JP2012072045A - Device and method for heating glass bottle and method of manufacturing glass bottle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device and a method for heating a glass bottle which can reduce occurrence of rejects of glass bottles on switching the item of products and suppress the cost of production control and a method of manufacturing a glass bottle.SOLUTION: The heating device 1 for glass bottles is used to heat the bottle mouth 51 of a glass bottle 50 at a predetermined temperature and includes a high-frequency power source, an induction heating element 6 arranged in the vicinity of the bottle mouth 51, an induction heating coil 7 generating an induced magnetic field, when a high-frequency electric current is supplied by the high-frequency power source, so as for the induction heating element 6 to generate heat and a controller controlling the heating condition of the induction heating element 6. It heats the bottle mouth 51 of the glass bottle 50 by causing the induction heating element 6 to generate heat.

Description

  The present invention relates to a heating device for heating a heated portion of a glass bottle at a predetermined temperature, a heating method using the heating device, and a method for manufacturing a glass bottle.

  In general, in the manufacturing process of a glass bottle, after forming a glass material in a molten state with a mold, for example, by reheating the bottle mouth part that is a part of the glass bottle that is a molded product with a heating device, Elimination of fine protrusions and the like formed during molding is performed. At that time, over-burning, uneven burning, unburned residue, and whitening due to a protective coating existing on the surface of the glass bottle may occur. In order to suppress such a whitening phenomenon when the bottle opening is reheated (mouth baking), for example, in Patent Document 1, a heating device having a burner head is used. In this heating device, a burner head is arranged above the bottle mouth part, flame radiated from a burner holder provided on the burner head is applied to the bottle mouth part, and the bottle mouth part is heated and baked. The And, since the flame outlet of the burner holder is formed along the axial direction, the radiated flame is not diffused at the bottle mouth portion, and it is prevented from excessively hitting a part of the bottle mouth portion. ing.

JP 2002-115819 A

  In the heating device using the burner of Patent Document 1, when the type of glass bottle is changed and the mold or other equipment is changed, the strength of the flame is adjusted each time and the bottle mouth is reheated. The heating strength to be used is in accordance with the shape of the bottle opening. When the strength of the flame is adjusted, it is not possible to inspect the baked degree until the heated mouth is cooled. For this reason, many discarded glass bottles are generated by the time the above-described adjustment work accompanying the product change is completed.

  On the other hand, if the mixing ratio of the gas introduced into the radiant port of the flame changes even slightly or the radiant port becomes clogged, a uniform flame cannot be obtained and the heating state changes. When the heating state fluctuates, appearance defects due to the above-mentioned over-burning, uneven burning, and unburned residue of the plurality of glass bottles passed through the heating process occur, and the quality of the glass bottles varies. In other words, in order to suppress the variation in quality, it is necessary to constantly monitor the gas mixture ratio, the contamination of the flame outlet, etc., and there is a problem that the manufacturing management cost increases accordingly.

  Therefore, in view of the problems of the prior art described above, the present invention reduces the occurrence of discarded glass bottles due to product change, and at the same time, suppresses manufacturing management costs, and a glass bottle heating apparatus and method, and It aims at providing the manufacturing method of a glass bottle.

In order to achieve the above object, the following technical measures were taken.
That is, the glass bottle heating device of the present invention is a glass bottle heating device for heating the heated portion of the glass bottle at a predetermined temperature, and is provided in the vicinity of the high-frequency power source and the heated portion of the glass bottle. An induction heating element arranged; an induction heating coil for generating an induction magnetic field by supplying a high-frequency current from the high-frequency power supply unit to generate heat in the induction heating element; and a control unit for controlling a heating state of the induction heating element And the heated portion is heated by causing the induction heating element to generate heat.

  According to the glass bottle heating device of the present invention, since the heated portion of the glass bottle is heated by causing the induction heating element to generate heat with the induction heating coil, the degree of heating of the heated portion is confirmed during heating. The heating intensity can be adjusted by changing the amount of current according to the degree of heating. That is, the heating intensity can be adjusted even after the heated part is not cooled. Thus, it is easy to adjust the heating intensity. Therefore, the adjustment work of the heating intensity accompanying the product change can be completed at an early stage, and the generation of discarded products of glass bottles can be suppressed. In addition, since the heated portion of the glass bottle is heated by causing the induction heating element to generate heat with the induction heating coil, the heating state in the heated portion is unlikely to fluctuate. For example, a plurality of glasses passed through the heating process Appearance defects due to over-burning, uneven burning, and unburned residue at the bottle mouth are unlikely to occur. Therefore, the management work for suppressing the dispersion | variation in the quality of a glass bottle reduces, and the cost of manufacturing management can be held down.

  The glass bottle heating device of the present invention is used for heating all parts of a glass bottle, and can be applied to, for example, scalloping with a heated portion as a bottle mouth portion of a glass bottle. When the induction heating element is disposed in a state of being spaced apart from the bottle mouth portion of the glass bottle as the heated portion by a predetermined distance in the axial direction when applied to the mouth baking, only the bottle mouth portion is heated. It is possible to prevent the portions other than the bottle mouth from being burned. Furthermore, when the glass bottle and the induction heating element are positioned with respect to each other, the glass bottle and the induction heating element do not interfere with each other. Therefore, it is not necessary to stop the glass bottle being transferred, and the production efficiency can be improved.

  It is preferable that the induction heating element is arranged along a direction in which the plurality of glass bottles are sequentially flowed on the production line. In this case, the heated parts of the plurality of glass bottles can be heated by the heat generated by the induction heating element while transferring the plurality of glass bottles.

  The glass bottle heating method of the present invention is a glass bottle heating method for heating a heated portion of the glass bottle at a predetermined temperature, and an induction heating element disposed in the vicinity of the heated portion of the glass bottle is provided with a high-frequency wave. The heated portion is indirectly heated by generating heat with an induction heating coil that generates an induction magnetic field when supplied with an electric current.

  According to the heating method of the glass bottle of the present invention, the heated portion is indirectly heated by causing the induction heating element arranged near the heated portion of the glass bottle to generate heat with the induction heating coil. The heating degree of the heated part can be confirmed during the heating, and the heating intensity can be adjusted by changing the amount of current or the like according to the heating degree. That is, the heating intensity can be adjusted even after the heated part is not cooled. Thus, it is easy to adjust the heating intensity. Therefore, the adjustment work of the heating intensity accompanying the product change can be completed at an early stage, and the generation of discarded products of glass bottles can be suppressed. Further, since the heated portion of the glass bottle is indirectly heated by causing the induction heating element to generate heat with the induction heating coil, the heating state in the heated portion is unlikely to fluctuate. Appearance defects due to over-burning, uneven burning, and unburned residue at the mouth of multiple glass bottles are unlikely to occur. Therefore, the management work for suppressing the dispersion | variation in the quality of a glass bottle reduces, and the cost of manufacturing management can be held down.

  The glass bottle manufacturing method of the present invention includes the following steps (a) to (c) (however, steps (b) and (c) are interchangeable in order). It is a manufacturing method. (A) Molding step for obtaining a glass product with a bottle shape by molding molten glass with a molding die (b) An induction heating element arranged in the vicinity of the heated part of the glass product is supplied with a high-frequency current. A heating step of heating the heated portion by generating heat with an induction heating coil that generates an induction magnetic field (c) A slow cooling step of gradually cooling the glass molded article

  According to the method for manufacturing a glass bottle of the present invention, the heated portion is heated by causing the induction heating coil disposed near the heated portion of the glass molded product to generate heat with the induction heating coil. The heating degree of the heated part can be confirmed inside, and the heating intensity can be adjusted by changing the amount of current according to the heating degree. That is, the heating intensity can be adjusted even after the heated part is not cooled. Thus, it is easy to adjust the heating intensity. Therefore, the adjustment work of the heating intensity accompanying the product change can be completed at an early stage, and the generation of discarded products of glass bottles can be suppressed. In addition, since the heated part of the glass molded product is heated by causing the induction heating element to generate heat with the induction heating coil, the heating state in the heated part is unlikely to fluctuate. Appearance defects due to over-burning, uneven burning, and unburned residue at the mouth of glass bottles are unlikely to occur. Therefore, the management work for suppressing the dispersion | variation in the quality of a glass bottle reduces, and the cost of manufacturing management can be held down.

  It is preferable to heat the heated portion while sequentially transferring the plurality of glass molded products by carrying out the heating step on a transfer means for sequentially transferring the plurality of glass molded products after the molding step. . If the heated part can be heated while sequentially transferring a plurality of glass molded products, the production line can be shortened and the production cost can be reduced.

  It is preferable that the induction heating element is disposed in a state of being spaced apart from a plurality of glass molding product bottle openings as a plurality of the heated parts at a predetermined interval in the axial direction. In this case, only the bottle mouth part can be heated, and it can prevent that parts other than the said bottle mouth part burn. Further, when the glass molded product and the induction heating element are positioned relative to each other, the glass molded product and the induction heating element do not interfere with each other, and for example, there is no need to temporarily stop the glass molded product being transferred. Thereby, production efficiency can be improved.

  When it is set as the manufacturing method of the glass bottle which further includes the coating process which coats the surface of the said glass molded article, it is preferable to implement the said formation process, the said coating process, the said heating process, and the said slow cooling process in this order. By performing the heating step after the coating step, for example, the coating of the bottle mouth portion as a heated portion of the glass molded product is removed, and there is a problem due to a reaction occurring between the coating component and the metal component of the plug member. Can be prevented.

  As described above, according to the present invention, it is easy to adjust the heating intensity. Therefore, the adjustment of the heating intensity associated with the product change can be completed at an early stage, and the generation of discarded glass bottles can be suppressed. In addition, the heating state in the heated portion is unlikely to fluctuate, and the management work for suppressing the variation in the quality of the glass bottle is reduced, so that the manufacturing management cost can be reduced.

It is an arrangement drawing showing the outline of the heating device of the glass bottle concerning one embodiment of the present invention. It is a front view showing the outline | summary of the heating apparatus of a glass bottle. It is sectional drawing of the principal part of the heating apparatus of a glass bottle. It is the perspective view which looked at the principal part shown in FIG. 3 from the downward direction. It is the schematic of the manufacturing line for demonstrating the manufacturing method of the glass bottle which concerns on one Embodiment of this invention. It is a schematic perspective view of the heating apparatus of a glass bottle in a manufacturing line, and its periphery. It is the graph which compared the inspection result of the mouth-cooking implemented with the heating apparatus of the glass bottle, and the inspection result of the mouth-cooking implemented with the heating apparatus of the conventional glass bottle. It is the graph which compared the inspection result of the mouth-cooking implemented with the heating apparatus of the glass bottle in the other site | part of a bottle mouth part, and the inspection result of the mouth-cooking implemented with the heating apparatus of the conventional glass bottle.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a layout view showing an outline of a glass bottle heating apparatus 1 according to an embodiment of the present invention, and FIG. 2 is a front view showing an outline of the glass bottle heating apparatus 1. The glass bottle heating device 1 of the present embodiment is configured to heat the bottle mouth part 51 which is a heated part of the glass bottle 50 to perform mouth-cooking. It is mainly composed of a heating unit 3 located in the vicinity of the high-frequency power supply unit 2, a cooling unit 4 that introduces cooling water into the heating unit 3, and a control unit 5 that controls the state of the heating unit 3. Among them, the heating unit 3 includes an induction heating element 6 disposed in the vicinity of the glass bottle 50, an induction heating coil 7 that generates an induction magnetic field, and the induction heating element 6, the induction heating coil 7, and the like. A gantry 8 is provided.

  The high frequency power supply unit 2 includes a power board 9 and an oscillator 10 electrically connected to the power board 9, and a high frequency current having a predetermined frequency is supplied from the oscillator 10 to the induction heating coil 7 of the heating unit 3. It has become so. The control unit 5 is provided integrally with the power supply panel 9 and controls a high-frequency current flowing from the oscillator 10. The power supply panel 9 is provided with a display unit 11 and the like for confirming the control state, and is connected to a power supply (not shown). The cooling unit 4 includes a water tank 12 in which cooling water is stored, a pump 13 that circulates the cooling water in the water tank 12, and a pipe 14 that circulates the cooling water between the water tank 12 and the heating unit 3. Has been.

  FIG. 3 is a cross-sectional view of the heating unit 3, which is a main part of the glass bottle heating device 1, and FIG. 4 is a perspective view of the heating unit 3 as viewed from below. The induction heating coil 7 and the glass bottle 50 of FIG. In the following description, the sides corresponding to the front and back of FIG. 3 are front and back, respectively, and the sides corresponding to the top and bottom of FIG. The gantry 8 has a U-shaped cross section composed of a horizontally long bottom 81 and a side wall 82 extending downward from its front and rear ends, and is fixed in a state of surrounding the upper portion of the glass bottle 50 with a fixing member (not shown). A plurality of openings 81 a for exposing the induction heating element 6 to the lower side are formed at the center in the front-rear direction of the bottom 81. The opening 81a is provided with an annular heat insulating material 32 for making it difficult for the heat generated by the induction heating element 6 to escape to the gantry 8. The upper part of the heat insulating material 32 has a stepped shape, and a receiving portion 32a for fixing the induction heating element 6 is formed. An annular positioning member 33 for positioning the induction heating coil 7 is provided around each opening 81 a inside the bottom 81. A plurality of glass bottles 50 are placed on a transfer mechanism 35 such as a conveyor system, and are transferred one after another directly below each opening 81a where the induction heating element 6 is exposed.

  As the induction heating element 6, a known heating element made of a conductive material that can generate heat by an induction magnetic field can be applied. For example, a heating element made of various metals such as aluminum and stainless steel, or conductive powder such as metal and carbon. And a heating element made of a ceramic composite material in which a ceramic such as silicon carbide or boron carbide is mixed with conductive fibers, a heating element provided with a sprayed metal layer, and the like. Among these, the ceramic composite material is preferably used because it has both the conductivity of the conductive material and the high thermal shock resistance of the ceramic, transmits heat quickly, and does not change its shape at high temperatures.

  The induction heating element 6 is formed in a disk shape having a diameter of 50 mm larger than the bottle mouth part 51 of the glass bottle 50. The induction heating element 6 is fixed to the receiving portion 32a of the heat insulating material 32 provided in the opening 81a with a predetermined interval from the bottle mouth portion 51 in the vertical direction (axial direction). The glass bottle 50 is placed in a state where the top surface 51a is slightly spaced downward from the lower surface 6a of the induction heating element 6 so that the bottle mouth portion 51 does not interfere with the bottom portion 81 during transfer. The distance between the induction heating element 6 and the top surface 51 a of the bottle opening 51 is such that the bottle opening 51 can be sufficiently heated by the heat generated by the induction heating element 6. A thermocouple 20 for detecting temperature is connected to the induction heating element 6.

  The induction heating coil 7 is fixed in the positioning member 33 provided on the bottom 81 in a state of covering the induction heating element 6. The induction heating coil 7 is a solenoid type made of a metal tubular material, and both ends of the induction heating coil 7 are electrically connected to an oscillator 10 so that a high frequency current having a predetermined frequency is supplied to the induction heating coil 7. Supplied. The piping 14 of the cooling unit 4 has a water pipe 21 for cooling the induction heating coil 7 along the induction heating coil 7. The induction heating coil 7 and the water pipe 21 of the present embodiment are covered with the same tubular cover 22 and are integrated together.

  Between the oscillator 10 and the induction heating coil 7, a current detection unit (not shown) that detects the current flowing through the induction heating coil 7 is provided, and the control unit 5 detects the induction detected by the thermocouple 20. The heat generation state of the induction heating element 6 is controlled by adjusting the high-frequency current from the high-frequency power supply unit 2 according to the heat generation temperature of the heating element 6, the current detected by the current detection unit, and the like.

  When a high frequency current corresponding to a preset heating temperature is supplied from the high frequency power supply unit 2 to the induction heating coil 7, an induction magnetic field is generated in the induction heating coil 7. This induction magnetic field generates an induction current in the induction heating element 6. In the induction heating element 6, Joule heat is generated by the induced current generated in the induction heating element 6 and the electrical resistance of the induction heating element 6, and this Joule heat is transmitted to the bottle mouth 51 of the glass bottle 50. The bottle mouth part 51 is heated to a predetermined temperature, and the bottle mouth part 51 is baked.

  According to the glass bottle heating device 1 of the present embodiment, the induction heating element 6 is heated by the induction heating coil 7 to heat the bottle mouth portion 51 (heated portion) of the glass bottle 50. In addition, the heating intensity of the bottle opening 51 can be confirmed, and the heating intensity can be adjusted by changing the amount of current or the like according to the heating degree. That is, the heating intensity can be adjusted even after the bottle opening 51 is not cooled. Thus, it is easy to adjust the heating intensity. Therefore, the adjustment work of the heating intensity accompanying the product change can be completed at an early stage, and generation of discarded products of the glass bottle 50 can be suppressed. Further, since the induction heating element 6 is heated by the induction heating coil 7, the bottle opening 51 of the glass bottle 50 is heated, so that the heating state of the bottle opening 51 is not easily changed. Appearance defects due to over-burning, uneven burning, and unburned portions of a plurality of glass bottles are hardly caused. Therefore, the management work for suppressing the dispersion | variation in the quality of a glass bottle reduces, and the cost of manufacturing management can be held down.

  With the glass bottle heating device 1 of the above embodiment, the following glass bottle heating method can be realized. That is, a heating method of a glass bottle that heats the bottle mouth part 51 (heated part) of the glass bottle 50 at a predetermined temperature, and the induction heating element 6 arranged in the vicinity of the bottle mouth part 51 is supplied with high-frequency current. The bottle opening 51 of the glass bottle 50 is indirectly heated by generating heat with the induction heating coil 7 that generates an induction magnetic field.

  According to the heating method of the glass bottle, the induction heating element 6 disposed in the vicinity of the bottle opening 51 (heated part) is caused to generate heat by the induction heating coil 7 so that the bottle opening 51 is indirectly connected. Since it is heated, the heating degree of the bottle opening 51 can be confirmed during heating, and the heating intensity can be adjusted by changing the amount of current according to the heating degree. That is, the heating intensity can be adjusted even after the bottle opening 51 is not cooled. Thus, it is easy to adjust the heating intensity. Therefore, the adjustment work of the heating intensity accompanying the product change can be completed at an early stage, and the generation of discarded products of glass bottles can be suppressed. In addition, since the heating part 6 of the glass bottle 50 is indirectly heated by causing the induction heating element 6 to generate heat with the induction heating coil 7, the heating state of the bottle opening part 51 is not easily changed. Appearance defects due to over-burning, uneven burning, and unburned portions of the mouth portions of a plurality of glass bottles that have been passed through the process are unlikely to occur. Therefore, the management work for suppressing the dispersion | variation in the quality of a glass bottle reduces, and the cost of manufacturing management can be held down.

  FIG. 5 is a schematic view of a production line 40 for explaining a method for producing a glass bottle according to an embodiment of the present invention, and FIG. 6 shows the glass bottle heating device 1 and its surroundings in the production line 40. It is a schematic perspective view. In the production line 40, the glass bottle heating device 1 of the above-described embodiment is incorporated. The glass bottle manufacturing method according to the present embodiment includes a molding step of forming molten glass with a molding die (not shown) to obtain a bottle-shaped glass molded product (glass bottle) 50, and a protective coating is applied to the surface of the glass molded product 50. A plurality of induction heating elements 6 disposed in the vicinity of the bottle mouth part 51 as a heated part of the glass molded product 50 and the coating process are supplied with a plurality of induction heating coils 7 that are supplied with a high-frequency current and generate an induction magnetic field. By generating heat, a heating process for heating the bottle opening 51 and a slow cooling process for gradually cooling the glass molded product 50 are performed in this order.

  The production line 40 is provided with a molding device 43 for performing a molding process, and the molding device 43 has a conveyor system as a transfer mechanism for continuously transferring a plurality of glass molded products 50. 35 are connected. Moreover, the coating apparatus 45 for implementing a coating process, the glass bottle heating apparatus 1 for implementing a heating process, and a slow cooling process are implemented along the transfer direction of the several glass molded product 50 by the conveyor system 35. A slow cooling device 46 is installed in this order. Thereby, the process in each process is given to the said several glass molded product 50, transferring the several glass molded product 50 continuously.

  In the molding process of obtaining the bottle-shaped glass molded product 50, the molten glass is press-molded with a rough mold (not shown) to form a parison, and this is blown with a finishing mold (not shown), or the molten glass is not shown. Blow-and-blow molding is performed by a mold to form a parison, which is then blow-molded again by a finishing mold (not shown) by the molding apparatus 43, and a plurality of glass molded products 50 are continuously molded.

  The glass molded product 50 molded by the molding device 43 is transferred to the next coating process on the conveyor system 35, and a protective coating is deposited on the surface of the glass molded product 50 by the coating device 45. By depositing a protective coating, a protective film is formed on the surface of the glass bottle, which is a product, to prevent scratches and the like, and to suppress the strength reduction caused by the scratches.

  The plurality of glass molded products 50 exiting the coating device 45 are transferred to the next heating step on the conveyor system 35, and the glass bottle heating device 1 baked the bottle mouth portions 51 of the plurality of glass molded products 50. Is done. The glass bottle heating apparatus 1 includes a heating unit 3, a high-frequency power supply unit (not shown), a cooling unit, and a control unit that are installed in the vicinity of the heating unit 3. As described above, a plurality of induction heating elements 6 disposed in the vicinity of the bottle mouth portion 51 as a heated portion of the plurality of glass molded products 50, a high-frequency current is supplied from a high-frequency power supply unit, and an induction magnetic field is generated to generate a plurality of inductions. A plurality of induction heating coils 7 for generating heat from the heating element 6 are provided. With such a glass bottle heating device 1, the plurality of induction heating elements 6 are heated by the plurality of induction heating coils 7, whereby the bottle mouth portions 51 of the plurality of glass molded products 50 are simultaneously heated. The bottle mouth 51 of the glass molded product 50 that has entered the heating unit 3 continues to be heated until it exits the heating unit 3.

  The plurality of induction heating elements 6 provided in the glass bottle heating device 1 are arranged along the direction in which the glass molded products 50 are sequentially flowed by the conveyor system 35. Therefore, while sequentially transferring the plurality of glass molded products 50, the bottle mouth portions 51 of the plurality of glass molded products 50 can be heated by the heat generated by the plurality of induction heating elements 6, thereby performing the mouth baking. Further, the plurality of induction heating elements 6 are arranged in a state of being spaced apart from the bottle mouth portions 51 of the plurality of glass molded products 50 in the vertical direction. Thereby, only the some bottle opening part 51 can be heated, and it can prevent that parts other than the said some bottle opening part 51 burn. Furthermore, when the glass molded product 50 and the induction heating element 6 are positioned at a predetermined position, the glass molded article 50 and the induction heating element 6 do not interfere with each other. In other words, the plurality of glass molded products 50 that are successively transferred by the conveyor system 35 do not interfere with the plurality of induction heating elements 6. Therefore, there is no need to temporarily stop the plurality of glass molded products 50 being transferred, and the production efficiency can be improved. Further, by performing the heating process on the conveyor system 35 for sequentially transferring the plurality of glass molded products 50 after the molding process, the plurality of glass molded products 50 are baked while being sequentially transferred. The production line is shortened and the production cost can be reduced.

  The glass molded product 50 exiting the glass bottle heating device 1 is transferred to the next slow cooling process on the conveyor system 35 and is slowly cooled by the slow cooling device 46. By carrying out the molding process, the coating process, the heating process, and the slow cooling process in this order, the glass mold product 50 is subjected to protective coating, and then the mouth-opening 51 of the glass mold product 50 is performed. The protective coating is removed. Thereby, the malfunction by the reaction which arises between the coating component of a protective coating and the metal component of the stopper member which is not shown attached to the bottle mouth part 51 can be prevented.

  According to the glass bottle manufacturing method of the present embodiment, the induction heating element 6 disposed in the vicinity of the bottle mouth portion 51 (heated portion) of the glass molded product 50 is caused to generate heat by the induction heating coil 7. Since the bottle opening 51 is heated, the heating degree of the bottle opening 51 can be confirmed during heating, and the heating intensity can be adjusted by changing the amount of current or the like according to the heating degree. That is, the heating intensity can be adjusted even after the bottle opening 51 is not cooled. Thus, it is easy to adjust the heating intensity. Therefore, the adjustment work of the heating intensity accompanying the product change can be completed at an early stage, and the generation of discarded products of glass bottles can be suppressed. In addition, since the heating part 6 of the glass molded product 50 is heated by causing the induction heating element 6 to generate heat with the induction heating coil 7, the heating state in the bottle opening part 51 is unlikely to fluctuate and is passed through the heating process. Further, poor appearance due to over-burning, uneven burning, and unburned portions of the bottle mouth portions 51 of the plurality of glass molded products 50 is unlikely to occur. Therefore, the management work for suppressing the dispersion | variation in the quality of a glass bottle reduces, and the cost of manufacturing management can be held down.

  Hereinafter, the present invention will be specifically described, but the present invention is not limited to these specific examples. The beer bottle was baked for several days every 4 varieties. The heating intensity was adjusted at any time to suppress the appearance defects due to over-burning, burning unevenness, and unburned residue at the bottle mouth, and the occurrence of whitening was inspected with a commercially available appearance inspection machine. In Examples 1 to 4, the glass bottle heating device 1 of the production line 40 shown in FIG. 5 was used to perform baked at a set temperature of 1150 ° C., and in Comparative Examples 1 to 4, a conventional burner was used. Using a glass bottle heating device, baked at a set temperature of 1150 ° C. The molds and other equipment at the time of each type change were the same in Example 1 and Comparative Example 1, Example 2 and Comparative Example 2, Example 3 and Comparative Example 3, Example 4 and Comparative Example 4, and each time The varietal change and the accompanying baked rice were performed in Example 1 and Comparative Example 1, Example 2 and Comparative Example 2, Example 3 and Comparative Example 3, Example 4 and Comparative Example 4 on the same schedule.

  Example 1: In the first variety change, 100 pieces of baked rice were performed for 12 days a day. Example 2: In the second variety change, 100 pieces of baked rice were performed for 15 days a day. Example 3 In the third variety change, 100 pieces of baked rice were performed for 15 days a day. Example 4 In the fourth variety change, 100 pieces of mouth-cooked per day were performed for 18 days.

  Comparative Example 1: In the first variety change, 100 pieces of mouth-cooked per day were performed for 12 days. Example 2: In the second variety change, 100 pieces of baked rice were performed for 15 days a day. Example 3 In the third variety change, 100 pieces of baked rice were performed for 15 days a day. Example 4 In the fourth variety change, 100 pieces of mouth-cooked per day were performed for 18 days.

  Table 1 shows the whitening removal rate of beer bottles calculated on the day of changing varieties and all the days in Examples 1 to 4 and Comparative Examples 1 to 4 (occurrence rate of discarded products until the adjustment of the heating intensity is completed). Show.

  From Table 1, each example baked by the glass bottle heating device 1 of the above embodiment is the same as that of each comparative example and all the comparative examples that were baked by the glass bottle heating device using a conventional burner. It can be seen that the whitening removal rate on the day is low.

  In FIG. 7, the measurement result of the internal diameter (small diameter part upper side) of the bottle mouth part after mouth baking in Examples 1-4 and Comparative Examples 1-4 is represented, FIG. 8 shows Examples 1-4 and Comparative Example 1. The measurement result of the inner diameter (bottom side of a small diameter part) of the bottle mouth part after baked in -4 is represented. The square mark on the vertical axis in FIGS. 7 and 8 is the median value of the standard. 7 and 8, each of the examples baked by the glass bottle heating device 1 of the above embodiment is closer to the standard value than each comparative example baked by the glass bottle heating device using a conventional burner. It can be seen that the variation in quality has decreased.

  The glass bottle heating apparatus and heating method and the glass bottle manufacturing method according to the embodiments and examples disclosed above show an example of the glass bottle heating apparatus and heating method and the glass bottle manufacturing method according to the present invention. If the heated part of the glass bottle can be heated indirectly via an induction heating element, the material and shape of the induction heating element, the configuration of the high frequency power supply, the material and shape of the induction heating coil, etc. It can be changed as appropriate. Further, the glass bottle that is the object to be heated may have any form, and the heated portion of the glass bottle may be any part. Each process of the manufacturing method of a glass bottle may be replaced, and a to-be-heated part may be heated in the state which arranged the glass bottle in several rows with the conveyor system. The number, arrangement, and installation interval of the induction heating elements and induction heating coils provided in the glass bottle heating device can be appropriately changed according to the heating conditions. A heat insulator may be provided around the mouth portion of the glass bottle so that the heat generated by the induction heating element can be efficiently transmitted to the mouth portion. For example, in the case where such a heat insulating material is provided in the glass bottle heating device of the present invention installed in the production line, it may be installed so as not to disturb the transfer of the glass bottle. In addition, the configuration and arrangement of each member and each device may be changed according to the production line. You may provide the raising / lowering mechanism which raises / lowers a glass bottle or a heating unit, and makes a bottle opening part and an induction heating body approach and separate mutually. The scope of the present invention is defined by the terms of the claims, and the scope of the invention includes all modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1 Glass bottle heating apparatus 2 High frequency power supply part 3 Heating unit 4 Cooling part 5 Control part 6 Induction heating element 7 Induction heating coil 8 Mounting frame 81 Bottom part 81a Opening part 9 Power supply panel 10 Oscillator 35 Transfer mechanism, conveyor system 40 Production line 43 Molding Equipment 45 Coating equipment 46 Slow cooling equipment 50 Glass bottles and glass molded parts 51 Bottle mouths

Claims (8)

A glass bottle heating device for heating a heated portion of a glass bottle at a predetermined temperature,
A high-frequency power supply unit; an induction heating element disposed in the vicinity of the heated portion of the glass bottle; and an induction heating coil that generates a induction magnetic field by supplying a high-frequency current from the high-frequency power supply unit to generate heat from the induction heating element. A control unit for controlling the heat generation state of the induction heating element,
An apparatus for heating a glass bottle, wherein the heated portion is heated by causing the induction heating element to generate heat.   The glass bottle heating device according to claim 1, wherein the induction heating element is arranged in a state of being spaced apart from a bottle mouth portion of the glass bottle as the heated portion in the axial direction. .   The glass bottle heating device according to claim 1 or 2, wherein the induction heating element is arranged along a direction in which a plurality of the glass bottles are sequentially flowed on a production line. A glass bottle heating method for heating a heated portion of a glass bottle at a predetermined temperature,
The induction heating element disposed in the vicinity of the heated part of the glass bottle is heated by an induction heating coil that is supplied with a high-frequency current and generates an induction magnetic field, thereby indirectly heating the heated part. The heating method of the glass bottle characterized. The manufacturing method of the glass bottle characterized by including the following process (a)-(c) (however, the order of process (b) and (c) is interchangeable).
(A) Molding step for obtaining a glass product with a bottle shape by molding molten glass with a molding die (b) An induction heating element arranged in the vicinity of the heated part of the glass product is supplied with a high-frequency current. A heating step of heating the heated portion by generating heat with an induction heating coil that generates an induction magnetic field (c) A slow cooling step of gradually cooling the glass molded article   The heated portion is heated while sequentially transferring the plurality of glass molded products by carrying out the heating step on a transfer means for sequentially transferring the plurality of glass molded products after the molding step. The manufacturing method of the glass bottle of Claim 5.   The said induction heating element is arrange | positioned in the state which left the predetermined | prescribed space | interval in the axial direction with the several opening part of the said glass molded product as said several to-be-heated part. The manufacturing method of the glass bottle of description.   6. A coating process for coating the surface of the glass molded article is further included, and the molding process, the coating process, the heating process, and the slow cooling process are performed in this order. 8. A method for producing a glass bottle according to any one of 7 above.

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