A glass forming machine and a method for manufacturing formed glass parisons. A glass forming machine includes a blank side for forming parisons from gobs of molten glass. The blank side includes a plunger and a blank mould. The plunger can be moved into the blank mould up to an end position. The plunger can be moved out of the blank mould up to a start position. The glass forming machine includes a glass feeding device which is configured to bring a gob of molten glass into the blank mould. The glass forming machine includes a measuring device which is configured to measure the end position of the plunger. The glass feeding device is configured such that the size of a gob of molten glass depends on the end position previously reached during operation. Parisons of good quality can be produced with a bigger tolerance of mould volumina.

Device for forming a glass article, including a forming mold for receiving a glass blank, and a gas injection device with a blowing head intended to be received in the mouth of the blank, the gas injection device including a pressurized gas inlet, a first injection channel connecting the pressurized gas inlet to at least one outlet port opening into the inside cavity, through a first control solenoid valve, with a first pressure sensor and a first temperature sensor, a vent channel connecting the inside cavity to the outside air, the vent channel being equipped with a second pressure sensor and a second temperature sensor, an electro-pneumatic control unit being configured to control the first control solenoid valve according to the pressure measurements and temperature measurements.

A muffle for a glass tube forming process includes an inlet end coupled to a bowl, an outlet end having an inner dimension larger than an inner dimension of the inlet end, and a sidewall extending from inlet end to the outlet end. A radial distance from a center axis of the muffle to an inner surface of the sidewall increases from the inlet end to the outlet end and the sidewall is substantially free of abrupt changes in the radial distance that produce instability regions within the muffle. The muffle includes a channel between an outer surface of a portion of the sidewall and an insulating layer disposed about the sidewall, the channel being operable to pass a heat transfer fluid into thermal communication with the sidewall to provide cooling to the muffle. Glass forming systems including the muffle and glass tube forming processes are also disclosed.

A process for producing glass bottles with shoulders includes a preform preparation step and a finishing step, in which a compressed gas is blown and the preform is rotated by 180 between the preform mold and the finishing mould. Preform preparation is achieved by introducing a glass gob into the mold through an upper aperture; inserting a blowing sleeve into the glass gob, the end of the sleeve extending beyond the shoulders of the outline of the preform of the bottle, the sleeve being closed by a plunger element slidable within its interior; opening the cavity of the sleeve to disengage the plunger element; and blowing air through the sleeve, wherein the final finishing step is achieved in an open preform mold, the volume of the cavity of the finishing mold being greater than the volume of the cavity of the preform mold by 5-20%.

A process for producing glass bottles with shoulders includes a preform preparation step and a finishing step, in which a compressed gas is blown and the preform is rotated by 180 between the preform mold and the finishing mould. Preform preparation is achieved by introducing a glass gob into the mold through an upper aperture; inserting a blowing sleeve into the glass gob, the end of the sleeve extending beyond the shoulders of the outline of the preform of the bottle, the sleeve being closed by a plunger element slidable within its interior; opening the cavity of the sleeve to disengage the plunger element; and blowing air through the sleeve, wherein the final finishing step is achieved in an open preform mold, the volume of the cavity of the finishing mold being greater than the volume of the cavity of the preform mold by 5-20%.

A muffle for a glass tube forming process includes an inlet end coupled to a bowl, an outlet end having an inner dimension larger than an inner dimension of the inlet end, and a sidewall extending from inlet end to the outlet end. A radial distance from a center axis of the muffle to an inner surface of the sidewall increases from the inlet end to the outlet end and the sidewall is substantially free of abrupt changes in the radial distance that produce instability regions within the muffle. The muffle includes a channel between an outer surface of a portion of the sidewall and an insulating layer disposed about the sidewall, the channel being operable to pass a heat transfer fluid into thermal communication with the sidewall to provide cooling to the muffle. Glass forming systems including the muffle and glass tube forming processes are also disclosed.

Device for forming a glass article, including a forming mold for receiving a glass blank, and a gas injection device with a blowing head intended to be received in the mouth of the blank, the gas injection device including a pressurized gas inlet, a first injection channel connecting the pressurized gas inlet to at least one outlet port opening into the inside cavity, through a first control solenoid valve, with a first pressure sensor and a first temperature sensor, a vent channel connecting the inside cavity to the outside air, the vent channel being equipped with a second pressure sensor and a second temperature sensor, an electro-pneumatic control unit being configured to control the first control solenoid valve according to the pressure measurements and temperature measurements.

The method for manufacturing a hollow glass article comprises the following steps: introducing a blank (38) of the article into a finishing mold (26), and forming the article in the finishing mold (26), by injecting at least one gas and a forming pressure inside the blank (38) of the article. During formation of the article in the finishing mold (26), at least one gas injection point (54A) is displaced for directing the gas towards at least one predefined area of the blank (38), the gas being injected at least at a finishing pressure in order to form a specific inner glass distribution of the article.

The invention provides a method of making a vessel having a sculptural interior, comprising attaching a textile core to the air inlet port of an I.S. machine, inserting a gob of molten glass into a mold to surround the textile core, applying compressed air to press the molten glass around the textile core, applying compressed air to inflate the textile core creating the bottle, allowing the bottle to cool sufficiently to withdraw the core from the bottle, and withdrawing the textile core from the bottle.