JP3628975B2 - sleeve - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sleeve for guiding a plunger that molds the inner surface of a mouth of a parison in a parison molding process of a glass bottle molding machine using a blow and blow system.
[0002]
[Prior art]
An outline of a process for forming a glass bottle by a conventional blow and blow method will be described with reference to FIGS. 4A to 4C, the parison P as a semi-finished product is manufactured from the molten glass lump (gob) G using the rough mold 20. In FIG. 4 a, gob G is put into the rough mold 20, and in FIG. 4 b, it is pressurized with compressed air from above through the baffle 22 (settle blow), and glass enters the mouth mold 21 below the rough mold 20. Is made. At this time, the plunger 12 is set at a predetermined position. In FIG. 4 c, the plunger 12 is lowered, air is blown into the cavity (counter blow), and the parison P is formed by the rough mold 20 and the upper baffle 22. In FIG. 4d, the parison P is transferred to the finishing mold 24 by using the reversing device (mechanism) 26, and in FIGS. 4e to 4f, the glass bottle B as a final product is formed (final blowing) in the finishing mold 24. Then, the glass bottle B is taken out from the finishing mold 24.
[0003]
5 to 7 show the process of forming the mouth part of the glass bottle of FIG. 4b in some detail. 5 shows the plunger down position, FIG. 6 shows the loading position, and FIG. 7 shows the plunger up position. The sleeve 10 and the plunger 12 are lifted from the plunger down position of FIG. 5 and moved to the loading position of FIG. At this time, the sleeve 10 that guides the plunger 12 is fitted with the mouthpiece 21 at the upper end 11 thereof. Next, the plunger 12 rises to a position determined by using the inner surface of the sleeve 10 as a guide, and reaches the plunger up position of FIG. In this state, settle blow is performed to form the mouth portion. The sleeve 10 has a substantially cylindrical shape, and an upper portion is an upper end portion 11 whose inner diameter and outer diameter are reduced, and the whole including the upper end portion is integrally formed.
[0004]
[Problems to be solved by the invention]
5 to 6, the upper end portion 11 of the sleeve 10 enters and fits into the mouthpiece 21. By the way, the center (center) of the mouth mold 21 and the center of the sleeve 10 do not always coincide completely, but rather, there are more cases where they are slightly shifted (about several tenths of a millimeter). When there is such a deviation, the sleeve 10 enters the mouth mold 21 while forcibly interfering with it in a slightly inclined state, so that the plunger arrival time is delayed or the plunger does not reach the determined position. Occurs. In such a case, a so-called “heaven bite” is caused at the mouth of the glass bottle. Further, when the molding of the mouth portion is completed and the plunger is moved from the plunger up position in FIG. 7 to the plunger down position in FIG. 5, if the sleeve and the center of the mouth mold do not coincide with each other, A mechanical shock occurs in the rough mold. This impact causes a so-called “neck” at the top of the mouth mold.
[0005]
An object of the present invention is to improve the efficiency of manufacturing a glass bottle by improving the sleeve to eliminate problems caused by misalignment between the sleeve and the mouth mold, reduce the occurrence of defects at the mouth of the glass bottle, and It is.
[0006]
[Means for Solving the Problems]
The present invention relates to a sleeve for guiding a plunger that molds the inner surface of a mouth of a parison in a parison molding process of a glass bottle molding machine by a blow-and-blow method. The sleeve is characterized in that the portion is formed as a separate body from the cylindrical main body, and the upper end portion can be finely moved in the horizontal direction with respect to the cylindrical main body.
[0007]
Since the cylindrical main body and the upper end of the sleeve are separated, and the upper end can be slightly moved in the horizontal direction with respect to the cylindrical main body, the center of the cylindrical main body of the sleeve and the mouth mold are displaced. However, the upper end part that fits with the mouth mold slightly moves in the horizontal direction with respect to the cylindrical body, and the upper end part can be fitted straight without any interference in the state where the center is completely aligned with the mouth mold. it can. The plunger moves up with the upper end of the sleeve as a guide without interfering with the inner surface of the sleeve, and the plunger and the center of the mouth mold completely coincide. Therefore, there is no longer a drawback of so-called “top bite” due to a delay in the arrival time of the plunger and the fact that the plunger does not reach a predetermined position. Also, when the plunger is lowered, the upper end of the sleeve is smoothly removed from the mouth mold, and no mechanical shock is generated, so that a so-called “necking” defect does not occur.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing examples. 1 is a top view of the sleeve 1 of the embodiment, FIG. 2 is a sectional view taken along the line XX in FIG. 1, and FIG. 3 is an explanatory view of the sleeve 1 in use.
[0009]
As shown in FIGS. 1 and 2, the sleeve 1 is composed of a cylindrical main body 2 and an upper end portion 3 having a substantially cylindrical shape. The upper end 3 has a slightly smaller inner diameter and outer diameter than the cylindrical main body 2, and the outer diameter of the upper end 3 is about 1 mm smaller than the inner diameter of the cylindrical main body 2, so that the upper end 3 Is loosely fitted in the upper part of the cylindrical main body 2 and its lower end is in contact with an annular shelf 5 formed on the inner surface of the cylindrical main body 2. Two pin holes are formed in the side surface of the cylindrical body 2 and two screw holes are formed in the side surface of the upper end portion 3, and the pin 4 is inserted into these pin holes and screw holes, and the tip portion thereof is a screw at the upper end portion. Screwed into the hole. The pin hole of the cylindrical main body 2 is slightly larger than the outer diameter of the pin 4, and as a result, the upper end can be slightly moved about 1 mm in the horizontal direction with respect to the cylindrical main body.
[0010]
FIG. 3 shows an uploading state in which the plunger is raised. The upper end portion 3 of the sleeve 1 is fitted to the mouth mold 21, but even if the center of the tubular body 2 of the sleeve mold 21 and the sleeve 1 is displaced, the upper end portion 3 is slightly moved in the horizontal direction so that the mouth mold 21 Matches the center of 21 (and coarse mold 20) perfectly. The plunger 12 rises without interfering with the inner surface of the sleeve 1 using the upper end 3 of the sleeve 1 as a guide, and does not generate any mechanical impact when lowered. The defect of “living” can be prevented.
[0011]
【The invention's effect】
The sleeve of the present invention absorbs the deviation between the center of the sleeve and the mouth mold (and the rough mold), and the plunger moves up and down smoothly without interfering with the inner surface of the sleeve, so that it is possible to prevent the occurrence of defects in the glass bottle mouth portion. .
[Brief description of the drawings]
FIG. 1 is a top view of a sleeve 1 of an embodiment.
2 is a cross-sectional view taken along line XX in FIG.
FIG. 3 is an explanatory diagram of a use state of a sleeve 1;
FIG. 4 is an explanatory diagram of a glass bottle forming process by a blow and blow method.
FIG. 5 is an explanatory diagram of a conventional sleeve 10;
6 is an explanatory diagram of a conventional sleeve 10. FIG.
7 is an explanatory view of a conventional sleeve 10. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Sleeve 2 Cylindrical main body 3 Upper end part 4 Pin 5 Annular shelf 10 Sleeve 11 Upper end part 12 Plunger 20 Rough type 21 Mouth type 22 Baffle 23 Guide ring 24 Finishing type 25 Bottom type 26 Mechanism

Claims (3)

A sleeve that guides the plunger that molds the inner surface of the mouth of the parison in the parison molding process of the glass bottle molding machine using the blow-and-blow method. A sleeve which is formed as a separate body from the main body, and whose upper end portion can be finely moved in the horizontal direction with respect to the cylindrical main body. 2. The sleeve according to claim 1, wherein the upper end portion is fitted into the upper portion of the cylindrical main body, and the outer diameter of the upper end portion is slightly smaller than the inner diameter of the cylindrical main body, so that it can be finely moved in the horizontal direction. Sleeve 3. The sleeve according to claim 2, wherein the upper end portion and the cylindrical main body are loosely coupled to each other by a pin horizontally provided on the peripheral wall.

Images