A device for expanding and shaping the end of pipes includes a head with means for connecting to an elastically deformable expanding element with a first elongated portion for being introduced into the end of the pipe, the expanding element having a central through hole, and an extracting member including an expansion head suitable to move from outside to inside the central through hole of the expanding element or the other way round, so as to cause deformation, or to allow the expanding element to elastically return to an undeformed state, means for moving said extracting member, wherein: —the connecting means is suitable for steadily constraining the expanding element to the head for a plurality of different pipes and to allow the expanding element to be replaced when worn out, the elongated portion of the expanding element is made of an elastically deformable polyurethane plastic material having certain characteristics.

A method of deposition is disclosed. The method can include dispensing a formable material over a substrate, where the substrate includes a non-uniform surface topography, and where the substrate includes an active zone and an exclusion zone. The method can also include curing the formable material in the exclusion zone to form a circular edge between the exclusion zone and the active zone, contacting the formable material with a superstrate, and curing the formable material in the active zone to form a layer over the substrate, wherein curing is performed while the superstrate is contacting the formable material.

A method of deposition is disclosed. The method can include dispensing a formable material over a substrate, where the substrate includes a non-uniform surface topography, and where the substrate includes an active zone and an exclusion zone. The method can also include curing the formable material in the exclusion zone to form a circular edge between the exclusion zone and the active zone, contacting the formable material with a superstrate, and curing the formable material in the active zone to form a layer over the substrate, wherein curing is performed while the superstrate is contacting the formable material.

A method for producing a contact lens having a water contact angle below about 90° involves preparing a molding resin comprising a polyether modified polyolefin; forming the molding resin into a mold; preparing a contact lens composition; filling the contact lens composition into the mold; and polymerizing the contact lens composition to form a contact lens. A method of inducing water contact angle below 90° and improved surface wettability of a contact lens involves cast polymerizing a mixture of monomers in a mold formed from a molding resin containing a polyether modified polyolefin to form a contact lens having a water contact angle of less than about 90°. Single-use molds for contact lens manufacture are also provided.

Provided is a method for manufacturing a mold used in an injection molding device. The manufacturing method includes: a first step of shaping a stacked body as a part of the mold by discharging a shaping material to stack layers on a base plate; and a second step of manufacturing the mold including a mold base, the base plate, and the stacked body by incorporating the base plate on which the stacked body is shaped inside an opening provided in the mold base.

A production method of a mold having a recessed pattern includes: a plate precursor preparation step of preparing a plate precursor having a pedestal on which a protruding pattern is disposed; a resin plate preparation step of preparing a thermoplastic resin plate having a recessed step portion; and a resin plate precursor production step of producing a thermoplastic resin plate precursor, the resin plate precursor production step including a positioning step of positioning the protruding pattern of the plate precursor and a center position of the recessed step portion, and a recessed pattern forming step of forming a recessed pattern having an inverted shape of the protruding pattern on the thermoplastic resin plate by pressing the protruding pattern of the heated plate precursor and the pedestal against the recessed step portion, thereafter cooling the plate precursor, and separating the plate precursor from the thermoplastic resin plate.

A production method of a mold having a recessed pattern includes: a plate precursor preparation step of preparing a plate precursor having a pedestal on which a protruding pattern is disposed; a resin plate preparation step of preparing a thermoplastic resin plate having a recessed step portion; and a resin plate precursor production step of producing a thermoplastic resin plate precursor, the resin plate precursor production step including a positioning step of positioning the protruding pattern of the plate precursor and a center position of the recessed step portion, and a recessed pattern forming step of forming a recessed pattern having an inverted shape of the protruding pattern on the thermoplastic resin plate by pressing the protruding pattern of the heated plate precursor and the pedestal against the recessed step portion, thereafter cooling the plate precursor, and separating the plate precursor from the thermoplastic resin plate.

The present invention relates to a freeze-drying mold and a method for manufacturing water-soluble polymer balls using the same, more specifically to a freeze-drying mold that is provided with a first mold having a plurality of first accommodation grooves formed on underside thereof and a plurality of discharge portions formed on top thereof to communicate with the plurality of first accommodation grooves and a second mold having a plurality of second accommodation grooves formed on top thereof to be facingly coupled to the plurality of first accommodation grooves of the first mold to thus provide a plurality of accommodation portions, and a method for manufacturing water-soluble polymer balls using the same.

According to the present invention, the freeze-drying mold is capable of controlling the shrinkage rate of a solution in a freeze-drying process to make freeze-dried spherical materials, easily separating the made freeze-dried materials therefrom, and optimizing a drying efficiency thereof, and the method for manufacturing water-soluble polymer balls using the same is carried out so that the water-soluble polymer balls are constant in pore sizes and distributions, have high strength, and do not have any films on the surfaces thereof.

The present invention relates to a freeze-drying mold and a method for manufacturing water-soluble polymer balls using the same, more specifically to a freeze-drying mold that is provided with a first mold having a plurality of first accommodation grooves formed on underside thereof and a plurality of discharge portions formed on top thereof to communicate with the plurality of first accommodation grooves and a second mold having a plurality of second accommodation grooves formed on top thereof to be facingly coupled to the plurality of first accommodation grooves of the first mold to thus provide a plurality of accommodation portions, and a method for manufacturing water-soluble polymer balls using the same.

According to the present invention, the freeze-drying mold is capable of controlling the shrinkage rate of a solution in a freeze-drying process to make freeze-dried spherical materials, easily separating the made freeze-dried materials therefrom, and optimizing a drying efficiency thereof, and the method for manufacturing water-soluble polymer balls using the same is carried out so that the water-soluble polymer balls are constant in pore sizes and distributions, have high strength, and do not have any films on the surfaces thereof.

The present disclosure provides a mold for molding a polyurethane condom, and methods for manufacturing and using the mold. The mold (200) has a surface roughness of 0.2 or less, is formed from a thermoplastic polymer having a surface tension of 10-35 mN/m. The mold (200) for molding a polyurethane condom is prepared by injection molding the thermoplastic polymer. When the mold (200) is used, the mold (200) is hung vertically and dipped in an emulsion containing a polyurethane resin to obtain a dipped mold (200), then the dipped mold (200) is removed and dried to form a polyurethane film on its surface, and then demolded to obtain a polyurethane condom (100). The condom formed by the mold (200) is thin and has excellent flexibility and strength, satisfying the market demand for the product.