GB2198685A - Process for the intermediate storage of plastic material to be processed - Google Patents
Process for the intermediate storage of plastic material to be processed Download PDFInfo
- Publication number
- GB2198685A GB2198685A GB08722924A GB8722924A GB2198685A GB 2198685 A GB2198685 A GB 2198685A GB 08722924 A GB08722924 A GB 08722924A GB 8722924 A GB8722924 A GB 8722924A GB 2198685 A GB2198685 A GB 2198685A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cover
- material container
- container
- vacuum
- processed
- 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- Withdrawn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
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
- B65D81/18—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient
- B65D81/20—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas
- B65D81/2007—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum
- B65D81/2015—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents providing specific environment for contents, e.g. temperature above or below ambient under vacuum or superatmospheric pressure, or in a special atmosphere, e.g. of inert gas under vacuum in an at least partially rigid container
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Packages (AREA)
Abstract
Plastic material to be processed on an injection molding machine is poured into convenient material containers (2) outside the machine area. After the closing of the material container with covers (5) the air inside the material container is evacuated through a check valve (9) placed in the cover and a vacuum is created. Thus the plastic material in the material container is no longer exposed to the harmful effects of oxygen and can thus be stored for a considerable time in the material container. <IMAGE>
Description
Process for intermediate storage of plastic materials to be
processed and device for embodying the process
The invention relates to a process and a device for the intermediate storage of plastic materials to be processed, especially polyester, in movable material containers which can be closed by one or more covers and are fed to the feed device of an injection molding machine.
In processing plastic materials, there is the risk of the material prematurely setting if it is exposed to the effect of air or oxygen. For this reason so-called inhibitors which fix the oxygen must be mixed into the raw material so the oxygen does not trigger the polymerization process. The longer the material must be intermediately stored and comes into contact with oxygen, the more inhibitors must be mixed in.
Pouring the polyester material to be processed into convenient material containers outside the injection molding machine, for example at the site of the raw materials production, is already known. In this way, the full material containers provided with covers can be stored in larger amounts. As needed, the material containers are moved to the location of the injection molding machine, opened, and the polyester material is brought into the feed device of the injection molding machine for processing.
In these known material containers, the polyester material poured in is still exposed to the harmful effects of oxygen due to the air in, or penetrating into, the container. With prolonged intermediate storage of the material containers, correspondingly more inhibitors must be mixed in with the polyester material to fix the oxygen. The disadvantage in this is that these inhibitors can have a negative effect on parts processing. A further disadvantage is that the styrene in the polyester material evaporates even at relatively low temperatures from the periphery of the material. Thus the "anti-seizing properties" important for processing are lost. In addition, the material located on the periphery acts differently during processing than the material further in, which does not come into contact with oxygen.
Thus the object of the invention is to avoid the disadvantages mentioned and largely to protect the plastic material in the material container from the effect of oxygen.
This object is achieved according to the invention in that a vacuum is created inside the material container after the plastic material is poured in and the cover or covers are installed.
To facilitate the installation of the cover or covers in the openings of the material container, another feature of the invention provides that the cover is placed on the front end opening of the material container after the plastic material is poured in and the creation of the vacuum pulls it into its final covering position, in which it seals the interior of the material container airtight.
To embody the process, the cover exhibits a check valve by which the inside of the material container can be connected to a vacuum device placed outside. Thus the air still in the airtight container can be evacuated so that the plastic material is in a vacuum and no longer exposed to the harmful effect of oxygen.
An advantageous design of the cover is characterized in that the cylindrical inner part of the cover exhibits an outer diameter which corresponds to the diameter of the front end opening of the material container and is made as an airtight seat and in that the outside of the cover is formed by a flange which fits against the front end of the material container when the cover is in the closed position.
An especially good seal of the material container is achieved in that a.gasket ring is placed between the cover and the material container.
The advantages achieved with the invention are especially that, due to the airtight packaging and above all the vacuum packaging, the portion of inhibitors in the plastic material previously required for fixing the oxygen can be greatly reduced.
This has a particularly positive effect on parts processing. In addition, the closing of the material container after filling is made easier because the cover is automatically pulled into the opening by the creation of the vacuum. The pressing on of the cover by hand, associated with an expenditure of energy, can thus be eliminated. The vacuum also creates a solid seat for the covers and prevents the covers from unintentionally coming loose during the handling of the material container.
An embodiment of the invention is explained in more detail in the following description and drawing. There are shown in:
fig. 1, a longitudinal section through the material container after filling, with cover placed on and
fig. 2, the material container according to Fig. 1 after the creation of the vacuum and with the cover in the closed position.
Interior 1 of a hollow cylindrical material container 2 is filled with a plastic material 3 which consists of moist polyester resin and is processed in an injection molding machine (not shown). A cover 5 each is inserted in front end openings 4 of material container 2. Cover 5 exhibits a cylindrical inner part 6 whose outer diameter is somewhat smaller than the diameter of opening 4. Between cover 5 and material container 2 a gasket ring 7 is placed which seals interior 1 airtight. The exterior of cover 5 is formed by a flange 8 which, in the closed position of cover 5, fits against the front end of material container 2 (Fig. 2). Cover 5 exhibits, on its exterior, a check valve 9 which connects interior 1 of material container 2 by a detachable hose line 10 to a vacuum device (not shown).Check valve 9 is designed so that air can only pass from interior 1 to the outside, but not from the outside to the inside. The suction device can consist of a blower or a vacuum pump.
After pouring of plastic material 3 into material containers 2, which are open on top and whose lower front end opening 4 is already closed by one of the two covers 5, the other cover 5 is placed loosely on the upper front end opening 4 (Fig. 1). Then the end of hose line 10 is put on check valve 9 and the suction device is started. The air in interior 1 is thus evacuated and cover 5 is pulled by the vacuum into its closed position until flange 8 rests against the front end of material container 2 and the latter is closed airtight (Fig. 2).
The plastic material is in a vacuum after the evacuation of air out of interior 1 and is thus no longer exposed to the harmful effects of oxygen. At the end of the evacuation process and removal of hose line 10, full material container 2 can be stored for a considerable time, to be transported to the injection molding machine as needed. In the feed device of the injection molding machine covers 5 are removed, for example by an automatic cover-removing device, and open material container 2 is emptied into the feed cylinder of the injection molding machine.
Claims (7)
1. Process for the intermediate storage of plastic materials to be processed, especially polyester, in movable material containers, which can be closed by one or more covers and transported to the feed device of an injection molding machine, characterized in that in interior of material container a vacuum is created after plastic material is poured in and cover or covers are installed.
2. Process according to claim 1, wherein cover is placed, after plastic material is poured in, on front end opening of material container and pulled by the creation of the vacuum into its final, closed position in which it seals interior of material container airtight.
3. Device for embodying the process according to claim 1 or 2, characterized in that cover exhibits a check valve by which interior of material container can be connected to a suction device placed externally.
4. Device according to one of claims 1 to 3, wherein cylindrical inner part of cover exhibits an outer diameter which corresponds to the diameter of front end opening
of material container and is designed as an airtight seat and the exterior of cover, is formed by a flange which, in the closed position of cover fits against the front end of material container,
5. Device according to claim 4, wherein a gasket ring is placed between cover and material container,
6. A process for the intermediate storage in movable material containers of plastics materials to be processed substantially as hereinbefore described with reference to the accompanying drawings.
7. A container for use in the process of Claim 6 substantially as hereinbefore described with reference to the accompanying drawings.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19863636807 DE3636807A1 (en) | 1986-10-29 | 1986-10-29 | METHOD FOR THE INTERIM STORAGE OF PLASTIC MATERIALS TO BE PROCESSED AND DEVICE FOR IMPLEMENTING THE METHOD |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| GB8722924D0 GB8722924D0 (en) | 1987-11-04 |
| GB2198685A true GB2198685A (en) | 1988-06-22 |
Family
ID=6312741
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08722924A Withdrawn GB2198685A (en) | 1986-10-29 | 1987-09-30 | Process for the intermediate storage of plastic material to be processed |
Country Status (3)
| Country | Link |
|---|---|
| DE (1) | DE3636807A1 (en) |
| FR (1) | FR2605985A1 (en) |
| GB (1) | GB2198685A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992022377A1 (en) | 1991-06-13 | 1992-12-23 | Verfahrenstechnik Hübers GmbH | Process for the transport and preparation of cast resin and the supply of a casting installation therewith and device for implementing the process |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2686059B1 (en) * | 1992-01-13 | 1995-04-07 | Alain Catrain | PROCESS AND DEVICE FOR VACUUM PACKAGING OF FOOD PRODUCTS. |
| DE9401446U1 (en) * | 1994-01-29 | 1994-07-07 | Steinhauser, Hermann, 87634 Obergünzburg | Device for vacuum packaging of food |
| DE19808643A1 (en) * | 1998-02-28 | 1999-09-02 | Zorembski | Storage box for cartridges partially filled with silicone fluid |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB311723A (en) * | 1928-02-15 | 1929-05-15 | Leonard Faviell Gee | Improvements in and connected with the closing or sealing of evacuated metal and other boxes or containers |
| GB1200008A (en) * | 1967-12-29 | 1970-07-29 | Du Pont | Packaging of polyamides |
| US3943987A (en) * | 1974-10-17 | 1976-03-16 | Rossi Thomas J | Reclosable air-tight containers with evacuation means |
| GB1499852A (en) * | 1975-03-04 | 1978-02-01 | Smith & Nephew Pharma | Packaging |
| US4142645A (en) * | 1978-04-12 | 1979-03-06 | Walton Donald G | Vacuum sealing closure lid for home canning operations |
| GB2019424A (en) * | 1978-04-21 | 1979-10-31 | Owens Illinois Inc | Processing polyesters to minimize acetaldehyde formation |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1070476A (en) * | 1952-07-28 | 1954-07-27 | Closing device for containers provided with a hinged lid, and method and device for closing containers provided with such a lid | |
| DE1486297A1 (en) * | 1963-08-02 | 1969-04-17 | Hans Dohse | Process for the vacuum-tight closing of containers and containers for the application of this process |
| GB1248974A (en) * | 1968-10-24 | 1971-10-06 | Bulpitt And Sons Ltd | Improvements in sealed containers |
| EP0115527A1 (en) * | 1982-08-06 | 1984-08-15 | DENZER, Alan R. | Improvements in or relating to vacuum containers |
| DE8535304U1 (en) * | 1985-12-16 | 1986-04-30 | Celik, geb. Wehr, Ursula, 5000 Köln | Vacuum container |
-
1986
- 1986-10-29 DE DE19863636807 patent/DE3636807A1/en not_active Ceased
-
1987
- 1987-09-21 FR FR8713027A patent/FR2605985A1/en active Pending
- 1987-09-30 GB GB08722924A patent/GB2198685A/en not_active Withdrawn
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB311723A (en) * | 1928-02-15 | 1929-05-15 | Leonard Faviell Gee | Improvements in and connected with the closing or sealing of evacuated metal and other boxes or containers |
| GB1200008A (en) * | 1967-12-29 | 1970-07-29 | Du Pont | Packaging of polyamides |
| US3943987A (en) * | 1974-10-17 | 1976-03-16 | Rossi Thomas J | Reclosable air-tight containers with evacuation means |
| GB1499852A (en) * | 1975-03-04 | 1978-02-01 | Smith & Nephew Pharma | Packaging |
| US4142645A (en) * | 1978-04-12 | 1979-03-06 | Walton Donald G | Vacuum sealing closure lid for home canning operations |
| GB2019424A (en) * | 1978-04-21 | 1979-10-31 | Owens Illinois Inc | Processing polyesters to minimize acetaldehyde formation |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992022377A1 (en) | 1991-06-13 | 1992-12-23 | Verfahrenstechnik Hübers GmbH | Process for the transport and preparation of cast resin and the supply of a casting installation therewith and device for implementing the process |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8722924D0 (en) | 1987-11-04 |
| DE3636807A1 (en) | 1988-05-05 |
| FR2605985A1 (en) | 1988-05-06 |
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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) |