JPS60171241A - Method and device for increasing strength in mouth part of glass ware - Google Patents

Abstract

PURPOSE:To form a compressive stress layer on the surface in the mouth part of glass ware to increase the strength in the mouth part by subjecting the mouth edge of the glass ware to a calcination treatment by a burner flame then applying the flame from the mouth to the body part thereby relieving the abnormal strain and stress generated by the calcination. CONSTITUTION:Glass ware 6 after cracking-off is placed on a receiving base 1 and is fed to a calcination zone after preheating. While the glass 6 is rotated, a strong flame f1 of a narrow width is applied from a calcination burner 7 to the mouth edge 6a from the position slightly higher than the edge 6a, by which the rough cut surface is subjected to a calcination treatment. The glass ware is then moved into a relieving zone where the flame f2 from a relieving burner 8 is applied to the same level as the level in the abnormal stress and strain zone in the mouth 6b of the glass ware or slightly lower than the same. The uneven strain and stress in the peripheral direction of the mouth 6b is thus decreased and the strength of the mouth 6b is increased.

Description

Detailed Description of the Invention [Industrial Field of Application] This invention is directed to the glassware manufacturing process, in which the mouth of the glassware is heated rapidly and strongly by the burner during sun tanning of the mouth edge of the glassware. This invention relates to a method and an apparatus for finishing the mouth edge of a glassware and increasing the strength of the mouth at the same time by alleviating abnormal strain stress generated in the glassware, balancing the strain force A11, and further applying air cooling. It is something.

[Prior Art] Conventionally, as one of the manufacturing methods of glassware, after molding (blow-and-blow or press-and-blow), the glassware is passed through a slow cooling furnace to remove strain, and then unnecessary parts of the glassware (
A method of cutting (crack-off) moil is known. As a result of this cutting, the cut portion of the glassware becomes a rough surface with minute irregularities, so in order to create a smooth surface, the cut portion is subjected to a tanning treatment (edge melting). When the glassware is cooled and made into a product, abnormal strain stress occurs, especially at the mouth of the glassware, and this abnormal strain stress causes characteristic breakage along the stress (ring breakage).
The defect is that it tends to cause For this reason, glassware whose edges have been burnt are always slowly cooled again to remove any abnormalities in the mouth.

Nowadays, in order to diversify the designs of glassware and emphasize its elegance, it is required to reduce the thickness of the glass at the mouth. As a result, the strength of the mouth of the glass vessel becomes weak, causing the problem that even if the abnormal mouth part is simply removed by slow cooling as described above, it is still easy to break. In order to compensate for these problems, measures such as strengthening the air cooling port or chemically strengthening can be taken, but these methods have the problem of requiring relatively large equipment.

[Object 1 of the Invention] This invention completely eliminates the abnormal strain stress that occurs at the mouth of the glassware after the sun-baking treatment by re-cooling it as in the conventional method. The purpose is to form a compressive stress layer on the surface of the glassware 1 and increase the strength of the mouth of the glassware by relaxing it to the extent that no ring breakage occurs, or by further cooling and covering it with air after relaxation.

[Structure of the Invention] This invention applies a burner flame to the mouth edge of a cracked-off glassware to give it a sunburn treatment, and immediately after the sunburn treatment, the mouth of the glassware that has been erected extends from the mouth of the glassware to the body. The first 11 indications are to apply a burner flame to alleviate the abnormal strain stress caused by the tanning treatment, balance the strain distribution, and increase the strength of the mouth of the glassware. A second feature is that immediately after the above treatment, compressed air is blown onto the glassware from above to form a compressed layer on the surface of the glassware.

Furthermore, in order to carry out the above method, a plurality of glassware holders are arranged in series and are movable in the direction in which they are arranged, and as the moon pedestal moves, each of the glassware holders is rotated on its own axis.
On the other hand, along the moving direction of the glassware holder from the upstream side to the downstream side, there is a tanning zone equipped with a C11 roasting burner, a relaxation zone equipped with a relaxation burner, and a cooling zone equipped with a cooling nozzle for compressed air ll71 sword. The third feature is that they are arranged in sequence.

[Example] The present invention will be explained below based on the embodiments shown in the drawings.

1 and 2 are views showing a mouth strength increasing device according to the present invention. First of all, FIG. 1 does not schematically show the entire apparatus, and the reference numeral 1 in the figure is a glassware holder, a plurality of which are arranged in a row along an endless rail 2. There is. The glassware holder 1... is moved in the direction of the R arrow by an appropriate drive device (not shown). In addition, each of the glassware holders 1 rotates in the r direction along with this movement, and the structure of the rotation is such that each of the glassware holders 1 is vertically installed below the glassware holder 1 as shown in FIG. 2. A drive sprocket 4 is attached to the lower end of the shaft 3. When the glassware holder 1 moves (revolutions) in the direction of the arrow R, the drive sprocket 4 engages with a chain (not shown) installed along the endless rail 2, and each of the glassware holders 1 rotates and turns over. Reference numeral 1a on the glassware holder 1 is a glassware support fitting. The following zones are arranged along the movement path (endless rail 2) of the glassware holder 1.

The f1 code Δ places each of the glassware 6 carried in the entrance section C1 on the glassware holder 1 . . . . B is a drying/preheating zone, which dries the water adhering to the glassware 6 that has been washed and transported therein, and at the same time preheats the glassware 6 for baking. C is the tanning zone, and tanning barb 7 is (C11
The rim 6a of the glassware 6 is tanned to increase its length.

Reference numeral D denotes a relaxation zone, which is provided with relaxation barbs 8 to relieve the abnormal strain stress generated in the glass mouth 1 part 6b due to the sunburning treatment.

1- is the cooling zone, l[cooling II for condensed air WI QA
)' The strain-relaxed glassware 6 equipped with a through hole 9 is further rapidly cooled to form a compressive stress on its surface. Cold I
The JI nozzle 91 is connected to the blower 11 via an air pipe. The above-mentioned roasting zone C to cooling zone E are arranged adjacent to each other. F is a take-out port, and a take-out conveyor 12 is disposed near the take-out port.

FIG. 3 shows the vertical arrangement of the solar burner 7 and the relaxation burner 8 with respect to the glassware 6 erected on the glassware holder 1. The solar burner 7 is arranged at a position where the flame f1 is applied to the mouth edge 6a from a slightly obliquely upper position. On the other hand, the relaxation burner 81 is arranged at a position perpendicular to the lateral direction or at a position where it applies the flame f2 slightly upwardly to the body of the glassware 6.

Next, the method and effect of increasing the strength of the mouth of the glassware 6 using the above device will be explained.

After the glassware 6 from which unnecessary portions (moil) have been cut is cleaned, it is carried to the entrance part Δ by a container 1' 5 and placed on the glassware holder 1 one after another. Glassware pedestal 1”-
The glassware 6 is secured in a placed state by the glassware support fitting 1a and is moved toward each zone while rotating in the r direction. Each zone device 6 is first preheated in a drying/preheating zone B, and then subjected to a tanning treatment in a tanning zone C. Tanning zone C
Now, from a position slightly higher than the lipstick part 6a of the rotating glassware 6, a relatively narrow and strong frame 1 from the solar burner 7 is applied to the mouth edge 6a of the glassware 6, and the cut part with the unevenness is The rough surface is subjected to a tanning treatment.Then, the glassware 6 is
Moving to the relaxation zone D, the abnormal strain stress generated in the glassware 1'' portion 6b during the previous tanning treatment is relaxed. The frame f2 from the relaxation burner 8 in the relaxation zone D approaches the glassware opening 6b from the lateral direction with respect to the upright glassware 6.
Is it at the same level as the abnormal strain stress zone X2 (Fig. 4)?
Slightly below (]] Approximately 20mm downward from the edge 6a)
There is a number of hearts to apply to. The optimum relaxation time is 5 to 25 SeO, and if heating is performed for a longer time than this, thermal strain response horns due to the relaxation burner 8 itself will occur as x3 zones (FIG. 4). As long as this thermal strain stress is weak, no problem will occur, but as in the x2 zone, if it becomes too strong, there is a high risk of ring breakage. In addition, the glassware 6 is within the relaxation 111 space (D
You should avoid rotating at least twice within the time it takes to enter the zone. Thereby, it is possible to reduce the unevenness of strain stress in the circumferential direction of the glass vessel mouth portion 6b. Fourth
The figure shows the sun-baking treatment of the glassware 6.
The figure shows a typical permanent set stress distribution that occurs in a tilted state observed through optical polarization. In the figure, XI, X2
, X3 indicates tensile stress, Yl, and Y2 indicates compressive stress.

×2 is abnormal strain stress (tensile stress) generated during tanning treatment
This is the strain stress zone that causes ring breakage.

In order to reduce the stress 1n in this ×2 zone, the glassware 6
Burner heats from inside or outside. If 111 is determined from the empirical data, the stress in the x2 zone (1f1 should be reduced to 5 kg/mm2 or less through relaxation treatment. If the stress value remains higher than this, ring breakage will occur. If this occurs, the danger will be very high, so it is desirable to change the frame f2 of the relaxation burner 8 to iJ! so that the absolute value of j is XI > Yl > X2 > Y2 > X3. ] 9r
% 'lbegi. This is because the distortion stress at the mouth part is gradually attenuated toward the bottom of the glassware 6, and strong distortion stress is applied to the mouth part 6b. This is the best way to keep it to a minimum. However, the order of the absolute values of the strain stress is not absolute, and as long as each strain stress value is low enough not to cause ring breakage, no problem will occur even if the above order is changed. do not have. Immediately after the above-mentioned relaxation treatment, the glassware 6 is moved to the cooling zone E, where compressed air at a pressure of 500 to 1000 rll m H20 generated in the core 11 is blown downward into the glassware 6 from the nozzle 9. Ill be fucked. By blowing this compressed air, the glassware opening 6b heated by the sunburning burner 7 and the relaxation burner 8 is rapidly cooled, and the surface of the glassware is heated by the 1. “A compressive stress is formed.

However, this invention alleviates the abnormal strain stress that occurs at the mouth part 6b of the glassware immediately after the sunburning process and causes the glassware to break, and furthermore, by injecting air cooling into this process, the surface of the glassware is compressed. By taking a series of steps to create stress, the strength of the mouth of the glassware can be increased. For the above reasons, the heated state of the glassware opening 6b immediately before air cooling must be as uniform as possible in the thickness direction of the opening, and the humidity must be raised to a level that does not cause deformation. It is necessary to gradually and continuously descend toward , in order for the distortion caused by air cooling to enter in a well-balanced manner. This also works effectively in C, which reduces the risk of breakage at the mouth, and in F, which aims to increase strong electrical current at the mouth.

[Effects of the Invention] The present invention allows a plurality of consecutive glassware holders to be freely moved in the direction in which they are connected while rotating, and to create a solar tanning zone equipped with a solar burner and a relaxation burner along this movement path. A relaxation zone equipped with a cooling nozzle for compressed air injection and a cooling zone equipped with a cooling nozzle for compressed air injection are arranged in sequence, and the rim of the glassware that has been cracked off is subjected to a sunburn treatment by applying a burner flame to the rim. Immediately after tanning, a burner flame is applied from the mouth to the body of the upright glassware to alleviate the abnormal strain stress generated during the tanning process and balance the strain distribution.
Immediately after this relaxation treatment, compressed air is blown to create compression on the surface of the glassware, so even if the glassware at the mouth is relatively thin, the mouth can be heated much faster than conventional air cooling. The effect is that the strength can be increased to the same level as or even higher than that of partially reinforced or chemically strengthened products.

Further, the present invention has the effect that a separate re-annealing facility as in the conventional case is not required during such a mouth strength increasing treatment.

[Brief explanation of the drawing]

Fig. 1 is a plan view schematically showing an embodiment of the glassware strength increasing device according to the present invention, and Fig. 2 is an enlarged side view showing the cooling zone and glassware holder portions of the device. Figure 3 shows the vertical arrangement of the sunburn burner and relaxation burner in relation to the glassware. FIG. 3 is a front view showing a state observed through target polarized light. 1 Glassware pedestal 6: Glassware 6a: Rim 6b Glassware mouth 7: D burner 8: Relaxation burner 9: Cold iJI nozzle 11 Niblower A: Inlet B: Dry smoke/preheating zone C: Burning zone D: Relaxation zone E: Cooling zone F: Outlet Applicant: Hoya Glass Co., Ltd. Agent Masayuki Asaji Figure 3 7 Figure 4

Claims (1)

[Scope of Claims] 1. A burner flame is applied to the mouth edge of the cracked-off glassware to tan it, and immediately after the sunburn treatment, from the mouth to the body of the glassware which is erected, A method for increasing the strength of the mouth of a glassware, which comprises applying a burner flame to relieve abnormal strain stress caused by the tanning treatment and to balance the strain distribution. 2 Apply a burner flame to the mouth edge of the cracked-off glassware to tan it, and immediately after the sunburn treatment, apply the burner flame from the mouth to the body of the upright glassware, and then The method is characterized in that by blowing compressed air onto the glassware, the abnormal strain stress caused by the tanning treatment is alleviated, the molecular distribution is balanced, and a compressed layer is formed on the surface of the glassware. Method for increasing the strength of the mouth of glassware. 3 A plurality of glassware holders are arranged in series so that they can be moved freely in the direction in which they are arranged, and each of the glassware holders is rotated along with this movement, and on the other hand, the upstream direction in the moving direction of the glassware holders is Along the downstream side from the side, there is a sunburning zone equipped with a sunburner for tanning the mouth edge of the glassware placed on the glassware holder. A relaxation zone equipped with a relaxation burner for alleviating the abnormal strain stress caused by the glassware, and a cooling zone equipped with a cooling nozzle for jetting compressed air for rapidly cooling the mouth of the glass vessel are sequentially arranged. A device to increase the strength of the opening of glassware.