US1688417A - Molding apparatus - Google Patents

Description

Oa. 23, 192s.A 1,688,417

L. J. GRUBMAN MOLDING APPARATUS Filed Dec.1e. 1925 2 sheets-sheet 1 INVENTOR Zef'rum 1a Oct. 23, 192g. lL. J. GRUBMAN MLDING APPARATUS 2 Sheets-Sheetl 2 Filed Deo. 16, l1925 INVENTOR dal 'nzmam KfW ATTORNEY Y Patented oct. 23,1923.

UNITED STATES LEO J. GRUBMAN, OF BELLE HARBOR, NEW YORK.- v

HOLDING APPARATUS.

Application led December 16, 1925. Serial No. 75,678.

This invention relates to molded articles and more particularly to doll heads and methods and means for making the same, and has for its primary object to provide a doll 5 head or other article wherein the finer surface contours will be sharply delineated and which will'have a more realistic and lifelike appearance than doll heads as now produced by methods or Aprocesses heretofore l0 employed in the art. y

Itl is'also an important object of the invention to provide a new and improved method for making such articles whereby production will `be greatly expedited with a correspond-f i ing decrease in manufacturingcosts.`

' It is also my purpose in 'one embodiment of the invention to provide a doll head having an 4internal pressure resistant core upon which a suitable impression receiving comi m position material is superimposed whereby the thickness of the impression receiving layer of material may be reduced while said composition structure is greatly strengthened and reinforced by the internal core. .f

It is likewise a particular object of my in' y vention'to provide an improved method and means for completely forming, shaping and nishing the surface of the doll `head in one operation and eliminating the necessity of mi. subjecting the surfaces of the head to a subsequent rubbing or abrasive action such as has heretofore been required in order to remove any unevenness.

My invention also has for an additional object to provide an improved mold'construction which may be easily and quickly operated aud automatically assures the correct positioning of the head core with respect/to the. mold section whereby the accurate formation `Wit-h the above and other objects in View, the invention consists in the improved'doll head` and inthe method and means for mak-- ing the same, which will be hereinafter more fully described, illustrated in the accompanying drawings and subsequently incorporated in the subjoined claims.

In the drawings, wherein I have illustrated one simple and practical embodiment of the apparatus for making doll heads in accordance with my improved method, and inwhich similar reference charactersdesignate corresponding parts throughout the kseveral views,Y-q

. Figure iis-'ia longitudinal` vertical section through the mold showing the same in closed l of the facial features of the head is attained.

position relative to the head core and the impression receiving material; v

Fig'. 2 is a plan view of the mold;

Fig. 3 is a detail transverse section taken substantial-ly on the line 3 3 of Fig. 1, the mold sections being omitted;

'Fig 4 is a side elevation partly in section showing a slightly modified form of the apparatus, 'and Fig.'5 is a detail side elevation showing an alternative form of the core for 'the doll head.

In .the manufacture of doll heads from wood pulp, papier mch or other composition material, it hasl heretofore been customary in the -art to mold the head in'separate front and rear sections by means of separate molds. The two head section were then joined edge-to edge by means of cement, glue or other suitable adhesive. Owing to the fact that these meeting edges of the two head sections are irregular, it was not an uncommon occurrence that although there was apparently no gap or space left between-the two head sections, after the: glue had dried and the surplus was Aremoved Eby sandpaper or otherwise. crevices would appear at intervals between the edges of the ftwo head sections.

It was'then necessary to Afill these crevices and aga-in remove the surplus cement or adhesive material. Thereafter, the surfaces of the head were rubbed down with sandpaper or emery cloth to remove hard projecting particles ofthe composition material and render the surfaces entirely smooth and even before applying the final Vor finishing solution to the surfaces of the head. Such rubloing orabrasive action unavoidably obliterated the ner lines or contours, delineating the detail features of the face. Therefore, after the head was finally immersed or otherwise covered by the coating solution which,

after hardening, was polished and painted, the completed head failed to bear the desired natural or life-like appearance. I propose by means of my present invention, not only to materially improve the naturalness or realistie' appearance of the doll head, but also to eliminate many of the operations required in carrying out such prior art method, thereby reducing manual labor and expediting quantity productions of such doll heads.

To the above end, my improvement in,

the artA may be broadlyl diferentiated from the old prior art method in that, in so far as the molding of the head is concerned, I produce in a single operation in a. continuous layer-of impression receivingmaterial both the front and rear partsof the head. vThus,

it will be understood that when the head is 'removed from the mold, it is completely closed l heretofore' been produced in the art, but in such cases, in order to mount or ari-ange an eye setting within the head it was necessary to cut an opening in the top vthereof and thereafter close said openingloyv re-uniting the top section'with the body of the head. In the preferable embodiment of my improved doll head, the head cannot be thus opened and therefore, the eye setting must' be inserted and applied in its operative position within the head through the neck opening thereofA and for this purpose I have devised a certain tool which is shown and described in my pending application foi` patent filed May 23, 1925, Serial No. 32,302.

In accomplishing the above noted purposes of my present invention, I employ certain apparatus, several practical examples of which I have illustrated in the accompanying drawings. Thus, in Fig. 1 there is illustrated vone embodiment of molding lapparatus consisting essentially of a vsuitable base 5 upon which a stationary mold section'G is suitably fixed.

Upon one end of this base 5 the angular end 8 of a lever 7 is pivotally mounted as at 9. A bracket 10 is fixed to this lever and carries the movable section 11 of the mold. vThe complementary cavities 12 and 13 respectively, of the two mold sections 6 and 11 have their surfaces very accurately machined and finished. The surface of the mold cavity 12 determines the contours of the opposite sides and rear portion of the doll head while the surface of the mold cavity 13 determines the contours of the forward side portions and the front or facial features of the doll head.

Upon the other end of the base 5 with respect to the pivot 9 ofthe lever 7, an arm 14 is pivotally supported at its lower end as at 15, the other end of said arm being bifurcated to receive the lever 7 and having the inclinedcam surfacesA 16. With these cam vsurfaces the ends of a transverse pin 17 fixed in the lever 7 are adapted tov coact. To one side of the arm 14 a core supporting member 18 is detachably and adj ustably se! cured by means of the bolt 19 engaged through t-he slot or opening 20 in said arm. This j support has a cylindrical tapering or conicalormed body in which the bolt 19 is threaded, said body atit-s base-havingan annular flange 21.v A .longitudinally extenditg upwardly curved arm 22 projectsfrom the smaller-end of said conical body and at its outer end has a rounded or convex edge In the use of this molding apparatus in the production of one form ofthe doll head, I arrange uponthe support 18 a suitable core, i,

roughly conforming inv longitudinal and drawings, this core may consist of front and rear sections 24 and 25 respectively, produced by die stamping from sheet metal orother suitable sheet material.

In forming these core sections, the outlines of the ears ai'e not produced so that the meetingA edges of the two sections whe/n placed together extend in a straight longitudinal-line bisecting the core.. 'These meeting edges of the core sections are provided with narrow outwardly projecting tianges 26 and these flan es are` united or secured to each other preerably by electrical welding. `After the core has thus been formed, it is inserted ovei` the support until 'said core at itsopen end abuts against they flange 21 while the curved edge 23 of the arm 22 bears .against the inner, side of the coi-e section 24 in proximity to the'part thereof corresponding to the forehead. The neck vportion of the sheet metal core fitsmore oi" less snugly'upon the conical surface of the body of the support 18. The arm 14 is then swung upon its pivot 15 until the sect-ion 26 of the core is positioned in the cavity 12 of the stationary mold section 6. A thin layer of plastic or seini-plastic composition inaterial indicated at 27 is rst arranged over the surfaces of the mold -cavity 12 and after the eorefis positioned thereon, a similar layer of suoli compositionmaterial 'is disposed upon the surface of the core section'24.v By means of the lever 7, the movable 'section 11 v.in the mold is then lowered into position in superi posed relation to the base or stationary section 6 so that the core section 24 and the plastic material tliereo/ n is received within the cavity 13 of the movable mold section. In this operationthe pin 17 coacting with the cam surfaces 16 forcesthe arm 14 towards the mold and tightly engages the Harige 21 thereon against the ends of the two mold sections 6 and 11, thus accurately positioning the core relative to the surfaces of the mold cavities. As the upper mold section 11 bears upon the' impression receiving composition material, impressions are formed in such material corresponding exactly with the con-v tours of the surfaces of the mold cavities 12 lll) and 13. Any excess of such material will be v exuded from beneath the opposed edges of the two mold sections at 27', at which point a slight projecting fin of the material will form lextendinglongitudinally from the exterior surface of the molded head. It will thus be seen that the sheet metal core becomes apart of the doll head and constitutes an internal lining therefor, the said core being inseparably interlocked by means of the laterally p roject'ing flanges 26 onlsaid core, with the outer coating of composition material in which the physical features ofthe head are impressed.

The hollowmetallic core or lining 'greatlyv strengthens or reinforces the head structure and enables me to use a comparatively thin layer of composition material of better qual-` ity and more uniform consistency than that heretofore employed. After the head is removed from the mold and permitted to harden and set, it- Will be found that with theA` papering, the only requirement being to remove the 'projecting iin of composition materialwhich can be easily and quickly accomplished. Thereafter the liead'surface can be vpainted or colored at the appropriate places to enhance the life-like appearance of the head. y

It will be seen from' the foregoing that the core support 18 constitutes in effect a `third mold section since it closes the open end of the mold chamber formed by the complementary cavities in the mold sections 6 and ll. Thus, as seenrin Fig. l of thedrawings, the mold chamber is substantially completely closed when the molding pressure is applied to the plastic material, the only point of escape for the excess material bein g between the opposing faces of the moldsectioiis 6 and 1l whereby the fin 27 is formed.`

In some cases, I may apply the plastic inipression receiving and retaining material to the core 24 before the core is mounted on the support 18 by dippingthe core into a mass of such material of the proper consistency. Thismaterial being of an adhesive nature, will adhere closely to the surfaces of the core and piovide a coating of the desiredthickness thereon. rIhe surface of this coating will, by contact with the atmosphere dry quite quickly and sufliciently to prevent its adherence to the surfaces of the niold sections. rllhe underlyingportion of said coating however, remains relatively soft so that it will readily yield to the molding pressure whereby the details of form and contour willv be sharply delineated in the surface of said plastic coating.

In the above,manner,

tion a completely formed doll head in which the finer lines or contours of the various physical features will be sharply ldefined'. By reason of the use of the sheet metal core and relatively thin body of the composition material, it vWill be apparent that I obtain lightness 'in Weight without' sacrificing. the

I am enabled to very quickly produce in a single molding operasame upon the support 18 forv use in connection with my improved mold. As shown in Fig. 5 of the drawings, the meeting edges of these 'two head-sections have a more or -less rough or irregular outline, but instead of filling up any crevices not filled by the glue or cement, these are permitted to remain and are subsequently completely filled by `the layer of plastic material placed over the surfaces of the twohcad sections and which re-v ceives the impression from .the mold cavities. Also by reason of the use of this impression receiving material, it is unnecessary to sandpaper the surfaces of the head sections before placing the saine in tlie'mold. In other Words, I employ the two part head. 'as heretofore made as a core. In both'cases howeves, it will be seen that the core affords a pressure resistant base upon which the composition layer may be superimposed and said layer directly received the impressions from the mold cavities.

In Fi g. l of the drawings, I have shown another forni of the apparatus in which the .iin-

pression receiving material is of more or less fluid-like consistency .and isadapted to be forced under pressure through the conduit 28 and inlet nipple 29 into the lower stationary section of the mold. I'Vhen the mold is closed, this impression receiving material completelyv l ills the space between the surfaces of the mold cavities and the surface of the core supported therein, it being understood that the material is forced under pressure upwardly about the core into the upper mold heads, it will be apparent that such improve-` ments mayalso be advantageously employed in the production of various other articles of an ornamental character fiom plastic materials. and it will according'gly` be understood that the essential features of the present dis-.

closure are not limited in their utility to the ,production of a specific article of manufacture. From the foregoing description, considered 1n connection with the accompanying drawplilgs, the construction, manner of operation a d several advantages of my present im' provements will be fully understood. It will be seen that I have provided a method for.` making doll heads which may be very eX- peditiously performed by means of simple and inexpensive apparatus-at,relatively small cost in labor and materials. Also by reason of this new method, the. doll head itselfwill presenta more realistic and natural appearance than doll heads as produced bythe prevailing methodl above referred to. It will further be appreciated that the mold appa- 'ratas `whichI have devised, though capable of rapid operation, enables the heads to be formed with'a high `degree ofi accuracy.l

h new method and doll v.head structure is conccrned, it may be possible to employ other' molding apparatus of an equivalent character. It ist# \be accordingly understood that in carrying oat my improvements in practice, I reserve the privilege of resorting to all such legitimate changes in the form, construction and relative arrangement oiE the several parts of the doll head structure and of the molding apparatus as may be fairly embodied within the spirit and lscope claimed.

I claim of the invention as 1. A molding apparatus consisting of stationary and movable mold sections, means for movably supporting the material to be molded, and means for operating the mova-l ble mold section to close the mold and simultaneously move said material supporting means to its final position relative to the mold sections, said means consisting of a pivoted lever carrying the movable mold section, and

a pin fixed in said lever to coact with cam surfaces of the material support.

2. AA doll head mold comprising stationary and movable mold sections, a pivotally Amounted support adapted to receive 'a hollow head core enveloped in a layer of impression receiving and* retaining material, means for operating the movable mold section', and.

means carried bythe operating means coacting with said pivoted support to move the.

core and the impression receiving-.material to position for the accurate formation of the impressions in said material as the mold is closed;- a

3. A molding apparatus comprising mold sections. having complementary cavities to form a chamber open at one end when'the mold is closed, a support'for the material to be molded, and means for relatively moving the mold sections to close the mold and simultaneously position said ,support with the,

' moldable material thereon tli'oughthe open 'i 'end of the mold chamber.

4. "A- molding apparatus comprising a plurality of relatively movable mold sections, means carried by one of said sections for supporting the material to be molded, and means sections having complementary cavitiesto 'l'jorm a chamber vopen at one end when the mold is closed, an additional mold section adapted to close said open end of the chamber and having moans to support a core en-l veloped in a layer of impression receiving and retaining material, and means for operating the mold sections to bring the same -simultaneously into impression producing relation with said material and to confine said material substantially entirely between the several mold sections and said core.

6. A-molding apparatus comprising stationary and movable mold sections having compleinantary cavities to form a chamber open at one end when the mold is closed,va movably mounted support for the material to be molded, and means carried by the movable ymold section adapted to cooperate with means on said movable support to move the latter relative to the walls of said chamber as the mold is closed.

7 A molding apparatus of the class de-` scribed, comprising stationary and movable mold sections having opposed mold cavities, relatively movable means for supporting the open end of a hollow core Within said cavities, means associated therewith vfor inten" lLiao J. GRUMAN.

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