A method for welding at least two parts including a thermoplastic material and having respective surfaces to be welded, including: inserting an insert between the surfaces to be welded of the two parts; generating heat via the insert; wherein the insert moves in relation to the parts to be welded in a welding direction. Also, an installation adapted for implementation of this method.

A sensorless temperature sensing and control system and method uses electrical voltage and current feedback signals to monitor and control the temperature of heating elements used in a heat sealing process wherein sensors are not physically connected to a heat seal bar during the heat sealing process. After calibration of a heat seal bar using a sensor, voltage and current feedback signals are processed by a programmable logic controller (PLC) to calculate the real-time electrical resistance of each heating element. Data and electrical resistance is used to calculate real-time temperature of the heat seal bar during heating.

Method, and apparatus, for applying a heat-activated double-sided adhesive tape (10) to a support (20) by: activate by heating the double-sided adhesive tape (10) with laser light from at least two different laser light emitters (30), salid emitters each compörising an optical collimator (31) adapted to project a cylindrical light beam (33), and bringing into mutual contact said activated double-sided adhesive tape (10) with said support (20) in a contact zone so they join.

A process for packaging a product arranged on a support comprising unrolling a film, moving the film to a packaging assembly defining at its inside a packaging chamber, progressively moving a number of supports inside the packaging chamber of the packaging assembly, closing the packaging chamber with the film sheets held above the respective support, optionally causing one or both of: a gas withdrawal from the hermetically closed packaging chamber and gas injection of a gas mixture of controlled composition, heat sealing the film to said support, wherein the heat sealing uses one or more heaters having heating surfaces which are heated for discrete and short time periods only. An apparatus for performing the above process is also disclosed.

A process for packaging a product arranged on a support comprising unrolling a film, moving the film to a packaging assembly defining at its inside a packaging chamber, progressively moving a number of supports inside the packaging chamber of the packaging assembly, closing the packaging chamber with the film sheets held above the respective support, optionally causing one or both of: a gas withdrawal from the hermetically closed packaging chamber and gas injection of a gas mixture of controlled composition, heat sealing the film to said support, wherein the heat sealing uses one or more heaters having heating surfaces which are heated for discrete and short time periods only. An apparatus for performing the above process is also disclosed.

A fill packaging machine includes a vertical sealing means for folding a packaging film at its central part and continuously forming a vertical sealed portion at its side edge part to shape into a cylinder, and a lateral sealing means for forming lateral sealed portions in a direction perpendicular to the longitudinal direction of the packaging film. An easy separable sealed portion is continuously formed in the side edge part of the packaging film by the first vertical sealed portion forming section, and a vertical sealed portion having a partial non-sealed portion of a bottle mouth type is formed on the easy separable sealed portion by the second vertical sealed portion forming section. The first vertical sealed portion forming section is a pair of heat sealing rolls or heat sealing plates, a surface of at least one of which is made from an elastic material softer than a metal.

A method and apparatus for manufacturing a welded resin article which includes (a) bringing first and second resin members to come into contact with each other; (b) applying laser light to the first and second resin members while moving the laser light relative to the first and second resin members; (c1) obtaining a value corresponding to the intensity of infrared light from a plurality of locations on a surface; (d) successively calculating, as a section average, the average of a predetermined number of successive values, among those obtained from the plurality of locations corresponding to the intensity of the infrared light; (e) a step of successively calculating a deviation judgment value; and (f) a step of successively judging whether or not the deviation judgment value falls within a predetermined judgment threshold range.

The invention relates to a method and to an apparatus for producing a plug-through connection arrangement of a plurality of electrical cables (1a-1d) and/or fluid-conducting hoses, having a sheathing (2) consisting of a plastic, which extend, arranged adjacently spaced apart from each other, through associated openings (3a-3d) of a plastic component (4), comprising the following steps: providing (A) the plastic part (4) with the pre-produced plurality of openings (3a-3d), installing (B) the electrical cables (1a-1d) and/or fluid-conducting hoses through the associated openings (3a-3d), such that the outer wall of the sheathing (2), which consists of plastic, comes into contact with the inner wall of the respective openings (3a-3d) of the plastic component (4), thermal welding (C) of the electrical cables (1a-1d) and/or fluid-conducting hoses to the plastic component (4) in the region of the respective opening (3a-3d), in order to produce an integrally sealing component bond, wherein at least two laser beam units (5a, 5b), positioned opposite each other, are aligned to an associated initial connection point, after which the oppositely positioned laser beam units (5a, 5b) are activated and caused to undergo a linear relative movement crosswise to the orientation of the openings (3a-3d), in order to create the integral bond by surface melting of the sheathing (2) together with the plastic component (4).

A pipe joining material for connecting pipes and fittings and a method of making a pipe joining material are provided. The pipe joining material may include a thermoplastic material such as polyvinyl chloride (PVC) and/or chlorinated polyvinyl chloride (CPVC) and a bonding agent for the thermoplastic material.

The invention first relates to a method for welding at least two parts comprising a thermoplastic material and having respective surfaces to be welded, comprising: inserting an insert between the surfaces to be welded of the two parts; generating heat via said insert; wherein the insert moves in relation to the parts to be welded in a welding direction. The invention also relates to an installation adapted for implementation of this method.