Mold

• US 20070087068A1
• Filed: 10/17/2006
• Published: 04/19/2007
• Est. Priority Date: 10/17/2005
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Inventors: Watanabe, Seiichi, Eiha, Noriko
• Granted Patent: US 7,381,047 B2
• Time in Patent Office: Days
• US Class Current: 425/168
• CPC Class Codes: B29C 45/56 using mould parts movable during or after injection, e.g. injection-compression moulding B29C45/1705 and B29C45/572 take precedence
• CPC Class Codes: B29L 2011/0016 Lenses
• CPC Class Codes: Y10S 425/808 Lens mold

Abstract

A mold capable of preventing deterioration of the mold even when a material for spherical members is harder than that for the mold, and capable of aligning the center axis between an insert member and a body member thereof with high accuracy even when a pressure of resin filling is applied. The mold has an insert member with a cavity surface, and a body member for supporting the insert member from outside via a plurality of spherical members. Tubular liners harder than the spherical members are provided between the body member and the spherical members and between the insert member and the spherical members.

Claims

1. A mold comprising:

an insert member having a cavity surface; and

a body member for supporting the insert member from outside via a plurality of spherical members,

wherein a tubular protection member harder than the spherical members is provided at least either between the body member and the spherical members or between the insert member and the spherical members.

2. The mold according to claim 1, wherein the protection member is fixed by means of shrink fitting on an inner circumferential face of the body member or an outer circumferential face of the insert-member.

3. The mold according to claim 1, wherein the protection member is formed by means of coating on the inner circumferential face of the body member or the outer circumferential face of the insert member.

4. The mold according to claim 1, wherein the molded product includes an optical lens.

5. The mold according to claim 1, wherein the molded product includes a mirror frame.

6. The mold according to claim 1, wherein the plurality of spherical members includes bearing balls.

7. The mold according to claim 1, further comprising a ball retainer for holding the plurality of spherical members in the state being spaced apart from each other.

8. The mold according to claim 1, wherein the protection member has a thickness of 0.3-3 mm.

9. The mold according to claim 1, wherein the protection member has a thickness of 1-1.5 mm.

10. The mold according to claim 1, wherein each of the plurality of spherical members has a diameter larger than the space between the insert member and the body member by about 1-6 μ

m.

11. The mold according to claim 1, wherein each of the plurality of spherical members has a diameter larger than the space between the insert member and the body member by about 1-3 μ

m.

12. The mold according to claim 3, wherein the coating is formed by means of the dry process.

13. The mold according to claim 3, wherein the coating is formed by means of the wet process.