CN104014639A - Deep-hole punching mould - Google Patents

Deep-hole punching mould Download PDF

Info

Publication number
CN104014639A
CN104014639A CN201410291050.XA CN201410291050A CN104014639A CN 104014639 A CN104014639 A CN 104014639A CN 201410291050 A CN201410291050 A CN 201410291050A CN 104014639 A CN104014639 A CN 104014639A
Authority
CN
China
Prior art keywords
bolster
plate
hole
mould
punching
Prior art date
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.)
Granted
Application number
CN201410291050.XA
Other languages
Chinese (zh)
Other versions
CN104014639B (en
Inventor
孙前锋
张鹏
杨加军
康世杰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Langtech (China) precision materials Limited by Share Ltd
Original Assignee
KUNSHAN LEMTECH PRECISION MACHINERY CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by KUNSHAN LEMTECH PRECISION MACHINERY CO Ltd filed Critical KUNSHAN LEMTECH PRECISION MACHINERY CO Ltd
Priority to CN201410291050.XA priority Critical patent/CN104014639B/en
Publication of CN104014639A publication Critical patent/CN104014639A/en
Application granted granted Critical
Publication of CN104014639B publication Critical patent/CN104014639B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention relates to a deep-hole punching mould. The deep-hole punching mould comprises an upper mould and a lower mould capable of moving relatively up and down. The upper mould comprises an upper mould base, an upper base plate, a connecting element, a first elastic piece, a first punch, a second punch, a clamping plate, a sub-baffle plate and a stripper plate. The lower mould comprises a lower mould base, a lower mould plate, a lower base plate, a lower mould insert, a first ejector rod, a second ejector rod and a second elastic piece. Firstly, punching but not blanking, namely semi-shearing, is carried out on a product by the first punch, and then a waste material is punched out of the product by the second punch to complete the punching process. As the punching process is divided into two steps, the service life of the first punch can be prolonged and the mould can safely and continuously work; moreover, the punching section of a punching notch is arranged to be in an inverted frustum shape, so that the waste material can be effectively prevented from jumping, and the mould is prevented from being damaged.

Description

Deep hole punching mould
Technical field
The present invention relates to manufacturing equipment field, be specifically related to a kind of deep hole punching mould.
Background technology
Deep hole punching mould is a kind of conventional manufacturing equipment, can be for punch forming of metalwork etc.But, in stamping-out process, easily cause punching pin to fracture, affect the punching pin life-span, the continuous operation of having no way.
Summary of the invention
In view of this, the present invention aims to provide and a kind ofly can extend punching pin life-span and deep hole punching mould that can normal and continuous operation.
In order to realize object of the present invention, the invention provides a kind of deep hole punching mould, comprise the upper die and lower die that can relatively move up and down; Wherein, described patrix comprises upper bolster (1), upper padding plate (2), Connection Element (3), the first elastic component (5), the first punching pin (6), the second punching pin (7), clamping plate (8), sub-baffle plate (9), stripper plate (10); Upper padding plate (2) is arranged between upper bolster (1) and clamping plate (8), sub-baffle plate (9) is fixed on clamping plate (8), stripper plate (10) is fixed on sub-baffle plate (9), upper bolster (1) offers spring eye (4), and one end of the first elastic component (5) is housed in spring eye (4) and the other end sees through upper padding plate (2), clamping plate (8) and support sub-baffle plate (9);
Described counterdie comprises that die shoe (12), lower bolster (15), lower bolster (13), counterdie enter piece (16), the first push rod (23), the second push rod (24), the second elastic component (17), lower bolster (13) is fixed on die shoe (12), lower bolster (15) offers keeps away a hole (14), lower bolster (15) is fixed on lower bolster (13), counterdie enters piece (16) and is embedded in lower bolster (15) and offers the first accepting hole and the second accepting hole, described the first accepting hole penetrates lower bolster (15), lower bolster (13) also stretches in die shoe (12), the first accepting hole that counterdie enters piece (16) partly contains the second push rod (24), lower bolster (15) partly contains the first push rod (23) with the first accepting hole of lower bolster (13), the second elastic component (17) is positioned at die shoe (12) at the bottom of being housed in described the first accepting hole, described second accepting hole one end is set to edge of a knife die cavity (28) and the other end penetrates lower bolster (15), lower bolster (13) also stretches out outside die shoe (12),
One end of Connection Element (3) is fixed in upper bolster (1), the other end of Connection Element (3) sees through upper padding plate (2) successively, clamping plate (8), sub-baffle plate (9) stretches out outside stripper plate (10) and can when described patrix and described counterdie fastening, be housed in and keep away in a hole (14), one end of the first punching pin (6) is fixed on upper padding plate (2), the other end of the first punching pin (6) sees through clamping plate (8) successively, sub-baffle plate (9) stretches out outside stripper plate (10), the second punching pin (7) is set up in parallel with the first punching pin (6) and can when described patrix and described counterdie fastening, stretches into respectively in described the first accepting hole and described the second accepting hole, one end of inner guiding post (11) is fixed on upper padding plate (2).
Preferably; described patrix also comprises inner guiding post (11); on lower bolster (15), offer guide pillar hole (20); guide pillar hole (20) penetrates lower bolster (15), lower bolster (13) and stretches out outside die shoe (12); it is upper that one end of inner guiding post (11) is fixed on upper padding plate (2), and the other end of inner guiding post (11) sees through clamping plate (8) successively, sub-baffle plate (9) stretches out outside stripper plate (10) and can when described patrix and described counterdie fastening, be housed in guide pillar hole (20).
Preferably, Connection Element (3) is contour screw or contour bolt.
Preferably, the first elastic component (5) is spring with the second elastic component (17).
Preferably, the length of the first push rod (23) is greater than the length of the second push rod (24).
Preferably, the second accepting hole section diameter that is positioned at lower bolster (15), lower bolster (13), die shoe (12) increases progressively successively.
Deep hole punching mould provided by the invention, mainly for the relatively thick product of stamping-out, and the hole of required stamping-out is less, the technical problem that causes traditional punching pin to run business big and strong, deep hole punching mould of the present invention first by the first punching pin by product stamping-out but not blanking be semishearing, and then by the second punching pin, fall waste material and go out product and complete stamping-out process, this stamping-out is divided into two steps, do so both can increase the life-span of the first punching pin and also can make mould can safety continuous operation, and the stamping-out section by stamping-out otch is set to inversed taper platform shape, can effectively prevent waste material jumping material, thereby prevent that mould from damaging.
Accompanying drawing explanation
Fig. 1 is the structural representation of the deep hole punching mould that provides of the embodiment of the present invention.
Fig. 2 is the punching press view of the deep hole punching mould that provides of the embodiment of the present invention.
The specific embodiment
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Please refer to Fig. 1 to Fig. 2, the embodiment of the present invention provides a kind of deep hole punching mould, and it comprises the upper die and lower die that can relatively move up and down.
Patrix comprises upper bolster 1, upper padding plate 2, Connection Element 3, the first elastic component 5, the first punching pin 6, the second punching pin 7, clamping plate 8, sub-baffle plate 9, stripper plate 10, inner guiding post 11.Described counterdie comprises that die shoe 12, lower bolster 15, lower bolster 13, counterdie enter piece 16, the first push rod 23, the second push rod 24, the second elastic component 17.
Upper padding plate 2 is arranged between upper bolster 1 and clamping plate 8, sub-baffle plate 9 is fixed on clamping plate 8, stripper plate 10 is fixed on sub-baffle plate 9, and one end that upper bolster 1 offers spring eye 4, the first elastic components 5 is housed in spring eye 4 and the other end sees through upper padding plate 1, clamping plate 8 and support sub-baffle plate 9.The first elastic component 5 is specially spring, can be compressive state always.
Lower bolster 13 is fixed on die shoe 12, and lower bolster 15 offers keeps away a hole 14, and lower bolster 15 is fixed on lower bolster 13.Counterdie enters piece 16 and is embedded in lower bolster 15 and offers the first accepting hole and the second accepting hole, described the first accepting hole penetrates lower bolster 15, lower bolster 13 and stretches in die shoe 12, the first accepting hole that counterdie enters piece 16 partly contains the second push rod 24, and lower bolster 15 partly contains the first push rod 23 with the first accepting hole of lower bolster 13.On lower bolster 15, offer guide pillar hole 20, guide pillar hole 20 penetrates lower bolster 15, lower bolster 13 and stretches out outside die shoe 12.
The second elastic component 17 is positioned at die shoe 12 at the bottom of being housed in described the first accepting hole, and described second accepting hole one end is set to edge of a knife die cavity 28 and the other end penetrates lower bolster 15, lower bolster 13 and stretches out outside die shoe 12.The second elastic component 17 is specially spring, as air spring, for example, can be nitrogen spring, can be compressive state always.Patrix, when free state (not punching press state), is formed with gap between clamping plate 8 and sub-baffle plate 9, and the lower end of the first punching pin 6 is positioned at clamping plate 8, and also does not protrude from the lower surface of clamping plate 8 lower end of the first punching pin 6.Specifically in the present embodiment, patrix, when free state, is formed with gap between clamping plate 4 and sub-baffle plate 5.
Edge of a knife die cavity 28 increases progressively successively with the second accepting hole section diameter that is positioned at lower bolster 15, lower bolster 13, die shoe 12, be material-dropping hole part 26,27,18,19 as waste channel, the waste material 25 forming for discharging stamping-out, diameter increases progressively successively can make waste material 25 can be easier to be discharged from.Waste channel is just in time positioned at the below of edge of a knife die cavity 28, when waste material 25 is by after stamping-out gets off from processed product, can drop in waste channel, and then be discharged from.
Edge of a knife die cavity 28 as stamping-out section is set to inversed taper platform shape, can effectively prevent waste material jumping material, thereby prevents that mould from damaging.The lateral dimension of the bottom of stamping-out section (for example radius) is less than the lateral dimension on top.Stamping-out section can be rounding taper type, also can be the platform of falling polygonal pyramid shape, when stamping-out, the waste material 25 of formation be stuck in the position of the lateral dimension minimum of stamping-out section, can not jump out from counterdie top, therefore can prevent that this deep hole punching mould is damaged when continuous stamping.
One end of Connection Element 3 is fixed in upper bolster 1, and the other end of Connection Element 3 stretches out stripper plate 10 outward through upper padding plate 2, clamping plate 8, sub-baffle plate 9 successively and can when described patrix and described counterdie fastening, be housed in and keep away in a hole 14.Connection Element 3 can be contour screw or contour bolt.
The first punching pin 6, the second punching pin 7 can pass clamping plate 8, sub-baffle plate 9, stripper plate 10 up or down, and are connected with upper padding plate 2, for rushing material.Specifically, one end of the first punching pin 6 is fixed on upper padding plate 2, the other end of the first punching pin 6 sees through clamping plate 8 successively, sub-baffle plate 9 stretches out outside stripper plate 10, and the second punching pin 7 and the first punching pin 6 are set up in parallel and can when described patrix and described counterdie fastening, stretch into respectively in described the first accepting hole and described the second accepting hole.
One end of inner guiding post 11 is fixed on upper padding plate 2, and the other end of inner guiding post 11 sees through clamping plate 8 successively, sub-baffle plate 9 stretches out outside stripper plate 10 and can when described patrix and described counterdie fastening, be housed in guide pillar hole 20.Guide pillar hole 20 is run through lower bolster 15, lower bolster 13 and is stretched out die shoe 12, and during punching press, inner guiding post 11 is first inserted in guide pillar hole 20, and patrix is played to correcting effect.
This mold work process is as follows: upper mould 1 starts to move downward under the effect of punch press, first inner guiding post 11 enters in guide pillar hole 22, upper mould 1 is carried out to correcting, then patrix 1 continues to move downward, first stripper plate 10 touches product 29 and promotes it and continue to move downward until overwhelm after lower bolster 15, and the first punching pin 6 also can continue to move downward under the effect of upper padding plate 2.
Stripper plate 10 compresses product 29 under the effect of the first spring 5, and the first punching pin 6 is in the fixing lower guiding of stripper plate 10 of passing through of clamping plate 8, under the promotion of upper padding plate 2, move downward, product 29 is carried out to stamping-out, when whole upper mould 1 is completely closed, the first punching pin 6 motions finish, and complete the stamping-out to product 29.In this course.
Due to the effect of the second push rod 24 of counterdie 1, waste material 25 does not fall, and then the patrix 1 of mould starts to move upward, and due to the effect of the first spring 5, stripper plate 10 continues product 29 to compress, and the first punching pin 6 can return in stripper plate 10.25, waste material can back into the correct position in product 29 under the effect of the second spring 17, the first push rod 23, the second push rod 24.Patrix 1 continues to move upward, and 10 of stripper plates can move upward stably under the effect of contour screw.The whole patrix 1 of mould moves to limes superiors point.The first spring 5 resets completely, and inner guiding post 11 also exits guide pillar hole A22 completely, and now this work step finishes.
Product 29 is with the travel forward distance of a work step of waste material 25.Upper mould 1 starts to move downward, first inner guiding post 11 is entered in the A22 of guide pillar hole, mould is carried out to correcting, then stripper plate 10 can be pushed down product 29 and move downward together, until overwhelm the rear stop motion of lower bolster 15, and at the effect lower stripper 10 compression products 29 of the first spring 5, then the second punching pin 7 is under the effect of upper padding plate 2, fixing through clamping plate 8, stripper plate 10 guiding, motion downward vertically.
When mould is completely closed, the second punching pin 7 motions finish, and because waste material 25 is to be stuck in product 29, so move downward product 29 when interior when the second punching pin 7, waste material 25 enters in material-dropping hole part 26 through lower die cutter shape of the mouth as one speaks chamber 28 under the promotion of the second punching pin 7.Then upper mould 1 starts to move upward, and first the second punching pin 7 returns to stripper plate 10 inside, and then, under the effect of contour screw, stripper plate 10 also steadily moves upward.Until patrix 1 moves to limit point, a punch process finishes.
In this process, waste material 25 is pushed to counterdie and enters in piece die cavity 28 under the effect of the second punching pin 7, and block waste material and make it can not jump out edge of a knife die cavity 28 to affect mould and normally work, due to the second punching pin 7 need to do long, so can make waste material 25 first motions in slug hole part 26, the main feature of this mould is because product 29 is relatively thick, and the hole of required stamping-out is less, cause the second punching pin 6 to run business big and strong, in order to make the second punching pin 6 lifes and time progressive die can normal and continuous operation, therefore this stamping-out is divided into two steps, first by product 29 stamping-outs but not blanking is not semishearing, and then by the second punching pin 7, fall waste material 25 and go out product 29 and complete stamping-out process.Do so both can increase the life-span of the first punching pin 6 and also can make mould can safety continuous operation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any modifications of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.

Claims (6)

1. a deep hole punching mould, it comprises the upper die and lower die that can relatively move up and down; Wherein, described patrix comprises upper bolster (1), upper padding plate (2), Connection Element (3), the first elastic component (5), the first punching pin (6), clamping plate (8), sub-baffle plate (9), stripper plate (10); Described counterdie comprises that die shoe (12), lower bolster (15), lower bolster (13), counterdie enter piece (16);
It is characterized in that: described patrix also comprises the second punching pin (7), described counterdie also comprises the first push rod (23), the second push rod (24), the second elastic component (17);
Upper padding plate (2) is arranged between upper bolster (1) and clamping plate (8), sub-baffle plate (9) is fixed on clamping plate (8), stripper plate (10) is fixed on sub-baffle plate (9), upper bolster (1) offers spring eye (4), and one end of the first elastic component (5) is housed in spring eye (4) and the other end sees through upper padding plate (2), clamping plate (8) and support sub-baffle plate (9);
Lower bolster (13) is fixed on die shoe (12), lower bolster (15) offers keeps away a hole (14), lower bolster (15) is fixed on lower bolster (13), counterdie enters piece (16) and is embedded in lower bolster (15) and offers the first accepting hole and the second accepting hole, described the first accepting hole penetrates lower bolster (15), lower bolster (13) also stretches in die shoe (12), the first accepting hole that counterdie enters piece (16) partly contains the second push rod (24), lower bolster (15) partly contains the first push rod (23) with the first accepting hole of lower bolster (13), the second elastic component (17) is positioned at die shoe (12) at the bottom of being housed in described the first accepting hole, described second accepting hole one end is set to edge of a knife die cavity (28) and the other end penetrates lower bolster (15), lower bolster (13) also stretches out outside die shoe (12),
One end of Connection Element (3) is fixed in upper bolster (1), the other end of Connection Element (3) sees through upper padding plate (2) successively, clamping plate (8), sub-baffle plate (9) stretches out outside stripper plate (10) and can when described patrix and described counterdie fastening, be housed in and keep away in a hole (14), one end of the first punching pin (6) is fixed on upper padding plate (2), the other end of the first punching pin (6) sees through clamping plate (8) successively, sub-baffle plate (9) stretches out outside stripper plate (10), the second punching pin (7) is set up in parallel with the first punching pin (6) and can when described patrix and described counterdie fastening, stretches into respectively in described the first accepting hole and described the second accepting hole, one end of inner guiding post (11) is fixed on upper padding plate (2).
2. deep hole punching mould according to claim 1; it is characterized in that; described patrix also comprises inner guiding post (11); on lower bolster (15), offer guide pillar hole (20); guide pillar hole (20) penetrates lower bolster (15), lower bolster (13) and stretches out outside die shoe (12); it is upper that one end of inner guiding post (11) is fixed on upper padding plate (2), and the other end of inner guiding post (11) sees through clamping plate (8) successively, sub-baffle plate (9) stretches out outside stripper plate (10) and can when described patrix and described counterdie fastening, be housed in guide pillar hole (20).
3. deep hole punching mould according to claim 1, is characterized in that, Connection Element (3) is contour screw or contour bolt.
4. deep hole punching mould according to claim 1, is characterized in that, the first elastic component (5) is spring with the second elastic component (17).
5. diel according to claim 1, is characterized in that, the length of the first push rod (23) is greater than the length of the second push rod (24).
6. diel according to claim 1, is characterized in that, the second accepting hole section diameter that is positioned at lower bolster (15), lower bolster (13), die shoe (12) increases progressively successively.
CN201410291050.XA 2014-06-25 2014-06-25 Deep hole punching mould Active CN104014639B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410291050.XA CN104014639B (en) 2014-06-25 2014-06-25 Deep hole punching mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201410291050.XA CN104014639B (en) 2014-06-25 2014-06-25 Deep hole punching mould

Publications (2)

Publication Number Publication Date
CN104014639A true CN104014639A (en) 2014-09-03
CN104014639B CN104014639B (en) 2015-12-23

Family

ID=51431797

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201410291050.XA Active CN104014639B (en) 2014-06-25 2014-06-25 Deep hole punching mould

Country Status (1)

Country Link
CN (1) CN104014639B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104646485A (en) * 2014-12-31 2015-05-27 苏州和林微纳科技有限公司 Side blanking device capable of timely discharging waste materials and processing method thereof
CN105328015A (en) * 2015-11-27 2016-02-17 徐报 Outer ring A shrapnel mould used for machining LED lamps

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008062282A (en) * 2006-09-08 2008-03-21 Aida Eng Ltd Precision punching die
CN202021267U (en) * 2010-12-14 2011-11-02 中山品高电子材料有限公司 Hardware lead-in wire frame stamping compound die
CN203409071U (en) * 2013-08-05 2014-01-29 北京毕捷电机股份有限公司 Stator and rotor sheet punching groove cutting mould
CN203418008U (en) * 2013-08-07 2014-02-05 江苏博俊工业科技股份有限公司 Stamping die for one-time forming of punching and hole flanging
CN203448537U (en) * 2013-08-16 2014-02-26 昆山联德精密机械有限公司 Die for preventing hole flanging cracking
CN204074890U (en) * 2014-06-25 2015-01-07 昆山联德精密机械有限公司 Deep hole punching mould

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008062282A (en) * 2006-09-08 2008-03-21 Aida Eng Ltd Precision punching die
CN202021267U (en) * 2010-12-14 2011-11-02 中山品高电子材料有限公司 Hardware lead-in wire frame stamping compound die
CN203409071U (en) * 2013-08-05 2014-01-29 北京毕捷电机股份有限公司 Stator and rotor sheet punching groove cutting mould
CN203418008U (en) * 2013-08-07 2014-02-05 江苏博俊工业科技股份有限公司 Stamping die for one-time forming of punching and hole flanging
CN203448537U (en) * 2013-08-16 2014-02-26 昆山联德精密机械有限公司 Die for preventing hole flanging cracking
CN204074890U (en) * 2014-06-25 2015-01-07 昆山联德精密机械有限公司 Deep hole punching mould

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104646485A (en) * 2014-12-31 2015-05-27 苏州和林微纳科技有限公司 Side blanking device capable of timely discharging waste materials and processing method thereof
CN105328015A (en) * 2015-11-27 2016-02-17 徐报 Outer ring A shrapnel mould used for machining LED lamps

Also Published As

Publication number Publication date
CN104014639B (en) 2015-12-23

Similar Documents

Publication Publication Date Title
CN204247837U (en) Guide wheel wheel rim Correction Die
CN204074890U (en) Deep hole punching mould
CN104028616A (en) Anti-jumping waste material stamping die
CN202411236U (en) Automatic deburring progressive die
CN104014663B (en) The flange die of car belt hanger continuous stamping die
CN104014639B (en) Deep hole punching mould
CN104259298B (en) The anti-tripping waste diel of a kind of high accuracy
CN206676997U (en) A kind of uncoiling blanking mould
CN205236776U (en) Punch forming mould
CN203991905U (en) Anti-tripping waste diel
CN104368694A (en) Punching and discharging compound die
CN204770220U (en) Stamping die drawing die structure
CN205763251U (en) A kind of sheet material automobile longeron punching intelligent die
CN109290508B (en) Automatic riveting device that claps nail in mould
CN203875221U (en) Hook stamping type stamping die
CN104492957B (en) A kind of spliced stamping mould
CN106825233A (en) Headlight for vehicles rack forming mould
CN105149423A (en) Orifice punching die of holder
KR101382349B1 (en) Scrap ejecting apparatus of press mold
CN105598263A (en) Floating punching die for pipe fitting
CN109127867A (en) A kind of automobile brake disc mold
CN104014661A (en) Convex point forming die for automobile safety belt retractors
CN205270554U (en) Prevent waste material spring mould structure
CN204182769U (en) A kind of diel
CN104289587B (en) A kind of anti-tripping waste stamping die

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
CP01 Change in the name or title of a patent holder

Address after: Suzhou City, Jiangsu province 215300 Zhangpu town Kunshan city Wei Road No. 128

Patentee after: KUNSHAN LIANDE PRECISION MATERIAL CO., LTD.

Address before: Suzhou City, Jiangsu province 215300 Zhangpu town Kunshan city Wei Road No. 128

Patentee before: Kunshan Lemtech Precision Machinery Co., Ltd.

C56 Change in the name or address of the patentee
CP01 Change in the name or title of a patent holder

Address after: Suzhou City, Jiangsu province 215300 Zhangpu town Kunshan city Wei Road No. 128

Patentee after: Langtech (China) precision materials Limited by Share Ltd

Address before: Suzhou City, Jiangsu province 215300 Zhangpu town Kunshan city Wei Road No. 128

Patentee before: KUNSHAN LIANDE PRECISION MATERIAL CO., LTD.

C56 Change in the name or address of the patentee