CN207642141U - A kind of anti-drawing material mold for automobile pipe fitting molding convex closure - Google Patents
A kind of anti-drawing material mold for automobile pipe fitting molding convex closure Download PDFInfo
- Publication number
- CN207642141U CN207642141U CN201721778272.XU CN201721778272U CN207642141U CN 207642141 U CN207642141 U CN 207642141U CN 201721778272 U CN201721778272 U CN 201721778272U CN 207642141 U CN207642141 U CN 207642141U
- Authority
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- China
- Prior art keywords
- pipe fitting
- convex closure
- location mandril
- material returned
- plug
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000463 material Substances 0.000 title claims abstract description 121
- 238000000465 moulding Methods 0.000 title claims abstract description 25
- 229920001971 elastomer Polymers 0.000 claims abstract description 80
- 239000000956 alloy Substances 0.000 claims abstract description 44
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 44
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 7
- 238000003466 welding Methods 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 8
- 229920002635 polyurethane Polymers 0.000 claims description 7
- 239000004814 polyurethane Substances 0.000 claims description 7
- 238000004080 punching Methods 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000003292 glue Substances 0.000 claims description 5
- 238000007363 ring formation reaction Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 10
- 238000010586 diagram Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000007246 mechanism Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 235000008331 Pinus X rigitaeda Nutrition 0.000 description 1
- 235000011613 Pinus brutia Nutrition 0.000 description 1
- 241000018646 Pinus brutia Species 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
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- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
The utility model provides a kind of anti-drawing material mold for automobile pipe fitting molding convex closure, including：Location mandril, material returned rubber, screw, die sleeve, plug and alloy punch, material returned rubber is socketed in by way of interference fit in the annular groove of location mandril, the front end face of plug is close to the tail end face of location mandril, die sleeve is sleeved on by clearance fit on location mandril and end face is close to together in material returned rubber, the welding of alloy punch is provided centrally with the consistent cavity through-hole of formation of tubes convex closure in the tail portion of die sleeve, alloy punch.This is molded the anti-drawing material mold of convex closure for automobile pipe fitting, the phenomenon that pipe fitting moves together with punch die when processing pipe fitting convex closure can be effectively prevent, to realize anti-drawing material function.
Description
Technical field
The present invention relates to auto parts and components processing technique fields, and in particular to a kind of for the anti-of automobile pipe fitting molding convex closure
Draw material mold.
Background technology
In many mechanisms of automobile runs, to realize that many ventilating, lead to functions, the pipe fittings such as oil, draining, exhaust is not
The part that can or lack.And pipe fitting exists to realize its function, structure at least one end there are one the structure of convex closure, it is in need
Meeting there are 2,3,4 or more convex closures.These convex closures are essentially all to assemble too deep with limit sebific duct and prevent
Sebific duct effect of falling off because of external force.There are also be effect for fixed seal ring position.In prior art, processing
When pipe fitting convex closure, after often there is molding, pipe fitting will appear as punch die moves together, leads to that processing need to be debugged again, causes
Inefficiency has and notably breaks pipe fitting, directly destroys product.Although also someone reduces the diminution caliber margin of tolerance above two
Kind is bad, but also increases the material cost of product, can not still solve root problem.
Publication No.：The Chinese patent application of CN105728568A discloses a kind of T shapes oblique slot type convex hull forming mechanism, should
In patent application：Mold core axis is interference fitted with riser, and T-slot is equipped in mold core axis, and skewed slot push rod passes through T-slot energy with mold core axis
It is enough slidably matched, skewed slot push rod is equipped with dovetail chute, and dovetail chute coordinates with convex closure punch, one end of skewed slot push rod and cylinder
Connection, mold core axis are mounted between cope plate and lower cushion block, and cope plate and lower cushion block are further secured on riser, in cope plate
Equipped with convex closure cavity plate, riser is installed on bottom plate, and riser is connect with air cylinder fixed plate by hexagonal post, air cylinder fixed plate setting
In one end of bottom plate, cylinder is arranged in the outside of air cylinder fixed plate.Skewed slot push rod, which can be slided with mold core axis by T-slot, matches
It closes, can ensure that push rod moves back and forth smooth no interference under cylinder action；Cylinder is located at the outside portion of air cylinder fixed plate, in this way
Integral frame-type structure is just constituted, integrally-built stability and compression resistance are improved, it is ensured that during convex closure punch forming
The stability of mechanism itself provides a kind of T shapes oblique slot type convex hull forming mechanism, and stable structure is reliable, convenient to use, saves
The disposable punching press of thin-wall pipe side wall convex closure can be achieved in the mold confined space, have for die procedure and die manufacturing cost
The advantages that easy to operate, high precision machining, good product quality, it is effectively improved production efficiency, reduces energy consumption and is produced into
This.But still exist in the patent application：When processing pipe fitting convex closure, molding rear tubular member occur can together move with punch die
The phenomenon that, the phenomenon that convex closure is broken even is will appear when serious.
Invention content
In view of the deficiencies of the prior art, the present invention proposes a kind of anti-drawing material mold for automobile pipe fitting molding convex closure,
It can be effectively prevent the phenomenon that pipe fitting moves together with punch die when processing pipe fitting convex closure, to realize anti-drawing material function.
The present invention realizes the present invention, a kind of anti-drawing material mold for automobile pipe fitting molding convex closure, packet using following scheme
It includes：Location mandril, material returned rubber, screw, die sleeve, plug and alloy punch are provided with ring in the middle part of the location mandril
Shape slot, the design of material returned rubber circularize, and the material returned rubber size is identical as the annular groove in the middle part of location mandril, is matched by interference
The mode of conjunction is socketed in the annular groove of location mandril, and the front end face of plug is close to the tail end face of location mandril, and core
The axle center of stick and the axle center of location mandril are coaxial, and die sleeve is sleeved on by clearance fit on location mandril and end face is close to close
In being opened up on material returned rubber, the side wall of the die sleeve there are two symmetrically arranged notch, screw runs through in die sleeve
Die sleeve is locked on location mandril after notch, the welding of alloy punch in the tail portion of die sleeve, the alloy punch
It is provided centrally with the consistent cavity through-hole of formation of tubes convex closure, one end of remotely located plug is arranged to circular arc on the plug
Shape, one end setting of location mandril is close on the plug, and there are one threaded holes.
Preferably, the head of the location mandril processes one 90 ° of inclined-plane, and location mandril tail end face is provided centrally with
The head of through-hole through location mandril axle center, location mandril processes 90 ° of inclined-planes, is mainly locked with screw end face
In equipment, the through-hole in location mandril axle center utilizes screw locking plug for facilitating.
Preferably, symmetrical mistake proofing through-hole there are two being also set up on the lateral wall of the die sleeve.Mainly keep away
Exempt from because of accidentalia, material returned rubber, die sleeve and punch die plug three vacuum effect occur after being closed, and rubber is caused not have
There is enough elastic force that die sleeve is made to return to original state, plays the role of mistake proofing.
Preferably, the annular groove depth is shorter 5mm than material returned rubber, and mainly making material returned rubber, there are the skies of flexible deformation
Between, to have the function of making alloy punch delayed movement.
In the above-mentioned technical solutions, when pipe fitting carries out convex closure processing, material returned rubber is same with this by free state compressive deformation
When, material can form the convex closure of the same shape therewith in alloy ram type intracavitary.When the decrement of material returned rubber is just 5mm
When, convex closure completes processing, and the decrement of material returned rubber should not be too large, and no it will cause the return of material returned rubber difficulties, and
And increase the production cost of material returned rubber, while the decrement of material returned rubber is also unsuitable too small, does not otherwise have cushioning effect, makes
It obtains pipe fitting to wreck in punching course, be found in practical operation, when the decrement of material returned rubber is just 5mm, at this time
Just it can realize the suitable fast return of the material returned rubber under the action of meeting punched pipefitting buffering；And at this time material and plug it
Between there are a clamping forces, if existing at this time without the elastic force of material returned rubber, pipe fitting can together return with alloy punch, plug etc.
To original state, tube surface can be caused to pull or can not take out by hand at this time；When there are material returned rubber, rushed in alloy
Head, plug etc. return to during original state, and rubber imposes elastic force to alloy punch first, add to make alloy punch stop at
Work state, and location mandril can return to original state with plug.When rubber material returned glue restores original state, pipe fitting endoporus at this time
Can be with plug relative displacement 5mm, and just make the circular arc portion clearance fit of pipe fitting inner wall and plug at this time, therefore no longer there is folder
Clamp force, to make pipe fitting be not destroyed during molding.
Preferably, the material returned rubber uses polyurethane material, and the thickness of material returned rubber is 8mm, length 15mm.The material returned
Rubber is fixed in location mandril annular groove, and material is polyurethane, and polyurethane material is with high intensity, tear-proof, wearability
High elastic material, can effectively extend the service life of material returned rubber, and the thickness of material returned rubber is 8mm, length 15mm, this
Sample just can ensure that decrement in 5mm, and after pipe fitting completes processing, alloy punch will not return to initial shape with location mandril at once
State realizes that function is expected in anti-drawing.
Preferably, the alloy punch seamless welding is processed one and is led in the tail portion of die sleeve, the axle center of alloy punch
The processing sections in hole, alloy punch are manufactured into the cavity consistent with formation of tubes convex closure, and the purpose of such design is the work by power
With making material be squeezed into the shape consistent with mold cavity.
Preferably, the alloy punch is integrally machined using high strength steel YG6 materials, and strength steel YG6 materials have
The characteristics of high-wearing feature, high intensity, therefore its service life is also high, to processing the excellent stability of pipe fitting.
Preferably, the material returned rubber size is identical as the annular groove in the middle part of location mandril, is the interference volume set with 0.2mm
In the annular groove of location mandril, interference volume should not be too large when assembly, and no that it will cause assembly is difficult, and interference volume is not yet when assembly
It is preferably too small, it is otherwise be easy to cause loosening, is found in actual operating process, when material returned rubber with the interference volume of 0.2mm and is determined
When annular groove in the middle part of the plug of position coordinates, neither increase assembly difficulty, assembly pine will not be caused in the actual use process
It is dynamic.
Preferably, the die sleeve be sleeved on location mandril by the clearance fit of 0.02mm and end face be close to together in
Material returned rubber, it is ensured that die sleeve can be moved along location mandril axle center when punching press, but be not in big gap.
A kind of advantageous effect of anti-drawing material mold for automobile pipe fitting molding convex closure provided by the invention is：Originally it is used for
The state change that the anti-drawing material mold of automobile pipe fitting molding convex closure passes through material returned rubber so that when material returned rubber compresses, convex closure is complete
At processing, during alloy punch, plug etc. return to original state, material returned rubber imposes elastic force to alloy punch first, from
And alloy punch is made to stop at machining state, and location mandril can return to original state with plug, when rubber material returned glue restores former
When carrying out state, pipe fitting endoporus can just be consistent with the decrement of material returned rubber with plug relative displacement at this time, and just make at this time
The circular arc portion clearance fit of pipe fitting inner wall and plug, therefore no longer there is clamping force, to make pipe fitting during molding not
It is destroyed, the phenomenon that pipe fitting moves together with punch die when processing pipe fitting convex closure can be effectively prevent, to realize that work(is expected in anti-drawing
Energy.
Description of the drawings
Fig. 1 is the assembling schematic diagram of invention.
Fig. 2 is the decomposition diagram of the present invention.
Fig. 3 is the dimensional structure diagram of location mandril in the present invention.
Fig. 4 is the dimensional structure diagram of material returned rubber in the present invention.
Fig. 5 is the dimensional structure diagram of alloy punch in the present invention.
In figure：1, location mandril；2, material returned rubber；3, screw；4, die sleeve；5, plug；6, alloy punch；11, tiltedly
Face；12, annular groove；13, end face；14, through-hole；41, notch；42, mistake proofing through-hole；61, cavity through-hole.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Whole description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Ability
The every other embodiment that domain ordinary person is obtained without making creative work belongs to the protection of the present invention
Range.
Embodiment：A kind of anti-drawing material mold for automobile pipe fitting molding convex closure.
Shown in referring to Figures 1 and 2, a kind of anti-drawing material mold for automobile pipe fitting molding convex closure, including：Location mandril 1,
Material returned rubber 2, screw 3, die sleeve 4, plug 5 and alloy punch 6, wherein material returned rubber 2 are designed as annular, and effect is to make
The active force for acting on 4 positioning surface of die sleeve evenly distributes, and then ensures stabilization of the die sleeve 4 by impact force action when
Property, the size of material returned rubber 2 is identical as the annular groove 12 at 1 middle part of location mandril, is to be sleeved on location mandril with the interference volume of 0.2mm
In 1 annular groove 12 so that material returned rubber 2 can be fastened in annular groove 12 stability for then ensureing processing without falling off；
2 material of material returned rubber is polyurethane, and such material has the characteristics that high intensity, tear-proof, wearability are high, can effectively extend and move back
Expect the service life of rubber 2, the length of material returned rubber 2 is 15mm, and height is higher by than the depth of 1 intermediate annular groove 12 of location mandril
5mm, and the thickness of material returned rubber 2 need to ensure as 8mm, this can just make location mandril 1, and normally rebound returns to original state, another equipment
Output pressure need to reach 8MPa or more, this just can ensure that output power be more than material molding convex closure and 2 elastic force of material returned rubber power
The sum of, it is ensured that product quality, location mandril 1 are designed to that " umbrella " shape, head process 90 ° of inclined-planes 11, mainly use screw end
Face is locked in equipment, and the annular groove 12 at middle part is mainly used to fix material returned rubber 2, and tail end face 13 mainly allows plug 5
Front end face be closely fitted therewith, it is ensured that 5 axle center of plug and 1 axle center of location mandril are coaxial, and 1 axle center of location mandril be processed into it is logical
Hole, destination party just utilize screw locking plug 5, die sleeve 4 to be sleeved on location mandril 1 with the clearance fit of 0.02mm, end face
It is close to together in material returned rubber 2, opens up that there are two symmetrically arranged notches 41 on the side wall of the die sleeve 4, it is therefore an objective to can allows
Die sleeve 4 through die sleeve 4 and is locked on location mandril 1 by screw 3, to make screw 3 have limitation die sleeve 4
The effect of axial direction stroke prevents die sleeve 4 from falling off；It is logical that 4 outside of die sleeve also retains two symmetrically arranged mistake proofings
Hole 42 mainly avoids because of accidentalia, and material returned rubber 2, die sleeve 4 and 1 three of punch die plug occur true after being closed
Empty effect, the elastic force for causing rubber not enough make die sleeve 4 return to original state, play the role of mistake proofing；Alloy punch 6
Using high strength steel YG6, have the characteristics that high-wearing feature, high intensity, therefore its service life is also high, to the steady of processing pipe fitting
Qualitative fabulous, alloy punch 6 makes to fuse together with die sleeve 4 with the technique of seamless welding, among the axle center of alloy punch 6
There are one cavity through-hole 61, processing sections are manufactured into the cavity consistent with formation of tubes convex closure for processing, it is therefore an objective to by the effect of power,
Material is set to be squeezed into the shape consistent with mold cavity, one end of 5 remotely located plug of plug is arranged to arc-shaped, and purpose is oriented to
Inner hole of pipe is smoothly inserted in plug 5, to make tubing center and 6 cavity of alloy punch central coaxial；Plug 5 is remotely located
There are one threaded holes for one end center processing of plug, so that plug 5 is fixed with locking mode by running through location mandril 1 using screw
On the end face inside location mandril 1, it is ensured that plug 5 and location mandril 1 are coaxial, same to make plug 5 and equipment position axle center
Axis, then and so that material axle center and equipment is positioned axle center is consistent, the final stability for improving product processing.
In the present embodiment, in pipe fitting processing, material returned rubber 2 is by free state compressive deformation, at the same time, material meeting
The convex closure that the same shape therewith is formed in 6 cavity of alloy punch, when the decrement of material returned rubber 2 is just 5mm, convex closure is complete
At processing, and there are a clamping forces between material and plug 5 at this time, if existing at this time without the elastic force of material returned rubber 2, pipe fitting
Original state can be returned to together with alloy punch 6, plug 5 etc., tube surface can be caused to pull or can not take by hand at this time
Go out, when there are material returned rubber 2, during alloy punch 6, plug 5 etc. return to original state, rubber 2 first rushes alloy
First 6 impose elastic force, and to make alloy punch 6 stop at machining state, and location mandril 1 can return to original state with plug 5,
When rubber material returned glue 2 restores original state, pipe fitting endoporus can be with 5 relative displacement 5mm of plug at this time, and just makes in pipe fitting at this time
The circular arc portion clearance fit of wall and plug 5, therefore no longer there is clamping force, to make pipe fitting not broken when carrying out convex closure molding
It is bad, it can be effectively prevent the phenomenon that pipe fitting moves together with punch die when processing pipe fitting convex closure, to realize anti-drawing material function.And
And in entire pipe fitting processing, the decrement of material returned rubber 2 should not be too large, and no it will cause the returns of material returned rubber 2
Difficulty, and increase the production cost of material returned rubber 2, while the decrement of material returned rubber 2 is also unsuitable too small, does not otherwise have slow
Punching acts on so that pipe fitting wrecks in punching course, is found in practical operation, when the decrement of material returned rubber 2 is just
When 5mm, just the suitable fast return of material returned rubber 2 can be realized under the action of meeting punched pipefitting buffering at this time
With reference to shown in Fig. 3, location mandril 1 is designed to that " umbrella " shape, head process 90 ° of inclined-planes 11, mainly use screw
End face is locked in equipment, and middle part annular groove 12 is mainly used to fix material returned rubber 2, and size is basic with material returned rubber 2
Unanimously, outer diameter can mainly be enabled than 2 small 0.2mm of material returned rubber and form interference fit between material returned rubber 2 and location mandril 1,
And 12 depth of annular groove mainly so that there are the spaces of flexible deformation for material returned rubber 2, to have than 2 short 5mm of material returned rubber
Make the function of 6 delayed movement of alloy punch, the tail portion of location mandril 1 that the front end face 13 of plug 5 mainly be allowed to be closely fitted therewith, really
It is coaxial to protect 5 axle center of plug and positioning axle center, and 1 axle center of location mandril is machined with through-hole 14, purpose utilizes screw locking plug 5.
With reference to shown in Fig. 4, material returned rubber 2 is fixed in 1 annular groove of location mandril, and material is polyurethane, polyurethane material
With the high characteristic of high intensity, tear-proof, wearability, the thickness of material returned rubber 2 is 8mm, and length 15mm just can ensure that in this way
Decrement is in 5mm, and after pipe fitting completes processing, alloy punch 6 will not return to original state with location mandril 1 at once, realize anti-
Draw material function.
Referring to Figure 5, its material of alloy punch 6 uses high strength steel YG6, high strength steel YG6 to have high-wearing feature, height
The characteristics of intensity, service life is also high, and can enhance the stability of processing pipe fitting, and 6 seamless welding of alloy punch is rushing
The tail portion of die sleeve cylinder 4, and alloy punch 6 is provided centrally with the consistent cavity through-hole 61 of formation of tubes convex closure, the purpose is to
By the effect of power, material is made to be squeezed into the shape consistent with mold cavity.
The above is presently preferred embodiments of the present invention, but the present invention should not be limited to embodiment and attached drawing institute public affairs
The content opened both falls within protection of the present invention so every do not depart from the lower equivalent or modification completed of spirit disclosed in this invention
Range.
Claims (9)
1. a kind of anti-drawing material mold for automobile pipe fitting molding convex closure, it is characterised in that including：Location mandril, material returned rubber,
Screw, die sleeve, plug and alloy punch are provided with annular groove, material returned rubber design cyclization in the middle part of the location mandril
Shape, the material returned rubber size is identical as the annular groove in the middle part of location mandril, and locating core is socketed in by way of interference fit
In the annular groove of stick, the front end face of plug is close to the tail end face of location mandril, and the axle center of plug and location mandril
Axle center is coaxial, and die sleeve is sleeved on by clearance fit on location mandril and end face is close to together in material returned rubber, the punch die
It is opened up on the side wall of sleeve there are two symmetrically arranged notch, screw locks die sleeve after the notch in die sleeve
On location mandril, the welding of alloy punch in the tail portion of die sleeve, the alloy punch to be provided centrally with formation of tubes convex
Wrap consistent cavity through-hole, one end of remotely located plug is arranged to arc-shaped on the plug, is close to position on the plug
There are one threaded holes for one end setting of plug.
2. the anti-drawing material mold for automobile pipe fitting molding convex closure as described in claim 1, it is characterised in that：The locating core
The head of stick processes one 90 ° of inclined-plane, and location mandril tail end face is provided centrally with the through-hole through location mandril axle center.
3. the anti-drawing material mold for automobile pipe fitting molding convex closure as described in claim 1, it is characterised in that：The punch die set
Symmetrical mistake proofing through-hole there are two being also set up on the lateral wall of cylinder.
4. the anti-drawing material mold for automobile pipe fitting molding convex closure as described in claim 1, it is characterised in that：The annular groove
Depth is shorter 5mm than material returned rubber.
5. the anti-drawing material mold for automobile pipe fitting molding convex closure as described in claim 1, it is characterised in that：The material returned rubber
Glue uses polyurethane material, and the thickness of material returned rubber is 8mm, length 15mm.
6. the anti-drawing material mold for automobile pipe fitting molding convex closure as described in claim 1, it is characterised in that：The alloy punching
Head seamless welding processes a through-hole in the tail portion of die sleeve, the axle center of alloy punch, and the processing sections of alloy punch are manufactured into
The cavity consistent with formation of tubes convex closure.
7. the anti-drawing material mold for automobile pipe fitting molding convex closure as described in claim 1, it is characterised in that：The alloy punching
Head is integrally machined using high strength steel YG6 materials.
8. the anti-drawing material mold for automobile pipe fitting molding convex closure as described in claim 1, it is characterised in that：The material returned rubber
Glue size is identical as the annular groove in the middle part of location mandril, is sleeved in the annular groove of location mandril with the interference volume of 0.2mm.
9. the anti-drawing material mold for automobile pipe fitting molding convex closure as described in claim 1, it is characterised in that：The punch die set
Cylinder is sleeved on location mandril by the clearance fit of 0.02mm and end face is close to together in material returned rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721778272.XU CN207642141U (en) | 2017-12-19 | 2017-12-19 | A kind of anti-drawing material mold for automobile pipe fitting molding convex closure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721778272.XU CN207642141U (en) | 2017-12-19 | 2017-12-19 | A kind of anti-drawing material mold for automobile pipe fitting molding convex closure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207642141U true CN207642141U (en) | 2018-07-24 |
Family
ID=62877442
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721778272.XU Expired - Fee Related CN207642141U (en) | 2017-12-19 | 2017-12-19 | A kind of anti-drawing material mold for automobile pipe fitting molding convex closure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207642141U (en) |
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2017
- 2017-12-19 CN CN201721778272.XU patent/CN207642141U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee |