Feeding device for glass forming and control method thereof

Abstract

The invention belongs to the technical field of glass forming, and provides a feeding device for glass forming and a control method thereof.The feeding device comprises a material channel, a material conveying assembly, a material nozzle, a workbench and a mold; wherein molten glass is melted in the material channel; the connecting pipe and the conveying pipe are sequentially connected, one end of the connecting pipe is connected with the material channel, and the other end of the connecting pipe is connected with the conveying pipe; the punch is mounted in the conveying pipe; a plurality of electrode plates for temperature control are mounted on the surfaces of the connecting pipe and the conveying pipe; the material nozzle is connected with the conveying pipe, the mold is located at a casting opening of the material nozzle, and the workbench is used for installing the mold. According to the feeding device, through the arrangement of the connecting pipe and the conveying pipe, molten glass can be conveyed by keeping proper viscosity, the molten glass is cast into a mold through the material nozzle, cutting operation is not needed in the whole process, the production period can be effectively shortened, and the production efficiency and economic benefits can be effectively improved.

Description

Technical Field

[0001] The invention belongs to the technical field of glass molding, and in particular relates to a feeding device for glass molding and a control method thereof. Background Art

[0002] In the traditional glass block production process, the process includes multiple links. First, the glass raw materials are formed into rods or blocks through a specific process. Then, these rods or blocks are cut and divided into small blocks with certain weight specifications. After that, these small blocks are placed in a softening furnace and gradually heated to the softening temperature of the glass to make the glass blocks plastic. After that, the softened blocks are quickly placed in a pre-prepared forming mold for pressing operation to form the glass blocks into the desired shape. Finally, the internal stress is eliminated through the annealing process to produce the final glass product.

[0003] However, this existing production process has many disadvantages. The overall process steps are extremely complicated, involving production processes such as cutting operations. As a result, the entire production cycle is significantly extended, and the manpower, material resources and time costs consumed in the production process are greatly increased, which greatly affects production efficiency and economic benefits. Summary of the invention

[0004] In order to solve the problems in the background technology, the present invention provides a feeding device for glass molding and a control method thereof.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A feeding device for glass molding, comprising a material channel, a material feeding assembly, a material nozzle, a workbench and a mold;

[0007] The material channel contains molten glass;

[0008] The material conveying assembly includes a punch and a connecting pipe and a conveying pipe connected in sequence, wherein one end of the connecting pipe is connected to the material channel, and the other end is connected to the conveying pipe;

[0009] The punch is installed in the delivery pipe;

[0010] A plurality of electrode sheets for temperature control are installed on the surfaces of the connecting pipe and the conveying pipe;

[0011] The nozzle is connected to a delivery pipe and is used to pour glass liquid into the mold;

[0012] The mold is located at the pouring port of the nozzle;

[0013] The workbench is used for installing the mold.

[0014] Preferably, a first electrode sheet and a second electrode sheet are installed on the surface of the connecting tube, the first electrode sheet is located at the inlet of the connecting tube, and the second electrode sheet is located at the outlet of the connecting tube.

[0015] Preferably, the delivery pipe comprises a storage pipe and a working pipe which are coaxially connected in sequence;

[0016] A fourth electrode sheet is installed on the surface of the position where the material storage tube is connected to the working tube, and a third electrode sheet is installed on the surface of one end of the material storage tube away from the working tube;

[0017] A fifth electrode sheet is installed on the port surface corresponding to the outlet of the working tube.

[0018] Preferably, the diameter of the material storage tube is larger than the diameter of the working tube.

[0019] Preferably, one end of the punch is located outside the delivery tube and is connected to a driving device;

[0020] The other end of the punch is provided with a spiral blade and is located in the conveying pipe.

[0021] Preferably, a heating coil is installed on the surface of the nozzle.

[0022] Preferably, the molds are provided in plurality and are evenly mounted on the surface of the workbench;

[0023] The workbench is rotatable, and a driving motor is connected to the rotation center.

[0024] A control method for the above-mentioned feeding device for glass forming comprises the following steps:

[0025] The glass liquid in the material channel is transported to the delivery pipe through the connecting pipe, and the viscosity of the glass liquid in the connecting pipe and the delivery pipe is controlled by the electrode sheet;

[0026] Perform several casting cycles, in each casting cycle, the glass liquid in the nozzle is lifted upward and punched downward by the punch, and then the glass liquid is cast into the mold;

[0027] After each casting cycle, another mold is switched to the casting port of the nozzle through the workbench.

[0028] Preferably, controlling the viscosity of the glass liquid in the connecting tube and the conveying tube by the electrode sheet comprises the following steps:

[0029] The viscosity of the glass liquid at the inlet of the connecting pipe is controlled to be 200-500Pa.S by the electrode sheet;

[0030] The viscosity of the glass liquid at the outlet of the connecting pipe is controlled to be 500-2000Pa.S by the electrode sheet;

[0031] The viscosity of the glass liquid in the conveying pipe is controlled to be 1000-2000Pa.S by the electrode sheet.

[0032] Preferably, the casting cycle comprises the following steps:

[0033] The driving punch rotates n times 180° and reciprocates up and down along the axial direction of the conveying pipe once, where n is a natural number;

[0034] When the punch moves downward, the downward pressure generated causes the molten glass in the nozzle to rush downward, and then the nozzle pours the molten glass into the mold once;

[0035] When the punch moves upward, the upward force generated causes the molten glass in the nozzle to be lifted upward, thereby causing the molten glass in the nozzle to flow back.

[0036] Preferably, during the pouring cycle, the viscosity of the molten glass in the nozzle is 20-200 Pa.S.

[0037] Beneficial effects of the present invention:

[0038] 1. The feeding device of the present invention can keep the glass liquid at an appropriate viscosity for transportation by providing a connecting pipe and a conveying pipe, and cast the glass liquid into the mold through the nozzle. There is no cutting operation in the whole process, which can effectively reduce the production cycle and improve production efficiency and economic benefits;

[0039] 2. The control method of the present invention improves the traditional process into a production line in which the high-temperature molten glass flows through the feeding device, and then the molten glass is directly dripped into the mold in the form of droplets of a certain weight to be formed into the required glass block material. Compared with the traditional production method, this control method shortens the production process and saves production time, thereby improving production efficiency; it reduces the scraps generated in the cutting process in the traditional production method, and improves material utilization; and it can realize the mode of automatic feeding and continuous molding production.

[0040] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0042] Figure 1A schematic structural diagram of a feeding device for glass forming according to the present invention is shown;

[0043] Figure 2 A flow chart of a control method of the present invention is shown.

[0044] In the figure: 1. material channel; 2. connecting pipe; 3. punch; 4. material storage pipe; 5. working pipe; 6. material nozzle; 7. heating coil; 8. workbench; 9. driving motor; 10. mold; 11. first electrode sheet; 12. second electrode sheet; 13. third electrode sheet; 14. fourth electrode sheet; 15. fifth electrode sheet. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] like Figure 1 As shown, a feeding device for glass molding includes a material channel 1, a material feeding assembly, a material nozzle 6, a workbench 8 and a mold 10. The material channel 1 contains molten glass (such as Figure 1 The glass liquid provides the production line with clarified, uniform and qualified high-temperature glass liquid, and ensures stable glass liquid surface height and glass liquid viscosity during the molding production process.

[0047] Along the path of conveying the glass liquid, the feeding assembly includes a punch 3 and a connecting pipe 2 and a conveying pipe connected in sequence. One end of the connecting pipe 2 is connected to the material channel 1, and the other end is connected to the conveying pipe. The connecting pipe 2 is made of platinum material, and the temperature of the connecting pipe 2 is adjusted by single-phase power supply of the electrode sheet, and the outside of the connecting pipe 2 is wrapped with thermal insulation and refractory materials.

[0048] The punch 3 is installed in the conveying pipe and is made of platinum material. The lower part of the punch 3 is provided with spiral blades. The blades alternately generate a force to lift and press down the glass liquid in the nozzle 6 during the radial rotation and up and down reciprocating motion of the punch 3.

[0049] It should be noted that the punch 3 is a moving part of the feeding device, which rotates radially at a certain speed and reciprocates axially up and down. During the radial rotation and axial up and down reciprocating motion of the punch 3, the force of lifting and pressing the glass liquid in the nozzle 6 is alternately generated, so as to realize the function of lifting the glass liquid in the nozzle 6 upward and punching it downward. The upper part of the punch 3 is located outside the conveying pipe, and is connected to a control and transmission unit (driving device) for adjusting the radial rotation speed of the punch 3 and the height control of the axial up and down reciprocating motion.

[0050] Several electrode sheets for temperature control are installed on the surface of the connecting pipe 2 and the conveying pipe. Specifically, a first electrode sheet 11 and a second electrode sheet 12 are installed on the surface of the connecting pipe 2. The first electrode sheet 11 is located at the inlet of the connecting pipe 2, and the second electrode sheet 12 is located at the outlet of the connecting pipe 2.

[0051] In addition, the conveying pipe includes a storage pipe 4 and a working pipe 5 which are coaxially connected in sequence. A fourth electrode sheet 14 is installed on the surface of the port where the storage pipe 4 is connected to the working pipe 5, and a third electrode sheet 13 is installed on the surface of the end away from the working pipe 5; a fifth electrode sheet 15 is installed on the surface of the port corresponding to the outlet of the working pipe 5.

[0052] It should be noted that the storage tube 4 is made of platinum material, and the viscosity of the glass liquid in the storage tube 4 is adjusted by single-phase power supply of the third electrode sheet 13 and the fourth electrode sheet 14. The outside of the storage tube 4 is wrapped with thermal insulation and refractory materials.

[0053] It should be further explained that the first electrode sheet 11 and the second electrode sheet 12 mainly play the role of adjusting the viscosity of the glass liquid in the connecting tube. The viscosity of the glass liquid at the outlet of the connecting tube 2 is preferably 500-2000 Pa.S, and the liquid level fluctuation range is 0-1 mm.

[0054] The storage tube 4 mainly serves to store a certain amount of glass liquid and to homogenize the viscosity of the glass liquid, thereby providing a stable supply of glass liquid to the working tube 5 and ensuring a stable viscosity of the glass liquid. The viscosity of the glass liquid in the storage tank is preferably 1000-2000 Pa.S.

[0055] The working tube 5 is also made of platinum material, and its diameter is smaller than the storage tube 4. The working tube 5 realizes stable control of the viscosity of the glass liquid in the working tube 5 by single-phase power supply through the fourth electrode plate 14 and the fifth electrode plate 15. The outside of the working tube 5 is also wrapped with thermal insulation and refractory materials.

[0056] It should be noted that the working area of ​​the lower spiral blade of the punch 3 is in the working tube 5. Under the combined effect of periodic radial rotation and up and down reciprocating motion, glass liquid with a certain viscosity is formed under periodic pressure changes to provide glass liquid to the nozzle 6 in a pulsating flow manner.

[0057] The nozzle 6 is connected to the delivery pipe and is used to pour glass liquid into the mold 10. Specifically, the nozzle 6 is made of a platinum tube material with a smaller diameter. The diameter is determined by the weight of the molded material block and the production volume of the feeding system. The nozzle 6 is a detachable component. When the specifications of the molded material block change greatly, the specifications of the molded material block can be changed by replacing the nozzle 6 with different diameters. A high-frequency heating coil 7 is installed outside the nozzle 6. The heating coil 7 mainly plays the role of reducing the viscosity of the glass liquid at the nozzle 6, so that the glass liquid droplet of a certain weight formed at the tube mouth is quickly separated from the nozzle 6 under the action of gravity into a droplet and flows into the mold 10 below.

[0058] It should be noted that the power of the coil 16 is adjusted so that the droplets are quickly separated from the nozzle 6 when formed, and the viscosity at the outlet of the nozzle 6 is preferably 20-200 Pa.S.

[0059] The mold 10 is located at the casting port of the nozzle 6 ( Figure 1 The workbench 8 is located directly below the casting port) and is used to receive the molten glass and then cool it to form. The workbench 8 can be a circular platform, and multiple molds 10 are evenly installed along the workbench 8. Then the rotation center of the workbench 8 is connected to the drive motor 9, and the drive motor 9 can drive the workbench 8 to rotate. During the glass casting process, if one mold 10 has been cast, the other mold 10 that has not yet been poured with glass liquid can be switched to the position directly below the nozzle 6 by rotating the workbench 8.

[0060] It should be noted that Figure 1 B is a glass drop of a certain weight dripped from the nozzle 6. After the drop enters the mold 10, it is formed into a block. Then the workbench 8 is immediately rotated to a certain angle, and a new mold 10 is transferred to the bottom of the nozzle 6 to wait for new drops of material to drip. C is the block after the molding, cooling and finalization. After the mold 10 is taken out by the robot and put into the annealing furnace for annealing, the desired product is obtained. In addition, the final glass products include but are not limited to glass balls, glass lenses, special-shaped glass blocks and other products, as long as the corresponding mold 10 is selected.

[0061] In general, the above-mentioned feeding device can realize the automatic and continuous production of glass blocks, and all moving parts and the glass viscosity in each part can be automatically and stably controlled. Secondly, the feeding device changes and controls the viscosity of the glass liquid, and under the periodic lifting and pressing of the material by the punch 3, the glass liquid at the outlet of the nozzle 6 forms a continuous droplet with a certain stable weight under the combined action of gravity and the viscosity of the glass liquid in the tube. Finally, the parts of the feeding device that contact the high-temperature glass are made of platinum material, which does not pollute the glass liquid, and adopts an efficient direct heating method and is wrapped with heat insulation materials on the outside. All parts of the feeding system can achieve stable viscosity control of the glass liquid.

[0062] like Figure 2As shown, a control method is used for the above-mentioned feeding device for glass forming, comprising the following steps:

[0063] S1: The glass liquid in the material channel 1 is transported to the delivery pipe through the connecting pipe 2, and the viscosity of the glass liquid in the connecting pipe 2 and the delivery pipe is controlled by the electrode sheet.

[0064] S2: performing several casting cycles, in each casting cycle, the punch 3 lifts the molten glass in the nozzle 6 upward and punches it downward, and then casts the molten glass into the mold 10.

[0065] S3: After each casting cycle is completed, another mold 10 is switched to the casting port of the nozzle 6 through the workbench 8.

[0066] As a preferred solution, in S1, the viscosity of the glass liquid in the connecting tube 2 and the conveying tube is controlled by the electrode sheet, including the following steps:

[0067] The viscosity of the glass liquid at the inlet of the connecting pipe 2 is controlled by the electrode sheet to be 200-500 Pa.S; the viscosity of the glass liquid at the outlet of the connecting pipe 2 is controlled by the electrode sheet to be 500-2000 Pa.S; the viscosity of the glass liquid in the conveying pipe is controlled by the electrode sheet to be 1000-2000 Pa.S.

[0068] It should be noted that glass is a non-crystalline material, and its viscosity changes significantly with temperature. When the temperature rises, the kinetic energy of the glass molecules increases, and the bonding force between the molecules weakens, resulting in increased fluidity (reduced viscosity); conversely, when the temperature drops, the molecular activity slows down and the viscosity increases rapidly. Therefore, the purpose of changing the viscosity of the glass liquid is to change the fluidity of the glass liquid. Figure 1 The connecting pipe 2 and the conveying pipe will also be equipped with corresponding heating devices (such as coils). The main function of the electrode sheet is to stabilize the temperature and prevent the glass liquid temperature from being too high or too low.

[0069] As a preferred solution, the casting cycle of S2 includes the following steps:

[0070] S201: Drive the punch 3 to rotate n times 180° and reciprocate up and down along the axial direction of the conveying pipe once, where n is a natural number; when the punch 3 moves downward, the downward pressure force generated causes the molten glass in the nozzle 6 to rush downward, thereby causing the nozzle 6 to pour the molten glass into the mold 10 once; when the punch 3 moves upward, the upward force generated causes the molten glass in the nozzle 6 to lift the material upward, thereby causing the molten glass in the nozzle 6 to flow back.

[0071] It should be noted that during the pouring cycle, the viscosity of the glass liquid in the nozzle 6 is 20-200 Pa.S, and the temperature of the nozzle 6 can be controlled by heating the heating coil 7. The viscosity of the qualified glass liquid in the channel 1 is preferably 200-500 Pa.S, and the liquid level fluctuation range is 0-1 mm.

[0072] It should be further explained that the radial rotation speed control principle of the punch 3 is: each time the punch 3 moves up and down axially, the punch 3 rotates n times 180°, where n is a natural number 1, 2, 3, 4..., preferably 1 or 2. The frequency control principle of the axial up and down reciprocating motion of the punch 3 is: each time a glass block is formed, the punch 3 moves up and down axially once. The stroke control principle of the axial up and down reciprocating motion of the punch 3 is: when the punch 3 moves to the lowest height, the glass liquid droplets just drip out of the nozzle 6 under the action of gravity; when the punch 3 moves to the highest height, the glass liquid at the nozzle 6 mouth is retracted to a position 0-30mm away from the nozzle 6 mouth, preferably 5-10mm.

[0073] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein; and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A feeding device for glass forming, characterized in that: It comprises a material channel (1), a material feeding component, a material nozzle (6), a workbench (8) and a mold (10); The material channel (1) contains molten glass; The material conveying assembly comprises a punch (3) and a connecting pipe (2) and a conveying pipe which are connected in sequence, wherein one end of the connecting pipe (2) is connected to the material channel (1), and the other end is connected to the conveying pipe; The punch (3) is installed in the delivery pipe; A plurality of electrode sheets for temperature control are installed on the surfaces of the connecting pipe (2) and the conveying pipe; The nozzle (6) is connected to a delivery pipe and is used to pour molten glass into the mold (10); The mold (10) is located at the pouring port of the nozzle (6); The workbench (8) is used to install the mold (10).

2. A feeding device for glass forming according to claim 1, characterized in that: A first electrode sheet (11) and a second electrode sheet (12) are mounted on the surface of the connecting tube (2); the first electrode sheet (11) is located at the inlet of the connecting tube (2), and the second electrode sheet (12) is located at the outlet of the connecting tube (2).

3. A feeding device for glass forming according to claim 1, characterized in that: The conveying pipe comprises a material storage pipe (4) and a working pipe (5) which are coaxially connected in sequence; A fourth electrode sheet (14) is installed on the surface of the position where the material storage tube (4) is connected to the working tube (5), and a third electrode sheet (13) is installed on the surface of one end of the material storage tube (4) away from the working tube (5); A fifth electrode sheet (15) is installed on the port surface corresponding to the outlet of the working tube (5).

4. A feeding device for glass forming according to claim 3, characterized in that: The diameter of the material storage pipe (4) is greater than the diameter of the working pipe (5).

5. A feeding device for glass forming according to claim 1, characterized in that: One end of the punch (3) is located outside the delivery pipe and is connected to a driving device; The other end of the punch (3) is provided with a spiral blade and is located in the conveying pipe.

6. A feeding device for glass forming according to claim 1, characterized in that: A heating coil (7) is installed on the surface of the nozzle (6).

7. A feeding device for glass forming according to any one of claims 1 to 6, characterized in that: The molds (10) are provided in plurality and are evenly mounted on the surface of the workbench (8); The workbench (8) is rotatably arranged, and a driving motor (9) is connected to the rotation center.

8. A control method for the feeding device for glass forming according to any one of claims 1 to 7, characterized in that: The following steps are involved: The glass liquid in the material channel (1) is transported to the delivery pipe through the connecting pipe (2), and the viscosity of the glass liquid in the connecting pipe (2) and the delivery pipe is controlled by the electrode sheet; Performing a number of casting cycles, in each casting cycle, the glass liquid in the nozzle (6) is lifted upward and punched downward by the punch (3), thereby casting the glass liquid into the mold (10); After each casting cycle is completed, another mold (10) is switched to the casting port of the nozzle (6) through the workbench (8).

9. A control method according to claim 8, characterized in that: Controlling the viscosity of the glass liquid in the connecting pipe (2) and the conveying pipe by means of an electrode sheet comprises the following steps: The viscosity of the glass liquid at the inlet of the connecting pipe (2) is controlled to be 200-500 Pa.S by means of an electrode sheet; The viscosity of the glass liquid at the outlet of the connecting pipe (2) is controlled to be 500-2000 Pa.S by means of an electrode sheet; The viscosity of the glass liquid in the conveying pipe is controlled to be 1000-2000Pa.S by the electrode sheet.

10. A control method according to claim 8, characterized in that: The pouring cycle comprises the following steps: The driving punch (3) is rotated n times 180 degrees and reciprocated up and down along the axial direction of the conveying pipe once, where n is a natural number; When the punch (3) moves downward, the downward pressure force generated causes the glass liquid in the nozzle (6) to rush downward, thereby causing the nozzle (6) to pour the glass liquid into the mold (10) once; When the punch (3) moves upward, the upward force generated causes the molten glass in the nozzle (6) to be lifted upward, thereby causing the molten glass in the nozzle (6) to flow back.

11. A control method according to claim 8, characterized in that: During the casting cycle, the viscosity of the glass liquid in the nozzle (6) is 20-200 Pa.S.

12. A control method according to claim 8, characterized in that: The viscosity of the glass liquid in the material channel (1) is 200-500 Pa.S.

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