US1879872A - Mold for glassware forming machines - Google Patents

Description

Sept. 27, V1932. V, E HOFMANN 1,879,872

MOLD FOR GLASSWARE FORMING MACHINES Filed Jan. 16. 1930 lll ZJ-f vs/ww Patented Sept. 27, 1932 f .Y

UNITED STATES PATENT QFFICB;

VICTOR E. HOFMANN, or TOLEDO, OHIO, ,AssIGNo'R To OWENS-ILLINOIS GLAss f COMPANY, A CORPORATION OF OHIO 1v MOLD ron oInLisswAnn rOnMINC MACINES Application filed January 16, 1930. VSerial No. 421,1,53j-: l

The present invention relates to improvements in molds for machines used in forming hollow glassware and more particularlyto the blank or parison molds in which the articles of glassware are given their initial form.

An obj ect of the invention is the provision of an improved mold construction whereby conservation'of heat is materially furthered. To this end the mold is for the greater part iisulated in a fashion to reduce radiation of eat.

Another object is the provision, in a mold embodying the above characteristics, of -i means for greatly reducing the weight Of the mold and incidentally the manufacturing cost.

in part pointed out hereinafter.

In the drawing: L

Fig. 1 is a plan view of the improved mold.

Fig. 2 is a view taken along the line II*II of Fig. 1. Y

Fig. 3 is a sectional view taken substantially along the line III-III of Fig. 1.

In the illustrated embodiment of the invention, the blank mold 5 in which the blanks or parisons constituting partially completed articles of glassware are formed, comprises two cooperating sections 6 which are adapted to be supported upon, and alternately opened and closed by, a mold carrier (not shown) in any Y conventional manner. The mold is designed to cooperate with a neck r mold (not shown) and gather mold charges by Vsuction in accordance with the usual practice, said mold charges being transformed into blanks which are later transferred to 1inishing molds (not shown) for final shaping. 40 The two sections 6 of the mold are identical in structure, each comprising a body portion 7 which may be formed of iron or other suitable metal. ly semicircular in crosssection and provided with a channel in its flat longitudinal face, said channel cooperating with a corresponding channel in the other section when the mold sections are brought together in the formation of the mold cavity 10. Vacuum 0 grooves 11 formed in the flat sealing surfaces This body portion is substantial- `12l ofthe'mold section are adapted to be suitably connected through a neck mold (not shown) --withea source of vacuum supply (not j shown) Vduring gathering of mold chargesof `molten glassf `The upper end of the'interm'e- C55 diate `section 8 of the fbody portion 7 termi# natesv in far' radial flange 9 which cooperatesV with a` face plate 18 or mold bottom at the lower'end of said intermediatesection 8 in thev formation of a substantially semicircular channel 21 or chamber adapted to enclosean insulating material 13, such as asbestos, 1nineral wool or the like. Y The face plate 18 may .be attached to theintermediate section 8 of the body'portion by screws 19 Or'like fasteners. `Preferablythe iiange 9,;isfformed inte'- 'gralwith said section 8.v Other objects will be in part apparent and Y l vFor the .purpose of retainingthe ins'ulating material'V within Ithe chamber provided between the flange `9` and face plate 18, a '5 cover plate 14 of semicircular form'extends about the periphery'of the' flange 9 and face plate 18,having its upper and lowerends setfintocorner recesses 17 ig.v 3) so. that its outer ysurface'is'liush with the outer surf faces ofsaidtflange and; facey plate.v End walls 15 on the cover plate 14;Y close the ends of the channell 21 or chamber and havetheir extremities set.y .into recesses '20 providedY in the intermediate section 8 of the bodyipor-y g5' tion. Screws 16 or' other suitablefasteners provide suitable connection between these end walls 15 and the intermediate section 8 of the/body-portion 7 and'thereby reliably `secure the cover plate 14 inA osition to pre-V vent displacement of the insu ating material.V Because Vvthe'end walls 15 of the v:cover plate vare set -into therecesses. 20 inwardly from the sealing'isurfaces 12, interference. with proper contact between said sealing surfaces whenthe two sections of the .mold 1 are 'brought together is entirely avoided. The vface plate 18 is formed of high `temperature steel and consequently providesa mold bottom having Also. it provides reliable ymeans for assisting in holding the insulating material-,13l in proper position'about the `mold section; Since this face-plate is attached tothe bodyaporv Y tionbyimeansof screws 219, replacement 100 exceptionally long life. e5

thereof, when necessary, is greatly facilitated.

By constructing a blank mold as set forth above, the weight is greatly reduced because of the decreased quantity of iron or other metal employed, and by substituting an insulating material for the metal eliminated, radiation of heat is greatly reduced. Also, replacement of molds on machines while operating is facilitated throughl thisv weight reduction. Y

Modications may be resorted to within Y the spirit and scope of the appended claims.

' and having a radial outwardly extending .one face being What I claim is:

i 1. A mold comprising a pair of separableV sections, each section including a body portion substantially semicircular in cross-section formed with one portion of a mold cavity extending lengthwise of one face, said .flat to Vprovide sealing'k surfaces at opposite sides of the mold cavity,

each section formed with a l semicircular channel yconcentric with said one portion of the mold cavity, an insulating material in said channel, a cover plate vadapted to hold the insulating material within said channel, Q -K said plate having yend portions extending parallel with said sealing surfaces, said sealing surfaces having recessesinto which said end-portions extend, and' means for securing the end portions against movement relative to the remainder ofthe'mold vand thereby holding the cover plate in .proper position.

2; A mold comprising a pair of separable *i sections, each section including a body portion substantially U- haped in cross-section ange at one end, a faceplate'secured to the otherend of the body portion andextending radially to .form a ange which cooperates with the first namedV flange in providing a semicircular channel, an insulating material in said channel, and a cover plate connecting said iiange and faceplate and holdingl the I insulating material in said channel.

3. A mold comprising a pair of separable mold sections, each section includingabody portion substantially semicircular in crosssection, formed with one section of a mold cavity extending-lengthwise of its inner face, said face being flat to providel sealing'surfaces at opposite sides of the mold cavity, each mold section being formed with a semicircular channel concentric with-said mold cavity, insulating material in said channels, each mold section comprising a cover plate of sheet material overlying said insulating material and holding it within said channel, each cover plate having end portions bent inward to extend parallel with. said sealing surfaces, and means plates to the mold sections.

Signed at YToledo, Ohio,this14th day of January, 1930.`

for securing the cover v fvicron ii. rioriuiiiviv.V

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