Injection-moulding tool for the production of information carriers in disc form
AssigneeAWM Mold Tech AG
InventorMarkus Gabriel
Life of this patent
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Abstract
An injection-moulding tool for the production of a mould in disc form, in particular in the form of information carriers such as CDs and/or DVDs, wherein the injection-moulding tool comprises a first and a second mirror block, wherein the first and second mirror blocks lie opposite each other and are movable in relation to each other for the opening and closing of the mould, and means for actively controlling the temperature of at least one of the first and second mirror blocks. A method for producing mouldings in disc form utilizing the injection-moulding tool is also disclosed.
Claims14
An injection-moulding tool for the production of a mould in disc form, wherein the injection-moulding tool comprises:
- a first and a second mirror block, wherein the first and second mirror blocks lie opposite each other and are movable in relation to each other for the opening and closing of the mould;
- means for actively controlling the temperature of at least one of the first and second mirror blocks wherein the means comprise at least 4 cooling channels, wherein the cooling channels are constructed to follow parallel concentric paths essentially on circular lines;
- at least one feed for cooling medium and a first discharge for the cooling medium, wherein the cooling channels are connected to the feed and the first discharge so that the cooling medium carried in the cooling channels is discharged from the mirror block via the first discharge after circulating only once;
- and
- wherein the cooling channels are supplied with the cooling medium via a single feed within the mirror block, wherein the cooling channels are arranged parallel to the surface of the mirror block that is facing the injection mould and are arranged in a region near the surface, and wherein the single feed is arranged in the mirror block in a region away from the surface and is connected to the cooling channels via branches.
A method for producing mouldings in disc form comprising the steps of:
- a) using an injection-moulding tool, wherein the injection-moulding tool comprises:
- a first and a second mirror block, wherein the first and second mirror blocks lie opposite each other and are movable in relation to each other for the opening and closing of the mould;
- means for actively controlling the temperature of at least one of the first and second mirror blocks wherein the means comprise at least 4 cooling channels, wherein the cooling channels are constructed to follow parallel concentric paths essentially on circular lines;
- and
- at least one feed for cooling medium and a first discharge for the cooling medium, wherein the cooling channels are connected to the feed and the first discharge so that the cooling medium carried in the cooling channels is discharged from the mirror block via the first discharge after circulating only once, wherein the cooling channels are supplied with the cooling medium via a single feed within the mirror block, wherein the cooling channels are arranged parallel to the surface of the mirror block that is facing the injection mould and are arranged in a region near the surface, and wherein the single feed is arranged in the mirror block in a region away from the surface and is connected to the cooling channels via branches;
- and
- b) keeping the surface of at least one of the first and second mirror blocks at a defined process temperature by means of the cooling channels.
An injection-moulding tool for the production of a mould in disc form, wherein the injection-moulding tool comprises:
- a first and a second mirror block, wherein the first and second mirror blocks lie opposite each other and are movable in relation to each other for the opening and closing of the mould;
- means for actively controlling the temperature of at least one of the first and second mirror blocks wherein the means comprise at least 4 cooling channels, wherein the cooling channels are constructed to follow parallel concentric paths essentially on circular lines;
- and
- at least one feed for cooling medium and a first discharge for the cooling medium, wherein the cooling channels are connected to the feed and the first discharge so that the cooling medium carried in each of the cooling channels is discharged from the mirror block via the first discharge after circulating only once.
Dependencies are inferred from the claim text.