SU1231018A1 - Method of manufacturing thin-walled hollow glassware - Google Patents

Description

one

The invention relates to glass industry, more specifically to glass instrument making, and can be used, for example, in the production of hollowed-in lids for glass laboratory glassware.

The goal of the invention is to increase penetrability and increase the yield of usable products in the production of ground covers.

Fig. 1 shows the time of pulp production from a tubular blank; figure 2 - the moment of replanting bullets; FIG. 3 shows the moment when the bullet is blown out in an opened form; Fig. 4 illustrates the moment of the capture of the formed grip of the cover by the lower cartridge after removing it from the opening shape; in FIG. 3, the moment of the cover opening downwards, followed by its separation from the tubular billet with simultaneous heating of the cap from the side of the free end, i.e. from the grip; 6 shows the time of annealing of the state of the pipe billet and cooling of the shaft

Example. Get a hollow crack CB24 / 10 with a maximum diameter of 24.5 mm; height of the conical part 12.0 ± 2.0 mm; total height Krsh1ki with grip 24.0 mm; diameter of cylindrical grip is 12.0 mm and the bulk wall of the lid is 1.0-1.6 mm.

A tubular glass preform 1 with a diameter of 21.5-23.0 mm and a wall thickness of 2.8-3.0 mm is secured in the chuck 2 of a clamping device (not shown).

Turn on the rotation of the cartridge 2, cut the free end of the tubular billet 1 and sealed it. The burner 3, directed at an angle to the longitudinal axis of the tubular blank 1, heats the free sealed end of the tubular blank 1 and produces a pellet with a natopa of glass melt on top of it with a thickness of 6 mm, i.e. 2-3 times the wall thickness of the tubular billet.

Table 4 was used to infuse pullets to a length of 31.0 ± 0.5 mm, lying within 2/3 to 3/4 of height, 41, О mm of the working cavity of the open flåm 5, so that the pellet lay on its hanger. .

When calculating the open form, it is necessary to take into account that the length of the cylindrical part of its working cavity

0

S

should be equal to 1.2-1.5 lengths of its conical part.

The obtained glass pellet is introduced into the opening 5, made of graphite or steel, and the compressed air is blown in until the glass mass is distributed throughout the working cavity. This is how the blank 6 is obtained.

After the mold 5 has been uncovered from below, the cartridge 7, heated by the burner 8, is captured and the cooling grip 9 of the molded billet 6 is seized.

A cut-off burner 10 is fed to the cylindrical part of the billet, approximately at the transition from the cylinder to the cone, and the tubular billet is pulled up at the same time, and the formed blank of the cover 6 is pulled down by heating the free end of the tubular burner 11 from the side 9 to the notch to the bottom of the finished cover 12 turned out to be minimal.

Next, the torch 12 cuts off the barbel on the base of the tubular billet, and the finished cylinder 12 is slowly cooled as it rotates in the cartridge 7 and unloaded into the muffle or onto the LER line (not 0 shown).

The krshhek cycle is repeated.

The thickness of the bullet at the base should be 2-3 times the wall thickness of the tubular billet at that time.

five

DOS,

The moldable part of the product becomes thinner, i.e. wall thickness (in particular, covers) of the shoulders and grip

0 krsh1ki gets less thickness

side walls krshzhy. In the case where 3tjQt. The lower moldable part of the glassware (again, the grips and the hanger shoulders) is thickened compared to the thickness of the side walls of the hinge.

In both cases, this is negative. The quality of the product, i.e. its durability and aesthetics. The specified thickness interval for the base of the bullet (tjjH 2-3t, ai) provides the required nominal wall thickness of the lower part of the molded glass piece.

Further, before placing the heating glass bullet into the ribbed form, it is necessary to replant it to a length equal to 2 / 3-3 / 4 of the length of the working cavity of the open form.

mold cavities.

 . P -2.3 ,, 3 4

The practice of using this method to form the crux of the bottle showed that the pellet should reach the level of the hangers of the open form. In case the pellet is heated shorter than 2/3 of the length of the working cavity of the form

Z. Pol. ) is observed black

 bullets

grip of glass melt to form the body of the lid and thinning it, and at the same time capture the expanded bullet head of the upper cylindrical

(narrower) part of the open form, which leads to underforming, i.e. to product marriage.

In the case when the pellet is heated longer than 3/4 of the working cavity of the mold

( -R

bullets l ptxff noA.

), an excess of glass melt is observed for molding the body and the lower part of glassware, which results in the lower narrow part of the disclosed form clamping the wider head of the pellet and, as a result, under-shaping and scraping of the product.

The proposed method allows the manufacture of kryppki with a fully enclosed volume, which creates a ball effect, and this provides increased strength of the products and an increase in the percentage of usable products, as well as replacing the non-progressive manual method of manufacturing the lid byuks with a more advanced mechanized one.

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Editor M.Petrova

Compiled by L.Golubeva Tehred L.Oleinik

Order 2520/28 Circulation 457 Subscription

VNIIPI State Committee of the USSR

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Project, 4

Proofreader I. Muska

Claims (1)

METHOD FOR PRODUCING HOLLOW THIN-WALLED GLASSWARE by producing a bullet, feeling it in races ------------------------------------- -------------------------------------------------- ---------- --------- _:. ··. in a closed form, extraction from the mold and cooling, characterized in that, in order to increase strength and increase the yield of suitable products in the manufacture of ground covers, the pulley is obtained by heating a tubular workpiece with a sealed end to form a filler with a thickness exceeding 2–3 times the thickness the walls of the tubular billet, and subsequent replanting to a length equal to 2/33/4 of the height of the working cavity of the mold, and after extraction from the mold, a guy is drawn, followed by separation of the lid while heating _{from the} free end. © SU .... 1231018