CN109772919A - A kind of extrusion die - Google Patents
A kind of extrusion die Download PDFInfo
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- CN109772919A CN109772919A CN201811558592.3A CN201811558592A CN109772919A CN 109772919 A CN109772919 A CN 109772919A CN 201811558592 A CN201811558592 A CN 201811558592A CN 109772919 A CN109772919 A CN 109772919A
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- cavity plate
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Abstract
The invention belongs to stamping die technologies, and in particular to a kind of extrusion die.Including upper die component and lower mold assemblies, the lower mold assemblies include lower die holder, lower die holder is equipped with cavity plate, lower punch and liftout set are additionally provided on lower die holder, the upper end of lower punch and liftout set is in the cavity plate and surrounds the shaping mold cavity for shaping workpiece outer peripheral surface and lower hole with cavity plate, lower punch has hole section forming surface under workpiece, liftout set has the forming surface on molding lower opening hole edge, lower punch is fixedly installed on the lower die seat, on the lower die seat, lower die holder is equipped with shedding mechanism to liftout set for guiding movement installation in a pressing direction.After the completion of compression tool squeezes, push liftout set along direction of extrusion guiding movement by shedding mechanism, workpiece is pushed to squeeze out, in this way, lower punch no longer uplink, pushes workpiece to squeeze out against liftout set, compared to lower punch, liftout set is smaller with the contact area of workpiece, and more easily separated after workpiece adhesion, and knockout course is more smooth.
Description
Technical field
The invention belongs to stamping die technologies, and in particular to a kind of extrusion die.
Background technique
Aluminium alloy touch base is as the important component in high-voltage switch gear, and structure is mostly the cup type part of inner hollow, such as Fig. 1 institute
Show, including upper hole section 181 and lower hole section 182, in processing, generally bar profile is stamped to form by stamping die, such as Fig. 2
Shown, conventional extrusion dies structure, including upper die component and lower mold assemblies, upper die component include upper die holder 1, convex mould pad 2, consolidate
Fixed board 3, upper male mould 20, upper die holder 1, convex mould pad 2, fixed plate 3, upper male mould 20 set gradually and are fixed to each other from top to bottom,
Lower mold assemblies include pedestal 11, mandril 12, die socket 15, cavity plate backing plate 10, cavity plate cushion block 9, cavity plate 8, die case 16, cavity plate
Pressing sleeve 17, pressure ring 6, punch-pin locating piece 7, limited block 5, the top of pedestal 11 are mandril 12, die socket 15, cavity plate backing plate 10, recessed
Die-cushion block 9, cavity plate 8, die case 16, cavity plate pressing sleeve 17, pressure ring 6, punch-pin locating piece 7, limited block 5 are from top to bottom and fixation connects
Connect, wherein lower punch 13 be upward through cavity plate 8 and with cavity plate 8 surround for 18 outer peripheral surface of shaping workpiece and lower hole at
Pattern chamber is additionally provided with two discharge screws 19 being connected on pedestal on the pedestal 11 and unloads with what the guiding of discharge screw 19 cooperated
The lower end of flitch 4, discharge screw 19 is provided with screw thread, is adapted to the threaded hole opened up on pedestal 11, to connect with 11 screw thread of pedestal
It connects, spring 14 is equipped on the screw thread of 19 lower end of discharge screw, stripper 4 is provided with the through hole passed through for upper male mould 20.
When extrusion die work, workpiece 18 is placed in cavity plate 8, upper die component downlink, upper male mould 20 is with upper mold
The downlink of seat and move downward and pass through through hole stripper 4 inside, after moving to a certain extent, fixed plate 3 and stripper 4
Contact, meanwhile, the beginning of upper male mould 20 is contacted with workpiece 18, is squeezed workpiece 18, is concentrated mainly on the upper hole section of workpiece 18
181, meanwhile, lower punch 13 equally squeezes it in the lower part of workpiece 18, it is concentrated mainly on the lower hole section 182 of workpiece 18,
Limited block 5 is to the limit block of stripper 4 and fixed plate 3, so that upper die component and the no longer downlink of stripper 4, are squeezed to workpiece 18
It is molded, at this point, control upper die component uplink, 12 uplink of mandril, and lower punch 13 is pushed to move upward, lower punch 13 is used for will
Workpiece 18 ejects, and is finally taken out workpiece from lower punch 13 by worker.
As can be seen that since this extrusion process is hot extrusion, when 13 uplink pushing tow workpiece 18 of lower punch, due to lower punch
13 contact with the top surface of the lower hole section 182 of workpiece 18 with side, and contact area is larger, under high temperature environment, 13 pole of lower punch
Easily with lower 182 adhesion of hole section and be difficult to separate, meanwhile, when lower punch 13 by 18 pushing tow of workpiece to for worker take out position
Afterwards, due to lower punch 13 and workpiece 18 contact surface distribution in the horizontal direction and vertical direction, and worker in unloading workpiece very
It is difficult to guarantee and does not glance off in the vertical direction, if generating deflection in the vertical direction in unloading workpiece, will lead
It causes to generate lateral compression between hole and lower punch under workpiece, is not only easier to lead to adhesion, also results in the hole wall of lower hole
It deforms, influences Forming Quality.
Summary of the invention
The purpose of the present invention is to provide a kind of extrusion dies, are producing workpiece for solving extrusion die in the prior art
When the difficult problem of demoulding.
To achieve the goals above, extrusion die of the present invention adopts the following technical scheme that:
A kind of extrusion die, including upper die component and lower mold assemblies, the upper die component include upper die holder and are mounted on upper mold
Upper male mould on seat, the lower mold assemblies include lower die holder, and lower die holder is equipped with cavity plate, be additionally provided on lower die holder lower punch and
Be set in the liftout set of lower punch periphery, the upper end of lower punch and liftout set be in the cavity plate it is interior and with cavity plate surround at
The shaping mold cavity of type Workpiece periphery face and lower hole, lower punch have the lower hole section forming surface for hole section under shaping workpiece,
Liftout tackling has the forming surface for forming lower opening hole edge, and lower punch is fixedly installed on the lower die seat, and liftout is covered in extruding side
It is upwardly directed mobile installation on the lower die seat, lower die holder is equipped with the unloader for pushing liftout set to move up and squeezing out workpiece
Structure.
The beneficial effect of above-mentioned technical proposal is: after the completion of compression tool squeezes, pushing liftout set along crowded by shedding mechanism
Direction guiding movement is pressed, this makes it possible to guarantee that workpiece completes to demould in a pressing direction with cavity plate and lower punch, avoids and shows
Some molds unloading direction in demoulding is not easy to control and leads to occur between lower punch and workpiece side pressure adhesion and what is deformed ask
Topic, further, since the contact surface of liftout set and workpiece is hole hole edge under the upper surface and workpiece that liftout covers, contact area is small,
When removing workpiece from liftout set, the adhesion of the two is little, easily separated；And the face that liftout set is contacted with workpiece is flat
Face, worker just are not necessarily to guarantee centainly according to the direction of extrusion when removing workpiece from liftout set, and feeding is more convenient.
Further, guiding movement cooperates the liftout set in a pressing direction with lower punch.Due to lower punch and liftout
Set contacts in the same direction with workpiece, and liftout set makes moving for liftout set more accurate along lower punch guiding movement, keeps away
Exempt from liftout and cover to deviate in moving process.
Further, the cavity plate cushion block of support cavity plate, lower punch and liftout set are fixed on the lower die holder from die supporter
It is passed through in block and upper end is protruded into cavity plate, the block that limitation liftout set moves up stroke is equipped between cavity plate cushion block and liftout set
Structure.Stop structure can help liftout to cover to separate after ejecting workpiece with workpiece, and be arranged between cavity plate cushion block liftout set,
So that cavity plate cushion block, which can also cover liftout while eating support cavity plate, carries out block, cavity plate cushion block is taken full advantage of.
Further, the Stop structure includes the annular flange of liftout set lower end and the use that cavity plate cushion block upper end is arranged in
In gear edge in the annular cooperated with annular lug block.Using gear in annular flange and annular along block cooperation is carried out, have
Advantage easy to process.
Further, the annular flange and the interior gear edge of annular are cooperated by conical surface block.Cone match makes the two exist
When carrying out block cooperation, gear provides the power towards liftout set radially inner side to liftout set along from different directions in annular, makes it more
It is easy centering.
Further, the lower die holder is separate structure, and the lower punch, liftout set and cavity plate cushion block are different
On seperated part.Separate structure makes lower die holder when breaking down, and repairs to the seperated part of failure, and
It does not need all to dismantle lower die holder, have the advantages that easy to repair.
Further, the lower die holder includes circular base and the removable rotary table for being mounted on hole site in circular base,
Cavity plate cushion block is fixed on circular base, and lower punch is fixedly mounted on the rotary table, and the radial dimension of rotary table is greater than liftout set
Radial dimension and when removing rotary table can by liftout cover and lower punch be taken out out of cavity plate cushion block.Lower punch is arranged in rotary table
On, when dismantling liftout set and lower punch, it is only necessary to remove rotary table, liftout can be covered and lower punch takes out, so that liftout
The maintenance of set and lower punch is more convenient.
Further, the lower punch is removable is mounted on the rotary table.Releasable connection has convenient for assembly or disassembly
Advantage.
Further, the rotary table be separate structure, top disk body and lower wall disk body including releasable connection, lower punch
Lower end is equipped with outward flange, and the outward flange of lower punch is clamped and realized and be fixedly connected with rotary table by top disk body and lower part disk body.
Being fixedly connected for lower punch and rotary table is realized by the clamping of top disk body in rotary table and lower part disk body, is not needed in this way
Change the structure of lower punch, when being dismantled, lower punch is also easier to separate from rotary table.
Further, shedding mechanism includes two in circumferentially across rotary table mandril, the lower end connection of two mandrils
There is driving mechanism.By the cooperation of two mandrils and driving mechanism for ejecting workpiece after the completion of work pieces process, structure letter
Single, when needing repairing liftout set, mandril is also convenient for dismantling.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of touch base workpiece；
Fig. 2 is the structural schematic diagram of conventional extrusion dies；
Fig. 3 is the structural schematic diagram of extrusion die in the present invention；
Fig. 4 is the partial schematic diagram of extrusion die of the present invention；
Description of symbols: 1- upper die holder, 2- convex mould pad, 3- fixed plate, 4- stripper, 5- limited block, 6- pressure ring, 7- punch-pin
Locating piece, 8- cavity plate, 9- cavity plate cushion block, 10- cavity plate backing plate, 11- pedestal, 12- mandril, 13- lower punch, 14- spring, 15- are recessed
Die holder, 16- die case, 17- cavity plate pressing sleeve, 18- workpiece, the upper hole section of 181-, hole section under 182-, hole hole edge under 183-, 19- are unloaded
Material screw rod, 20- upper male mould, 21- upper die holder, 22- convex mould pad, 23- fixed plate, 24- stripper, 25- limited block, 26- pressure ring,
27- punch-pin locating piece, 28- cavity plate, 29- cavity plate cushion block, the top 30- disk body, 31- circular base, the lower part 32- disk body, 33- support
Plate, 34- mandril, 35- lower punch, 36- die socket, 37- liftout set, 38- die case, 39- cavity plate pressing sleeve, 40- workpiece, 41- are unloaded
Expect screw rod, 42- upper male mould.
Specific embodiment
Embodiments of the present invention are described further below with reference to attached drawing.
The specific embodiment of extrusion die of the present invention:
As shown in Figure 3 and Figure 4, extrusion die includes upper die component and lower mold assemblies, and the cooperation of upper die component and lower mold assemblies can
For extrusion forming workpiece 40.
Specifically, lower mold assemblies include circular base 31, circular base 31 is lower die holder, and circular base 31 has inner hole,
Inner hole is divided into the diameter holes of upper end and the large diameter hole of lower end, and diameter holes and large diameter hole are disposed with top disk body 30 and lower disc
Body 32, top disk body 30 and lower part disk body 32 collectively form the rotary table, and top disk body 30 and lower part disk body 32 pass through screw
Connection；Die socket 36 is additionally provided on circular base 31, the inside of die socket 36 is provided with cavity plate cushion block 29, cavity plate cushion block 29
Upper end for accepting cavity plate 28, the lower end of cavity plate cushion block 29 is pressed on circular base 31, in order to improve the arrangement of cavity plate 28
Stability is provided with cavity plate pressing sleeve 39 in the periphery of cavity plate 28, and the bottom end of cavity plate pressing sleeve 39 is supported on cavity plate cushion block 29, cavity plate
The periphery of pressing sleeve 39 continues to be provided with die case 38, and die case 38 is connected by screw to cavity plate pressing sleeve 39, cavity plate pressing sleeve 39
Lower end is supported on die socket 15, and is connect with 15 screw of die socket；The upper end of die case 38 also passes through screw and is fixed with pressure ring
26, further ensure the stability of cavity plate 28.
In lower part, the top of disk body 32 has been located lower punch 35, and the lower end of lower punch 35 is equipped with outward flange, lower punch 35
Outward flange is clamped and realized and to be fixedly connected with rotary table by top disk body 30 and lower part disk body 32, and the periphery of lower punch 35 is arranged with
Liftout set 37, lower punch 35 and liftout set 37 in cavity plate cushion block 29 from passing through and upper end is protruded into cavity plate 28 and surrounded with cavity plate 28
For 40 outer peripheral surface of shaping workpiece and the shaping mold cavity of lower hole, guiding movement is mounted on liftout set 37 in a pressing direction
On portion's disk body 30.The lower end of liftout set 37 is provided with the discharging that can be used for pushing liftout set 37 to move up and squeeze out workpiece 40
Mechanism, shedding mechanism include two mandrils 34, and during installation, mandril 34 sequentially passes through top disk body 30 and lower disc from top to bottom
Body 32, correspondingly, being provided with the through hole passed through for mandril 34 on top disk body 30 and lower part disk body 32, the upper end of mandril 34 is same
Sample have flange, can be used for being connected on top disk body 30, after two mandrils 34 pass through lower part disk body 32 after, by supporting plate 33 with
Two 34 screw of mandril connections, the driving mechanism that control 34 uplink of mandril is additionally provided with around supporting plate 33 (are not shown in figure
Show), after the completion of workpiece 40 squeezes, under the control of driving mechanism, shedding mechanism can push liftout set 37 to move up, in turn
Workpiece 40 is squeezed out.
For the ease of making liftout set 37 after squeezing out workpiece 40 convenient for separating with workpiece 40, cavity plate cushion block 29 and liftout set
Restricted liftout set 37 is set between 37 and moves up the Stop structure to be formed, Stop structure is made of two parts, specifically, top
The lower end of material set 37 has the annular flange of support, and hole site, which has, in the upper end of cavity plate cushion block 29 keeps off edge in annular, passes through
The block cooperation of the conical surface on gear edge can limit the stroke that liftout set 37 moves up in annular lug and annular, and liftout is avoided to cover 37
Continue uplink after squeezing out workpiece 40, is difficult to separate with workpiece 40 and causes demoulding difficult.
Since lower die holder is separate structure, lower punch 35 is located on lower part disk body 32, and liftout set 37 is located at top disk body 30
Top, top disk body 30 are located on lower part disk body 32, i.e., different seperated parts, and the radial dimension of lower part disk body 32 is greater than top
Material covers the radial dimension of 37, lower punch 35, top disk body 30, when lower punch 35, liftout set 37 need repairing, by lower part disk body
32 remove with the screw of circular base 31, can take out liftout set 37 and lower punch 35.
Upper die component includes upper die holder 21, and the lower section of upper die holder 21 passes sequentially through screw and is fixed with convex mould pad 22 and fixes
Plate 23 is embedded with upper male mould 42 in fixed plate 23, when carrying out the extrusion process of workpiece 40, upper die component downlink, and upper male mould 42
It can be contacted with workpiece 40 and it is squeezed.
Two discharge screws 41 circumferentially are additionally provided on the outside of circular base 31, the lower section of discharge screw 41 has
Screw thread is adapted to the threaded hole being arranged on circular base 31, and discharge screw 41 can be threaded on circular base 31, unloaded
The top of material screw rod 41, which is also oriented to, is equipped with stripper 24, and stripper 24 can be moved along the axial direction of discharge screw 41, when need
When wanting workpieces processing 40,24 uplink of stripper concedes space for the placement of workpiece 40, after workpiece 40 is placed, stripper
24 fall, and since the top of cavity plate 28 is disposed with limited block 25, limited block 25 can provide support to stripper 24, in workpiece 40
In entire extrusion process, stripper 24 can be also used for the fixed plate 23 of block upper die component, and be used to control upper male mould 42 to
The stroke of lower movement, certainly, stripper 24 is additionally provided with the through hole passed through for upper male mould 42.
The inside upper position of limited block 25 is also connected with punch-pin locating piece 27, and punch-pin locating piece 27 is for being set in molding
The outside of workpiece 40 avoids upper male mould 42 that the offset in horizontal direction occurs when squeezing workpiece 40.
When extrusion die of the invention works, firstly, 24 uplink of mobile discharge plate, concedes space, molding work will be needed
In the shaping mold cavity that part 40 is placed on the upper end of lower punch 35 and liftout set 37 and cavity plate 28 surrounds, stripper 24 falls, support
On limited block 25, upper die component downlink is controlled, upper male mould 42 moves down with the downlink of upper die holder 21 and passes through discharging
Through hole inside plate 24, movement to a certain extent after, fixed plate 23 is contacted with stripper 24, meanwhile, upper male mould 42 start and
Workpiece 40 contacts, and squeezes workpiece 40, is concentrated mainly on the upper hole section of workpiece 40, meanwhile, lower punch 35 is in workpiece 40
Lower part equally it is squeezed, the lower hole section of workpiece 40 is concentrated mainly on, specifically, the upper surface and end of lower punch 35
One section of side contacted with the top surface of the lower hole section of workpiece 40 and side, the upper surface of lower punch 35 and one section of side of end are
Lower hole section forming surface, with the lower hole hole of the workpiece 40 in extruding along contacting, liftout covers 37 upper end for the upper surface of liftout set 37
Face is the forming surface on lower hole hole edge, and limited block 25 makes upper die component and stripper to the block of stripper 24 and fixed plate 23
24 no longer downlinks are controlled to 40 extrusion forming of workpiece at this point, control upper die component uplink, upper male mould 42 are separated with workpiece 40 immediately
24 uplink of stripper processed concedes space, meanwhile, shedding mechanism uplink is controlled, shedding mechanism pushes liftout to cover 37 uplinks, liftout set
37 uplinks immediately.Workpiece 40, is pushed to the position taken out for worker, is taken out by worker by upward pushing tow workpiece 40.To
Liftout set 37 is moved to when cooperating with 29 block of cavity plate cushion block, 37 no longer uplink of liftout set, due in the present invention, workpiece 40
It squeezes out by liftout set 37 and completes, and eliminate the reliance on the uplink of lower punch 35, and liftout covers 37 compared to lower punch 35, with work
The contact area of part 40 is smaller, with it is more easily separated after 40 adhesion of workpiece, and liftout set 37 and the contact surface of workpiece 40 concentrate on
The lower opening hole of workpiece 40 is at namely horizontal direction, worker are easier to be drawn off, so that the knockout course of workpiece 40 is more suitable
Benefit.
In the above-described embodiments, workpiece 40 refers to touch base.
In the present embodiment, the lower end of two mandrils is connected by screw to supporting plate.In other embodiments, two mandrils
It can also directly be weldingly fixed on supporting plate.
In the present embodiment, lower punch is clamped by top disk body and lower part disk body in outward flange by itself setting and is realized
With being fixedly connected for rotary table.In other embodiments, lower punch can also be connected by screw to and be fixed on rotary table.
In the present embodiment, rotary table is separate structure, is made of top disk body and lower part disk body.In other embodiments,
Rotary table may be overall structure.
In the present embodiment, the annular lug of liftout set lower end is matched with gear edge in the annular of cavity plate cushion block upper end by the conical surface
It closes, cone match makes the two when carrying out block cooperation, and annular interior gear covers offer towards liftout to liftout along from different directions
The power for covering radially inner side, makes it easier to centering.In other embodiments, annular lug and the interior gear edge of annular are also possible to plane
Cooperation.
In the present embodiment, contact of the lower punch with workpiece concentrates on the top surface and side of hole under workpiece, with lower hole
Hole along and not in contact in other embodiments, lower punch may be designed as major diameter section and path section, wherein path section is for protruding into
The lower stomidium of workpiece, the lower stomidium hole edge for the upper surface cooperating contact workpiece that the upper surface of major diameter section can be used for covering with liftout, but
There are certain drawbacks for this embodiment, i.e., the upper surface that the upper surface of major diameter section is covered with liftout is difficult to protect in workpiece extrusion process
It holds absolute concordant, the molding on lower hole hole edge is affected, meanwhile, the upper surface of major diameter section has compressed the upper end of liftout set
The contact area in face and the lower opening hole edge of workpiece, correspondingly, the outer diameter of liftout set needs to reduce, in this way, in liftout set by work
During part ejects, it is possible to for workpiece to be pressed further by deformation along the liftout set that contact area reduces with lower opening hole.
In the present embodiment, Stop structure includes the annular lug of liftout set lower end and the use that cavity plate cushion block upper end is arranged in
In the annular gear edge cooperated with annular lug block.It in other embodiments, can be by being arranged on the inner hole of cavity plate cushion block
One annular slab to carry out block to the uplink that liftout covers.
Claims (10)
1. a kind of extrusion die, including upper die component and lower mold assemblies, the upper die component include upper die holder and are mounted on
Upper male mould on die holder, it is characterised in that: the lower mold assemblies include lower die holder, and lower die holder is equipped with cavity plate, goes back on lower die holder
Equipped with lower punch and be set in the liftout set of lower punch periphery, the upper end of lower punch and liftout set be in the cavity plate it is interior and with
Cavity plate surrounds the shaping mold cavity for shaping workpiece outer peripheral surface and lower hole, and lower punch has for hole section under shaping workpiece
Lower hole section forming surface, liftout tackling have the forming surface for forming lower opening hole edge, and lower punch is fixedly installed on the lower die seat, top
Material set in a pressing direction guiding movement installation on the lower die seat, lower die holder be equipped with push liftout set to move up and by workpiece
The shedding mechanism of extrusion.
2. extrusion die according to claim 1, it is characterised in that: the liftout set is led in a pressing direction with lower punch
Cooperate to mobile.
3. extrusion die according to claim 1 or 2, it is characterised in that: be fixed with support cavity plate on the lower die holder
Cavity plate cushion block, lower punch and liftout set are passed through from cavity plate cushion block and upper end is protruded into cavity plate, between cavity plate cushion block and liftout set
The Stop structure of stroke is moved up equipped with limitation liftout set.
4. extrusion die according to claim 3, it is characterised in that: the Stop structure includes the annular of liftout set lower end
Flange and the interior gear edge of the annular for cooperating with annular lug block that cavity plate cushion block upper end is set.
5. extrusion die according to claim 4, it is characterised in that: gear edge passes through the conical surface in the annular flange and annular
Block cooperation.
6. extrusion die according to claim 1, it is characterised in that: the lower die holder be separate structure, the lower punch,
Liftout set and cavity plate cushion block are on different seperated parts.
7. extrusion die according to claim 6, it is characterised in that: the lower die holder includes circular base and can dismount and mount
The rotary table of hole site in circular base, cavity plate cushion block are fixed on circular base, and lower punch is fixedly mounted on the rotary table,
The radial dimension of rotary table is greater than the radial dimension of liftout set and can cover liftout when removing rotary table and lower punch is from die supporter
It is taken out in block.
8. extrusion die according to claim 7, it is characterised in that: the lower punch is removable to be mounted on the rotary table.
9. extrusion die according to claim 8, it is characterised in that: the rotary table is separate structure, including releasable connection
Top disk body and lower part disk body, the lower end of lower punch is equipped with outward flange, and the outward flange of lower punch is by top disk body and lower disc
Body clamps and realizes and be fixedly connected with rotary table.
10. extrusion die according to claim 9, it is characterised in that: shedding mechanism includes two in wearing circumferentially
It crosses rotary table mandril, the lower end of two mandrils and is connected with driving mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811558592.3A CN109772919A (en) | 2018-12-19 | 2018-12-19 | A kind of extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811558592.3A CN109772919A (en) | 2018-12-19 | 2018-12-19 | A kind of extrusion die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109772919A true CN109772919A (en) | 2019-05-21 |
Family
ID=66497371
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811558592.3A Pending CN109772919A (en) | 2018-12-19 | 2018-12-19 | A kind of extrusion die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109772919A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114589211A (en) * | 2020-12-07 | 2022-06-07 | 河南平高电气股份有限公司 | Spring seat extrusion die |
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Application publication date: 20190521 |
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