CN107755518A - Fuel tank edge-cutting and hole-punching mould - Google Patents

Fuel tank edge-cutting and hole-punching mould Download PDF

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Publication number
CN107755518A
CN107755518A CN201711297439.5A CN201711297439A CN107755518A CN 107755518 A CN107755518 A CN 107755518A CN 201711297439 A CN201711297439 A CN 201711297439A CN 107755518 A CN107755518 A CN 107755518A
Authority
CN
China
Prior art keywords
plate
template
fixed
hole
away
Prior art date
Application number
CN201711297439.5A
Other languages
Chinese (zh)
Inventor
黄海光
罗丙球
黄名兴
Original Assignee
柳州通亿汽车配件制造有限公司
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 柳州通亿汽车配件制造有限公司 filed Critical 柳州通亿汽车配件制造有限公司
Priority to CN201711297439.5A priority Critical patent/CN107755518A/en
Publication of CN107755518A publication Critical patent/CN107755518A/en

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/02Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/14Dies
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00Shaping by press-cutting; Perforating
    • B21D28/24Perforating, i.e. punching holes
    • B21D28/34Perforating tools; Die holders
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21DWORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D37/00Tools as parts of machines covered by this subclass
    • B21D37/04Movable or exchangeable mountings for tools

Abstract

The invention discloses a kind of fuel tank edge-cutting and hole-punching mould, including lower template, the side of the lower template is provided with cope plate, lower template is installed with lower mold backing plate and lower mold backing plate respectively with the side that cope plate is located remotely from each other, lower template is installed with holding pad close to the side of cope plate, side of the holding pad away from lower template is installed with binder backing plate, side of the binder backing plate away from holding pad is provided with drift backing plate, cope plate is installed with part fixed plate close to the side of lower template, side of the part fixed plate away from cope plate is uniformly installed with multiple upper mould cutter blocks, and upper mould cutter block is in contact with drift backing plate, side of the part fixed plate away from cope plate is symmetrically installed with two die case fixed plates, die case fixed plate is provided with die case.The present invention is not only easy to use, cuts through accuracy height, and is easy to people to replace with template pad, is provided conveniently for people's repair and maintenance.

Description

Fuel tank edge-cutting and hole-punching mould
Technical field
The present invention relates to technical field of mold, more particularly to a kind of fuel tank edge-cutting and hole-punching mould.
Background technology
Mould, in industrial production being molded, being blow molded, extruding, die casting or obtain the methods of forging forming, smelting, punching press The various moulds and instrument of required product.In brief, mould is the instrument for making formed article, and this instrument is by various Part is formed, and different moulds is made up of different parts.It is mainly realized by the change of institute's moulding material physical state The processing of article profile.It is known as the title of " industry is female ".
When carrying out edge-cutting and hole-punching to fuel tank, it usually needs edge-cutting and hole-punching processing is carried out using special mould, but at present There is the problem of inconvenient for use, cutting accuracy difference in the fuel tank edge-cutting and hole-punching mould that people commonly use, and template pad is not easy to change thereon.
The content of the invention
The invention aims to solve shortcoming present in prior art, and the fuel tank edge-cutting and hole-punching mould proposed.
To achieve these goals, present invention employs following technical scheme:
Fuel tank edge-cutting and hole-punching mould, including lower template, the side of the lower template are provided with cope plate, lower template and cope plate The side being located remotely from each other is installed with lower mold backing plate and lower mold backing plate respectively, and lower template is fixedly mounted close to the side of cope plate There is holding pad, side of the holding pad away from lower template is installed with binder backing plate, and side of the binder backing plate away from holding pad is set There is drift backing plate;
The cope plate is installed with part fixed plate close to the side of lower template, and part fixed plate is away from cope plate Side is uniformly installed with multiple upper mould cutter blocks, and upper mould cutter block is in contact with drift backing plate, and part fixed plate is away from upper mould The side of plate is symmetrically installed with two die case fixed plates, and die case fixed plate is provided with die case, and part fixed plate is remote Side corner location tool from cope plate is installed with support bar, and support bar is connected with binder backing plate, and corresponding two The gag lever post being fixedly mounted in part fixed plate is provided between individual support bar.
Preferably, side corner location of the binder backing plate away from holding pad is installed with limited block, and spacing Bar is slidably mounted in limited block away from part fixed plate one end, and side of the binder backing plate away from holding pad is uniformly installed with Multiple lower die cutter blocks.
Preferably, air cylinder fixed plate is installed with the part fixed plate, is bolted in air cylinder fixed plate Cylinder is installed.
Preferably, side of the cope plate away from lower template symmetrically offers two the first necks, and cope plate backing plate leans on The side of nearly cope plate is symmetrically installed with two fixed blocks, is opened up on the side inwall that two the first necks are located remotely from each other It is fluted, kelly is slidably fitted with groove, and one end of kelly is extended in the first neck, fixed cover, which is provided with, on kelly slides The first fixture block in groove, the first fixture block are provided with the second card being fixedly mounted in groove close to the side of slot opening Block, and the second fixture block is slidably located on kelly, is arranged with spring on kelly, and the both ends of spring be respectively welded at it is corresponding On first fixture block and the second fixture block.
Preferably, the side that two fixed blocks are located remotely from each other offers the wedge-shaped slot that bottom side is opening, two wedge-shaped slots The second neck is offered on the side inwall being located remotely from each other, one end that kelly is located at outside groove is run through wedge-shaped slot and is slidably installed In the second neck, one end that kelly is located in the second neck is rotatablely equipped with ball, and ball is adapted with wedge-shaped slot.
Preferably, through hole is offered on the top side inwall of the groove, push rod, the both ends of push rod are slidably fitted with through hole All extend to outside through hole, one end that push rod is located in groove is fixedly mounted on kelly.
Preferably, locating slot is offered on the bottom side inwall of the groove, the bottom side of the first fixture block is installed with positioning Block, locating piece are slidably mounted in locating slot.
Compared with prior art, the beneficial effects of the invention are as follows:
In the present invention, holding pad and part fixed plate are supported by cope plate and lower template, utilize cope plate pad and lower mould Plate pad extrudes cope plate and lower template, and trimming operation, while gag lever post and limited block are carried out using upper mould cutter block and lower die cutter block Cooperation can be such that mould cutter block is accurately cut with lower die cutter block, when the damage of cope plate pad needs to change, need to only utilize push rod to draw Dynamic kelly, makes kelly remove the second neck, you can easily removes fixed block out of first neck, so as to which cope plate pad be torn open Unload, when new cope plate pad is installed, the fixed block on cope plate pad need to be only sticked into the first neck, and press cope plate pad, Ball will roll in wedge-shaped slot and promote kelly, and kelly is mobile to bottom portion of groove and drives the first fixture block to the second fixture block side It is mobile, so as to extension spring, spring is produced bounce, when groove is concordant with the second neck, acted in the bounce of spring Under, kelly resets and sticked into the second neck, and so as to which fixed block is fixed in the first neck, the present invention is not only easy to use, Accuracy height is cut through, and is easy to people to replace with template pad, is provided conveniently for people's repair and maintenance.
Brief description of the drawings
Fig. 1 is the dimensional structure diagram of fuel tank edge-cutting and hole-punching mould proposed by the present invention;
Fig. 2 is the positive structure diagram of fuel tank edge-cutting and hole-punching mould proposed by the present invention;
Fig. 3 is that the attachment structure in fuel tank edge-cutting and hole-punching mould proposed by the present invention between cope plate and cope plate backing plate is shown It is intended to;
Fig. 4 is the structural representation of part A in Fig. 3.
In figure:1 lower template, 2 cope plates, 3 lower template backing plates, 4 cope plate backing plates, 5 holding pads, 6 holding pad backing plates, 7 punchings Hook plate, 8 part fixed plates, mould cutter block, 10 die case fixed plates, 11 die cases, 12 support bars, 13 gag lever posts, 14 first on 9 Neck, 15 fixed blocks, 16 grooves, 17 kellies, 18 first fixture blocks, 19 second fixture blocks, 20 springs.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.
Reference picture 1-4, fuel tank edge-cutting and hole-punching mould, including lower template 1, the side of lower template 1 are provided with cope plate 2, lower mould Plate 1 is installed with lower mold backing plate 3 and lower mold backing plate 4 respectively with the side that cope plate 2 is located remotely from each other, and lower template 1 is close to upper mould The side of plate 2 is installed with holding pad 5, and side of the holding pad 5 away from lower template 1 is installed with binder backing plate 6, pressure pad Side of the plate 6 away from holding pad 5 is provided with drift backing plate 7;
Cope plate 2 is installed with part fixed plate 8 close to the side of lower template 1, and part fixed plate 8 is away from cope plate 2 Side be uniformly installed with multiple upper mould cutter blocks 9, and upper mould cutter block 9 is in contact with drift backing plate 7, and part fixed plate 8 is remote Side from cope plate 2 is symmetrically installed with two die case fixed plates 10, and die case fixed plate 10 is provided with die case 11, Side corner location tool of the part fixed plate 8 away from cope plate 2 is installed with support bar 12, and support bar 12 and binder backing plate 6 are connected, and the gag lever post 13 being fixedly mounted in part fixed plate 8 are provided between corresponding two support bars 12, by upper Template 2 and lower template 1 support holding pad 5 and part fixed plate 8, using cope plate pad 4 and lower template pad 3 extrude cope plate 2 with Lower template 1, trimming operation is carried out using upper mould cutter block 9 and lower die cutter block, while gag lever post 13 coordinates with limited block and can made Mould cutter block 9 is accurately cut with lower die cutter block, when the damage of cope plate pad 4 needs to change, need to only be utilized push rod to pull kelly 17, be made Kelly 17 removes the second neck, you can easily removes fixed block 15 out of first neck 14, so as to which cope plate pad 4 be torn open Unload, when new cope plate pad 4 is installed, the fixed block 15 on cope plate pad 4 need to be only sticked into the first neck 14, and press upper mould Plate pad 4, ball will roll in wedge-shaped slot and promote kelly 17, and kelly 17 is mobile to the bottom of groove 16 and drives the first fixture block 18 Moved to the side of the second fixture block 19, so as to extension spring 20, spring 20 is produced bounce, when groove 16 is concordant with the second neck When, under the bounce effect of spring 20, kelly 17 resets and sticked into the second neck, so as to which fixed block 15 is fixed on into first In neck 14, the present invention is not only easy to use, cuts through accuracy height, and is easy to people to replace with template pad 4, is examined for people Maintenance is repaiied to provide conveniently.
In the present invention, side corner location of the binder backing plate 6 away from holding pad 5 is installed with limited block, and spacing Bar 13 is slidably mounted in limited block away from the one end of part fixed plate 8, and side of the binder backing plate 6 away from holding pad 5 is uniformly fixed Multiple lower die cutter blocks are installed, air cylinder fixed plate is installed with part fixed plate 8, is bolted in air cylinder fixed plate Cylinder is installed, side of the cope plate 2 away from lower template 1 symmetrically offers two the first necks 14, and cope plate backing plate 4 is close to upper The side of template 2 is symmetrically installed with two fixed blocks 15, is opened on the side inwall that two the first necks 14 are located remotely from each other Provided with groove 16, kelly 17 is slidably fitted with groove 16, and one end of kelly 17 is extended in the first neck 14, on kelly 17 Fixed cover is provided with the first fixture block 18 being slidably mounted in groove 16, and the first fixture block 18 is provided with solid close to the side that groove 16 is open Second fixture block 19 of the Dingan County in groove 16, and the second fixture block 19 is slidably located on kelly 17, and bullet is arranged with kelly 17 Spring 20, and the both ends of spring 20 are respectively welded on corresponding the first fixture block 18 and the second fixture block 19, two phases of fixed block 15 Mutually remote side offers the wedge-shaped slot that bottom side is opening, is offered on the side inwall that two wedge-shaped slots are located remotely from each other Second neck, one end that kelly 17 is located at outside groove 16 are run through wedge-shaped slot and are slidably mounted in the second neck, and kelly 17 is located at One end in second neck is rotatablely equipped with ball, and ball is adapted with wedge-shaped slot, is offered on the top side inwall of groove 16 Through hole, push rod is slidably fitted with through hole, the both ends of push rod are all extended to outside through hole, and one end that push rod is located in groove 16 is fixed On kelly 17, locating slot is offered on the bottom side inwall of groove 16, the bottom side of the first fixture block 18 is installed with positioning Block, locating piece are slidably mounted in locating slot, are supported holding pad 5 and part fixed plate 8 by cope plate 2 and lower template 1, are utilized Cope plate pad 4 extrudes cope plate 2 and lower template 1 with lower template pad 3, and trimming operation is carried out using upper mould cutter block 9 and lower die cutter block, Gag lever post 13 coordinates with limited block simultaneously can be such that upper mould cutter block 9 is accurately cut with lower die cutter block, be needed when cope plate pad 4 damages During replacing, it need to only utilize push rod to pull kelly 17, kelly 17 is removed the second neck, you can easily by fixed block 15 from first Removed in neck 14,, only need to be by the fixation on cope plate pad 4 when new cope plate pad 4 is installed so as to which cope plate pad 4 be dismantled Block 15 is sticked into the first neck 14, and presses cope plate pad 4, and ball will roll in wedge-shaped slot and promote kelly 17, kelly 17 To the bottom of groove 16, mobile and the first fixture block 18 of drive moves to the side of the second fixture block 19, so as to extension spring 20, makes spring 20 Bounce is produced, when groove 16 is concordant with the second neck, in the case where the bounce of spring 20 acts on, kelly 17 resets and sticks into the In two draw-in groove, so as to which fixed block 15 is fixed in the first neck 14, the present invention is not only easy to use, cuts through accuracy height, And it is easy to people to replace with template pad 4, is provided conveniently for people's repair and maintenance.
In the present invention, holding pad 5 and part fixed plate 8 are supported using cope plate 2 and lower template 1, using cope plate pad 4 with Lower template pad 3 extrudes cope plate 2 and lower template 1, and trimming operation, while gag lever post are carried out using upper mould cutter block 9 and lower die cutter block 13 can be such that upper mould cutter block 9 is accurately cut with lower die cutter block with limited block cooperation, in actual use, when cope plate pad 4 damages Need change when, only need to utilize push rod pull kelly 17, make kelly 17 remove the second neck, you can easily by fixed block 15 from Removed in first neck 14,, only need to be by cope plate pad 4 when new cope plate pad 4 is installed so as to which cope plate pad 4 be dismantled Fixed block 15 is sticked into the first neck 14, and presses cope plate pad 4, and ball will roll in wedge-shaped slot and promote kelly 17, card Bar 17 is mobile to the bottom of groove 16 and drives the first fixture block 18 to be moved to the side of the second fixture block 19, so as to extension spring 20, makes bullet Spring 20 produces bounce, and when groove 16 is concordant with the second neck, under the bounce effect of spring 20, kelly 17 resets and blocked Enter in the second neck, so as to which fixed block 15 is fixed in the first neck 14, complete the replacing of cope plate pad 4.
The foregoing is only a preferred embodiment of the present invention, but protection scope of the present invention be not limited thereto, Any one skilled in the art the invention discloses technical scope in, technique according to the invention scheme and its Inventive concept is subject to equivalent substitution or change, should all be included within the scope of the present invention.

Claims (7)

1. fuel tank edge-cutting and hole-punching mould, including lower template (1), it is characterised in that the side of the lower template (1) is provided with cope plate (2), lower template (1) is installed with lower mold backing plate (3) and lower mold backing plate (4) respectively with the side that cope plate (2) is located remotely from each other, Lower template (1) is installed with holding pad (5), side of the holding pad (5) away from lower template (1) close to the side of cope plate (2) Binder backing plate (6) is installed with, side of the binder backing plate (6) away from holding pad (5) is provided with drift backing plate (7);
The cope plate (2) is installed with part fixed plate (8) close to the side of lower template (1), and part fixed plate (8) is remote The side of cope plate (2) is uniformly installed with multiple upper mould cutter blocks (9), and upper mould cutter block (9) connects with drift backing plate (7) Touch, side of the part fixed plate (8) away from cope plate (2) is symmetrically installed with two die case fixed plates (10), die case Fixed plate (10) is provided with die case (11), and side corner location tool of the part fixed plate (8) away from cope plate (2) is fixedly mounted There is support bar (12), and support bar (12) is connected with binder backing plate (6), is provided between corresponding two support bars (12) solid Gag lever post (13) of the Dingan County in part fixed plate (8).
2. fuel tank edge-cutting and hole-punching mould according to claim 1, it is characterised in that the binder backing plate (6) is away from binder The side corner location of plate (5) is installed with limited block, and gag lever post (13) slides peace away from part fixed plate (8) one end In limited block, side of the binder backing plate (6) away from holding pad (5) is uniformly installed with multiple lower die cutter blocks.
3. fuel tank edge-cutting and hole-punching mould according to claim 1, it is characterised in that fixed on the part fixed plate (8) Air cylinder fixed plate is installed, is bolted in air cylinder fixed plate and cylinder is installed.
4. fuel tank edge-cutting and hole-punching mould according to claim 1, it is characterised in that the cope plate (2) is away from lower template (1) side symmetrically offers two the first necks (14), and cope plate backing plate (4) is symmetrically fixed close to the side of cope plate (2) Two fixed blocks (15) are installed, opened up fluted (16) on the side inwall that two the first necks (14) are located remotely from each other, it is recessed Kelly (17) is slidably fitted with groove (16), and one end of kelly (17) is extended in the first neck (14), it is solid on kelly (17) Surely the first fixture block (18) being slidably mounted in groove (16) is arranged with, the first fixture block (18) is close to the side of groove (16) opening Provided with the second fixture block (19) being fixedly mounted in groove (16), and the second fixture block (19) is slidably located on kelly (17), card Spring (20) is arranged with bar (17), and the both ends of spring (20) are respectively welded at corresponding the first fixture block (18) and the second card On block (19).
5. fuel tank edge-cutting and hole-punching mould according to claim 4, it is characterised in that what two fixed blocks (15) were located remotely from each other Side offers the wedge-shaped slot that bottom side is opening, and the second card is offered on the side inwall that two wedge-shaped slots are located remotely from each other Groove, kelly (17) are located at the one end of groove (16) outside through wedge-shaped slot and are slidably mounted in the second neck, and kelly (17) is located at One end in second neck is rotatablely equipped with ball, and ball is adapted with wedge-shaped slot.
6. fuel tank edge-cutting and hole-punching mould according to claim 4, it is characterised in that on the top side inwall of the groove (16) Through hole is offered, push rod is slidably fitted with through hole, the both ends of push rod are all extended to outside through hole, and push rod is located in groove (16) One end is fixedly mounted on kelly (17).
7. fuel tank edge-cutting and hole-punching mould according to claim 4, it is characterised in that on the bottom side inwall of the groove (16) Locating slot is offered, the bottom side of the first fixture block (18) is installed with locating piece, and locating piece is slidably mounted in locating slot.
CN201711297439.5A 2017-12-08 2017-12-08 Fuel tank edge-cutting and hole-punching mould CN107755518A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711297439.5A CN107755518A (en) 2017-12-08 2017-12-08 Fuel tank edge-cutting and hole-punching mould

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711297439.5A CN107755518A (en) 2017-12-08 2017-12-08 Fuel tank edge-cutting and hole-punching mould

Publications (1)

Publication Number Publication Date
CN107755518A true CN107755518A (en) 2018-03-06

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Application Number Title Priority Date Filing Date
CN201711297439.5A CN107755518A (en) 2017-12-08 2017-12-08 Fuel tank edge-cutting and hole-punching mould

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108309156A (en) * 2018-03-27 2018-07-24 罗厚镇 A kind of intelligent sweeping dust exhaust apparatus mounting structure
CN108637778A (en) * 2018-03-23 2018-10-12 张家港澳卓尔环保设备有限公司 A kind of lip lathe dust capture suction inlet
CN108766133A (en) * 2018-06-15 2018-11-06 严其嘉 A kind of quick demonstration instrument of vibration experiment
CN108851773A (en) * 2018-06-01 2018-11-23 山东理工大学 A kind of infant industry design sample display device
CN109177111A (en) * 2018-07-03 2019-01-11 柳州通亿汽车配件制造有限公司 A kind of plastic cement extrusion die being conveniently replaceable

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012231A (en) * 1983-07-01 1985-01-22 Toyota Motor Corp Construction for fixing punch pin of trimming press
CN102397945A (en) * 2011-10-26 2012-04-04 铜陵百瑞豪科技有限公司 Trimming and punching die
CN202639072U (en) * 2012-04-27 2013-01-02 泸州北方化学工业有限公司 Punching and trimming compound die for fuel tank
CN203592063U (en) * 2013-11-25 2014-05-14 昆山康雄精密模具有限公司 Continuously-stamping die
CN103817218A (en) * 2012-11-16 2014-05-28 无锡爱博金属制品有限公司 Punching and trimming die for automobile ABS (anti-skid brake system) supports
CN103817232A (en) * 2012-11-16 2014-05-28 无锡爱博金属制品有限公司 Punching and trimming die of guide brackets
CN203621189U (en) * 2013-11-28 2014-06-04 宁波力利模具机械有限公司 Hole punching and edge cutting device

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6012231A (en) * 1983-07-01 1985-01-22 Toyota Motor Corp Construction for fixing punch pin of trimming press
CN102397945A (en) * 2011-10-26 2012-04-04 铜陵百瑞豪科技有限公司 Trimming and punching die
CN202639072U (en) * 2012-04-27 2013-01-02 泸州北方化学工业有限公司 Punching and trimming compound die for fuel tank
CN103817218A (en) * 2012-11-16 2014-05-28 无锡爱博金属制品有限公司 Punching and trimming die for automobile ABS (anti-skid brake system) supports
CN103817232A (en) * 2012-11-16 2014-05-28 无锡爱博金属制品有限公司 Punching and trimming die of guide brackets
CN203592063U (en) * 2013-11-25 2014-05-14 昆山康雄精密模具有限公司 Continuously-stamping die
CN203621189U (en) * 2013-11-28 2014-06-04 宁波力利模具机械有限公司 Hole punching and edge cutting device

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108637778A (en) * 2018-03-23 2018-10-12 张家港澳卓尔环保设备有限公司 A kind of lip lathe dust capture suction inlet
CN108309156A (en) * 2018-03-27 2018-07-24 罗厚镇 A kind of intelligent sweeping dust exhaust apparatus mounting structure
CN108851773A (en) * 2018-06-01 2018-11-23 山东理工大学 A kind of infant industry design sample display device
CN108766133A (en) * 2018-06-15 2018-11-06 严其嘉 A kind of quick demonstration instrument of vibration experiment
CN108766133B (en) * 2018-06-15 2020-07-31 严其嘉 Vibration experiment rapid demonstration instrument
CN109177111A (en) * 2018-07-03 2019-01-11 柳州通亿汽车配件制造有限公司 A kind of plastic cement extrusion die being conveniently replaceable

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Application publication date: 20180306