The dust proof sleeve comprises a rubber tubular bellows part (1) with an opening at both ends for sliding onto an element fitted with the dust proof sleeve. The bellows part (1) comprises an accordion-shaped undulated wall with circumferential peaks (2) and circumferential valleys (3). The dust proof sleeve further comprises at least one reinforcement (4), which is arranged at least along a part of the circumference of the bellows part (1) and adjoins the circumferential shape of the bellows part (1). The at least one reinforcement (4) is at least partly integrated in the bellows part (1) by vulcanization. The invention further comprises a dust proof sleeve production mould and a dust proof sleeve production method.

A method of forming a handle for an oral care implement. The method may include first forming a core structure out of a first hard plastic. Next, an elongated handle body may be formed out of a second hard plastic, whereby during formation the elongated handle body is made to partially surround the core structure, while leaving opposing surfaces of the core structure exposed. Finally, a grip cover may be formed out of a resilient material and positioned over at least a portion of the elongated handle body. The oral care implement handle formed by the method may include a handle having an elongated handle body and a core structure. The elongated handle body may have openings in opposing surfaces. The core structure may be partially surrounded by the elongated handle body while protruding from the openings.

Provided is a pick for guitar performance and manufacturing method thereof. The method of manufacturing a pick for guitar performance comprises preparing a first mold and a second mold disposed to face each other in a horizontal direction, mounting an inner magnet in a first holder pin formed in a central portion of the first mold, disposing the inner magnet to support the inner magnet by using first to third support pins formed in the first mold and disposed in a triangular shape at intervals of 120 around the first holder pin based on the first holder pin, operating the second mold so that a second holder pin formed at a central portion of the second mold contacts the first holder pin by moving the second mold in a horizontal direction, operating the fourth to sixth support pins formed in the second mold to support the inner magnet by being disposed in a triangular shape at intervals of 120 around the second holder pin based on the second holder pin according to a horizontal movement of the second mold, injecting resin into a resin inlet formed along a central portion of the first mold after the first mold and the second mold contact each other, and injecting the injected resin to surround the inner magnet, and solidifying the resin in a liquid state to complete the pick in which the inner magnet is disposed therein.

An electronic module has a rear surface-exposed conductor 10, 20, 30 having a rear surface-exposed part 12, 22, 32 whose rear surface is exposed; an electronic element 15, 25 provided on a front surface of the rear surface-exposed conductor 10, 20, 30; and a connector 60 configure to connect the rear surface-exposed conductor 10, 20, 30 and the electronic element 15, 25 or two rear surface-exposed conductors 10, 20, 30 each other. A groove 150 is provided on the front surface of the rear surface-exposed conductor 10, 20, 30. The sealing part 90 is provided with a press hole or a press impression 110, 120, 130 used to press the rear surface-exposed conductor 10, 20, 30. In an in-plane direction, a center portion of the press hole or the press impression 110, 120, 130 is provided on the side opposite to the connector 60 or the electronic element 15, 25 with respect to the groove 150.

An injection moulding apparatus and method for producing a moulded article is disclosed herein. In a described embodiment, the method comprises: (i) securing a layer of film to a part of a first mould half at step 504; (ii) adjusting relative position of the first mould component and a second mould component to an initial moulding position at step 506 to define a mould cavity; (iii) injecting molten moulding material into the mould cavity at step 508 to enable the molten moulding material to contact the layer of protective film; (iv) moving a movable core at step 510 to compress the molten moulding material in the mould cavity; and (v) cooling the compressed molten moulding material at step 514 to bond the layer of film to the cooled moulding material to form the moulded article.

An oral care implement having a multi-component handle. The oral care implement may include a head and a handle. The handle may have a front surface, a rear surface, and opposing first and second lateral surfaces. The handle may include an elongated handle body, a grip cover, and a transparent component. The elongated handle body and the grip cover may be opaque. The elongated handle body may form a portion of the front surface of the handle and the grip cover may form a portion of the rear surface of the handle. The transparent component may form a portion of each of the first and second lateral surfaces of the handle. Thus, the transparent component may form a window through the lateral surfaces of the handle.

Performed are an accommodation step of accommodating a pair of conductive members in a die, a sealing step of injecting a resin to seal the conductive members, and an extraction step of extracting a conductive member module. In the sealing step, the conductive members are sealed while a force is applied by the resin injected into the die to the individual conductive members in directions away from each other, and the individual conductive members are supported by support members disposed outside.

A conductive member module has a pair of conductive members formed in a plate shape and facing each other, and a sealing part. The conductive member module is produced by performing an accommodation step, a sealing step, and an extraction step. In the accommodation step, the two individual conductive members are sandwiched in the facing orientation thereof by outer support members abutting outer surfaces of the conductive members, and inner support members abutting inner surfaces of the conductive members. Outer recesses are formed in the outer surfaces by the outer support members, and inner recesses are formed in the inner surfaces by the inner support members. The outer recesses are deeper in the Z direction than the inner recesses.

An injection moulding apparatus and method for producing a moulded article is disclosed herein. In a described embodiment, the method comprises: (i) securing a layer of film to a part of a first mould half at step 504; (ii) adjusting relative position of the first mould component and a second mould component to an initial moulding position at step 506 to define a mould cavity; (iii) injecting molten moulding material into the mould cavity at step 508 to enable the molten moulding material to contact the layer of protective film; (iv) moving a movable core at step 510 to compress the molten moulding material in the mould cavity; and (v) cooling the compressed molten moulding material at step 514 to bond the layer of film to the cooled moulding material to form the moulded article.

A golf ball 2 includes a core 4 and a cover 6 positioned outside the core 4. The cover 6 is formed in a mold having support pins by injection molding. A ratio (V/S) of a volume V (mm.sup.3) of the cover 6 to an amount of compressive deformation S (mm) of the core 4 is not less than 1000 and not greater than 1900. The cover 6 has a shore D hardness of not greater than 62. The golf ball 2 has a plurality of dimples 8 on a surface thereof. A total volume W of these dimples is not less than 490 mm.sup.3 and not greater than 620 mm.sup.3. A ratio (/P) of a latitude (degree) of each support pin to a total cross-sectional area P (mm.sup.2) of the support pins is not less than 0.35 and not greater than 0.60.