CA2577977A1 - Device for ejecting pet preforms - Google Patents
Device for ejecting pet preforms Download PDFInfo
- Publication number
- CA2577977A1 CA2577977A1 CA002577977A CA2577977A CA2577977A1 CA 2577977 A1 CA2577977 A1 CA 2577977A1 CA 002577977 A CA002577977 A CA 002577977A CA 2577977 A CA2577977 A CA 2577977A CA 2577977 A1 CA2577977 A1 CA 2577977A1
- Authority
- CA
- Canada
- Prior art keywords
- preforms
- molding
- air
- slide rail
- ejection direction
- 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.)
- Abandoned
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
-
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/43—Removing or ejecting moulded articles using fluid under pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/25—Solid
- B29K2105/253—Preform
Abstract
An ejector is used for ejecting PET preforms (6) from an injection moulding tool. The tool comprises a clamping plate (1) to which a mould core (2) is secured. A movable stripping plate (7) is used to move a stripper strip (9), to which are secured threaded slides (10), in the ejection direction A. A yoke support (8) opens the stripper strip (9) by means of a slanted drawing finger (4). Pressurised air L is blown through air channels (11) arranged in the stripper strip (9), into the space between the mould core (2) and the preform (6) to be ejected. For that purpose, the air channels (11) are inclined to a predetermined extent relative to the ejection direction A. This ensures that even particularly large preforms (6) can be securely ejected from the tool.
Description
Device for ejecting PET Preforms The present invention concerns an ejector for an injection-molding tool for the production of PET preforms according to the preamble of claim 1.
Injection molding machines for the production of preforms, for example for the production of drinking bottles made of PET, essentially comprise an extruder unit and a forming tool unit.
When producing thick-walled preforms of the above-mentioned kind, the cycle time is mainly determined by the time necessary for the preform to become inherently stable.
In order to reduce the cycle time and, above all, the standstill periods of the plastic injection molding machines caused by the preforms' long cooling period, extraction devices for taking out the preforms are used more and more frequently. To this end, the molding tools are opened after the injection process and during the cooling phase respectively and the preforms which are not yet completely cooled are automatically taken up by those extraction devices and kept cooling. During this cooling period, the molding tools can be closed again and refilled.
Such an extraction device is described, for example, in WO 97/47459. In order to take up the preforms after the injection molding process has been finished, the withdrawal plate in the opened molding tool is positioned in such a way that the individual preforms can be drawn into the withdrawal plate's cavities by means of low pressure produced in the extraction device. In those cavities they continue to cool. Thus, every single preform is pulled off the mold core using this extraction device. During the cooling period of those preforms a new molding cycle has already started.
Other similar extraction devices are described in EP-0'633'119, DE-198'48'837 or US-6,391,244.
What they all have in common is that they are positioned in the desired way in the opened molding tool after the molding has been finished. In so doing, the preforms are sucked into the extraction device's cavities by the low pressure produced in this apparatus in order to continue their cooling process. However, there are different mechanisms to remove the preforms from the extraction devices' cavities after the cooling process. Some eject the cooled-down preforms using mechanical aids, while others use pressurized air to blow them out.
However, the disadvantage of these well-known extraction devices is that after the injection molding process, some preforms can easily be sucked off the mold cores into the extraction device while others remain stuck at the mold cores. This leads to an interruption of the subsequent production cycle, as the preforms remaining at the mold cores impede the production of new preforms.
US-4,438,065 shows a template with an appliance integrated into the form to remove PP
injection molding pieces from this appliance. After the molding tool has been opened, the injection molded and cup shaped container is blown out of the form using a jet of pressurized air. This molding tool is used in connection with the production of cup shaped PP forms and therefore is not suited for PET molding tools for preforms used for the production of drinking bottles made of PET.
Moreover it can be shown that while producing thin-walled preforms, there is no need for additional cooling in the extraction device. For this reason, it is now common practice to equip each mold core with a device enabling the preforms to be dislodged securely from the mold cores, irrespective of a separate extraction device being there or not.
In particular, molding tools have now been created that are equipped with a mechanical stripping aid.
Furthermore, there are also molding tools for the production of PET preforms whose molding cores are equipped with air jets to blow the preforms off the molding core.
Unfortunately this does not guarantee the preforms' secure removal from the molding cores, especially when longer preforms are being used. The reason for this is that the air jets on those molding tools have dedicated positions within the molding core. Due to this, when dislodging the preform, the air stream becomes weaker the further away the preform is piaced from the air jet. This disadvantage makes itself felt in particular with the production of long preforms having to cover a long strip-off distance. It stands to reason that preforms left over on the molding cores are stuck and can cant within the molding tool. This, in turn, means that the molding tool cannot be closed sufficiently in the course of the next cycle, leading to leakages.
Preforms that are stuck may interrupt the entire production cycle and thus entail time-consuming and cost-intensive maintenance work. It has also been shown that these air jets can be easily over-sprayed or contaminated by oil or dust residues, which again entails time-consuming and cost-intensive maintenance works.
Therefore it is the aim of the present invention to provide a device that does not have these disadvantages. In particular, it is the aim of the present invention to create a device with which the preforms can be stripped off securely from their molding cores, irrespective of their lengths and irrespective of a separate extraction device being there or not.
Furthermore, this device should to be easy to maintain.
Injection molding machines for the production of preforms, for example for the production of drinking bottles made of PET, essentially comprise an extruder unit and a forming tool unit.
When producing thick-walled preforms of the above-mentioned kind, the cycle time is mainly determined by the time necessary for the preform to become inherently stable.
In order to reduce the cycle time and, above all, the standstill periods of the plastic injection molding machines caused by the preforms' long cooling period, extraction devices for taking out the preforms are used more and more frequently. To this end, the molding tools are opened after the injection process and during the cooling phase respectively and the preforms which are not yet completely cooled are automatically taken up by those extraction devices and kept cooling. During this cooling period, the molding tools can be closed again and refilled.
Such an extraction device is described, for example, in WO 97/47459. In order to take up the preforms after the injection molding process has been finished, the withdrawal plate in the opened molding tool is positioned in such a way that the individual preforms can be drawn into the withdrawal plate's cavities by means of low pressure produced in the extraction device. In those cavities they continue to cool. Thus, every single preform is pulled off the mold core using this extraction device. During the cooling period of those preforms a new molding cycle has already started.
Other similar extraction devices are described in EP-0'633'119, DE-198'48'837 or US-6,391,244.
What they all have in common is that they are positioned in the desired way in the opened molding tool after the molding has been finished. In so doing, the preforms are sucked into the extraction device's cavities by the low pressure produced in this apparatus in order to continue their cooling process. However, there are different mechanisms to remove the preforms from the extraction devices' cavities after the cooling process. Some eject the cooled-down preforms using mechanical aids, while others use pressurized air to blow them out.
However, the disadvantage of these well-known extraction devices is that after the injection molding process, some preforms can easily be sucked off the mold cores into the extraction device while others remain stuck at the mold cores. This leads to an interruption of the subsequent production cycle, as the preforms remaining at the mold cores impede the production of new preforms.
US-4,438,065 shows a template with an appliance integrated into the form to remove PP
injection molding pieces from this appliance. After the molding tool has been opened, the injection molded and cup shaped container is blown out of the form using a jet of pressurized air. This molding tool is used in connection with the production of cup shaped PP forms and therefore is not suited for PET molding tools for preforms used for the production of drinking bottles made of PET.
Moreover it can be shown that while producing thin-walled preforms, there is no need for additional cooling in the extraction device. For this reason, it is now common practice to equip each mold core with a device enabling the preforms to be dislodged securely from the mold cores, irrespective of a separate extraction device being there or not.
In particular, molding tools have now been created that are equipped with a mechanical stripping aid.
Furthermore, there are also molding tools for the production of PET preforms whose molding cores are equipped with air jets to blow the preforms off the molding core.
Unfortunately this does not guarantee the preforms' secure removal from the molding cores, especially when longer preforms are being used. The reason for this is that the air jets on those molding tools have dedicated positions within the molding core. Due to this, when dislodging the preform, the air stream becomes weaker the further away the preform is piaced from the air jet. This disadvantage makes itself felt in particular with the production of long preforms having to cover a long strip-off distance. It stands to reason that preforms left over on the molding cores are stuck and can cant within the molding tool. This, in turn, means that the molding tool cannot be closed sufficiently in the course of the next cycle, leading to leakages.
Preforms that are stuck may interrupt the entire production cycle and thus entail time-consuming and cost-intensive maintenance work. It has also been shown that these air jets can be easily over-sprayed or contaminated by oil or dust residues, which again entails time-consuming and cost-intensive maintenance works.
Therefore it is the aim of the present invention to provide a device that does not have these disadvantages. In particular, it is the aim of the present invention to create a device with which the preforms can be stripped off securely from their molding cores, irrespective of their lengths and irrespective of a separate extraction device being there or not.
Furthermore, this device should to be easy to maintain.
According to the invention, this is achieved using an ejector according to claim 1, and in particular using a device having at least one air duct arranged in the molding tool's slide rail.
The device for ejecting the PET preforms essentially comprises a slide rail with at least one air duct. Threaded slides are fixed to this slide rail.
This slide rail is part of a known molding tool with a clamping plate for a molding core, as well as a movable stripping plate. In its basic position, the stripping plate lies flat on the mold clamping plate, as is usual with such devices. The slide rail fixes the preform at the thread. If the stripping plate is moved away from the mold clamping plate, the preform is loosened off the molding core as well, given that the slide rails go along with the stripping plate's movements and fix the preform at this particular moment. The stripping plate continues to extend, the length of its ejecting stroke being adapted to the preform length.
Before the maximum ejecting stroke is reached, a pressurized puff of air is applied to the preform via the air ducts positioned in the slide rail, blowing the preform off the molding core. As the air ducts are in the slide rail, they move along with the slide rail. As the air stream is introduced at a non-varying angle to the molding core and at a non-varying distance to the preform, it is ensured that the preforms are ejected steadily, irrespective of their contours. Thus the air impulse is effective independently of the preform's length and contour and proves to be extremely efficient at removing the preform from the molding core.
The benefits of the inventive device are easy to see for the expert, the main advantage being the ensuring of the reliable ejection of the preforms. Another advantage of the device is that it is very economic, because the flight curve of the preforms from the molding tool can be adjusted by adjusting the duration of the puff of pressurized air. This, in turn, reduces air consumption. Moreover, it is clear that neither oil nor dust can enter the air ducts.
In a preferred embodiment, the air ducts in the slide rail are positioned in such a way that the air impulses impinge on the molding core at an angle of approx. 35 . It is clear that there may be several air ducts arranged in the slide rail and that these may have differing angles to the ejection direction.
Alternatively, the molding core's outer contours can be coated with a special suitable anti-stick coating.
The device for ejecting the PET preforms essentially comprises a slide rail with at least one air duct. Threaded slides are fixed to this slide rail.
This slide rail is part of a known molding tool with a clamping plate for a molding core, as well as a movable stripping plate. In its basic position, the stripping plate lies flat on the mold clamping plate, as is usual with such devices. The slide rail fixes the preform at the thread. If the stripping plate is moved away from the mold clamping plate, the preform is loosened off the molding core as well, given that the slide rails go along with the stripping plate's movements and fix the preform at this particular moment. The stripping plate continues to extend, the length of its ejecting stroke being adapted to the preform length.
Before the maximum ejecting stroke is reached, a pressurized puff of air is applied to the preform via the air ducts positioned in the slide rail, blowing the preform off the molding core. As the air ducts are in the slide rail, they move along with the slide rail. As the air stream is introduced at a non-varying angle to the molding core and at a non-varying distance to the preform, it is ensured that the preforms are ejected steadily, irrespective of their contours. Thus the air impulse is effective independently of the preform's length and contour and proves to be extremely efficient at removing the preform from the molding core.
The benefits of the inventive device are easy to see for the expert, the main advantage being the ensuring of the reliable ejection of the preforms. Another advantage of the device is that it is very economic, because the flight curve of the preforms from the molding tool can be adjusted by adjusting the duration of the puff of pressurized air. This, in turn, reduces air consumption. Moreover, it is clear that neither oil nor dust can enter the air ducts.
In a preferred embodiment, the air ducts in the slide rail are positioned in such a way that the air impulses impinge on the molding core at an angle of approx. 35 . It is clear that there may be several air ducts arranged in the slide rail and that these may have differing angles to the ejection direction.
Alternatively, the molding core's outer contours can be coated with a special suitable anti-stick coating.
In the following, the present invention shall be described in detail by way of example and by means of the illustrations. The illustrations show:
Fig. 1 A longitudinal section through a mold template with an ejector according to the invention for the stripping off of preforms directly after the opening of the molding tool.
Fig. 2 A longitudinal section through a mold template with an ejector according to the invention for the stripping off of preforms in a first ejection position.
Fig. 3 A longitudinal section through a mold template with an ejector according to the invention for the stripping off of preforms in a second ejection position.
The setup of the inventive device for the ejection of preforms according to the invention can be seen in Fig. 1. The freshly produced preform (6) still sits solidly on the molding core (2).
The molding tool has just been opened. The device for ejecting the preform (6) is still in its basic position. The molding tool has a clamping plate (1) for a molding core (2). A movable stripping plate (7) can be moved in the direction of the molding core and carries along a yoke support (8) that moves a slide rail (9) with threaded slides (10) fixed to it using a slanted drawing finger (4). According to the invention, the slide rail (9) has at least one air duct (11).
Fastening means (5) secure the slanted drawing finger (4) to the mold clamping plate (1).
The slant surfaces (12) of the yoke support (8) and the slant surfaces (13) of the slanted drawing finger (4) are used for the lateral opening of the slide rails (9).
According to the invention, the device for the ejection of preforms can be operated using a hydraulic device, for example. In so doing the slide rail (9) is moved together with the threaded slide (10) in the ejection direction A. The air ducts (11) arranged in the slide rail (9) are crucial for ejecting the preforms.
Fig. 2 shows the ejector according to the invention in a first ejecting position. In the ejecting position shown here, the stripping plate (7) is distanced from the clamping plate (1) by an ejecting stroke a. The illustration shows that the air ducts (11) are freed by this first movement in the ejection direction in order to blow pressurized air directed in between the mold core (2) and the preform (6) in the next step. At this point in time, the slide rails (9) and the threaded slide (10) are only slightly open. The mechanisms needed for this procedure are well known to the expert and are therefore not subject of this invention.
As is described in Fig. 3, the stripping plate (7) is moved further away from the mold-clamping plate (1) in another step and this moves the yoke supports (8) outwards due to the corresponding slant surfaces (12,13) of the slanted drawing finger (4) and the yoke support (8). As a result, opening stroke a is extended and the slide rails (9) and the threaded slides 5 (10) are opened further. In this process, the preform (6) is completely freed. While the slide rail (9) is opened, pressurized air (L) is blown out through at least one air duct (11) until the stripping plate (7) has reached the maximum ejection stroke d or the threaded slides (10) are opened up to their full extent. According to the invention, the air ducts (11) are arranged in the slide rail (9) and are inclined at an angle a with respect to the ejection direction A. This ensures that a targeted air stream can also be blown in an opened state between the mold core (2) and the preform (6). It is clear that the angle a can be varied depending on the mold core length. It is preferable if this angle a is inferior to 45 . A
universally well proven angle a is approx 35 to the ejection direction A.
In a preferred development of the inventive ejector device, the slide rail (9) has several air ducts (11) with advantageously differing angles facing the ejection direction.
It is clear that the mold core (2) can be fitted with an anti-stick coating on the outside.
Fig. 1 A longitudinal section through a mold template with an ejector according to the invention for the stripping off of preforms directly after the opening of the molding tool.
Fig. 2 A longitudinal section through a mold template with an ejector according to the invention for the stripping off of preforms in a first ejection position.
Fig. 3 A longitudinal section through a mold template with an ejector according to the invention for the stripping off of preforms in a second ejection position.
The setup of the inventive device for the ejection of preforms according to the invention can be seen in Fig. 1. The freshly produced preform (6) still sits solidly on the molding core (2).
The molding tool has just been opened. The device for ejecting the preform (6) is still in its basic position. The molding tool has a clamping plate (1) for a molding core (2). A movable stripping plate (7) can be moved in the direction of the molding core and carries along a yoke support (8) that moves a slide rail (9) with threaded slides (10) fixed to it using a slanted drawing finger (4). According to the invention, the slide rail (9) has at least one air duct (11).
Fastening means (5) secure the slanted drawing finger (4) to the mold clamping plate (1).
The slant surfaces (12) of the yoke support (8) and the slant surfaces (13) of the slanted drawing finger (4) are used for the lateral opening of the slide rails (9).
According to the invention, the device for the ejection of preforms can be operated using a hydraulic device, for example. In so doing the slide rail (9) is moved together with the threaded slide (10) in the ejection direction A. The air ducts (11) arranged in the slide rail (9) are crucial for ejecting the preforms.
Fig. 2 shows the ejector according to the invention in a first ejecting position. In the ejecting position shown here, the stripping plate (7) is distanced from the clamping plate (1) by an ejecting stroke a. The illustration shows that the air ducts (11) are freed by this first movement in the ejection direction in order to blow pressurized air directed in between the mold core (2) and the preform (6) in the next step. At this point in time, the slide rails (9) and the threaded slide (10) are only slightly open. The mechanisms needed for this procedure are well known to the expert and are therefore not subject of this invention.
As is described in Fig. 3, the stripping plate (7) is moved further away from the mold-clamping plate (1) in another step and this moves the yoke supports (8) outwards due to the corresponding slant surfaces (12,13) of the slanted drawing finger (4) and the yoke support (8). As a result, opening stroke a is extended and the slide rails (9) and the threaded slides 5 (10) are opened further. In this process, the preform (6) is completely freed. While the slide rail (9) is opened, pressurized air (L) is blown out through at least one air duct (11) until the stripping plate (7) has reached the maximum ejection stroke d or the threaded slides (10) are opened up to their full extent. According to the invention, the air ducts (11) are arranged in the slide rail (9) and are inclined at an angle a with respect to the ejection direction A. This ensures that a targeted air stream can also be blown in an opened state between the mold core (2) and the preform (6). It is clear that the angle a can be varied depending on the mold core length. It is preferable if this angle a is inferior to 45 . A
universally well proven angle a is approx 35 to the ejection direction A.
In a preferred development of the inventive ejector device, the slide rail (9) has several air ducts (11) with advantageously differing angles facing the ejection direction.
It is clear that the mold core (2) can be fitted with an anti-stick coating on the outside.
Claims (8)
1. Ejector for an injection molding tool for the production of PET preforms (6) comprising a clamping plate (1) for a molding core (2), a movable stripping plate (7), a slide rail (9) with threaded slides (10) fixed thereto as well as an air duct (11), characterized in that the air duct (11) is arranged in the slide rail (9).
2. Ejector according to claim 1, characterized in that several air ducts (11) are arranged in the slide rail (9).
3. Ejector according to claim 1, characterized in that the air duct (11) has a
4. Ejector according to claim 3, characterized in that the air duct (11) is at an angle a of 35° to the ejection direction A.
5. Ejector according to claim 2, characterized in that each of said air ducts are at an angle a of less than 45° to the ejection direction A.
6. Ejector according to claim 5, characterized in that each of said air ducts (11) are at an angle a of 35° to the ejection direction.
7. Ejector according to claim 5, characterized in that the air ducts (11) are at differing angles a to the ejection direction A.
8. Ejector according to one of the claims 1 to 3, characterized in that the mold core (2) is provided with an anti-stick coating on its outside.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1606/04 | 2004-10-01 | ||
| CH16062004 | 2004-10-01 | ||
| PCT/CH2005/000573 WO2006037249A1 (en) | 2004-10-01 | 2005-10-03 | Device for ejecting pet preforms |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2577977A1 true CA2577977A1 (en) | 2006-04-13 |
Family
ID=35355775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002577977A Abandoned CA2577977A1 (en) | 2004-10-01 | 2005-10-03 | Device for ejecting pet preforms |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP1793974A1 (en) |
| CA (1) | CA2577977A1 (en) |
| WO (1) | WO2006037249A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138103A1 (en) * | 2007-05-16 | 2008-11-20 | Husky Injection Molding Systems Ltd. | Air ring for a stripper assembly |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102007046379A1 (en) * | 2007-09-27 | 2009-04-02 | Novatex Gesellschaft mit beschränkter Haftung Gummi- und Plastikwaren | Method and device for producing a shaped body |
| BR112013009160A2 (en) | 2010-10-26 | 2018-05-02 | Husky Injection Molding Systems Ltd | a stack of mold for a preform |
| CN102358003B (en) * | 2011-07-29 | 2013-11-06 | 宁波双林模具有限公司 | Rotary core loosing and demoulding device for transverse thread slug of injection mold |
| US9254598B2 (en) * | 2012-03-29 | 2016-02-09 | Husky Infection Molding Systems Ltd. | Mold stack having an air valve |
| CN103395177B (en) * | 2013-08-20 | 2016-01-13 | 成都市联余精密机械有限公司 | The air blowing assisted demoulding system of PP and PET bottle bottle base |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4438065A (en) * | 1982-03-08 | 1984-03-20 | Husky Injection Molding Systems Ltd. | Air ejection of molded containers |
| JPH07148792A (en) * | 1993-11-30 | 1995-06-13 | Sekisui Chem Co Ltd | Injection mold |
| US5736173A (en) * | 1996-04-24 | 1998-04-07 | Zygo Mold Limited | Preform injection mould with slide taper locks |
| JPH1076566A (en) * | 1996-09-05 | 1998-03-24 | Aokiko Kenkyusho:Kk | Molding of inner screw of neck part in preform |
| MXPA05000571A (en) * | 2002-07-12 | 2005-04-28 | West Pharm Serv Inc | Method for making plastic overcaps using hot runner back-gated mold technology. |
| JP4115254B2 (en) * | 2002-11-15 | 2008-07-09 | 北海製罐株式会社 | Preform take-out and transfer device in injection molding machine |
| CA2515142C (en) * | 2003-02-03 | 2009-04-28 | Otto Hofstetter | Hydraulic system for a slide |
| DE10355018B4 (en) * | 2003-11-25 | 2011-06-22 | MHT Mold & Hotrunner Technology AG, 65239 | Cavity structure |
-
2005
- 2005-10-03 CA CA002577977A patent/CA2577977A1/en not_active Abandoned
- 2005-10-03 WO PCT/CH2005/000573 patent/WO2006037249A1/en not_active Application Discontinuation
- 2005-10-03 EP EP05784173A patent/EP1793974A1/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2008138103A1 (en) * | 2007-05-16 | 2008-11-20 | Husky Injection Molding Systems Ltd. | Air ring for a stripper assembly |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2006037249A1 (en) | 2006-04-13 |
| EP1793974A1 (en) | 2007-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2577977A1 (en) | Device for ejecting pet preforms | |
| US7261853B2 (en) | Decelerated ejector pin system and method for operating the same | |
| US6214275B1 (en) | Injection nozzle and method for injection molding | |
| US5421717A (en) | Apparatus for forming threaded molded articles | |
| KR102086425B1 (en) | Injection runner automatic separation system | |
| WO1994016871A1 (en) | Method and apparatus for manufacturing hollow objects, in particular plastic preforms | |
| CN111906991A (en) | Injection mold with protection architecture | |
| CN111715862B (en) | Method for producing die casting | |
| CN204844652U (en) | Forming device is moulded to bubble | |
| CA2068258A1 (en) | Molded bottle removal apparatus and method | |
| US5932164A (en) | Process for injection molding with incremental initial ejection | |
| CN211279555U (en) | Automatic demolding mold | |
| KR20110112038A (en) | Freeform fetch unit of injection molding machines | |
| CN109955440B (en) | Demolding device, injection mold and demolding method of injection molding workpiece | |
| KR20060046158A (en) | Device for the injection moulding of moulded bodies made from plastic | |
| CN207889052U (en) | A kind of straight backform tool | |
| CN108081549A (en) | A kind of side is recessed to draw injection forming mold and its method of work | |
| CN206367155U (en) | Inject mould in a kind of tool box | |
| CN220883258U (en) | Injection mold easy to take out | |
| CN215550550U (en) | Injection mold convenient to drawing of patterns | |
| CN219634424U (en) | Mould device convenient to drawing of patterns | |
| CN219256359U (en) | Injection molding drawing of patterns frock structure | |
| CN219095808U (en) | Injection molding device for automobile glass support | |
| JP2013198999A (en) | Apparatus and method for manufacturing resin container | |
| CN217319180U (en) | Injection molding mold for electronic cigarette parts |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Discontinued |