CN205270858U - Powder metallurgy die with high -efficient drainage structures - Google Patents
Powder metallurgy die with high -efficient drainage structures Download PDFInfo
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- CN205270858U CN205270858U CN201520945311.5U CN201520945311U CN205270858U CN 205270858 U CN205270858 U CN 205270858U CN 201520945311 U CN201520945311 U CN 201520945311U CN 205270858 U CN205270858 U CN 205270858U
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Abstract
The utility model relates to a powder metallurgy field especially relates to a powder metallurgy die with high -efficient drainage structures, and it includes the lower mould, goes up the mould and becomes the die cavity, becoming the die cavity and being airtight appearance chamber, it is closed by last mould and lower cover and forms, become the die cavity top and be equipped with absorb water passageway and airflow channel, the one end of the passageway that absorbs water and the intercommunication that becomes die cavity intercommunication, the other end and airflow channel. Moisture content in the powder metallurgy die is blown out the mould under the effect of air current, realize the timely evacuation of ponding in the mould, has reduced the drainage resistance of the passageway that absorbs water, the reduction of extruding along with moisture content in the shaping later stage simultaneously, the initiatively suction of adsorption of air current formation become the die cavity with absorb water the moisture content of remaining in the passageway, very big promotion the drainage time during elements forming, improved promptly powder metallurgy die's shaping efficiency, also greatly reduced during the die sinking, remaining moisture content is followed it drips the probability that forming part went up and led to the fact the damage to become the die cavity top.
Description
Technical field
The utility model relates to field of powder metallurgy, particularly relates to a kind of powder metallurgy mould with efficient discharge water structure.
Background technology
In field of powder metallurgy, it is necessary to the powder materials with moisture is formed part by the compacting of forming mould. The wet powder forming machine of current domestic normal employing completes the moulding process of part; Compression moulding process after wet powder and slurry have been injected needs discharged by moisture. Owing to wet powder is slimy raw material, so forming airtight cavity volume inner just requirement of forming mould, determining the direction discharging moisture simultaneously and only having upwards.
Existing wet powder forming machine all adopts negative pressure water suction method to be discharged by the moisture in wet powder when shaping. As shown in Figure 1, forming mould comprises upper mold half 11 and lower mold half 12, forming mould is stopping property (inner vacuum) for the cavity volume 10 of forming parts, also it is connected and it is provided with upwards drainage pipeline 20, being connected above drainage pipeline 20 and be provided with water storage cavity 30, water storage cavity 30 top is provided with water sucking mouth 40. Cause in pressing process, after in wet powder, moisture enters the water storage cavity 30 above cavity volume 10 by drainage pipeline 20, and stop in water storage cavity 30 and drainage pipeline 20, after forming parts, opening mold, under suction function, moisture could be discharged from the water sucking mouth 40 that upper mold half 11 is provided with, and therefore this kind of negative pressure water suction method is just in forming parts process, reaches object that metal-powder is separated with moisture; This kind of drainage pattern, the moisture velocity of discharge is slow, when the moisture of wet powder is a lot of time, can not completely by moisture and powder separation, drainage efficiency is low, thus extends the shaping time. In addition, owing to current moisture is in the water storage cavity 30 and drainage pipeline 20 being stored temporarily in upper mold half 11 after discharging, when die sinking, when cavity volume 10 loses airtight vacuum state, the moisture discharged just can be siphoned away discharge by negative pressure, but, some water can drop on molded part under self-gravity action all the time, and part is caused damage.
Practical novel content
The purpose of this utility model is to propose a kind of powder metallurgy mould with efficient discharge water structure.
For reaching this object, the utility model by the following technical solutions:
A powder metallurgy mould with efficient discharge water structure, comprises counterdie, patrix and forming cavity;
Illustrating further, described forming cavity is closed containing cavity, and it is covered by described upper die and lower die; Being provided with the gentle circulation road of water absorption channel above described forming cavity, the air inlet end of described air-flow passage is connected with gas source; One end of described water absorption channel is connected with described forming cavity, the other end and described air-flow channel connection.
More excellent, it is inner that described water absorption channel and described air-flow passage are located at described patrix.
More excellent, described air-flow passage is horizontal linear passage.
More excellent, described water absorption channel is Vertical Channel, and its one end is connected with described forming cavity top, and the other end is connected with the sidewall of described air-flow passage, and makes described water absorption channel and described air-flow channel connection.
More excellent, the radial dimension of the air inlet end of described air-flow passage is bigger than the radial dimension of described other positions of air-flow passage.
More excellent, the radial dimension of described water absorption channel is less than the radial dimension of described air-flow passage.
More excellent, it is provided with multiple described forming cavity and described water absorption channel, and multiple described water absorption channel is connected respectively between described air-flow passage and multiple forming cavity.
The utility model is according to foregoing, it is proposed to a kind of powder metallurgy mould with high speed discharge structure, and its patrix being provided with and counterdie cover after forming described shaping cavity volume chamber, then are injected in described forming cavity by wet powder, while described patrix and described counterdie carry out pressing, gas source is to conveying high-pressure gas in described air-flow passage, make the quick flow forming single direction in described air-flow passage, and then it is poor at described water absorption channel two ends formation air pressure, the moisture being extruded out in wet powder is made to be drawn in described air-flow passage by described water absorption channel, finally along with the air-flow in described air-flow passage is discharged fast from described exhaust side. moisture in described powder metallurgy mould is blown mould under the effect of air-flow, realize the emptying in time of mould internal water accumulation, decrease the resistance of water drainage of water absorption channel, the minimizing that phase is extruded along with moisture after shaping simultaneously, the adsorption that air-flow is formed can also forming cavity described in sucking-off and the residual moisture in described water absorption channel on one's own initiative, improve water discharge time during forming parts greatly, namely improve the shaping efficiency of described powder metallurgy mould, when also greatly reducing die sinking, the moisture of residual drops onto molded part above described forming cavity and causes the probability of damage.
Accompanying drawing explanation
Fig. 1 is the sectional structure schematic diagram of powder metallurgy mould in prior art;
Fig. 2 is the sectional structure schematic diagram of an embodiment in the utility model;
Fig. 3 is the cross-sectional schematic of embodiment part-structure when upwards mould moves of counterdie when carrying out pressing and forming in Fig. 2.
Wherein: patrix 100, counterdie 200, forming cavity 300, water absorption channel 400, air-flow passage 500, arrow A is moisture discharge direction, and arrow B is the direction that described counterdie moves pressing.
Embodiment
Below in conjunction with accompanying drawing and by embodiment, the technical solution of the utility model is described further.
As Figure 2-3, a kind of powder metallurgy mould with efficient discharge water structure, comprises counterdie 200, patrix 100 and forming cavity 300; Described forming cavity 300 is closed containing cavity, and it is covered with counterdie 200 by described patrix 100; Being provided with the gentle circulation road 500 of water absorption channel 400 above described forming cavity 300, the air inlet end of described air-flow passage 500 is connected with gas source, and the exhaust side of described air-flow passage 500 is in communication with the outside; One end of described water absorption channel 400 is connected with described forming cavity 300, and the other end is connected with described air-flow passage 500. Described patrix 100 and described counterdie 200 cover after forming described shaping cavity volume chamber, then are injected to by wet powder in described forming cavity 300; While described patrix 100 and described counterdie 200 carry out pressing, gas source is to conveying high-pressure gas in described air-flow passage 500, make the quick flow forming single direction in described air-flow passage 500, and then it is poor at described water absorption channel 400 two ends formation air pressure, the moisture being extruded out in wet powder is made to be drawn in described air-flow passage 500 by described water absorption channel 400, finally along with the air-flow in described air-flow passage 500 is discharged fast from described exhaust side.
It is inner that described water absorption channel 400 and described air-flow passage 500 are located at described patrix 100. Described water absorption channel 400 and described air-flow passage 500 are wrapped up by described patrix 100, play the effect of both protections so that the one-piece construction of described powder metallurgy mould is more stable, compact, install space less.
Described air-flow passage 500 is horizontal linear passage. If described air-flow passage 500 is bending, can make air-flow and moisture by time hindered, and speed can become slow after airflow obstruction, the Negative Pressure Difference that described water absorption tube two ends are formed will corresponding reduce, and then the drainage efficiency causing described powder metallurgy mould reduces greatly; If air-flow passage 500 is not horizontally disposed, the moisture in air-flow passage 500 can be caused to be moved under gravity, and be no longer only be subject to the drive of air-flow and move, the moisture being drawn to described air-flow passage 500 from described air intake passage is moved by power and there is no rule, controllability becomes low, and described metallurgical dies drainage efficiency also can be caused to reduce.
Described water absorption channel 400 is Vertical Channel, and its one end is connected with described forming cavity 300 top, and the other end is connected with the sidewall of described air-flow passage 500, and described water absorption channel 400 is connected with described air-flow passage 500. Making water absorption channel 400 length between described forming cavity 300 and described air-flow passage 500 the shortest, moisture is more smooth and easy to be just sucked out fast.
The radial dimension of the air inlet end of described air-flow passage 500 is bigger than the radial dimension of described other positions of air-flow passage 500. When using identical gas source so that the interior air-flow passed through of described air-flow passage 500 is more quick, and the negative pressure produced at described water absorption channel 400 two ends is bigger.
The radial dimension of described water absorption channel 400 is less than the radial dimension of described air-flow passage 500. When described air-flow passage 500 cross-sectional sizes is constant, the negative pressure produced at described water absorption channel 400 two ends by it of gas is increased with gas velocity and increases, but the variation range of negative pressure becomes very little after air-flow increases to certain value. If the radial dimension of described water absorption channel 400 is excessive, moisture needs the reactive force arrived just can move it to, in described air-flow passage 500, not even sometimes being moved under the effect of negative pressure very much after entering described water absorption channel 400. The radial dimension of described water absorption channel 400 is limited less than the radial dimension of described air-flow passage 500, after ensureing that the gaseous tension provided when gas source reaches necessarily, gas velocity thereupon on earth certain value time, the moisture in described forming cavity 300 can be sucked out smoothly.
As shown in Figure 3, described patrix 100 is fixed installation; Described counterdie 200 is positioned at the underface of described patrix 100, and it is along direction shown in arrow B, carries out pressing to described patrix 100 from bottom to top. Because the raw material that described powder metallurgy mould uses is wet powder and slurry, after wet powder is injected in described forming cavity 300, under gravity, the moisture multi-density on wet powder upper strata is little, lower layer density is big, when described forming cavity 300 compresses, drainage direction is along shown in arrow A, is also from bottom to top; Described powder metallurgy mould have employed counterdie 200 to the pressing direction that described patrix 100 moves and pressing structure, make wet powder when being molded into part density by consistent with the discharge direction of water to weak change direction by force, namely arrow A is identical with direction shown in arrow B, water discharge time when shortening forming parts, namely accelerates and shaping improves efficiency.
It is provided with 3 described forming cavities 300 and described water absorption channel 400, and 3 described water absorption channel 400 are connected respectively between described air-flow passage 500 and 3 forming cavities 300. Making described powder metallurgy mould can complete the moulding process of 3 parts fast simultaneously, and do not share same described water absorption channel 400 during the shaping draining of 3 parts, drainage procedure does not interfere with each other mutually.
Moisture in described powder metallurgy mould is blown mould under the effect of air-flow, realize the emptying in time of mould internal water accumulation, decrease the resistance of water drainage of water absorption channel 400, the minimizing that phase is extruded along with moisture after shaping simultaneously, the adsorption that air-flow is formed can also forming cavity 300 described in sucking-off and the residual moisture in described water absorption channel 400 on one's own initiative, improve water discharge time during forming parts greatly, namely improve the shaping efficiency of described powder metallurgy mould, when also greatly reducing die sinking, the moisture of residual drops onto molded part above described forming cavity 300 and causes the probability of damage.
Below know-why of the present utility model is described in conjunction with specific embodiments. These describe just in order to explain principle of the present utility model, and can not be interpreted as the restriction to the utility model protection domain by any way. Based on explanation herein, the technician of this area does not need to pay creative work can associate other embodiment of the present utility model, and these modes all will fall within protection domain of the present utility model.
Claims (7)
1. one kind has the powder metallurgy mould of efficient discharge water structure, it is characterised in that, comprise counterdie, patrix and forming cavity;
Described forming cavity is closed containing cavity, and it is covered by described upper die and lower die;
Being provided with the gentle circulation road of water absorption channel above described forming cavity, the air inlet end of described air-flow passage is connected with gas source;
One end of described water absorption channel is connected with described forming cavity, the other end and described air-flow channel connection.
2. a kind of powder metallurgy mould with efficient discharge water structure according to claim 1, it is characterised in that, it is inner that described water absorption channel and described air-flow passage are located at described patrix.
3. a kind of powder metallurgy mould with efficient discharge water structure according to claim 1 and 2, it is characterised in that, described air-flow passage is horizontal linear passage.
4. a kind of powder metallurgy mould with efficient discharge water structure according to claim 1 and 2, it is characterized in that, described water absorption channel is Vertical Channel, its one end is connected with described forming cavity top, the other end is connected with the sidewall of described air-flow passage, and makes described water absorption channel and described air-flow channel connection.
5. a kind of powder metallurgy mould with efficient discharge water structure according to claim 1 and 2, it is characterised in that, the radial dimension of the air inlet end of described air-flow passage is bigger than the radial dimension of described other positions of air-flow passage.
6. a kind of powder metallurgy mould with efficient discharge water structure according to claim 1 and 2, it is characterised in that, the radial dimension of described water absorption channel is less than the radial dimension of described air-flow passage.
7. a kind of powder metallurgy mould with efficient discharge water structure according to claim 1, it is characterized in that, it is provided with multiple described forming cavity and described water absorption channel, and multiple described water absorption channel is connected respectively between described air-flow passage and multiple described forming cavity.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520945311.5U CN205270858U (en) | 2015-11-24 | 2015-11-24 | Powder metallurgy die with high -efficient drainage structures |
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| CN201520945311.5U CN205270858U (en) | 2015-11-24 | 2015-11-24 | Powder metallurgy die with high -efficient drainage structures |
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| CN205270858U true CN205270858U (en) | 2016-06-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312562A (en) * | 2015-11-24 | 2016-02-10 | 佛山市康思达液压机械有限公司 | Powder metallurgy die of efficient drainage structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105312562A (en) * | 2015-11-24 | 2016-02-10 | 佛山市康思达液压机械有限公司 | Powder metallurgy die of efficient drainage structure |
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