An illustrative dye sublimation apparatus may include a sealed chamber and a heating section. More specifically, the sealed chamber is thermally insulated and substantially airtight in order to keep the heat generated by the heating section within the sealed chamber. Compared to the conventional systems that are open-air and require direct heat, the embodiments disclosed herein generate a uniform or nearly uniform heat distribution throughout the sealed chamber, which results in a more consistent and efficient dye sublimation process.

An illustrative dye sublimation apparatus (also referred to as a dye sublimation machine) may have at least four stations, each station implementing a discrete step of a sublimation cycle. Multiple beds are rotatably mounted such that the beds pass through the stations to perform the corresponding steps. Therefore, the sublimation apparatus may perform multiple sublimation cycles simultaneously with the beds containing printed sheets and substrates at different steps of the multiple sublimation cycles. As the beds are rotatably mounted, the sublimation apparatus may allow for a fixed loading and unloading station proximate to a fixed, dedicated personnel station.

An apparatus for texturing a plastic substrate, while forming a dye sublimation image in the plastic substrate, wherein the plastic substrate has a first side and a second side, is provided. A textured cover is on a side of a platen, wherein the platen is on a first, untextured side of the textured cover. A first side of the dye carrier is on a second, textured side of the textured cover, and wherein the plastic substrate is supported on a second side of the dye carrier, wherein a first side of the plastic substrate is supported by the dye carrier, wherein the textured side of the textured cover has a texture to be transferred to the plastic substrate. A membrane is on the second side of the plastic substrate. A vacuum pump provides a vacuum between the membrane and the platen. A heater is positioned to heat the plastic substrate.

Methods, apparatus and system for decorating plastic articles having an uneven surface or hollow structure are disclosed. An assembly comprising a transfer pad and a flexible heat transfer die comprising a thermal interface material (TIM) replace the hard rubber die in a hot-stamping process to fuse indicia into the surface. The assembly modifies ordinary pad printing into a hot-stamping process that transfers indicia onto uneven surfaces. A pad printing machine or other robotics is used to move the assembly from a position of heating to a position of compressing the ink transfer to the surface of the article.

An illustrative dye sublimation apparatus may include a heating surface that may have multiple zones. Each zone may include a single individually controlled heater. A controller may control the heater to generate a range of heat and not merely turn the heater ON and OFF. Therefore, one or more controllers may individually regulate heat from corresponding heaters in the zones thereby maintaining a constant and nearly constant temperature throughout the bed of the dye sublimation apparatus in the heating surface. Furthermore, one or more controllers may maintain a first range of temperature during a first state of a dye sublimation process and a second range of temperature during a second stage of the dye sublimation process.

An illustrative heating section in a dye sublimation apparatus may include one or more individually controllable fans. More specifically, a computer or a controller may control speed and/or orientation of the fans for a convective heat transfer to a printed sheet in the heating section. Furthermore, the speed and/or orientation of the fans may be dynamically adjusted based upon the temperature requirement of different stages of the dye sublimation process. Compared to the conventional systems that rely only upon radiative heat which generally results in non-uniform heat distribution within the heating section, the embodiments disclosed herein generate a uniform or nearly uniform heat distribution and also avoid hot spots within the heating section.

Examples relate to receiving image data of an image to be sublimation printed, wherein the image data comprising one or more colours to be printed, and a corresponding printing liquid density of the one or more colours. Based on the received image data, a sublimation energy to use to transfer printed printing liquid representing the image into a material is determined, and the determined sublimation energy is provided to a sublimator of a printer for transferring the image.

An illustrative dye sublimation apparatus (also referred to as a dye sublimation machine) may have a pair of conveyor belts to perform continuous sublimation cycles using a continuous feed of printed sheet and substrate. For example, the continuous feed dye sublimation apparatus may receive substrate directly from an extrusion machine, which saves time and effort over traditional methods that require separate preparing and loading steps. The pair of conveyor belts may then apply pressure and heat to the printed sheet and substrate in order to facilitate dye sublimation.

An illustrative heating section of a dye sublimation machine may utilize a plurality of configurable pyrometers. The pyrometers may take the corresponding temperature measurements remotely without interacting with any mechanical moving parts of the dye sublimation machine and therefore may be more robust against breakage. The pyrometers may be directed at the membrane covering the printed sheet and therefore may provide more accurate temperature measurements. Furthermore, the angular orientation of the pyrometers may be configured that may allow the pyrometers to dynamically measure the temperature of multiple spots in the heating section. In addition to the pyrometers in the heating section, a plurality of pyrometers may be provided to measure the temperature in the cooling section of the dye sublimation machine.

An illustrative dye sublimation apparatus may comprise a pressure housing in the heating component. The pressure housing may apply a positive pressure on a membrane covering a combination of a printed sheet and a substrate. The positive pressure applied by the pressure housing may cause the printed sheet and substrate to snugly press against each other throughout a heating cycle. Furthermore, the positive pressure applied by the pressure housing may be even or approximately even throughout an upper surface of the membrane. The dye sublimation apparatus may utilize the pressure housing in addition or as an alternative to a negative pressure applied by a vacuum pump.