Patent EP0456866A1 successfully refreshed from Google Patents.

EP0456866A1 Expired / Lapsed EP ⏱️ 0.0 years remaining

Blow mold

Assignee: Nissei ASB Machine Co Ltd

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Filing: 1990-05-17

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Granted: —

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Expires: 2010-05-17

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Abstract

Abstract A blow mold includes first and second mold halves (1, 2) pivotably mounted about a pivot shaft (5) and including boundary faces (42, 43) which engage with each other to form an internal chamber (7) used to blow mold a hollow article (8); a locked member (57) on the end of said first mold half (1) opposite to said pivot shaft (5) and adapted to be locked relatively to said second mold half (2) when said boundary faces (42, 43) are engaged with each other; a locking member (52) movably supported by the end of said second mold half (2) opposite to said pivot shaft (5) and adapted to lock said locked member (57) when the boundary faces (42, 43) are brought into contact with each other and to unlock said locked member before said boundary faces are separated apart from each other; and a mold drive/control mechanism (23 to 28) responsive to the driving force from a single power source to control an operative step between the pivotal movement of said first and second mold halves toward each other and the subsequent locking motion of said locking member and also another operative step between the unlocking motion of said locking member and the pivotal movement of said first and second mold halves apart from each other. The mold drive/control mechanism can realize the harmonization of the pivotal movement of the first and second mold halves with the lock/unlock action of the locking member and the smooth drive of the blow mold in a positive and rapid manner.

Inventors

👤 Hermann Voss

Bibliographic Details

Application Number —

Jurisdiction EP

Data Source google_patents

Last Synchronized 2026-11-09 08:48

CPC Classifications

B; B29; B29C; B29C33/00; B29C33/20; B29C33/26; B29C33/202; B29C49/00; B29C49/42; B29C49/56; B29C49/5601; B29C49/5602; B29C2049/566; B29C2049/5661

Claims Analysis

Total Claims: 8

Claim 1

Independent Claim 192 words

A blow mold comprising: first and second mold halves pivotably mounted about a pivot shaft and including boundary faces which engage with each other to form an internal chamber used to blow mold a hollow article; locked means on the end of said first mold half opposite to said pivot shaft and adapted to be locked relative to said second mold half when said boundary faces are engaged by each other; locking means movably supported by the end of said second mold half opposite to said pivot shaft and adapted to lock said locked means when the boundary faces are brought into contact with each other and to unlock said locked means before said boundary faces are separated apart from each other; and mold drive/control means responsive to the driving force from a single power source to control an operative step between the pivotal movement of said first and second mold halves toward each other and the subsequent locking motion of said locking means and also another operative step between the unlocking motion of said locking means and the pivotal movement of said first and second mold halves apart from each other.

Claim 2

Dependent Claim 107 words

A blow mold as defined in claim 1 wherein said mold drive/control means comprises: a control slider reciprocatable from said power source; mold motion control cam means formed on the camming face of said control slider; lock/unlock control cam means formed on the camming face of said control slider; mold drive cam follower means driven by said mold motion control cam means to create an actuating force for pivotably moving said first and second mold halves toward and apart from each other; and lock/unlock drive cam follower means driven by said lock/unlock control cam means to create an actuating force for locking and unlocking said locking means.

Claim 3

Dependent Claim 129 words

A blow mold as defined in claim 2 wherein the camming face of said control slider on which said mold motion control cam means is formed is located to concentrically surround said pivot shaft and wherein said mold motion control cam means includes first and second cams each for pivotably moving the corresponding one of said first and second mold halves, said first and second cams being such that they are spaced apart from each other with the minimum spacing when said first and second mold halves are moved apart from each other and such that the first and second cams are spaced apart from each other with the maximum spacing when the first and second mold halves are brought into contact with each other at their boundary faces.

Claim 4

Dependent Claim 53 words

A blow mold as defined in any one of claims 1 to 3, further comprising a swingable lever pivotably moved through the movement of said lock/unlock drive cam follower means, said swingable lever including one end which engages said locking means to slidably move said locking means to its lock or unlock position.

Claim 5

Dependent Claim 86 words

A blow mold as defined in any one of claims 1 to 4, further comprising a bottom mold co-operating with said first and second mold halves at a position adjacent to one end of said pivot shaft to form part of said internal chamber for molding the bottom wall of said hollow article and wherein said bottom mold is connected with bottom mold drive/control means adapted to receive the driving force from said single power source to move said bottom mold vertically along said pivot shaft.

Claim 6

Dependent Claim 32 words

A blow mold as defined in claim 5 wherein said bottom mold includes a raised portion formed therein for forming an inwardly convex bottom wall of said hollow article extending inwardly thereinto.

Claim 7

Dependent Claim 123 words

A blow mold as defined in claim 5 or 6 wherein said bottom mold drive/control means comprises: a slider block reciprocatable with said control slider; a drive cam formed in said slider block; a control cylinder having a cam follower driven by said drive cam, said control cylinder being reversibly rotatable through the reciprocation of said slider block; a bottom mold drive/control cam formed in the camming face of said control cylinder; and a bottom mold drive lever having a pivot point at its middle between the opposite ends, said lever having one end on which a cam follower driven by said bottom mold drive/control cam is formed, the other end of said lever being adapted to move vertically with said bottom mold.

Claim 8

Dependent Claim 67 words

A blow mold as defined in any one of claims 5 to 7 wherein said bottom mold and said first and second mold halves have pressure faces sloped substantially with the same angle and wherein when said internal chamber is defined by said first and second mold halves and said bottom mold, said bottom mold is self-centered by bringing said pressure faces into engagement with each other.

References Cited (Backward Citations)

FR2457171A1 Cited

FR2552709A1 Cited

DE3729451C1 Cited

DE3732342C1 Cited

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