Abstract: A method and apparatus for the molding of a thermoplastic with a large cross-section is provided. The plastic is extruded into a closed mold where sufficient pressure is maintained on the plastic to offset the shrinkage to the extrudate during cooling. In particular, the mold cavity is capable of changing its volume as molten plastic is forced into it while also changing the pressure within it against which the plastic is being extruded. This is achieved by positioning a movable piston as one end of the mold, and applying pressure to the piston so that a predetermined pressure within the mold is maintained. Once the desired amount of plastic is within the cavity, pressure is maintained while it solidifies, following which the finished product is ejected.

Abstract: The method and device of the present invention include an injection mold, an injection nozzle communicating with said injection mold via a single injection channel, a first feeding means for feeding a first resin to said nozzle and injection mold, a second feeding means for feeding a predetermined amount of a second resin to said nozzle and injection mold operative to leave second resin in said nozzle, and means to remove out of said nozzle the second resin left therein.

Abstract: A method and apparatus for injection blow molding hollow plastic articles characterized by increased capacity due to back-to-back operations or stack molding and a rapid and efficient operating cycle. The process and apparatus includes back-to-back injection mold stations, back-to-back blow mold stations located on each side of and adjacent said injection mold stations in side-by-side relationship therewith, back-to-back ejection stations located adjacent each of said blow mold stations in side-by-side relationship, and blow cores cooperating with said injection stations and blow stations, wherein the operation of said cores is facilitated by an overlapping cycle.

Abstract: Method and apparatus for the preparation of oriented hollow articles of moldable organic plastic material which is characterized by a rapid operating cycle and an inexpensive procedure. The disclosure teaches a streamlined operating cycle utilizing a reduced number of blow molds while retaining high productivity.

Abstract: Method for the preparation of oriented hollow articles of moldable organic plastic material which is characterized by a rapid operating cycle and a final article free from objectionable capacity. The disclosure teaches an injection molding station for controlled removal of parisons after altering the heat content thereof under conditions avoiding crystallization and thereby freeing the injection station for the formation of a second parison.

Abstract: Method and apparatus for forming oriented, blown objects of moldable plastic material requiring prolonged tempering cycles to obtain conditions suitable for orientation. Disclosure provides a multiplicity of tempering molds in spaced relationship to each other for retaining and tempering parisons prior to orientation and blowing in a tempering cycle, whereby the tempering molds receive and release parisons seriatim, and whereby the overall operating cycle is substantially unaffected by the number of tempering molds.

Abstract: Method and apparatus for forming oriented, blown objects of moldable plastic material requiring prolonged tempering cycles to obtain conditions suitable for orientation. Disclosure provides a multiplicity of tempering molds in spaced relationship to each other for retaining and tempering parisons prior to orientation and blowing in a tempering cycle, whereby the tempering molds receive and release parisons seriatim, and whereby the overall operating cycle is substantially unaffected by the number of tempering molds.

Abstract: Apparatus and method for forming oriented, blown objects of moldable plastic material requiring transfer of parisons first to tempering molds and then to finishing molds. Disclosure provides a plurality of injection molds for producing a plurality of parisons in spaced relationship to each other and a multiplicity of blow molds in spaced relationship to each other wherein the blow molds have a different center spacing than the injection molds. Disclosure provides means for varying the center spacing of the parisons.

Abstract: Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature controlled first mold engageable with said first core and parison, means for separating the first core from the first mold and parison contained therein, a second core in spaced relationship to the first core, means for transferring the parison to the second core, a blow mold in spaced relationship to said first mold for fully expanding the parison and means for transferring the second core and parison to the blow mold, wherein the blow mold is stationary and the second core with parison thereon is brought into alignment with the blow mold and is inserted therein.

Abstract: Method of forming an interlocked assembly of a base cup and a hollow plastic article including the steps of providing a groove in the side wall of either the article or cup engageable with a protrusion in the side wall of the other of said article or cup, internally pressurizing the article to harden same and outwardly expand the side walls, and forming an interlocked assembly by placing the base cup on the article to deform the side walls of the base cup by the hardened article and snap the groove and protrusion together.

Abstract: Lined articles having an outer plastic layer of transparent or translucent plastic and a decorated inner plastic layer so that the decoration is visible through the outer layer. The article is prepared by decorating a plastic liner and molding a transparent or translucent plastic around the decorated liner.

Abstract: Disclosure teaches a method for rapid processing parisons, especially a method for maintaining a relatively elevated inside temperature of said parison at the time of its removal from the parison mold characterized by removing the core from the parison while confining it on its outside and while maintaining a positive fluid pressure on the inside of the parison whereby a neck mold may be kept in engagement with the parison.

Abstract: Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature controlled first mold engageable with said first core and parison, means for separating the first core from the first mold and parison contained therein, a second core in spaced relationship to the first core, means for transferring the parison to the second core, a blow mold in spaced relationship to said first mold for fully expanding the parison and means for transferring the second core and parison to the blow mold, wherein the blow mold is stationary and the second core with parison thereon is brought into alignment with the blow mold and is inserted therein.

Abstract: Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature controlled first mold engageable with said first core and parison, means for separating the first core from the first mold and parison contained therein, a second core in spaced relationship to the first core, means for transferring the parison to the second core, a blow mold in spaced relationship to said first mold for fully expanding the parison and means for transferring the second core and parison to the blow mold, wherein the blow mold is stationary and the second core with parison thereon is brought into alignment with the blow mold and is inserted therein.

Abstract: Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature controlled first mold engageable with said first core and parison, means for separating the first core from the first mold and parison contained therein, a second core in spaced relationship to the first core, means for transferring the parison to the second core, a blow mold in spaced relationship to said first mold for fully expanding the parison and means for transferring the second core and parison to the blow mold, wherein the blow mold is stationary and the second core with parison thereon is brought into alignment with the blow mold and is inserted therein.

Abstract: Apparatus for the preparation of hollow plastic articles wherein a more rapid operating cycle is obtained with less effect upon the temperature of the parison. The apparatus includes a first core, means for providing a parison thereon, a temperature controlled first mold engageable with said first core and parison, means for separating the first core from the first mold and parison contained therein, a second core in spaced relationship to the first core, means for transferring the parison to the second core, a blow mold in spaced relationship to said first mold for fully expanding the parison and means for transferring the second core and parison to the blow mold, wherein the blow mold is stationary and the second core with parison thereon is brought into alignment with the blow mold and is inserted therein.

Abstract: Method and apparatus for the preparation of hollow plastic articles wherein an improved injection blow molding process is obtained and improved temperature control of the parison is obtained by the use of a plurality of molds and cores. At least one temperature controlled mold and core is used to adjust the temperature of the parison. The temperature adjusted parison is then stretched and/or blown in at least one second mold by a second core, cooled therein and transferred by at least one third ejector core to additional finishing molds for further cooling or to removal means.

Abstract: Method and apparatus for the preparation of oriented hollow objects of moldable organic plastic material by providing a parison on a first blow core, expanding said parison into an intermediate shape, as by pre-expanding it, transferring said pre-expanded parison to a second blow core, finally extending and expanding said parison to form said hollow object in finished shape.

Abstract: Method and apparatus for the preparation of hollow plastic articles wherein improved temperature control of the parison is obtained by altering the heat content of a parison by a first, temperature controlled mold and core, transferring the parison to a second, temperature controlled mold, and substantially equalizing the temperature distribution of the parison by heat exchange with the second mold.

Abstract: Multilayered, hollow plastic articles and method for making same are disclosed. The articles have a base portion, integral side walls and an integral open neck or rim portion. The articles also have an inner first layer of thermoplastic material and an outer second layer of pressure molded, thermoplastic material, wherein the inner layer includes a heat absorbing and/or dissipating base portion.