JP2590135Y2 - Glass bottle hot coating equipment - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-coating apparatus for a glass bottle, and more particularly to a hot-coating apparatus for a glass bottle which performs hot coating on a top surface in addition to a body of the glass bottle.

[0002]

2. Description of the Related Art In recent years, glass bottles have been subjected to a surface treatment for forming a metal oxide film or an organic film on the surface of the glass bottle in order to strengthen the glass bottle and prevent the glass bottle from being damaged.
This surface treatment is roughly classified into so-called hot coating performed during the period from bottle production to slow cooling and cold coating performed after slow cooling.

[0003] Hot coating and cold coating are performed repeatedly to sufficiently strengthen the glass bottle. This is dual coating.

[0004] Hot coating is a method for bonding aluminum foil to the mouth of a glass bottle by sealing.
It is also used to coat an organic film for bonding, for example, a tin film.

Conventionally, to perform hot coating on the outer surface of the body of a glass bottle and the top surface of a mouth, a deposition source gas is blown from the inner surface of one side wall of a constant temperature chamber surrounding the hot coating line to the other side wall. However, a device having a gas circulating means for sucking and circulating the gas from the inner surface of the other side wall and an exhaust means for evacuating the upper part of the constant temperature chamber is used.

[0006] As a result, a flow of the evaporation source gas which flows around the upper portion of the mouth of the glass bottle is generated, so that hot coating can be performed on the top surface of the mouth at the same time as the body of the glass bottle.

Incidentally, the hot coating film formed on the top surface of the mouth of the glass bottle is intermolecularly bonded by a thermal reaction with a polyethylene film or the like laminated on the back surface of the aluminum foil, and the aluminum foil and the mouth of the mouth of the glass bottle are bonded. It is intended to adhere to the top surface. In order to achieve this with appropriate strength, it is necessary to set the thickness of the hot coating film accurately.

For this reason, conventionally, in order to adjust the thickness of the hot coating film, the amount of the chemical in the vapor source gas and the flow rate of the air used for diluting the chemical are changed.

[0009]

[Problem to be solved by the invention] However, as in the past,
Adjusting the amount of the chemical solution and the flow rate of the dilution air is difficult to accurately reflect on the thickness of the hot coating film to be formed and is not stable, so it takes a long time to adjust the glass bottle. The flow of the evaporation source gas flowing around the top surface of the mouth cannot be controlled, and it is difficult to form a uniform film thickness, and sufficient accuracy cannot be obtained.

It is an object of the present invention to provide a hot-coating apparatus for glass bottles which can solve such a problem.

[0011]

According to the present invention, in order to achieve the above-mentioned object, an evaporation source gas is blown from the inner surface of one side wall of a constant temperature chamber surrounding a predetermined range of a hot coating line toward the other side wall. However, in a glass bottle hot coating apparatus having gas circulating means for sucking and evacuating this from the inner surface of the other side wall and evacuating means for evacuating the upper part of the constant temperature chamber, the opening of the glass bottle flowing through the hot coating line A fan that forms a horizontal vortex at this height position, and a control unit that controls the number of revolutions of the fan is provided.

It is preferable that the control means performs inverter control, and the exhaust means has an exhaust port for sucking and exhausting from a position on the inner surface of the side wall which is slightly higher than the installation height of the fan in the constant temperature chamber. Is preferred.

[0013]

According to the above construction of the present invention, a predetermined range of the hot coating line is surrounded by the constant temperature chamber, and the gas circulating means blows out the deposition source gas from the inner surface of one of the side walls toward the other side wall. By evacuating and circulating from the inner surface of the side wall, a vapor source gas flow is formed in the constant temperature atmosphere so as to cross the hot coating line, and the vapor source gas flow in the constant temperature atmosphere flows through the hot coating line into a glass bottle. Since the organic component in the evaporation source gas is vapor-deposited on the outer surface of the body of the glass bottle by traversing the body of the glass bottle, a hot coating film is formed on the outer surface of the body of the glass bottle. Can be.

On the other hand, an evacuation action by the exhaust means works on the upper part of the constant temperature chamber to generate an ascending airflow toward the upper part of the constant temperature chamber in a part of the vapor flow of the evaporation source gas in the constant temperature chamber. Immediately above the mouth of the flowing glass bottle, a fan is located, so that the ascending vapor source gas flow is involved and comes into planar contact with the top surface of the mouth of the bottle as a horizontal vortex, On this top surface, a hot coating film can be formed with a stable film thickness according to the strength and spread of the vortex.

The number of revolutions of the fan is controlled by the control means, so that the intensity and spread of the vortex can be adjusted.

In this case, if the control means controls the inverter, the number of revolutions of the fan is freely adjusted,
The strength and extent of the horizontal vortex can be set in any way and can be stabilized.

If an exhaust port of the exhaust means for performing suction and exhaust from the constant temperature chamber is opened at a position slightly above the position of the fan on the side wall of the constant temperature chamber, the eddy current is reduced by one of the evaporation source gas flow. Entraining the ascending flow of the part and diverting the entrained gas flow so as to be discharged from the exhaust port,
It is possible to achieve a well-balanced state without the turbulence of the vortex, and to constantly contact the vapor deposition source gas with a predetermined concentration with the top surface of the mouth of the glass bottle.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example of a hot coating apparatus to which the present invention is applied will be described below in detail with reference to the drawings.

FIG. 1 is a plan view schematically showing a bottle production line. As shown in the figure, the first conveyor line 1
A bottle forming machine 2 and a hot coating apparatus 3 are provided, and an annealing furnace 5 is provided on a first conveyor line 1 and on a second conveyor line 4 which follows at a right angle thereto.

The forming machine 2 has a large number of forming sections, and the glass bottles formed in each section are sent to the first conveyor line 1 and sequentially sent to the hot coating apparatus 3.

In the hot coating apparatus 3, when a glass bottle still in a high temperature state immediately after molding passes, the glass bottle shown in FIG.
The metal oxide film is deposited by blowing a deposition source gas flow 20 as shown in FIG. 1 to improve the strength of the bottle and prevent scratches.

The glass bottles that have passed through the hot coating device 3 are transferred from the first conveyor 1 to the second conveyor 4, where they are sent to the lehr 5.

The glass bottles that have entered the annealing furnace 5 are subjected to a baking process in the first stage, and then are gradually cooled. The glass bottle after the slow cooling is subjected to a cold coating process (not shown), and the bottle making process is completed.

The hot coating apparatus 3 is shown in FIGS.
As shown in the figure, the predetermined range of the conveyor line 1 is
0, the glass bottles are sequentially fed into the temperature-controlled room 10, and hot coating is performed on a predetermined portion while passing through the temperature-controlled room 10, and the glass bottles after the hot coating are sequentially fed out.

An ejection unit 11 for ejecting an evaporation source gas is provided on one of both side walls of the constant temperature chamber 10, and a suction unit 12 for sucking and discharging the evaporation source gas is provided on the other side. I do.

The ejection unit 11 and the suction unit 1 are used for ejecting and evacuation of the evaporation source gas.
2 are connected to fans 13 and 14 before and after each,
The evaporation source gas flow 20 is formed while circulating the evaporation source gas through a duct (not shown).

The evaporation source gas is a secondary air obtained by mixing a chemical supplied from a chemical tank (not shown) with pressurized air as a carrier gas, and a primary air for diluting the secondary air to a predetermined concentration. Are mixed.

On the other hand, a fan 32 which is close to the top surface 31a of the mouth of the glass bottle 31 flowing through the first conveyor line 1 and forms a horizontal vortex at this height position, and controls the number of revolutions of this fan by means of an inverter. A control circuit 33 is provided.

According to the above configuration, a predetermined range of the first conveyor line 1 forming a hot coating line is surrounded by the constant temperature chamber 10, and the blowing unit 11 and the suction unit 12 move from the inner surface of one side wall to the other side wall. A vapor source gas is blown out toward the substrate, and the vapor source gas flow 20 which is sucked and exhausted from the inner surface of the other side wall and circulated is formed so as to cross the hot coating line in a constant temperature atmosphere.

As the body 31b of the glass bottle flowing through the hot coating line traverses the vapor source gas flow 20 in the constant temperature atmosphere, the outer surface of the body 31b of the glass bottle 31 has an organic component in the vapor source gas. Is deposited,
A hot coating film is formed.

In the upper part of the constant temperature chamber 10, a suction port 3 in the side wall is provided.
5, an exhaust action by an exhaust means (not shown) is working to generate an ascending airflow 20 a directed toward the upper part of the constant temperature chamber 10 in a part of the evaporation source gas flow 20 in the constant temperature chamber 10. Right above the mouth of the flowing glass bottle 31 is a fan 32,
The rising evaporation source gas flow 20a is rolled up and brought into horizontal contact with the top surface 31a of the mouth of the bottle 31 as a horizontal vortex 20b. It can be formed with a stable film thickness according to the spread.

The rotation speed of the fan 32 is controlled by the control circuit 33 so that the strength and spread of the eddy current 20b can be changed and stabilized, so that the stable hot coating film can be formed by the size of the glass bottle. High accuracy can be achieved as required, depending on the sheath shape and the like.

In particular, since the control circuit 33 controls the inverter, the rotational speed of the fan 32 can be freely adjusted to set the strength of the horizontal eddy current and the extent of the spread in any manner. , And the thickness of the hot coating film formed on the top surface of the mouth of the glass bottle can be formed more accurately.

Further, since the suction port 35 is opened at a position slightly above the position of the fan 32 on the side wall of the constant temperature chamber 10, the vortex 20b causes a part of the upward flow 20a of the deposition source gas flow 20 to flow. The entrainment and the divergence of the entrained gas flow to be discharged from the suction port 35 are achieved in a well-balanced manner without the turbulence of the vortex 20b, and the evaporation source gas having a predetermined concentration is constantly supplied to the glass bottle 31. Top surface 31 of the mouth
a, and the thickness accuracy of the hot coating film can be further improved.

Next, experimental examples performed by the present inventors will be described. The experiment was performed under the following conditions.

The specifications of the apparatus shown in FIG. 2 include the width b of the hot coating line and the body 31 b of the glass bottle 31.
The gap s between the glass bottle 31 and the blowing unit 11 and the suction unit 12 due to the difference from the diameter d
30 mm, the ratio of the diameter d of the body 31b of the glass bottle 31 to the diameter D of the fan 32 is d: D = 1: 0.6, and the glass bottle 3
The distance between the top surface 31a and the fan 32 was set to about 5 mm.

Gas supply amount and mixing ratio of vapor deposition source Primary air flow rate 18 l / min Secondary air flow rate 180 l / min Fan driven No driving First inverter control cycle (c / s) when fan 32 is controlled by control circuit 33 by inverter And torso 31b
As a result of examining the relationship with the thickness (CTU) of the hot coating film formed on the top surface 31a, the result was as shown in FIG.

The inverter control cycle is 50 (c / s)
The film thickness of the trunk portion 31b increases as the pressure increases, and the film thickness of the mouth top surface 31a becomes 20 (c) when the inverter control cycle is increased.
/ S).

The larger the film thickness of the body portion 31b is, the better. However, from the viewpoint of heating and bonding the aluminum foil to a predetermined strength,
The optimum conditions for forming the hot coating film on the top surface 31a at the mouth of the glass bottle 31 are about 8 to 23 (c / s). Available range is 43
(C / s).

The difference in the film thickness of each part between when the fan 32 is driven and when it is not driven is shown in the following table.

[0041]

[Table 1]

The following table shows a comparison between the film thickness obtained by the conventional apparatus and the film thickness obtained by the apparatus of this embodiment.

[0043]

[Table 2]

The comparison of the adhesive strength of the aluminum foil was as shown in the following table.

[0045]

[Table 3]

[0046]

According to the present invention, a hot coating film is formed on the body of a glass bottle crossing the hot coating line by a vapor source gas flowing across the hot coating line. The top of the top of the mouth of the bottle is raised as a horizontal vortex by a fan located just above the mouth of the glass bottle flowing through the hot coating line, as a part of the gas flow of the deposition source rises due to the exhaust to the upper part of the constant temperature chamber. , A hot coating film can be formed on the top surface with a stable film thickness in accordance with the strength and spread of the eddy current.

Further, by controlling the number of revolutions of the fan, the strength and spread of the eddy current are adjusted so that the formation of the stable hot coating film can be performed as required according to the size and shape of the glass bottle. High accuracy can be achieved.

In this case, if the control means controls the inverter, the number of revolutions of the fan is freely adjusted,
Since the strength and the degree of spread of the horizontal vortex can be set in any way and can be stabilized,
The thickness of the hot coating film formed on the top surface of the mouth of the glass bottle can be formed with higher accuracy.

Further, if the exhaust port of the exhaust means for performing suction and exhaust from the constant temperature chamber is opened at a position slightly above the position of the fan on the side wall of the constant temperature chamber, the eddy current may become one of the evaporation source gas flows. Entraining the ascending flow of the part and diverting the entrained gas flow so as to be discharged from the exhaust port,
Achieved in a well-balanced manner without the turbulence of the eddy current, and a vapor deposition source gas having a predetermined concentration is always brought into contact with the top surface of the mouth of the glass bottle, so that the hot coating film can be formed more stably as set. .

[Brief description of the drawings]

FIG. 1 is a plan view schematically showing a bottle manufacturing apparatus to which the present invention is applied.

FIG. 2 is a cross-sectional view of a hot coating line section in FIG.

FIG. 3 is a side view of the hot coating line section of FIG. 2;

FIG. 4 is a graph showing the relationship between the inverter control cycle of the fan and the thickness of the obtained hot coating film.

[Explanation of symbols]

 3 Hot Coating Apparatus 11 Spouting Unit 12 Suction Unit 20 Vapor Source Gas Flow 20a Upflow 20b Swirl 31 Glass Bottle 31a Top 31b Body 32 Fan 33 Control Circuit 35 Suction Port

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-247644 (JP, A) JP-A-3-205326 (JP, A) JP-A-5-193990 (JP, A) 22763 (JP, U) Japanese Utility Model Showa 53-65860 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C03C 17/245 C23C 14/08

Claims (3)

(57) [Scope of request for utility model registration] 1. A gas circulating means for injecting a deposition source gas from an inner surface of one side wall of a constant temperature chamber surrounding a predetermined range of a hot coating line toward the other side wall, and circulating the gas by suction and exhaust from the inner surface of the other side wall. A hot-coating apparatus for a glass bottle having an exhaust means for exhausting the upper part of the constant temperature chamber, wherein a fan which is close to the mouth of the glass bottle flowing through the hot coating line and forms a horizontal vortex at this height position And a control means for controlling the number of revolutions of the fan. 2. The hot-coating apparatus for a glass bottle according to claim 1, wherein the control means performs an inverter control. 3. The glass bottle according to claim 1, wherein said exhaust means has an exhaust port for sucking and exhausting from a position on an inner surface of a side wall of the constant temperature chamber slightly higher than an installation height of said fan. Hot coating equipment.