GB2034629A - Making rubber gloves by dipping a hollow electroform - Google Patents
Making rubber gloves by dipping a hollow electroform Download PDFInfo
- Publication number
- GB2034629A GB2034629A GB7931660A GB7931660A GB2034629A GB 2034629 A GB2034629 A GB 2034629A GB 7931660 A GB7931660 A GB 7931660A GB 7931660 A GB7931660 A GB 7931660A GB 2034629 A GB2034629 A GB 2034629A
- Authority
- GB
- United Kingdom
- Prior art keywords
- electroform
- former
- hollow
- deposit
- inch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 229920001971 elastomer Polymers 0.000 title abstract description 6
- 238000007598 dipping method Methods 0.000 title abstract description 3
- 238000000034 method Methods 0.000 claims abstract description 22
- 239000002184 metal Substances 0.000 claims abstract description 12
- 229910052751 metal Inorganic materials 0.000 claims abstract description 12
- 229910052802 copper Inorganic materials 0.000 claims abstract description 7
- 229910052759 nickel Inorganic materials 0.000 claims abstract description 7
- 239000004033 plastic Substances 0.000 claims abstract description 6
- 229920003023 plastic Polymers 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 4
- 239000004927 clay Substances 0.000 claims abstract description 3
- 239000002659 electrodeposit Substances 0.000 claims abstract description 3
- 239000011505 plaster Substances 0.000 claims abstract description 3
- 239000002023 wood Substances 0.000 claims abstract description 3
- 150000002739 metals Chemical class 0.000 claims abstract 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 6
- 239000010949 copper Substances 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 3
- 239000004332 silver Substances 0.000 claims description 3
- 229910000570 Cupronickel Inorganic materials 0.000 claims description 2
- YOCUPQPZWBBYIX-UHFFFAOYSA-N copper nickel Chemical compound [Ni].[Cu] YOCUPQPZWBBYIX-UHFFFAOYSA-N 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000002844 melting Methods 0.000 claims 1
- 230000008018 melting Effects 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000011248 coating agent Substances 0.000 abstract description 4
- 238000000576 coating method Methods 0.000 abstract description 4
- 229920000126 latex Polymers 0.000 abstract description 4
- 238000001035 drying Methods 0.000 abstract description 2
- 239000004816 latex Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract description 2
- 239000007921 spray Substances 0.000 abstract description 2
- 229910052573 porcelain Inorganic materials 0.000 description 7
- 239000001993 wax Substances 0.000 description 7
- 239000007787 solid Substances 0.000 description 5
- 210000003811 finger Anatomy 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 210000003813 thumb Anatomy 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000005323 electroforming Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229920006173 natural rubber latex Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 239000012858 resilient material Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0064—Producing wearing apparel
- B29D99/0067—Gloves
-
- 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
- B29C33/0011—Moulds or cores; Details thereof or accessories therefor thin-walled moulds
-
- 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
- B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents
-
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/14—Dipping a core
-
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/34—Component parts, details or accessories; Auxiliary operations
- B29C41/38—Moulds, cores or other substrates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/48—Wearing apparel
- B29L2031/4842—Outerwear
- B29L2031/4864—Gloves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Gloves (AREA)
Abstract
A method for the manufacture of a rubber or similar glove comprising the following steps:- dipping a former that is an hollow electroform shaped to resemble the human hand into a suitable wet mix such as an aqueous rubber latex dip, withdrawing the former and subjecting the coating on the former to a latex spray process and curing it under heat, drying and stripping said coating from the former to produce the glove. A master pattern of the human hand conveniently made from one of the group of materials including wax wood, plaster, clay, metal and plastics, is made electrically conductive and plated with an electrodeposit of one or more metals (e.g. Cu, Ni) and the resulting electroform removed from the pattern or vice versa. The electroform may have a wall thickness of (0.010) inch (0.25 mm) to 0.020 inch (0.50 mm).
Description
SPECIFICATION
Improved method for the manufacture of 'rubber' gloves and inter alia gloves when made by said method
This invention relates to the manufacture of gloves forthe human hand of the kind that is made from a resilient material such as rubber or plastics; the rubber may be natural or synthetic and the plastics may be, for example, polyvinyl chloride. Such gloves referred to above are generally called 'rubber' gloves for industrial, household or surgical use, and are hereinafter referred to as gloves of the kind set forth.
It is known to form gloves of the kind set forth from natural rubber latex by dipping a former at least shaped to resemble the human hand into a suitable wet mix such as an aqueous rubber latex dip, withdrawing the former and subjecting the coating on the former to a latex spray process and curing it under heat after drying and stripping said coating when so formed from the former to produce a glove, such a method is hereinafter referred to as a method of the kind set forth. Such a method is shown in United
Kingdom Patent Specification No. 1,326,102.
The method of the kind set forth may take a number of variations from that set out above but the use of a former is essential and said former takes the overall shape of a hand sometimes with thumb and no fingers or a thumb and four fingers. The former is generally of porcelain which in this art is referred to as a conventional material, but it may be of solid metal that is cast or fabricated.
In the method of the kind set forth a porcelain glove former is generally used and this is shown in the schematic of the single figure of the accompanying drawing which is a flow sequence for the manufacture of a glove of the kind set forth. To this figure is added a temperature gradient along the flow line. It will be seen readily that the time for the formation of a single glove is determined primarily by the raising of the former to a certain temperature at step II and cooling it, after heating at step IX, to a sufficiently low temperature at step
Xforthe removal of the glove from the former, which operation is a manual operation and thus controlled by the susceptibility of the human hand of the operator of the process to an acceptable working temperature which varies in different persons.This important temperature may be arbitrarily set in a range of susceptibility that does not exceed for comfort about 40C to 60 C (1 04 F to 1 40 F).
We have surprisingly found that a method of the kind set forth can be speeded and the output of gloves per working hour produced by it increased.
According to one aspect of the invention we provide a method of the kind set forth in which the former is a hollow electroform.
According to further aspects of the invention we provide a method of making a hollow electroform and the electroform when so made.
According to yet another feature of the invention we provide a glove of the kind set forth whenever made by the method of the invention.
Electroforming is the art of producing metallic objects by a process of electrodeposition and an electroform is an electroformed metallic object.
Preferably the hollow electroform for the above is about 0.010 inch (0.25 mm) thick and is made from either copper or from nickel or from a copper nickel bi-plate deposit.
The advantage to be obtained from a hollow former is shown to some extent from a comparison of the heat conductivity of porcelain with that of copper and with that of nickel from Tables of Physical and
Chemical Constants, Kaye & Laby 1959:
Porcelain 0.015
expressed in
Copper 3.85 Joule cm/cm2/s
at 0 C.
Nickel 0.91
What is not clear from these figures is the advantage to be obtained from the use of a hollow thin metal former as against a solid ceramic former such as porcelain as long used in the glove making art or indeed against a solid metal former.
One method of making an electroformed hollow former for the glove is as follows:
A master pattern of the human hand is made in one of a group of materials such as wax, wood, plaster, clay, metal and plastics. If wax is chosen a plastics two-part mould is made first from a pattern of a hand or stylized hand. Into this two-part mould is poured the molten wax. On solidification the wax is removed from the mould. By the term human hand is herein meant either an exact replica of the male or female hand of various sizes or a stylized form that resembles the human hand with or without fingers.
The wax form is now made electrically conductive by spraying with silver, and by electrolysis electro-deposits of a metal preferably copper or nickel or a biplate deposit of copper and nickel is plated onto the silver surface of the wax. The wax is finally melted out of the electroform leaving a hollow former in the shape of a hand with a metal wall thickness of about 0.010 inch (0.25 mm) to 0.020 inch (0.50 mm).
The advantage to be obtained from such a hollow former in comparison with a porcelain former is shown in the figure of the accompanying drawings in which temperature is taken along the ordinate and time along the abscissa. Clearly the times between steps II and Ill and between steps IX and X are much reduced with a hollow electroform owing to the exceptionally good heat conductivity of the thin metal over that of solid porcelain or solid metal.
Claims (8)
1. A method of the kind set forth in which the former is a hollow electroform.
2. The method according to Claim 1, wherein the electroform is made from a deposit of copper.
3. The method according to Claim 1, wherein the electroform is made from a deposit of nickel.
4 The method according to Claim 1, wherein the electroform is made from a copper nickel biplate deposit.
5. The method of any one of Claims 2 to 4, wherein the thickness of the deposit is in the range 0.010 inch (0.25 mm) to 0.020 inch (0.50 mm).
6. An electroform for use in the method of any preceding claim, wherein said electroform is made by the following steps, a master pattern of the human hand as hereinbefore defined is made from one of the group of materials including wax wood, plaster, clay, metal and plastics, the master pattern is made electrically conductive and plated with an electrodeposit of one or more metals and the deposit removed from the pattern or vice versa.
7. The electroform according to Claim 6, wherein the electrical conductivity is provided by spraying a master pattern of wax with silver and melting out the wax from the electroform.
8. A glove whenever made by the method of any one of Claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7931660A GB2034629A (en) | 1978-11-02 | 1979-09-12 | Making rubber gloves by dipping a hollow electroform |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB7843044 | 1978-11-02 | ||
| GB7931660A GB2034629A (en) | 1978-11-02 | 1979-09-12 | Making rubber gloves by dipping a hollow electroform |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB2034629A true GB2034629A (en) | 1980-06-11 |
Family
ID=26269436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB7931660A Withdrawn GB2034629A (en) | 1978-11-02 | 1979-09-12 | Making rubber gloves by dipping a hollow electroform |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2034629A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5116551A (en) * | 1987-05-07 | 1992-05-26 | Davidson Roderick I | Method and apparatus for producing an article by microwave heating |
| WO2016097152A3 (en) * | 2014-12-17 | 2016-11-24 | Dsm Ip Assets B.V. | Plastic material for industrial former |
-
1979
- 1979-09-12 GB GB7931660A patent/GB2034629A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5116551A (en) * | 1987-05-07 | 1992-05-26 | Davidson Roderick I | Method and apparatus for producing an article by microwave heating |
| WO2016097152A3 (en) * | 2014-12-17 | 2016-11-24 | Dsm Ip Assets B.V. | Plastic material for industrial former |
| EP3479985A3 (en) * | 2014-12-17 | 2019-06-05 | DSM IP Assets B.V. | Plastic material for industrial former |
| US11224997B2 (en) | 2014-12-17 | 2022-01-18 | Dsm Ip Assets B.V. | Plastic material for industrial former |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| WAP | Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1) |