Production method of mold having recessed pedestal pattern, and manufacturing method of pattern sheet

Patent metadata

Field	Value
Publication number	US-10926438-B2
Application number	US-202017026286-A
Country	US
Kind code	B2
Filing date	Sep 20, 2020
Priority date	Mar 27, 2018
Publication date	Feb 23, 2021
Grant date	Feb 23, 2021

Abstract

Provided are a production method of a mold having a recessed pedestal pattern for preventing a liquid flow and a manufacturing method of a pattern sheet. A production method of a mold having a recessed pedestal pattern, has: a step of preparing an insert mold having a protruding needle pattern group; a step of preparing a mold having a first mold provided with a protruding pedestal shape and a second mold; a holding step of holding the protruding pedestal shape of the first mold and the protruding needle pattern group of the insert mold in an overlapping manner; a clamping step of performing clamping with the first mold and the second mold to form a cavity; and an injection step of filling the cavity with a resin.

First claim

What is claimed is:

1. A production method of a mold having a recessed pedestal pattern, comprising:
a step of preparing an insert mold having a protruding needle pattern group;
a step of preparing a mold having a first mold provided with a protruding pedestal shape and a second mold;
a holding step of holding the protruding pedestal shape of the first mold and the protruding needle pattern group of the insert mold in an overlapping manner;
a clamping step of performing clamping with the first mold and the second mold to form a cavity; and
an injection step of filling the cavity with a resin,
wherein in the injection step, the insert mold is deformed following the protruding pedestal shape of the first mold to form a protruding pedestal shape having a recess on a rear surface of the insert mold.

2. The production method of a mold having a recessed pedestal pattern according to claim 1 ,
wherein the insert mold has the protruding needle pattern group on a front surface of a protruding pedestal shape having a recess on a rear surface, and
in the holding step, the protruding pedestal shape of the first mold and the recess of the insert mold are held in an overlapping manner.

3. The production method of a mold having a recessed pedestal pattern according to claim 1 ,
wherein the insert mold has the same size as the protruding pedestal shape in a plan view or is smaller than the protruding pedestal shape.

4. The production method of a mold having a recessed pedestal pattern according to claim 1 ,
wherein the resin is any one of a thermosetting resin and a silicone resin.

5. The production method of a mold having a recessed pedestal pattern according to claim 1 , further comprising:
after the injection step, a curing step of heating the resin in the cavity to cure the resin; and
after the curing step, a releasing step of opening the first mold and the second mold and releasing the cured resin from the insert mold.

6. The production method of a mold having a recessed pedestal pattern according to claim 1 ,
wherein the insert mold is made of any one of a plastic resin and a metal.

7. The production method of a mold having a recessed pedestal pattern according to claim 1 ,
wherein the insert mold is an electroform and is circular in a plan view.

8. The production method of a mold having a recessed pedestal pattern according to claim 1 ,
wherein, in the clamping step, the insert mold is clamped by the first mold and the second mold.

9. A production method of a mold having a recessed pedestal pattern, comprising:
a step of producing a first mold having a recessed pedestal pattern by the production method of a mold having a recessed pedestal pattern according to claim 1 ;
an electroforming step of forming a metal body on the recessed pedestal pattern of the first mold by an electroforming treatment;
a peeling step of peeling the metal body that is an electroform from the first mold; and
a step of producing a second mold by the production method of a mold having a recessed pedestal pattern according to claim 1 , using the electroform as an insert mold.

10. A manufacturing method of a pattern sheet, comprising:
a step of producing a mold having a recessed pedestal pattern by the production method of a mold having a recessed pedestal pattern according to claim 1 ;
a supplying step of supplying a polymer solution to the recessed pedestal pattern of the mold;
a drying step of drying the polymer solution to form a polymer sheet; and
a polymer sheet releasing step of releasing the polymer sheet from the mold.

11. The manufacturing method of a pattern sheet according to claim 10 ,
wherein the polymer solution contains a water-soluble material.

Assignees

• Fujifilm Corp

Inventors

• Chai Satoshi
• Usa Toshihiro

Classifications

• C25D3/12

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• C25D1/10

  Moulds; Masks; Masterforms · CPC title

• A61M2037/0053

  Methods for producing microneedles · CPC title

• A61M2037/0046

  Solid microneedles · CPC title

• B29L2031/756

  Microarticles, nanoarticles · CPC title