CN107601829B - 3D glass forming die structure - Google Patents
3D glass forming die structure Download PDFInfo
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- CN107601829B CN107601829B CN201711053885.1A CN201711053885A CN107601829B CN 107601829 B CN107601829 B CN 107601829B CN 201711053885 A CN201711053885 A CN 201711053885A CN 107601829 B CN107601829 B CN 107601829B
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Abstract
The invention discloses a 3D glass forming die structure, which belongs to the field of dies and comprises a male die and a female die which are arranged up and down, wherein 3D glass is clamped between the male die and the female die, two grooves which are parallel to the side edges of the 3D glass and are positioned at two sides of the 3D glass are arranged on the male die, clamping corners corresponding to the two grooves are arranged on the female die, and limiting steps with the vertical distance of 0.03-0.05 mm from the highest point on the left/right side surfaces of the 3D glass are arranged in the grooves. The invention has the beneficial effects that: the limiting steps are arranged in the grooves, so that when the glass is molded, the limiting steps can limit two side edges of the glass, and the glass is prevented from swinging left and right; but because glass heating has the inflation, the step plane with 3D glass left/right side upper peak vertical direction distance is 0.03 ~ 0.05mm, can prevent that the glass edge from appearing the impression or causing the piece.
Description
Technical Field
The invention relates to the field of molds, in particular to a 3D glass forming mold structure.
Background
Along with the rising of 3D curved surface screen and the 5G era of communication, 3D curved surface glass (preceding back lid) will more be used to the smart mobile phone, and the lid behind the existing metal will be abandoned completely to the 5G era, and the adoption can not produce shielding glass material to the signal.
In the 3D curved surface glass forming process, the formed glass profile is very important control precision for the 3D curved surface, once the glass is eccentric in the forming process, the glass profile deviates to one side, the precision cannot be guaranteed, and all the control on the eccentricity of the 3D curved surface glass is particularly important; at present, the research on the eccentric control of 3D curved glass is very few, for example, the utility model patent with the publication number of CN2601253Y discloses a microcrystalline glass substrate blank forming device for a magnetic disk, which comprises a high-pressure press, an upper die connected with a punch and a bottom die corresponding to the upper die, wherein three clamping feet which are uniformly distributed and made of elastic materials are arranged on the side surface of the upper die, and the clamping feet are tightly matched with the side outer edge surface of the bottom die. The method can control the eccentricity within 0.1-0.3 mm, but the method adopts the function of the clamping pin made of elastic material, does not consider the thermal expansion condition of glass, and cannot be used in precision products with very high requirements on the eccentricity.
For another example, publication No. CN204434470U discloses a forming mold for producing curved glass sheets, comprising a central plate and at least one peripheral curved lath; the forming die is made of graphite and comprises a lower die, a middle frame, an upper die and a die core, wherein the lower die comprises a first curved surface die cavity on the die core, the middle frame is used for limiting a glass plate, the upper die comprises a pressing block through hole and is matched with the middle frame, the die core comprises a second curved surface die cavity which can be matched with the first curved surface die cavity in a concave-convex mode and can be arranged on the pressing block through hole, and the locking block is used for fixing the upper die, the middle frame, the glass plate and the lower die. Although the middle frames are arranged on two sides of the product, the middle frames are only limited to the left and right position control of the plane plate, the problem of thermal expansion is not considered, and the middle frames cannot be used in precision products with very high requirements on the eccentric amount.
Disclosure of Invention
In order to solve the problems of large eccentricity, poor precision control, high defective rate of products and the like of products produced by a 3D glass forming die in the prior art, the invention provides a 3D glass forming die structure which comprises a male die and a female die which are arranged up and down, wherein 3D glass is clamped between the male die and the female die, two grooves which are parallel to the side edges of the 3D glass and are positioned at two sides of the 3D glass are arranged on the male die, clamping angles corresponding to the two grooves are arranged on the female die, and limiting steps with the vertical direction distance of 0.03-0.05 mm from the highest point on the left side surface/right side surface of the 3D glass are arranged in the grooves.
The limiting steps are arranged in the grooves, so that when the glass is molded, the limiting steps can limit two side edges of the glass, and the glass is prevented from swinging left and right; but because glass heating has the inflation, the step plane with 3D glass left/right side upper peak vertical direction distance is 0.03 ~ 0.05mm, can prevent that the glass edge from appearing the impression or causing the piece.
Furthermore, a platform parallel to the limiting step is arranged at the position corresponding to the limiting step in the clamping angle.
Further, the distance between the platform and the lowest point on the left/right side surface of the 3D glass in the vertical direction is 0-0.1 mm.
Further, the platform with the holding surface smooth connection of the shaping below that is used for supporting glass panel on the die, its smooth connection face can be the arc curved surface, the platform can design as far as possible low, specifically with the minimum is apart from vertical direction distance on the 3D glass left/right flank and is 0 ~ 0.1mm, can make the specific relatively broad inflation space in glass both sides limit like this under the prerequisite of guaranteeing the product shaping extension, avoids causing the extrusion injury to glass both sides limit.
Furthermore, two lock edges parallel to the grooves are arranged on two side edges of the male die, and more than one lock groove used for fixing the male die and the female die is arranged on the lock edges.
Furthermore, a lock angle is arranged at the position, corresponding to the lock groove, on the female die, and the outer contour of the lock angle is superposed with the inner contour of the lock groove.
And the design of the locking groove and the locking angle can fix the male die and the female die, so that the male die and the female die are prevented from being displaced in the forming process, and the quality of a 3D glass product is prevented from being influenced.
Further, the main body materials of the female die and the male die are formed by filling a stainless steel fiber framework and stainless steel powder.
Further, the stainless steel fiber framework is a three-dimensional woven fabric which is formed by weaving stainless steel filament fibers according to the shape of a male die or a female die by a weaving process.
By adopting the stainless steel fiber framework and utilizing the deformation resistance of the stability of the integral structure of the three-dimensional woven fabric, the stability and the mechanical property of the contact plane of the mold and a glass product can be improved, particularly in a heated stress state, the surface deformation of the mold is prevented, the smoothness of the glass surface is improved, and the warping degree of a glass main body is reduced.
Further, the diameter of the stainless steel filament fiber is 0.01-0.10 μm, the average diameter of the stainless steel powder is 0.005-0.015 μm, and the surface roughness of the female die/male die is 0.002-0.003 μm.
Further, the weight ratio of the stainless steel filament fibers to the stainless steel powder is 1: (0.5-2).
Further, the stainless steel powder is poured on the stainless steel fiber framework in a melting and spraying mode, and the male die/the female die are obtained through a forming process.
Furthermore, a heating plate is arranged at the position, 4-8 cm away from one side adjacent to the 3D glass, of the convex die and the concave die, and the heating plate is parallel to the plane where the 3D glass is located.
Further, one side, adjacent to the 3D glass, of the male die and the female die is coated with a heat conduction film, the heat conduction film is made of metal heat conduction materials, the specific formula of the metal heat conduction materials is 40-70 wt% of iron oxide, 10-20 wt% of copper powder, 0.5-4 wt% of silver powder, 5-10 wt% of zinc, and the balance of magnesium and impurities, wherein the content of the impurities is not more than 0.5%.
Further, the diameter of particles in the heat conducting film is 1-10 microns.
Furthermore, the roughness of the heat conduction film is 0.01-0.02 mu m.
Furthermore, more than one layer of electromagnetic induction coils are laid in the heating plate, and the electromagnetic induction coils heat the heat conducting films on the male die and the female die, so that the temperature of the heat conducting films is higher than the softening and melting temperature of the glass, and the molten glass is prevented from being adhered to the heat conducting films when the die cavity is filled with the molten glass, and the filling of the die cavity is prevented from being influenced.
Further, three layers of electromagnetic induction coils are laid inside the heating plate, the distance between every two adjacent layers of electromagnetic induction coils is 1-2 cm, and the currents of the electromagnetic induction coils are 3A, 5A and 10A in sequence from inside to outside.
Adopt three-layer electromagnetic induction coil to heat the heat conduction membrane, can improve the homogeneity to the heat conduction membrane heating, owing to electromagnetic induction coil's heating characteristics has successfully realized the accurate heating to the heat conduction membrane moreover, has improved the heating efficiency of mould.
Compared with the prior art, the invention has the beneficial effects that:
(1) the limiting steps are arranged in the grooves, so that when the glass is molded, the limiting steps can limit two side edges of the glass, and the glass is prevented from swinging left and right; but the glass expands when heated, the vertical distance between the step plane and the highest point on the left/right side surface of the 3D glass is 0.03-0.05 mm, and the glass edge can be prevented from being imprinted or causing fragments;
(2) the platform is smoothly connected with a supporting surface below the concave die for supporting the glass plate during forming, the smooth connecting surface of the platform can be an arc-shaped curved surface, the platform can be designed to be a little lower as possible, and particularly, the distance between the platform and the lowest point on the left side surface and the right side surface of the 3D glass in the vertical direction is 0-0.1 mm, so that the two side edges of the glass can be particularly wide expansion spaces on the premise of ensuring the product forming extension, and the two side edges of the glass are prevented from being extruded and damaged;
(3) the locking groove and the locking angle are designed, so that the male die and the female die can be fixed, and the male die and the female die are prevented from being displaced in the forming process to influence the quality of a 3D glass product;
(4) by adopting the stainless steel fiber framework and utilizing the stability and the deformation resistance of the integral structure of the three-dimensional woven fabric, the stability and the mechanical property of the contact plane of the mold and a glass product can be improved, particularly in a heated stress state, the surface deformation of the mold is prevented, the smoothness of the glass surface is improved, and the warping degree of a glass main body is reduced.
Drawings
FIG. 1 is a perspective view of a preferred male mold of the present invention;
FIG. 2 is a perspective view of a preferred female mold of the present invention;
FIG. 3 is a perspective view of a preferred 3D curved glass of the present invention;
FIG. 4 is a cross-sectional view of a preferred mold of the present invention;
fig. 5 is an enlarged view of the mark a in fig. 4.
The meanings of the marks in the figure are as follows:
1. a male die; 11. a groove; 12. locking edges; 13. locking the groove; 14. a limiting step; 2. a female die; 21. clamping a corner; 22. locking the corner; 23. a platform; 3. 3D glass; 31. a body portion; 32. a curved surface portion; 4. heating plates; 41. an electromagnetic induction coil.
Detailed Description
The present invention will be described in further detail with reference to the following drawings and examples. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
As shown in fig. 1-4, the 3D glass forming mold structure includes a male mold 1 and a female mold 2 arranged up and down, the 3D glass 3 is clamped between the male mold 1 and the female mold 2, two grooves 11 parallel to the side edges of the 3D glass 3 and located on two sides of the 3D glass 3 are arranged on the male mold 1, two clamping corners 21 corresponding to the grooves 11 are arranged on the female mold 2, and the 3D glass 3 includes a main body part 31 and curved surface parts 32 arranged on two sides of the main body part.
Two locking edges 12 parallel to the groove 11 are arranged on two side edges of the male die 1, and more than one locking groove 13 for fixing the male die 1 and the female die 2 is arranged on the locking edges 12.
A lock angle 22 is arranged at a position on the female die 2 corresponding to the lock groove 13, and the outer contour of the lock angle 22 is overlapped with the inner contour of the lock groove 13.
Easily understand, design locked groove and lock angle, can with the terrace die with the die is fixed, prevents that displacement from appearing in terrace die and die at the shaping in-process, influences the quality of 3D glass product.
As a preferable embodiment, a heating plate 4 is arranged at a position 4-8 cm away from one side of the convex die 1, the concave die 2 and the 3D glass 3, and the heating plate 4 is parallel to the plane of the 3D glass 3.
The side, adjacent to the 3D glass 3, of the male die 1, the female die 2 is coated with a heat conduction film, the heat conduction film is made of metal heat conduction materials, the specific formula of the metal heat conduction materials is 40-70 wt% of iron oxide, 10-20 wt% of copper powder, 0.5-4 wt% of silver powder, 5-10 wt% of zinc, and the balance of magnesium and impurities, wherein the content of the impurities is not more than 0.5%. The surface roughness of the heat-conducting film is 0.01-0.02 mu m.
The metal heat conduction material obtained by adopting the formula has smooth surface and high heat conductivity, and when the 3D glass is demoulded, the surface of the 3D glass cannot be adhered to the surface of a mould, so that the demoulding and the product performance are influenced.
More than one layer of electromagnetic induction coils 41 are laid inside the heating plate 4, the electromagnetic induction coils 41 heat the heat conducting films on the male die and the female die, so that the temperature of the heat conducting films is higher than the softening and melting temperature of glass, and the molten glass is prevented from being adhered to the heat conducting films when the die cavity is filled with the molten glass, and the filling of the die cavity is prevented from being influenced.
In a preferred embodiment, the main materials of the female die 2 and the male die 1 are stainless steel fiber frameworks and stainless steel powder filling.
The stainless steel fiber framework is a three-dimensional woven fabric which is formed by weaving stainless steel filament fibers according to the shape of a male die or a female die by a weaving process.
Surprisingly, the stainless steel fiber framework is adopted, and the stability and the mechanical property of the contact plane of the mold and a glass product can be improved by utilizing the deformation resistance of the stability of the integral structure of the three-dimensional woven fabric, particularly under the heated and stressed state, the deformation of the surface of the mold is prevented, the smoothness of the surface of the glass is improved, and the warping degree of the glass main body is reduced.
The diameter of the stainless steel filament fiber is 0.01-0.10 mu m, the average diameter of the stainless steel powder is 0.005-0.015 mu m, and the surface roughness of the female die/male die is 0.02-0.03 mu m.
The weight ratio of the stainless steel filament fibers to the stainless steel powder is 1: (0.5-2).
And pouring stainless steel powder on the stainless steel fiber framework in a melting and spraying mode, and obtaining the male die/the female die through a molding process.
As a preferred embodiment, a small amount of one or more element powders of Cr, Ni, Mo, Sr and Sb is mixed into the stainless steel powder, wherein the diameter of each element powder is distributed between 0.002 and 0.02 μm.
As a preferred embodiment, Cr, Ni, Mo, Sr, and Sb are mixed with stainless steel powder in the weight percentage of (Fe + C): cr: ni: mo: sr: sb (60-70): (15-20): (5-10): (2-5): (5-10): (5-10).
Other alloy powder is added into the stainless steel powder, and after casting, the wear resistance, the thermal dimensional stability and the thermal fatigue resistance of the obtained die are greatly improved.
As shown in fig. 5, a limit step 14 having a vertical distance of 0.03-0.05 mm from the highest point M of the curved surface portion 32 of the 3D glass 3 is disposed inside the groove 11.
Unexpectedly, the limiting steps are arranged in the grooves, so that when the glass is molded, the limiting steps can limit the two side edges of the glass, and the glass is prevented from swinging left and right; but because glass heating has the inflation, the step plane with 3D glass left/right side upper peak vertical direction distance is 0.03 ~ 0.05mm, can prevent that the glass edge from appearing the impression or causing the piece.
A platform 23 parallel to the limit step 14 is arranged at the position corresponding to the limit step 14 in the clamping angle 21.
The distance between the platform 23 and the lowest point N on the curved surface part 32 on the 3D glass 3 in the vertical direction is 0-0.1 mm.
While the foregoing description shows and describes the preferred embodiments of the present invention, it is to be understood that the invention is not limited to the forms disclosed herein, but is not to be construed as excluding other embodiments and is capable of use in various other combinations, modifications, and environments and is capable of changes within the scope of the inventive concept as described herein, commensurate with the above teachings, or the skill or knowledge of the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. The utility model provides a 3D glass forming die structure, includes and sets up terrace die and die from top to bottom, 3D glass presss from both sides the centre of terrace die and die, its characterized in that:
the male die is provided with two grooves which are parallel to the side edges of the 3D glass and are positioned on two sides of the 3D glass, and the female die is provided with clamping corners corresponding to the two grooves;
a limiting step with the vertical distance of 0.03-0.05 mm from the highest point on the left/right side surface of the 3D glass is arranged in the groove;
the main materials of the female die and the male die are formed by filling a stainless steel fiber framework and stainless steel powder;
the stainless steel fiber framework is a three-dimensional woven fabric which is formed by weaving stainless steel filament fibers according to the shape of a male die or a female die by a weaving process;
the diameter of the stainless steel filament fiber is 0.1-1.0 mu m, and the average diameter of the stainless steel powder is 0.05-0.15 mu m;
and the stainless steel powder is poured on the stainless steel fiber framework in a melting and spraying mode, and the male die/the female die is obtained through a forming process.
2. The structure of claim 1, wherein a platform parallel to the limiting step is disposed at a position corresponding to the limiting step in the corner clip.
3. The structure of claim 2, wherein the distance between the platform and the lowest point on the left/right side of the 3D glass along the vertical direction is 0-0.1 mm.
4. The structure of claim 3, wherein two locking edges parallel to the groove are arranged on two side edges of the male die, and the locking edges are provided with more than one locking groove for fixing the male die and the female die.
5. The structure of claim 4, wherein the female mold has a locking angle corresponding to the locking groove, and an outer contour of the locking angle coincides with an inner contour of the locking groove.
6. The structure of claim 5, wherein the weight ratio of the stainless steel filament fibers to the stainless steel powder is 1: (0.5-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711053885.1A CN107601829B (en) | 2017-10-31 | 2017-10-31 | 3D glass forming die structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711053885.1A CN107601829B (en) | 2017-10-31 | 2017-10-31 | 3D glass forming die structure |
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| Publication Number | Publication Date |
|---|---|
| CN107601829A CN107601829A (en) | 2018-01-19 |
| CN107601829B true CN107601829B (en) | 2020-10-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711053885.1A Expired - Fee Related CN107601829B (en) | 2017-10-31 | 2017-10-31 | 3D glass forming die structure |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108726853A (en) * | 2018-06-30 | 2018-11-02 | 深圳市东方碳素实业有限公司 | A kind of mold for hot bending automobile bend glass |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822402A (en) * | 2010-03-26 | 2012-12-12 | 贝卡尔特公司 | Knitted fabric of steel fibers |
| CN106077665A (en) * | 2016-06-29 | 2016-11-09 | 华南理工大学 | A kind of method of Metal screen cloth wound sintering pressure processing and manufacturing structural metallic materials |
| CN206279078U (en) * | 2016-11-18 | 2017-06-27 | 蓝思科技（长沙）有限公司 | A kind of hot bending die for improving bend glass lens surface quality |
-
2017
- 2017-10-31 CN CN201711053885.1A patent/CN107601829B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102822402A (en) * | 2010-03-26 | 2012-12-12 | 贝卡尔特公司 | Knitted fabric of steel fibers |
| CN106077665A (en) * | 2016-06-29 | 2016-11-09 | 华南理工大学 | A kind of method of Metal screen cloth wound sintering pressure processing and manufacturing structural metallic materials |
| CN206279078U (en) * | 2016-11-18 | 2017-06-27 | 蓝思科技（长沙）有限公司 | A kind of hot bending die for improving bend glass lens surface quality |
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| CN107601829A (en) | 2018-01-19 |
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