High-vacuum multi-temperature-zone heating regulation and control precision glass mold pressing device

Abstract

The invention relates to the field of optical glass production equipment, in particular to a high-vacuum multi-temperature-zone heating control precision glass mold pressing device which comprises an upper mold pressing heating disc and a lower mold pressing heating disc which are coaxially arranged, and the machining faces of the upper mold pressing heating disc and the lower mold pressing heating disc are oppositely arranged. A plurality of first mounting holes are formed in the peripheries of the upper mold pressing heating disc and the lower mold pressing heating disc, the first mounting holes are radially arranged by taking the axis of the upper mold pressing heating disc and the lower mold pressing heating disc as the center, and a resistance heating element is mounted in each first mounting hole; a plurality of second mounting holes are formed in the upper mold pressing heating disc and the lower mold pressing heating disc between the section where the resistance heating element is located and the machining surface, the second mounting holes are radially arranged with the axis of the upper mold pressing heating disc and the axis of the lower mold pressing heating disc as the center, and a temperature feedback unit is mounted in each second mounting hole. The problem that in the prior art, high-quality and high-precision mold pressing cannot be conducted on optical glass through multiple temperature zones is solved.

Description

Technical Field

[0001] The invention relates to the field of optical glass production equipment, in particular to a high vacuum multi-temperature zone heating and control precision glass molding device. Background Art

[0002] Glass molding machine is an important mechanical equipment for glass molding, mainly used to manufacture various optical glass and other glass products. Glass molding machine is to place the glass in the mold of the molding plate, heat it to a certain temperature and apply a certain pressure to get the shape we expect.

[0003] Existing glass molding machines can only perform molding at a fixed temperature, which not only has low production efficiency but also cannot regulate the filling process of the glass material. Summary of the invention

[0004] To solve the above problems, the present invention proposes a high-vacuum multi-temperature zone heating and control precision glass molding device. The present invention solves the problem in the prior art that optical glass cannot be molded with high quality and high precision in multiple temperature zones.

[0005] To achieve the above object, the technical solution adopted by the present invention is:

[0006] A high vacuum multi-temperature zone heating and control precision glass molding device, comprising an upper molding heating plate and a lower molding heating plate arranged coaxially, the processing surfaces of the upper molding heating plate and the lower molding heating plate are arranged facing each other, the outer periphery of the upper molding heating plate and the lower molding heating plate are both provided with a plurality of first mounting holes, the first mounting holes are radially arranged with the axis of the upper molding heating plate and the lower molding heating plate as the center, and a resistance heating element is installed in each of the first mounting holes;

[0007] The upper molded heating plate and the lower molded heating plate are each provided with a plurality of second mounting holes between the cross section where the resistance heating element is located and the processing surface. The second mounting holes are radially arranged with the axis of the upper molded heating plate and the lower molded heating plate as the center, and a temperature feedback unit is installed in each of the second mounting holes.

[0008] Preferably, the lower molding heating plate is positioned, the high vacuum multi-temperature zone heating and control precision glass molding device also includes a molding loading shaft, the upper molding heating plate is installed at the lower end of the molding loading shaft, and the upper molding heating plate can be loaded and pressed through the molding loading shaft.

[0009] Preferably, a load feedback unit is provided at the bottom of the lower molding heating plate, and the load feedback unit is used to monitor the output load of the molding loading shaft in real time.

[0010] Preferably, a lower isolation plate for isolating heat transfer between the lower mold pressing heating plate and the load feedback unit is provided between the lower mold pressing heating plate and the load feedback unit;

[0011] An upper isolation plate for isolating heat transfer between the upper molding heating plate and the molding loading shaft is arranged between the upper molding heating plate and the molding loading shaft.

[0012] Preferably, the upper molding heating plate and the lower molding heating plate are both arranged in the vacuum maintaining box, the top wall of the vacuum maintaining box has a dynamic sealing element, and the molding loading shaft passes through the top wall of the vacuum maintaining box through the dynamic sealing element and is connected to the upper molding heating plate.

[0013] Preferably, each box wall of the vacuum maintaining box is covered with a heat insulation layer.

[0014] Preferably, each side wall of the vacuum maintenance box is provided with a quartz observation window.

[0015] Preferably, each wall of the vacuum maintaining box is provided with a cooling device.

[0016] Preferably, the vacuum maintaining box is also connected to a vacuum pump and a nitrogen production system, wherein the vacuum pump is used to evacuate the vacuum maintaining box, and the nitrogen production system is used to transport nitrogen into the vacuum maintaining box to maintain a non-oxidizing environment.

[0017] Preferably, the resistance heating element can realize single-channel control, which can achieve a temperature fluctuation of 0.5°C for a single resistance heating element, and the temperature difference of the entire heating disk is controlled within ±1°C.

[0018] Preferably, the feed load resolution of the die-stamping loading shaft is 0.1N, and the position accuracy is 0.1μm; the load range of the die-stamping loading shaft is 0 to 100KN.

[0019] The beneficial effects of using the present invention are:

[0020] The high vacuum multi-temperature zone heating and control precision glass molding device adopts multiple resistance heating elements and temperature feedback units to cooperate with each other, and precisely controls the large-size heating plate and multiple heating areas through computer programming of the control box, and places the heating mechanism and the molding mechanism in a vacuum box purged with nitrogen, so as to realize the preparation of high-precision and high-quality precision glass products. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the high vacuum multi-temperature zone heating and control precision glass molding device of the present invention.

[0022] Figure 2 This is a schematic diagram of the vacuum maintenance box and the main internal structure of the high vacuum multi-temperature zone heating and control precision glass molding device of the present invention.

[0023] Figure 3 It is a schematic diagram of the main structure of the control system of the high vacuum multi-temperature zone heating and control precision glass molding device of the present invention.

[0024] Reference numerals include:

[0025] 1-molded loading mechanism, 2-control system, 3-molded loading shaft, 4-vacuum maintaining box, 5-support frame, 6-protective shell, 7-nitrogen production system, 8-strong / weak current control cabinet, 9-cooling system, 10-vacuum pump, 11-dynamic sealing element, 12-connecting flange, 13-upper isolation plate, 14-resistance heating element, 15-upper molded heating plate, 16-thermal insulation layer, 17-quartz material observation window, 18-temperature feedback unit, 19-lower molded heating plate, 20-lower isolation plate, 21-load feedback unit cooling system, 22-load feedback unit, 23-molded loading device controller, 24-box, 25-multi-temperature zone heating device controller, 26-multi-function support plate. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the technical solution more clear, the technical solution is further described in detail below in conjunction with specific implementation methods. It should be understood that these descriptions are only exemplary and are not intended to limit the scope of the technical solution.

[0027] In order to solve the problem that the existing glass molding machine can only perform molding at a fixed temperature, not only the production efficiency is low but also the filling process of the glass material cannot be regulated, such as Figure 1 As shown, this embodiment proposes a high vacuum multi-temperature zone heating and control precision glass molding device, such as Figure 1 As shown, the equipment in this embodiment is provided with a protective shell 6 on the outside, the middle part of the protective shell 6 is the equipment platform, a columnar or plate-shaped support frame 5 is provided at the middle corresponding to the equipment platform, a strong / weak current control cabinet 8 is provided at the lower part of the equipment platform, and a mold-pressing loading mechanism 1 is provided at the upper part of the support frame 5. Other functional equipment and auxiliary control equipment such as a nitrogen production system 7, a cooling system 9, a vacuum pump 10, and a control system 2 are also provided on the side of the protective shell 6. A vacuum maintenance box 4 is provided on the equipment platform, and precision glass molding-related molds and other equipment are provided inside the vacuum maintenance box 4. The output end of the mold-pressing loading mechanism 1 in this embodiment is provided vertically downward, and the output end of the mold-pressing loading mechanism 1 is a mold-pressing loading shaft 3.

[0028] like Figure 2As shown, each wall of the vacuum maintenance box 4 in this embodiment is covered with a heat insulation layer 16, and each wall of the vacuum maintenance box 4 is provided with a cooling device. A vacuum pump 10 and a nitrogen production system 7 are also connected to the vacuum maintenance box 4. The vacuum pump 10 is used to evacuate the vacuum maintenance box 4, and the nitrogen production system 7 is used to transport nitrogen to the vacuum maintenance box 4 to maintain a non-oxidizing environment. A quartz observation window 17 is installed on the side of the vacuum maintenance box 4, and a dynamic sealing element 11 is provided on the top of the vacuum maintenance box 4. The molded loading shaft 3 enters through the upper surface of the vacuum maintenance box 4, and a dynamic sealing element 11 is installed between the molded loading shaft 3 and the vacuum maintenance box 4. Four channels are left on the back of the vacuum maintenance box 4 to connect with the vacuum pump 10 pipeline and the nitrogen production system 7 pipeline.

[0029] The molding loading shaft 3 of the molding loading mechanism 1 enters the vacuum maintaining box 4 through the dynamic sealing element 11, so that the lower end of the molding loading shaft 3 is located inside the vacuum maintaining box 4. The precision glass molding related mold includes a coaxially arranged upper molding heating plate 15 and a lower molding heating plate 19, and the processing surfaces of the upper molding heating plate 15 and the lower molding heating plate 19 are arranged facing each other. The outer periphery of the upper molding heating plate 15 and the lower molding heating plate 19 is provided with a plurality of first mounting holes, and the first mounting holes are radially arranged with the axis of the upper molding heating plate 15 and the lower molding heating plate 19 as the center, and a resistance heating element 14 is installed in each first mounting hole; the upper molding heating plate 15 and the lower molding heating plate 19 are provided with a plurality of second mounting holes between the section where the resistance heating element 14 is located and the processing surface, and the second mounting holes are radially arranged with the axis of the upper molding heating plate 15 and the lower molding heating plate 19 as the center, and a temperature feedback unit 18 is installed in each second mounting hole. The molding loading shaft 3 can drive the upper molding heating plate 15 to move vertically, so that the upper molding heating plate 15 and the lower molding heating plate 19 are pressed and buckled.

[0030] The lower molding heating plate 19 is positioned, and the high vacuum multi-temperature zone heating and regulating precision glass molding device also includes a molding loading shaft 3. The upper molding heating plate 15 is installed at the lower end of the molding loading shaft 3, and the upper molding heating plate 15 can be loaded and pressed through the molding loading shaft 3.

[0031] A load feedback unit is provided at the bottom of the lower molding heating plate 19 , and the load feedback unit is used to monitor the output load of the molding loading shaft 3 in real time.

[0032] A lower isolation plate 20 is provided between the lower mold heating plate 19 and the load feedback unit for isolating the heat transfer between the two; an upper isolation plate 13 is provided between the upper mold heating plate 15 and the mold loading shaft 3 for isolating the heat transfer between the two.

[0033] Specifically, the vacuum maintenance box 4 is as follows Figure 2As shown, the vacuum maintenance box 4 is fixed on the support frame 5, and each surface of the vacuum maintenance box 4 is connected to the cooling system 9. The vacuum maintenance box 4 is always kept at a normal working temperature through the cooling system 9, thereby ensuring the airtightness of the vacuum maintenance box 4. The vacuum maintenance box 4 has an upper molded heating plate 15, a lower molded heating plate 19, an upper isolation plate 13, a lower isolation plate 20, a connecting flange 12, a molded loading shaft 3, a load feedback unit 22, and a load feedback unit cooling system 21.

[0034] The lower mold pressing heating plate 19 is connected to the lower isolation plate 20, and the lower isolation plate 20 is connected to the load feedback unit cooling system 21. The lower mold pressing heating plate 20 is separated from the load feedback unit cooling system 21 by the lower isolation plate 20, so that the lower mold pressing heating plate 19 can be molded at a more accurate temperature. The load feedback unit cooling system 21 is further connected to the load feedback unit 22 to maintain the normal working temperature of the load feedback unit 22, and the load feedback unit 22 is further fixed on the bottom surface of the vacuum maintenance box 4.

[0035] The upper molded heating plate 15 and the lower molded heating plate 19 are as shown in FIG. Figure 2 As shown, multiple resistance heating elements 14 are evenly distributed inside the two molded heating plates, and multiple temperature feedback units 18 are also evenly distributed on the molded heating plates. The resistance heating elements 14 and the temperature feedback units 18 are connected to the control system 2 through the vacuum maintaining box. The control system 2 collects the feedback data of the temperature feedback unit 18 and then accurately controls the heating temperature of the resistance heating element 14.

[0036] Each side panel of the vacuum maintaining box 4 is connected to the cooling system 9 pipeline and has a heat insulation layer 16. A quartz observation window 17 is installed on the side of the vacuum maintaining box 4. The molded loading shaft 3 enters through the upper surface of the vacuum maintaining box 4. A dynamic sealing element 11 is installed between the molded loading shaft 3 and the vacuum maintaining box 4. Four holes are left on the back of the vacuum maintaining box 4 to connect to the vacuum pump 10 pipeline and the nitrogen production system 7 pipeline.

[0037] like Figure 3 As shown, the control system 2 includes a box 24, a mold loading device controller 23, a multi-temperature zone heating device controller 25 and a multifunctional support plate 26. The mold loading shaft 3 is connected to the mold loading mechanism 1 and is also connected to the cooling system 9 pipeline. The load feedback unit 22 cooling system 21 is connected to the cooling system 9 through the bottom surface of the vacuum maintenance box 4.

[0038] The upper molded heating plate 15 and the lower molded heating plate 19 are evenly arranged with a number of resistance heating elements 14 and temperature feedback units 18. The resistance heating elements 14 and the temperature feedback elements are connected to the control system 2 through vacuum aviation plug electrodes. The resistance heating element 14 can realize single-channel control. Through closed-loop control, the temperature fluctuation of a single resistance heating element 14 can be realized within the range of 0.5°C. By establishing a control model of the heating system, the variable temperature and constant temperature control of the heating plate can be realized.

[0039] The upper mold heating plate 15 and the lower mold heating plate 19 have a wide load range and can achieve precise regulation within the range of 0 to 100KN. The upper and lower molds can also achieve precise load measurement, with a load resolution of 0.1N and a position accuracy of 0.1μm.

[0040] The present invention provides a high-vacuum multi-temperature zone heating and control precision glass molding device, which can precisely control a large-size heating plate and multiple heating zones through computer programming in a control box, and place a heating mechanism and a molding mechanism in a vacuum box purged with nitrogen, so as to realize the preparation of high-precision and high-quality precision glass products.

[0041] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, many changes can be made in the specific implementation methods and application scopes based on the ideas of the present technical content. As long as these changes do not deviate from the concept of the present invention, they all fall within the scope of protection of this patent.

Claims

1. A high vacuum multi-temperature zone heating and control precision glass molding device, characterized in that: It comprises an upper molded heating plate and a lower molded heating plate which are coaxially arranged, the processing surfaces of the upper molded heating plate and the lower molded heating plate are arranged facing each other, the outer periphery of the upper molded heating plate and the lower molded heating plate are provided with a plurality of first mounting holes, the first mounting holes are radially arranged with the axis of the upper molded heating plate and the lower molded heating plate as the center, and a resistance heating element is installed in each of the first mounting holes; The upper molded heating plate and the lower molded heating plate are each provided with a plurality of second mounting holes between the cross section where the resistance heating element is located and the processing surface. The second mounting holes are radially arranged with the axis of the upper molded heating plate and the lower molded heating plate as the center, and a temperature feedback unit is installed in each of the second mounting holes.

2. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 1 is characterized in that: The lower molding heating plate is positioned, and the high vacuum multi-temperature zone heating and control precision glass molding device also includes a molding loading shaft. The upper molding heating plate is installed at the lower end of the molding loading shaft, and the upper molding heating plate can be loaded and pressed through the molding loading shaft.

3. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 2 is characterized in that: A load feedback unit is disposed at the bottom of the lower molding heating plate, and the load feedback unit is used to monitor the output load of the molding loading shaft in real time.

4. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 3 is characterized in that: A lower isolation plate is provided between the lower mold pressing heating plate and the load feedback unit for isolating heat transfer between the two; An upper isolation plate for isolating heat transfer between the upper molding heating plate and the molding loading shaft is arranged between the upper molding heating plate and the molding loading shaft.

5. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 1 is characterized in that: The upper molding heating plate and the lower molding heating plate are both arranged in the vacuum maintaining box. The top wall of the vacuum maintaining box has a dynamic sealing element. The molding loading shaft passes through the top wall of the vacuum maintaining box through the dynamic sealing element and is connected to the upper molding heating plate.

6. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 5 is characterized in that: Each box wall of the vacuum maintenance box is covered with a heat insulation layer.

7. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 5 is characterized in that: Each side wall of the vacuum maintenance box is provided with a quartz observation window; Each box wall of the vacuum maintenance box is provided with a cooling device.

8. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 5 is characterized in that: The vacuum maintaining box is also connected to a vacuum pump and a nitrogen making system. The vacuum pump is used to evacuate the vacuum maintaining box, and the nitrogen making system is used to transport nitrogen into the vacuum maintaining box to maintain a non-oxidizing environment.

9. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 1, characterized in that: The resistance heating element can realize single-channel control, and can realize a temperature fluctuation of 0.5°C for a single resistance heating element, and the temperature difference of the entire heating disk is controlled within ±1°C.

10. The high vacuum multi-temperature zone heating and control precision glass molding device according to claim 2, characterized in that: The feed load resolution of the die-stamping loading axis is 0.1N, and the position accuracy is 0.1μm; the load range of the die-stamping loading axis is 0 to 100KN.

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