CN114800959B - Mechanical self-locking type die clamper - Google Patents
Mechanical self-locking type die clamper Download PDFInfo
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- CN114800959B CN114800959B CN202210479035.2A CN202210479035A CN114800959B CN 114800959 B CN114800959 B CN 114800959B CN 202210479035 A CN202210479035 A CN 202210479035A CN 114800959 B CN114800959 B CN 114800959B
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- wedge block
- oil
- oil cylinder
- rotor
- plane
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/20—Opening, closing or clamping
- B29C33/202—Clamping means operating on closed or nearly closed mould parts, the clamping means being independently movable of the opening or closing means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
Abstract
The invention provides a mechanical self-locking type die clamper, which comprises: the clamping device comprises a clamping device body, an oil cylinder, a pressing block, a rotating shaft, an inclined wedge block, an inclined plane rotor and a plane oil bearing, wherein the pressing block is installed on the clamping device body through the rotating shaft, the inclined wedge block is installed in the clamping device body and located below the rear portion of the pressing block, the bottom of the rear end of the pressing block is in inclined plane contact with the inclined plane of the inclined wedge block, the inclined plane rotor is installed at the bottom of the rear end of the pressing block and in inclined plane contact with the inclined plane of the inclined wedge block, the plane oil bearing is installed in the clamping device body and located below the inclined wedge block, the bottom plane of the inclined wedge block is in top surface contact with the plane oil bearing, the oil cylinder is installed at the rear end of the clamping device body, and the front end of a piston rod of the oil cylinder is connected with the rear end of the inclined wedge block. This mechanical self-locking type die clamper simple structure, design benefit through the design to die clamper structure for die clamper utensil possesses mechanical self-locking function, even oil hydraulic cylinder or oil circuit goes wrong in the use, also can not cause the pressure head not hard up.
Description
Technical Field
The invention relates to a die clamper, in particular to a mechanical self-locking die clamper.
Background
The mold is a widely used article in industry, and various molds are used in blow molding, extrusion molding, casting, stamping, etc. in industry. In the middle of the practical use of the mold, the mold needs to be clamped and fixed by means of an external clamping device, and the product forming size in the mold can be more accurate. However, due to the diversified shapes of the produced products, the styles of the molds for producing the molded products are also diversified, especially the sizes of the molds are changed, and the mold clamping devices matched with the molds need to be replaced in time to meet the requirements of clamping the templates with different specifications in production, so that the production efficiency is greatly influenced.
The mold clamping device is a device for clamping a mold, and the existing hydraulic mold clamping device usually pushes a pressure head through a hydraulic cylinder, and then the pressure head presses the mold through a lever principle. The mold clamping mode is good in universality and can adapt to templates with different thicknesses in a certain range, however, the fixture does not have a mechanical self-locking function, and once an oil pressure cylinder or an oil way goes wrong, a pressure head cannot compress the fixture, so that the production safety is seriously influenced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a mechanical self-locking die clamper which has a mechanical self-locking function and can not cause the looseness of a pressure head even if an oil hydraulic cylinder or an oil way has problems in the using process.
In order to realize the technical scheme, the invention provides a mechanical self-locking type die clamper, which comprises: the clamping device comprises a clamping device body, an oil cylinder, a pressing block, a rotating shaft, an oblique wedge block rotor and a plane oil bearing, wherein the pressing block is installed on the clamping device body through the rotating shaft, the oblique wedge block is installed in the clamping device body and located below the rear portion of the pressing block, the rear end bottom of the pressing block is in oblique surface contact with the oblique wedge block, the oblique surface rotor is installed at the bottom of the rear end of the pressing block and in oblique surface contact with the oblique wedge block, a flat surface is arranged at the bottom of the oblique surface rotor, the included angle theta between the flat surface and the oblique wedge block oblique surface vertical direction is larger than or equal to the inclination angle alpha of the oblique wedge block, the plane oil bearing is installed in the clamping device body and located below the oblique wedge block, the bottom plane of the oblique wedge block is in top surface contact with the plane oil bearing, the oil cylinder is installed at the rear end of the clamping device body, and the front end of a piston rod of the oil cylinder is connected with the rear end of the oblique wedge block.
In the technical scheme, during actual work, when the die needs to be compressed, the oil cylinder drives the piston rod to move forwards, the inclined wedge block is further pushed to move forwards on the plane oil-containing bearing, and the pressing block is pushed to rotate downwards around the rotating shaft through the inclined wedge block, so that the pressing block compresses the die. When the die needs to be loosened, the oil cylinder drives the piston rod to move backwards, so that the inclined wedge block is pushed to move forwards and backwards on the plane oil-containing bearing, and the pressing block can loosen the die under the action of self weight. When the mold is pressed, as long as the oil cylinder and the oil way are normal, the thrust to the wedge block can be continuously kept after the wedge block is moved in place by the oil cylinder, and the pressing of the mold by the pressing block can be guaranteed. Once the oil cylinder or the oil circuit has problems, even if pressure oil (or the oil circuit is disconnected) is not communicated in the oil cylinder, the force of the pressing block on the surface of the wedge block is balanced through the inclined rotor which is arranged on the pressing block and is attached to the wedge block, because the included angle theta between the bottom straight surface of the inclined rotor and the vertical direction of the inclined surface of the wedge block is larger than or equal to the inclined angle alpha of the wedge block, according to the mechanical analysis, when the included angle theta between the bottom straight surface of the rotor body and the vertical direction of the inclined surface of the wedge block is larger than or equal to the inclined angle alpha of the wedge block during installation, under the gravity of the pressing block, component force which moves backwards is not generated on the horizontal plane of the wedge block, the wedge block cannot move backwards, and the thrust of a retaining spring of the oil cylinder per se is added, so that the wedge block cannot move backwards, mechanical self-locking is realized, the pressure of the pressing block on a mold can be effectively maintained, and the pressing block cannot be loosened immediately.
Preferably, the front end of the clamp body is located below the pressing block and is provided with a front end jacking spring, and the front end jacking spring has the function that when the oil cylinder retreats, the front end jacking spring can automatically bounce the pressing block, so that the pressing block is automatically separated from the die.
Preferably, the oil cylinder comprises an oil cylinder shell, a piston rod is installed in the oil cylinder shell, the front end of the piston rod is connected with the rear end of the wedge block, the piston is sleeved at the rear end of the piston rod, an elastic force maintaining spring is arranged at the rear end of the piston, a pressurizing oil hole is arranged at the rear end of the oil cylinder shell, and a pressure relief oil hole is arranged at the front end of the oil cylinder shell. When the hydraulic oil pressure boosting device works actually, after hydraulic oil enters the oil cylinder from the pressurization oil hole, the elastic force keeps the spring and the piston to simultaneously push the piston rod to move forwards, and the forward pushing of the inclined wedge block is achieved. When hydraulic oil enters the oil cylinder from the pressure relief oil hole, the hydraulic oil pushes the piston and the elastic force maintaining spring to move in a reverse direction, at the moment, the elastic force maintaining spring is in a pressed state, and the piston rod pulls the inclined wedge block to move backwards, so that decompression of the pressing block is realized.
Preferably, the inclined plane rotor includes rotor body, rotor body's cross section sets to the straight circular of bottom surface, and rotor body's top center is provided with the spacer pin, the rear end bottom of briquetting be provided with rotor body and spacer pin assorted rotor mounting groove and spacing cotter way, rotor body and spacer pin correspond respectively to be installed in rotor mounting groove and spacing cotter way, wherein rotor body's the straight face in bottom and the inclined plane contact of tapered wedge, and rotor body bottom straight face and tapered wedge inclined plane vertical direction's contained angle theta is greater than or equal to the inclination alpha of tapered wedge during the installation, according to mechanical analysis, when rotor body bottom straight face and tapered wedge inclined plane vertical direction's contained angle theta was greater than or equal to the inclination alpha of tapered wedge during the installation, under briquetting self gravity, can not produce the component of backward movement on the tapered wedge horizontal plane, the tapered wedge can not backward move to realize mechanical auto-lock.
The mechanical self-locking die clamper provided by the invention has the beneficial effects that: this mechanical self-locking type die clamper simple structure, design benefit through the design to die clamper structure for die clamper utensil possesses mechanical self-locking function, even oil hydraulic cylinder or oil circuit goes wrong in the use, also can not cause the pressure head not hard up. During actual work, when a mould needs to be compressed, the oil cylinder drives the piston rod to move forwards, the inclined wedge block is further pushed to move forwards on the plane oil-containing bearing, and the pressing block is pushed to rotate downwards around the rotating shaft through the inclined wedge block, so that the pressing block compresses the mould. When the die needs to be loosened, the oil cylinder drives the piston rod to move backwards, so that the inclined wedge block is pushed to move forwards and backwards on the plane oil-containing bearing, and the pressing block can loosen the die under the action of self weight. When the die is pressed, as long as the oil cylinder and the oil way are normal, the oil cylinder moves the wedge block in place, the thrust on the wedge block can be continuously kept, and the pressing block can be guaranteed to be pressed on the die. Once the oil cylinder or the oil circuit has problems, even if pressure oil (or the oil circuit is disconnected) is not communicated in the oil cylinder, the force of the pressing block on the surface of the wedge block is balanced through the inclined rotor which is arranged on the pressing block and is attached to the wedge block, because the included angle theta between the bottom straight surface of the inclined rotor and the vertical direction of the inclined surface of the wedge block is larger than or equal to the inclined angle alpha of the wedge block, according to the mechanical analysis, when the included angle theta between the bottom straight surface of the rotor body and the vertical direction of the inclined surface of the wedge block is larger than or equal to the inclined angle alpha of the wedge block during installation, under the gravity of the pressing block, component force which moves backwards is not generated on the horizontal plane of the wedge block, the wedge block cannot move backwards, and the thrust of a retaining spring of the oil cylinder per se is added, so that the wedge block cannot move backwards, mechanical self-locking is realized, the pressure of the pressing block on a mold can be effectively maintained, and the pressing block cannot be loosened immediately.
Drawings
FIG. 1 is a top view of the present invention.
Fig. 2 is a rear view of the present invention.
Fig. 3 is a cross-sectional view of the present invention.
Fig. 4 is a schematic structural view of the pressing die of the present invention.
FIG. 5 is a schematic view of the mold released in accordance with the present invention.
FIG. 6 is a schematic structural view of the wedge block of the present invention in butt joint with a bevel rotor.
FIG. 7 is a schematic view of a bevel rotor according to the present invention.
FIG. 8 is a force analysis diagram of the present invention in which a bevel rotor is subjected to a pressure of a pressure block.
In the figure: 1. a clamper body; 2. an oil cylinder; 21. a cylinder housing; 22. a piston rod; 23. a piston; 24. an elastic force holding spring; 25. a pressurizing oil hole; 26. a pressure relief oil hole; 3. briquetting; 4. a rotating shaft; 5. a tapered wedge; 6. a bevel rotor; 61. a rotor body; 62. a limit pin; 63. a bottom flat surface; 7. a planar oil-retaining bearing; 8. the front end jacks up the spring; 9. and (5) molding.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by a person skilled in the art without making any inventive step are within the scope of protection of the present invention.
Example (b): a mechanical self-locking type die clamper.
Referring to fig. 1 to 5, a mechanical self-locking type die clamper includes: the clamping device comprises a clamping device body 1, an oil cylinder 2, a pressing block 3, a rotating shaft 4, a tapered wedge block 5, an inclined plane rotor 6, a plane oil-retaining bearing 7 and a front end jacking spring 8, wherein the pressing block 3 is installed on the clamping device body 1 through the rotating shaft 4, the tapered wedge block 5 is installed in the clamping device body 1 and is located below the rear part of the pressing block 3, the bottom of the rear end of the pressing block 3 is in contact with the inclined plane of the tapered wedge block 5, the inclined plane rotor 6 is installed at the bottom of the rear end of the pressing block 3 and is in contact with the inclined plane of the tapered wedge block 5, and the inclined plane rotor 6 is used for balancing force of the pressing block 3 on the surface of the tapered wedge block 5, so that the tapered wedge block 5 can be self-locked under the action of self gravity even if no back thrust exists.
Referring specifically to fig. 6 to 8, the inclined plane rotor 6 includes a rotor body 61, the cross section of the rotor body 61 is set to be circular with a straight bottom surface, a limit pin 62 is arranged at the top center of the rotor body 61, a rotor mounting groove and a limit pin groove matched with the rotor body 61 and the limit pin 62 are arranged at the bottom of the rear end of the pressing block 3, the rotor body 61 and the limit pin 62 are respectively and correspondingly mounted in the rotor mounting groove and the limit pin groove, wherein a straight bottom surface 63 of the rotor body 61 contacts with an inclined plane of the wedge 5, and an included angle θ between a straight bottom surface 63 of the rotor body 61 and the inclined plane of the wedge 5 in the vertical direction is greater than or equal to an inclined angle α of the wedge during mounting. Fig. 8 shows a force analysis diagram, in which the inclination angle of the tapered wedge 5 is α, the downward acting force of the pressure block 3 is Q, the total reaction force of the tapered wedge 5 to the pressure block 3 is R, the included angle between the inclined rotor 6 and the tapered wedge 5 in the vertical direction is θ, θ is a friction angle, and P is a thrust force for moving the tapered wedge 5 in the horizontal direction. As calculated by the force diagram, P = Q × tan (α - θ), and when α = θ, P =0 does not move the wedge 5 in the horizontal direction, and remains in the original state. Therefore, the wedge 5 is self-locking when the inclination angle α of the wedge 5 is equal to or smaller than the friction angle θ. The friction coefficient μ = tan (θ), and the friction angle θ = arctan (μ), and in a static state, a static friction coefficient should be used, which is larger than a dynamic friction coefficient. The coefficient of friction μmay be obtained by testing or by reference to previously empirical data.
The plane oil-containing bearing 7 is installed in the clamper body 1 and located below the inclined wedge block 5, the bottom plane of the inclined wedge block 5 is in contact with the top surface of the plane oil-containing bearing 7, the plane oil-containing bearing 7 is used for reducing friction force when the inclined wedge block 5 moves, so that the inclined wedge block 5 moves more smoothly, the oil cylinder 2 is installed at the rear end of the clamper body 1, the front end of a piston rod 22 of the oil cylinder 2 is connected with the rear end of the inclined wedge block 5, the oil cylinder 2 comprises an oil cylinder shell 21, a piston rod 22 is installed in the oil cylinder shell 21, the front end of the piston rod 22 is connected with the rear end of the inclined wedge block 5, the piston 23 is sleeved at the rear end of the piston rod 22, an elastic force retaining spring 24 is arranged at the rear end of the piston 23, a pressurizing oil hole 25 is arranged at the rear end of the oil cylinder shell 21, and a pressure relief oil hole 26 is arranged at the front end of the oil cylinder shell 21. In actual operation, when hydraulic oil enters the oil cylinder 2 from the pressurizing oil hole 25, the elastic force holding spring 24 and the piston 23 simultaneously push the piston rod 22 to move forward, so as to push the wedge 5 forward. When hydraulic oil enters the oil cylinder 2 from the pressure relief oil hole 26, the hydraulic oil reversely pushes the piston 23 and the elastic force retaining spring 24 to move, at the moment, the elastic force retaining spring 24 is in a pressed state, and the piston rod 22 pulls the tapered wedge 5 to move backwards, so that decompression of the pressing block 3 is realized.
The front end of the clamp body 1 is arranged below the pressing block 3 and is provided with a front end jacking spring 8, and the front end jacking spring 8 has the effect that when the oil cylinder 2 retreats, the pressing block 3 can be automatically bounced by the front end jacking spring 8, so that the pressing block 3 is automatically separated from the die.
This mechanical self-locking type die clamper simple structure, design benefit through the design to die clamper structure for die clamper possesses mechanical self-locking function, even oil hydraulic cylinder or oil circuit go wrong in the use, can not cause the pressure head not hard up yet. In actual operation, when the die 9 needs to be pressed, after hydraulic oil enters the oil cylinder 2 from the pressurizing oil hole 25, the elastic force holding spring 24 and the piston 23 simultaneously push the piston rod 22 to move forward, further push the inclined wedge 5 to move forward on the plane oil-containing bearing 7, and push the pressing block 3 to rotate downward around the rotating shaft 4 through the inclined wedge 5, so that the pressing block 3 presses the die 9 (see fig. 4). When the die 9 needs to be loosened, after hydraulic oil enters the oil cylinder 2 from the pressure relief oil hole 26, the hydraulic oil reversely pushes the piston 23 and the elastic force maintaining spring 24 to move, at the moment, the elastic force maintaining spring 24 is in a pressed state, the piston rod 22 pulls the inclined wedge block 5 to move backwards, so that decompression of the pressing block 3 is realized, and meanwhile, the pressing block 3 can be automatically bounced by the front end jacking spring 8, so that automatic separation of the pressing block 3 and the die is realized. When the mold 9 is pressed, as long as the oil cylinder 2 and the oil path are normal, the oil cylinder 2 moves the wedge 5 in place, and then the thrust on the wedge 5 is continuously kept, so that the pressing block 3 can be guaranteed to keep pressing the mold 9. Once the oil cylinder 2 or the oil path has a problem, even if pressure oil (or the oil path is disconnected) is not communicated in the oil cylinder 2, the force of the pressing block 3 on the surface of the wedge block 5 is balanced through the inclined rotor 6 which is arranged on the pressing block 3 and attached to the wedge block 3, and because the included angle theta between the bottom straight surface of the inclined rotor 6 and the vertical direction of the inclined surface of the wedge block 5 is larger than or equal to the inclined angle alpha of the wedge block, according to the mechanical analysis, when the included angle theta between the bottom straight surface 63 of the rotor body 61 and the vertical direction of the inclined surface of the wedge block 5 is larger than or equal to the inclined angle alpha of the wedge block 5 during installation, under the self-gravity of the pressing block 3, a component force moving backwards cannot be generated on the horizontal plane of the wedge block 5, the wedge block 5 cannot move backwards, and the thrust force of the retaining force spring 24 of the oil cylinder 2 can be added, so that the wedge block 5 cannot move backwards, mechanical self-locking can be realized, the pressure of the pressing block 3 on the mold 9 can be effectively maintained, and the pressing block 3 cannot be immediately released.
The above description is only for the preferred embodiment of the present invention, but the present invention should not be limited to the embodiment and the disclosure of the drawings, and therefore, all equivalent or modifications that do not depart from the spirit of the present invention are intended to fall within the scope of the present invention.
Claims (4)
1. The utility model provides a machinery self-locking type die clamper which characterized in that includes: the clamping device comprises a clamping device body, an oil cylinder, a pressing block, a rotating shaft, a wedge block, an inclined plane rotor and a plane oil-containing bearing, wherein the pressing block is installed on the clamping device body through the rotating shaft, the wedge block is installed in the clamping device body and located below the rear portion of the pressing block, the bottom of the rear end of the pressing block is in contact with the inclined plane of the wedge block, a flat surface is arranged at the bottom of the inclined plane rotor and is in contact with the inclined plane of the wedge block, the included angle theta between the flat surface and the inclined plane vertical direction of the wedge block is larger than or equal to the inclined angle alpha of the wedge block, the plane oil-containing bearing is installed in the clamping device body and located below the wedge block, the bottom plane of the wedge block is in contact with the top surface of the plane oil-containing bearing, the oil cylinder is installed at the rear end of the clamping device body, the front end of a piston rod of the oil cylinder is connected with the rear end of the wedge block, the inclined plane rotor comprises a rotor body, the cross section of the rotor body is arranged to be circular with the flat bottom surface, and a limit pin is arranged at the top center of the rotor body.
2. The mechanical self-locking type die clamper according to claim 1, wherein: the front end of the clamp body is positioned below the pressing block and is provided with a front end jacking spring.
3. The mechanical self-locking type die clamper according to claim 1, wherein: the oil cylinder comprises an oil cylinder shell, a piston rod is installed in the oil cylinder shell, the front end of the piston rod is connected with the rear end of the inclined wedge block, the piston is sleeved at the rear end of the piston rod, an elastic force retaining spring is arranged at the rear end of the piston, a pressurizing oil hole is formed in the rear end of the oil cylinder shell, and a pressure relief oil hole is formed in the front end of the oil cylinder shell.
4. The mechanical self-locking type die clamper according to claim 1, wherein: the rear end bottom of briquetting is provided with rotor mounting groove and spacing cotter way with rotor body and spacer pin assorted, and rotor body and spacer pin correspond respectively to be installed in rotor mounting groove and spacing cotter way, wherein the flat and flat face in bottom of rotor body contacts with the inclined plane of tapered wedge, and the flat and flat face in bottom of rotor body and the contained angle theta of tapered wedge inclined plane vertical direction are greater than or equal to the inclination alpha of tapered wedge when just installing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210479035.2A CN114800959B (en) | 2022-05-05 | 2022-05-05 | Mechanical self-locking type die clamper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210479035.2A CN114800959B (en) | 2022-05-05 | 2022-05-05 | Mechanical self-locking type die clamper |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114800959A CN114800959A (en) | 2022-07-29 |
| CN114800959B true CN114800959B (en) | 2022-12-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210479035.2A Active CN114800959B (en) | 2022-05-05 | 2022-05-05 | Mechanical self-locking type die clamper |
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| CN (1) | CN114800959B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504046A (en) * | 1983-05-10 | 1985-03-12 | Keitaro Yonezawa | Retracting clamp |
| JPH03221224A (en) * | 1989-11-20 | 1991-09-30 | S R Eng Kk | Wedge system clamping device |
| CN201020867Y (en) * | 2007-01-11 | 2008-02-13 | 南通华东油压机械制造有限公司 | Compressing apparatus of hydraulic press |
| CN204450955U (en) * | 2015-02-10 | 2015-07-08 | 华茂机械(肇庆)有限公司 | A kind of die clamper |
| CN205167321U (en) * | 2015-12-02 | 2016-04-20 | 苏州格莱富机械科技有限公司 | Clamp plate formula die clamper |
| CN107521043A (en) * | 2017-08-08 | 2017-12-29 | 苏州格莱富机械科技有限公司 | A kind of mechanical lock clamp mold |
-
2022
- 2022-05-05 CN CN202210479035.2A patent/CN114800959B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4504046A (en) * | 1983-05-10 | 1985-03-12 | Keitaro Yonezawa | Retracting clamp |
| JPH03221224A (en) * | 1989-11-20 | 1991-09-30 | S R Eng Kk | Wedge system clamping device |
| CN201020867Y (en) * | 2007-01-11 | 2008-02-13 | 南通华东油压机械制造有限公司 | Compressing apparatus of hydraulic press |
| CN204450955U (en) * | 2015-02-10 | 2015-07-08 | 华茂机械(肇庆)有限公司 | A kind of die clamper |
| CN205167321U (en) * | 2015-12-02 | 2016-04-20 | 苏州格莱富机械科技有限公司 | Clamp plate formula die clamper |
| CN107521043A (en) * | 2017-08-08 | 2017-12-29 | 苏州格莱富机械科技有限公司 | A kind of mechanical lock clamp mold |
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| Publication number | Publication date |
|---|---|
| CN114800959A (en) | 2022-07-29 |
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Address after: 526238 Linjiang Industrial Zone, hi tech Zone, Guangdong, Zhaoqing Patentee after: Guangdong Huamao Precision Manufacturing Co.,Ltd. Address before: 526238 Linjiang Industrial Zone, hi tech Zone, Guangdong, Zhaoqing Patentee before: HUAMAO MACHINERY (ZHAOQING) Co.,Ltd. |