Abrégé

An assembly of a container (10) and a lid (13) of plastic material, in which the container (10) and the lid (13) are provided with a respective outer skirt (15, 28) having snap engaging annular locking beads (16, 17; 30, 32) for the lid (13), configured with seal surfaces. The outer skirt (28) of the lid (13) is provided with a hooking crown (40) having a plurality of outwardly facing tabs (41), side by side arranged and separated by transverse slits (42); each tab (41) is connected to a lower rim of the skirt (28) of the lid (13), by an elastically flexible hinge (42) to allow, in the assembled condition of the lid (13) and of the container (10), the hooking crown (40) to be introduced into an upwardly facing channel (18) of the skirt (15) of the container (10), and the hooking with an annular bead (20).

Classes IPC  ?

• B65D 43/02 - Couvercles ou chapeaux amovibles

Abrégé

A lid-container assembly made of synthetic plastic material suitable for the transportation and storage of hazardous materials in conformity to the UN standard. The container includes a bottom and a substantially cylindrical or cone trunk side wall having an upper edge that bounds an access opening. The container is provided with a first external annular strip provided with a first circular rib and with at least one second circular rib for snap fitting of the lid. The lid includes a central part and a peripheral wall that conforms to the side wall of the container and further includes a second external annular strip that releasably engages the corresponding external annular strip of the container. The second external annular strip has an upper annular element that connects to the peripheral wall by an upturned U-shaped upper annular channel, and includes a lower annular element inserted into a lower annular channel in the form of an upwards pointing U, and an intermediate annular element for tear opening. The lower annular element of the second external strip includes a circular rib that engages a corresponding internal rib of the lower annular channel of the first external strip. The lid-container assembly further includes a first interference sealing zone between opposite surfaces of the side wall of the container and of the peripheral wall of the lid, a second contact sealing zone between the upper edge of the side wall of the container and the interior of the upper annular channel, and at least one third contact sealing zone between opposite engaging ribs of the first and second external annular strips.

Classes IPC  ?

• B65D 43/02 - Couvercles ou chapeaux amovibles

Abrégé

It is described a method and an apparatus for injection co-mould and assemble plastic material objects having a first part provided with a hinge pin, and a second part provided with an annular element suitable to be coupled in an articulated manner. The apparatus includes a mould having separated moulding impressions for the two parts to be moulded; a first moulding pin element defining the pin impression and a second moulding pin element defining the annular element impression are provided. The apparatus includes cooling means; particularly the first pin element is internally provided with a channel and a tubular element, being coaxially arranged and defining a cooling gap. A cooling fluid flows through the tubular element and the gap. Cams are provided which axially move the pin elements to cause the automatic assembly of the object during the mould opening and then to allow extracting the moulded object.

Classes IPC  ?

• B29C 45/16 - Fabrication d'objets multicouches ou polychromes
• B29C 45/32 - Moules comportant plusieurs cavités de moulage axialement espacées
• B29C 45/00 - Moulage par injection, c.-à-d. en forçant un volume déterminé de matière à mouler par une buse d'injection dans un moule ferméAppareils à cet effet

Abrégé

A lid-container assembly (1, 2) made of plastic material suitable for the transportation and storage of hazardous materials in conformity to the UN standard; the container (1) comprises a bottom (20) and a substantially cylindrical or cone trunk side wall (3) having an upper edge (4) that bounds an access opening; the container (1) is provided with a first external annular strip (5) provided with a first circular rib (6) and with at least one second circular rib (7) for snap fitting of the lid (2); the lid (2) comprises a central part (8) and a peripheral wall (9) that conforms to the side wall (3) of the container (1); the lid (2) further comprises a second external annular strip (10) that releasably engages the corresponding external annular strip (5) of the container (1). The external annular strip (10) of the lid (2) has an upper annular element (11) that connects to the peripheral wall (9) by an upturned U-shaped upper annular channel (12), and comprises a lower annular element (15) configured for being inserted into a lower annular channel (18) in the form of a U pointing upwards, and an intermediate annular element (13) for tear opening; the lower annular element (15) of the external strip (10) of the lid (2) is configured with a circular rib (17) of the lid (2) that engages a corresponding internal rib (19) to the lower annular channel (18) of the external strip (5) of the container (1). The lid-container assembly (1, 2) further comprises a first (21) interference sealing zone between opposite surfaces of the side wall (3) of the container (1) and of the peripheral wall (9) of the lid (2); a second (22) contact sealing zone between the upper edge (4) of the side wall (3) of the container (1) and the interior of the upper annular channel (12); at least one third (23) contact sealing zone between opposite engaging ribs of the external annular strips (5, 10) of the lid (2) and of the container (1).

Classes IPC  ?

• B65D 43/02 - Couvercles ou chapeaux amovibles

Abrégé

A pneumatic valve device (17) for ejecting, by pressurised air, moulded articles (16) in plastic material from a cavity of a mould (10, 11); the valve device (17) comprises a valve body (18) havingan air feeding chamber (34) connectable to a pressure air source, and a spring-biased pressure-actuated valve member (20, 21). The valve member comprises a valve head (20) having fore and side surfaces (30, 27), and a stem (21) rearwardly extending from the head (20); an air flow path (32, 33) is provided in the valve member from the rear end of the steam (21) to at least one exit hole (33) on the side surface (27) of the valve head (20). The valve member (20, 21) is axially movable between a retracted position into a seat of the valve body (18), in which closes the flow path (32, 33), and an advanced position in which the valve head (20) protrudes into the cavity of the mould (10, 11). At the closure of the mould (10, 11) in case of failure, the valve head (20) firstly is moved back to an intermediate position by a movable member (11) of the mould (10, 11) into the seat to close the flow path, and then pushed into the fully retracted position by the thrust of the plastic material flowing into an annular space between facing surfaces (13, 30) of the valve head (20) and the movable member (11) of the mould.

Classes IPC  ?

• B29C 45/43 - Démoulage ou éjection des objets formés utilisant des fluides sous pression
• F16K 15/06 - Soupapes, clapets ou valves de retenue à corps de soupapes rigides guidés par tige-guide

Abrégé

Method and apparatus for injection co-molding and assembling of articles made of plastic material, the articles having a first part provided with a hinge pin, and a second part provided with an annular element designed to be connected to each other by hinging. The apparatus includes a mold having separate mold cavities for two parts of the article to be produced; a first molding member, defining the mold cavity of the pin, and a second molding member, defining the mold cavity of the annular element, are axially movable and operatively connected to cam control elements forming part of the same injection mold. The cam control elements are shaped and arranged to cause, after the opening of the mold, the automatic assembling of the plastic article, via a selective sequence of axial movements of the two molding members, during the demolding step of the molded article.

Classes IPC  ?

• B29C 65/58 - Encliquetage

Abrégé

A method and an apparatus for injection co-molding and assembling of articles made of plastic material and an injection molded article made plastic triatrial, the articles comprising a first part (10) provided with a hinge pin (14), and a second part (11) provided with an annular element (15) designed to be connected to each other by hinging. The apparatus comprises a mold (20, 21) having separate mold impressions for two parts (10, 11) of the article to be produced; a first molding member (40), defining the impression of the pin (14), and a second molding member (41), defining the impression of the annular element (15), are axially movable and operatively connected to cam control means (46, 47) forming part of the same injection mold. The cam control means (46, 47) are shaped and arranged in such a way as to cause, after the opening of the mold (20, 21 ) , the automatic assembling of the plastic article, by means of a selective sequence of axial movements of the two molding members (40, 41), during the demolding step of the molded article.

Classes IPC  ?

• B29C 45/00 - Moulage par injection, c.-à-d. en forçant un volume déterminé de matière à mouler par une buse d'injection dans un moule ferméAppareils à cet effet
• B65D 25/32 - Anses, c.-à-d. poignées pivotantes généralement de forme semi-circulaire