FR2171012A1 - Moulding by high frequency heating - with the cavity and the moulding material evacuated to eliminate bubbles - Google Patents
Moulding by high frequency heating - with the cavity and the moulding material evacuated to eliminate bubblesInfo
- Publication number
- FR2171012A1 FR2171012A1 FR7204772A FR7204772A FR2171012A1 FR 2171012 A1 FR2171012 A1 FR 2171012A1 FR 7204772 A FR7204772 A FR 7204772A FR 7204772 A FR7204772 A FR 7204772A FR 2171012 A1 FR2171012 A1 FR 2171012A1
- Authority
- FR
- France
- Prior art keywords
- moulding
- high frequency
- cavity
- frequency heating
- pref
- 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- Withdrawn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
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
- B29C43/32—Component parts, details or accessories; Auxiliary operations
-
- 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
- B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
- B29C37/006—Degassing moulding material or draining off gas during 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
- 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
- B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
-
- 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
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/56—Compression moulding under special conditions, e.g. vacuum
-
- 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
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
- B29C35/12—Dielectric heating
-
- 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
- B29C43/10—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies
- B29C43/12—Isostatic pressing, i.e. using non-rigid pressure-exerting members against rigid parts or dies using bags surrounding the moulding material or using membranes contacting the moulding material
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
Thermoformings or mouldings of synthetic resin shaped by press. with the aid of high frequency electrical heating, where the material is degassed prior to application of the h.f. field. Pref. degassing is achieved by evacuation prior to and during introduction of the material, throughout the moulding cycle. Alternatively degassing may be promoted by pressing a porous cloth on to the surface of the cast resin or paste, using a device which generates a progressive increase in press. PRef. the mould is charged with a controlled dose of material from an evacuated reservoir. For moulding e.g. PVC fluid, paste or powder compsns. to obtain items free from bubbles or surface pitting.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7204772A FR2171012A1 (en) | 1972-02-07 | 1972-02-07 | Moulding by high frequency heating - with the cavity and the moulding material evacuated to eliminate bubbles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7204772A FR2171012A1 (en) | 1972-02-07 | 1972-02-07 | Moulding by high frequency heating - with the cavity and the moulding material evacuated to eliminate bubbles |
Publications (1)
Publication Number | Publication Date |
---|---|
FR2171012A1 true FR2171012A1 (en) | 1973-09-21 |
Family
ID=9093408
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7204772A Withdrawn FR2171012A1 (en) | 1972-02-07 | 1972-02-07 | Moulding by high frequency heating - with the cavity and the moulding material evacuated to eliminate bubbles |
Country Status (1)
Country | Link |
---|---|
FR (1) | FR2171012A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2803558A1 (en) * | 2000-01-11 | 2001-07-13 | Gouillardon Gaudry | METHOD FOR PRODUCING AND PLACING AN ELASTOMERIC ENVELOPE AROUND A FULL OR HOLLOW BODY |
-
1972
- 1972-02-07 FR FR7204772A patent/FR2171012A1/en not_active Withdrawn
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2803558A1 (en) * | 2000-01-11 | 2001-07-13 | Gouillardon Gaudry | METHOD FOR PRODUCING AND PLACING AN ELASTOMERIC ENVELOPE AROUND A FULL OR HOLLOW BODY |
WO2001051268A1 (en) * | 2000-01-11 | 2001-07-19 | Gouillardon Gaudry Sa | Method for placing an elastomer envelope around an elongated body |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse |