MXPA00003710A - Method and apparatus for balancing the filling of injection molds - Google Patents

Abstract

A method of balancing the flow of a molten polymer containing material in a multi-runner injection mold includes the step of providing a mold body having at least one mold cavity and at least two runners. The first runner (74) includes first and second ends and is connected to a source of molten material. The first runner (74) is connected to a second runner (76). The second runner (76) is connected to the at least one mold cavity. A stream of a molten polymer containing material flows through the first and second runners. The stream is repositioned in a circumferential direction as it flows from the first runner (74) through the second runner (76) while maintaining continuity between laminates of the stream of the molten material in a radial direction. In this way a balance is provided for the melt temperatures and material properties of the cross branching runners. An apparatus for producing molded products having balanced thermal, material and flow properties includes a device for repositioning a stream of the molten polymer containing material as it flows from a first runner (74) into at least a second downstream runner (76). If desired, the stream of the molten thermoplastic material can be repositioned by approximately 90 degrees.

Description

METHOD AND APPARATUS FOR CONTROLLING THE FLOW ORIENTATION IN A DRAINING CHANNEL FOR MOLD CONTROLLED FILLING BACKGROUND OF THE INVENTION This application bases its priority on provisional application serial number 60 / 061,888 filed on October 14, 1997, based on in the provisional application serial number 60 / 081,840 filed on April 15, 1998 and in the provisional application serial number 60 / 100,516 filed on September 16, 1998. This invention relates to a method and apparatus for the flow of a stream of laminar flow material in a mold having at least one branch of the pour channel, branching into at least two directions. More specifically, the present invention relates to a method and apparatus for repositioning the non-symmetrical conditions of the flow material to a desired position in a circumferential direction while maintaining continuity between the laminates from the center to the perimeter of the pouring channel. . A conventional mold assembly for injection molding or transfer of materials containing laminar flow polymers is constructed of high strength metals, usually tool-type steels having a high compressive strength. A molded part is formed inside the mold cavity. The mold cavity is opened and closed during each molding cycle along a dividing line in order to remove or eject the molded part. The material that produces the molded part is fed from a source of material into the cavity through a system of emptying channels. Frequently, several spaced mold cavities are defined in the mold. These cavities are each connected to a source of material through a drain channel. The emptying channels may include branches. A branching may occur at the end of the first emptying channel section and may intersect at some angle with respect to the first emptying channel section. The second section of the angular branch emptying channel can extend in one or more directions from its intersection with the first section of the emptying channel. Non-symmetrical conditions develop in a void channel, flowing a stream of laminar flow material, when a branch of the void channel branches in at least two directions from the intersection with the first section of void channel. The branch can proceed at the end of any number of sections of the emptying channel that branches progressively. In multiple cavity milling, it is important that the material is supplied to each cavity of the mold at the same time and with the same pressure and temperature. Any variation of these conditions will result in variations in the parts produced within these cavities. Such variations may include the size, shape or weight of the product as well as the mechanical properties and cosmetic appearance of the product. To help ensure balanced conditions the length and diameter of the emptying channel that feeds each cavity into a multiple cavity mold are preferably the same. This usually results in the emptying channels being placed in any of the following: a radial pattern, a branching pattern in the form of "HA" or some combination of radial pattern and branching pattern in the form of "H." With the radial pattern , the fusion moves radially outwards from the source of material directly feeding a single cavity, Variations of this can be branched at the end of each section of emptying channel and feed two or more cavities. HA the emptying channel is divided continuously in two directions at the end of a given section. In some cases, a radial pattern may be placed at the end of a drain channel with a branching pattern of type "H". When molding parts using multiple cavity molds it is important that each cavity in the multiple cavity mold produces substantially identical parts. This results in maximum productivity and consistent quality of the parts. In order to supply a mold of this type, the dimensions of the cavity must be almost identical for each of the various cavities and the cooling and the material supply in flow must be substantially equal. It is therefore a normal practice in the design of multi-cavity molds to "naturally balance" the casting channel system in order to help provide the required mold filling consistency. In naturally balanced emptying channels, the same cross-sectional shape and the same emptying channel length feed each cavity. The same concept of a system of balanced emptying channels either naturally or geometrically can also be applied to branches of multiple emptying channels which may be feeding a single part at multiple locations. Most injection or multi-cavity transfer molds are designed with a system of naturally balanced or geometrically balanced casting channels in order to minimize variations in the material flowing into the cavities during production. Despite the geometric balance, it has been frequently observed that the filling of molds using these designs of naturally balanced emptying channels results in imbalances. In most cases, these imbalances have not been recognized until they are more than 4 cavities in the mold. However, the imbalance depends in fact on the number of branches in the emptying channel and can affect up to a molded part in a single cavity of multiple gates, depending on the design of the emptying channel system. It has been found that the parts formed in some of the cavities, usually those found in the internal branches closest to the source of material, are usually larger and heavier than the parts formed in the other cavities. These flow imbalances have historically been attributed to variations in mold temperature and / or mold deviation. The Applicant has identified that there is an imbalance of flow-induced cavity replenishment found in many of the most commonly used and accepted designs of "naturally balanced" casting channels such as the "H" shaped casting channels geometrically balanced and in the form of modified "H", especially those with eight or more cavities. The flow imbalance can be created by a nonsymmetric shear stress distribution within the laminar flow material as it travels through the emptying channel system. A flow imbalance can also be created in a drainage channel when the laminar flow material has a non-symmetrical temperature distribution created either by localized shear stress or temperature differences between the material flowing and the wall of the drainage channel . Both non-symmetrical conditions can result in variations in the viscosity of the flowing material and, in some cases, in its structure. In most cases, during the conventional molding of thermoplastic and thermal hardening materials, the result is a material of lower viscosity, hotter, of high shear deformation around the inner periphery of the emptying channel surrounding a material of Higher, colder viscosity, of relatively lower shear deformation in the middle part of the pouring channel. Since the flow is laminar, when a branching occurs in the emptying channel, the hotter material of high shear deformation along the perimeter remains in its external relative position while the internal material is divided and is now placed in the opposite side of the flow channel in relation to the hotter material of high deformation by shear stress. This side-to-side variation creates a variation between branch-emptying channels from side to sideor a mold cavity, where the hotter material with high shear deformation will flow to one side and the colder material of low shear deformation will flow to the other side. The article by Beaumont and Young in the Journal of Injection Molding Technology, September 1997, volume 1, number 3, entitled "Mold Filling Imbalances in Geometrically Balanced Runner Systems" (Mold Filling Imbalances in Geometrically Balanced Drain Channel Systems) "pages 133-143) draws attention to this problem.This article is hereby incorporated by reference in its entirety.The problem has become more evident in recent years as the tolerances of the molded plastic parts have been more demanding and as has increased attention in terms of quality.The trend towards the use of smaller diameters, which was thought to improve the molding process, has increased the problem.

The article by Beaumont, Young and Jarowski entitled "Solving Mold Filling Imbalances in Multi-Cavity Injection Molds " (Unbalance Resolution of Mold Filling in Molds of Multiple Cavity Injection), published in the Journal of Injection Moldinf Technology, June 1998, Volume 2, Number 2, pages 47-58 also focuses on this problem. This article is also incorporated herein by reference in its entirety. The imbalance found in a multiple cavity mold can be significant, resulting in more-volume variations, flow velocity between cavities up to 19 - 1 in extreme cases. The magnitude of the imbalance depends on the material as well as the sensitivity of the imbalance of the process. A variety of different types of thermoplastic substances, including amorphous and semi-crystalline manipulated resins, have presented significant mold fill imbalance in molds with branching channels. While most of the present description refers to thermoplastic materials, it must be recognized that unbalanced conditions can occur in any mold with a pour channel with branches, branches in at least two directions, where several types of fluids can flow . These imbalances occur for any fluid that shows a) a laminar flow and b) a viscosity affected by the shear deformation velocity (as in the case of a non-Newtonian fluid) and / or temperature c) characteristics where the variations In the deformation by shear stress, or the flow velocity through a flow channel create variations in the characteristics of the materials. Both characteristics are typical of thermoplastic materials, thermal hardening and many of the powder ceramic and powdered metal molding materials used today. A polymer vehicle is often used with powdered metals and powdered ceramics. It is the polymer that provides such powdered metal or powdered ceramic materials with the same characteristics as plastic materials show in terms of viscosity and laminar flow effects. Traditional methods for balancing the flow in multi-cavity molds by receiving branches or gates of high-flow casting channels can not provide both a pressure equilibrium and a thermal equilibrium in the material in flow. Even if a pressure equilibrium can be achieved, a variation of melting temperature between the various cavities remains. In addition, the balance achieved in this way is very sensitive to changes in material and process. The ability of this invention to control the position of asymmetric material conditions can not only be used to balance the flow in branches of emptying channels but can also be used to control the asymmetric conditions of material flowing in a part forming a cavity printed. Many of the properties of the molded part can be influenced by the conditions of the fusion from which it is formed. Some of these properties include how the molded part shrinks or twists, its mechanical properties and its appearance. With an understanding that a part can be twisted as a result of temperature variations, the asymmetric temperature in the material in laminar flow that enters the cavity, through a drain channel and gate, could be placed to control this camber. With thermoplastic materials that are commonly twisted to a hot side of a mold, the asymmetric laminar flow material could be placed in such a way that the hottest melt penetrating the cavity lies along the coldest half of the mold. This could potentially compensate for mold temperature variations. A similar principle could be applied to compensate effects of part geometry on the camber or another need to control the distribution of other properties of material that may be affected by variations in shear and temperature. Flow deviators were used to change the flow patterns in a laminar flow material. A device of this known type is presented in the North American patent number 5, 683,731 by Deardurff et al. This device contains a central flow channel and several deviators. The device is placed in a current in fusion. Fusion from some part of the internal laminates of the melt stream is fed into a central flow channel and fusion of some of the external laminates of the melt stream is fed to several diverters adjacent to the central flow channel. The fusions of the two flow paths are then recombined in such a way that the material of each of these flow regions has likewise been distributed among the various flow channels. However, in Dearduff et al., The internal and external laminations of the flow channel are separated and recombined. This results in a more complicated and more expensive device than is necessary. In addition, the Dearduff device would not be practical in a casting channel system that solidifies and is ejected from the molding process during each cycle as the device is molded in the casting channel and ejected from the mold. Accordingly, the Dearduff device is limited to a hot pouring channel or a non-solidification pouring channel, applications in which the plastic in the pouring channel does not solidify and is not ejected from the mold. In addition, the Dearduff device is relatively complex and requires considerations of the relative sizes and shapes of the central flow channel and the diverter. The sizes and shapes of these channels will dictate a) the number of external laminates to reposition in relation to the central flow channel b) where they will be placed and c) their distribution in relation to each other. Likewise, any change in material or process may alter the distribution of the fusion between the central and deviation channels. In addition, the Dearduff device achieves its objective through the selective deviation of a part of the external sheets and their distribution among several channels. The disadvantage of this design is that it can only selectively reorder the fusion through the flow channel in two different internal and external regions. This limits the contribution of this device since the variation in a melting channel is continuous and complicated by the fact that the change of material conditions in the flow channel are not normally linear. The achievement of a continuous redistribution of the fusion is not possible with a device that selectively stops the laminates in two different regions, namely the internal and external regions. Other known deviators have disadvantages as well. None of these devices can reposition the sheets in a melt in a circumferential direction while maintaining continuity between the laminates in a radial direction, in addition, the division of the flow channel into several flow channels, ie, the central channel and the various deflection channels in the known devices create a potentially significant pressure loss - since the pressure drop depends approximately on the radius of a round flow channel at its fourth power - due to the smaller resulting channels. The alternative is the significant increase of the cross section of all the flow channels in order to mitigate the pressure loss that results from the smaller flow channels, which significantly complicates the construction of such a mold. Accordingly, it has been found desirable to develop a novel and improved process and apparatus for controlling flow in void channels that could overcome existing and other limitations while providing better overall results and more advantages. BRIEF COMPENDI OF THE INVENTION In accordance with the present invention, a new method and a new mold structure are provided for controlling mold filling. The mold filling is controlled in a mold having at least one emptying channel branching in two directions by controlling the position of non-symmetrical conditions of concentric laminations occurring through the flow path of a stream of material laminated flow. More particularly, in accordance with the method and with the mold structure of this invention, there is provided a mold body having at least one mold cavity and a pour channel having at least one branch with branches in two directions. The emptying channel includes at least a first emptying channel section intersecting a second emptying channel section. In some applications of this invention another part of the emptying channel branches in two directions and the second emptying channel section branches in one direction, while in other applications it is the second emptying channel branching in two directions. During a molding cycle, a stream of laminar flow material flows into the emptying channel. The laminar flow material does not have symmetrical conditions occurring in one direction through its downstream path of a branch in the emptying channel where the first emptying channel section intersects the second emptying channel section. In accordance with this invention, these non-symmetrical conditions are repositioned to a desired position in a circumferential direction around the center of the emptying channel path, while a continuity is maintained between the laminates from approximately center to the perimeter of the emptying channel. More particularly in accordance with one aspect of the present invention, the non-symmetrical conditions of the laminar flow material are repositioned by an offset repositioning of laminates located in at least a portion of the emptying channel. The laminate repositioner has a structure that determines both the quantity and the direction of the circumferential repositioning of the non-symmetrical conditions that occur. According to another aspect of this invention, the first emptying channel section intersects the second emptying channel section at an angle, and the rolling repositioner includes the intersection between these emptying channel sections. The second empty channel section may branch at this intersection in one direction or may branch in two directions through extensions in a first direction and in a second direction from the intersection through the first empty channel section. The first emptying channel section can intersect the second emptying channel section at a 90 ° angle or at any other angle that causes the desired repositioning of the non-symmetrical conditions. When the branch extensions of the second empty channel section are not in a straight line between them, the first empty channel section intersects each of them at an angle other than 30 °. This angle is also chosen to affect the amount of repositioning of the non-symmetrical conditions of the laminar flow material. In many applications of this invention, the emptying channel includes a third emptying channel section intersected by one end of the second emptying channel section located in the first direction. The emptying channel also includes a fourth emptying channel section intersected by one end of the second emptying channel located in the second direction. The laminate repositioner repositions the non-symmetrical conditions of the laminar flow material to an apposition, in a circumferential direction around the center of the path of the second emptying channel, which is substantially symmetrical from side to side with respect to the third channel section of emptying and the fourth section of emptying channel. As a result, the normal imbalance of the flow through the third empty channel section and the fourth empty channel section improves significantly. In other applications of this invention, the repositioning of non-symmetrical conditions is up to a position, in a circumferential direction around the center of the path of the second section of the emptying channel, which causes the non-symmetrical conditions to be distributed in a desired manner within the mold cavity. In the case of some applications of this invention it is advantageous to reposition the non-symmetrical conditions of the laminar flow material by approximately 90 °. In the case of other applications of this invention it is advantageous to reposition the non-symmetrical conditions at another angle to obtain the desired filling of one or more mold cavities. In one embodiment of this invention, the laminate repositioner employs at least one casting channel length having a spiral type circumference with a non-circular transverse shape, progressively repositioned along the length of the casting channel to reposition the conditions non-symmetrical of the laminar flow material. In another embodiment of this invention, the laminate repositioner includes, in the emptying channel, a dividing member having a spiral shape that divides the cross section of the emptying channel substantially halfway along a radial direction. In both modalities, the amount of repositioning of the non-symmetric conditions is at an angle less than 180 °. This invention can be used with many types of molds. Certain embodiments of this invention are especially useful with molds of a type in which the laminar flow material solidifies in the mold casting channel during each molding cycle and is then removed from the pouring channel prior to the completion of the cycle. molding One embodiment of this type of this invention can be applied to a mold of this type having a pair of mold plates and a dividing line between these plates that opens and closes during a normal molding cycle. The laminate repositioner includes a first emptying channel section of the emptying channel and a second emptying channel section of the emptying channel which are located along the dividing line, with the first emptying channel section intersecting the second section of emptying channel at an angle. The intersection occurs in an area at the periphery of the second emptying channel section in which the axis of the second emptying channel section and the axis of the first emptying channel section intersecting are at different elevations therebetween . In the intersection area the laminar flow material flows in one direction between the different elevations of these shafts which is not the same direction as the flow in any of the first empty channel section or the second empty channel section. In this embodiment of this invention, the amount of elevation change between the first empty channel section and the second empty channel section can be selected to affect the amount of non-symmetric repositioning that occurs. Alternatively, the angle of the flow direction of the laminar flow material between the axes of the first empty channel section and second empty channel section may be selected to affect the amount of repositioning of the non-symmetrical conditions. Another alternative is to choose the intersection angle of the first empty channel section with the second empty channel section to affect the amount of repositioning of the non-symmetrical conditions. The structure of this laminate repositor can have various shapes, some of which are illustrated and described below.

The essence of this invention is not found in any of the characteristics of the method and mold structure presented above that are discussed more fully in the Description of the Preferred Modality and which are claimed below. On the contrary, this invention is distinguished from the prior art by its combination of structural features that constitute a single method and a single mold structure. Important features of this invention are illustrated and described below to show the preferred embodiment contemplated to date to carry out the invention. Those skilled in the art will note that this invention may present modalities that are different from the modalities chosen and that the details of the method and the mold structure may change in various ways without departing from the scope of this invention. Accordingly, the drawings and description should be considered as illustrative and not limiting of the scope of the invention. Further. The claims should be considered as including equivalent methods and equivalent mold structures as parts of the nature and scope of this invention. BRIEF DESCRIPTION OF THE DRAWINGS The invention may take physical form in certain parts and arrangement of parts, preferred embodiments of the present invention will be described in detail in this specification and will be illustrated in the accompanying drawings that form a part thereof and where: FIG. 1 is a schematic view of a type of multiple cavity injection mold arrangement including an "H" pattern of emptying channels with branches; Figure 2 is a schematic view of another type of a multiple cavity injection mold arrangement including an "H" pattern of emptying channels with branches; Figure 3 is a cross-sectional side elevation view of adjacent portions of two emptying channel sections that are at an angle therebetween along a dividing line showing a means for repositioning a flow of flow material laminar according to a first preferred embodiment of the present invention; Figure 4 is a cross-sectional side elevational view of adjacent portions of two emptying channel sections that are at an angle therebetween along a mold dividing line in accordance with a second preferred embodiment of the present invention; Figure 5 is a cross-sectional side elevational view of adjacent portions of two emptying channel sections that are at an angle therebetween along a mold dividing line in accordance with a third preferred embodiment of the present invention. invention; Figure 6 is a cross-sectional side elevational view of adjacent portions of two emptying channel sections that are at an angle therebetween along a mold dividing line in accordance with a fourth preferred embodiment of the present invention. invention; Figure 7 is a cross-sectional side elevational view of adjacent portions of two emptying channel sections that are at an angle therebetween along a mold dividing line in accordance with a fifth preferred embodiment of the present invention; Figure 8 is a cross-sectional side elevation view of two emptying channel sections that are at an angle therebetween along a mold dividing line in accordance with a sixth preferred embodiment of the present invention; Figure 9 is a cross-sectional side elevational view of adjacent portions of two emptying channel sections that are at an angle therebetween along a mold dividing line in accordance with a seventh preferred embodiment of the present invention; Figure 10 is a top plan view of a branching channel system employing an angle other than 90 ° between a first emptying channel section and a second branching emptying channel section to the left and to the left. right; Figure 11 is a perspective view of a cavity mite intersecting a cast channel channel insert of a mold in accordance with another preferred embodiment of the present invention; Figure 12 is a perspective view of a cavity half intersecting a casting channel insert of a mold cooperating with the cavity half shown in Figure 11; Figure 13 is a top plan view of a pair of adjacent void channels and a body positioned at the angle change of the intersecting void channels according to another preferred embodiment of the present invention; Figure 14 is a cross-sectional side elevational view of the embodiment of Figure 13; Figure 15 is a perspective view of a spiral discharge channel dividing member according to another preferred embodiment of the present invention; Figure 16 is a front elevational view of the spiral discharge channel dividing member of Figure 15 positioned in a non-solidification dump channel; Figure 17 is a perspective view of a portion of a spiral circumferential laminar flow rotation device according to another embodiment of the present invention; Figure 18 is a top plan view of the emptying channel section of Figure 17 illustrated as a flow channel; Figure 19 is a front elevation view of the emptying channel section of Figure 17 illustrated as a flow channel; Figure 20 is a schematic view of a multi-gate mold type, single cavity illustrating expected variations in terms of melting conditions when the present invention is not employed, wherein a means for repositioning the laminar flow material can be employed. non-symmetrical in accordance with the present invention; Figure 21 is a schematic view of a two-cavity mold with non-symmetrical cavities, illustrating the expected variations in terms of melting conditions when the present invention is not employed, wherein a device for repositioning the material can be employed. non-symmetrical laminar flow in accordance with the present invention; and Fig. 22 is a schematic top plan view of a pair of spiral partition members of Fig. 15 positioned in a second drain channel section in accordance with another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES While this invention relates generally to a device for improving the balance between the branches of the emptying channel in a multi-cavity mold by rearregating the non-symmetrical conditions of a laminar flow material in the channel By casting a mold to provide symmetry to a downstream branch, the device for rearming a melt can also be used to control the non-symmetrical conditions that penetrate a mold cavity through a drain channel with branches and to control in this way the final characteristics of the molded parts. The emptying channels can be either hot emptying channels or cold emptying channels. During molding, where cavities in a mold are fed by a geometrically balanced H-type branching channel in a conventional manner or modified H type, a laminar flow material separation of high deformation and low stress strain occurs cutting. This was described above. However, said variation can be carried out in emptying channels that have patterns other than the H pattern, such as for example a radial pattern or combinations of radial and H patterns.

It is not always the case that the hotter material with high shear deformation, which is normally found near the external laminations of the flow channel, ends up in cavities that are fed by the emptying channels of extreme branches that are closest to the point of injection. The final destination point in relation to the injection point depends on the disposal of the emptying channel. Figure 1 illustrates a pour channel arrangement wherein a hot laminar flow material normally of high shear stress terminates in the outer cavities and the colder material normally of low shear stress terminates in the internal cavities. More specifically, in Figure 1, the laminar flow material is initially moved in a mold 10 along a first section of emptying channel 12. At the end of the first section of emptying channel, the material rotates at 90 ° and it divides in opposite directions as it flows in a second emptying channel section 14. at the first end of the second emptying channel section 14, the laminar flow material flows in a first tertiary emptying channel 16 which feeds a first mold cavity 18 and a second mold cavity 20. At the second end of the second emptying channel section, the laminar flow material flows into a second tertiary emptying channel 22 which feeds a third cavity 24 and a fourth cavity 26 The arrangement illustrated in Fig. 1 is such that the hotter laminar material of high shear strain will likely end up in cavities 18 and 26 that are farther from the point of contact. injection than the cavities 20 and 24 since it is the path of high shear deformation material developed around the perimeter of the first section of the drain channel 12. Another type of conventional pour channel arrangement is illustrated in Figure 2. This emptying channel arrangement 30 includes a first emptying channel section 32 which feeds a second emptying channel section 34. One end of the second emptying channel section feeds a first tertiary emptying channel 36 which in turn feeds a pair of fourth order casting channels 38 and 40. The first fourth order casting channel 38 feeds a first mold cavity 42 and a second mold cavity 44. The second fourth order casting channel 40 feeds a third mold cavity. mold 46 and a fourth mold cavity 48. At the other end of the second pouring section 34, it feeds a second tertiary pouring channel 50 which in turn feeds another p of fourth order pouring channels 52 and 54. A third pouring channel 52 of fourth order feeds a fifth mold cavity 56 and a sixth mold cavity 58. A fourth order pouring channel 54 feeds a seventh mold cavity 60 and an eighth mold cavity 62. In each of these cases, the designer tries to maintain the lengths and diameters of the emptying channels by feeding each cavity essentially the same. The diameters of the emptying channels can change along their lengths but the change must be consistent in each of the branches that feed the cavities. This construction provides a geometrical balance to the emptying channel system. During laminar flow, the laminar flow material flowing near the stationary void channel walls experiences increased shear strain as compared to the portion of the laminar flow material traveling in the central part of the channel flow. of emptying. During the thermoplastic injection molding process, frictional heating occurs just inside the thin frozen layer formed as the plastic touches the cold surfaces of the pour channel. In a thermal hardening material, not only friction heating occurs but the mold is generally hotter than the material introduced into the mold. This tends to increase the thermal variation that is created within these high friction external laminates and the more internal laminates of the laminar flow material.

The result of this frictional heating is a relatively high temperature layer that is created near the outer perimeter of the emptying channel. When the fusion reaches the end of a branch channel emptying, it is divided into two directions. Due to the nature of the laminar flow, the hotter material of high shear deformation that travels along the outer laminates will maintain its position in an important measure along the outer region of the flow channel. This will result in the hotter high-shear deformation material coming from the first emptying channel section flowing along the inner edge of a second emptying channel section branching in two directions. With the ramification of the second section of the drain channel going to the right, the hotter outer laminate of high shear deformation on the right side of the first drain channel friction will flow along the side wall right of the new branch. The lower cold shear deformation center laminate will go to the opposite left side of the new emptying channel branch that goes to the right. The opposite will occur in the left branch of this second emptying channel section where the hotter high-shear deformation external laminate on the left side of the first emptying channel section will flow along the wall on the left side of the new branch. The cooler center laminate with low shear deformation will flow to the opposite right edge of the new emptying channel that goes to the left. The result will be that one half of the two second sections of branch emptying channel will be hotter than the other half. If at the end of this section of branching channel to the left and right the melt enters a cavity, the high shear deformation material will continue in the cavity and will advance along one side and the material under Cut will advance in the cavity along the other side. This variation from side to side in terms of material conditions can result in undesirable characteristics in the molded part. At the end of this second section of branch emptying channel to the left and right, if the emptying channel is divided again, that is, as in Figure 1 and 2, the hottest material, with greater deformation by stress Cutting follows the branching on its side and the colder material with less deformation due to shear stress follows the branch on its side. The result is that the material traveling through each of these emptying channel branches will have a different temperature and a different shear deformation history. This material can then penetrate directly into one or several cavities or it can continue to be divided as in figure 2. Each time the flow is divided into a new branching channel emptying, the hottest material with greater deformation by shear follow the inner edge of the new empty channel branch. The result is that the laminar flow material that approaches and penetrates the more central cavities, fed from the hotter outer laminates with higher shear deformation of the first section of casting channel of a mold with this type of The casting channel system has a hotter melting temperature than the temperature of the material penetrating into the outermost casting cavities fed from the colder internal laminates with less deformation by constant stress of the first casting channel system. Referring now to Figure 2, most of the cavities that receive the cooler temperature material with a relatively lower shear deformation would be the mold cavities 42, 44, 46, 56, 58, and 60. The cavities that would receive the hottest material with a relatively higher shear stress would be the mold cavities 48 and 62. These mold cavities lie in the path of fusion with high shear deformation developed in the first pour channel section 32. Such variations in temperature will result in variations in the final molded product which may include variations in size, weight and mechanical properties. Since the variation in the conditions of the material can be almost continuous in 1 path of the channels of emptying, it can be expected that each time a channel of emptying branches, the conditions of the fusion that feeds each one of the branches will be different . Accordingly, it can be expected that there is also a variation between the cavities 42, 44, and 46 and between the cavities 56, 58 and 60. The mold will have four different sets of molded parts. The four assemblies molded with a similar material will be 48 and 52, 46 and 60, 44 and 58, 42 and 56. Under the conditions described above, it is considered that frictional heating dominates any melting cooling caused by the walls of the mold. With materials similar to the most moldable plastic materials, the resulting variation in temperature is increased by the decrease in the shear stress that occurs in these high friction external regions due to the non-Newtonian characteristics of the plastic materials. Such non-Newtonian characteristics will also affect the viscosity of the melt in the channel. In some cases in which frictional heating is not the dominant parameter as can occur in the case of large diameters of emptying channels and slow flow velocities, the opposite condition can occur in which the external laminates are cooler than the external laminates. internal laminates. In any of the cases there is the probability of a variation in terms of melting temperatures, viscosity and / or flow conditions in the emptying channel. All these variations will continue in a part that forms a mold cavity or in branches of the drain channel downstream according to what is described above that will eventually be fed into a part forming a mold cavity. In order to provide a consistent fusion to each of the cavities fed by branching channels as illustrated in Figures 1 and 2, the laminar flow material can be repositioned in a circumferential direction, while continuity is maintained between the laminates in a radial direction. The rotation of all the laminates, without separation, offers the best guarantee that continuous variations that exist through the cross section of the emptying channels will all be affected by the circumferential repositioning. The present invention offers the repositioning of all fluid laminates in a void channel in a circumferential direction that is perpendicular to the flow direction. Said repositioning is relative from the approximate center to the perimeter of the melt flow stream of laminar flow material without requiring physical separation or repositioning of the relative positions of the laminates - that is, the laminates originating from the central region are not they move towards the external region of the cross section of the flow channel and vice versa, nor limited selected regions of external or internal laminations require a specific repositioning through specially balanced channels. On the contrary, the present invention strategically repositions the locations of all the laminates in the flow channel such that when they are divided into the downstream branch in the emptying channel, the melting conditions between the two branches are more balanced. When repositioned in this way, the thermal and viscosity variation will not be from the left side to the right side of a drainage channel, but from the top to the bottom of the drainage channel. When the melt repositioned in a drain channel now feeds a further branch to the left and to the right, each branch section of the empty channel to the right and to the left will receive melting variations of the upper part to the bottom almost equal. The amount of repositioning can vary according to the required positioning of the flow laminates to achieve the objective of balancing the melting conditions in a channel system of emptying with branches or to strategically place the fusion laminates within a part forming a part. mold cavity. Various embodiments of a means of repositioning the flow of a laminar flow material according to the present invention will be presented below. When a laminar flow material flowing through a void channel changes direction, the material will remain substantially in its relative position through its flow path, i.e., the circumferential positioning of the melt laminates will remain substantially the same. relation to a plane common to both empty channel sections. Changes in the relative circumferential position of the flow laminates between a first section of emptying channel and a second section of emptying channel are achieved through various embodiments of the present invention causing the material to flow through composite directional changes that they combine three flow directions where no more than two of the three flow directions can be described in a common plane, ie the angle between a first flow direction and a second flow direction will be in a different plane than the angle between the second flow direction and the third flow direction. In this way, when the circumferential positioning remains the same in a given direction change, the composite angles along different plans cause the material in flow that penetrates the first change of direction to become repositioned circumferentially in relation to the material that leaves the second change of direction. Referring now to Figure 3, there is illustrated a mold employed with a solidification casting channel that includes a first mold half 70 and a second mold half 72. A first casting channel section 74 is defined in the first half printed. A second draining section 76 is defined in the second mold half, and this second drainage channel section is intersected at its periphery by one end of a first drainage channel section 74 which is at a different elevation and which is extends at an angle that is approximately perpendicular. In this embodiment, the laminar flow material travels along the first section of emptying channel 74. At the point where the first emptying section would normally branch, within the same half of mold 70 in a second section of emptying channel, the first emptying channel ends. At least a part of the branch or second section of the emptying channel is defined at a different elevation in the second mold half 72 at its intersection with the first emptying channel section and may either fully or partially connect the end of the first emptying channel. The melt is repositioned in the emptying channel by diverting the melt flow in a direction approximately normal to the longitudinal axes of the primary and secondary emptying channels. At the end of the first empty channel section channel 74, the melt is biased upwards, in a direction approximately normal or perpendicular to the dividing line of the molds. After moving over a short distance in this perpendicular direction, the melt enters the secondary emptying channel 76. the second emptying channel section 76 extends in a direction approximately perpendicular to the first emptying channel section. The geometry of the flow of Figure 3 will result in the hottest outer laminate standing adjacent to the bottom of the secondary void channel 76 and the colder internal laminate being located adjacent to the top of the secondary void channel. After being fused approximately normally or perpendicularly to the plane of the mold dividing line before entering the intersecting branch emptying channel, the fusion effectively rolls to enter the secondary emptying channel approximately 90 ° with relation to its previous position in the primary emptying channel. Another way of describing Fig. 3 is that opposite that the end of the first emptying channel section ends at a different elevation of the intersecting portion of the second emptying channel section, the laminar flow material is forced to flow in a direction between the elevation differences of the flow axes of the first empty channel section 74 and the second empty channel section 76 at the intersection of the second empty channel section 76. the second channel section of The emptying, which is at an angle to the first section of the emptying channel, extends along the dividing line of the mold and may extend in one or two directions from the intersection. The elevation differences of the intersecting two channel sections cause the laminar flow material to flow along the elevation change direction between 74 and 76 which is an address that is not common to any of the sections of intersecting channel 74 or 76 of intersection and creating a third direction of flow and a second change of direction, the resulting composite address changes combine three directions of flow wherein no more than two of the three directions of flow can be described in a common plane. Since the material flowing in the direction of 1 elevation change between 74 and 76 changes angle at the beginning of the second section of drain channel 76, the material with high shear deformation which should have been displaced along the sides of the emptying channel section 74 will be placed substantially along the bottom of the emptying channel section 76 with ramifications if it advances in two directions, or the upper and lower part of the emptying channel section 76 branch if it moves in one direction. A material flowing along the top and bottom of the drain channel section 74 will be positioned substantially along the sides of the drain channel section 76 regardless of the chest having branches in one or two directions. The effect is that the material advancing through the emptying channel section 76 from the intersection will be repositioned circumferentially relative to its original position in the first emptying channel section 74. A flow direction between the flow axes of the emptying channel sections 74 and 76 which causes the melting to move at approximately 90 ° relative to the flow directions of 74 and 76, which are also 90 ° to each other, will result in a repositioning of approximately 90 ° in the circumferential direction of the laminar flow material in the second emptying channel section 76 relative to its previous position in the first emptying channel section 74. However, in some cases, it may be desirable to reposition the melt in one direction circumferential by another amount. This includes cases in which a mold emptying channel may include more than two branches or cases in which a mold sprue can be employed which feeds a primary emptying channel in a mold. This can be achieved in several ways. With reference now to figure 4, at the end of a first empty channel section 80 in a first mold half 82, the intersection of the channels could be constructed with another angle than the angle perpendicular to the plane of the mold dividing line causing the flow of Fusion through this joint flows at a certain angle other than about 90 ° relative to the flow directions of the first section of the drain channel. For this purpose, Figure 4 shows an end wall 84 having an acute angle instead of a substantially perpendicular wall terminating the channel. At least a part of the second emptying channel section 86 is positioned in a second mold half 88 where its flow axis is at a different elevation than the first emptying channel section 80 and where it is intersected at its periphery by said first emptying channel section 80 and in at least a portion of the end wall 84. Alternatively, and with reference now to FIG. 5, a first emptying channel section 90 positioned in a first mold half 92 is illustrated. and at least a portion of a second flush channel section 94 is illustrated located in a second mold half 96 at a different elevation than the first flush channel section and intersected at its periphery by the first flush channel section. Figure 5 shows a mode in which at least a portion of the second emptying channel section partially connects the first emptying channel section. This partial splice will cause the flowable material to flow in one direction other than 90 ° when flowing between the different elevations of the first emptying channel section and the second emptying channel section. Referring now to Figure 6, there is illustrated a first emptying channel section 100 which is in the same mold half as at least a portion of the second emptying channel section 104. in order to create the direction of additional flow required at the angular intersection between the first emptying channel section and the second emptying channel section, a flow diverter 106, in combination with an extension 102 of the first emptying channel section of the emptying channel section. emptying 100 causes the flowable material in the emptying channel section 100 to be positioned at a different elevation before where the second emptying channel section 104 intersects at its periphery. In this way, the creation of the same additional flow direction described in FIG. 3 is provided at the intersection of the first empty channel section and second empty channel section which are angularly positioned therebetween. It is apparent from FIG. 6 that, as in the case of FIG. 3, a repositioning of approximately 30 ° is achieved in the circumferential direction of the laminar flow material since the flow deviator 106 causes the fusion to be positioned in the extension 102 of the first emptying channel section, which is located completely above the height or cross section of the second emptying channel section 104. The melting of this form is displaced approximately 90 ° relative to the flow direction both of the extension 102 of the first emptying channel section as of the second emptying channel sections 104 while the two resulting changes of direction can not be described in the same plane. The result is that the laminar flow material in the second emptying channel section will be repositioned in a circumferential direction by approximately 90 ° relative to its original position in the first section extension of emptying channel. Insofar as the first section extension of the emptying channel and the first emptying channel section are defined along the same dividing line and flowing in the same axial direction, the rolling positions in the circumferential direction for both will remain the same as they change elevation. The sole purpose of the extension of the first emptying channel section is to raise the axis of the first emptying channel section to a different elevation of the second intersecting emptying channel section. Therefore, it is considered to be a part of the first empty channel section. Referring now to Figure 7, a modality is presented in which there is a repositioning less than 90 ° of the melt in a circumferential direction. In this embodiment, a first emptying channel section 110 communicates with a first section extension of emptying channel 112 which in turn communicates with a second emptying channel section 114 which is at a different elevation of the elevation of the emptying channel. extension 112 of the first emptying channel. However, in this embodiment, a diverter 116 that is defined in the material of the mold half between the first empty channel section 110 and the second empty channel section 114 does not cause the material in the first channel extension. of emptying 112 is raised to a position in which it is completely above the height or cross section of the second section of emptying channel 114. This construction results in a laminar flow material flowing at a certain angle less than 90 ° as it flows from the extension of first section of emptying channel 112 into the second section of emptying channel. This results in the circumferential repositioning of the laminar flow material in the second emptying channel section by an angle less than 90 ° relative to its original position in the extension of the first emptying channel section. Accordingly, the height of the diverter controls the angle of the material flow direction between the two elevations. Referring now to Figure 8, there is shown an embodiment of the invention in which a first emptying channel section 120 is defined in a lower half 122 of the mold and an extension 124 of the first emptying section section is defined in one. upper half 125 of the mold. At least a portion of the second emptying channel section 126 is defined in the lower half of the mold 122 where it is intersected at its periphery by the extension of the first emptying section section and at a different elevation of the first channel extension section. of emptying. Figure 6 and Figure 8 are very similar except for the fact that the cross-sectional shape of the emptying channel of Figure 65 is trapezoidal without radial corners whereas in Figure 8 the bottom of the emptying channel is radial. This has few flaws about it. performance of the invention. The derailleur 128, as illustrated, causes the laminar flow material to be positioned in the extension 124 of the first emptying channel section at a height totally above the cross-sectional height of the second emptying channel section 126. material flowing from 124 to 126 therefore travels approximately 90 ° relative to the direction of flow of both the first section extension of empty channel and the second section of empty channel which results in a circumferential repositioning in the second section of emptying channel of laminar flow material stream of approximately 90 ° relative to its previous position in the extension of first section of emptying channel. By reducing the height of the derailleur 128, the material flow direction angle between the two elevations of the intersecting void channels is reduced which reduces the relative circumferential position of the material in flow in the second channel section. emptying in relation to its original position in the first emptying channel section. Referring now to Figure 9, another embodiment of the present invention is illustrated. In this embodiment, a first emptying channel section 130 is defined partially in a lower mold half 132 and partly in an upper mold half 134. A first section extension of casting channel 130 is defined only in the upper half of mold 134. At least a part of a second section of drain channel 136 it is defined only in the lower half of the mold 132 where it is intersected at its periphery by extension of the first emptying channel section and at a different elevation of the extension of the first emptying channel section. A diverter 138 is positioned to cause the positioning of a laminar flow material in the extension 135 of the first emptying section section. Since a part of the first section of emptying channel 130 is already in the upper mold half, the diverter 138 in FIG. 9 does not need to be as tall as the diverter 128 in FIG. 8 to position the laminar flow material at an elevation that is above the total height of the cross section of the second section. emptying channel. Despite the reduced height of the diverter in FIG. 9, a rotation of approximately 90 ° is still achieved since the flow direction from the extension 135 of the first emptying channel section to the second channel section 136 The angular emptying is approximately 901 in relation to the flow direction of the extension 124 of the first section of the emptying channel and the second section of the emptying channel 136. By the progressive reduction of the height of the deviators in FIGS. 9, the angle of the material flow direction between the two elevations of the intersecting recess channels decreases. This reduced angle will reduce the relative circumferential repositioning of the laminar luxury material in the second emptying channel section relative to its previous position in the first emptying channel section. The same principle can be applied to the designs in Figure 3-5 where a reduction of the difference in elevation between the intersecting void channels changes the direction of material flow between the two elevations, which will check the relative rotation of the flow material. In addition, by reversing the position of the emptying channel sections that are spliced along the dividing line at their intersection, the direction of the circumferential repositioning of the laminar flow material in all embodiments of the present invention is compliance with what is described in figures 3-9. Even though the descriptions of Figures 3 to 9 above have been specific as to the location of the emptying channels along the dividing line of a mold, these same methods can be employed in a mold with non-emptying channels. solidification where the emptying channels would not be in a mold division line. While in the previous embodiments the second emptying channel sections are shown positioned approximately perpendicular to the first emptying channel section, this does not have to be the case. Fig. 10 illustrates a mold in which a first emptying channel section 142 communicates with a pair of emptying channels 144 and 146 that are ramified and placed at an angle other than 90 ° relative to the first emptying channel section. 142. When the difference in elevation between the first section of the emptying channel and the second section of the emptying channel of the construction illustrated in Figures 3-9 is included in the intersection of the angular branch emptying channels, a rotation will occur of the laminar flow material. However, by changing the angle between the intersection of the first section of the emptying channel and the second section of the emptying channel from 90 ° at the point of their intersection and change of elevation, the repositioning of the laminar flow material in a circumferential direction in the branch emptying channel sections can be controlled. Referring now to Figure 11, a cavity half 150 is illustrated in accordance with a preferred embodiment of the invention. Partially defined in this cavity half is a first emptying channel section 152. The first emptying channel section communicates with a second emptying channel section 154 also partially defined in cavity half 150. Figure 12 illustrates a core half 156 adapted to be mounted in the cavity half. Another portion 158 of the first emptying channel section and another portion 160 of the second emptying channel section are defined in the core half. In the middle of the core, a projection 162 is also defined which fits into a section with teeth 164 of the first section of emptying channel 152 defined in the half of cavity 150. In this way, a first channel channel channel is defined relatively in an arc shape through the core half and the cavity half. The laminar flow material flow will be such that the laminar flow material will flow in an arc along the first emptying channel section and will approach the second emptying channel section from below and in an approximately normal direction both to the longitudinal axis of the second emptying channel section as to the longitudinal axis of the beginning of the first emptying channel section. This construction offers a clearer control of the material flow direction from the first emptying channel section in the second emptying channel section while still offering changes in composite direction between a first casting channel section and a second section of emptying channel which are required to achieve the relative repositioning of the laminar flow material in a circumferential direction. Referring now to Figure 13, another preferred embodiment of the present invention is illustrated. In this embodiment, a first drainage channel section 170 is illustrated in communication with a second drainage channel section 172. The longitudinal axis of the second drainage channel section is oriented approximately normally relative to the longitudinal axis of the drainage channel. first section of emptying channel. Located at the intersection of the emptying channels is a flow diverter in the form of a spigot 174. As illustrated in FIG. 14, the spike does not extend over the entire height of the second emptying channel section. In addition, the diameter of the pin is smaller than the diameter of either the first section of the emptying channel or the second section of the emptying channel. The height of the pin and the diameter of the pin are suitably controlled to adjust the flow of the material in laminar flow around the pin in such a way that a change of elevation is created in a part of the laminar flow material in the joint. of the two emptying channel sections and consequently creating the changes of direction composed of the melt current flowing from a first emptying channel section to a second emptying channel section creating the relative circumferential repositioning of the material in laminar flow . While the tang 174 is illustrated as the flow diverter, it will be noted that flow diverters of other shapes can also be employed. For example, flow deflectors that are in the form of an arrowhead or a hexagon can also be used. Also, flow diverters with varying cross sections can be used. In other words, a device is provided to divert the flow of the laminar flow material through the use of an insert or spike that can be placed at the intersection of a pair of recess channels where it is desirable to reposition the melt. This allows having an additional means to obtain a repositioning in a typical emptying channel configuration where the emptying channels are all located in the same plane. As is evident from Figure 14, a mold half 176 of the mold body contains both the first pour channel section 170 and the second pour channel section 172. the pin 174 can be removably mounted on the mold half 176 at the intersection of the first empty channel section and second empty channel section. In this way, when a different type of thermoplastic product flows through the emptying channels, a pin of different height, of different diameter or of different cross-section can be used.

The present invention is advantageous even in a situation where there are four cavities employing the emptying channel arrangement illustrated in Figure 1, or even less. In each case, the fusion supplied to each cavity will remain balanced even though thermal variations can be found within the fusion that permeates each cavity. It is important to recognize that thermal variations in the fusion will exist within each cavity and not between the various cavities. It is desirable that the material that penetrates a cavity be the same from one side to another side, the fusion could be repositioned when it is divided in the emptying channel immediately before the approach to a particular cavity. The embodiments of the present invention offered in the descriptions of Figures 3 to 14 describe the emptying channel along a dividing line, these methods offer a pouring channel that solidifies during normal molding cycles. By defining the emptying channels along a mold dividing line, the emptying channel can be removed through conventional means between dividing lines during each molding cycle by opening the dividing line. The impact of the imbalance of the flow is more dramatic when producing high precision products. As a result, many companies that require high precision plastic products must limit the number of cavities in a mold in order to produce product in each of the cavities with the high tolerances required. However, with the balanced system provided by the invention, a mold with a greater number of cavities can be used and higher yields can be obtained in this way. Accordingly, the present invention can significantly reduce the costs of the product in the molding process. Referring now to Figure 15, another form of a laminar flow rotation device 179 is illustrated. This construction includes a void channel division member having a spiral shape and including a first side 180, a second side 182 , a first lateral edge 184 and a second lateral edge 186. The emptying channel division member is positioned in a pouring channel 190 as illustrated in Figure 16. the emptying channel division member has a leading edge 190 and forms a pair of spiral forming surfaces 194 and 196 in which the laminar flow material flows. The emptying channel dividing member also has a trailing edge 198. The emptying channel splitting member of Figure 15 spirals 90 ° between the leading edge 192 and the trailing edge 4 198. This results in the rotation in the circumferential direction of the laminar flow material. The emptying channel division member of Figures 15 and 16 is particularly useful in a non-solidification casting channel type system where the laminar flow material in the emptying channel does not solidify between cycles and is not ejected between molding cycles. The emptying channel division member 179 is normally placed in a emptying channel after the development of non-symmetrical conditions in the laminar flow material and before when repositioning in a circumferential direction is desired. The emptying channel division member 179 is placed in the melt flow channel in such a manner as to divide the flow into two halves. The trailing edge 198 or exit end of the emptying channel division member is twisted in a spiral at some angle relative to the leading edge. The merging approaching the emptying channel division member will be divided into two "D" flow paths. The spiraling void channel division member will cause the displacement of the melt in a circumferential direction. The divided "D" flows are recombined at the trailing edge 198 of the void channel division member. The relative positions of the laminates between them will remain identical. Only its position along the circumference of the emptying channel will have changed. In the modality presented, the two halves of the fusion will reposition at approximately 90 °. However, for the non-solidification casting channel system, the casting channel dividing member can reposition the sheet flow material by less than 90 °, such as for example 70 ° or more than 90 °, for example, if desired 110 ° or up to 150 °. The emptying channel division member 179 can be used at an intersection between two emptying channels. However, they will normally be placed current below a division where undesirable melting variations have been created. Referring now to Figure 17, a set of flow channels is illustrated. In this embodiment, a first flush channel section 200 is divided into a first flush channel section 202 and a second flush channel section 204. The geometry of the flow path is such that, however, the substantially circular diameter of the first emptying channel section leads to non-circular initial portions of the second emptying channel section. The spiral circumference of the non-circular flow paths at the beginning of the second emptying channel causes a repositioning in a circumferential direction of the laminar flow material flowing from the first emptying channel section to each of the second channel sections of the flow channel. emptied The laminar flow material is repositioned at approximately 90 °. It is apparent that, in this embodiment, the emptying channels 200, 202 and 204 are defined by corresponding channel halves in a pair of mold cavity halves 210 and 212. it is also apparent from FIG. 17 that a wall that vertically extends 214 defines the end of the first empty channel section 200 and divides the laminar flow material flow into the pair of second empty channel sections 202 and 204. the non-circular shape of the beginning of the second sections of drain channel 202 and 204 causes a repositioning of the laminar flow material in a radial circumferential direction while maintaining a continuity between the laminates of the laminar flow material in a radial direction. While the inlets to the second empty channel sections 202 and 204 are not circular, once the repositioning is performed, the first empty channel section can take a circular cross section that can be maintained. Referring now to Fig. 18, a top elevation view of the design shown in Fig. 17 is illustrated. Referring now to Fig. 19, a view of the spiral-forming circumferential design of Fig. 17 is presented as a grating channel. flow. The inlet end of the first channel section 200 is fed to the second emptying channel sections 202 and 204. It should be apparent that the spiraling circumference of the non-circular emptying channel section causes repositioning in one direction circumferential of the laminar flow material and where there is available space could be placed current below the junction with the first section of emptying channel. It will also be understood that the non-circular transverse form could be any form in which a form of spiral creation will cause a spiraling effect in the fusion flowing there. It will be noted that the present invention is useful not only in situations in which there is a multi-cavity mold, but also in situations where there is a multi-branching pour channel system feeding a single central mold cavity. Referring now to Figure 20, another type of conventional mold is illustrated. This mold 230 is a mold of multiple cavity emptying channels of single cavity to elaborate a circular object. The mold includes a first section of emptying channel 232, a second section of emptying channel 234 and a pair of tertiary emptying channels 236 and 238 which lead to several gates of a mold cavity 240. FIG. 20 also illustrates the path of the high laminar flow material 246 by shear stress and a laminar flow material 248 of low shear deformation flowing in the cavity of mold 140. Without the presence of a device to reposition the laminar flow material as it flows through the various emptying channels -such as the device presented here- the circular object being molded would have different properties according to which half, approximately, the product is being examined. The magnitude of the flow imbalance is dependent on the type of molded thermoplastic material and the process. Engineering resins, such as PMMA, PA6 / 6 filled with 33% glass, PBT and ABS showed the highest sensitivity to flow imbalance. The polyolefins claimed to be the least susceptible to flow imbalances of the tested materials. Referring now also to Figure 21, there is illustrated a two-cavity mold 250 with a simple emptying channel system. In this embodiment, the in-flow imbalances in the mold occur due to the non-symmetrical parts molded in the cavities of two molds 152 and 152. As a result of the non-symmetrical mold cavities, the laminar flow material should be subjected to differential filling of the two mold cavities 252 and 254 as it flows from the first emptying channel section 256 towards a second emptying channel section 158. thus in the absence of a means for repositioning the laminar flow material, a first layer of high shear deformation of material 250 is oriented towards the first mold cavity 252 and forms the left side of the molded part. A second layer of high shear deformation of material 262 is oriented outwardly from a second mold cavity 254, however, forming the opposite right side of the similar molded part. A first material 264 of low deformation by shear stress is positioned inwardly in the first cavity forming the right side of the molded part. A second material 266 of low shear deformation is placed inwardly in the second mold cavity 254 however forming the opposite left side of the similar molded part. The result is that the two sides of the parts formed in the two cavities will be formed differently. This same condition must be developed in a mold of four cavities in which a second set of cavities and emptying channels will be fed by the same first section of emptying channel. Finally, with reference now to FIG. 22, two spiral-type flow-emptying channel division members 280 and 282 are illustrated, as illustrated, for example, in FIGS. 15 and 16, and can be placed in a second emptying channel section 284 in a non-solidification casting channel arrangement, downstream of a first casting channel section 286. In this way, the laminar flow material flowing in opposite directions in the second casting channel section The emptying 284 is rotated by the two spiraling deviators as it flows either directly into one or more mold cavities or into respective tertiary emptying channels. One can employ more than the pair of drain channel deviators 280 and 282 illustrated in FIG. 22. The invention has been described with reference to several preferred embodiments. Obviously modifications and alterations can be devised when reading and understanding the previous specification. Such alterations and modifications are included within the present invention insofar as they fall within the scope of the appended claims or their equivalents.

Claims (1)

1. CLAIMS A method for controlling non-symmetric conditions of concentric laminations occurring in one direction through the flow path of a stream of laminar flow material in a mold having at least one branching channel, which branches in two directions , comprising: supplying a mold body having at least one mold cavity and a pour channel having at least one branch branching in two directions; flowing a stream of laminar flow material into the emptying channel to fill the at least one mold cavity, the material having unsymmetrical conditions in one direction through its path underneath a branch in the emptying channel; and repositioning the non-symmetrical conditions of the flow material to a desired position in a circumferential direction around the center of the emptying channel path while maintaining continuity between the laminates from about the center to the perimeter of the emptying channel. . The method according to claim 22 wherein the repositioning includes controlling both the quantity and the direction of repositioning of the non-symmetrical conditions to the desired position. 24. The method according to claim 22 wherein the amount of circumferential repositioning of the non-asymmetric conditions to the desired position is approximately 90 degrees. 25. A method according to claim 22 wherein the repositioning comprises the inclusion in the emptying channel of a void channel segment having a spiral circumference with a non-circular transverse shape that is progressively repositioned along the channel of emptied 26. A method according to claim 22 wherein the repositioning comprises the inclusion in the emptying channel of a casting channel segment having a spiral circumference with a non-circular transverse shape progressively repositioned along the emptying channel, with the amount of spiral formation that causes the non-circular transverse shape to be repositioned at an angle of less than 180 degrees. 27. A method according to claim 22 wherein: the repositioning occurs at the intersection of a first emptying channel section of the emptying channel and a second emptying channel section of the emptying channel, the second emptying channel section it extends in a first direction and in a second direction starting from the intersection; and the repositioning comprises the inclusion between the first emptying channel section and the second emptying channel section of a first emptying channel segment having a spiral circumference with a non-circular transverse shape progressively repositioned along the first segment of emptying channel towards the first direction of the second section of emptying channel and a second emptying channel segment having a spiral circumference with a non-circular transverse shape progressively repositioned along the second emptying channel segment towards the second direction of the second emptying channel section. . A method according to claim 22 wherein: the repositioning occurs at the intersection of the first emptying channel section of the emptying channel and a second emptying channel section of the emptying channel, the second emptying section extends in a first direction and in a second direction from the intersection; and the repositioning comprises the inclusion between the first emptying channel section and the second emptying channel section of a first casting channel segment having a spiral circumference with a non-circular cross-sectional shape which is progressively repositioned as length of the first void channel segment towards the first direction of the second void channel section and a second void channel segment having a spiral circumference with a non-circular transverse cut shape progressively repositioned along the second segment of emptying channel to the second direction of the second section of emptying channel, with the amount of repositioning of the non-circular cross-sectional shape of both the first emptying channel segment and the second emptying channel segment forming an angle of less than 180 degrees. A method according to claim 22 wherein the repositioning includes the supply in the emptying channel of a casting channel dividing member having a spiral shape that divides the cross section of the emptying channel substantially in half along of a radial direction to circumferentially reposition the non-symmetrical conditions of the laminar flow material. . A method according to claim 22 wherein the repositioning includes the supply in the emptying channel of a casting channel dividing member having a spiral shape that divides the cross section of the emptying channel substantially in half along of a radial direction for circumferentially repositioning the non-symmetrical conditions of the laminar flow material to a position that is at an angle less than 180 degrees from the original position of the non-symmetrical conditions. . A method according to claim 22 wherein the repositioning occurs at the intersection of a first emptying channel section of the emptying channel and a second emptying channel section of the emptying channel, the second emptying section extends in a first direction and in a second direction from the intersection and the repositioning comprises the inclusion at the intersection of the first section of emptying channel and in the second section of emptying channel of a body having a smaller cross section than the cross section of any of the first empty channel section or the second empty channel section and is shorter in height than the height of any of the first empty channel section or the second empty channel section . . A method according to claim 22 wherein the repositioning occurs at the intersection of a first emptying channel section of the emptying channel and a second emptying channel section of the emptying channel, the second emptying section extends in a first direction and a second direction from the intersection and repositioning comprises the inclusion at the intersection of the first emptying channel section and the second emptying channel section of a body having a cross section that is smaller than the cross section of any of the first empty channel section and the second empty channel section and is shorter in height than the height of any of the first empty channel section or second empty channel section, With the cross-sectional size, the height and position of the body are selected to affect the amount of repositioning of the s non-symmetric conditions that occur. The method according to claim 22 including the supply of a molding body wherein the branch emptying channel includes a first section of emptying channel; a second section of emptying channel that is intersected at an angle by the first section of emptying channel, and the second section of emptying channel extends in a first direction and a second direction starting from the intersection by the third section of emptying channel; a third emptying channel section intersected by one end of the second emptying channel section located in the first direction and a fourth emptying channel section interconnected by one end of the second emptying channel section located in the second direction, said third emptying channel section and the fourth emptying channel section each extend in two directions from the respective intersections with the ends of the second emptying channel; and the repositioning of the non-symmetrical conditions of the flow material is at a position, in a circumferential direction around the center of the path of the second emptying channel section, which is substantially symmetrical from side to side with respect to the third section of void channel and fourth section of void channel such that any unbalance of flow through the third section of void channel and fourth section of void channel significantly improves. The method according to claim 22 including the provision of a molded body wherein the branch emptying channel includes a plurality of branches and the repositioning of the non-symmetrical conditions of the laminar flow material occurs in a plurality of sequential locations a along the emptying channel. 35. The method according to claim 22 wherein the repositioning of the non-symmetrical conditions of the laminar flow material is towards a position which causes the material to fill the at least one mold cavity in selected form. 36. The method according to claim 22 including the supply of the branch emptying channel with a first empty channel section and a second empty channel section, the first empty channel section intersect the second channel section of emptying at an angle, and repositioning the non-symmetrical conditions of the laminar flow material substantially at the intersection of the second emptying channel section by the first emptying channel section. 37. The method according to claim 22 including the supply of the emptying channel with a first section of emptying channel and a second section of emptying channel, the first section of emptying channel intersects the second section of emptying channel at a 90 degree angle, and reposition the non-symmetrical conditions of the laminar flow material substantially at the intersection of the second emptying section by the first emptying channel section. 38. The method according to claim 22 including the supply of the branch emptying channel with a first emptying channel section and a second emptying channel section, with the first emptying channel section intersecting the second emptying section. drain channel and second drain channel section extending at a first angle in a first direction from the intersection by the first section of emptying channel and at a second angle in a second direction from the intersection by the first section of void channel which is other than 90 degrees, and repositioning the non-symmetrical conditions of the laminar flow material substantially at the intersection of the second section of void channel by the first section of void channel. The method according to claim 22 wherein the repositioning of the non-symmetrical conditions of the flow material includes the provision of a first section of channel of emptying and a second section of channel of emptying of the channel of emptying with a first section of channel of emptying intersecting the second section of emptying channel at an angle and the intersection occurs in an area at the periphery of the second section of emptying channel in which the axis of the second section of emptying channel and the axis of the First section of intersecting void channel are at different elevations relative to each other, in that area the laminar flow material flows in a direction between the two elevations that is not the same direction as the flow in any of the first section of emptying channel or second section of emptying channel. The method according to claim 39 which includes the selection of the amount of difference in elevation that occurs between the axis of the first empty channel section and the axis of the second empty channel section to affect the amount of repositioning of the non-symmetrical conditions that occur. The method according to claim 39 including the selection of the angle at the intersection of the first section of the emptying channel and the second section of the emptying channel to affect the amount of repositioning of the non-symmetrical conditions that occur. The method according to claim 39 wherein the repositioning of the non-symmetrical conditions includes the selection of the angle of flow direction of the laminar flow material between the different elevations of the shafts of the first section of emptying channel and second section of emptying channel. . The method according to claim 39 wherein the repositioning of the non-symmetrical conditions includes the provision of an extension of the first section of the void channel having a cross section that is at a different height from the cross section of the second section. emptying channel section, providing a flow diverter in the flow path of the laminar flow material between the first emptying channel section and the second emptying channel section, and selecting the height of the flow diverter to affect the flow direction angle between the elevations of the axis of the second section of the emptying channel and the axis of the first section of the emptying channel, including the extension. . The method according to claim 39 wherein the repositioning includes controlling both the quantity and the direction of repositioning of the non-symmetrical conditions to the desired position. . The method according to claim 39 wherein the amount of circumferential repositioning of the non-symmetrical conditions towards the desired position is about 90 degrees. . The method according to claim 39 including the supply of a mold body wherein the second section of emptying channel extends in a first direction and in a second direction starting from the intersection through the first section of emptying channel; a third section of the emptying channel is intersected by one end of the second emptying channel section located in the first direction and a fourth emptying channel section is intersected by one end of the second emptying channel section located in the second direction, with the third section of emptying channel and the fourth section of emptying channel extending each in two directions starting from their respective intersections with the ends of the second section of emptying channel; and the repositioning of the non-symmetrical conditions of the laminar flow material is in a position, in a circumferential direction around the center of the path of the second emptying channel section, which is substantially symmetrical from side to side in relation to the third The emptying channel section and the fourth emptying channel section such that any flow imbalance through the third emptying channel section and the fourth emptying channel section is significantly improved. . The method according to claim 39 which includes the supply of a molding body wherein the branch emptying channel includes several branches branching in two directions, and the repositioning of the non-symmetrical conditions of laminar flow material occurs in a plurality of sequential locations along the emptying channel. 48. The method according to claim 39 wherein the repositioning of the non-symmetrical conditions of the laminar flow material is towards a position that causes the material to fill the at least one mold cavity in a selected manner. 49. A method for controlling the non-symmetric conditions of concentric laminations occurring in one direction through the flow path of a stream of laminar flow material in a mold having a pair of mold plates, a dividing line between mold plates and a pour channel having at least one branch, which branches in two directions, comprising: supplying a mold body having a pair of mold plates, a dividing line between the mold plates, less a mold cavity, and a drainage channel having at least one branch branching in two directions, the emptying channel includes a first emptying channel section located along the dividing line and a second emptying section. emptying channel located along the dividing line; flowing a stream of laminar flow material into the emptying channel to fill the at least one mold cavity, the material having unsymmetrical conditions in one direction through its downstream path of a branch in the emptying channel; repositioning the non-symmetrical conditions of the flow material to a desired position in a circumferential direction around the center of the emptying channel path while maintaining continuity between the laminates from approximately the center to the perimeter of the emptying channel by supplying the first emptying channel section intersecting the second emptying channel section at an angle, and the intersection occurs in an area at the periphery of the second emptying channel section where the axis of the second emptying channel section and the axis of the first section of intersecting void channel are at different elevations between them, and the area of laminar flow material flows in a direction between the two elevations that is not in the same direction as the flow in any of the first section of emptying channel or second section of emptying channel; allowing the laminar flow material to solidify in the emptying channel during each molding cycle, and subsequently during each molding cycle eject the solidified material from the emptying channel along the dividing line between the two mold plates. 50. The method according to claim 49 which includes the selection of the amount of elevation change occurring between the axis of the first empty channel section and the axis of the second empty channel section to affect the amount of repositioning of the non-symmetric conditions that occurs. 51. The method according to claim 49 which includes selecting the angle at the intersection of the first empty channel section and the second empty channel section to affect the amount of repositioning of the non-symmetrical conditions that occur. 52. The method according to claim 49 wherein the repositioning of the non-symmetrical conditions includes the selection of the angle of the flow direction of the laminar flow material between the different elevations of the axes of the first section of emptying channel and second section of emptying channel. 53. The method according to claim 49 wherein the repositioning of the non-symmetrical conditions includes causing the first emptying channel section to terminate at an end surface having an angle with respect to the plane of the dividing line, and it also includes the selection of the end surface termination angle to affect the amount of repositioning of non-symmetrical conditions that occurs. 54. The method according to claim 49 wherein the repositioning of the non-symmetrical conditions includes the provision of an extension of the first emptying channel section having a cross-section that is at a different height from the cross-section of the second section of the emptying channel, offering a flow diverter in the flow path of the laminar flow material between the first section of emptying channel and the second section of emptying channel, and selecting the height of the flow diverter to affect the angle of the direction of flow between the elevations of the axis of the second section of channel of emptying and the axis of the first section of channel of emptying, including the extension. 55. The method according to claim 49 wherein the repositioning includes controlling both the amount and the direction of repositioning of the non-symmetric conditions to the desired position. 56. The method according to claim 49 wherein the amount of circumferential repositioning of non-symmetrical conditions toward the desired position is approximately 90 degrees. The method according to claim 49 including the supply of a molded body wherein the second section of emptying channel extends in a first direction and in a second direction starting from the intersection by the third section of emptying channel; a third emptying channel section intersected by one end of the second emptying channel section located in the first direction and a fourth emptying channel section intersected by one end of the second emptying channel section located in the second direction, with the third emptying channel section and the fourth emptying channel section each extending in two directions from their respective intersections with the ends of the second emptying channel section; and the repositioning of the non-symmetrical conditions of the laminar flow material is in a position, in a circumferential direction around the center of the path of the second emptying channel section, which is substantially symmetrical from side to side in relation to the third The emptying channel section and the fourth emptying channel section such that any unbalance of flow through the third emptying channel section and the fourth emptying channel section significantly improves. The method according to claim 49 which includes the supply of a mold body wherein the branch emptying channel includes a plurality of branches branching in two directions and the repositioning of non-symmetrical conditions of laminar flow material occurs in a plurality of sequential locations along the emptying channel. . The method according to claim 49 wherein the repositioning of the non-symmetrical conditions of the laminar flow material is towards a position that causes the material to fill the at least one mold cavity in a selected manner. . A mold including a laminate repositor to control within the non-symmetrical mold conditions occurring in a direction through the flow path of the laminates of a stream of laminar flow material, comprising, in combination: a body of mold, said mold body has at least one mold cavity and at least one emptying channel branching in two directions, said at least one emptying channel having an axis and a periphery, said at least one emptying channel having the less a first section of emptying channel and a second section of emptying channel; and said first section of emptying channel intersects said second section of emptying channel; said mold body is adapted to have a stream of laminar flow material flowing in said at least one emptying channel to fill said at least one mold cavity, said at least one emptying channel having unsymmetrical conditions in a direction of through its flow path downstream of the intersection of said first emptying channel section with said second emptying channel section; and a laminate repositioner located in at least a portion of said emptying channel where non-symmetrical conditions occur through the laminar flow material stream, said laminated repositioner repositions non-symmetrical conditions of the flow material in one direction circumferential about the center of the path of said emptying channel to a desired circumferential position while maintaining continuity between the laminates from about the center to the perimeter of said emptying channel. . The mold according to claim 60 wherein the lamination repositioner includes a structure that determines both the amount and the circumferential repositioning direction of the non-symmetrical conditions of the flow material towards the desired position. The mold according to claim 60 wherein said laminate repositioner causes the circumferential repositioning of unsymmetrical conditions of approximately 90 degrees toward the desired position. A mold in accordance with claim 60 wherein laminate repositioner it comprises in said emptying channel a segment of emptying channel having a spiral circumference with a non-circular cross-sectional shape progressively repositioned along said segment of emptying channel. A mold according to claim 60 wherein rolling material repositioner comprises in said emptying channel a segment of emptying channel having a spiral circumference with a non-circular cross-sectional shape that is progressively repositioned along said segment of emptying channel, and the amount of spiral causes the non-circular cross-sectional shape to be repositioned at an angle less than 180 degrees. . A mold according to claim 60 wherein: said second emptying channel section extends in a first direction and in a second direction starting from the intersection of said first emptying section with said second emptying channel section; said rolling repositioner comprises, between said first emptying channel section and said second emptying channel section, a first emptying channel segment having a spiral circumference with a non-circularly transverse cross-sectional shape repositioned along the length of said first void channel segment towards the first direction of said second void channel section and a second void channel segment having a spiral circumference with a non-circular transverse cut shape progressively repositioned along said second segment of emptying channel to the second direction of said second section of emptying channel. . A mold according to claim 60 wherein: said second emptying channel section extends in a first direction and in a second direction starting from the intersection of said first emptying section with said second emptying section; and the laminate repositioner comprises, between said first emptying channel section and said second emptying channel section, a first emptying channel segment having a spiral circumference with a non-circularly transverse cross-sectional shape repositioned along the length of said first void channel segment towards the first direction of said second void channel section in a second segment of the void channel having a spiral circumference with a non-circular transverse cut shape progressively repositioned along said second segment of emptying channel to the second direction of said second emptying channel section, and the amount of repositioning of the non-circular cross-sectional shape of both said first emptying channel segment and said second emptying channel segment is a angle less than 180 degrees. . A mold according to claim 60 wherein said rolling repositioner includes, in said casting channel, a casting channel dividing member having a spiral shape that divides the cross section of said casting channel substantially in half to along a radial direction to circumferentially reposition the non-symmetrical conditions of the laminar flow material. . A mold according to claim 60 wherein said rolling repositioner includes, in said casting channel, a casting channel dividing member having a spiral shape that divides the cross section of said casting channel substantially in half to along a radial direction to circumferentially reposition the non-symmetrical conditions of the laminar flow material to a position that is at an angle of less than 180 degrees relative to the original position of the non-symmetrical conditions. . A mold according to claim 60 wherein said lamination repositioner is located at the intersection of said first emptying channel section and said second emptying channel section of said emptying channel, said second emptying channel section extending into a first direction and in a second direction from the intersection, and said rolling repositioner comprises a body at the intersection of said first emptying channel section and said second emptying section having a cross section that is smaller than the cross section of either the first emptying channel section or the second emptying channel section and which is shorter in height than the height of either the first emptying channel section or the second section of emptying channel. . A mold according to claim 60 wherein said lamination repositioner is located at the intersection of said first emptying channel section of the emptying channel and said second emptying section, said second emptying section extends in a first direction and in a second direction from the intersection, and said rolling repositioner comprises a body at the intersection of the first emptying channel section and the second emptying channel section, said body having a cross section that is smaller than the cross section of any of the first blank section. emptying channel or second emptying channel section and said body is shorter in height than the height of either the first emptying channel section or the second emptying channel section, with the section size cross section, the height and position of the body being selected to determine the amount of repositioning of the non-symmetrical conditions that occurs. A mold according to claim 60 wherein said second emptying channel section extends in a first direction and in a second direction starting from the intersection by said first emptying section section; a third emptying channel section intersected by one end of said second emptying channel section located in the first direction and a fourth emptying channel section intersected by one end of said second emptying channel section located in the second direction, with said third section of emptying channel and said fourth section of emptying channel each extending in two directions from their respective intersections with ends of the second emptying channel; and said rolling repositioner causes repositioning of the non-symmetrical conditions of the flow material towards a position, in a circumferential direction around the center of the path of said second emptying channel section, which is substantially symmetrical from side to side with respect to said third emptying channel section and said fourth emptying channel section such that any imbalance of flow through said third emptying channel section and said fourth emptying section section significantly improves. . A mold according to claim 60 wherein said at least one emptying channel branching at least once in two directions includes a plurality of branches in two directions and further includes a plurality of laminate repositioners of the non-symmetrical conditions of the laminar flow material located in a plurality of sequential locations along the emptying channel. . A mold according to claim 60 wherein said laminate repositioner repositions the non-symmetrical conditions of the laminar flow material to a position that causes the material to fill said at least one mold cavity in a selected manner. 74. A mold according to claim 60 wherein said lamination reposi- tator repositions the non-symmetrical conditions of the laminar flow material substantially at the intersection of said second emptying channel section by said first emptying channel section. 75. A mold according to claim 60 wherein said lamination repositioner includes said first emptying channel section intersecting the second emptying channel section at an angle of approximately 90 degrees and further causing the repositioning of non-emptying conditions. symmetrical of the laminar flow material substantially at the intersection of the second emptying channel section by the first emptying channel section. 76. A mold according to claim 60 wherein said second emptying channel section extends to a first angle in a first direction from the intersection by said first casting channel section and at a second angle in a second one. direction from said intersection by said first section of emptying channel, said angles have a value other than 90 degrees, and said rolling repositioner repositions the non-symmetrical conditions of the laminar flow material substantially at the intersection of said second section of channel of emptying by said first section of emptying channel. 77. A mold according to claim 60 wherein said lamination repositioner includes said first section intersecting said second section of emptying channel at an angle and the intersection occurring in an area at the periphery of said second section of emptying channel. wherein the axis of said second emptying channel section and the axis of said first intersecting emptying channel section meet at different elevations relative to one another, in said area at the periphery of said second emptying section section the Laminar flow material flows in a direction between the two elevations that is not the same direction as the flow in any of said first emptying channel section or said second emptying channel section. 78. A mold according to claim 60 wherein said rolling repositioner includes said first emptying channel section intersecting said second emptying channel section at an angle., the intersection being located in an area at the periphery of said second emptying channel section wherein the axis of said second emptying channel section and the axis of said first intersecting emptying channel section of said emptying channel meet at different elevations between them, in which area the laminar flow material flows in a direction between the two elevations that is not the same direction as the flow in any of said first emptying channel section or said second emptying channel section. 79. A mold according to claim 78 wherein the amount of elevation difference between the axis of said first empty channel section and the axis of said second empty channel section affects the amount of repositioning of the non-symmetric conditions. what happen. 80. A mold according to claim 78 wherein the angle at the intersection of the first empty channel section and the second empty channel section affects the amount of repositioning of the non-symmetrical conditions that occurs. 81. A mold according to claim 78 wherein the angle of the flow direction of the laminar flow material between the elevation difference between the axes of said first emptying channel section and said second emptying channel section is selected to affect the amount of repositioning of non-symmetrical conditions that occurs. A mold according to claim 78 wherein said emptying channel includes an extension of said first emptying channel section having a cross section that is at a different height than the cross section of said second emptying channel section. further includes a flow diverter in the flow path of the laminar flow material between said first emptying channel section and said second emptying section, and the height of said flow diverter is selected to affect the angle in the direction of flow between the elevations of the axis of said second emptying channel section and the axis of said first emptying channel section, includes said extension. The mold according to claim 78 wherein the laminate repositioner includes a structure that determines both the amount and direction of circumferential repositioning of the non-symmetrical conditions of the flow material toward the desired position. . The mold according to claim 78 wherein said laminate repositioner causes a circumferential repositioning of unsymmetrical conditions of approximately 90 degrees toward the desired position. A mold according to claim 78 wherein said second emptying channel section extends in a first direction and in a second direction from the intersection by said first emptying section section; a third emptying channel section intersected by one end of said second emptying channel section located in the first direction and a fourth emptying channel section intersected by one end of said second emptying channel section located in the second direction, with said third section of emptying channel and said fourth section of emptying channel each extending in two directions from their respective intersections with ends of the second emptying channel; and said laminate repositioner causes repositioning of the non-symmetrical conditions of the material in flow toward a position, in a circumferential direction about the path axis of said second discharge channel section, which is substantially symmetrical from side to side with respect to said third emptying channel section and said fourth emptying channel section such that any imbalance of flow through said third emptying channel section and said fourth emptying channel section significantly improves. A mold according to claim 78 wherein said at least one emptying channel branching at least once in two directions includes a plurality of branches in two directions and further includes a plurality of laminate repositioners of the non-symmetrical conditions of the laminar flow material located in a plurality of sequential locations along the emptying channel. . A mold according to claim 78 wherein said laminate repositioner repositions the non-symmetrical conditions of the laminar flow material to a position that causes the material to fill said at least one mold cavity in a selected manner. . A mold including a laminate repositor to control within the non-symmetrical mold conditions occurring in a direction through the laminate flow path of a stream of laminar flow material, comprising, in combination: a mold body having a pair of mold plates and a dividing line between said mold plates, said mold body has at least one mold cavity and at least one emptying channel branching in two directions, said at least one channel The emptying has an axis and a periphery, said at least one emptying channel having at least a first section of emptying channel and a second section of emptying channel located along the dividing line; and said first section of emptying channel intersects said second section of emptying channel; said mold body is adapted to have a stream of laminar flow material in said at least one void channel to fill said at least one mold cavity, and adapter to allow solidification of the laminar flow material during each molding cycle and to eject the solidified emptying channel from the mold body during each molding cycle, the laminar flow material in said at least one emptying channel has non-symmetrical conditions in one direction through its current flow path below the intersection of said first section of emptying channel with said second section of emptying channel; and a laminate repositioner located in at least a portion of said emptying channel where non-symmetrical conditions occur through the laminar flow material stream, said laminated repositioner repositions non-symmetrical conditions of the flow material in one direction circumferential about the center of the path of said emptying channel to a desired circumferential position while maintaining the continuity between laminates from about the center to the perimeter of said emptying channel; said rolling repositioner includes said first emptying channel section intersecting said second emptying channel section at an angle with the intersection being located in an area at the periphery of said second emptying channel section where the axis of said second section of emptying channel and the axis of said first section of intersecting emptying channel of said emptying channel are at different elevations between them, in which area the laminar flow material flows in a direction between the two elevations that is not the same direction as the flow in any of the first empty channel section or second empty channel section. A mold according to claim 88 wherein the amount of elevation difference between the axis of said first empty channel section and the axis of said second empty channel section affects the amount of repositioning of the non-symmetric conditions that occurs . . A mold according to claim 88 wherein the angle at the intersection of the first empty channel section and the second empty channel section affects the amount of repositioning of the non-symmetric conditions that occurs. 91. A mold according to claim 88 wherein the angle of the flow direction of the laminar flow material between the elevation difference between the axes of said first emptying channel section and said second emptying channel section is selected to affect the amount of repositioning of non-symmetrical conditions that occurs. 92. The method according to claim 88 wherein said first emptying channel section terminates at an end surface having an angle relative to the plane of the dividing line, and the ending surface ending angle is chosen. to affect the amount of repositioning of non-symmetrical conditions that occur. 93. A mold according to claim 88 wherein said emptying channel includes an extension of said first emptying channel section having a cross section that is at a different height from the cross section of said second emptying channel section. casting and further includes a flow diverter in the flow path of the laminar flow material between said first emptying channel section and said second emptying channel section, and the height of said flow diverter is chosen to affect the angle of flow. the direction of flow between the elevations of the axis of said second emptying channel section and the axis of said first emptying channel section including said extension. The mold according to claim 88 wherein the lamination repositioner includes a structure that determines both the amount and direction of circumferential repositioning and the non-symmetrical conditions of the flow material at the determined position. The mold according to claim 88 wherein said lamination repositioner causes the circumferential repositioning of unsymmetrical conditions of approximately 90 degrees relative to the desired position. A mold according to claim 88 wherein said second emptying channel section extends in a first direction and in a second direction from the intersection by said first emptying section section; a third emptying channel section intersected by one end of said second emptying channel section located in the first direction and a fourth emptying channel section intersected by one end of said second emptying channel section located in the second direction, with said third section of emptying channel and said fourth section of emptying channel each extending in two directions from their respective intersections with the ends of said second emptying channel; and said rolling repositioner causes the repositioning of the non-symmetrical conditions of the flow material towards a position, in a circumferential direction around the center of the path of said second emptying channel section, which is substantially symmetrical from side to side with respect to said third emptying channel section and said fourth emptying channel section such that any imbalance of flow through said third emptying channel section and said fourth emptying section section significantly improves. . A mold according to claim 88 wherein said at least one emptying channel branching at least once in two directions includes a plurality of branches in two directions and further includes a plurality of laminate repositioners of the non-symmetrical conditions of the laminar flow material located in a plurality of sequential locations along the emptying channel. . A mold according to claim 88 wherein said laminate repositioner repositions the non-symmetrical conditions of the laminar flow material to a position that causes the material to fill said at least one mold cavity in a selected manner.