Abstract: Method and apparatus for cooling molded plastic pieces preferably includes a take out structure/step configured to hold the plurality of plastic parts oriented such that closed ends thereof are disposed toward an inside of the take out structure and open ends thereof are disposed toward an outside of the take out structure. A movement structure/step is configured to cause relative movement between the take out structure and at least one of a first cooling station and a second cooling station. The first cooling station includes a first cooling structure/step configured to provide a cooling fluid to an inside of the plurality of plastic parts through the open ends thereof. The second cooling station includes a second cooling structure/step configured to provide a cooling fluid to an inside of the plurality of plastic parts through the open ends thereof.

Abstract: Two substrates are simultaneously produced by an injection molding apparatus, and the injection-molded substrates are alternately arranged and cooled by a cooling apparatus. The cooling apparatus has a feed screw mechanism for feeding the alternately arranged substrates in one direction while cooling air is being applied to the substrates. An information recording medium which includes a substrate is manufactured on a production line having a single injection molding apparatus for simultaneously injection-molding two substrates and four dye solution coating machines for forming a dye recording layer for recording information on each of the substrates.

Abstract: A cooling tube assembly for operating on a malleable molded plastic part. The cooling tube assembly comprising a porous tube/insert having a profiled inner conditioning surface, and a vacuum structure configured to cooperate with the porous tube. In use, the vacuum develops a reduced pressure adjacent the inner conditioning surface to cause an outer surface of the malleable molded plastic part, locatable within the cooling tube assembly, to contact the inner conditioning surface of the porous insert so as to allow a substantial portion of the outer surface of the malleable part, upon cooling, to attain a profile substantially corresponding to the profile of the inner conditioning surface.

Abstract: A method for removing supports from a three-dimensional objected formed by selective deposition modeling. The three-dimensional object is formed from a curable phase change material and the supports are formed from a non-curable phase change material. The curable phase change material contains between about 5% to about 25% of a non-reactive wax in order to achieve the desired phase change characteristics of the material. When removing the supports with heat, discoloration undesirably occurs in the three-dimensional object as the non-reactive wax migrates within the object. The method prevents wax migration by cooling the object slowly past the freezing point of the build material such that a temperature differential no greater than about 5° C. is present within the object. With the preferred build material having a freezing point of about 49.5° C., this is achieved by lowering the temperature between about 62° C. to about 52° C.

Abstract: A method of making a painted part out of molded thermoplastic material, the method comprising the steps consisting in: making the part to be painted by a method of molding thermoplastic material in the cavity of a mold; allowing the part made in this way to cool at least on the surface, cooling being accompanied by shrinkage, and being performed by opening the mold that was used to make the part that is to be painted; and injecting paint around the part in a cavity of a mold having the same shape as the mold cavity that was used for molding the thermoplastic material.

Abstract: A method of treating a disc plate. has the following operations of: molding a mold disc plate through an injection molding; and spinning the mold disc plate at a high spin speed. The spinning operation has at least one of the following two sub-operations of: reducing a warp of the mold disc plate with a centrifugal force caused during the spinning operation, and reducing a temperature of the mold disc plate during the spinning operation. Moreover, an apparatus of treating a disc plate has: a conveyer for conveying a mold disc plate obtained through an injection molding; a disc bench for receiving the mold disc plate conveyed with the conveyer; and a spin driver for spinning the disc bench when a temperature of the mold disc plate is higher than 90° C., to thereby spin the mold disc plate.

Abstract: The present invention provides a process and apparatus for preserving the potency of a tableted heat sensitive ingredient. The process includes the steps of forming the ingredient into a tablet and cooling the tablet for a sufficient time and at a sufficiently low temperature to decrease the heat degradation of the ingredient. The process may be carried out in any number of tablet cooling apparatus, including a conduit forming a passageway for receiving tablets from the tablet press. A coolant inlet is connected to the conduit for supplying coolant into the passageway and into contact with the tablets.

Abstract: A method for reliably forming golf balls using solid cores is described. The method includes using a freezing apparatus to freeze a core. The core may be frozen at any desired temperature, for any desired duration. The time and duration may be chosen in order to achieve a desired size or effective modulus. When a core is sufficiently frozen, it may be placed in a molding apparatus. In order to minimize condensation or frost that may form on a frozen core, a dehumidifying method or apparatus may be included and a layer is preferably molded around the core soon after it is removed from the freezing apparatus.

Abstract: A process for making an optical film includes stretching a polyolefin film in a first direction and stretching the polyolefin film in a second direction different than the first direction forming a biaxially stretched polyolefin film. At least a portion of the stretching of the polyolefin film in the second direction occurs simultaneous with the stretching of the polyolefin film in the first direction. The biaxially stretched polyolefin film has a length and a width and substantially non-absorbing and non-scattering for at least one polarization state of visible light. The biaxially stretched polyolefin film has x, y, and z orthogonal indices of refraction where at least two of the orthogonal indices of refraction are not equal, an in-plane retardance being 100 nm or less and an out-of-plane retardance being 50 nm or greater.

Abstract: Post mold cooling apparatus and method having transverse movement preferably includes structure and/or steps for cooling a plurality of plastic articles molded on a row of mold cores. A post mold cooling device is provided having (i) a first row of cooling tubes configured to hold a first plurality of the molded plastic articles, and (ii) a second row of cooling tubes configured to hold a second plurality of the molded plastic articles. A cooling station is disposed adjacent the cooling device and is configured to provide a cooling fluid to an interior of both the first and second pluralities of molded articles inside the respective first and second rows of cooling tubes.

Abstract: A method of stretching films in which all or a portion of the width of the film is cooled during or just after stretching so as to improve the uniformity of the film. The includes stretching a polymeric film in a tenter that grasps the film with a plurality of clips along the opposing edges of the film and propels the clips to thereby stretch the film. The tenter includes driven clips and idler clips, with at least one idler clip between respective pairs of driven clips. The cooling is done so as to improve the uniformity of the clip spacing relative to the spacing obtained at otherwise identical process conditions without such cooling.

Abstract: A cooling system for removing heat from the layers of a three-dimensional object built in a layerwise manner from a build material in a solid freeform fabrication apparatus. The cooling system provides an air duct that delivers a uniform sheet of air flow over the layers of the three-dimensional object while it is built. It is emphasized that this abstract is provided to comply with the rules requiring an abstract that will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).

Abstract: Provided is a method for manufacturing a papermaking belt structure using tapes made of a solid thermoplastic resin surrounding a fibrous matrix. The method calls for applying a layer of CD oriented tapes to a mandrel surface, then applying a layer of MD oriented tapes over the CD layer, applying pressure and heat to the mandrel containing the CD and MD layers so to melt the resin and entirely bond/encapsulate the fibrous matrix. The belt structure thus obtained may thereafter be grooved, drilled or other processed as desired. Additionally, the above method can be reversed as to the MD/CD order of layering. Also, a layer entirely of resin can be applied, preferably prior to, but also after or in between the MD/CD layers. Also, rubber can comprise one or more layers.

Abstract: A method is described for producing a pipe end socket (3) made of thermoplastic material with a sealing ring (5) which engages in a form-fitting manner on the inside of the socket in a circumferential bead (4) and which comprises a sealing part (6) and a supporting part (7), with the sealing ring (5) being introduced into a preformed bead region and is then tightly held in a form-fitting manner in the circumferential bead (4) by a final forming of the preformed bead region. In order to provide advantageous process conditions it is proposed that the pipe end socket (3) with the circumferential bead (4) is preformed at a deformation temperature corresponding at least to the softening temperature with an overdimension which allows an insertion of the sealing ring (5), and after the cooling below the softening temperature and after inserting the sealing ring (5) said pipe end socket with the circumferential bead is pressed into the final shape by taking into account a cooling-induced shrinkage.

Abstract: A method of producing contoured vehicle floor mats having integrally formed nibs. The sheet is formed by a nib forming roll in an extrusion roll stack having a plurality of indentions. The nibbed sheet is placed onto the thermoform mold with the nibs directed away from the mold. The sheet is heated to a plastic state and stretched over the mold to form a contoured mat shaped to vehicle within a vehicle compartment, trunk or cargo area. The nibs on the underside of the mat contacts the floor covering and prevents the mats from sliding on the interior surface of the vehicle.

Abstract: There is provided an arrangement of a mold including a mold base (1), a cavity block (2) provided within the mold base (1), a heat insulating layer (5) provided between the mold base (1) and the cavity block (2), and a system of a flow passage (A) through which a heating medium and a cooling medium are alternately and repeatedly supplied, wherein a space is provided at a contact portion between the cavity block (2) and the mold base (1) based on anticipation of a thermal expansion of the cavity block (2). Further, the cavity block (2) may be arranged to have inlet and outlet slots communicating with the channel (A), and the inlet and outlet slots may be attached with conduits thermally insulated from the mold base (1).

Abstract: The present invention is directed to a method of making a golf ball including the steps of cooling a golf ball subassembly such that the golf ball subassembly undergoes a volumetric reduction, and applying a cover layer over the volumetrically reduced golf ball subassembly. The method can further include a three-step curing process after applying the cover layer. The three-steps include maintaining mold halves containing the covered subassembly at a first temperature, heating the mold halves to a second temperature, then maintaining the mold halves at a third temperature. Also, the method can include cooling the cover materials in a mixer so that higher levels of catalyst can be used.

Abstract: A method for removing supports from a three-dimensional object formed by solid freeform fabrication. The three-dimensional object and support structure both contain a phase change component in order to achieve the desired phase change characteristics needed for dispensing the material. The method prevents the phase change material within the three-dimensional object from migrating within the object during post processing to remove the support structure.

Abstract: A method and apparatus for forming laminate composite structures. At least two laminae, each containing electrically conductive reinforcing fibers, are placed upon each other in contacting relationship to form a generally layered structure. The layered structure may be subjected to heat to conductively transfer heat through the layered structure and thereby improve the surface contact between two laminae. The layered structure is volumetrically heated by inductively transferring energy to the electrically conductive reinforcing fibers. The heated, layered structure is consolidated, such as by applying pressure and reducing the temperature of the layered structure. The consolidated structure is then quenched by rapidly cooling the consolidated structure in a directionally controlled manner about a midplane thereof.

Abstract: A method for manufacturing an optical element, such as a plastic lens or similar, by molding. The manufacturing method includes the steps of molding the plastic lens under a prescribed molding temperature higher than a glass transition level of the plastic material used to from the optical element. The manufacturing method also includes the step of gradually cooling the optical element by at least 5° C. with a speed which decreases by approximately 3° C. per minute. The optical element formed from a plastic material includes a substantially rectangular shape having a width, a height, and a thickness, wherein the width is greater than the height and the thickness is measured in an optical axis direction. The optical element also includes a refractive index distribution of approximately 2×10?5 at a central half section of the height. The optical element may be defined by the manufacturing method having the molding step and the gradual cooling step.

Abstract: In a method of cooling a tank molded from thermoplastic plastic material, a molded tank is received from a metallic die assembly at a temperature somewhat lower than a melting point of the plastic material, the molded tank is retained in a jig frame, and cooling water is sprayed onto an external surface of the molded tank. Preferably, the method further comprises the step of blowing cooling air into the tank substantially at the same time as spraying cooling liquid onto an external surface of the molded tank. Thus, the molded plastic tank can be removed from the metallic die assembly at a relatively high temperature, and the use efficiency of the metallic die assembly can be improved. Also, because the tank is not subjected to any pressure or buoyant force, it is prevented from undesirably distorting. In particular, by blowing cooling air into the tank, the tank can be cooled even more quickly.

Abstract: A method for producing a multilayer molded article in which an skin material having nap on the outer surface thereof is integrally molded with a substrate of a synthetic resin, using a mold comprising a pair of male and female mold halves. In this method, after the fabric skin material and the molten resin are clamped in the mold and primary cooling is carried out, the mold is opened halfway to form a predetermined gap between the mold halves, and the molten synthetic resin undergoes secondary cooling and hardens while the mold is held in the half-open state. In the present invention, the time period for the operation to open the mold halfway is set at one second or less. By limiting the half-opening operation time period to the short period of one second or less, recovery of the nap is reliably achieved without the nap tending to stay flattened.

Abstract: A process for production of a monolithic article from a web of fibres of oriented polypropylene polymer, comprising the steps of subjecting the web to elevated temperature and pressure sufficient to melt a proportion of the polymer and compact it, and then cooling the compacted web, wherein an accelerated rate of cooling is employed down to 100° C. The process is of particular benefit when the weight average molecular weight (Mw) of the fibres is 250,000 or below. The resultant articles have good stiffness and strength, yet with reasonable ductility. Similar articles cooled slowly are brittle.

Abstract: In a method of manufacturing a rubber crawler through a first vulcanization step and a second vulcanization step using an upper mold, a middle mold and a lower mold, at least the middle mold is heated at each vulcanization step, and a vulcanizing circumferential length at the first vulcanization step is made longer than that at the second vulcanization step, and the second vulcanization step is carried out at a state that each end portion of the crawler part formed at the first vulcanization step is positioned by at least one pitch rate in each mold at the second vulcanization step and the distance between the upper and lower molds is made larger than that in the first vulcanization step.

Abstract: A method of forming a stretch composite with one or more elastomeric members disposed on at least one region of an extensible substrate to provide stretch properties to a targeted region of the substrate is disclosed. The composite has been incrementally stretched to at least partially break up the structure of the substrate in order to reduce its resistance to stretch. The stretch composites are useful for disposable and durable articles, such as disposable absorbent articles including diapers, pull-on diapers, training pants, incontinence briefs, catamenial garments, baby bibs, and the like, and durable articles like garments including sportswear, outerwear and the like. Methods of making such stretch composites are also disclosed.

Abstract: The present invention provides a process for heat treatment of non-woven composite elastic material including a non-woven elastic layer; a non-woven gatherable layer. The process includes stretching the material, heating the material and cooling the material. The material has a softer more cloth-like feel.

Abstract: Apparatus and method for the production of expandable plastics granulate (C). A plastics melt (A′) is impregnated by a fluid blowing agent (B), which is, at an elevated pressure within a predetermined pressure range, only partly soluble in the melt. The method comprises the following steps: 1. dispersion of the blowing agent in the melt, 2. retaining of the mixture within a predetermined pressure range for a predetermined retention time, 3. cooling of the melt impregnated by the blowing agent to a temperature which is several degrees Celsius above the solidification temperature of the melt, and 4. granulating the cooled mixture.

Abstract: An apparatus and method for providing targeted cooling to a pre-molded article, such as a preform. A cooling pin is inserted into the preform such that it makes contact with targeted area, such as the mold gate area. This permits conductive cooling of the targeted area. The apparatus and method are particularly suited to post-mold cooling in conjunction with a robotic take-out plate.

Abstract: It is to provide a method of manufacturing a rubber crawler which enhances a degree of freedom in the handling in a vulcanization-shaping of a crawler part and largely improves vulcanization shapability and operability and facilitates an arrangement of an auxiliary device or the like.

Abstract: A method of embossing a sheet material includes: heating at least a portion of the sheet directly or indirectly with radiant energy from a radiant energy source; pressing a tool against the heated portion of the sheet, thereby patterning a surface of the sheet; and separating the sheet and the tool. The radiant energy may travel through a solid material that is relatively transparent to radiation, on its way to being absorbed by a relatively-absorptive material. The relatively-transparent material may be an unheated portion of the sheet, and the relatively-absorptive material may be either the tool or the heated portion of the sheet. Alternatively, the relatively-transparent material may be the tool, and the relatively-absorptive material may be all or part of the sheet. The method may be performed as one or more roll-to-roll operations.

Abstract: A method and apparatus for camouflaging hunting equipment utilizes one or more pieces of thermoplastic shrink-wrap provided with a camouflage pattern. Each piece of shrink-wrap is positioned around a portion of an item to be camouflaged and is then heat-shrunk to constrict the piece of shrink-wrap around the portion of the item. Once shrunken by applying heat, excess portions of the shrink-wrap can be easily trimmed away, thereby provided a professional-looking camouflage finish. When desired, the camouflage shrink-wrap can easily be removed from the item by tearing a portion of the shrink-wrap and peeling the rest away without damaging the item's original finish.

Abstract: A method for removing supports from a three-dimensional objected formed by selective deposition modeling. The three-dimensional object is formed from a curable phase change material and the supports are formed from a non-curable phase change material. The curable phase change material contains between about 5% to about 25% of a non-reactive wax in order to achieve the desired phase change characteristics of the material. When removing the supports with heat, discoloration undesirably occurs in the three-dimensional object as the non-reactive wax migrates within the object. The method prevents wax migration by cooling the object slowly past the freezing point of the build material such that a temperature differential no greater than about 5° C. is present within the object. With the preferred build material having a freezing point of about 49.5° C., this is achieved by lowering the temperature between about 62° C. to about 52° C.

Abstract: A process for producing microstructured tool insert for injection molding a part, the part being fabricated of a synthetic material, a metal or a ceramic material and including an arrangement of microstructures which are formed on an outer surface of the part and have two different predetermined depths.

Abstract: A method of treating a flexible multi-layer member exhibiting a glass transition temperature and including a surface layer, the method composed of: moving the member through a member path including: a contact zone defined by contact of the member with an arcuate surface including a curved contact zone region; a pre-contact member path before the contact zone; and a post-contact member path after the contact zone; heating sequentially each portion of the surface layer such that each of the heated surface layer portions has a temperature above the glass transition temperature while in the curved contact zone region; and cooling sequentially each of the heated surface layer portions while in the contact zone such that the temperature of each of the heated surface layer portions falls to below the glass transition temperature prior to each of the heated surface layer portions exiting the curved contact zone region, thereby defining a cooling region, wherein the heating is accomplished in a heating region encompas

Abstract: A device (1) for cooling and/or thermal conditioning of hot preforms or parisons (6), in particular of parisons for the production of blow-moulded bottles made of plastic material, limits and/or reduces the deformations of said parisons during cooling by containing the transverse deformations of the end close to the opening (8) of the parison. The device is provided with a tubular portion of prolongation which wraps totally around the parison that rests on its internal surface with one of its sections (9). Described herein is the corresponding method for cooling the parison (6).

Abstract: A method and apparatus for repairing or refurbishing thermoplastic drums, by which a damaged drum, or at least a damaged portion thereof, is heated until it reaches a softened state and is then drawn over a template, or mold, having the substantially the same shape and size of an undamaged drum. The drum is allowed to cool sufficiently to return to its hardened state, whereby it substantially assumes the shape of the template. The refurbished drum is then removed from the template and is essentially ready to be used again.

Abstract: Heat treatment is performed on preforms placed in an enclosure accompanied by sweeping with an inert gas under reduced pressure, and with a gaseous effluent being exhausted continuously via a first effluent outlet connected to an effluent exhaust circuit. At the end of the heat treatment, the first gaseous effluent outlet is closed so as to isolate the effluent exhaust circuit from the enclosure, sweeping of the enclosure with the inert gas is interrupted, and the heat-treated preforms are left in the enclosure and are subjected to densification by admitting a reagent gas into the enclosure via at least one reagent gas admission duct opening out into the enclosure, with gaseous effluent being exhausted via a second effluent outlet separate from the first, said second outlet being closed during the heat treatment step. Advantageously, metal, in particular sodium, contained in the gaseous effluent exhausted from the enclosure during the heat treatment step is neutralized.

Abstract: An improved pipe belling process is shown which features a mandrel having a specially designed backup or forming collar. The backup collar has an exposed lip portion which forms a complimentary angle with the outer sloped surface of the gasket which it abuts. The complimentary angles of the backup collar and gasket form a wedge shaped contact area which serves to retain the gasket in its initial circumferential position on the working surface of the mandrel as the heated pipe is forced over the mandrel and gasket.

Abstract: Method and apparatus for cooling molded plastic pieces preferably includes a take out structure/step configured to hold the plurality of plastic parts oriented such that closed ends thereof are disposed toward an inside of the take out structure and open ends thereof are disposed toward an outside of the take out structure. A movement structure/step is configured to cause relative movement between the take out structure and at least one of a first cooling station and a second cooling station. The first cooling station includes a first cooling structure/step configured to provide a cooling fluid to an inside of the plurality of plastic parts through the open ends thereof. The second cooling station includes a second cooling structure/step configured to provide a cooling fluid to an inside of the plurality of plastic parts through the open ends thereof.

Abstract: Post mold cooling apparatus and method having transverse movement preferably includes structure and/or steps for cooling a plurality of plastic articles molded on a row of mold cores. A post mold cooling device is provided having (i) a first row of cooling tubes configured to hold a first plurality of the molded plastic articles, and (ii) a second row of cooling tubes configured to hold a second plurality of the molded plastic articles. A cooling station is disposed adjacent the cooling device and is configured to provide a cooling fluid to an interior of both the first and second pluralities of molded articles inside the respective first and second rows of cooling tubes.

Abstract: A process for the production of tablet-shaped granular material from a melt, in which (i) a melt is prepared, (ii) the prepared melt is shaped to droplets, (iii) the droplets are deposited on a cooling surface, and (iv) the deposited droplets solidify to give the granular material, wherein the melt comprises an alcohol, and the melt has a melting point of 30° C. or above.

Abstract: In a method for the internal cooling of a rotating object (4), liquid gas from at least one inlet channel (61) in a fixed object (5) is pressed into a ring-shaped groove (62) located between the fixed object (5) and the rotating object (4). From the ring-shaped groove (62) the liquid gas is pressed into at least one channel (63, 64.1, 64.2) in the rotating object (4) and brought to a part to be cooled (15). The liquid gas, upon contact with the part, evaporates and expands while absorbing heat, thereby cooling the part. The area surrounding the part to be cooled (15) may be designed as an expansion chamber (65). The method can be used to cool molded parts in injection molding machines with rotating molds (1), thereby achieving shorter cycle times.

Abstract: The present invention provides a process and apparatus for preserving the potency of a tableted heat sensitive ingredient. The process includes the steps of forming the ingredient into a tablet and cooling the tablet for a sufficient time and at a sufficiently low temperature to decrease the heat degradation of the ingredient. The process may be carried out in any number of tablet cooling apparatus, including a conduit forming a passageway for receiving tablets from the tablet press. A coolant inlet is connected to the conduit for supplying coolant into the passageway and into contact with the tablets.

Abstract: A decurl apparatus includes a heating device to heat an image recording carrier web at a constant temperature, which exceeds the glass transition temperature of a support for a constant time period; and a cooling device for subsequent cooling of the image recording carrier web to a temperature equal to or lower than the glass transition temperature, while the image recording carrier web maintains a predetermined shape. The heating device includes an induction-heated heating roller and holding rollers arranged at arbitrary angular positions with respect to the outer circumference of the heating roller. As a result, the image recording carrier web is reliably decurled by a simple construction without being influenced by a transfer velocity or the like.

Abstract: A process for modifying a uniformity of a tire comprising a radial carcass ply of rubberized organic fiber cords is modifications of radial force variation (RFV) and conicity force (COF), which is carried out by dividing RFV- or COF-rejected tire into two portions and applying different thermal hysteresis to these portions under specified conditions.

Abstract: A method is provided for making ligneous material boards into an endless board strand with a continuously operating press. The press includes two flexible endless steel belts which take the press material between them and carry it through the press. The steel belts thrust with friction-reducing elements against heated press plates of the press table and press ram and a cooling system that follows. The cooling system is configured as a double-belt holding apparatus with an applicable holding pressure up to a maximum of 0 to 0.05 N/mm2. A diagonal sawing apparatus, which is disposed directly behind the continuously operating press and ahead of the cooling system, divides the board strand into single boards. Several rows of coolant spray nozzles disposed on the backs of the holding belts making contact with the single boards.

Abstract: The present invention discloses an apparatus and method for quenching thin walled metal hollow casings (6) manufactured by blow moulding. The apparatus comprises a moulding tool (1) defining a slot or aperture (21) and a delivery system for applying a coolant to the slot or aperture (21) of the moulding tool (1). The invention also discloses a method of applying a coolant to the external surface of a blow moulded casing (6) by applying the coolant onto an external surface of the casing (6) after the casing (6) has been formed against a tool (1) which includes at least one slot or aperture (21).

Abstract: The present invention relates to an improved method and apparatus for injection molding and cooling molded articles such as preforms so as to avoid crystallinity. The apparatus and method make use of a take-off plate for removing articles from a mold, which plate may include heat transfer devices for cooling exterior surfaces of the molded articles or preforms, and a system for cooling in a controlled manner interior surfaces of the molded articles or preforms.

Abstract: A method of making a painted part out of molded thermoplastic material, the method including making the part to be painted by a method of molding thermoplastic material in the cavity of a mold; allowing the part made in this way to cool at least on the surface, cooling being accompanied by shrinkage, and being performed by opening the mold that was used to make the part that is to be painted; and injecting paint around the part in a cavity of a mold having the same shape as the mold cavity that was used for molding the thermoplastic material.

Abstract: The invention relates to a method and an arrangement for cooling an extruded hollow product. According to the invention, the extruder (1) is provided with means for sucking air through the pipe (2). The air to be sucked is thus in contact with the inner surface of the pipe (2), cooling the pipe from the inside. Therefore the cooling of the pipe (2) can be realized in an efficient and simple manner. By arranging the sucking to occur from the middle of the conical extruder (1), no weld line will be formed in the extruded product, and the extruder (1) can be cooled effectively from the inside. According to the invention, the heat contained by the air that has been sucked through the pipe (2) can also be utilized.