JP2005047720A - Method and apparatus for cooling rough form of bottle-making machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent forming defects by optionally controlling the temperature distribution in the peripheral direction of a rough form. <P>SOLUTION: In order to cool a rough form 1 in its forming by vertically ventilating at a plurality of points along the peripheral direction, the rough form is thermally divided into a plurality of regions along the peripheral direction by heat insulation parts 22 and each of the divided regions 231, 232, 233, ... is independently cooled. Thus, the above purpose is achieved. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rough cooling method and apparatus for a bottle making machine, and more particularly, to a rough cooling method for a bottle making machine that cools a rough die during molding by aiming longitudinal ventilation at a plurality of locations in the circumferential direction. And the device.
[0002]
[Prior art]
Referring to FIG. 1 showing an embodiment of the present invention, a rough mold 1 receives a gob 2 as shown by a broken line in a figure which is a softened high-temperature glass lump through a charging port 1a at its upper end. The inserted gob 2 is shown by phantom lines in the figure depending on whether the inlet 1a is closed by the baffle 4 and then pressed through the mouth mold by the plunger 3 or blown through the mouth mold held in the pocket 5 of the rough mold 1. The parison 6 having a predetermined peripheral shape is formed. The formed inverted parison 6 is inverted to the finish mold side (not shown) by reversing 180 ° in the direction indicated by the arrow A in the drawing of the mouth mold after the baffle 4 is detached and retracted and the rough mold 1 is opened. After standing up, closing the finish mold, detaching the mouth mold and retracting, blow and finish molding.
[0003]
The parison 6 that is continuously formed in the rough mold 1 must always be formed to such a degree as to obtain the shape retaining property that can withstand the invert while having the necessary formability on the finishing die side, that is, flexibility. is there. Therefore, it is necessary to cool the rough mold 1 that continuously receives the gob 2 that is a high-temperature glass lump and raise the temperature, and keep it at a predetermined temperature.
[0004]
Therefore, referring to FIG. 2 showing an embodiment of the present invention, the ventilation path 7 is formed by holes, vertical fins, and the like provided at a plurality of locations around the outer surface 1b of the rough mold 1 forming the side circumferential surface of the parison 6. Through this, it has been practiced for a long time that the rough mold 1 is cooled by the vertical ventilation as shown by the arrow B in FIG. 1 and the parison 6 cools the predetermined cooling from the outside.
[0005]
However, the heat radiation environment to the outside of the rough mold 1 is not constant in the circumferential direction. For example, as shown in FIG. 2, the rough mold 1 is less likely to dissipate heat on the adjacent side than on the other side. In addition, a difference in the shape and thickness of the rough mold 1, a difference in atmospheric state due to the exhaust air flow of cooling air, and the like are affected. The temperature unevenness of the rough mold 1 becomes the temperature unevenness of the parison 6, and the shape and thickness become abnormal due to unevenness of unevenness or uneven thickness at the time of finish molding, thereby impairing the quality.
[0006]
To cope with this, as shown in FIG. 2, the ventilation restriction pipe 8 with respect to the ventilation path 7 on the side where the rough mold 1 is not adjacent, out of the ventilation paths 7 formed in a uniform size and arrangement in the circumferential direction. Measures to insert can be considered. This ventilation restriction pipe 8 regulates the ventilation indicated by the arrow B in FIG. 1 to each ventilation path 7 of the cooling air supplied from the plenum chamber 9 shown in FIGS. Restrict. As a result, the temperature unevenness in the circumferential direction of the rough mold 1 and the molding abnormality caused thereby were reduced, and the yield of the molding bottles was improved.
[0007]
On the other hand, it is also known that the amount and pressure of the cooling air supplied from the plenum chamber 9 to each ventilation path 7 are individually adjusted by individual dampers (not shown) for each of the plurality of ventilation paths 9a shown in FIG. (For example, refer to Patent Document 1).
[0008]
[Patent Document 1]
Japanese Patent Laid-Open No. 3-228833
[Problems to be solved by the invention]
However, the current situation is that the conventional countermeasures do not sufficiently cope with molding defects. Extremely uneven thickness such as the bottle 11 after finish molding shown in FIG. Further, in the bottle 11 with such uneven thickness, the baffle mark 11a shown in FIG. Often they are deformed and eccentric. This indicates that uneven thickness is generated during the finish molding from the parison 6 to the bottle 11, and the uneven thickness is generated in the lower half of the bottle 11 as shown in FIG. It is also recognized that the bottom side of the parison 6 is decentered toward the outside of the swing diameter with respect to the mouth mold due to the centrifugal force during the inversion from the rough mold 1 to the finish mold.
[0010]
In this regard, the present inventor conducted various experiments and repeated research. As a result, the individual cooling adjustment in the circumferential direction according to the conventional method is not reflected as expected in the rough mold 1, but in the circumferential direction of the rough mold 1. There was a limit to improving the temperature unevenness over the current level. This seems to be due to the fact that the heat transfer inside the rough mold 1 is not completely controlled, and an accurate temperature corresponding to the molding characteristics of the rough mold 1 and the molding characteristics of the parison 6 and the bottle 11. Setting and managing the distribution is extremely difficult.
[0011]
An object of the present invention is to provide a rough cooling method for a bottle maker and an apparatus therefor that can accurately control the temperature distribution in the circumferential direction of the rough mold and prevent molding defects based on such new knowledge. is there.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the rough cooling method of the bottle making machine according to the present invention is a method of cooling a bottle making use of a bottle making machine that cools the rough mold by forming a vertical draft at a plurality of locations in the circumferential direction. One feature of the coarse cooling method is that the coarse mold is thermally divided into a plurality of circumferential directions by the heat insulating portion, and independent cooling is performed for each divided region.
[0013]
In such a configuration, in order to cool the rough mold being formed by vertical ventilation at a plurality of locations in the circumferential direction, the rough mold is thermally divided into a plurality of circumferential directions by the heat insulating portion. By restricting the heat transfer between each divided area in the circumferential direction of the mold, and by cooling each vertical divided air independently for each divided area of the rough mold that restricts the mutual heat transfer, The temperature distribution in the circumferential direction is set and managed for each divided area, and the temperature unevenness in the circumferential direction is suppressed to the desired level, or conversely, according to the molding characteristics of the rough mold and the molding characteristics of the parison and bottle. Therefore, it is possible to accurately promote the partial extension and to provide a desired temperature difference for suppressing the elongation, and sufficiently cope with various molding defects.
[0014]
As a rough cooling device for a bottle making machine that achieves such a method, in the rough cooling device for a bottle making machine provided with ventilation passages for cooling by cooling in the longitudinal direction at a plurality of locations in the circumferential direction of the rough die, One feature suffices to be provided with a heat insulating part that thermally divides the rough mold into a plurality of divided regions in the circumferential direction and a ventilation means that performs independent cooling for each divided region.
[0015]
In the further structure in which this ventilation means has the independent ventilation path for every ventilation area of each division area unit,
For each ventilation area unit, each division area unit can be cooled independently by ventilating with an independent ventilation path.
[0016]
The rough cooling method of the bottle making machine of the present invention is also a rough cooling method of the bottle making machine in which the rough mold being molded is cooled by drafting in the vertical direction at a plurality of locations in the circumferential direction. Another feature is that it is thermally divided into a plurality of circumferential directions by the heat insulating portion, and cooling is performed under predetermined conditions for each divided region.
[0017]
In such a configuration, in order to cool the rough mold being formed by vertical ventilation at a plurality of locations in the circumferential direction, the rough mold is thermally divided into a plurality of circumferential directions by the heat insulating portion. The heat transfer between each divided area in the circumferential direction of the mold is limited, and the predetermined conditions due to the longitudinal ventilation for each divided area of the rough mold that restricts the mutual heat transfer, that is, individually different, Alternatively, the temperature distribution in the circumferential direction of the rough mold is set and managed in units of each divided area, which is different in certain divided areas and the same cooling is performed in certain divided areas. Suppressing to a desired level, or conversely, promoting a partial extension according to the molding characteristics of the rough mold and the molding characteristics of the parison or bottle, or giving a desired temperature difference for suppression. Can respond to various molding defects sufficiently. Can.
[0018]
As a rough cooling device of a bottle making machine that achieves such a method, in the rough cooling device of the bottle making machine provided with cooling holes for cooling by vertical ventilation at a plurality of locations in the circumferential direction of the rough die, It is sufficient to have other features that include a heat insulating portion that thermally divides the rough mold into a plurality of divided regions in the circumferential direction, and ventilation means that performs cooling under predetermined conditions for each divided region.
[0019]
In the further configuration in which the ventilation means makes at least one of the passage cross-sectional area, the arrangement pitch, and the arrangement number of the ventilation paths different for at least one of the ventilation paths for each divided area,
Only at least one of the cross-sectional area of the ventilation path, the arrangement pitch, and the number of arrangements is different for at least one of the ventilation paths in each divided area. Predetermined cooling can be performed due to differences in ventilation conditions, such as different between divided areas and the same between certain divided areas.
[0020]
In a further configuration, where the heat insulating part is a slit cut inward from the side periphery of the rough mold,
The slit is not only cut from the side of the rough mold inward, but the metal part of the rough mold not only cuts off the continuous heat conduction, but also embracs air and exerts a heat insulating effect, so the rough mold is thermally activated in the circumferential direction. It sufficiently functions as a heat insulating part that is divided into two parts.
[0021]
In the further configuration, the slit has a ventilation blocker that blocks vertical ventilation.
When the vertical ventilation in the slit is blocked by the ventilation block, the air hugging the slit is pushed by the flow of the atmosphere due to the exhaust of cooling air, etc., preventing the heat conduction effect due to convection. , The thermal separation by the slit can be stabilized.
[0022]
In a further configuration, where the slit is a cut by a disk cutter,
Since the slit is formed by the cutting of the disk cutter, it is easy to provide the slit in the middle part of the rough mold in the limited vertical direction. In addition, the bottom shape with the deepest part of the cut on the diameter line in the cut direction and the part that gradually becomes shallower on both the upper and lower sides is obtained by a simple straight cut of the cutter. It is easy to reduce and prevent the thermal separation effect of the slit from affecting the subtle cooling, temperature adjustment by the mouth, and the subtle cooling and temperature adjustment by the mouth mold side and mouth mold as necessary. To do.
[0023]
In the further configuration where the deepest part of the slit is located closer to the bottom of the molding,
It is easy to preferentially cope with uneven thickness on the bottom side of the bottle as described above, and it is easy to cope with changes in large diameter and shape necessary for finish molding by suppressing cooling of the neck side in molding of narrow mouth bottles. .
[0024]
Further objects and features of the present invention will become apparent from the following detailed description and drawings. Each feature of the present invention can be used alone or in combination in various combinations as much as possible.
[0025]
【Example】
Hereinafter, a rough cooling method of a bottle making machine according to the present invention and an embodiment of the apparatus will be described with reference to FIGS. 1 to 3 for understanding of the present invention. The following description and illustrations are specific examples of the present invention and do not limit the contents described in the claims.
[0026]
The rough mold cooling method of this embodiment is shown in FIGS. 1 to 3 and is for cooling the rough mold 1 described above. The rough mold 1, the plunger 3, the baffle 4 and the rough mold 1 of the bottle making machine are used. In the rough mold apparatus 21 composed of a mouth mold held in the pocket 5 of the mold 1, vertical ventilation by cooling air as shown by arrows B in FIG. Plan and cool. In this cooling, the rough mold 1 is thermally divided into a plurality of circumferential directions by a heat insulating portion 22 as shown in FIGS. 1 and 2, and each of the divided regions 231, 232, 233. Cool down.
[0027]
In this way, for the rough mold 1 being formed, the rough mold 1 is thermally divided into a plurality of circumferential directions by the heat insulating portion 22 in order to cool the rough mold 1 in a plurality of positions in the circumferential direction by cooling vertically. The heat transfer between the divided areas 231, 232, 233... In the circumferential direction of the mold 1 can be restricted. In this way, each of the divided areas 231, 232, 233... Of the rough mold 1 in which mutual heat transfer is limited is independently cooled by the vertical ventilation or predetermined by the vertical ventilation. In other words, the temperature distribution in the circumferential direction of the rough mold 1 is divided by the unit of each divided region, which is different for each divided region or different for each divided region, and the same cooling is performed for each divided region. Can be set and managed. As a result, the temperature unevenness in the circumferential direction is suppressed to a desired level, or conversely, partial extension and deformation are promoted or suppressed in accordance with the molding characteristics of the rough mold 1 and the molding characteristics of the parison 6 and the bottle 11. It is possible to appropriately give a temperature difference for achieving a desired level at will, and it is possible to sufficiently cope with various molding defects and prevent molding defects.
[0028]
By the way, the correlation between the temperature distribution of the rough mold 1 and the molding failure of the bottle 11 is difficult to grasp and sometimes unknown. Therefore, in many cases, the actual condition setting is performed while repeating trial molding according to the size and type of the rough mold 1 and the bottle 11. However, by performing independent cooling or predetermined cooling for each of the divided regions 231, 232, 233... Thermally divided in the circumferential direction of the rough mold 1, the difference in the cooling operation is clear in the molding of the bottle 11. Therefore, it is possible to cope with the problem more easily and in a shorter time than conventional trial and error. Therefore, the yield after setting the conditions is significantly improved.
[0029]
Here, the heat insulating portion 22 thermally divides the rough mold 1 in the circumferential direction. FIG. 1 shows a boundary line with the rough mold 1 and FIG. May be provided in a radial pattern around the axis 24, and may be provided straight in the vertical direction. Therefore, the slit 22a cut inward from the side periphery of the rough mold 1 or a heat insulating material for filling the slit 22a can be easily provided. .
[0030]
The slit 22a only cuts inward from the side periphery of the rough mold 1 and not only cuts off the continuous heat conduction by the metal of the rough mold 1 but also embracs air and exerts a heat insulating action. It sufficiently functions as a heat insulating portion 22 that is thermally divided into two. The heat insulating part 22 by such slits 22a and the like may be provided so as to divide the rough mold 1 into units for which heat management is to be performed individually. 2 is provided symmetrically with respect to the mating surface 25 as a boundary, and symmetrical with respect to the center line 26 orthogonal to the mating surface 25 in each rough mold 1 as shown in FIG. The rough mold 1 is divided into three divided regions 231, 232 and 233. However, the present invention is not limited to this, it is divided into two parts, or divided into four or more parts, the number of divisions and the division positions differ depending on the pair of rough molds 1, 1, or the division position in one rough mold. May not be symmetrical, or there may be a difference in width, depth, boundary shape with the rough mold 1, and the like. When using a heat insulating material, the material can be further varied.
[0031]
A slit 22a shown in FIGS. 1 and 2 is provided with a ventilation blocking portion 22b that blocks vertical ventilation. Specifically, the opening portion of the slit 22a to the upper surface of the rough mold 1 is closed with a metal plate or a heat insulating material, and the vertical ventilation through the slit 22a is blocked by the ventilation blocking portion 22b. As a result, it is possible to prevent the air held in the slit 22a from being pushed by the flow of the atmosphere due to the exhaust of the cooling air and the like, and conducting a heat conduction effect due to the convection. Can be stabilized. However, the ventilation blocking part 22b may be in any part such as in the middle of the slit 22a, and a plurality of ventilation blocking parts 22b may be provided.
[0032]
As shown in FIGS. 1 and 2, the coarse cooling device 31 of the bottle making machine 31 that achieves the above-described method has a plurality of circumferential directions of the rough die 1 in the coarse shaping device 21 of the bottle making machine as described above. A ventilation path 7 is used for cooling by vertical ventilation at the location. Specifically, in addition to the heat insulating portion 22 as described above for thermally dividing the rough mold 1 into a plurality of divided areas 231, 232, 233... In the circumferential direction, each divided area 231, 232, 233. In addition, while using these ventilation paths 7, the ventilation means 32a for performing independent cooling, or the predetermined conditions by the vertical ventilation, that is, individually different or different in a certain divided area, a certain divided It is assumed that a ventilation means 32b for cooling under the same conditions is provided between the areas.
[0033]
Here, as shown in FIGS. 1 and 2, the ventilation means 32 a uses the independent cooling air ventilation structure by the plenum chamber 9 as described above, for example, the ventilation path 7 of the divided area 231, and the divided area 232. By using an independent ventilation path 9a for each ventilation path 7 of the ventilation path 7 and the divided area 233, an independent ventilation is achieved for each ventilation path 7 of each divided area 231, 232, 233,. The divided areas 231, 232, 233... Can be cooled independently. That is, the air volume and the wind pressure in the independent ventilation path 9a are adjusted independently as described in Patent Document 1, and the temperature distribution in the circumferential direction of the rough mold 1 is divided into the divided regions 231, 232, 233,. Can be set and managed in units.
[0034]
Further, the ventilation means 32b uses the previously described ventilation path 7 group shown in FIGS. 1 and 2 to divide at least one of the passage cross-sectional area, the arrangement pitch, and the number of arrangement of the ventilation paths 7 into the divided areas 231, 232. .. 233... Different by each at least one of the ventilation paths 7, each ventilation area 231, 232, 233... The predetermined cooling according to the difference in the ventilation conditions can be performed by setting the same in the divided regions and supplying the common cooling air through the plenum chamber 9. That is, the temperature distribution in the circumferential direction of the rough mold 1 can be set and managed in units of the divided regions 231, 232, and 233.
[0035]
If both of these ventilation means 32a and 32b are used in combination, finer adjustment of cooling can be performed, but either one is sufficient in reality. In the example shown in FIG. 2, the ventilation path 7 is provided with the same number of holes having the same shape and size in each divided area 231, 232, and 233 at the same pitch, and the divided area 231 on the side not adjacent to the other rough mold 1. Only the ventilation path 7 is inserted with a ventilation restriction pipe 8 that narrows the cross-sectional area of these passages, and the yield is improved.
[0036]
In the illustrated example, the slit 22a is cut by a disk cutter 30 indicated by a virtual line. As described above, since the slit 22a is formed by the cutting of the disc cutter 30, the deepest portion 22c of the cutting is provided on the diameter line 32 in the cutting direction indicated by the arrow C in FIG. Has a shallow portion 23d. Such a bottom part shape is obtained by a simple straight cut as indicated by an arrow C of the disk cutter 30, and it is easy to provide a slit 22 a in a limited middle part of the rough mold 1 in the vertical direction. And subtle cooling by the baffle 4, temperature adjustment, subtle cooling by the mouth side of the rough mold 1 and the mouth mold, and temperature adjustment are reduced if necessary by the thermal cutting action by the slit 22a, and It is easy to prevent.
[0037]
In this example, in particular, the deepest portion 22c of the slit 22a is located closer to the bottom of the parison 6 that is a molded product. As a result, it is easy to preferentially deal with the uneven thickness on the bottom side of the bottle 11 as described above, and it is possible to suppress the cooling on the neck side in the molding of the narrow mouth bottle and to change the large diameter and shape necessary for finish molding. It becomes easy to correspond.
[0038]
【The invention's effect】
According to one aspect of the present invention, a rough cooling method for a bottle maker and an apparatus therefor are used to cool a rough mold being molded by cooling it at a plurality of locations in the circumferential direction with longitudinal ventilation. The heat transfer between the divided regions in the circumferential direction of the rough mold is restricted by the heat insulation part in the circumferential direction, and for each divided area of the rough mold that restricts the mutual heat transfer. By cooling independently by the vertical ventilation, the temperature distribution in the circumferential direction of the rough mold is set and managed in each divided region unit, and the temperature unevenness in the circumferential direction is suppressed to a desired level, or vice versa. In addition, it is possible to optionally provide a desired degree of temperature difference for promoting or suppressing partial elongation in accordance with the molding characteristics of the rough mold and the molding characteristics of the parison or bottle. Defects can be sufficiently prevented.
[0039]
According to another aspect of the present invention, a rough cooling method for a bottle maker and an apparatus thereof are used to cool a rough mold during molding by cooling in a longitudinal direction at a plurality of locations in the circumferential direction. The heat transfer between the divided regions in the circumferential direction of the rough mold is restricted by the heat insulation part in the circumferential direction, and for each divided area of the rough mold that restricts the mutual heat transfer. The temperature distribution in the circumferential direction of the rough mold is determined by the predetermined conditions due to the vertical ventilation, that is, different from each other or different from each other in a certain divided region, and the same cooling is performed in a certain divided region. Set and manage in each segmented area unit to suppress the temperature unevenness in the circumferential direction to the desired level, or conversely, promote partial elongation according to the molding characteristics of the rough mold and the molding characteristics of the parison and bottle Or giving a desired temperature difference for suppression. To be, it is possible to sufficiently prevent various molding defects.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view around a rough mold apparatus showing a rough mold cooling method and apparatus for a bottle maker according to one embodiment of the present invention.
FIG. 2 is a partial plan view of the rough mold apparatus of FIG. 1;
FIG. 3 is a partial bottom view of the rough mold apparatus shown in FIG. 2;
4A and 4B show a defective molding bottle, in which FIG. 4A is a cross-sectional view and FIG. 4B is a bottom view.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Coarse type 7 Ventilation path 9 Plenum chamber 9a Ventilation path 21 Coarse type apparatus 22 Heat insulation part 22a Slit 22b Ventilation blocker 30 Disc cutter 31 Coarse type cooling apparatus 32a, 32b Ventilation means

Claims (10)

In the rough mold cooling method for a bottle making machine, which cools the rough mold during molding by aiming at vertical ventilation at multiple locations in the circumferential direction,
A crude mold cooling method for a bottle maker, wherein the crude mold is thermally divided into a plurality of circumferential directions by a heat insulating portion, and independent cooling is performed for each divided area. In the rough mold cooling method for a bottle making machine, which cools the rough mold during molding by aiming at vertical ventilation at multiple locations in the circumferential direction,
A rough cooling method for a bottle maker, wherein the rough mold is thermally divided into a plurality of circumferential directions by a heat insulating portion, and cooling is performed under a predetermined condition for each divided region. In the rough cooling device of the bottle making machine provided with the ventilation path for cooling by aiming at the vertical ventilation at a plurality of locations in the circumferential direction of the rough mold,
A coarse cooling device for a bottle making machine, comprising: a heat insulating portion that thermally divides the rough mold into a plurality of divided areas in the circumferential direction; and ventilation means that performs independent cooling for each divided area. The rough cooling device for a bottle maker according to claim 3, wherein the ventilation means has an independent ventilation path for each ventilation path of each divided area unit. In the rough cooling device of the bottle making machine provided with cooling holes for cooling by aiming at vertical ventilation at a plurality of positions in the circumferential direction of the rough mold,
A rough shape of a bottle making machine comprising: a heat insulating portion that thermally divides the rough mold into a plurality of divided areas in the circumferential direction; and a ventilation means that performs cooling under a predetermined condition for each divided area. Cooling system. 6. The rough cooling device for a bottle maker according to claim 5, wherein the ventilation means varies at least one of the passage cross-sectional area, the arrangement pitch, and the number of arrangement of the ventilation paths for at least one of the ventilation paths for each divided area. The coarse cooling device for a bottle making machine according to any one of claims 3 to 6, wherein the heat insulating portion is a slit cut inwardly from the side periphery of the coarse die. The rough cooling device for a bottle making machine according to claim 7, wherein the slit has a ventilation blocker for blocking vertical ventilation. 9. The rough cooling device for a bottle making machine according to claim 7, wherein the slit is formed by cutting a disk cutter. 10. The rough cooling device for a bottle making machine according to claim 9, wherein the deepest part of the slit is located near the bottom of the molded product.

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