Contact lens mold

Abstract

This invention relates to a contact lens mold, comprising a first mold and a second mold. The first mold has an arc-shaped protrusion, a first abutment, and a second abutment, while the second mold has an arc-shaped concave portion and a second assembly portion. When the first mold and the second mold are engaged, a molding space is formed between the arc-shaped protrusion and the arc-shaped concave portion. The first abutment and one side of the second assembly portion press against each other to stably bond the first mold and the second mold, and the second abutment abuts against the other side of the second assembly portion to restrict radial deformation of the second assembly portion. This invention has the advantages and effects of preventing mold deformation, ensuring the precision of contact lens manufacturing, and improving process yield.

Claims

1. A contact lens mold, comprising: A first mold has an arcuate protrusion extending along an axial direction and a first assembly portion, the first assembly portion having a first abutment portion, a second abutment portion and a first assembly groove, wherein the first abutment portion and the second abutment portion are arranged radially spaced apart, and the first assembly groove is disposed between the first abutment portion and the second abutment portion; and a second mold for cooperating with the first mold, having an arcuate recess extending along the axial direction and a second assembly portion, the second mold also having a limiting structure having an extension segment and a limiting segment connected together, one end of the extension segment being connected to the second assembly portion, and the other end extending radially away from the second assembly portion and connected to the limiting segment, and the limiting segment extending axially away from the extension segment, such that a second assembly groove is formed between the second assembly portion, the extension segment and the limiting segment; When the first mold and the second mold cooperate with each other, a molding space is formed between the arc-shaped protrusion and the arc-shaped concave part. The second assembly part is inserted into the first assembly groove. The first abutment part and one side of the second assembly part are pressed against each other to make the first mold and the second mold stably combined. The second abutment part abuts against the other side of the second assembly part, thereby restricting the deformation of the second assembly part along the radial direction. The second abutment part is inserted into the second assembly groove, and the limiting section abuts against the second abutment part to restrict the deformation of the second abutment part along the radial direction.

2. The contact lens mold as described in claim 1, wherein, The first assembly portion surrounds the arc-shaped protrusion, and the second assembly portion surrounds the arc-shaped concave portion.

3. The contact lens mold as described in claim 2, wherein, The second abutment surrounds the first abutment, and the first abutment and the second abutment together form the first assembly groove.

4. The contact lens mold as described in claim 3, wherein, When the first mold and the second mold cooperate with each other, the second assembly part and the first abutting part are in close cooperation, and the second abutting part and the second assembly part are in sliding cooperation.

5. The contact lens mold as described in claim 4, wherein, The second abutment and the second assembly have a small gap, which is 0.01 mm to 0.03 mm.

6. The contact lens mold as claimed in claim 4, wherein, The first abutment portion has a plurality of protrusions, each of which is arranged at intervals on the side of the first abutment portion facing the first assembly groove. When the first mold and the second mold cooperate with each other, each of the protrusions and one side of the second assembly portion are pressed against each other.

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