A compressible decoy construction involves a thin rubber roto molded outer shell lined with a thicker layer of foam rubber. The interior of the decoy is hollow, thus allowing the decoy to be folded or compressed into a small mass such that when the compressive force is removed, the decoy returns to its full shape due to the memory of the foam rubber lining.

The rotational molding system comprising an internal air cooling system disposed on the mold and configured for one or more of selectively controlling air flow into or out of a cavity of the mold for actively cooling an interior surface of a part, pressurizing the cavity of the mold, allowing pressure equalization, or venting of off-gases. A first thermocouple and a second thermocouple disposed within the cavity to measure a temperature at the exterior surface of a part and the mold cavity. A control system in electronic communication with both said first thermocouple and said second thermocouple, may selectively operate the internal air cooling system to maintain the temperature of the cavity and the part's outside surface substantially the same. The mold and/or the oven containing the mold may be disposed for rotation about a first axis and a second axis during the rotational molding process.

The rotational molding system comprising an internal air cooling system disposed on the mold and configured for one or more of selectively controlling air flow into or out of a cavity of the mold for actively cooling an interior surface of a part, pressurizing the cavity of the mold, allowing pressure equalization, or venting of off-gases. A first thermocouple and a second thermocouple disposed within the cavity to measure a temperature at the exterior surface of a part and the mold cavity. A control system in electronic communication with both said first thermocouple and said second thermocouple, may selectively operate the internal air cooling system to maintain the temperature of the cavity and the part's outside surface substantially the same. The mold and/or the oven containing the mold may be disposed for rotation about a first axis and a second axis during the rotational molding process.

Crosslinkable composition comprising: (a) from 80% by weight to 98% by weight, preferably from 85% by weight to 95% by weight, of at least one high density polyethylene (HDPE); (b) from 2% by weight to 20% by weight, preferably from 5% by weight to 15% by weight, of at least one linear low density polyethylene (LLDPE); (c) from 0.2 parts by weight to 1.5 parts by weight, preferably from 0.5 parts by weight to 0.8 parts by weight, with respect to 100 parts by weight of (a)+(b), of at least one crosslinking agent selected from organic peroxides; (d) from 0.2 parts by weight to 2.5 parts by weight, preferably from 0.5 parts by weight to 1.0 parts by weight, with respect to 100 parts by weight of (a)+(b), of at least one co-crosslinking agent selected from allyl compounds. Said crosslinkable composition can advantageously be used in rotational molding (“rotomolding”).

Crosslinkable composition comprising: (a) from 80% by weight to 98% by weight, preferably from 85% by weight to 95% by weight, of at least one high density polyethylene (HDPE); (b) from 2% by weight to 20% by weight, preferably from 5% by weight to 15% by weight, of at least one linear low density polyethylene (LLDPE); (c) from 0.2 parts by weight to 1.5 parts by weight, preferably from 0.5 parts by weight to 0.8 parts by weight, with respect to 100 parts by weight of (a)+(b), of at least one crosslinking agent selected from organic peroxides; (d) from 0.2 parts by weight to 2.5 parts by weight, preferably from 0.5 parts by weight to 1.0 parts by weight, with respect to 100 parts by weight of (a)+(b), of at least one co-crosslinking agent selected from allyl compounds. Said crosslinkable composition can advantageously be used in rotational molding (“rotomolding”).

A method for production of a molded part made of plastic by rotational molding includes placing a starting material in a form of at least one of a plastic or a plastic precursor into a rotational melt mold that is fitted with at least one magnetic element. The rotational melt mold is rotated and, while the rotational melt mold is rotating, the starting material is shaped. The at least one magnetic element rotates together with the rotational melt mold while the starting material is being shaped. The starting material and the at least one magnetic element are configured in such a way that the starting material and the at least one magnetic element interact magnetically such that a portion of the starting material is attracted and held in place by the at least one magnetic element while the starting material is being shaped.

A method for production of a molded part made of plastic by rotational molding includes placing a starting material in a form of at least one of a plastic or a plastic precursor into a rotational melt mold that is fitted with at least one magnetic element. The rotational melt mold is rotated and, while the rotational melt mold is rotating, the starting material is shaped. The at least one magnetic element rotates together with the rotational melt mold while the starting material is being shaped. The starting material and the at least one magnetic element are configured in such a way that the starting material and the at least one magnetic element interact magnetically such that a portion of the starting material is attracted and held in place by the at least one magnetic element while the starting material is being shaped.

The present disclosure describes mannequins providing realistic human forms to train personnel in organizations such as police departments, fire departments, the military, paramilitary organizations, private military contractors, etc. Mannequins may serve as targets or may be forms useful for various search or search and rescue operations. One aspect of the present disclosure may describe a manufacturing process for a mannequin designed to serve as a target for non-lethal ammunition or live. A cold rotational molding process may be used to manufacture such a mannequin. A mannequin may emulate one or more physical characteristics of a live human. In one embodiment of a present disclosure, a mannequin may include a thermal heating system radiating thermal energy from within a mannequin and may be configured such that the exterior of the mannequin emits thermal energy like that of a live human in both distribution through the body and intensity.

Simulated pregnant abdominal systems and associated devices, systems, and methods are provided. The pregnant abdominal systems allow an interactive scenario simulating a routine gestation palpation of a fetal baby, the performance of an external cephalic version as well as the Leopold's Maneuvers. Further, the pregnant abdominal systems can be used as a platform to physically hear the fetus heartbeat using stethoscope, Doppler instrument, or a prenatal monitor. Further, in some implementations the fetus can be visualized using standard ultrasound systems.

Simulated pregnant abdominal systems and associated devices, systems, and methods are provided. The pregnant abdominal systems allow an interactive scenario simulating a routine gestation palpation of a fetal baby, the performance of an external cephalic version as well as the Leopold's Maneuvers. Further, the pregnant abdominal systems can be used as a platform to physically hear the fetus heartbeat using stethoscope, Doppler instrument, or a prenatal monitor. Further, in some implementations the fetus can be visualized using standard ultrasound systems.