CN217997023U - Optical glass forming bottom die - Google Patents
Optical glass forming bottom die Download PDFInfo
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- CN217997023U CN217997023U CN202222471525.6U CN202222471525U CN217997023U CN 217997023 U CN217997023 U CN 217997023U CN 202222471525 U CN202222471525 U CN 202222471525U CN 217997023 U CN217997023 U CN 217997023U
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- cooling medium
- bottom die
- medium inlet
- medium outlet
- cooling
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Abstract
The utility model provides an optical glass forming bottom die for uniformly cooling glass liquid, wherein a cooling medium inlet channel, a cooling medium outlet channel and a through hole are arranged inside a bottom die body, one ends of the cooling medium inlet channel and the cooling medium outlet channel are respectively a cooling medium inlet and a cooling medium outlet and are arranged on the rear end face of the bottom die body, and the other ends of the cooling medium inlet channel and the cooling medium outlet channel are communicated through the through hole; the cooling medium outlet channel is positioned at two sides of the cooling medium inlet channel, and the distance between the cooling medium inlet and the cooling medium outlet is larger than the distance between the cooling medium inlet channel and the cooling medium outlet channel positioned at one end of the through hole. The utility model discloses reduce to the cooling range of glass liquid forward from the back gradually, weaken bottom die both sides glass liquid cooling ability gradually, strengthen bottom die center glass liquid cooling ability gradually, reduce bottom die center and both sides glass liquid difference in temperature, solve the shaping stripe problem that brings because of the bottom die cooling inequality.
Description
Technical Field
The utility model relates to an optical glass forming device, concretely relates to optical glass shaping die block.
Background
When the optical glass is produced, high-temperature glass liquid flows out of the discharge pipe into the forming mold, the high-temperature glass liquid is firstly contacted with a forming stop block in the forming mold, the glass liquid cooled by the forming stop block flows onto the forming bottom mold, and a solid optical glass strip is formed after the forming bottom mold is cooled again. For glass with high discharging temperature, small flow and difficult extension in the forming process, if only depending on the cooling of the forming stop block to the glass liquid, the glass liquid in the middle part and the edge part of the bottom die has certain temperature difference in the forming process, so that the quality defect of forming stripes on the lower surface or the upper surface of the glass is caused, and the glass processing is wasted and even scrapped. Therefore, the bottom die is required to assist cooling to uniformly radiate the glass liquid, the temperature difference between the glass liquid in the middle and the glass liquid at two ends is reduced, and the problem of stripes of the glass strips is solved.
In the traditional bottom die design, the glass liquid in the center and two sides of the bottom die is cooled together in the process of cooling the glass liquid, and the cooling area is too large. As the molten glass flows forward on the bottom mold, the cooling range of the molten glass by the bottom mold is unchanged. However, in the actual case, the cooling rate of the molten glass on both sides of the mold is higher than that of the molten glass in the center of the mold, and the cooling range of the molten glass by the mold is gradually narrowed as the molten glass flows forward on the mold. This causes the temperature difference between the molten glass in the middle and two sides of the bottom mold during the cooling process of the molten glass in the conventional bottom mold, which results in the formation of forming striations.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that an optical glass forming bottom die for uniformly cooling glass liquid is provided.
The utility model provides a technical scheme that technical problem adopted is: the optical glass forming bottom die comprises a bottom die body, wherein a cooling medium inlet channel, a cooling medium outlet channel and a through hole are arranged in the bottom die body, one end of the cooling medium inlet channel and one end of the cooling medium outlet channel are respectively a cooling medium inlet and a cooling medium outlet, the cooling medium inlet and the cooling medium outlet are arranged on the rear end face of the bottom die body, and the other ends of the cooling medium inlet channel and the cooling medium outlet channel are communicated through the through hole; the cooling medium inlet channel is located in the middle, the cooling medium outlet channel is located on two sides of the cooling medium inlet channel, and the distance between the cooling medium inlet and the cooling medium outlet is larger than the distance between the cooling medium inlet channel and the cooling medium outlet channel and located at one end of the through hole.
Furthermore, the included angle alpha between the central axes of the cooling medium inlet channel and the cooling medium outlet channel is 10-60 degrees.
Furthermore, the number of the cooling medium inlet channels is more than or equal to 1, the length is 100-400mm, and the diameter is 5-30mm. The number of the cooling medium outlet channels is an even number which is more than or equal to 2, the length is 100-400mm, and the diameter is 5-30mm.
Furthermore, the number of the cooling medium outlet channels is an even number which is more than or equal to 4, the cooling medium outlets are distributed on the two sides of the cooling medium inlet at equal intervals, and the distance between the cooling medium outlets is 40-150mm.
Furthermore, the number of the cooling medium inlet channels is 1, and the central axis of the cooling medium inlet channel coincides with the central line of the bottom die body.
Furthermore, an inverted L-shaped notch is formed in the bottom of the front end of the bottom die body, and the width of the notch is the same as that of the bottom die body.
Furthermore, the vertical distance between the center of the cooling medium inlet and the upper surface of the bottom die body is 5-20mm, and the vertical distance between the center of the cooling medium outlet and the upper surface of the bottom die body is 5-20mm.
Further, the upper surfaces of the left end and the right end of the bottom die body are provided with protrusions, the height and the width of each protrusion are matched with the forming stop blocks, and the length of each protrusion is the same as that of the bottom die body.
The utility model has the advantages that: because the cooling medium inlet channel and the cooling medium outlet channel are distributed with included angles, the cooling range of the bottom die to the glass liquid is gradually reduced from back to front, the cooling capacity of the glass liquid on two sides of the bottom die is gradually weakened, the cooling capacity of the glass liquid in the center of the bottom die is gradually enhanced, the glass liquid can be uniformly cooled, the temperature difference between the glass liquid in the center and two sides of the bottom die is further reduced, and the problem of forming stripes caused by uneven cooling of the bottom die is solved.
Drawings
Fig. 1 is a front view of the optical glass forming bottom mold of the present invention.
Fig. 2 is a top view of fig. 1.
Fig. 3 is a side view of fig. 1.
Fig. 4 is a schematic structural view of the optical glass forming bottom mold and the forming stop block after being assembled.
Detailed Description
As shown in fig. 1-4, the optical glass forming bottom mold of the present invention includes a bottom mold body 1, wherein a cooling medium inlet channel 2, a cooling medium outlet channel 3 and a through hole 6 are disposed inside the bottom mold body 1, one end of the cooling medium inlet channel 2 and one end of the cooling medium outlet channel 3 are respectively a cooling medium inlet 4 and a cooling medium outlet 5, the cooling medium inlet 4 and the cooling medium outlet 5 are disposed on the rear end surface of the bottom mold body 1, and the other end of the cooling medium inlet channel 2 and the other end of the cooling medium outlet channel 3 are communicated with each other through the through hole 6; the cooling medium inlet channel 2 is positioned in the middle, the cooling medium outlet channel 3 is positioned at two sides of the cooling medium inlet channel 2, the included angle alpha between the central axes of the cooling medium inlet channel 2 and the cooling medium outlet channel 3 is 10-60 degrees, and the distance between the cooling medium inlet 4 and the cooling medium outlet 5 is greater than the distance between the cooling medium inlet channel 2 and the cooling medium outlet 3 at one end of the through hole 6, as shown in fig. 2; the upper surfaces of the left end and the right end of the bottom die body 1 are provided with protrusions 7 used for being matched with forming stop blocks 8, the height and the width of the protrusions 7 are matched with the forming stop blocks 8, and the length of the protrusions is the same as that of the bottom die body 1; the bottom die is characterized in that an inverted L-shaped notch 9 is formed in the bottom of the front end of the bottom die body 1, the length and the height of the notch 9 are determined according to the properties of glass, and the width of the notch is the same as that of the bottom die body 1, so that the cooling capacity of the glass at the front end of the bottom die body 1 is reduced, and the glass at the front end of the bottom die body is in a solid state, so that the quality defects such as an explosion point and cracks can occur at the bottom due to too large cooling capacity.
The bottom die body 1 is made of heat-resistant and heat-conductive materials, preferably heat-resistant and heat-conductive metals, and more preferably cast iron; the vertical distance from the center of the cooling medium inlet 4 to the upper surface of the bottom die body 1 is 5-20mm, and the vertical distance from the center of the cooling medium outlet 5 to the upper surface of the bottom die body 1 is 5-20mm; the number and the length of the cooling medium inlet channels 2 and the cooling medium outlet channels 3 are selected according to the size of an actual glass strip and a mold, so that molten glass is cooled more uniformly, and the cooling effect is optimal. If the number of the cooling medium channels 3 is an even number which is more than or equal to 4, the distance between the cooling medium outlets 5 is 40-150mm, the cooling medium outlets 5 are distributed on the two sides of the cooling medium inlet 4 at equal intervals, the cooling of the molten glass can be more uniform due to the equal interval distribution, and the temperature difference of the glass is smaller; if the number of the cooling medium inlet passages 2 is 1, the central axis of the cooling medium inlet passage 2 coincides with the central line of the bottom die body 1, as shown in fig. 2.
The utility model discloses according to the distribution condition design of die block temperature in the in-service use, concentrate at die block central point on the one hand and to the glass liquid cooling, on the other hand die block reduces to the cooling zone of glass liquid forward from the back gradually, weakens die block both sides glass liquid cooling ability gradually, strengthens die block center glass liquid cooling ability gradually, reaches the purpose that reduces die block center and both sides glass liquid difference in temperature, solves the too big optical glass shaping stripe difficult problem that leads to of difference in temperature.
Herein, the direction in which the molten glass flows in the forming mold is taken as the forward direction, the rear end of the bottom mold body 1 refers to the end where the molten glass starts to flow, i.e., the lower end position in fig. 2, and the end opposite to the rear end is the front end of the bottom mold body 1, i.e., the upper end position in fig. 2; the left end of the bottom die body 1 is the left end position in fig. 2, and the right end of the bottom die body 1 is the right end position in fig. 2.
When the optical glass forming mold works, the optical glass forming bottom mold of the utility model is firstly placed on the base of the forming machine, and the forming stop block 8 is placed at the rear end of the forming bottom mold, as shown in figure 4; guiding the molten glass to a forming stop block 8 from a discharge nozzle, and then flowing to a forming bottom die through the forming stop block 8; the cooling medium enters the bottom die body 1 through the cooling medium inlet 4 and then flows out of the bottom die body 1 through the through hole 6 through the cooling medium outlet 5.
Compared with the prior art, the forming bottom die of the utility model reduces the distance between the cooling medium inlet 4 and the cooling medium outlet 5, can intensively cool the glass liquid on the rear end of the forming bottom die, and reduces the temperature difference between the glass liquid at the center of the bottom die and at the two sides of the bottom die; along with the flow of the glass liquid to the front of the bottom die, due to the fan-shaped distribution of the cooling medium inlet channel 2 and the cooling medium outlet channel 3, the cooling range of the bottom die to the glass liquid is gradually reduced from back to front, and the temperature difference between the glass liquid at the middle part and the glass liquid at the two sides of the bottom die is further reduced, so that the problem of forming stripes caused by uneven cooling of the bottom die in the optical glass forming process is solved.
Claims (10)
1. The optical glass forming bottom die is characterized in that: the bottom die comprises a bottom die body (1), wherein a cooling medium inlet channel (2), a cooling medium outlet channel (3) and a through hole (6) are arranged in the bottom die body (1), one end of the cooling medium inlet channel (2) and one end of the cooling medium outlet channel (3) are respectively a cooling medium inlet (4) and a cooling medium outlet (5), the cooling medium inlet (4) and the cooling medium outlet (5) are arranged on the rear end face of the bottom die body (1), and the other ends of the cooling medium inlet channel (2) and the cooling medium outlet channel (3) are communicated through the through hole (6); the cooling medium inlet channel (2) is located in the middle, the cooling medium outlet channel (3) is located on two sides of the cooling medium inlet channel (2), and the distance between the cooling medium inlet (4) and the cooling medium outlet (5) is larger than the distance between the cooling medium inlet channel (2) and the cooling medium outlet channel (3) located at one end of the through hole (6).
2. The optical glass forming bottom mold according to claim 1, wherein: the included angle alpha between the central axes of the cooling medium inlet channel (2) and the cooling medium outlet channel (3) is 10-60 degrees.
3. The optical glass forming mold according to claim 1 or 2, wherein: the number of the cooling medium inlet channels (2) is more than or equal to 1, the length is 100-400mm, and the diameter is 5-30mm.
4. The optical glass forming mold according to claim 1 or 2, wherein: the number of the cooling medium outlet channels (3) is an even number which is more than or equal to 2, the length is 100-400mm, and the diameter is 5-30mm.
5. The optical glass forming mold according to claim 1 or 2, wherein: the number of the cooling medium outlet channels (3) is an even number which is not less than 4, the cooling medium outlets (5) are distributed on two sides of the cooling medium inlet (4) at equal intervals, and the distance between the cooling medium outlets (5) is 40-150mm.
6. The optical glass forming bottom mold according to claim 1 or 2, characterized in that: the number of the cooling medium inlet channels (2) is 1, and the central axis of the cooling medium inlet channels (2) coincides with the central line of the bottom die body (1).
7. The optical glass forming mold according to claim 1 or 2, wherein: the bottom die is characterized in that an inverted L-shaped notch (9) is formed in the bottom of the front end of the bottom die body (1), and the width of the notch (9) is the same as that of the bottom die body (1).
8. The optical glass forming mold according to claim 1 or 2, wherein: the vertical distance between the center of the cooling medium inlet (4) and the upper surface of the bottom die body (1) is 5-20mm, and the vertical distance between the center of the cooling medium outlet (5) and the upper surface of the bottom die body (1) is 5-20mm.
9. The optical glass forming mold according to claim 1 or 2, wherein: bottom die body (1) is left and right sides both ends upper surface is provided with arch (7), the height and the width of arch (7) match with shaping dog (8), and length is the same with the length of bottom die body (1).
10. The optical glass forming mold according to claim 1 or 2, wherein: the bottom die body (1) is made of cast iron.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222471525.6U CN217997023U (en) | 2022-09-16 | 2022-09-16 | Optical glass forming bottom die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222471525.6U CN217997023U (en) | 2022-09-16 | 2022-09-16 | Optical glass forming bottom die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217997023U true CN217997023U (en) | 2022-12-09 |
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ID=84290380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222471525.6U Active CN217997023U (en) | 2022-09-16 | 2022-09-16 | Optical glass forming bottom die |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217997023U (en) |
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2022
- 2022-09-16 CN CN202222471525.6U patent/CN217997023U/en active Active
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