摘要:
An injection compression molding method of a lens is provided, where a toggle link mechanism (65) is actuated to close a molding die (50) and a movable die plate (64) is moved to a position establishing a cavity thickness of greater than a thickness of an article to be molded while the die is closed. After injecting a molten resin into the cavity, the molten resin is sealed in the cavity and the toggle link mechanism (65) is actuated to advance the movable die plate (64) toward a fixed die plate (61), the relative position of a rear die plate (62) and the movable die plate (64) is made constant at a position where extension of a tie bar (63) becomes a predetermined value, and the molten resin is cooled for a predetermined time after completion of pressurizing the resin.
摘要:
An injection compression molding method of a lens is provided, where a toggle link mechanism (65) is actuated to close a molding die (50) and a movable die plate (64) is moved to a position establishing a cavity thickness of greater than a thickness of an article to be molded while the die is closed. After injecting a molten resin into the cavity, the molten resin is sealed in the cavity and the toggle link mechanism (65) is actuated to advance the movable die plate (64) toward a fixed die plate (61), the relative position of a rear die plate (62) and the movable die plate (64) is made constant at a position where extension of a tie bar (63) becomes a predetermined value, and the molten resin is cooled for a predetermined time after completion of pressurizing the resin.
摘要:
A metal vapor discharge lamp including an arc tube 1 that includes a container 10 and power transmission members 20a and 20b. The container 10, made of translucent ceramic, is divided into a main tube portion 11 and narrow tube portions 12a and 12b extending out from both ends of the main tube portion 11. The power transmission members 20a and 20b respectively include electrode pins 21a and 21b made of tungsten. Coils 22a and 22b made of tungsten are respectively wound around ends of electrode pins 21a and 21b, which are respectively joined with electrode supporting members 23a and 23b made of conductive cermet. Electrode length L1 is set to (0.041P+0.5) mm to (0.041P+8.0) mm, “P” representing a lamp power in watts. Alternatively, a narrow tube portion length L2 is set to (0.032P+3.5) mm to (0.032P+8.0) mm inclusive.
摘要:
In an injection compression molding method of a lens, in which a mold is closed to preserve a predetermined compressing margin in a cavity 3 for a lens, molten resin is injected and fed into the cavity 3 for the lens, and compressed for the aforementioned predetermined compressing margin before or after the injection and the feed of the molten resin is completed, the predetermined compressing margin (the degree of slightly opening S.sub.(-)) for producing a minus lens is molded is defined to be larger than the predetermined compressing margin (the degree of slightly opening S.sub.(+)) for producing a plus lens is molded. As a result, even when the minus lens is molded, the larger area of the cavity can be ensure and a flow property of the molten resin in the cavity is improved, so that the molten resin reached the inside of the cavity 3 flow through the central portion of the cavity 3 into the peripheral portion, with the result that the appearance of a weld mark in the central portion is avoided.
摘要:
An upper die 1 of a movable die corresponding with a lower die 2 of a stationary die is composed of a die body 3 and a die fitting member 4, in which a back insert 29, a hydraulic cylinder 23 and a pressure receiving portion 30 as a holding member of an insert 20 forming a cavity 22 is abutted to the die fitting member 4 by being urged upward by a spring 32. After resin, fed into the cavity 22, is compressed with the insert 20 by lifting the die fitting member 4 down, when the die fitting member 4 is lifted up at the degree of slightly opening S, by lifting the insert 20 down to be relatively to the die fitting member 4 with an eject pin 34, a space A between a molding 44 and the insert 20 is to be smaller, and the molding 44 is pushed out by causing the eject pin 34 to lift the insert 20 down when the upper die 1 and the lower die 2 are separated.
摘要:
A golf club head composed of an outer shell made of a fiber-reinforced resin and a core made of a syntactic foam and formed in the outer shell, wherein the syntactic foam comprises a matrix resin with glass microballoons as a main component and whiskers mixed therein.
摘要:
An injection compression molding method for injecting and compressing molten resin to obtain molding product using a molding die internally having a lens-forming cavity includes a pair of relatively movable inserts; a gate; a runner; and a sprue. The molten resin is injected and filled into the cavity and volume of the cavity is reduced by moving one insert toward the other insert after a time period prior to completion of injecting and filling the molten resin. At the time, a gate shut pin is protruded into the gate in synchronization with the movement of the insert to gradually close the opening of the gate. Accordingly, two demands, i.e. lower resistance in filling the cavity with the molten resin and shutting in the molten resin after the molten resin is packed in the cavity, can both be satisfied. This improves productivity and enables the production of mold products having highly accurate configuration and high quality.
摘要:
A golf bag is provided at least on an upper region of an inner surface of a bag body with a member for guiding a shaft of a golf club when the golf club is drawn out of and inserted into the bag body.
摘要:
A mold assembly having at least one mold body with at least one cavity formed therein. The mold includes at least one mold insert coupling portion formed on the mold body; at least one mold insert being of substantially complementary size and shape with respect to the mold insert coupling portion, each insert being provided with a tapered guide surface for guiding the mold insert into the mold insert coupling portion; at least one means for clamping the mold insert in a predetermined position within the mold insert coupling portion. The mold insert is reciprocally movable within the mold insert coupling portion in a direction generally perpendicular to the parting line of the mold assembly.
摘要:
A wood golf club head equipped with steps which extend transversely on an upper surface of the head or a single large dimple of specific dimensions and location that extends over the rear portion of the upper surface of the club head.