 (a) or Figure 2 (f), it can be formed together with the embodiment of the first jade. In this embodiment, the powder compact body 19 shown in FIG. 2 (f), because the temporarily compressed powder material 17 is buried in the through hole 25a, the thin portion of the periphery of the through hole 25a can be strengthened. (Specifically shown in the foot of Figure 3.) Therefore, despite being pulled out and demolded as described above, the thin feet will not break the intellectual property staff of the Ministry of Economic Affairs. The cooperative stamp η The powder compact 19 is removed from the through hole 2 ^ after the demolding. The powder material 17 is sintered, so that it can be formed into a shape as shown in FIG. 3 ({5). Since the powder material 17 is filled in the through-hole 25a only and is not integrated with the powder compact, it can be easily removed by a blower or the like. Next, the powder compact 19 is sintered to obtain a compact in which powder materials are combined with each other. During sintering, since the leg portions 24 and 24 are connected by the connection portion%, deformation such as warpage is not caused, and excellent parallelism can be obtained. ', Lamp Next, the sintered powder compact 19 is cut at an imaginary line position shown in Fig. 4 and the connecting portion 26 is cut off. As a result, the base side facing the through-hole can be opened, and as shown in FIG. 3 (a), the connecting base is aligned —------------ T zhongshangjia standard (CNS) yy specifications (twenty one()

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V. Description of the invention (1) The consumer cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints the feet 24, 24 'and the lower cuts 25 are formed between the feet 24, 24, so that a desired powder compact can be obtained (No. 2 formed body). The cutting of the connecting portion is only a cutting step, so the undercut portion 25 can be formed more easily than by cutting into a block-shaped powder formed body. The cutting of the connecting portion 26 can be performed by itself A known device performs this. Also, in this embodiment, the through-hole 25a has the shape of the parallel portions 24 and 24 extending from the base portion 23. However, the shape of the through-hole is not limited to this, and the paired legs of the powder molded body The parts 24 and 24 need not be limited to parallel. In each of the foregoing embodiments, as shown in FIG. 2 (a) or 2 (f), the lower punch 13 and the upper punch 14 are regarded as a single punch. In addition, the lower punch 13 and the upper punch 14 may be divided into several parts corresponding to the shape of the powder compact to be molded. "For example, when forming a powder compact as shown in Fig. 3 (b), as shown in Fig. 5 As shown in Fig. 3, the lower punch 13a and the upper punch 14a are constituted. The connecting portion 26 of the powder compact is composed of a lower punch 13b and an upper punch 14b to constitute a leg portion 24, and a lower punch 13c and an upper punch 14c to constitute a rod portion 2 including a hook portion 22 (not shown). In addition, in each of the aforementioned embodiments, the punching pin i 5 a is inserted into the preform 18 to form the shape of the shaft hole 3 or the through hole 25 a. Store the punctured material powder 17 inside the mold 丨 2 and pull out the puncture pin 丨 5 a to bury the material powder back to the shaft hole 3 or through hole 25a. However, the punctured material powder does not have to be buried The return shaft hole 3 or the through hole 25a may, for example, cause the broken-through material powder to fall into the cavity provided in the mold 12 and be recovered. In this way, the recovered material powder will be available for reuse. It is used to manufacture powder compacts with through holes or undercuts. F Please read the precautions on the back before filling in this page} ------------ r —— * ——- install --- -Order --------- End. -II n I η · nn I · • 'V * -nA .1 χ 9〇7) Cooperative Du Yinxian staff of Intellectual Property Bureau of the Ministry of Economic Affairs Du Yinxian _W_ V. Invention Description ( I4) Comparison table of component numbers 1. Base 2. Rack 3. Shaft hole 17. Material powder 4. Arm 18. Preparing formed body 5. Hook 19. .Powder molded body 11 .. Mould hole 21 .. Mould part 12 .. Mould 22 .. Hook part 13, 13a ... Lower punch 23. Base 13b, 13c. Lower punch 24. Foot 14. 14a ... upper punch 25, 25a..through 孑 L 14b '14c.upper punch • 15a.punching pin] _5b.buried back pin 16..die slot -------------- © 装 --- (Please read the precautions on the back before filling this page) Order --------- Wire wood paper is suitable for crucibles (National Standard (CNS) A4 Specification ⑵ χ 297)

Claims (1)

The scope of the patent application is 888 8 ABCD Ministry of Wisdom. ¾ 财 4. tj X η A. The method for manufacturing powder compacts produced by the company includes the following steps, namely: a step of filling the powder in the mold groove, wherein the mold groove is It is formed by a mold with a mold hole in the vertical direction and a lower punch inserted below the mold hole into the mold hole, and the shape of the mold hole follows a portion connected to the base with a through hole. The outer shape of the powder formed body of the hole; a step of preparing a preformed body, which is prepared by inserting the upper punch of the mold hole and the aforementioned lower punch above the mold to perform preliminary compression to prepare the preform A step of making a through-hole, which is inserted into the preliminary formed body by a punching pin having a shape corresponding to the cross-section of the aforementioned through-hole, so as to make the shape of the through-hole; The step is to maintain the state of inserting the piercing pin, and press and press the aforementioned pre-formed body with two punches to compress it to obtain a powder compact. The step of pulling out the piercing lock is Pull out from the aforementioned powder compact The step of punching out the piercing pin; and the step of taking out the powder compact, which is a step of taking the aforementioned powder compact from a die cavity. '' If the method of manufacturing a powder compact according to item 1 of Shengu patent scope, the steps further include:. ν step, which is to add the powder-formed body obtained from the aforementioned mold groove; and the step of forming the foot and the undercut, which is to form the sintered powder-formed body, and the four walls of the hole Part of it is excised to form 丨 on 1, (Please read the precautions on the back before filling in this page). See "-——Order ------. Λ ------- A8 Βδ C8 -——_______ D8 6. The scope of patent application is linked to the base The foot part and the lower part formed between the two chat parts. 3. The method for manufacturing a powder compact according to the scope of the patent application], wherein the through-hole has a pair of parallel portions extending from the base portion, and the portions of the four walls forming the through-hole facing the base portion are cut out at the same time To form a pair of parallel feet connected to the base and an undercut formed between the two feet. 4 'As in the method of manufacturing a powder compact according to any one of claims 1 to 3 of the patent scope of the patent, it is the step of inserting a piercing pin into the preliminary compact to form the shape of the through hole. The deposited material powder is retracted to the outside of the pepper tank and stored. At the same time, in the step of pulling out the punching pin from the powder formed body, the stored material powder is buried in the through hole after the punching pin is pulled out. After removing the powder compact from the mold cavity, the material powder embedded in the through hole is removed. 5. —A device for manufacturing a powder shaped body, including: a mold, which has a mold hole in the vertical direction, and the shape of the mold hole follows-a powder formed with a through hole at the part connecting the base Outer body; the lower punch is inserted into the hole of the mold from the bottom of the mold, and together with the mold to form a mold slot for filling material powder; an upper punch is used by the The mold ± square is inserted into the mold hole, and the lower punch-add I, to compress and fill the powder of the material of the mold: a punch pin, with t corresponding to the cross section of the through hole The cross-sectional shape is set in the mold and facing the mold slot, and can be inserted into a pre-formed body formed by preliminary compression of the material powder by upper and lower punches to print (please read the precautions on the back first) Fill in this again ") »r ^ l-I 1 -I« Lr ^ · ν ^-I-'? Τ -------; National Standard of the Republic of Korea (C-NS > A4 now格 2 2 (1X2W 公 锋 -19- VI. Patent application scope AS B8 C8 DS The shape of the through-hole; and -Buried back lock 'has a cross-section corresponding to the through-hole The cross-sectional shape of the surface, and two: the mold faces the mold slot and is opposite to the punching lock, and the piercing pin can be synchronized when the piercing pin is inserted into the prepared body when the piercing needle is retracted. Pull from the preparation to w, then pass; Second, go back after the needle is inserted, bury the material powder back to the ί Please read the notes on the back before filling in this f) • It —1--— J-.-•-equipment_ Order the Ministry of Economic Affairs. '«-Hour <'.-; India% CNS 1: i.. ^ -20-