MXPA00003100A - A method of molding a peripherally encapsulated product under heat and pressure utilizing sheet molding compound (smc) or bulk molding compound (bmc), and the peripherally encapsulated product - Google Patents

Abstract

A peripherally encapsulated product (16), such as an oven door outer shell, is molded in accordance with this invention by placing a piece of glass (18) between mold clamping portions of relatively movable closed bodies when the latter are in an open position. Preferably both bodies are heated and thermosetting polymeric material (SMC or BMC) is placed upon selected areas of one of the mold bodies within and about an area corresponding to an annular mold cavity and outboard of a peripheral edge of a piece of glass. The glass is clamped between mold clamping portions of the mold bodies which are then progressively closed creating

Description

A METHOD FOR MOLDING A PRODUCT PERIPHERALLY ENCAPSULATED UNDER HEAT AND PRESSURE USING A COMPOSITE OF SHEAR MOLDING (SMC) OR A COMPOUND OF BULK MOLDING (BMC), AND THE PERIPHERALLY ENCAPSULATED PRODUCT OBTAINED BACKGROUND OF THE INVENTION It is a conventional method to insert a small crystal or piece of glass into a cavity of a multi-part mold and to inject therein at elevated temperature and pressure a polymeric / copolymeric material peripherally encapsulating the peripheral edge of the glass. A prior injection molding system of this type was used, for example, to manufacture frames for lenses or frames, as disclosed in U.S. Patent No. 2,266,169, in the name of Chester W. Crumrine, which was granted. on December 16, 1941. A lens element is held between two centering plungers, which hold the lens with a peripheral edge thereof projecting towards an annular cavity in which a hot plastic is injected under pressure, cooled and subsequently Removes from the mold cavity in the form of a lens or frame assembly. A similar method of injection molding to form peripherally encapsulated glass pieces is found in U.S. Patent Nos. 2,559,860 and P1 09 / 00MX 3,971,841, granted to Howard G. Fay and León Rubinstein, respectively, on July 10, 1951 and July 27, 1976, respectively. Each of these two patents relates to lens systems for photographic apparatus. In larger glass pieces, a ring, encapsulation or injection molded frame has similarly been provided, as in U.S. Patent Nos. 4,626,185; 4,695,420 and 5,676,894, respectively in the name of Bernard Monnet, Charles E. Grawey et al. and Paul Specht, which were granted respectively on December 2, 1986; on September 2, 1987 and October 14, 1997. These larger encapsulated glass structures are commonly used as curved glass panels for automobiles, printed circuit boards, window panels, structural boards and the like. Another approach to the manufacture of a frame member that encapsulates a peripheral edge of a board is found in U.S. Patent No. 5,329,686 in the name of Maurice A. Kildal et al., Issued July 19, 1994. In this patent, a board is placed between a frame member with an edge thereof located in a recess, while an integral lip or projection of the frame member can be bent a sufficient distance to allow the board to be peripherally clamped in P1Ü09 / 00MX the frame. To date, spectacle rings have been constructed, as shown in United States Patent No. 3,399,018, in the name of Conrad L. Leblanc, issued on August 27, 1968. Prior to the latest disclosures, the material powder was placed in an annular cavity of a mold, in which a piece of tempered glass was inserted and after closing the mold with the glass held and centered therein, the powder material melted and fused at the periphery of the mold. glass. Typical of this process was the use of "Bakelite" powder in the manner disclosed in U.S. Patent No. 2,137,472, issued to Lewis Jex-Blake Forbes, on November 22, 1938. Instead of the powder, which can be molded with heat and pressure, as defined in the aforementioned patent, for years it had been common to use a ring or a ring-type member of elastomeric material to form a seal for bearings or the like, when placing the elastomeric member and a metal reinforcing member in a mold and closing the mold with heat and pressure, as disclosed in U.S. Patent No. 3,341,647, issued September 12, 1967 to J. Aberle. The seal was extruded around the inner periphery of the reinforcing member and is P1209 / 00MX appropriately contoured to provide double lip seals wherein the excess material is squeezed radially outward into a cavity to collect excess unwanted elastomer. A process somewhat similar to the latter is that of the manufacture of elements such as kitchen diaphragms between a pair of coupling molds by inserting therein the diaphragm and, adjacent to an edge thereof, a base material in the form of strip consisting of rubber as the main composition with an associated foaming agent. During molding with heat and pressure in the closed mold cavity, the rubber is vulcanized and defines a foamed self-adhered edge to the outer periphery of the diaphragm, as disclosed in U.S. Patent No. 5,705,108, issued January 6. from 1998 to A. Nonogaki. The assignee of the present invention is skilled in the injection molded encapsulation of tempered glass that is used primarily for shelves, particularly refrigerators, as demonstrated in U.S. Patent Nos. 5,273,354; 5,362,145; 5,403,084; 5,429,433; 5,441,338 and 5,454,638, granted respectively on December 28, 1993; on November 8, 1994; on April 4, 1995; on July 4, 1995; on August 15, 1995 and October 3, 1995, all assigned to the assignee of the present application.

P1209 / 00MX Typically, these encapsulated shelves are manufactured in an injection mold of the type disclosed in Pending Application Serial No. 08 / 303,200, filed September 8, 1994 in the name of Max Meier et al. In this last disclosure, a plate or board of tempered glass has its peripheral edge located in a peripheral or annular cavity, in which a polymeric / copolymer plastic material is injected, hot and very pressurized and after the subsequent cooling, the peripheral edge of the board is limited by a frame, ring or polymeric encapsulation which, because it is intended to be used as a refrigerator shelf, in the same have been integrally joined during the molding, corbels for opposite metal shelf. A stove cover can be manufactured in a manner very similar to that immediately described above and a full disclosure thereof is found in the pending United States Application, assigned jointly, Serial No. 08 / 890,651, filed on September 9, 2000. July 1997 SUMMARY OF THE INVENTION According to the foregoing, a primary object of the present invention is to provide a novel and non-obvious method for manufacturing a peripherally encapsulated unit, such as the P1209 / 00MX oven door of an oven, which during the use is subjected to relatively high temperatures, particularly when the oven will be automatically cleaned at elevated temperatures. The oven doors of a stove are currently made of metal, which has a high degree of rigidity and thermal stability, resists distortion, can withstand abuse, etc. However, the doors of conventional stove ovens are made of many different pieces that require separate formation and fabrication and assembly. These conventional stove oven doors most commonly include a multi-piece internal metal door frame unit and an external oven door shell unit of multiple pieces. The latter are manufactured individually to include an internal metal frame for the oven door and an external oven door shell, each of which has a tempered glass or observation window. A separate metal connection flange is used through which fasteners pass to secure each glass board to its associated frame and / or armor. The external shell is also necessarily primed and painted to match or complement the color of the stove / oven. All this is extremely time consuming and expensive. The patents of the prior art P1209 / 00MX referred to hereinbefore, suggest the manufacture of an oven oven door by injection molding a polymeric / copolymer material with heat and pressure to encapsulate a peripheral edge of a tempered glass sheet. Unfortunately, the polymer / copolymer plastic materials available for injection molding can not maintain the tolerances, particularly if heated at relatively high temperatures. In other words, these materials generally lack a relatively high hot rigidity at temperatures associated with baking and even at relatively low temperatures, the proportion of weight resistance is relatively low, i.e., the polymeric material is relatively weak and lacks the resistance, tenacity and rigidity necessary to support the normal use of the oven door of a stove. In addition, while smaller products can be formed by injection molding a polymeric material around the edge of a piece of glass, larger products create additional manufacturing problems, such as control, reduction or elimination of shrinkage of the product. . Without low or no shrinkage characteristics, essentially it would be impractical, if not impossible, to form an encapsulated polymeric / copolymer furnace door and P1209 / 00MX injection molded, be it an external shell of the oven door or an internal frame of the oven door or both and connect the two with a repetitive precision. The individual contraction of each and the effects of the contraction on the pieces, would essentially prevent either (a) the internal and external encapsulated units from being connected in a coincident manner or (b) that the encapsulated units connect in a manner coincident with its multi-part metallic counterpart to form a commercially acceptable stove oven door. With the foregoing in mind, the applicants have provided with this, a novel and non-obvious method for molding a peripherally encapsulated product, of relatively large size, such as the oven door of an oven and, specifically, the external shell. of the oven door by placing a piece of tempered glass between mold holding portions of the mold bodies when the latter are in an open position. One of the bodies of the mold, and preferably the two, are heated and the polymeric thermosetting material in the form of a sheet molding compound (SMC) or bulk molding compound (BMC - by its acronym in English) is placed on one of the hot mold bodies in and around a P1209 / 00 X area corresponding to a cavity or chamber of the annular or peripheral mold and on the outside of a substantially continuous peripheral edge of the piece of tempered glass. The mold bodies are then progressively closed to thereby create compressive forces, on the SMC / BMC, which extrude the polymeric thermosetting material into the annular chamber and the complete encapsulation of the continuous peripheral edge of the tempered glass, including the surfaces that look opposite and a peripheral edge surface between them. As the bodies of the mold are closed, the surfaces thereof define peripheral seals that prevent the SMC / BMC from escaping from the annular mold cavity and rather, that the SMC / BMC be subjected to the relatively high compression forces, that assure that the cavity of the mold is totally and intimately full. After curing the polymeric thermosetting material with heat and pressure, the mold bodies are opened and the peripherally encapsulated product is removed. The steps of the method just described, when performed together with the appropriate weight and distribution of the polymeric thermosetting material (SMC / BMC) in the associated mold body, ensures the molding of a strong, tough, relatively dense and surface product smooth P1209 / 00MX essentially without visible burrs, burr material, mold dividing lines, voids, etc. In addition, since SMC / BMC can, effectively, be "non-shrinking" compositions, as set forth in U.S. Patent No. 3,947,615, the final product can be easily molded to exact specifications and can easily fulfill its function , preferably, as an external door shell of an oven of an oven, for example. Further, in accordance with the molding method of this invention, the annular mold cavity or chamber is contoured to impart to the external shell of the furnace door an annular front wall which bounds the tempered glass board and which will be unified in shape. integral thereto with the heat and pressure of the "extruded" SMC / BMC thermosetting material, while simultaneously a portion of the chamber forming a flange of the annular mold cavity is filled therewith. mode with "extrudate" with heat and pressure to form a peripheral flange integrally molded. Additionally, the mold cavity is contoured to provide reinforced mamelons that receive the fasteners and reinforcing ribs at the corners of the outer shell of the oven door. In addition, in accordance with the present invention, during the closing of the annular chamber of P1209 / 00MX mold, the opposite surfaces of the portion of the mold cavity that forms the flange thereof meet and form an external "sliding" peripheral seal, which prevents the polymeric material from being "extruded" beyond the cavity ring mold at high molding pressures, resulting in a relatively dense, smooth surface product with precise dimensions. The external shell of the molded furnace door, constructed in accordance with the process of this invention, is thus defined by a single piece of thermally molded thermosetting polymer material, such as SMC or BMC, which forms a member of generally polygonal frame, defined by a front or front wall of a practically annular configuration, arranged substantially transverse to the peripheral wall or flange. The thermosetting polymeric molding compound has a peripheral edge portion "extruded" under pressure further inwardly, which encapsulates a peripheral edge of a piece of tempered glass, which includes opposite peripheral face surfaces and a peripheral edge surface therebetween. . This external oven door shell can serve, for example, as the replacement of an external oven door shell, made of stainless steel, conventional and can be attached to the conventional internal steel frame P1209 / 00 X by means of conventional threaded fasteners or screwed in the strengthened mamelons receiving the fasteners and molded integrally in the corners of the polygonal frame member. The reinforcing ribs ensure rigidity to the furnace door of an oven and / or to the outer shell of the same during a prolonged useful life. With the foregoing objects as well as other objects which will appear below, the nature of the invention will be understood more clearly with reference to the following detailed description, the appended claims and the various views illustrated in the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a front perspective view of a peripherally encapsulated product, such as the oven door of an oven but preferably the outer shell thereof, and illustrates an annular frame member, generally polygonal, defined by a front or front annular wall and a peripheral flange wherein the front annular wall defines an opening within which a piece of tempered glass is housed. Figure 2 is an enlarged rear perspective view of the peripherally encapsulated product of Figure 1 and illustrates mamelons P1209 / 00MX reinforced, receiving the integrally molded fasteners and reinforcing ribs adjacent the corners of the frame member and a peripheral edge portion inward of the annular wall in an encapsulated grip relationship with the peripheral edge of the part of tempered glass. Figure 3 is a fragmentary and highly enlarged cross-sectional view, taken generally along line 3-3 of the Figure, illustrates details of the front wall, the peripheral flange, a reinforcement rib and one of the mamelons receiving bra from the outer shell of the oven door. Figure 4 is a cross-sectional view, taken through the external shell of Figure 2 and illustrates the manner in which the tempered glass board is retained therein and the fasteners received in the mamelons to attach to the shell external with the internal frame of the stove, of stainless steel, conventional, to which another piece of tempered glass is assembled by means of a clamping ring and the associated fasteners. Figure 5 is a perspective view of a mold in which a peripherally encapsulated product or outer shell of Figures 1 to 4 is molded and illustrates two mold bodies in closed position. Figure 6 is a sectional view P1209 / 00MX transverse, slightly enlarged, looking down along line 6-6 of Figure 5 and illustrating a spring-pushed float, centrally located and generally polygonal or mold-holding portion of the glass surrounded by an annular, generally outer, mold member having an upper surface on which four SMC / BMC stacks or blocks or equivalent thermosetting polymer material are placed. Figure 7 is a cross-sectional view, taken generally along line 7-7 of Figure 5 and illustrates an upper mold body in closed relation to a lower mold body and defining therein an annular cavity of mold with a piece of tempered glass held between a portion of the central holder mold of the upper mold body and the float of the lower mold body inherent to the molding of the outer shell during which the SMC (or BMC) is compression molded. extrusion in the configuration of the external shell, illustrated more specifically in the drawings of Figures 2, 3 and 4. Figure 8, which appears in the sheet of the drawing containing Figure 4, is a fragmentary and fragmentary cross-sectional view. enlarged, taken generally along the line 8-8 of Figure 6 and illustrates details of the mold bodies so that each forms the reinforced bead mamelon, P1209 / 00MX that receives the bra, in each corner of the external shell. Figure 9 is a vertical, fragmentary, enlarged cross-sectional view of the right side of the mold illustrated in Figure 7, in the open position and illustrates the float in its secured position, a piece of tempered glass rests on the float and the SMC supported on an upper annular surface of the lower mold body. Figure 10 is a cross-sectional view of the mold, practically identical to Figure 9 and illustrates the upper mold body which is closed, which causes the heated SMC material to be compressed / extruded throughout the mold cavity which closes in progressive shape and a peripherically more external "sliding" seal, defined between the contacting mold surfaces to prevent the SMC from being extruded beyond a terminal edge of the peripherally outermost flange forming the mold cavity portion. Figure 11 is a fragmentary cross-sectional view, similar to Figures 9 and 10 and illustrates the fully enclosed mold bodies, during the SMC thermosetting at elevated temperature and pressure. Figure 12 is a fragmentary cross-sectional view of the mold, similar to the P1209 / 00MX Figures 9, 10 and 11 of the drawings with the securing bolt retracted and removed from the position illustrated in Figure 9 and illustrate the expulsion of the cured external shell by the upward movement of the float under the influence of a multitude of ejector springs. Figure 13 is a greatly enlarged cross-sectional view of the mold bodies in the closed position thereof, which corresponds to the position shown in Figure 11 and illustrates enlarged details of the surfaces defining the mold cavity without SMC / BMC in it. Figure 14 is an enlarged and fragmentary view of the mold bodies approaching the closed position thereof, which corresponds to Figure 10 and illustrates the manner in which the piece of tempered glass is supported above an upper surface of the float in a semi-round or rounded annular cushion ring, housed in an annular channel that opens up from the float. Figure 15 is a fragmentary and highly enlarged cross-sectional view of the encircled portion of Figure 14 and illustrates the tempered glass board raised above a float surface and in a dotted outline, the fully compressed position of the ring of cushioning fully accommodated within your P1209 / 00 X associated upward opening channel. Figure 16 is a fragmentary cross-sectional view, similar to Figure 11, and illustrates another embodiment of the invention, in which the mold bodies, upper and lower, are delineated to form a handle or handle integrally molded into a wall front of another external shell of the oven door of the invention. Figure 17 is a cross-sectional view of the mold of Figure 16 and illustrates the mold in the open position, inherent in ejection and withdrawal from the outer shell.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES A peripherally encapsulated product, molded in accordance with this invention, is illustrated in Figures 1, 2 and 3 of the drawings and, in general is designated by the reference number 10. The peripherally encapsulated product 10 is a furnace door of an oven but, more specifically and preferably, an external shell 10 of a furnace door, which is attached to a conventional metallic internal door frame 9 unit (Figure 4) of a construction conventional, which will be described later in greater detail. The outer shell 10 of the oven door is P1209 / 00MX comprised as an integral and virtually single homogeneous piece of thermosetting polymeric material (SMC or BMC) molded by hot compression forming an annular frame member 11, generally polygonal, defined by a front annular wall 12 and a wall or peripheral flange 13. The front wall 12 is placed substantially transverse or normal to the wall or peripheral flange 13 and near or borders the same around its entire periphery. A piece of generally polygonal, square or rectangular tempered glass or a glass board 15 closes an opening 16, defined by an innermost polygonal edge portion 17 of the front wall 12. A peripheral edge 18 (Figures 4, 11 and 12) of the tempered glass board 15, is completely encapsulated by the innermost peripheral edge portion 17 of the front wall 12 and is defined by a portion of the outermost fence or curb, flange or edge 21 (Figures 4, 11 and 12), a portion of fence or innermost rim, flange or edge 23 and a peripheral joint portion 22 therebetween. In each of four substantially identical corners 24 of the annular frame member 11, there are means 25 (Figures 2, 3 and 8) in the form of cylindrical mamelons projecting inward and receiving the fasteners to receive threaded form in the cylindrical holes 26 of the P1209 / 00MX mamelons to the conventional fasteners F (Figure 4) that join the external shell 10 of the oven door to the internal unit or frame 9 of the oven door. The means 27, in the form of an inwardly directed reinforcing rib, is provided at each corner 24 of the annular frame member 11 and extends substantially between each mamelon 25 and an associated inward corner 28 (FIG. 2) of the edge portion. innermost polygonal 17 of the front wall 12. One or more relatively elongated ventilation slots 30 (Figures 1 and 2) may be formed posteriorly in the upper and lower (unnumbered) portions of the peripheral flange 13, if they are found to be necessary or desirable. Additionally, holes 31 (Figures 1 and 2) may be formed in the front wall 12 during the molding of the annular frame member 11 or, subsequently formed therein for the reception of the fasteners securing the handle (not shown) in the outer shell 10. Instead of the latter, the mold bodies that will be described below, can be appropriately contoured to integrally mold a handle from a portion of the material of the front wall 12. As best illustrated in FIG. Figure 4, the internal frame unit 9 of the conventional oven door includes a polygonal annular frame Internal P1209 / OOMX 33 having four generally hollow legs 32, through which the fasteners F pass by self-tapping in the holes 26 of the mamelons 25 (Figure 3). The inner frame 33 has an outermost annular flange 34 directed radially inward against which a peripheral edge 29 of a piece of tempered glass or glass board 35 rests or abuts with a seal 36 which is sandwiched between them. An annular clamping collar 37 is fixed to the annular flange 34 of the internal frame 33 by conventional fasteners Fl. Although not illustrated, the conventional oven door inner frame unit 9 is conventionally secured to the pivot arms of an oven, which are normally pivoted, counterbalanced and / or spring-loaded for pivoting movement between the positions of open oven door and closed oven door. In the closed position of the oven door, the interior of the oven (not shown) can, of course, be viewed through the tempered glass pane or board 15 of the door shell 10 and the tempered glass board 35 of the door. internal frame unit 9 of the oven door. In Figures 5 to 7 and 9 to 14 of the drawings there is illustrated a machine for molding the external shell 10 of the oven door with heat and pressure to P1209 / 00MX starting from the SMC or the BMC thermosetting and, in general, is designated by the reference number 50. The molding machine 50 includes a multi-part mold, defined by at least two relatively movable mold bodies, namely a lower mold body 51 and an upper mold body 52 which between them define in a closed position an annular cavity or mold chamber 60, generally polygonal (Figures 6, 7, 13 and 14). The lower mold body 51 is machined appropriately to define an annular mold chamber projecting upwards in a general manner and defining a member 61 defined by an internal polygonal surface 62 (Figures 6, 7 and 13), a surface outer polygon 63, forming the flange (Figure 13), ending in an annular end face 64 facing upwards and opposite thereto a surface of radius 65 which joins an upper annular surface 66, relatively flat. The upper annular surface 66 is mixed with an innermost radius surface 67 (Figure 13) which in turn joins the innermost peripheral annular surface 68. The surface 68 is in turn joined to the annular surface 69 that looks upwards, same that lies in a horizontal plane displaced from the horizontal plane of the annular surface 66 but, generally parallel to said plane.

P1209 / 00MX The surface 63 is flared or rounded approximately 3o from a plane Pvo vertically further outwards (Figure 13) outwardly thereof, while the surface 68 is flared similarly 3o from a vertically innermost Pvi plane (Figure 13) inside it. In other words, the surfaces 63 and 68 of the respective planes Pvo and Pvi thereof are in a relationship that converges upwardly with one another, which creates peripheral seals inwardly and outwardly, as will be described later in more completely, to prevent the SMC / BMC from being ejected from the mold chamber or annular cavity 60, even before the molding bodies 51 and 52 reach their fully closed position (Figures 7 and 11) - A float or plate 70 rectangular or generally polygonal fastener (Figures 6, 7 and 13) is mounted for vertical sliding movement within the so-called insert pocket (not numbered), defined partially by the surface 62 of the mold chamber defining the member 61. An outer peripheral surface 72 of the float 70 is in an intimate sliding relationship with the surface 62 of the mold chamber defining the member 61 and partially functions to close a porc ion of the chamber or cavity portion 79 peripherally innermost of the chamber or cavity P1209 / 00 X annular 60 of the mold, immediately adjacent to an uppermost holding surface 74 of the float 70. The surface 74 of the float or holding plate 70 supports the tempered glass board 15 during the molding of the outer shell 10 of the oven door, as will be described later in greater detail. A multitude (six) of identical springs 80 (Figures 6, 7 and 12) normally push the float 70 towards a position in which the upper surface 74 thereof is well above the surface 66 when the bodies 51 and 52 of the mold they are open, as illustrated in the product ejection position of Figure 12 of the drawings. This figure corresponds to the loading position, except that, of course, the space between the bodies of the mold is empty. However, before placing the piece of tempered glass 15 on the surface 74 of the float 70, the float 70 is retracted against the thrust of the springs 80 in a conventional manner, by, for example, the placement of an insert or gauge ". simulated "on the upper surface 74 of the float 70 corresponding in thickness to the thickness of the glass panel 15, closing the bodies 51 and 52 of the mold and manually or automatically moving the securing bolts 91 and 92, diametrically opposed (Figures 7 and 9 to 11) to their respective recesses or P1209 / 00MX securing recesses 93 and 94 of the float 70. The mold bodies 51 and 52 are then opened, the gauge is removed from them and subsequently the molding can be initiated by inserting the tempered glass board 15 on the surface 74 of the float 70, as will be described more fully below. At each corner (not numbered) of the mold chamber defining the member 61, and partially defining the cavity 60, there is provided a borehole 85 of frusto-conical shape that opens upwards (Figures 6 and 8), which is fused with a cylindrical bore 86 in each of which is placed a cylindrical rod 87 stationary or movable, having a reduced cylindrical end portion 88, above the annular face 89. The frusto-conical surface 85, the cylindrical portion 88 and the annular face 89 cooperatively form each of the cylindrical mamelons 25, integrally molded and receiving the associated fasteners and holes 26 (Figure 3) of the frame member 11 during molding thereof. The diagonal grooves 96 that open upwardly (Figure 6) open through the upper annular surface 66 of the mold chamber defining the member 61 and molding therein the reinforcing ribs 27 (Figure 2) of the member. of frame 11, with the operation of the molding machine 50.

P1209 / 00MX The upper mold body 52 defines the "female" cavity portion of the annular mold cavity 60 and is defined from the center outwardly by a clamping surface or holding portion 101, generally annular (Figures 6, 7 and 13), parallel to the clamping surface 74 of the float 70, which collectively define the means for clamping between them the tempered glass board 15. The annular surface 101 fuses with the peripheral surface further inwardly. , which is fused with a surface of radius 102, which itself fuses with a relatively flat annular surface 103, parallel to the surface 66 of the inner mold body 51 but separated from it and cooperating therewith to form the front wall 12 of the external shell 10 of the oven door. The annular surface 103 fuses with the radius surface 104 adjacent to and spaced from the radius surface 65, which in turn fuses with a peripheral surface 105, substantially parallel to the surface 63, which includes the angular displacement of 3 °. with the vertical and that lies in a Pro plane parallel to the Pvo plane. The molding machine 50 includes the shims 121 and 122 (Figures 9 to 11) carried by the respective lower mold body 51 and upper mold body 52 to achieve the precise dimensioning of the P1209 / 00MX mold cavity, particularly between the surfaces 66, 103 and 74, 101 to admit the molding of different thicknesses of the respective front wall 12 of the external shell 10 and different thicknesses of the tempered glass board 15 associated thereto. To replace or add or change these shims 121 and 122, conventional fasteners 123 (Figure 7) are used, as may be found to be necessary or desirable. A hot fluid, such as, for example, an oil, preferably at 475 ° F, is introduced into the lower mold body 51 of the mold 50, by means of a flexible tube 130 and circulated through the ports (not numbered ) in the lower mold body 51 emerging from them through the flexible tube 131. Similarly, a hot fluid is introduced into the upper mold body 52 of the mold 50, through a flexible tube 132, it is circulated through the ports (not numbered) of the upper body 52 and discharged through another flexible tube 133. An identical fluid motor means 140 (Figures 5 and 6) in the form of piston / cylindrical motors, are connected in a conventional manner between the mold bodies 51 and 52 and operate thereto making them reciprocate between the fully closed position (Figures 5, 7, 8 and 11) and the fully open position (Figure 12) throughout P1209 / O0MX of a reciprocal travel path Rpt (Figure 13). The securing pistons 91 and 92 are preferably held in their secured positions, respectively, by dogs 161 and 162 manually rotated (Figure 5) although each plunger 91 and 92 can be moved and removed pneumatically from the respective conical recesses 93 and 94 in a clearly evident form from the drawings and, in particular, of Figure 7. Finally, the upper surface or clamping surface 74 of the float 70 is provided with an annular recess or channel 170 that opens upwards (FIGS. and 15), which houses a resilient cushion ring 171 semi-round or rounded, which in the open position of the mold bodies-51 and 52 (Figures 14 and 15) supports the lower (unnumbered) surface of the tempered glass board 15, slightly above the surface 74. The purpose of the annular cushion ring or cushion 171 is to provide the gradual application of the clamping forces against the dashboard. tempered glass 15, during the closure of mold bodies 51 and 52 to prevent glass breakage, as might otherwise occur if the tolerances were slightly "different". However, by virtue of the cushion ring 171, according to the clamping surface P1209 / 00MX 101 of the upper mold body 52 moving downwardly contacts and initially exerts a downward closing force against the tempered glass board 15, the cushion ring 170 is compressed and the clamping forces between the surfaces 74 and 101 are thus applied progressively against the glass board 15 until the moment when the cushion ring 171 is fully seated in the channel 170 (Figure 13). Obviously, regardless of the cross section of the cushion ring 171, it must be equal to or less than the cross section of the channel 170 to be fully received therein when fully compressed (dotted outline of Figure 15).

METHOD OF OPERATION It is assumed that the molding machine 50 is heated, preferably heating the two upper and lower mold bodies, 51 and 52, by circulating through them (and through the float 70, if it is thought to be necessary or desirable) hot fluid (oil) in the manner described above. It is also assumed that the bodies 51 and 52 of the mold are in the open position, wherein the securing bolts 91 and 92 hold the float 70 in the "down" position shown in Figures 7, 9 and 11 of the P1209 / 00MX drawings. The tempered glass board 15 is then manually or automatically placed on the cushion ring 171, as shown in Figure 9, which maintains a lower (unnumbered) surface of the tempered glass board 15 slightly spaced above the clamping surface 74 of the float 70, as illustrated in Figures 14 and 15. The sheets of the SMC thermosetting (Figures 6 and 9) are then placed on the upper annular surface 66 of the mold chamber defining the member 61 of the lower mold 51, substantially centrally thereto, outwardly of the intermediate peripheral surface 68 and inwardly of the outermost peripheral surface (Figure 9). The number of sheets of the SMC, the thickness or thickness of the same, the lengths and widths, the location and orientation on the upper surface 66 and the total weight depend on several factors but mainly among these is the assurance that the total volume Uncompressed all the sheets of SMC corresponds in volume to the total volume of the chamber or mold cavity 60 fully closed, to ensure that the SMC is compression molded / extruded in a progressive and correct way with heat (475 ° F) and pressure (psi) with the closure of mold bodies 51 and 52 in a form P1209 / 00MX predetermined so that they fully consolidate within all portions of the annular die cavity 60 without gaps, leaks, scratches, etc. As the means 140 moving the body of the mold moves the mold bodies 51 and 52 towards each other along the travel path Rpt, which is normal to surfaces 66, 74, 101 and 103 and to the piece of glass 15, the heat and pressure applied in this manner to the SMC begins to melt, homogenize and laterally flow or extrude the SMC in and out in the manner best illustrated in Figure 10 of the drawings. Referring in particular to Figures 10 and 13, the 3 o of the exit angle or demolding tilt of the flange-forming annular surfaces 63, 63 'and 105 of the respective mold bodies 51 and 52 come into contact and create a intimate peripheral seal S (Figures 10 and 13) around the entire periphery of the outermost portion of the annular mold chamber 60. The forming surface 105 of the outer flange essentially comes into contact with the corner (not numbered) defined between the surface 63 'and the annular surface 64 facing upwardly form and maintain the seal S substantially in the relative position of the mold bodies 51 and 52 illustrated in Figure 10 and maintain (and expands the axial length) the peripheral seals until the mold bodies 51 and 52 close P1209 / 00MX completely (Figures 11 and 19). In this way, during the continuous movement of the mold bodies 51 and 52, one towards the other, the SMC is extruded or caused to flow radially outwardly between the surfaces 66, 103; 65, 104; 63, 105 and splice no further than the annular surface 64 facing upwards, eventually forming the peripheral flange 13 without any leakage of the SMC beyond the annular seal S, as shown in Figure 11. From the position of the bodies of mold 51 and 52, shown in Figure 10, until complete closure thereof, shown in Figure 11, the SMC continues to extrude or flow both inwardly and outwardly, towards the frusto-conical recesses 85 (Figures 6 and 8) and the channels 96 forming the rib (Figure 6) until afterwards, the annular surface 101 (Figure 10) comes in contact with the upper (unnumbered) surface of the tempered glass board 15. Prior to this surface-to-surface contact, the SMC has not flowed, under the closing pressure of the mold bodies 51 and 52, to the left beyond the surfaces 62, 72 and 99. However, during the final closing of the mold bodies 51 and 52, during which the cushion ring 171 is compressed (Figure 13), the final relative closing movement between the mold bodies 51 and 52 extrudes the SMC towards the peripheral mold cavity portion further Internal P1209 / 00MX 79, generally defined by surfaces 68, 69, 72, 99 and 102. The SMC material extruded in this way to the newly defined capacity portion 79 completely encapsulates the edge 18 (Figures 4, 7 and 12) of the tempered glass board 15 and binds intimately to it, by means of the flange portions 21 and 23 and the peripheral joint or joint portion 22 between them (Figure 4). The SMC (or BMC) material is cured with the applied heat and pressure from the closed mold bodies 51 and 52 and once it is cured, the securing dogs 161 and 162 are pivoted 90 ° to release the bolts or pistons of assurance 91 and 92, respectively, manually or automatically. The means 140 moving the mold is then operated to progressively move the mold bodies 51 and 52 from the closed position (Figure 11) to the fully open position (Figure 12) and at that precise moment, the springs 80 push the float 70 upward to its "raised" position, which automatically strips or ejects the cured outer shell 10 (Figure 12) from the mold annular cavity 60 now open. The outer shell 10 is removed, the float 70 is moved back to the "down" position, shown in Figure 7, automatically or manually, described above and secured in that position by the securing bolts 91 and 92 and a new one is placed P1209 / 00MX piece of tempered glass on the annular surface 74 of the float 70 where the SMC or the BMC is again placed appropriately on the annular surface 66 of the lower mold 52 inherent in the molding of another external shell 10. The outer shell 10 it is then assembled in an internal door frame unit 11 in the manner previously described with respect to Figure 4 of the drawings. The entire oven door (generally number 10 in Figure 4) is appropriately attached and in a conventional manner to the oven door arms conventionally pivoted by springs / counterweights of a conventional oven. Before assembling the outer shell 10 and the inner frame unit 9 of the oven door, on the peripheral flange 13 of the outer shell 10 of the oven door, ventilation slots 30 can also be subsequently formed, as indicated above and, if desired, with the holes or holes 31. The obvious details of the outer shell 10 can be varied, such as providing on the front wall 12 an integrally molded handle, formed during the molding process just described and varying, of course , the size of the opening 16 in the front wall 12. Obviously, the color of the SMC / BMC can be varied to complement the particular oven / stove to which the P1209 / 00MX door as a whole (usually number 10). Likewise, although the internal frame unit 9 of the oven door is peripherally exposed in Figure 4, the flange 13 of the outer shell 10 can be molded longer than illustrated to fully encapsulate and peripherally be fully bonded to the internal frame unit 9 of the oven door, which could be aesthetically pleasing, depending on the specifications of the stove or appliance to which the oven door will be associated (generally number 10). The molding can also be altered to some degree of what has been described, with the same general result when opening, for example, the mold bodies 51 and 52; releasing the plungers 91 and 92 and keeping the float 70 pushed with springs upwards in the position shown in Figure 12, during loading of the tempered glass sheet 15 on the float and the application of the SMC on the surface 66. The mold bodies 51 and 52 would then move relatively relative to each other during the time when the surface 101 of the upper mold body 52 would contact the upper (unnumbered) surface of the tempered glass board 15. When continuing with the movement of gradual closing between the mold bodies 51 and 52, will eventually result in compression of the cushion ring 171 in the annular channel 170 that is P1209 / 00MX opens upwards, resulting in the grip / clamping of the thermal glass board 15, between the surfaces 101 and 74. At this point of the closing operation, the SMC (or the BMC) on the upper surface 66 of the body of lower mold 51 has not come into contact with the upper annular surface 66 of the upper mold body 52. However, as the mold bodies 51 and 52 continue to progressively approach the annular mold chamber 60, the float 70 and the board of tempered glass 15 will descend to the final position thereof (Figure 7). The SMC is eventually contacted, compressed and extruded during the final closing movement of the mold bodies 51 and 52, which results in the eventual formation of the annular seal S which occurs after, of course, the most into the interior of the mold annular chamber 60 has been completely closed practically at the instant of the clamping contact of the tempered glass panel 15 between the surfaces 74 and 101. Therefore, with the continuation of the progressive closing of the annular cavity of mold 60, the SMC can not be extruded beyond the innermost surfaces 72, 99 and 102 and as the closure continues, the SMC can not be extruded beyond the outermost terminal portion of the mold, because the peripheral seal S, which remains in operation until the mold bodies 51 and 52 are closed P1209 / 00MX completely. The securing pistons 91 and 92 can then be moved to the recesses or latching slots 93 and 94, respectively, to the position shown in Figure 7, until the curing is complete (approximately 2 to 3 minutes at 400 ° C). F-525 ° F, preferably, 475 ° F, temperature of the surface of the mold heated with oil). At the end of curing, the securing pistons 91 and 92 are retracted from the engaging recesses or holes 93 and 94, respectively, and the mold bodies 51 and 52 are relatively open by movement along the Rpt travel path. with the resultant expulsion of the outer shell 10 by the upward movement of the float 70 thanks to the force of the springs 80 in the manner described above. Reference will be made to Figures 16 and 17 of the drawings, which illustrate another molding machine 50 ', which is practically identical to the molding machine 50 described above and thus includes prime numbers to identify identical components. The molding machine 50 'includes a multi-part mold, defined by a lower mold body 51' and an upper mold body 52 ', which between them define in the closed position, an annular mold cavity or chamber 60', generally polygonal.

P1209 / 00MX The lower mold body 51 'is essentially identical to the lower mold body 51 and, as best illustrated in Figure 17, includes identical surfaces 63' to 69 'defining the cavity. However, the surface 66 'is interrupted by a male portion of the mold 200 that forms the handle and projects upwards, defined by a relatively straight surface 201, located at a slightly obtuse angle toward the innermost portion of the surface 66. and a curved surface 202. The surfaces 201 and 202 extend longitudinally along the upper portion of the front wall 12 'of the external shell 10', optionally formed (Figure 17) and the distance of this extension dictates the length of a handle 205 integrally molded. For example, the mold portion 200 that forms the handle can have a length corresponding to the distance between the openings 31 and 31 (Figures 1 and 2), which results in the formation of the handle 205 integrally molded (Figure 17) that corresponds in length to the distance between the openings 31 and 31. However, because the handle 205 is integrally molded, the upper wall 12 '(Figure 17) would be devoid of the openings 31, which will be they become unnecessary due to the integral molding of the handle or handle portion 205. The upper mold body 52 'is formed P1209 / 00MX of two mold parts or mold portions, namely, an outer annular mold part 52"and an internal annular polygonal mold part 52" 'having the respective surfaces 206 and 207, which in the closed position of the mold bodies 51 'and 52' abut each other and abut the surface 201 of the mold portion 200 of the handle. In the open position of the mold 50 '(Figure 17), the appropriate SMC / BMC thermosetting material sits on top of the surface 66' both to the left and to the right of the mold portion 200 for forming the handle. This thermosetting material can also be placed along the surface 202 adjacent its junction with the surface 66 'but, the specific location of the SMC is such that, with the closure of the mold cavity 60' (Figure 16), the SMC material will be compression molded and will be extruded in the manner described above with respect to the mold 50 and, of course it will also completely fill the portion of the handle forming chamber 210, defined by the surface 202 of the forming mold male portion 200 of the handle and of a female cavity surface 211 contoured in a complementary fashion to the mold part 52". While different compositions of SMC and BMC can be used in conjunction with the present invention, those reduced to the practice by P1209 / 00MX part of the assignee of the present invention specifically include SMC 1840, manufactured by Bulk Molding Compounds, Inc. of 1600 Powis Corp., West Chicago, Illinois 60185. The BMC material reduced to the practice in accordance with this invention is BMC 130, also available from Bulk Molding Compounds, Inc. Although the preferred embodiments of the invention have been specifically illustrated and described herein, it will be understood that minor variations may be made to the method and article without deviating from the spirit and scope of the invention, as defined in the appended claims.

P1209 / 00MX

Claims (82)

1. NOVELTY OF THE INVENTION Having described the present invention, it is considered as a novelty and, therefore, the content of the following CLAIMS is claimed as property; A method for molding a peripherally encapsulated product, comprising the steps of: (a) providing a multi-part mold including at least two relatively movable mold bodies, which in the closed position thereof define a mold chamber ring virtually continuous and opening into and into the ring mold chamber opposing mold holding portions, (b) placing a piece of glass between the mold holding portions when the mold bodies are in the position open, (c) heating at least one of the mold bodies, (d) placing the polymeric thermoset material in the hot mold body in and around an area corresponding to the annular chamber and outward from a substantially continuous peripheral edge of the piece of glass, (e) holding the piece of glass between the mold holding portions, (f) moving in a relatively progressive way P1209 / 00MX the mold bodies towards their closed position to thereby create compressive forces which extrude the polymeric thermosetting material towards the annular chamber and towards the complete encapsulation of the continuous peripheral edge, including the opposite face surfaces and the surface of peripheral edge between these, (g) curing the polymeric thermosetting material with heat and pressure while the mold is in its closed position, (h) relatively moving the mold bodies towards their open position, and (i) withdrawing from the chamber of the mold. mold to peripherally encapsulated product.
2. 2. The product encapsulation method according to claim 1, wherein the polymeric thermosetting material is a sheet molding compound (SMC - for its acronym in English).
3. 3. The product encapsulation method according to claim 1, wherein the polymeric thermosetting material is a bulk molding compound (BMC - for its acronym in English). The product encapsulation method according to claim 1, wherein the mold bodies additionally define a portion of the flange-forming chamber, practically towards the exterior of the annular chamber of the mold and surrounding it and, during the development step (f), the material Polymeric thermosetting P1209 / 00MX is extruded into the flange forming chamber portion, thereby providing the peripherally encapsulated product with an integrally molded peripheral flange. The product encapsulation method according to claim 1, wherein at least one of the mold bodies further defines a handle forming chamber portion, which extends along one side of the annular mold chamber and during the development of step (f) the polymeric thermosetting material is extruded into the handle forming chamber portion, to thereby provide the peripherally encapsulated product with an integrally molded handle. The product encapsulation method according to claim 1, wherein at least one of the mold bodies further defines a plurality of reinforcing rib forming chamber portions, located in a spaced-apart relation and extending substantially transversely to the annular mold chamber and, during the development of step (f), the polymeric thermosetting material is extruded into the rib-forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of P1209 / 00MX integrally molded reinforcement ribs. The product encapsulation method according to claim 1, wherein at least one of the mold bodies further defines a multitude of fastener-receiving mamelon-forming chamber portions., located in a separate relationship with each other and during the development of step (f), the polymeric thermosetting material is extruded into the mamelon-forming chamber portions, thereby providing the peripherally encapsulated product with a multitude of integrally molded mamelons, receiving receivers. 8. The product encapsulation method according to claim 1, wherein the annular mold chamber has a generally polygonal configuration. 9. The product encapsulation method according to claim 1, wherein the annular mold chamber has a generally polygonal configuration and includes corner forming chamber portions and during the development of step (f), the polymeric thermosetting material is Extruded into the corner forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of integrally molded corners. 10. The product encapsulation method, P1209 / 00MX according to claim 1, wherein the movements of steps (f) and (h) occur along a travel path that is practically normal to a plane of the piece of glass. The product encapsulation method according to claim 1, wherein the movements of steps (f) and (h) occur along a travel path that is practically normal to a plane of the piece of glass, the mold bodies further define a portion of the eyelash-forming chamber, practically towards the exterior of the annular mold chamber and surrounding it and practically parallel to the travel path but, released at an acute angle mainly small to the trajectory of the trip, during the development of step (f), the polymeric thermosetting material is extruded into the portion of the eyelash-forming chamber, to thereby provide the peripherally encapsulated product with an integrally molded peripheral flange and, during movement of the body mold of the steps (f), the portion of the eyelash-forming chamber is sealed to the closure before the total extrusion therein of the polymer material thermosetting ico. 12. The product encapsulation method according to claim 2, wherein the mold bodies further define a portion of the flange-forming chamber, practically toward the outside. P1209 / 00 X of the annular chamber of the mold and surrounding it and, during the development of step (f), the polymeric thermosetting material is extruded towards the portion of the flange-forming chamber, thereby to provide the product peripherally encapsulated an integrally molded peripheral flange. The product encapsulation method according to claim 2, wherein at least one of the mold bodies further defines a portion of the handle forming chamber, which extends along one side of the ring mold chamber and during the development of step (f) the polymeric thermosetting material is extruded into the handle forming chamber portion, to thereby provide the peripherally encapsulated product with an integrally molded handle. The product encapsulation method according to claim 2, wherein at least one of the mold bodies further defines a plurality of reinforcing rib forming chamber portions, located in a spaced-apart relation and extending substantially transversely to the annular mold chamber and, during the development of step (f), the polymeric thermosetting material is extruded into the rib-forming chamber portions, so as to P1209 / 00MX thus provide the peripherally encapsulated product with a multitude of integrally molded reinforcing ribs. 15. The product encapsulation method according to claim 2, wherein at least one of the mold bodies additionally defines a multitude of fastener-receiving mamelon-forming chamber portions, located in a separate relationship with each other and during development. of step (f), the polymeric thermosetting material is extruded into the mamelon-forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of integrally molded mamelons, fastener receptors. 16. The product encapsulation method according to claim 2, wherein the annular mold chamber has a generally polygonal configuration and includes corner forming chamber portions and during the development of step (f), the polymeric thermosetting material is Extruded into the corner forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of integrally molded corners. 17. The product encapsulation method according to claim 3, wherein the mold bodies additionally define a chamber portion. P1209 / 00MX flange former, practically towards the exterior of the annular chamber of the mold and surrounding it and, during the development of the step (f), the polymeric thermosetting material is extruded towards the portion of the flange forming chamber, for thereby providing the peripherically encapsulated product with an integrally molded peripheral flange. 18. The product encapsulation method according to claim 3, wherein at least one of the mold bodies further defines a portion of handle forming chamber, which extends along one side of the ring mold chamber and during the development of step (f) the polymeric thermosetting material is extruded into the handle forming chamber portion, to thereby provide the peripherally encapsulated product with an integrally molded handle. 19. The product encapsulation method according to claim 3, wherein at least one of the mold bodies further defines a plurality of reinforcing rib forming chamber portions, located in a spaced relation to each other and extending substantially transversely to the annular mold chamber and, during the development of step (f), the polymeric thermosetting material is extruded into the P1209 / 00MX portions of rib-forming chamber, to thereby provide the peripherally encapsulated product with a multitude of integrally molded reinforcing ribs. 20. The product encapsulation method according to claim 3, wherein at least one of the mold bodies additionally defines a multitude of fastener-receiving mamelon-forming chamber portions, located in a separate relationship with each other and during development. step (f), the polymeric thermosetting material is extruded into the mamelon-forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of integrally-molded mamelons, receiving fasteners. 21. The product encapsulation method according to claim 3, wherein the annular mold chamber has a generally polygonal configuration and includes corner forming chamber portions and during the development of step (f), the polymeric thermoset material is Extruded into the corner forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of integrally molded corners. 22. The product encapsulation method according to claim 4, wherein at least one of P1209 / 00MX the mold bodies additionally defines a portion of the handle forming chamber, which extends along one side of the annular mold chamber and during the development of the step (f) the polymeric thermosetting material is extruded into the handle forming chamber portion, to thereby provide the peripherally encapsulated product with an integrally molded handle. 23. The product encapsulation method according to claim 4, wherein at least one of the mold bodies further defines a plurality of reinforcing rib forming chamber portions, located in a spaced relation to each other and extending substantially transversely to the annular mold chamber and, during the development of step (f), the polymeric thermosetting material is extruded into the rib-forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of ribs of integrally molded reinforcement. 24. The product encapsulation method according to claim 4, wherein at least one of the mold bodies further defines a multitude of fastener-receiving mamelon-forming chamber portions, located in a separate relationship with each other and during development. step P1209 / 00MX (f), the polymeric thermosetting material is extruded into the mamelon-forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of integrally molded mamelons, receiving grabs. 25. The product encapsulation method according to claim 4, wherein the annular mold chamber has a generally polygonal configuration and includes corner forming chamber portions and during the development of step (f), the polymeric thermoset material is Extruded into the corner forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of integrally molded corners. 26. The product encapsulation method according to claim 23, wherein at least one of the mold bodies additionally defines a handle forming chamber portion, which extends along one side of the annular mold chamber and during the development of step (f) the polymeric thermosetting material is extruded into the handle forming chamber portion, to thereby provide the peripherally encapsulated product with an integrally molded handle. 27. The product encapsulation method, P1209 / 00MX according to claim 24, wherein at least one of the mold bodies additionally defines a handle forming chamber portion, which extends along one side of the annular mold chamber and during step development ( f) the polymeric thermosetting material is extruded into the handle forming chamber portion, to thereby provide the peripherally encapsulated product with an integrally molded handle. The product encapsulation method according to claim 25, wherein at least one of the mold bodies further defines a handle forming chamber portion, which extends along one side of the ring mold chamber and during the development of step (f) the polymeric thermosetting material is extruded into the handle forming chamber portion, to thereby provide the peripherally encapsulated product with an integrally molded handle. 29. The product encapsulation method according to claim 26, wherein the annular mold chamber has a generally polygonal configuration and includes corner forming chamber portions and during the development of step (f), the polymeric thermoset material is Extrude in the corner forming chamber portions, P1209 / 00MX to thereby provide the peripherally encapsulated product with a multitude of integrally molded corners. 30. The product encapsulation method according to claim 27, wherein the annular mold chamber has a generally polygonal configuration and includes corner forming chamber portions and during the development of step (f), the polymeric thermoset material is Extruded into the corner forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of integrally molded corners. 31. The product encapsulation method according to claim 27, wherein at least one of the mold bodies additionally defines a plurality of reinforcing rib forming chamber portions, located in a spaced relation to each other and extending substantially transversely to the annular mold chamber and, during the development of step (f), the polymeric thermosetting material is extruded into the rib-forming chamber portions, to thereby provide the peripherally encapsulated product with a multitude of ribs of integrally molded reinforcement. 32. A machine for molding a peripherally encapsulated product, comprising: P1209 / 00MX (a) a multi-part mold including at least two relatively movable mold bodies defining in the closed position an essentially continuous annular mold chamber, which opens inwardly, (b) a means inwardly of the annular mold chamber for holding a piece of glass in a substantially precise relationship with the ring mold chamber opening inwards in the closed position of the bodies of mold, (c) means for heating at least one of the bodies of the mold, (d) a means for moving the clamping means relative to each other to hold a piece of glass between them, (e) a medium to move the mold bodies relative to each other towards the closed position, in which a peripheral edge portion of the glass piece projects into the annular mold chamber and the polymeric thermosetting material located between the bodies of the mold in the open position thereof is subjected to the compression forces of the closed mold bodies, which extrude the polymeric thermosetting material towards the total encapsulated portion. n of peripheral edge of the glass, including the opposite surfaces and the peripheral edge surface between them, and P1209 / 00MX (f) the means that move the mold bodies work to move the mold bodies towards their open position after the polymeric thermosetting material has been cured with heat and pressure while the mold is in its closed position, with what the molded product, peripherally encapsulated, can later be removed from the open mold chamber. 33. The molding machine according to claim 32 includes a means for effecting an outermost peripheral seal between the bodies of the mold before the total closure of the annular chamber of the mold and before the complete extrusion of the polymeric thermosetting material. 34. The molding machine according to claim 32, wherein the mold chamber includes an innermost annular mold chamber portion in which the peripheral edge portion of the glass part and a peripheral mold chamber portion project. outermost located in a relationship substantially transverse to the portion of innermost ring mold chamber. 35. The molding machine according to claim 32, wherein the mold bodies and the fastening means move relatively along a substantially normal travel path to a plane of the glass part. 36. The molding machine according to P1209 / 00MX claim 32, wherein the first of the mold bodies includes an annular mold surface which is joined to a radius mold surface which in turn attaches to a peripheral mold surface, located in a substantially transverse relationship to the annular mold surface and the second of the mold bodies includes an outermost annular mold surface which joins the mold surfaces of innermost and outermost radius, same which in turn and respectively an innermost annular mold surface and an outermost peripheral mold surface, located in a relationship substantially transverse to the outermost annular mold surface. 37. The molding machine according to claim 32, wherein the first of the mold bodies includes an annular mold surface that is joined to a radius mold surface that in turn attaches to a peripheral mold surface, located in a relationship substantially transverse to the annular mold surface, the second of the mold bodies includes an outermost annular mold surface which joins the mold surfaces of innermost and outermost radius, which in turn join and in a respective form an innermost annular mold surface and an outermost outer mold surface, located in a substantially transverse relationship to the P1209 / 00MX outermost annular mold surface and innermost and outermost annular mold surfaces are arranged in generally offset planes. 38. The molding machine according to claim 32, wherein the first of the mold bodies includes an annular mold surface which is joined to a radius mold surface which in turn attaches to a peripheral mold surface, located in a relationship substantially transverse to the annular mold surface, the second of the mold bodies includes an outermost annular mold surface which joins the mold surfaces of innermost and outermost radius, which in turn join and in a respective form an innermost annular mold surface and an outermost outer mold surface, arranged in a substantially transverse relationship to the outermost annular mold surface and the innermost and outermost annular mold surface are arranged in planes practically parallel and generally displaced. 39. The molding machine according to claim 32, wherein the first of the mold bodies includes an annular mold surface which is joined to a radius mold surface which in turn attaches to a peripheral mold surface, located in a relationship practically transversal to P1209 / 00MX the annular mold surface, the second of the mold bodies includes an outermost annular mold surface that joins the mold surfaces of innermost and outermost radius, which in turn are joined and shaped respective to an innermost annular mold surface and to an outermost outer mold surface, disposed in a substantially transverse relationship to the outermost annular mold surface and the aforementioned annular mold surfaces and the outermost ones are arranged in a parallel relationship generally separated from each other in the closed position of the mold. 40. The molding machine according to claim 32, wherein the first of the mold bodies includes an annular mold surface that is joined to a radius mold surface that in turn attaches to a peripheral mold surface, located in a relationship substantially transverse to the annular mold surface, the second of the mold bodies includes an outermost annular mold surface that joins the mold surfaces of innermost and outermost radius, which in turn join together and in a respective form an innermost annular mold surface and an outermost outer mold surface, located in a substantially transverse relationship to the outermost annular mold surface and P1209 / 00MX peripheral mold surfaces first mentioned and the outermost are arranged in a parallel relationship generally separated from each other in the closed position of the mold. 41. The molding machine according to claim 32, wherein the first of the mold bodies includes an annular mold surface that is joined to a radius mold surface that in turn attaches to a peripheral mold surface, located in a relationship substantially transverse to the annular mold surface, the second of the mold bodies includes an outermost annular mold surface that joins the mold surfaces of innermost and outermost radius, which in turn join together and in respective form to an innermost annular mold surface and to an outermost outer mold surface, located in a relationship substantially transverse to the outermost annular mold surface, the aforementioned and the outermost annular mold surfaces are arranged in a parallel relationship generally separated from each other in the closed position of the mold, and the peripheral mold surfaces first mentioned and The outermost ones are arranged in a parallel relationship generally separated from each other in the closed position of the mold. 42. The molding machine according to P1209 / 00MX claim 32, wherein the mold chamber includes an innermost annular mold chamber portion in which the peripheral edge portion of the glass part projects and an outermost outer mold chamber portion located in a The relationship substantially transverse to the innermost annular mold chamber portion and the innermost annular mold chamber portion is partially defined by the outermost peripheral mold surfaces of the fastening means. 43. The molding machine according to claim 34, wherein the mold bodies and the fastening means move relatively along a substantially normal travel path to a plane of the glass part. 44. The molding machine according to claim 36, wherein the mold bodies and the fastening means move relatively along a substantially normal travel path to a plane of the glass part. 45. The molding machine according to claim 37, wherein the mold bodies and the fastening means move relatively along a substantially normal travel path to a plane of the glass part. 46. The molding machine according to claim 38, wherein the mold bodies and the fastening means move relative to the P1209 / O0MX length of a trip path practically normal to a plane of the piece of glass. 47. The molding machine according to claim 39, wherein the mold bodies and the fastening means move relatively along a substantially normal travel path to a plane of the glass part. 48. The molding machine according to claim 40, wherein the mold bodies and the fastening means move relatively along a substantially normal travel path to a plane of the glass part. 49. A molded door comprising a single piece of hot-melt integral thermosetting polymeric material, forming a generally polygonal frame member, defined by a front wall of a substantially annular configuration, arranged substantially transversely to a peripheral wall which practically near or confining to the front wall, the polymeric thermosetting material is one of sheet molding compound (SMC) or bulk molding compound (BMC), a piece of tempered glass that practically closes an opening defined by the portion of innermost edge extruded with heat and pressure from the front wall, the glass piece has a peripheral edge and the peripheral edge of the glass piece is encapsulated by P1209 / 00MX the innermost edge portion, extruded with heat and pressure. 50. The molded door according to claim 49, wherein the frame member includes a plurality of integrally molded mamelons for receiving the fasteners. 51. The molded door according to claim 49, wherein the frame member includes a multitude of integrally molded reinforcing ribs. 52. The molded door according to claim 49, wherein the frame member includes a plurality of integrally molded mamelons for receiving the fasteners and the mamelons are located adjacent to the corners of the frame member. 53. The molded door according to claim 49, wherein the frame member includes a multitude of integrally molded reinforcing ribs and the reinforcing ribs are located adjacent to the corners of the box member. 54. The molded door according to claim 49, including a second generally polygonal frame member, having an opening substantially covered by a second piece of tempered glass and a means for securing the frame members to each other in a relationship P1209 / 0OMX generally peripherally aligned. 55. The molded door according to claim 49, including a second generally polygonal frame member, having an opening substantially covered by a second piece of tempered glass, the second frame member being constructed of metal and means for securing the members of each other in a generally peripherally aligned relationship. 56. The molded door according to claim 49, including a second generally polygonal frame member, having an aperture substantially covered by a second piece of tempered glass, a means for securing the frame members together in a generally peripheral relationship aligned and the peripheral wall is in an almost overlapping relation to the outside with a peripherally outermost edge portion of the second frame member. 57. The molded door according to claim 54, wherein the first-mentioned frame member includes a plurality of integrally molded mamelons that define in part the securing means. 58. The molded door according to claim 54, wherein the first-mentioned frame member includes a multitude of P1209 / 00MX integrally molded reinforcement ribs. 59. The molded door according to claim 54, wherein the first-mentioned frame member includes a plurality of integrally molded mamelons that define in part the securing means and the mamelons are located adjacent to the corners of the first-mentioned frame member. . 60. The molded door according to claim 54, wherein the first-mentioned frame member includes a plurality of integrally molded reinforcing ribs and the reinforcing ribs are located adjacent to the corners of the first-mentioned frame member. 61. A molded door comprising a single piece of hot-melt integral thermosetting polymeric material, forming a generally polygonal frame member, defined by a front wall of a substantially annular configuration, arranged substantially transversely to a peripheral wall which practically near or confining to the front wall, the polymeric thermosetting material is one of sheet molding compound (SMC) or bulk molding compound (BMC), a piece of tempered glass that practically closes an opening defined by the portion of innermost edge P1209 / 00MX extruded with heat and pressure from the front wall, the glass part has a peripheral edge, the peripheral edge of the glass piece is encapsulated by the innermost edge portion, extruded with heat and pressure and the front wall has an integrally molded handle located between the glass part and the peripheral wall. 62. The molded door according to claim 61, wherein the frame member includes a plurality of integrally molded mamelons to receive the fasteners. 63. The molded door according to claim 61, wherein the frame member includes a multitude of integrally molded reinforcing ribs. 64. The molded door according to claim 61, wherein the frame member includes a plurality of integrally molded mamelons for receiving the fasteners and the mamelons are located adjacent to the corners of the frame member. 65. The molded door according to claim 61, wherein the front wall and the piece of tempered glass are in an almost coplanar relationship, the peripheral wall defining a small acute angle with respect to a plane normal to the front wall and the peripheral wall converges in the direction towards the front wall. P1209 / 00MX 66. The molded door according to claim 65, wherein the frame member includes a plurality of integrally molded mamelons for receiving the fasteners. 67. The molded door according to claim 65, wherein the frame member includes a multitude of integrally molded reinforcing ribs. 68. A method for molding a peripherally encapsulated product, comprising the steps of: (a) providing a multi-part mold including at least two relatively movable mold bodies, which in the closed position thereof define a mold chamber annular substantially continuous and opening inward, having a portion of the chamber forming the handle and into the interior of the annular mold chamber opposing mold holding portions, (b) placing a piece of glass between the fastening portions of mold when the mold bodies are in the open position, (c) heating at least one of the mold bodies, (d) placing the polymeric thermoset material in the hot mold body in and around an area corresponding to the annular chamber and outward from a peripheral edge P1209 / 00MX practically continuous of the glass piece, (e) clamping the piece of glass between the clamping portions of the mold, (f) moving the mold bodies relatively gradually towards their closed position to thereby create forces of compression that extrudes the polymeric thermosetting material into the annular chamber and into the chamber portion, handle former, thereof and into the complete encapsulation of the continuous peripheral edge, including the opposite face surfaces and the peripheral edge surface between these, (g) cure the polymeric thermosetting material with heat and pressure while the mold is in its closed position to form a front annular wall having an integrally molded handle and a "window" defined by the piece of glass, (h) moving the mold bodies relative to their open position, and (i) removing the peripherally encapsulated product from the mold chamber. 69. The product encapsulation method according to claim 68, wherein the polymeric thermosetting material is a sheet molding compound (SMC - for its acronym in English). 70. The product encapsulation method, P1209 / 00MX according to claim 68, wherein the polymeric thermosetting material is a bulk molding compound (BMC - for its acronym in English). 71. The molding method according to claim 68, which includes the step of subsequently forming openings in the flange after the development of step (i). 72. The molding method according to claim 69, which includes the step of subsequently forming openings in the flange after the development of step (i). 73. The molding method according to claim 70, including the step of subsequently forming openings in the flange after the development of step (i). 74. A method for molding a peripherally encapsulated product, comprising the steps of: (a) providing a multi-part mold including at least two relatively movable mold bodies, which in the closed position thereof define a mold chamber ring virtually continuous and opening into and into the ring mold chamber opposing mold holding portions, (b) placing a piece of glass between the mold holding portions when the mold bodies are in the position open, P1209 / O0MX (c) heating at least one of the mold bodies, (d) placing the polymeric thermosetting material in the hot mold body in and around an area corresponding to the annular chamber and outward from a peripheral edge practically of the glass piece, (e) clamping the glass piece between the mold holding portions, (f) relatively gradually moving the mold bodies towards their closed position to thereby create compressive forces that extrude the polymeric thermosetting material to the annular chamber and to the complete encapsulation of the continuous peripheral edge, including the opposing face surfaces and the peripheral edge surface therebetween, (g) curing the polymeric thermosetting material with heat and pressure while the mold is in its closed position, (h) relatively moving the mold bodies towards their open position, (i) withdrawing from the chamber of the mold. mold to the peripherally encapsulated product, and (j) subsequently forming openings in the front wall after the development of step (i). 75. The product encapsulation method, according to claim 74, wherein the material P1209 / 00MX polymeric thermosetting is a sheet molding compound (SMC - for its acronym in English). 76. The product encapsulation method according to claim 74, wherein the polymeric thermosetting material is a bulk molding compound (BMC - for its acronym in English). 77. The molding method according to claim 74, including the step of subsequently forming openings in the flange after the development of step (i). 78. The molding method according to claim 74, which includes the step of subsequently forming openings in the flange after the development of step (i), and securing a handle using the openings subsequently formed. 79. The method of molding according to claim 75, which includes the step of subsequently forming openings in the flange after the development of step (i). 80. The method of molding according to claim 75, which includes the step of subsequently forming openings in the flange after the development of step (i), and securing a handle using the openings subsequently formed. 81. The method of molding according to claim 76, which includes the step of subsequently forming openings in the flange after the development of step (i). P1209 / 00MX 82. The method of molding according to claim 76, which includes the step of subsequently forming openings in the flange after the development of step (i), and securing a handle using the openings subsequently formed. P1209 / 00MX