JPS59153803A - Molding method of collared powder molding - Google Patents

Abstract

PURPOSE:To obtain a collared powder molding having no variance in quality by packing powder for molding in a stepped die, lowering a bottom punch to form a recessed part then pressing preliminarily the powder, pushing back again the powder into the recessed part and pressing the powder. CONSTITUTION:Powder for molding is packed in the cavity of a stepped die 3. A bottom punch 2 is lowered by a prescribed extent to form a recessed part 5 atop the powder and a top punch 1 is inserted into the cavity to prepress the powder preliminarily. The punch 1 is then lowered together with a die to push back and pack the powder into the part 5. The powder is compression-molded by an ordinary press method to form a collared powder molding. The fraction defective is reduced by the above-mentioned method.

Description

[Detailed description of the invention]

The present invention (1) pertains to the powder [1] method for forming a molded article - 2. The metal powder is packed into a predetermined mold (2) and then compressed and molded.
Methods for obtaining a stepped flange molded product f have been known for a long time. The method of darning is to use the same number of steps as the molding amount.
After the molding powder is filled in the cavity (C''), the upper punch descends and starts compressing the powder. The pressing down ratio, stone t4-1: Therefore, the powder on the float and the edge was compacted to obtain a molded product. Since only the number of stages are required, the entire mold becomes complicated.During molding, the inner surface of the die and the float punch and the fixed lower punch slide, resulting in galling and seizure. Problems such as C2 frequently occur, resulting in malfunction, or the desired molded product cannot be obtained.The present invention uses a stepped die as a die for forming and sealing the cavity. In the cavity of a 5-stage 1-inch tie, before compression-molding the powder for molding (this book solves the above drawbacks by applying 20T pre-treatment).

[Second molding powder? After filling, the upper and lower punches are lowered as required to make a hole in the upper surface of the powder (the two recesses are shaped like 1), and then the upper and lower punches are inserted into the cavity to press the powder. Do it, then top A
It is characterized in that both the punch and the die are lowered by τ2 to push back the powder into the recessed portion C2 to fill it, and then compression molding is performed. The present invention is clarified with reference to the attached +iTi+. The timing that shows 1 is 1), the 2nd is 1 (a) ~ ()) 1. Mako's gram.
It is a cross-sectional view showing each state of 2)), ] indicates upper/yanchi, 2 indicates lower zero, and 3 indicates da/1. In the present invention (Odai 3t-L if: 2 kl+= as shown f) (
The 21st stage Blj 3a is made of chi 1, and a piece of wood is used to form the end piece with the flange. If there is one step in the molded product, there will be one step, and if there are two steps, there will be two points.

[One of the two molded products (
Depending on the situation, you may ask for a few digits, but 2 steps higher than q)
Molded product with flange of n-less
-11 in 1 sho, 's'? N'-product L/Jfil
D i9 C? j Shite%t, (n-1,)l T'
・You can also mold it by tightening 6 holes and adding 1 piece. Even if you use a stepped die, it is possible to omit at least one F7 die. /
Becomes city ji noh. (Eel-1 Konojou),

[Stepped section <, ~ shaped 5 prongs 11. Molding using a 1-inch die
1111-i). In Figure 1, 1 戊形 G moves from the left end to the right 11jl C direction 2). No call, riii 3ji (-1 inserted T
)Zonchi 2/]''-Constant(, To lower 1, stop at a
inside the cavity of

[1 filled It, at the doctor's ■ [・shishimojin 1000 2) and above Y(, shite C ton (1 arrive. Kobi C-yo (),
The powder inside the cavity can be shocked by 111. 1) II L-The formed briquette between the powder and the inner surface of the die is broken and the powder becomes dense. At the same time (lower 1) and when the die 2 rises τ, the powder on the surface J-, -2-O-G-70- should slide into the shoe 4. So 4. The flea removal rate is such that a certain amount of powder is densely packed in the cavity (t).From this state (point d), the punch drops again and e. When the punch 1 reaches the same height as the upper surface of the die 3, it reaches the state shown in Fig. 2 (b). As mentioned above, since the lower punch 2 has been lowered by the required dimension, a predetermined depression 5 is formed in the cavity (2) above the filled powder. 11 step c1
%l Section〆r < -j V-shaped product, thick flange 2 is required, and the final fullness of the flange is ζC2. Next, from the 0 point to the f point 1-toro II (-the first stage is performed.The state in which the die 3 and the lower punch 2 are stopped (tL) 2, press the 10 punch 11) - descend into the cavity of the die 3 (2) and insert it. When the part 5 is in the shape of I 戊Compared, it is compressed to a certain extent by Hypunch 1 and 2. After I finish,
Die control is performed to make the depressed part 5 (two powders push back 1~, 7).Die control 91
The lower punch 2 car stops +h and the die 3 and ``-punch 1711 descends with the same concubine [-therefore, it is done. ψ, 31 N1 shows the details of the main part of 1-0
, LH1+2 from point f to g, ton in the same figure is the ratio when the die control is performed. In other words, since die 3/liγd upper and gunchi 1 descend at the same speed, the digit relationship with die 3 and upper/yanachi l is established.
There is no Oki f fin, but the lower Yanchi 2 is relatively inside the die 3 [
The powder in the cavity (lower punch 2' goes up and presses down) 11.
. Front t1-4 Inside the depression 5 (2 The surrounding powder moves and enters. In the 21st step 1) (2) As shown (2, the depression is empty and filled with powder) Therefore, the powder inside the cavity is located at the step part, body part tl, zo), J
J H + (lack of filling) (7) Inconsistent quality of molded products (1). As above (-shi, te, cave-in to IS shape 1) see, tl)
- Tsukobi υorE and Hidaikon I Roll (-The preparation of powder filling of the depressed part <2p pl f143 completed, hereafter referred to as C1 Conventional 1 Yu) will be carried out. Kov)? il' come 1 mountain 11 (j) F0less is Vlj
2, floating tie +iLA combination (2, 3pm)
1> From g point to h point τ of C1 - as shown (-5 upper punch)
As the die descends and presses the powder, the die also slows down (-
As the lower punch 2 (by 2) is lowered and relative (raises 1 gun and Gunchi 2 l') and trr+ + sheep, press from the final 1 part 1 and then from point h in Figure 3. Point i (as shown in 2 [Nidai 3 and lower punch 2'"F, +
By lowering only the upper and lower arms of I-, L/T and performing the second after-breath to create the state shown in Fig. 2 (E), the .This conventional method
) Ri) Press back hair 1, Figure 1 τ2i < 4-, j point θ・etc. +,! , j (24 punch 1 die 3° F A' punch 2 r (-19・2 rises, J=,
, 9 inches 1. Dai 3 is the original (11 t(2 fi ”',
-1'iL, the lower punch 2 rises (2 ゛ [ljV, the shaped part is pushed out from inside the cavity, the 21st step 1 (toward)
1) The extrusion of 1 commercial product is carried out. The fourth plan is -1's i\invention forest (2 f11: usage (1, i) da f sen) fi4. N total 1f'J //) j1
'1' 5-71 Kube'i: Ii Iiii: jn1
1), code and name (2 indicates the valley, details and details are omitted, but) 1 upper ram, 12 (1 cylinder for die control, 13B its bisto/rod, 14
&-4 bracket 15 (214 zo 1ll=j'i even #
At t, the lower end of the convex 1n piston rod 13 (the lowering timing '7- of the die 3 when the two abut) is -'! I-Seike? I will help you with 16 rams, 1 ram and 4 bowls.
1" d town' hand, 37b o upper punch 1 () add 10 punch plate rate, 18 is 10/2 inch plate upper V'
1lijl', Guy 1' rod for (Guide No.-Z). 21 (Drying plate, 2
The upper surface of the 2-digit stance 24 (-(艮()) 11,
The thickness of the chest/〈fhi゛4-4) causes the descent of die 3)i
Adjust the lower stop block, 23 & determine the upper limit of the die plate 21 (t7), and set the lower end of the lower end of the rod, 25 & 4 distance 24
['ylf2 storage is compared, 26 is 1d1 constant solate, 28! t')”Punch 2 time plate, 29
is its guide Ronodo, 30 is ff1fl MQ 14
'IF F0L/-T 31 two screws together F/P ■l
I with f=1 plate 28! ,! 14 drops and 10 drops? Nchi's T¥? F-, clear key ii 4-section lower number ♀ ♀ g) stop toe screw, 31 is for extruding from inside the molded product capacity (1,000.7 inch 2 ['-extrusion to transmit upward chipping) 0 race 1, 32 is the lower ram of the press and 33 is the porsus. With such a design, it becomes possible to create a press car using the method of the present invention (-).
= Yottge, stepped die for protection 1. Therefore, it is possible to omit at least one lower part of the lower part, and the f'L power applied between the lower part and part of the part is smaller (r').
) +, it is possible to prevent troubles such as seizure C''' and malfunctions caused by it, and the mold is also simplified, which reduces the number of failures.Furthermore, ( 2) There is no variation in quality, and the defective rate can be drastically reduced. 4. (21 pieces of simple H4' @ everyone, Ming 2 p1 1 point Ming method showing timing, diagram!!'! 2 Figures 1 (a) to (g) respectively ``Bogata's Cross section showing the condition 1m1, Fig. 3~IJ1n1) Maki F (1
(No. 4 Hirodai 1 Momme, Mei 41 Monme Daicent and Metalwork (Suno 3 Cross section showing f3-11 1'l/l. 1...Top/Punji, 2...Bottom) 3...Die. 5...Depression Department Agent Patent Attorney - Fraud 11.: 4)':'Child 1 year old ah figure bu 4 figure

Claims (1)

[Claims] Inside the cavity of the thigh kedai (DC filled with powder for second molding)
2. Lower the lower punch, cut out the upper surface of the powder (2 depressions) and insert the primary C-upper punch into the cavity to apply pressure to the powder, and then Lower the upper part of the die and the full width of the die (2) and fill the recessed part (2) with powder, then conventional elongation 11 (D 7' less method) Molding using metal?Characteristic No. 1 powder low-shaped product molding method.