WO2015072929A1 - Method for making "one-off" models/moulds - Google Patents
Method for making "one-off" models/moulds Download PDFInfo
- Publication number
- WO2015072929A1 WO2015072929A1 PCT/SI2013/000067 SI2013000067W WO2015072929A1 WO 2015072929 A1 WO2015072929 A1 WO 2015072929A1 SI 2013000067 W SI2013000067 W SI 2013000067W WO 2015072929 A1 WO2015072929 A1 WO 2015072929A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- mould
- model
- ribs
- making
- milling
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/44—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using isostatic pressure, e.g. pressure difference-moulding, vacuum bag-moulding, autoclave-moulding or expanding rubber-moulding
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
- B29C33/3842—Manufacturing moulds, e.g. shaping the mould surface by machining
- B29C33/3857—Manufacturing moulds, e.g. shaping the mould surface by machining by making impressions of one or more parts of models, e.g. shaped articles and including possible subsequent assembly of the parts
- B29C33/3892—Preparation of the model, e.g. by assembling parts
Definitions
- the invention relates to a method for making "one-off" models/moulds, meaning that the model/mould is made as a mould, or negative, of the final product.
- the invention pertains to the field of watercraft manufacture.
- a model and a mould must be made separately for each product, meaning that the procedure comprises a minimum of two stages and consumes more time and materials.
- a model of the product must first be made, which is then used as a basis for making a plastic mould of the model, which can then be used many times to manufacture products.
- the method for making "one-off" models/moulds comprises the following steps:
- ribs must also be defined, particularly if the product relates to a watercraft hull. Ribs are rarely used for decks and smaller pieces;
- the manual lamination procedure is followed by dry lamination and infusion.
- the manually laminated surface is first covered with a layer of glass fibre fabric, followed by a layer of balsa and another layer of glass fibre fabric.
- the entire surface is then covered with a special polyethylene mesh fabric so that the resin can run along the glass fibre fabric more easily.
- An infusion bag is then placed over everything and epoxy resin is vacuum-injected into the model/mould. After the infusion procedure is complete, the infusion bag is removed and the surface is inspected to check whether it is completely covered with resin;
- the infusion procedure is followed by the application of epoxy paste.
- the model/mould is placed in a CNC machine and levelled to be as horizontal as possible.
- Epoxy paste is applied manually or using a machine. If the epoxy paste is applied using a machine, the CAM department prepares programmes which tell the CNC machine how and where on the surface to apply the paste;
- the model/mould is rough-milled according to programmes prepared by the CAM department.
- the surface is first rough-milled. Corrections are then made on the surface if there are holes or paste is missing.
- the corrections can be made using epoxy paste applied with an applicator gun or using a covering material with a shorter drying time;
- the rough milling procedure is followed by fine milling. This procedure is longer than the rough milling procedure, as care must be taken to preserve the correct surfaces, radii, angles and markers, or the subsequent manual surface treatment of the model/mould can be greatly prolonged.
- model/mould is then manually sanded using 120-grit sandpaper and the curves are formed.
- the entire model/mould is coated with control paint so that it is easier to distinguish the sanded surfaces from non-sanded surfaces.
- a layer of covering material is then applied and sanded down using 320- grit sandpaper.
- the "one-off" model/mould thus made is then polished and is ready to be used for casting. Before the products are cast, the surface of the "one-off" model/mould must be waxed so that the product can subsequently be separated from the model/mould, as the surfaces of a "one-off” model/mould are much plainer and do not have a high gloss.
Abstract
The present invention relates to a method for making "one-off" models/moulds wherein the model of individual products is made as a mould, or negative, of the final product. The method comprises the steps of creating a design of the model/mould, wherein the dimensions of the support and ribs are defined, milling a wooden base and ribs, preparing an iron support, positioning the wooden base on the iron support with a tolerance of +/- 1mm, closing the positioned ribs with wooden strips, performing manual lamination, dry lamination and infusion, applying epoxy paste manually or using a machine, rough- and fine-milling the epoxy paste using a CNC machine and surface-treating the model/mould. Making a "one-off" model/mould saves a great deal of time and money, as it eliminates the necessity of making a plastic mould.
Description
Method for making "one-off" models/moulds
The invention relates to a method for making "one-off" models/moulds, meaning that the model/mould is made as a mould, or negative, of the final product.
The invention pertains to the field of watercraft manufacture.
In the ordinary procedure for the manufacture of products, e.g. hulls, decks or other small pieces comprising watercraft, a model and a mould must be made separately for each product, meaning that the procedure comprises a minimum of two stages and consumes more time and materials. A model of the product must first be made, which is then used as a basis for making a plastic mould of the model, which can then be used many times to manufacture products.
A need has therefore been shown for a method for manufacturing final products which consumes less time and materials. Said technical problem is solved by the present method for making models or moulds in a single stage, i.e. a "one-off" procedure, whereby the model of the product is already made as a mould, or negative, of the final product. No additional mould is therefore required, meaning that less time and materials are consumed.
The above technical problem is solved by the claimed invention.
The method for making "one-off" models/moulds, i.e. in only one stage, comprises the following steps:
- creating a design of the model/mould, which is done by CAM programmers, whereby the dimensions of the support on which the model/mould is to stand are first defined. For larger models/moulds, ribs must also be defined, particularly if the product relates to a watercraft hull. Ribs are rarely used for decks and smaller pieces;
- milling a wooden base using a CNC machine on the basis of the designs prepared by CAM programmers and, if required, milling ribs using a smaller CNC machine;
- levelling the support, which is normally made from iron, so that it is horizontal and placing the wooden base and ribs on the support, whereby the wooden base and ribs must be positioned with a tolerance of +/- lmm;
- closing the positioned ribs with wood strips, filling gaps between the strips with polyester filler and sanding the surface until smooth to prepare it for manual lamination;
- manually laminating the surface with vinyl ester resin and roving fabric, whereby only the first two layers are laminated manually;
- the manual lamination procedure is followed by dry lamination and infusion. In this stage, the manually laminated surface is first covered with a layer of glass fibre fabric, followed by a layer of balsa and another layer of glass fibre fabric. The entire surface is then covered with a special polyethylene mesh fabric so that the resin can run along the glass fibre fabric more easily. An infusion bag is then placed over everything and epoxy resin is vacuum-injected into the model/mould. After the infusion procedure is complete, the infusion bag is removed and the surface is inspected to check whether it is completely covered with resin;
- the infusion procedure is followed by the application of epoxy paste. The model/mould is placed in a CNC machine and levelled to be as horizontal as possible. Epoxy paste is applied manually or using a machine. If the epoxy paste is applied using a machine, the CAM department prepares programmes which tell the CNC machine how and where on the surface to apply the paste;
- when the epoxy paste has been applied, the model/mould is rough-milled according to programmes prepared by the CAM department. The surface is first rough-milled. Corrections are then made on the surface if there are holes or paste is missing. The corrections can be made using epoxy paste applied with an applicator gun or using a covering material with a shorter drying time;
- the rough milling procedure is followed by fine milling. This procedure is longer than the rough milling procedure, as care must be taken to preserve the correct surfaces, radii, angles and markers, or the subsequent manual surface treatment of the model/mould can be greatly prolonged.
- the model/mould is then manually sanded using 120-grit sandpaper and the curves are formed. The entire model/mould is coated with control paint so that it is easier to distinguish the sanded surfaces from non-sanded surfaces. A layer of covering material is then applied and sanded down using 320- grit sandpaper.
The "one-off" model/mould thus made is then polished and is ready to be used for casting. Before the products are cast, the surface of the "one-off" model/mould must be waxed so that the product
can subsequently be separated from the model/mould, as the surfaces of a "one-off" model/mould are much plainer and do not have a high gloss.
Claims
1. A method for making "one-off" models/moulds wherein the model of individual products is made as a mould, or negative, of the final product, comprising the steps of:
- creating a design of the model/mould, wherein the dimensions of the support and ribs are defined;
- milling a wooden base and ribs;
- preparing an iron support;
- positioning the wooden base on the iron support with a tolerance of +/- lrnm;
- closing the positioned ribs with wooden strips;
- performing manual lamination, dry lamination and infusion;
- applying epoxy paste manually or using a machine;
- rough- and fine-milling the epoxy paste using a CMC machine;
- surface-treating the model/mould.
2. The method as claimed in claim 1 wherein only the first two layers are laminated manually with vinyl ester resin and fabric.
3. The method as claimed in the previous claims wherein in the dry lamination and infusion procedure a layer of glass fibre fabric is applied, followed by a layer of balsa and another layer of glass fibre fabric, and the entire surface is then covered with a special polyethylene mesh fabric so that the resin can run along the glass fibre fabric more easily and epoxy resin is vacuum-infused into the model.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SI2013/000067 WO2015072929A1 (en) | 2013-11-15 | 2013-11-15 | Method for making "one-off" models/moulds |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/SI2013/000067 WO2015072929A1 (en) | 2013-11-15 | 2013-11-15 | Method for making "one-off" models/moulds |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2015072929A1 true WO2015072929A1 (en) | 2015-05-21 |
Family
ID=50193567
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/SI2013/000067 WO2015072929A1 (en) | 2013-11-15 | 2013-11-15 | Method for making "one-off" models/moulds |
Country Status (1)
| Country | Link |
|---|---|
| WO (1) | WO2015072929A1 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107139439A (en) * | 2017-07-14 | 2017-09-08 | 邢台华威汽车内饰有限公司 | Car ceiling heat pressing and molding mold and its forming method |
| US10821681B2 (en) | 2017-01-20 | 2020-11-03 | General Electric Company | Liquid infusion molded ceramic matrix composites and methods of forming the same |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2383009A (en) * | 2001-12-14 | 2003-06-18 | Vantico Ag | Method of making models |
| US20050152139A1 (en) * | 1996-10-22 | 2005-07-14 | Loving David S. | Process for making lighted fiberglass panels |
-
2013
- 2013-11-15 WO PCT/SI2013/000067 patent/WO2015072929A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20050152139A1 (en) * | 1996-10-22 | 2005-07-14 | Loving David S. | Process for making lighted fiberglass panels |
| GB2383009A (en) * | 2001-12-14 | 2003-06-18 | Vantico Ag | Method of making models |
Non-Patent Citations (1)
| Title |
|---|
| ADAM TILL: "Saddle trees and changing back shape", 22 March 2010 (2010-03-22), XP002726188, Retrieved from the Internet <URL:http://esiforum.mywowbb.com/forum1/540-2.html> [retrieved on 20140624] * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10821681B2 (en) | 2017-01-20 | 2020-11-03 | General Electric Company | Liquid infusion molded ceramic matrix composites and methods of forming the same |
| CN107139439A (en) * | 2017-07-14 | 2017-09-08 | 邢台华威汽车内饰有限公司 | Car ceiling heat pressing and molding mold and its forming method |
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