Abstract: A resin molding method includes a first molding step, a sliding step, a second molding step and a mold opening step. In the first molding step, first molded part supported in a fixed mold and a second molded part supported in a die slide mold are molded in different positions in a second direction. In the sliding step, the movable mold is removed in a first direction and the first molded part and the second molded part are aligned by the die slide mold is moved in the second direction. In the second molding step, the movable mold is clamped again with the fixed mold and resin is injected into engaged portions. Each of the first molded part and the second molded part includes at least one wall extending in the first direction, and in the second molding step, the first molded part and the second molded part are engaged with each other at sides of the walls extending in the first direction.

Abstract: There is provided a liquid supply member capable of suppressing deformation of a liquid supply path and decrease in sealing property of a liquid supply path, during molding, and a manufacturing method of the liquid supply member. For that purpose, in die-slide injection molding that combines two components, a protection portion that protects a part of one component easily affected by heat and pressure, is provided on the other component.

Abstract: There is provided a manufacturing method of a liquid supply member capable of suppressing decrease in sealing property of a liquid supply path and deformation of the liquid supply path or the external shape. For that purpose, a manufacturing process of a liquid supply member prevents inflow of a molten resin into a concave portion of a portion other than a liquid supply flow path in a liquid supply member.

Abstract: A molded part including a first member having a plurality of openings and a second member contacting with a peripheral edge of each of the plurality of openings so as to cover the openings, and having a hollow portion formed by sealing the contact portion with a sealing material, wherein: the second member defines a flow channel for filling the sealing material between the first member and the second member; the second member has a branched shape in which sections corresponding to positions covering the plurality of openings are branched from each other, and portions near a gate of the flow channel are connected as a common section; and the branched shape has a bridge structure for connecting the respective branched sections.

Abstract: There is provided a method for manufacturing a liquid discharge head including a liquid discharge head substrate and a flow path forming member, the liquid discharge head substrate having a base, a pressure generation portion provided at a front surface of the base to generate pressure for discharging a liquid, and a supply port for supplying the liquid to the pressure generation portion, and the flow path forming member forming a flow path for feeding the liquid supplied from the supply port to the pressure generation portion. The method includes removing a sacrificial layer by etching the base from a back surface of the base, in a state in which an end covering portion of a cover layer for covering the sacrificial layer is covered with the resin layer. The method suppresses formation of a crack in the end covering portion that covers the end portion of the sacrificial layer.

Abstract: There is provided a manufacturing method for molding a liquid supply member by using a first mold and a second mold. The method includes a first molding step of performing injection molding to form a first component part of the liquid supply member and a plurality of component parts of the liquid supply member other than the first component part at different positions from each other, with the first and the second mold closed relative to each other, a contacting step of moving each of the formed plurality of component parts relatively to the first component part to bring the formed first component part into contact with the formed plurality of component parts, with the first and the second mold opened relative to each other, and a second molding step of performing injection molding to join the first component part and the plurality of component parts.

Abstract: A filter is compressed between facing surfaces of a first configuration component and a second configuration component, and a molten resin is poured in such a compressed state. Injection molding of the first configuration component and the second configuration component, joining of the configuration components, and sealing of the circumference of the filter are performed by a pair of metal molds.

Abstract: A resin molding method includes a first molding step of molding a first molded part and a second molded part in a mold and a second molding step of joining the first molded part and the second molded part. In the first molding step, the second molded part is formed by injecting resin into an area where a first core movable in the first direction and a second core movable in a second direction are engaged. In the second molding step, the second molded part is joined to the first molded part by injecting the resin while the first core is in contact with the second molded part and the second core is removed from the second molded part. Areas where the first core and the second core are located in the first molding step become hollow areas connected to each other and part of ends of the first core in the first direction is not in contact with the second core.

Abstract: There is provided a manufacturing method for molding a liquid supply member by using a first mold and a second mold in which the first mold is capable of being slid relatively to the second mold, the method including a first molding step of performing injection molding to form a first and second component parts of the liquid supply member at different positions from each other, an evacuating step of sliding the formed second component part in a direction intersecting with a direction of sliding of the first mold relative to the second mold and with a direction of the opening and the closing the first and the second mold, a contacting step of bringing the formed second component part into contact with the molded first component part, and a second molding step of performing injection molding to join the first component part and the second component part.

Abstract: There is provided a method for manufacturing a liquid discharge head including a liquid discharge head substrate and a flow path forming member, the liquid discharge head substrate having a base, a pressure generation portion provided at a front surface of the base to generate pressure for discharging a liquid, and a supply port for supplying the liquid to the pressure generation portion, and the flow path forming member forming a flow path for feeding the liquid supplied from the supply port to the pressure generation portion. The method includes removing a sacrificial layer by etching the base from a back surface of the base, in a state in which an end covering portion of a cover layer for covering the sacrificial layer is covered with the resin layer. The method suppresses formation of a crack in the end covering portion that covers the end portion of the sacrificial layer.

Abstract: Provided is construction that in die slide injection molding, surely leaves each part in a mold on a specified side in the stage of opening a molding mold. In order to accomplish this, in an opening step, a push-out mechanism that applies a force on at least one of the individual parts is used to make the part surely belong to a desired mold.

Abstract: First and second constituting components are injection-molded and joined within one pair of molds. In order to join the first and second constituting components, one of the respective regions of the first and second constituting components abutted to each other is pushed into the other.

Abstract: A liquid discharge head includes a recording element substrate having first to fourth discharge port groups, each of which includes a plurality of discharge ports for discharging liquid, first flow path connecting a first liquid tank to the first discharge port group, a second flow path connecting a second liquid tank to the second discharge port group, and a third flow path connecting a third liquid tank to the third discharge port group and the fourth discharge port group, wherein a flow resistance in the first flow path is smaller than a flow resistance in the second flow path and larger than a flow resistance in the third flow path, and wherein a ratio of the flow resistance in the second flow path to the flow resistance in the third flow path is 4 or less.

Abstract: A liquid ejection head includes a substrate in which at least four inlets to which a liquid is supplied are arranged, and an ejection port forming member provided with an ejection port from which the liquid supplied to the inlets is ejected and provided in the substrate. The inlets are each formed along a first direction and are arranged in a second direction which crosses the first direction. A plurality of inter-inlet areas sandwiched between the inlets adjacent to each other has at least two types of areas different in distance between the inlets adjacent to each other, and, among the inter-inlet areas, an area positioned on each of both ends of the substrate is different from an area in which the distance between the inlets is the shortest.

Abstract: A liquid discharge head includes a recording element substrate including energy generating elements configured to generate energy for discharging liquid and a driving circuit configured to drive the energy generating elements, and a wiring unit including a plurality of connection terminals for connection with the main body side and electrically connected to the recording element substrate. In the wiring unit, wiring lines are respectively connected to the plurality of connection terminals, and a functional element configured to regulate an applied voltage to a predetermined voltage or less is provided between at least one signal wiring line connected to the driving circuit and used to transmit a signal for driving the energy generating element among the wiring lines and the wiring line having a relatively larger electric capacitance than that of the signal wiring line.

Abstract: There is provided a method for manufacturing a liquid discharge head including a liquid discharge head substrate and a flow path forming member, the liquid discharge head substrate having a base, a pressure generation portion provided at a front surface of the base to generate pressure for discharging a liquid, and a supply port for supplying the liquid to the pressure generation portion, and the flow path forming member forming a flow path for feeding the liquid supplied from the supply port to the pressure generation portion. The method includes removing a sacrificial layer by etching the base from a back surface of the base, in a state in which an end covering portion of a cover layer for covering the sacrificial layer is covered with the resin layer. The method suppresses formation of a crack in the end covering portion that covers the end portion of the sacrificial layer.

Abstract: In a liquid discharge head, a third discharge port array group C1 which discharges a liquid of cyan, a second discharge port array group M1 which discharges a liquid of magenta, a fourth discharge port array group G which discharges a liquid of gray, a first discharge port array group Y which discharges a liquid of yellow, a second discharge port array group M2 which discharges a liquid of magenta, a third discharge port array group C2 which discharges a liquid of cyan are arranged in this order, in a direction. Each of discharge port arrays of the fourth discharge port array group G is formed of a plurality of discharge ports having a diameter smaller than that of a plurality of discharge ports which constitute first discharge port arrays of the second and third discharge port array groups C1, C2, M1 and M2.

Abstract: A liquid discharge head includes a recording element substrate for discharging a liquid and a housing with the recording element substrate attached thereto. A plurality of holes having openings on a back side of an attachment surface of the housing to be attached to the carriage, are juxtaposed in a direction intersecting with a vertical direction in a state where the liquid discharge head is attached to the carriage. Two positioning bosses, on the attachment surface, are formed above two holes at both end sides of a plurality of the juxtaposed holes or above portions on an inner side than the two holes, and configured to contact the carriage to determine a position of the liquid discharge head on the carriage.

Abstract: An opposed surface of a first flow path forming member has a groove portion forming a supply passage, and a protruding portion protruding from the edge of the groove portion to form the side wall of the groove portion. An opposed surface of a second flow path forming member has a lid portion that abuts against the protruding portion of the first flow path forming member to cover the opening of the groove portion in the first flow path forming member. A joining member is formed by injection-molding of a resin to abut against an outer surface of the protruding portion of the first flow path forming member and the opposed surfaces of the first and second flow path forming members.

Abstract: Provided is a method for manufacturing a liquid-ejecting head whereby in die slide injection molding it is possible to stably inject resin in secondary molding without damaging the shapes of parts that were formed in primary molding. In order for that, in the connecting section in which a convex section of a cover member is inserted into an opening of a liquid-supply member, the closest distance to the opening in the area where secondary resin is injected is made larger than the gap between the opening and the convex section. As a result, the resin is prevented from flowing into a liquid path during the secondary molding.