An injection molding method includes providing a molding device including a first mold, a second mold over the first mold and a first mold cavity defined by the first mold and the second mold; injecting a first material into the first mold cavity; forming a first layer from the first material; replacing the second mold by a third mold; injecting a second material into a second mold cavity defined by the first mold and the third mold; and forming a second layer from the second material disposed over the first layer, wherein the first material is different from the second material.

A method includes a first molding process and a second molding process performed repeatedly. The first molding process includes injecting resin into a first pair of molds, in which a first pair of divided pieces is formed and which is fitted together without an inner mold, to couple the first pair of divided pieces to form a first hollow article at an injection station. The second molding process includes (i) injecting resin into a third pair of molds, which is fitted together with one inner mold interposed therebetween, to mold a third pair of divided pieces at the injection station, (ii) taking out the first hollow article from the first pair of molds at a removing station, and (iii) removing another inner mold from a second pair of molds while leaving a second pair of divided pieces between the second pair of molds at the setup station.

In an injection molding machine in which intermediate molds are disposed movably in a mold opening/closing direction between a movable platen attached with a movable mold and a stationary platen attached with a stationary mold, setting is simplified when individually setting a setting value related to molding using the movable mold and the intermediate mold and a setting value related to molding using the stationary mold and the intermediate mold. In a method for controlling an injection molding machine 11 in which intermediate molds 18 are disposed movably in a mold opening/closing direction between a movable platen 15 attached with a movable mold 14 and a stationary platen 17 attached with a stationary mold 16, single setting enables setting of both of a setting value related to molding using the movable mold 14 and the intermediate mold 18 and a setting value related to molding using the stationary mold 16 and the intermediate mold 18.

An injection molding method includes providing a molding device including a first mold, a second mold over the first mold and a first mold cavity defined by the first mold and the second mold; injecting a first material into the first mold cavity; forming a first layer from the first material; replacing the second mold by a third mold; injecting a second material into a second mold cavity defined by the first mold and the third mold; and forming a second layer from the second material disposed over the first layer, wherein the first material is different from the second material.

A method of manufacturing a liquid ejecting head has a first molding step, a step of performing positioning and a second molding step. In the first molding step, a first member, a second member, and a third member are molded by injecting a resin at different locations inside of a set of a fixed mold, an intermediate movable mold, and a movable mold. In the step of performing positioning, the set is detached in a first direction and the intermediate movable mold and the movable mold are moved in a second direction. In the second molding step, a resin is injected to the inside of the set that is clamped to bond. During a period from the first molding step to completion of the second molding step, the first member, the second member, and the third member are held by insert mold pieces used for molding the members, respectively, in the first molding step.

An injection molding device includes a first mold half and a second mold half, which is arranged so that the second mold half can be moved linearly in in relation to the first mold half. A third mold half, arranged between the first and the second mold halves, interacts with the first mold half in a first parting plane to form first cavities and interacts with the second mold half in a second parting plane to form second cavities. The third mold half includes an upper part and a lower part, spaced apart by a slot. A first drive shaft is arranged in an interior of the third mold half. The first drive shaft includes at least one carrier arranged on an arm so that the carrier is movable in a radial direction. The first drive shaft is supported with respect to both the upper part and the lower part by at least one bearing.

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.

The present invention molds, with simple processes, a tube which has a smaller outer diameter and is hardly bent in a folded manner. The present invention includes (i) a primary molding step of forming a primary molded body by carrying out resin molding while a reinforcing member and a core pin (4) are placed in a cavity of a first mold made up of a lower mold (30) and an upper mold (40) for primary molding and (ii) a secondary molding step of covering the reinforcing member by carrying out resin molding while the primary molded body is placed in a cavity of a second mold that has an inner diameter larger than an inner diameter of the cavity of the first mold.

Disclosed is a cover window using a plastic rather than a glass, and a method for manufacturing the same. The cover window includes: a base material layer formed of a transparent plastic material; a black layer stacked on one surface of the base material layer and formed along a periphery of the base material layer; a print layer stacked on another surface of the base material layer; and a coating layer stacked on one surface of the print layer.

A method is provided for manufacturing a multi-component plastic molded part and a tool system. The method comprises a first injection molding step for molding at least one preform, and a second injection molding step for molding at least one second component onto the preform. The first and second injection molding steps are performed with an injection molding machine comprising a first outer half-mold and at least one second outer half-mold positioned on opposite sides of a rotatable carrier-block. The carrier-block has at least four side faces each comprising an inner half-mold. The preform in the first injection molding step the second component in the second injection molding step are simultaneously injection molded. The injection molding machine is opened by moving the first and second outer half-mold spaced apart from the rotatable carrier-block. The preform is carried out of the first injection molding step, the plastic molded part is carried out of the second injection molding step by rotating the carrier-block. The preform is cooled while carried by the inner-half mold on the carrier-block by means of a cooling medium. The plastic molded part is removed from the inner-half mold on the carrier-block by means of a handling means.