CN108748921B - High-precision injection molding production equipment and production process thereof - Google Patents
High-precision injection molding production equipment and production process thereof Download PDFInfo
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- CN108748921B CN108748921B CN201810876826.2A CN201810876826A CN108748921B CN 108748921 B CN108748921 B CN 108748921B CN 201810876826 A CN201810876826 A CN 201810876826A CN 108748921 B CN108748921 B CN 108748921B
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- opening
- transition channel
- conveying shell
- transport casing
- heating
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- 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
- B29C45/46—Means for plasticising or homogenising the moulding material or forcing it into the mould
- B29C45/57—Exerting after-pressure on the moulding material
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- 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
- B29C45/72—Heating or cooling
Abstract
The invention relates to the field of injection molding, in particular to high-precision injection molding production equipment and a production process thereof. The utility model provides a high accuracy injection molding production facility, including feed arrangement and forming device, feed arrangement includes the transport casing of hollow cylinder form, be located transport casing inside and along transport casing length direction's conveyor screw and be located the drive motor that the transport casing outside links to each other with conveyor screw one end, the one end that drive motor was kept away from to the transport casing is equipped with the transition passageway of connecting transport casing inside and forming device, be equipped with the board that opens and shuts that can open and close between transition passageway and the transport casing, the outside of transport casing and transition passageway all is equipped with heating element, the downside of transition passageway is equipped with the discharge gate, the discharge gate is equipped with the manual valve that the discharge gate was opened and close in the control. The raw materials can enter the transition channel after being preliminarily melted in the conveying shell, and the heating assembly continuously heats to reach the temperature requirement of injection molding, so that defective products caused by the fact that the temperature cannot be reached are avoided.
Description
Technical Field
The invention relates to the field of injection molding, in particular to high-precision injection molding production equipment and a production process thereof.
Background
When the traditional injection molding piece is produced, the plastic is heated to be melted, and the melted plastic is pushed out by the screw rod conveying mechanism and enters a molding cavity of a mold for molding.
However, the injection molding production equipment in the prior art has the following problems: the feed inlet of raw materials is generally located the upside of screw conveyor, can not clear up the remaining plastics in the screw conveyor after the work of one day finishes, therefore will have some clouts to remain to the next day. The molten plastic is re-solidified after being cooled for one night, and when the plastic is started the next day, the raw materials are just melted and can enter the cavity when the raw materials do not reach the proper injection molding temperature, so that defective products are easy to appear in the previous batches.
Disclosure of Invention
In view of the defects in the prior art, one of the objects of the present invention is to provide a high precision injection molding production apparatus, which is advantageous in that it can avoid the phenomenon that inferior products are easy to occur when the machine is just started.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a high accuracy injection molding production facility, includes feed arrangement and forming device, feed arrangement includes the transport casing of hollow cylinder form, is located transport casing inside and along transport casing length direction's conveyor screw and is located the conveyor casing outside and the continuous driving motor of conveyor screw one end, the one end that the driving motor was kept away from to the conveyor casing is equipped with the transition passageway of connecting transport casing inside and forming device, be equipped with the board that opens and shuts that can open and close between transition passageway and the conveyor casing, the outside of conveyor casing and transition passageway all is equipped with heating element, the downside of transition passageway is equipped with the discharge gate, the discharge gate is equipped with the manual valve that the discharge gate was opened and close in the control.
Through adopting above-mentioned technical scheme, set up transition channel between carrying casing and forming device to carry out temperature regulation through the mode of multistage heating, the control of temperature can be more accurate. And after the processing is finished, the manual valve is opened, so that redundant raw materials are discharged from the manual valve and enter the material receiving disc. When the first processing in the next day, the manual valve is closed, and the piston rod of the opening and closing cylinder contracts, so that the transition channel is communicated with the conveying shell again. The raw materials can enter the transition channel after being initially melted in the conveying shell, and the temperature requirement of injection molding is achieved by continuously heating the raw materials through the heating assembly in the conveying process in the transition shell, so that defective products caused by the fact that the temperature cannot be achieved are avoided.
The invention is further configured to: and a material storage box communicated with the interior of the conveying shell is arranged on the upper side of one end, close to the driving motor, of the conveying shell.
Through adopting above-mentioned technical scheme, because the storage case is connected at the transport casing upside, when the material in the transport casing was carried away, the material in the storage case can be filled into in the transport casing under the effect of dead weight.
The invention is further configured to: the heating assembly comprises a first heating assembly, a second heating assembly and a third heating assembly, wherein the first heating assembly and the second heating assembly are arranged outside the conveying shell, and the third heating assembly is arranged outside the transition channel; the first heating assembly is located at one end close to the driving motor, the heating temperature of the first heating assembly is lower than the melting temperature of the plastic, and the heating temperatures of the second heating assembly and the third heating assembly are higher than the melting temperature of the plastic.
Through adopting above-mentioned technical scheme, make the raw materials of storage case feed inlet department can not melt through three section heating device's control, avoid the raw materials that melts to cool off and solidify into and influence the feeding after one.
The invention is further configured to: the side face of the connecting end of the conveying shell and the transition channel is provided with a mounting frame, the mounting frame is provided with an opening and closing cylinder, and the opening and closing plate is connected with a piston rod of the opening and closing cylinder; when the piston rod of the opening and closing cylinder is completely extended out, the opening and closing plate closes the joint of the conveying shell and the transition channel; when the piston rod of the opening and closing cylinder is retracted, the opening and closing plate is separated from the joint of the conveying shell and the transition channel.
By adopting the technical scheme, the opening and closing actions are realized by controlling the expansion and contraction of the opening and closing plate through the opening and closing cylinder.
The invention is further configured to: when the transition channel is closed by the opening and closing plate, an air outlet hole is formed in the position, opposite to the transition channel, of the opening and closing plate, an air inlet hole communicated with the air outlet hole is formed in the upper side face of the opening and closing plate, an air supply pipe is connected to the air inlet hole, and a control valve for controlling the opening and closing of the air supply pipe is arranged on the air supply pipe.
Through adopting above-mentioned technical scheme, in will compressing air carries the entering transition passageway through the inlet port through the air supply pipe air feed, extrude the discharge through atmospheric pressure with the raw materials that melts.
The invention is further configured to: a detection block is arranged on the side surface of the opening and closing plate, a proximity switch is arranged on the mounting frame, and the detection block is opposite to the proximity switch when the piston rod is completely extended out; the control valve is opened when the proximity switch responds, and the control valve is closed when the proximity switch does not respond.
Through adopting above-mentioned technical scheme, come the proximity switch to detect through detecting the piece and judge whether to close the board. When the opening and closing plate is in a closed state, the control valve is opened, and when the opening and closing plate is in an open state, the control valve is closed.
The invention is further configured to: the transition channel is obliquely arranged and the connecting end of the transition channel and the conveying shell is a higher end.
Through adopting above-mentioned technical scheme, set up transition channel and make the raw materials get into in the forming device more easily from carrying the casing toward forming device tilt down.
The invention is further configured to: and a receiving tray is arranged below the discharge port.
Through adopting above-mentioned technical scheme, retrieve from discharge gate exhaust raw materials through take-up (stock) pan.
The invention is further configured to: the inner part of the receiving disc is divided into a plurality of small areas, a top rod penetrates through the bottom of each small area, a chassis connected with all the top rods is arranged at the lower end of each top rod, and a spring is arranged between the chassis and the receiving disc; when the spring is in a normal state, the upper end surface of the ejector rod is flush with the inner bottom surface of the material receiving disc.
By adopting the technical scheme, the melted materials are separated by a plurality of small areas when entering the receiving tray. The material in each interval is solidified into a solid state after being cooled. At this time, the material receiving disc is pressed downwards to enable the solidified material to be ejected out by the ejector rod, so that the material can be recovered in a state of a small block, and the material can be placed into the material storage box without extra processing to be used as raw materials.
Another object of the invention is to provide a process for the production of high-precision injection-molded parts using the above-mentioned apparatus.
The invention provides the following technical scheme: a process for producing high-precision injection-molded parts by using the production equipment comprises the following steps:
A. preparing materials: mixing the raw materials according to a certain proportion, and uniformly stirring;
B. melting and plasticizing: putting the prepared raw materials into a storage box, and heating the raw materials to a required temperature in a multi-stage manner through a first heating assembly, a second heating assembly and a third heating assembly;
C. pressure injection: injecting the molten raw materials into a mold cavity through an injection device under certain pressure and speed for the raw materials in a molten state;
D. filling a mold and cooling: after the mold cavity is filled with the molten raw materials, keeping a certain pressure to wait for the molten raw materials to be cooled and solidified;
E. and (3) top die taking: and opening the die after complete cooling, and ejecting the product by using a die ejecting mechanism.
Through adopting above-mentioned technical scheme, use this production facility to produce the working of plastics through above-mentioned scheme.
In conclusion, the invention has the following beneficial effects:
1. the raw materials can enter the transition channel after being initially melted in the conveying shell, and the raw materials are continuously heated by the heating assembly to reach the temperature requirement of injection molding in the conveying process in the transition shell, so that defective products caused by the fact that the temperature cannot be reached are avoided;
2. compressed air is conveyed into the transition channel through the air inlet hole by air supply of the air supply pipe, and melted raw materials are extruded and discharged through air pressure, so that a large amount of raw materials are prevented from remaining in the transition channel.
Drawings
FIG. 1 is a schematic structural view of an embodiment;
FIG. 2 is a schematic cross-sectional view of an embodiment;
FIG. 3 is an enlarged view at A in FIG. 2;
fig. 4 is an enlarged view at B in fig. 1.
Reference numerals: 1. a feeding device; 2. a molding device; 3. a transport housing; 4. a conveying screw; 5. a drive motor; 6. a material storage box; 7. a first heating assembly; 8. a second heating assembly; 9. a transition passage; 10. a mounting frame; 11. opening and closing the air cylinder; 12. a shutter plate; 13. an air outlet; 14. an air inlet; 15. a gas supply pipe; 16. a control valve; 17. a detection block; 18. a proximity switch; 19. a discharge port; 20. a manual valve; 21. a take-up pan; 22. a top rod; 23. a chassis; 24. a spring; 25. and a third heating assembly.
Detailed Description
The invention is further illustrated with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in figure 1, the high-precision injection molding production equipment comprises a feeding device 1 and a molding device 2, raw materials are conveyed into the molding device 2 through the feeding device 1, and products are produced according to the shape of a mold cavity inside the molding device 2.
As shown in fig. 2, the feeding device 1 includes a hollow cylindrical conveying housing 3, a conveying screw 4 is installed inside the conveying housing 3 along the length direction of the conveying housing 3, one end of the conveying screw 4 is connected to a driving motor 5 located outside the conveying housing 3, and the driving motor 5 drives the conveying screw 4 to rotate. The upper side of the end, close to the driving motor 5, of the conveying shell 3 is provided with a storage box 6 communicated with the inside of the conveying shell 3, and raw materials in the storage box 6 enter the conveying shell 3 under the action of gravity. The outside of conveying shell 3 is installed first heating element 7 and second heating element 8, and first heating element 7 is located the one end that is close to driving motor 5, and second heating element 8 is located the one end of keeping away from driving motor 5. The first heating unit 7 and the second heating unit 8 may be heating wires that are mounted on the outer side of the conveying casing 3 in a covering manner, or other heating units may be selected. The first heating assembly 7 and the second heating assembly 8 can be controlled separately so that the first heating assembly 7 and the second heating assembly 8 can reach different heating temperatures.
As shown in fig. 2 and fig. 3, a transition passage 9 communicated with the inside of the conveying shell 3 is welded at one end of the conveying shell 3 far away from the driving motor 5, and the transition passage 9 is connected to the middle of the end surface of the conveying shell 3 and has a diameter smaller than that of the conveying shell 3. The third heating element 25 is installed in the outside of transition passageway 9 and heats the raw materials in transition passageway 9, avoids its temperature to hang down and can't reach the requirement of moulding plastics. The other end of the transition channel 9 inclines downwards and is connected with the forming device 2, and after the melted raw materials are conveyed into the transition channel 9 from the conveying shell 3, the raw materials are conveyed into the forming device 2 for forming by taking the transition channel 9 as a transfer. The upper side of carrying casing 3 and transition channel 9 link installs mounting bracket 10, installs on mounting bracket 10 and opens and close cylinder 11, is connected with the board 12 that opens and shuts that stretches into in carrying casing 3 on the piston rod of opening and close cylinder 11. The opening and closing plate 12 is attached to the end face of the inner side of the conveying shell 3, and the width of the opening and closing plate 12 is larger than the diameter of the transition channel 9. When the piston rod is completely retracted into the opening and closing cylinder 11, the opening and closing plate 12 is positioned above the joint of the conveying shell 3 and the transition channel 9; when the piston rod is fully extended, the shutter plate 12 closes the junction of the delivery housing 3 and the transition channel 9. When the opening and closing plate 12 closes the transition channel 9, an air outlet hole 13 is formed in the position, opposite to the transition channel 9, of the opening and closing plate 12, an air inlet hole 14 is formed in the upper side face of the opening and closing plate 12 and communicated with the air outlet hole 13, the air inlet hole 14 is connected with an air supply pipe 15, and a control valve 16 is installed on the air supply pipe 15. The side of the opening and closing plate 12 is integrally formed with a detection block 17, and the mounting frame 10 is provided with a proximity switch 18. The proximity switch 18 is opposite to the detection block 17 and responds when the piston rod is fully extended, at which time the control valve 16 is opened; when the proximity switch 18 does not respond, the control valve 16 closes and the gas supply stops.
As shown in fig. 4, a discharge port 19 is formed at the lower side of the lower end of the transition passage 9, and a manual valve 20 is installed on the discharge port 19, so that the opening and closing of the discharge port 19 can be manually controlled. A receiving tray 21 is attached below the discharge port 19, and the receiving tray 21 is partitioned into a plurality of cells. The bottom of each small interval is penetrated with a top rod 22, the lower end of the top rod 22 is connected with the same chassis 23, and a spring 24 is connected between the chassis 23 and the receiving tray 21. When the spring 24 is in a normal state, the upper end surface of the ejector rod 22 is flush with the inner bottom surface of the take-up tray 21.
The specific working process is as follows:
the heating temperature of the first heating assembly 7 is set to be slightly lower than the melting temperature of the plastic, and the temperature of the second heating assembly 8 is set to be higher than the melting temperature of the plastic. The raw material enters the conveying shell 3 from the storage box 6, and the raw material entering the conveying shell 3 is heated in the range of the first heating assembly 7 and is pushed by the screw to be conveyed forwards. When the material reaches the area of the second heating element 8, it melts and continues to be conveyed onwards through the transition duct 9 into the forming device 2.
The piston rod of the opening and closing cylinder 11 extends out when the last batch before work is processed, so that the joint of the transition channel 9 and the conveying shell 3 is sealed by the opening and closing plate 12, the control valve 16 is opened at this time, the air supply pipe 15 conveys compressed air into the transition channel 9, and at this time, raw materials enter the forming device 2 along the transition channel 9 through air pressure. After the parts are molded, excessive raw materials are remained in the transition passage 9, and at the moment, the manual valve 20 is opened, so that the excessive raw materials are discharged from the manual valve 20 into the receiving tray 21.
When the first machining in the next day, the manual valve 20 is closed, and the piston rod of the opening and closing cylinder 11 is contracted, so that the transition passage 9 is communicated with the conveying shell 3 again. The raw materials can enter the transition channel 9 after being initially melted in the conveying shell 3, and the temperature requirement of injection molding can be achieved by continuously heating through the third heating component 25 in the conveying process in the transition shell, so that defective products caused by temperature failure are avoided.
Example two;
a production process for producing high-precision injection-molded parts by using the equipment comprises the following steps:
A. preparing materials: mixing the raw materials according to a certain proportion, and uniformly stirring;
B. melting and plasticizing: the prepared raw materials are put into a storage box 6 and are heated in multiple stages through a first heating component 7, a second heating component 8 and a third heating component 25 to reach the required temperature;
C. pressure injection: injecting the molten raw materials into a mold cavity through an injection device under certain pressure and speed for the raw materials in a molten state;
D. filling a mold and cooling: after the mold cavity is filled with the molten raw materials, keeping a certain pressure to wait for the molten raw materials to be cooled and solidified;
E. and (3) top die taking: and opening the die after complete cooling, and ejecting the product by using a die ejecting mechanism.
The directions given in the present embodiment are merely for convenience of describing positional relationships between the respective members and the relationship of fitting with each other. The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment without inventive contribution as needed after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (7)
1. The utility model provides a high accuracy injection molding production facility, includes feed arrangement (1) and forming device (2), feed arrangement (1) is including hollow cylinder form transport casing (3), be located transport casing (3) inside and along transport casing (3) length direction's conveyor screw (4) and be located the drive motor (5) that the transport casing (3) outside links to each other with conveyor screw (4) one end, characterized by: one end, far away from the driving motor (5), of the conveying shell (3) is provided with a transition channel (9) which is connected with the interior of the conveying shell (3) and the forming device (2), a starting and closing plate (12) which can be started and closed is arranged between the transition channel (9) and the conveying shell (3), the outer sides of the conveying shell (3) and the transition channel (9) are respectively provided with a heating assembly, the lower side of the transition channel (9) is provided with a discharge hole (19), and the discharge hole (19) is provided with a manual valve (20) which controls the starting and closing of the discharge hole (19); an installation frame (10) is arranged on the side face of the connecting end of the conveying shell (3) and the transition channel (9), an opening and closing cylinder (11) is arranged on the installation frame (10), and the opening and closing plate (12) is connected with a piston rod of the opening and closing cylinder (11); when a piston rod of the opening and closing cylinder (11) is completely extended out, the opening and closing plate (12) closes the joint of the conveying shell (3) and the transition channel (9); when a piston rod of the opening and closing cylinder (11) is retracted, the opening and closing plate (12) leaves the joint of the conveying shell (3) and the transition channel (9); when the transition channel (9) is closed by the opening and closing plate (12), an air outlet hole (13) is formed in the position, opposite to the transition channel (9), of the opening and closing plate (12), an air inlet hole (14) communicated with the air outlet hole (13) is formed in the upper side face of the opening and closing plate (12), an air supply pipe (15) is connected to the air inlet hole (14), and a control valve (16) for controlling the opening and closing of the air supply pipe (15) is arranged on the air supply pipe (15).
2. The apparatus for producing highly precise injection molded parts as claimed in claim 1, wherein: and a material storage box (6) communicated with the interior of the conveying shell (3) is arranged on the upper side of one end, close to the driving motor (5), of the conveying shell (3).
3. The apparatus for producing highly precise injection molded parts as claimed in claim 2, wherein: the heating assemblies comprise a first heating assembly (7) arranged outside the conveying shell (3), a second heating assembly (8) and a third heating assembly (25) arranged outside the transition channel (9); the first heating component (7) is positioned at one end close to the driving motor (5), the heating temperature of the first heating component (7) is lower than the melting temperature of the plastic, and the heating temperatures of the second heating component (8) and the third heating component (25) are higher than the melting temperature of the plastic.
4. The apparatus for producing highly precise injection molded parts as claimed in claim 1, wherein: a detection block (17) is arranged on the side surface of the opening and closing plate (12), a proximity switch (18) is arranged on the mounting frame (10), and the detection block (17) is opposite to the proximity switch (18) when the piston rod is completely extended out; the control valve (16) is open when the proximity switch (18) responds, and the control valve (16) is closed when the proximity switch (18) does not respond.
5. The apparatus for producing highly precise injection molded parts as set forth in claim 4, wherein: the transition channel (9) is obliquely arranged and the connecting end with the conveying shell (3) is a higher end.
6. The apparatus for producing highly precise injection molded parts as claimed in claim 1, wherein: a receiving disc (21) is arranged below the discharge hole (19).
7. The apparatus for producing highly precise injection molded parts as claimed in claim 6, wherein: the interior of the material receiving disc (21) is divided into a plurality of small areas, a top rod (22) penetrates through the bottom of each small area, a bottom disc (23) connected with all the top rods (22) is arranged at the lower end of each top rod (22), and a spring (24) is arranged between each bottom disc (23) and the material receiving disc (21); when the spring (24) is in a normal state, the upper end surface of the ejector rod (22) is flush with the inner bottom surface of the material receiving disc (21).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810876826.2A CN108748921B (en) | 2018-08-03 | 2018-08-03 | High-precision injection molding production equipment and production process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810876826.2A CN108748921B (en) | 2018-08-03 | 2018-08-03 | High-precision injection molding production equipment and production process thereof |
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| CN108748921A CN108748921A (en) | 2018-11-06 |
| CN108748921B true CN108748921B (en) | 2020-07-28 |
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| CN201810876826.2A Active CN108748921B (en) | 2018-08-03 | 2018-08-03 | High-precision injection molding production equipment and production process thereof |
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| CN110315692B (en) * | 2019-08-13 | 2021-06-01 | 东莞市艾尔玛科技有限公司 | Injection molding machine for molding product shell |
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| CN1555972A (en) * | 2003-12-30 | 2004-12-22 | 刘津平 | Polymer material extrusion injection shaping method and its device |
| WO2008019922A1 (en) * | 2006-08-16 | 2008-02-21 | Kraussmaffei Technologies Gmbh | Device and method for processing thermosetting plastics |
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| CN108748921A (en) | 2018-11-06 |
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