CN108145061A - Thin type chain pearl moulding process - Google Patents
Thin type chain pearl moulding process Download PDFInfo
- Publication number
- CN108145061A CN108145061A CN201711085158.3A CN201711085158A CN108145061A CN 108145061 A CN108145061 A CN 108145061A CN 201711085158 A CN201711085158 A CN 201711085158A CN 108145061 A CN108145061 A CN 108145061A
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- China
- Prior art keywords
- pipe
- forming tank
- groove
- molding
- chain pearl
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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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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21L—MAKING METAL CHAINS
- B21L11/00—Making chains or chain links of special shape
- B21L11/12—Forming bead chains
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
Abstract
A kind of thin type chain pearl moulding process, for the outer casing forming of chain pearl, includes the following steps：(1), gold, the forming of (2), trombone slide are melted；(3), seamless welding forms hollow pipe；(4), trombone slide is molded；(5), preliminary molding, hollow pipe is fixed on clamping device, it is molded on the first mold by clamping device gripping hollow pipe, form cydariform pipe, (6), secondary mould pressing, by step (5), treated that cydariform pipe is fixed on clamping device, is molded on the second mold by clamping device gripping hollow pipe；(7), it is surface-treated, polishes spherical pipe surface, spherical pipe surface is made to become smooth；(8), Pipe Cutting：The present invention completes the first one-step forming of bulb tube by being molded for the first time, in secondary mould pressing, forms type groove by the difference that spherical radius is gradually reduced and is processed, and then complete the molding of thin type chain pearl, in the case where ensureing overall volume, the weight of chain pearl is effectively reduced, reduces the price of product.
Description
Technical field
The present invention relates to a kind of gold ornament moulding process more particularly to thin type chain pearl moulding process.
Background technology
Modern life increased quality, so other than selecting suitable proper clothes in daily life, in order to more
Highlight taste that personal characteristic can wear different ornaments to show itself and with other people as distinguishing, and ornament
Type is various, is more commonly used, and includes the ornaments such as ring, necklace, earrings, bracelet.By the collocation of ornament
To promote personal style and whole visual sense of beauty.
Existing ornament chain pearl is developed towards more and more thinner direction, and manufacturer is by increasing chain pearl overall volume, subtracting
The mode of production of the thickness of chainlet pearl not only effectively improves the visual effect of chain pearl, moreover, reducing the weight of chain pearl, and then drops
The cost of low chain pearl increases selling point, however, existing ornament chain pearl is developed towards more and more thinner direction, but by technique
Influence, the thickness of product still cannot do too thin, and otherwise for product in bonding processes, product will appear the situation of fracture,
Product rejection is in turn resulted in, increases the manufacture cost of product.
Invention content
Based on this, it is necessary to for deficiency of the prior art, provide thin type chain pearl moulding process.
A kind of thin type chain pearl moulding process for the outer casing forming of chain pearl, is set, chain inside the chain pearl in hollow structure
The both ends of pearl, which are equipped with, is connected with inside through-hole, and the chain pearl is pearl shape, and the outer diameter size of chain pearl is from middle part to both ends
It gradually tapers up, correspondingly, the inner space of the chain pearl is equally gradually tapered up from middle part to both ends, the middle part of the chain pearl housing
Outer diameter size is M, and the thickness of chain pearl housing is N, and the marginal portion of through-hole and the distance of outer diameter in the middle part of chain pearl are A, thin type chain
Pearl moulding process includes the following steps：
(1), gold is melted, block-like gold is melted, when melting gold, adds in tungsten metal material, being allowed to gold becomes hard gold；
(2), trombone slide shapes, and forms hollow tube；
(3), the tube body is seamlessly connected by seamless welding, forms hollow pipe；
(4), trombone slide is molded, and hollow pipe is put, trombone slide is carried out in drawbench, make hollow pipe Uniform Tension, after being completely stretched,
The thickness of hollow tube wall is thinning, and the thickness N values of hollow tube wall are more than M, and the difference of N and M is more than 1mm；
(5), preliminary molding, hollow pipe is fixed on clamping device, and hollow pipe is gripped in the first mold by clamping device
On be molded, form cydariform pipe, the outer surface of the cydariform pipe forms several bulbous protrusions being connected with each other, and cydariform pipe
On bulbous protrusion shape size it is consistent；
First mold includes cope plate, upper cores, lower template, lower mode and four-drive device, the upper cores
Cope plate bottom is installed in, the lower mode is installed in lower template, and upper cores and lower mode are holding up direction in being oppositely arranged,
The four-drive device drives molding or die sinking between upper cores, lower mode；The bottom surface of the upper cores is equipped with to be distributed side by side
Forming tank, the orientation of the forming tank of upper cores is consistent with the direction fed during molding, and the cell wall of the forming tank is in ball
Face is set, and the spherical radius of forming tank is R, and the R values are more than M values, and it is recessed that the mode between adjacent twenty percent type groove is equipped with one
Slot, the groove depth of groove is L；The top surface of the lower mode is again provided with the forming tank being distributed side by side, the forming tank of the upper cores
It is consistent with the forming tank on lower mode in structure, after molding, molding space is surrounded between the forming tank of upper cores and lower mode,
Circular through hole is encircled between the groove of the groove of upper cores and lower mode；The bottom surface both sides of the upper cores are additionally provided with guide groove,
The guide groove is interconnected with forming tank；
During processing, clamping device gripping hollow pipe, which is stretched into the first mold, to be molded, and four-drive device drives upper mold
Mode die sinking, molding under Renhe, after often completing molding, mold-break operations, clamping device drives hollow pipe feeding further along, and
The angle [alpha] of hollow pipe is rotated, wherein α values are less than 30 °, and the forming tank quantity in upper cores is that the product of T, α and T are more than 360 °,
Each spherical protuberances on cydariform pipe are processed successively by forming tank；
(6), secondary mould pressing, by step (5), treated that cydariform pipe is fixed on clamping device, is gripped by clamping device empty
Heart pipe is molded on the second mold；
Second mold includes male template, male die core, caster, mother module core and the 5th driving device, the male die core
Male template bottom is installed in, the mother module core is installed on caster, and male die core and mother module core are holding up direction in being oppositely arranged,
5th driving device drives molding or die sinking between male die core, mother module core；The bottom surface of the male die core is equipped with to be distributed side by side
Forming tank, the orientation of the forming tank of male die core is consistent with the direction fed during molding, and the bottom surface of the male die core is also set
There is guide groove, the guide groove is interconnected with forming tank；
The spherical setting of cell wall of the forming tank, the forming tank are divided into three groups, and the cell wall of the forming tank is spherical
Setting, wherein, the spherical radius of first group of forming tank cell wall is R, and the spherical radius of second group of forming tank cell wall is r, the
The spherical radius of three composition type groove cell walls is M, is sequentially increased in the size of R, r, M value, the mould between adjacent twenty percent type groove
Benevolence portion is equipped with a groove, wherein, the groove groove depth between third composition type groove is L, and second forms the groove groove depth between type groove
For N, the first groove groove depth formed between type groove is A, and wherein L, N, A value is sequentially increased；After molding, male die core and mother module core
Molding space is surrounded between forming tank, circular through hole is encircled between the groove of male die core and the groove of mother module core；
During processing, clamping device gripping hollow pipe, which is stretched into the second mold, to be molded, and the 5th driving device drives male model
Renhe mother module core die sinking, molding, after often completing molding, mold-break operations, clamping device drives the feeding further along of cydariform pipe, and
The angle [alpha] of hollow pipe is rotated, wherein α values are not more than 60 °, are more than in upper cores per the product that composing type slot number amount is Y, α and T
360 °, each spherical protuberances on cydariform pipe are processed successively by forming tank；
(7), it is surface-treated, polishes spherical pipe surface, spherical pipe surface is made to become smooth；
(8), Pipe Cutting carries out Pipe Cutting to bulb tube, cuts off the round protrusion after the composition type groove processing of the second module three；：
In conclusion the advantageous effect of thin type chain pearl moulding process of the present invention is：In molding, it is carried out in two steps, by
The first one-step forming of bulb tube is completed in first molding, and in secondary mould pressing, the forming tank on the second mold is divided into several groups, and along
Feedstock direction, the forming tank of difference group are gradually reduced spherical radius, and gradually increase the groove depth of groove, complete the ball being tentatively molded
Shape pipe form type groove and is processed in secondary mould pressing by the difference that spherical radius is gradually reduced, so completion thin type chain pearl into
Type in the case where ensureing overall volume, effectively reduces the weight of chain pearl, reduces the price of product, meet the consumer spending heart
Reason increases selling point, and then improves the economic benefit of enterprise.
Description of the drawings
The front view of chain pearl that Fig. 1 is processed by a kind of thin type chain pearl moulding process of invention.
Fig. 2 is the structure diagram of the upper cores of the second mold used by a kind of thin type chain pearl moulding process of invention.
Structure diagrams of the Fig. 3 to invent a kind of thin type chain pearl moulding process molding cydariform pipe in step (5).
Specific embodiment
In order to which the object, technical solution and advantage for making invention are more clearly understood, with reference to the accompanying drawings and embodiments, to hair
It is bright to be further elaborated.It should be appreciated that specific embodiment described herein is not used to limit only to explain invention
Fixed invention.
As shown in Figure 1, the present invention provides a kind of thin type chain pearl moulding process, for the outer casing forming of chain pearl 10, the chain
10 inside of pearl is set in hollow structure, and the both ends of chain pearl 10, which are equipped with, is connected with inside through-hole 11, and the chain pearl 10 is pearl
Shape, the outer diameter size of chain pearl 10 are gradually tapered up from middle part to both ends, and correspondingly, the inner space of the chain pearl 10 is equally in
Portion is gradually tapered up to both ends, and the middle part outer diameter size of 10 housing of chain pearl is M, and the thickness of 10 housing of chain pearl is N, through-hole 11
Marginal portion and the distance of 10 middle part outer diameter of chain pearl are A, and thin type chain pearl moulding process includes the following steps：
(1), gold is melted, block-like gold is melted, when melting gold, adds in tungsten metal material, being allowed to gold becomes hard gold, adds in
During tungsten metal material, added according in per kilogram gold in the ratio of 1~2 gram of tungsten metal material；
(2), preliminarily forming by step (1) treated gold bullion tabletting, forms gold plaque, by the gold plaque after mold
Bend to the apertured hollow tube of tool；
(3), the tube body is seamlessly connected by seamless welding, forms hollow pipe；
(4), trombone slide is molded, and hollow pipe is put, trombone slide is carried out in drawbench, make hollow pipe Uniform Tension, after being completely stretched,
The thickness of hollow tube wall is thinning, and the thickness N values of hollow tube wall are more than M, and the difference of N and M is more than 1mm,；
(5), preliminary molding, hollow pipe is fixed on clamping device, and hollow pipe is gripped in the first mold by clamping device
On be molded, form cydariform pipe 20, the outer surface of the cydariform pipe 20 forms several bulbous protrusions 21 being connected with each other, and
The shape size of bulbous protrusion 21 on cydariform pipe 20 is consistent；The clamping device includes rack, first driving means, is installed in
The second driving device in first driving means is installed in the third driving device of the second driving device and is installed in third driving
Fixture on device, the first driving means drive the second driving device, third driving device and fixture holding up direction fortune
Dynamic, second driving device drives third driving device and fixture to move in the horizontal direction, and the fixture is used to clamp cydariform
The initial end of pipe 20, the third driving device drive fixture rotation, adjust cydariform 20 profile angle on the first mold of pipe；
First mold includes cope plate, upper cores, lower template, lower mode and four-drive device, the upper cores
Cope plate bottom is installed in, the lower mode is installed in lower template, and upper cores and lower mode are holding up direction in being oppositely arranged,
The four-drive device drives molding or die sinking between upper cores, lower mode.The bottom surface of the upper cores is equipped with to be distributed side by side
Forming tank, the orientation of the forming tank of upper cores is consistent with the direction fed during molding, and the cell wall of the forming tank is in ball
Face is set, and the spherical radius of forming tank is R, and the R values are more than M values, and it is recessed that the mode between adjacent twenty percent type groove is equipped with one
Slot, the groove depth of groove is L.The top surface of the lower mode is again provided with the forming tank being distributed side by side, the forming tank of the upper cores
It is consistent with the forming tank on lower mode in structure, after molding, molding space is surrounded between the forming tank of upper cores and lower mode,
Circular through hole 11 is encircled between the groove of the groove of upper cores and lower mode.The bottom surface of the upper cores is additionally provided with for spherical shape
The guide groove that pipe imports, the guide groove are interconnected with forming tank；
During processing, clamping device gripping cydariform pipe 20, which is stretched into the first mold, to be molded, in four-drive device drive
Mode and the die sinking of lower mode, molding, after often completing molding, mold-break operations, clamping device drives hollow pipe feeding further along,
And the angle [alpha] of hollow pipe is rotated, wherein α values are less than 30 °, and the forming tank quantity in upper cores is that the product of T, α and T are more than
360 °, each spherical protuberances 21 on cydariform pipe 20 are processed successively by forming tank；
(6), secondary mould pressing, by step (5), treated that cydariform pipe is fixed on clamping device, is gripped by clamping device empty
Heart pipe is molded on the second mold, the clamping device equally include rack, first driving means, the second driving device,
Third driving device and fixture, the third driving device drive fixture rotation, molding of the adjustment cydariform pipe on the second mold
Angle；
Second mold includes male template, male die core 30, caster, mother module core and the 5th driving device, the male model
Benevolence 30 is installed in male template bottom, and the mother module core is installed on caster, and male die core 30 and mother module core are holding up direction in phase
To setting, the 5th driving device drives molding or die sinking between male die core, mother module core.The bottom surface of the male die core 30 is equipped with
The forming tank 40 being distributed side by side, the orientation of the forming tank 40 of male die core 30 is consistent with the direction fed during molding, the public affairs
The bottom surface of mode 30 is additionally provided with guide groove 50, and the guide groove 50 is interconnected with forming tank 40.
The spherical setting of cell wall of the forming tank 40, the forming tank 40 are divided for three groups (41,42,43), the molding
The spherical setting of cell wall of slot 40, wherein, the spherical radius of first group of 41 cell wall of forming tank is R, second group of forming tank 42
The spherical radius of cell wall is r, and the spherical radius of third composition 43 cell wall of type groove is M, is sequentially increased in the size of R, r, M value
(in this implementation, be divided into 0.1mm), the mode portion between adjacent twenty percent type groove 40 are equipped with a groove 60, wherein, third composition
60 groove depth of groove between type groove 31 is L, and 60 groove depth of groove between the second composition type groove 42 is N, the first composition type groove 33 it
Between 60 groove depth of groove for A, wherein L, N, A value are sequentially increased (be divided into 0.15mm).After molding, male die core 30 and mother module core
Molding space is surrounded between forming tank, circular through hole is encircled between the groove 60 and the groove of mother module core of male die core 30.
During processing, clamping device gripping hollow pipe, which is stretched into the second mold, to be molded, and the 5th driving device drives male model
Renhe mother module core die sinking, molding, after often completing molding, mold-break operations, clamping device drives the feeding further along of cydariform pipe, and
The angle [alpha] of hollow pipe is rotated, wherein α values are not more than 60 °, are more than in upper cores per the product that composing type slot number amount is Y, α and T
360 °, each spherical protuberances on cydariform pipe are processed successively by forming tank.
(7), it is surface-treated, polishes spherical pipe surface, spherical pipe surface is made to become smooth；
(8), Pipe Cutting carries out Pipe Cutting to bulb tube, cuts off the round protrusion after the composition type groove processing of the second module three；
In conclusion the advantageous effect of thin type chain pearl moulding process of the present invention is：In molding, it is carried out in two steps, by
The first one-step forming of bulb tube is completed in first molding, and in secondary mould pressing, the forming tank on the second mold is divided into several groups, and along
Feedstock direction, the forming tank of difference group are gradually reduced spherical radius, and gradually increase the groove depth of groove, complete the ball being tentatively molded
Shape pipe forms type groove in secondary mould pressing, by spherical radius difference is gradually reduced and is processed, so complete thin type chain pearl 10 into
Type in the case where ensureing overall volume, effectively reduces the weight of chain pearl 10, reduces the price of product, meet consumer spending
Psychology increases selling point, and then improves the economic benefit of enterprise.
Embodiment described above only expresses the several embodiments of invention, and description is more specific and detailed, but not
It can therefore be construed as limiting the scope of the patent.It should be pointed out that for those of ordinary skill in the art,
Under the premise of inventive concept is not departed from, various modifications and improvements can be made, these belong to the protection domain of invention.Cause
This, the protection domain of patent of invention should be determined by the appended claims.
Claims (4)
1. a kind of thin type chain pearl moulding process for the outer casing forming of chain pearl, is set, chain pearl inside the chain pearl in hollow structure
Both ends be equipped with and be connected with inside through-hole, the chain pearl is pearl shape, the outer diameter size of chain pearl from middle part to both ends by
Contracting is tapered, correspondingly, the inner space of the chain pearl is equally gradually tapered up from middle part to both ends, outside the middle part of the chain pearl housing
Diameter size is M, and the thickness of chain pearl housing is N, and the marginal portion of through-hole is A with the distance of outer diameter in the middle part of chain pearl, and feature exists
In thin type chain pearl moulding process includes the following steps：
(1), gold is melted, block-like gold is melted, when melting gold, adds in tungsten metal material, being allowed to gold becomes hard gold；
(2), trombone slide shapes, and forms hollow tube；
(3), the tube body is seamlessly connected by seamless welding, forms hollow pipe；
(4), trombone slide is molded, and hollow pipe is put, trombone slide is carried out in drawbench, make hollow pipe Uniform Tension, hollow after being completely stretched
The thickness of tube wall is thinning, and the thickness N values of hollow tube wall are more than M, and the difference of N and M is more than 1mm；
(5), preliminary molding, hollow pipe is fixed on clamping device, enterprising in the first mold by clamping device gripping hollow pipe
Row molding, forms cydariform pipe, and the outer surface of the cydariform pipe forms several bulbous protrusions being connected with each other, and on cydariform pipe
The shape size of bulbous protrusion is consistent；
First mold includes cope plate, upper cores, lower template, lower mode and four-drive device, the upper cores installing
In cope plate bottom, the lower mode is installed in lower template, and upper cores and lower mode are holding up direction in being oppositely arranged, described
Four-drive device drives molding or die sinking between upper cores, lower mode；The bottom surface of the upper cores be equipped be distributed side by side into
Type groove, the orientation of the forming tank of upper cores is consistent with the direction fed during molding, and the cell wall of the forming tank is spherical sets
It puts, the spherical radius of forming tank is R, and the R values are more than M values, and the mode between adjacent twenty percent type groove is equipped with a groove, recessed
The groove depth of slot is L；The top surface of the lower mode is again provided with the forming tank being distributed side by side, and the forming tank of the upper cores is in structure
It is upper consistent with the forming tank on lower mode, after molding, molding space, upper cores are surrounded between the forming tank of upper cores and lower mode
Groove and lower mode groove between be encircled into circular through hole；The bottom surface both sides of the upper cores are additionally provided with guide groove, described to lead
Slot is interconnected with forming tank；
During processing, clamping device gripping hollow pipe is stretched into the first mold and is molded, four-drive device drive upper cores and
Lower mode die sinking, molding, after often completing molding, mold-break operations, clamping device drives hollow pipe feeding further along, and rotates
The angle [alpha] of hollow pipe, wherein α values are less than 30 °, and the forming tank quantity in upper cores is that the product of T, α and T are more than 360 °, cydariform
Each spherical protuberances on pipe are processed successively by forming tank；
(6), secondary mould pressing, by step (5), treated that cydariform pipe is fixed on clamping device, and hollow pipe is gripped by clamping device
It is molded on the second mold；
Second mold includes male template, male die core, caster, mother module core and the 5th driving device, the male die core installing
In male template bottom, the mother module core is installed on caster, and male die core and mother module core are holding up direction in being oppositely arranged, described
5th driving device drives molding or die sinking between male die core, mother module core；The bottom surface of the male die core be equipped be distributed side by side into
Type groove, the orientation of the forming tank of male die core is consistent with the direction fed during molding, and the bottom surface of the male die core is additionally provided with leads
Slot, the guide groove are interconnected with forming tank；
The spherical setting of cell wall of the forming tank, the forming tank are divided into three groups, the spherical setting of cell wall of the forming tank,
Wherein, the spherical radius of first group of forming tank cell wall is R, and the spherical radius of second group of forming tank cell wall is r, and third forms
The spherical radius of type groove cell wall is M, is sequentially increased in the size of R, r, M value, the mode portion between adjacent twenty percent type groove is set
There is a groove, wherein, the groove groove depth between third composition type groove is L, and the second groove groove depth for forming between type groove is N, the
Groove groove depth between one composition type groove is A, and wherein L, N, A value is sequentially increased；After molding, the forming tank of male die core and mother module core
Between surround molding space, be encircled into circular through hole between the groove of male die core and the groove of mother module core；
During processing, clamping device gripping hollow pipe is stretched into the second mold and is molded, the 5th driving device drive male die core and
Mother module core die sinking, molding, after often completing molding, mold-break operations, clamping device drives the feeding further along of cydariform pipe, and rotates
The angle [alpha] of hollow pipe, wherein α values are not more than 60 °, are more than 360 ° per the product that composing type slot number amount is Y, α and T in upper cores,
Each spherical protuberances on cydariform pipe are processed successively by forming tank；
(7), it is surface-treated, polishes spherical pipe surface, spherical pipe surface is made to become smooth；
(8), Pipe Cutting carries out Pipe Cutting to bulb tube, cuts off the round protrusion after the composition type groove processing of the second module three.
2. a kind of thin type chain pearl moulding process as described in claim 1, it is characterised in that：In step (1), tungsten metal is added in
During material, added according in per kilogram gold in the ratio of 1~2 gram of tungsten metal material.
3. a kind of thin type chain pearl moulding process as described in claim 1, it is characterised in that：In step (2), by step (1)
Gold bullion tabletting that treated forms gold plaque, and the gold plaque is bent to the apertured hollow tube of tool after mold.
4. a kind of thin type chain pearl moulding process as described in claim 1, it is characterised in that：The clamping device include rack,
First driving means, the second driving device being installed in first driving means, the third driving for being installed in the second driving device
Device and the fixture being installed in third driving device, the first driving means drive the second driving device, third driving dress
It puts and fixture drives third driving device and fixture to move in the horizontal direction holding up direction movement, second driving device,
The fixture is used to clamp the initial end of cydariform pipe, and the third driving device drives fixture rotation, adjusts the molding of cydariform pipe
Angle.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711085158.3A CN108145061B (en) | 2017-11-07 | 2017-11-07 | Thin type chain pearl moulding process |
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| CN108145061B CN108145061B (en) | 2019-04-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671470A (en) * | 2019-09-29 | 2020-01-10 | 梁恩 | Transmission chain |
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|---|---|---|---|---|
| US1087876A (en) * | 1913-05-31 | 1914-02-17 | Bryant Electric Co | Machine for making bead chains. |
| US1548677A (en) * | 1921-03-02 | 1925-08-04 | Bead Chain Mfg Co | Manufacture of bead chains |
| CN1748893A (en) * | 2004-09-15 | 2006-03-22 | 朱国光 | Method for producing slide fastener tooth |
| CN101491384A (en) * | 2008-01-21 | 2009-07-29 | 株式会社并木制作所 | Ball chain and method of manufacturing the same |
| WO2009150314A2 (en) * | 2008-05-16 | 2009-12-17 | ONERA (Office National d'Etudes et de Recherches Aérospatiales) | Method for preparing a cellular material based on hollow metal beads |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110671470A (en) * | 2019-09-29 | 2020-01-10 | 梁恩 | Transmission chain |
| CN110671470B (en) * | 2019-09-29 | 2021-03-05 | 梁恩 | Transmission chain |
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| CN108145061B (en) | 2019-04-02 |
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