US1755158A - Edwin becker - Google Patents
Edwin becker Download PDFInfo
- Publication number
- US1755158A US1755158A US1755158DA US1755158A US 1755158 A US1755158 A US 1755158A US 1755158D A US1755158D A US 1755158DA US 1755158 A US1755158 A US 1755158A
- Authority
- US
- United States
- Prior art keywords
- mould
- becker
- edwin
- pressing
- shape
- 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.)
- Expired - Lifetime
Links
- 238000003825 pressing Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000005498 polishing Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
-
- 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
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/027—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles having an axis of symmetry
Definitions
- This manufacturing method presents the inconvenience that the mould has to be changed, and it presents the danger that during the changing of the mould the kneadability decreases so that the preliminarily moulded disk easily crumbles to pieces in the second mould.
- the material is pressed, according to the invention, in one and the same pressing mould first to the coarse preliminary shape by corresponding gradual accumulation of the material at those points on which the greater density has to be obtained, whereupon with the aid of press ing rams shaped in accordance with the final shape this final shape is given to the material.
- the mass filled into the pressing mould is not distributed uniformly but in an inclined plane rising from the edges to the centre and compressed accordingly, so that the preliminary shape is given to the material.
- the final shape is given to the material by pressure. after the upper pressing ram has been inserted into the mould.
- pressing mould with the material is then turned upside down and a second compressing is carried out.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- Dry Formation Of Fiberboard And The Like (AREA)
- Treatment Of Fiber Materials (AREA)
Description
Patented Apr. 15, 1930 UNITED STATES PATENT OFFICE EDWIN BECKER, or BERLIN-,I-IERMSDORF, GERMANY PROCESS OF MANUFACTURING GRINDING AND POLISHING DISKS No Drawing. Application filed April 6, 1927, Serial No. 181,598, and in Germany March 16, 1926.
It is known to give to grinding and polishing disks to be produced in pressing-moulds a dense structure preferably towards the centre by giving to the disk a first shape in which the dimensions of the disk are greater towards the middle'than they are intended to be in the final shape. This was effected in such a manner that the preliminary shape was produced in one mould and the final shape in a second mould.
This manufacturing method presents the inconvenience that the mould has to be changed, and it presents the danger that during the changing of the mould the kneadability decreases so that the preliminarily moulded disk easily crumbles to pieces in the second mould.
To obviate these inconveniences the material is pressed, according to the invention, in one and the same pressing mould first to the coarse preliminary shape by corresponding gradual accumulation of the material at those points on which the greater density has to be obtained, whereupon with the aid of press ing rams shaped in accordance with the final shape this final shape is given to the material.
According to the improved method the mass filled into the pressing mould is not distributed uniformly but in an inclined plane rising from the edges to the centre and compressed accordingly, so that the preliminary shape is given to the material. In the samepressing mould the final shape is given to the material by pressure. after the upper pressing ram has been inserted into the mould. For equalizing the densities, the
pressing mould with the material is then turned upside down and a second compressing is carried out.
- I claim A process of pressing grinding and polishing disks by irregular "density by heaping the material on the point of the intended compression, consisting in distributing the material in the. mould from the edge towards .the center in an ascending plane, in submit-
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US1755158A true US1755158A (en) | 1930-04-15 |
Family
ID=3419903
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US1755158D Expired - Lifetime US1755158A (en) | Edwin becker |
Country Status (1)
| Country | Link |
|---|---|
| US (1) | US1755158A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3374513A (en) * | 1963-01-14 | 1968-03-26 | Verson Mfg Co | Pressure forming system |
-
0
- US US1755158D patent/US1755158A/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3374513A (en) * | 1963-01-14 | 1968-03-26 | Verson Mfg Co | Pressure forming system |
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