Abstract: A sprue bushing includes a head, and a main body. The main body is connected to an end of the head. The main body defines at least one lateral channel. The at least one lateral channel extends through a sidewall of the main body. The sprue bushing defines a sprue and at least two longitudinal channels. The sprue extends through the head and the main body along a center axis of the sprue bushing. The at least two longitudinal channels extend through the head into the main body. One of the at least one lateral channel communicates with two of the at least two longitudinal channels.

Abstract: An injection mold for forming a light guide plate including a first block, a second block configured to face the first block, a forming portion included between the first and second blocks facing each other and having a shape of the light guide plate, an injection portion formed at the first block and configured to receive injected resin for forming the light guide plate, and a gate portion configured to guide the injected resin from the injection portion to the forming portion. Further, a width of a first end portion of the gate portion that is connected to the forming portion is 50%-80% of a width of the forming portion.

Abstract: A cavity member for a mold cavity structure for the production of hollow body moldings, wherein the cavity member has a substantially hollow-cylindrical element, wherein a cooling passage is provided at the outside of the hollow-cylindrical element. To provide a cavity member which is simple to manufacture and which permits more effective cooling of the cavity member it is proposed in accordance with the invention that there are provided one or more guide elements for forming the cooling passage, wherein the guide elements and the hollow-cylindrical element are in the form of separate parts.

Abstract: A bottom insert for a mold cavity for the production of moldings of plastic material. The mold cavity has a main body with a hot side which has a recess for receiving molten plastic material under pressure and a cold side having a recess, the inside contour of which is intended to come into contact with the molding to be produced and to shape the outside contour thereof. A gate (17) is provided that connects the recess of the hot side to the recess of the cold side and is intended to introduce molten plastic material from the hot side into the cold side. In accordance with the invention there is provided a device for thermal insulation within the bottom insert between the hot side and the cold side of the bottom insert to permit more rapid cooling of the cold side by restricting heat flow from the hot side.

Abstract: A mold heating/cooling structure for a mold configured with a die base and an insert, comprising: a heat insulating layer, disposed surrounding a die impression of the die base for insulating the heat conduction between the die base and the insert; a magnetic powder layer, disposed against the heat insulating layer; a coil, being disposed on the magnetic powder layer in a manner that it is circling from the outside in toward the center of the magnetic powder layer; and a cooling plate, configured with a plurality of second fluid channels provided fro a fluid to flow therein. With the aforesaid structure, the insert can be heated directly by the coil the it is subject to a high-frequency current, and the heated coil as well as the insert can be cool down with high efficiency as soon as the fluid is fed into the second fluid channels.

Abstract: Tools of plastics processing machines are cooled over their surface and/or at particular points as soon as compound supply is finished. Heat is thus suitably withdrawn from the shaped compound, ensuring the fastest possible cooling and shortening cycle times. The invention relates to a closed, coolant-filled cooling system for tools of plastics processing machines having at least one compressor, a supply pipe, a tool region to be cooled and a discharge pipe, the supply pipe being connected to the outlet of the compressor and the discharge pipe being connected to the inlet of the compressor, while at least one open end of the supply pipe plunges into at least one bore arranged in the tool region to be cooled, and an open end of the discharge pipe is sealed to this bore. The supply pipe and the discharge pipe may be combined in a coaxial pipe with the supply pipe arranged in the centre and the discharge pipe enveloping the supply pipe.

Abstract: The present invention relates to device and method for injection molding a product having a hydrophobic pattern, which permits mass production of the product having a hydrophobic surface and clear formation of the hydrophobic pattern on the product. The method includes the steps of heating a mold having a stamper with a hydrophobic pattern formed thereon mounted thereto, bringing the mold into close contact with other molds for enclosing an inside of the molds, injecting a predetermined resin material into the inside of the molds, and cooling down the molds, and separating the molds.

Abstract: An injection molding apparatus and method are provided. The method includes a molded cavity coupled to a resin injection apparatus which injects molten resin under pressure with a gas such that the resin foams within the mold cavity. An electrical heater is in contact with a first cavity surface, and a cooling medium cools the mold. The resin may include metallic flakes.

Abstract: A gas-assisted mold surface heating system is disclosed, which comprise: an air supply, for providing air with a flow rate larger than 300 L/min; a heater, for heating air to a temperature higher than 400° C.; a mold, configured with a mold cavity, an inlet and an outlet; and an air storage tank; wherein, the inlet is connected to the heater through a pipeline for allowing the air from the air supply to flow into the cavity after being heated by the heater and thus to be for heating up the surface of the mold cavity while the heated air is being enabled to flow out of the cavity through the outlet and into the air storage tank. With the aforesaid system, surface temperature of the mold cavity can be raised to a point higher than a glass transmission point in a short period of time.

Abstract: A mold assembly includes a mold moving half, at least one heat sink positioned on the mold moving half, and a plurality of heat pipes positioned on the mold fixed half and on the at least one heat sink. The at least one heat sink includes a plurality of parallel fins. The plurality of parallel fins is secured to the heat pipes with the heat pipes passing therethrough. The heat pipes are capable of moving together with the mold moving half.

Abstract: The present invention relates to a coaxial cooling/heating coil structure and a mold configured with the same, in which the coaxial cooling/heating coil is comprised of: a frame, configured with a cooling channel having an inlet, provided for a cooling water to flow therein, and an outlet, provided for discharging the cooling water therefrom; and a heat-conducting coil, disposed inside the cooling channel. The coaxial cooling/heating structure is fitted to a mold to be used for enhancing the preheating efficiency of the mold while improving the time required for cooling the mold.

Abstract: Contact lens molds and methods of producing soft cast-molded contact lens products are provided. The methods include placing a soft hydrophilic contact lens-forming composition in a cavity formed between a first mold member and a second mold member, subjecting the composition in the cavity to conditions effective to form a contact lens product from the composition, and repeating the placing and subjecting steps a plurality of times, thereby producing a plurality of soft contact lens products. At least the first mold members, and advantageously all of the first and second mold members, are injection-molded with a nucleated thermoplastic polyolefin resin having a melt flow rate in a range of 10 g/10 min to about 40 g/10 min.

Abstract: A neck block of a molding tool for the production of a hollow body preform by means of injection molding, wherein the neck block has a main body with a shaping surface which is adapted to the external contour of a neck portion of the hollow body preform to be produced and is provided to come into contact in the injection molding operation with the neck portion of the hollow body preform, wherein furthermore there is provided at least one cooling passage for a cooling fluid which at least portion-wise extends substantially parallel to the shaping surface. The neck block is further provided with an inlet and an outlet and an inlet passage and an outlet passage which connect the inlet and the outlet respectively to the cooling passage. The cooling passage is arranged closer to the shaping surface than the inlet and the outlet.

Abstract: An arrangement to assist in heat transfer through a mold for applications such as injection molding of plastics material including at least one closed chamber within the mold, the chamber being only partially filled with fluid and a remainder of the chamber being filled with substantially only vapor of the fluid within the chamber, at least a portion of the chamber being positioned to transmit heat from a targeted location of the mold into fluid within the chamber, and condensing means adapted by reason of heat exchange to effect condensation of vapor within the chamber, the mold being arranged in that the fluid, such as water, is arranged to be held in the chamber in such a way that the fluid will be distributed to reach or be held at different heights within the chamber.

Abstract: An injection molding apparatus includes a first mold supported on a first fixed plate, a second mold assembled to and disassembled from the first mold and forming a cavity for injection molding, a third mold installed so as to be assembled to and disassembled from the second mold, a guide portion guiding the assembly and disassembly of the first, second, and third molds, and a heating and cooling portion heating the second molding when injecting resin for forming a product into the cavity formed as the first and second molds are assembled to each other and cooling the second mod when curing the resin injected into the cavity.

Abstract: A mold assembly includes a mold moving half, at least one heat sink positioned on the mold moving half, and a plurality of heat pipes positioned on the mold fixed half and on the at least one heat sink. The at least one heat sink includes a plurality of parallel fins. The plurality of parallel fins is secured to the heat pipes with the heat pipes passing therethrough. The heat pipes are capable of moving together with the mold moving half.

Abstract: An injection molding tool is used to produce plastic parts such as toothbrush bodies or razor handles, for example. The tool has a stationary center mold block and a pair of outer mold blocks. The center mold block has two parallel opposed molding faces joined by two parallel opposed side faces extending perpendicular to the molding faces. The molding faces have parallel partial mold cavities formed therein and the outer mold blocks each are associated with one mold face of the center mold block and each have a molding face with parallel partial mold cavities formed therein which together with corresponding partial mold cavities of the associated mold face of the center mold block form complete mold cavities. Holders are indexed alongside the peripheral faces and around corners formed between the peripheral faces to hold and transport molded parts alongside the peripheral faces of the center mold block.

Abstract: A cooling device includes a housing and a die. The housing includes a top, a bottom, and a plurality of sidewalls interconnecting the bottom and the top. Two opposite sidewalls of the housing respectively defines a plurality of first inlets and outlets. The die is received in the housing and defines a plurality of first passages spanning opposite side surfaces, and the first passages are aligned with the first inlets and the outlets of the housing. A second passage is defined between the die and the sidewalls of the housing. The first and second passages are configured for conducting the cooling fluid to cool the die.

Abstract: The present invention relates to a cavity for a mould-cavity system for the production of hollow mouldings, where the cavity (1) has an element (2) which is in essence hollow and cylindrical, where a cooling channel has been provided at the outer side of the hollow cylindrical element (2). To provide a cavity which is easy to produce and which can increase the effectiveness of cooling of the cavity, the invention proposes provision of the cooling channel with a plurality of cooling-channel sections (3) extending substantially axially, and with at least one cooling-channel-connector section (4), where the cooling-channel-connector section (4) connects two of the cooling-channel sections (3) extending substantially axially.

Abstract: Disclosed is a mold for resin injection molding that can realize rapid heating or cooling. A resin injection molding mold includes a cavity mold and a core mold and is produced on a base plate by metal photofabrication. The cavity mold is provided with a cavity warm water circuit for allowing warm water for heating to flow and a cavity cold water circuit for allowing cold water for cooling to flow. The core mold is also provided with a core warm water circuit and a core cold water circuit. The core mold includes an air blowing passage for feeding warm air or cold air into a resin molding part and a suction passage (36) for sucking a gas within the resin molding part. The resin molding part side of the air blowing passage and the suction passage is formed of a low-density shaping part that has a low metallic powder sintered density and is permeable to gas.

Abstract: A cavity member for a mold cavity structure for the production of hollow body moldings, wherein the cavity member has a substantially hollow-cylindrical element, wherein a cooling passage is provided at the outside of the hollow-cylindrical element. To provide a cavity member which is simple to manufacture and which permits more effective cooling of the cavity member it is proposed in accordance with the invention that there are provided one or more guide elements for forming the cooling passage, wherein the guide elements and the hollow-cylindrical element are in the form of separate parts.

Abstract: A bottom insert for an injection mold, which insert is of a two-part configuration having a hot part which has a recess of the hot side and a cold part which has a recess of the cold side, wherein the cold part is arranged at least partially within the hot part so that the hot part at least portion-wise surrounds the cold part. The two parts of the bottom insert are preferably separable and the. hot part preferably has an opening in opposite relationship to the recess of the hot side for receiving the cold part. Further, the cold part and the hot part are desirably sealed off relative to each other, desirably by O-rings. In general, all surfaces which are provided for contact with the molding to be produced are arranged at the cold part. An insulating coating, an insulating membrane and/or a spacing element is desirably provided at the contact surface between the hot part and the cold part.

Abstract: An injection molding device for thermosetting molding materials includes a male mold portion, and a female mold portion. The male mold portion includes an injection aperture and a sprue communicated with the injection aperture. The female mold portion is mated with the male mold portion to define a parting face therebetween and includes a cold slug well and a main runner. The cold slug well is disposed at an opposite end of the sprue relative to the injection aperture and has at least two inner sidewalls perpendicular to each other. The main runner is defined in the parting face and commutating with the sprue. The refractive index of the products molded using the injection molding device may be obtained via directly measuring that of the cold slug after molding. Therefore, the time spent to measure the refractive index of the products is less than the conventional method.

Abstract: The present invention relates to a process for the production of coated mouldings, by injecting a moulding composition into an injection mould and cooling the composition to obtain a moulding, and altering the injection mould in such a way as to produce an intermediate space between a surface to be coated of the moulding and the inner surface of the injection mould, and using injection moulding to charge a reactive mixture to the resultant intermediate space, where the temperature of at least a portion of the injection mould is increased for the curing of the reactive mixture. The present invention moreover describes a system for the conduct of the process described above.

Abstract: An apparatus comprises a forming arrangement closable in a direction to form an object, said forming arrangement comprising at least two reciprocal movable elements along respective arched trajectories to disengage from said object, said arched trajectories having respective components parallel to said direction.

Abstract: Disclosed is a preferred mold design for producing plastic, molded preforms, which may be blow-molded into a container of a final, desired shape. A preferred mold includes a temperature control system for maintaining the preform mold at a desired temperature. The temperature control system can pass fluid through channels within the preform mold to cool plastic that is injected into the preform mold. In some arrangements, a mold comprises a neck finish mold, the neck finish mold configured to transfer heat away from the molding surface toward a channel conveying a working fluid. A heat transfer member may be at least partially positioned within the channel to transfer heat to the working fluid. In some embodiments, the mold comprises a high heat transfer material.

Abstract: An injection mold and an injection molding apparatus having a movable mold and a fixed mold. Each of the movable/fixed molds has bases, and a runner, a gate and a cavity are formed. The gate is composed of recesses made in mutually opposite end surfaces of sleeve-like heat insulators provided for the bases. Thereby, the gate is heat-insulated, and resin in the gate is prevented from cooling down during a pressure retention step. Thus, the resin keeps fluidity longer.

Abstract: The injection molding apparatus includes a cavity mold formed with a cavity surface for defining a cavity in which a molten injection material is injected, a core mold formed with a core surface for defining the cavity upon engagement with the cavity mold and installed to be movable forward and backward to open or close the cavity by guidance of a guide pin, an injection unit for injecting a material into the cavity during an injection process, and an injection controller for controlling a hydraulic cylinder to move the core mold forward or backward and the injection unit to inject the material into the cavity.

Abstract: An baffle plug comprising a base and a blade extending therefrom. The baffle plug is used in a bore to divide the bore into longitudinally extending passages and cause the liquid to flow serially back and forth through the bore. The blade may comprise various fluid directing structures providing for efficient fluid flow across the surfaces of the blade. The blade may also comprise one or more structures which create turbulent flow of the fluid flowing across the surface of the blade.

Abstract: Disclosed are a mold stack of a molding machine. A cavity insert is provided. The cavity insert comprises a body having: an internal surface defining, in use, at least a body portion of a molding cavity; an external surface defining, in use, at least a first portion of a cooling channel configured, in use, to direct a flow of coolant; and a mounting flange configured to support, in use, the body relative to a front face of a cavity plate, the mounting flange including a member configured to define, in use, a second portion of the cooling channel.

Abstract: An injection-moulding system for an injection-moulding machine including a clamping assembly, a temperature-adjusting system, and an ejector. The clamping assembly comprises two horizontal beams for mounting on the platens of the injection-moulding machine and two vertical beams for crosswise mounting on the horizontal beams in multiple positions. The clamping assembly allows dies of various sizes to be clamped in one and the same machine. The temperature-adjusting system includes at least one cooling tube for detachable insertion into a blind hole formed in the die. The cooling tube is attached to coolant conduits which are permanently attached to a source of coolant. Dies can thereby be replaced quickly and easily without spilling any coolant. The ejector is adapted to eject the cooled product after opening of the die. The injector pins are in an inexpensive way glued to the ejector plate. Use of the injection-moulding system provides considerable cost savings over conventional devices.

Abstract: A bottom insert for an injection mold, which insert is of a two-part configuration having a hot part which has a recess of the hot side and a cold part which has a recess of the cold side, wherein the cold part is arranged at least partially within the hot part so that the hot part at least portion-wise surrounds the cold part. The two parts of the bottom insert are preferably separable and the. hot part preferably has an opening in opposite relationship to the recess of the hot side for receiving the cold part. Further, the cold part and the hot part are desirably sealed off relative to each other, desirably by O-rings. In general, all surfaces which are provided for contact with the molding to be produced are arranged at the cold part. An insulating coating, an insulating membrane and/or a spacing element is desirably provided at the contact surface between the hot part and the cold part.

Abstract: An injection molding machine and a mold are used to form batches of hallow parts, such as PET preforms. An end of arm tool transfers the molded preforms from the mold to a temperature conditioning station having a conveyor. The batch of molded preforms is received and retained on the end of arm tool by an array of cooling tubes that are attached to a number of identical cooling tubes carrier devices. The conveyor is adapted to receive the carrier devices and the cooling tubes loaded with molded preforms from the end of arm tool. The conveyor is also adapted to transfer rapidly the carrier devices and the empty cooling tubes into the end of arm tool before the end of arm tool is moved back into the molding area to receive subsequent batches of molded preforms.

Abstract: A mold assembly comprising a mold, an insert block assembly 20 having an insert block 30, and a first electrode 60A and a second electrode 60B, the insert block 30 comprises an insert-block body 31, and an insulating layer 33, the insert block assembly 20 further comprises a heat-generating member 41 that is electrically connected to the first electrode 60A and the second electrode 60B, that is fixed on the insulating layer 33, that constitutes part of the cavity 15 and that generates Joule heat.

Abstract: An injection molding apparatus and method of use are provided whereby a net-molded optical article can be produced. Edge wave deviations are reduced by controlling the cooling profile of the resin. The apparatus can be configured to include at least one heat control element disposed adjacent to an edge of the mold cavity. After plasticized resin has been injected into the mold cavity, the edge of the mold cavity can be thermally regulated relative to the center of the cavity.

Abstract: A hardware configuration and related method for straight injection molding of ophthalmic lenses using thermal control fluid circulating within a closed channel located interior of the insert. The channel is closed by a no-leak valve. The adjusting body is equipped with a mating no leak valve. The valves seal over an operational distance L before the valves are opened to admit the thermal circulating fluid into the insert. The insert can be easily changed or shimmed without leaking and without having to change the insert configuration.

Abstract: An insert molding die, an insert molding apparatus and an insert molding method are disclosed, wherein a pair of dies 10a, 10b are arranged in a manner capable of clamping, from axis X side, an insert part 2 arranged along axis X to be insert molded. The dies 10a, 10b include first separated dies 10a1, 10b1, second separated dies 10a2, 10b2 and third separated dies 10a3, 10b3 adapted to perform the clamp operation independently of each other.

Abstract: A degating device applied to remove a cull between two chip carriers comprises a lower mold, an upper mold, a blowing-opening, and a cooling pipe. The lower mold is used to load chip carriers and has a plunger set for propping and degating the cull. The upper mold is fit in with the lower mold tightly. The airflow blown out from the blowing-opening blows to lower the temperature around the chip carriers. The cooling pipe is disposed according to the position of the blowing-opening to cool down the temperature around the blowing-opening. The two chip carriers are disposed on the lower mold and fixed between the upper mold and the lower mold while the upper mold combines with the lower mold. By changing the position of the plunger set relative to the upper mold and the lower mold, the cull can be stripped from the chip carriers.

Abstract: An injection molding device for thermosetting molding materials includes a male mold portion, and a female mold portion. The male mold portion includes an injection aperture and a sprue communicated with the injection aperture. The female mold portion is mated with the male mold portion to define a parting face therebetween and includes a cold slug well and a main runner. The cold slug well is disposed at an opposite end of the sprue relative to the injection aperture and has at least two inner sidewalls perpendicular to each other. The main runner is defined in the parting face and commutating with the sprue. The refractive index of the products molded using the injection molding device may be obtained via directly measuring that of the cold slug after molding. Therefore, the time spent to measure the refractive index of the products is less than the conventional method.

Abstract: A molding device includes a male mold and a female mold. The female mold is set opposite to the male mold and forms and a displacement bore and includes insert, which is provided with a heating device, and has a coupling portion. A fixing board is arranged above and coupled to the female mold by at least one guide post, which extends into the displacement bore of the female mold. The fixing board is provided with a cooling metal block, which is extendable into the coupling portion of the female mold to engage the insert to thereby allow the cooling metal block to absorb the heat of the molds for dissipation and thus efficiently lowering the temperature of the molds. The heating device provides thermal energy to set the molds at the optimum temperature for injection molding.

Abstract: Disclosed is a preferred mold design for producing plastic, molded preforms, which may be blow-molded into a container of a final, desired shape. A preferred mold includes a temperature control system for maintaining the preform mold at a desired temperature. The temperature control system can pass fluid through channels within the preform mold to cool plastic that is injected into the preform mold. In some arrangements, a mold comprises a neck finish mold, the neck finish mold comprising high heat transfer material positioned to transfer heat away from melt within a mold cavity of the mold.

Abstract: An injection molding machine is provided, including a nozzle assembly having a channel for conveying a fluid. At least one cavity insert is removably mounted within a cavity plate, the at least one cavity insert defining a mold cavity, and a first portion of a gate for communicating the fluid between the nozzle assembly and the mold cavity. A gate insert defines a receptacle for the nozzle assembly, and further defining a second portion of the gate. The gate insert is floatably retained between the nozzle assembly and the at least one cavity insert. Preferably, the gate insert is retained by a gate insert plate that is disposed between the cavity plate and the nozzle assembly.

Abstract: A cooling system for cooling tool parts. The system includes at least one base system including a fluid guided from a fluid inlet through connector lines to a fluid outlet. The tool parts are connected in the direction of through-flow between at least one connector line connected to the fluid inlet and at least one connected to the fluid outlet, wherein, between the at least one connector line connected to the fluid inlet and the at least one connector line connected to the fluid outlet, at least one additional connector line and tool parts which are in flow communication therewith are placed in between such that, on its flow path, the fluid flows through at least two tool parts one after the other.

Abstract: Methods and apparatuses for manufacturing components used in the manufacture of wearable articles are presented. Some of the methods of manufacturing a mold and the apparatuses themselves include, among other features, forming a plate having a mold insert. The mold insert is removably connected to the plate and is formed using a rapid prototyping technique. In addition, methods for manufacturing wearable articles are presented. The methods generally including forming a mold, including a mold insert formed using a rapid prototyping technique. In addition, the methods include performing the steps of a molding operation on the mold. The molding operation may include any of several known molding operations.

Abstract: Disclosed are a mold stack of a molding machine. A cavity insert is provided. The cavity insert comprises a body having: an internal surface defining, in use, at least a body portion of a molding cavity; an external surface defining, in use, at least a first portion of a cooling channel configured, in use, to direct a flow of coolant; and a mounting flange configured to support, in use, the body relative to a front face of a cavity plate, the mounting flange including a member configured to define, in use, a second portion of the cooling channel.

Abstract: A synthetic resin molding mold assembly, is provided for rapidly heating a cavity surface without suffering from any temperature variation in the cavity surface when a temperature of the cavity surface increases; this condition is not affected by a contour of the cavity surface; and, may prevent any weld line from occurring without prolonging a molding cycle time. A mold insert is employed that is divided into an insert front piece with the cavity surface and an insert rear piece without the cavity surface. A fluid passage is formed to pass through the front piece in the vicinity of the cavity surface and extends from a rear surface of the rear piece to pass there-through toward the cavity surface, receives an electric heater therein, and is then closed with the rear piece to dispose the heater in a deepest portion of the fluid passage.

Abstract: An baffle plug comprising a base and a blade extending therefrom. The baffle plug is used in a bore to divide the bore into longitudinally extending passages and cause the liquid to flow serially back and forth through the bore. The blade may comprise various fluid directing structures providing for efficient fluid flow across the surfaces of the blade. The blade may also comprise one or more structures which create turbulent flow of the fluid flowing across the surface of the blade.

Abstract: An temperature control apparatus includes a temperature detecting element (50), a control circuit (60), and a thermoelectric unit (70). The temperature detecting element contacts to a first surface (82) of a predetermined target (800). The control circuit is electrically connected to the temperature detecting element. The thermoelectric unit is electrically connected to the control circuit, and contacts a second surface of the predetermined target. The temperature detecting element detects a temperature signal. The temperature signal is input into the control circuit. The control circuit changes the temperature signal into an electrical current signal, and the electrical current signal drives the thermoelectric unit to control the temperature of the predetermined target.

Abstract: Tools of plastics processing machines are cooled over their surface and/or at particular points as soon as compound supply is finished. Heat is thus suitably withdrawn from the shaped compound, ensuring the fastest possible cooling and shortening cycle times. The invention relates to a closed, coolant-filled cooling system for tools of plastics processing machines having at least one compressor, a supply pipe, a tool region to be cooled and a discharge pipe, the supply pipe being connected to the outlet of the compressor and the discharge pipe being connected to the inlet of the compressor, while at least one open end of the supply pipe plunges into at least one bore arranged in the tool region to be cooled, and an open end of the discharge pipe is sealed to this bore. The supply pipe and the discharge pipe may be combined in a coaxial pipe with the supply pipe arranged in the centre and the discharge pipe enveloping the supply pipe.

Abstract: The present invention provides an apparatus for molding a material such as plastic. The apparatus includes a mold body, a first plurality of ribs, and a second plurality of ribs. The mold body includes a molding skin of substantially uniform thickness having a first surface and a second surface. The first surface is adapted to mold a part. The second surface is opposite the first surface. The first plurality of ribs extend from the second surface. A plurality of thermal conduction surfaces are defined on the second surface between the first plurality of ribs. The second plurality of ribs are interleaved with the first plurality of ribs. The second plurality of ribs include end surfaces displaced a substantially uniform distance from the plurality of thermal conduction surfaces to define a plurality of fluid flow conduits adapted to contain a coolant.