CN103029263A - Injection molding system, injection molding method, automotive glass-covered edge and automotive window - Google Patents
Injection molding system, injection molding method, automotive glass-covered edge and automotive window Download PDFInfo
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- CN103029263A CN103029263A CN2012105263837A CN201210526383A CN103029263A CN 103029263 A CN103029263 A CN 103029263A CN 2012105263837 A CN2012105263837 A CN 2012105263837A CN 201210526383 A CN201210526383 A CN 201210526383A CN 103029263 A CN103029263 A CN 103029263A
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- 238000001746 injection moulding Methods 0.000 title claims abstract description 59
- 239000007789 gas Substances 0.000 claims abstract description 98
- 239000011259 mixed solution Substances 0.000 claims abstract description 67
- 239000002994 raw material Substances 0.000 claims abstract description 40
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 239000000243 solution Substances 0.000 claims abstract description 27
- 238000000034 method Methods 0.000 claims abstract description 22
- 230000008569 process Effects 0.000 claims abstract description 19
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000011521 glass Substances 0.000 claims description 98
- 238000009957 hemming Methods 0.000 claims description 27
- 238000010438 heat treatment Methods 0.000 claims description 17
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 5
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 4
- 239000001569 carbon dioxide Substances 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 239000011261 inert gas Substances 0.000 claims description 2
- 238000013022 venting Methods 0.000 claims 2
- 238000007599 discharging Methods 0.000 claims 1
- 230000008602 contraction Effects 0.000 abstract description 11
- 239000003292 glue Substances 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 229920002725 thermoplastic elastomer Polymers 0.000 description 5
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004590 computer program Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Inorganic materials O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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Classifications
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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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1271—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed parts being partially covered
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J1/00—Windows; Windscreens; Accessories therefor
- B60J1/08—Windows; Windscreens; Accessories therefor arranged at vehicle sides
- B60J1/10—Windows; Windscreens; Accessories therefor arranged at vehicle sides fixedly mounted
-
- 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
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60J—WINDOWS, WINDSCREENS, NON-FIXED ROOFS, DOORS, OR SIMILAR DEVICES FOR VEHICLES; REMOVABLE EXTERNAL PROTECTIVE COVERINGS SPECIALLY ADAPTED FOR VEHICLES
- B60J1/00—Windows; Windscreens; Accessories therefor
- B60J1/004—Mounting of windows
- B60J1/006—Mounting of windows characterised by fixation means such as clips, adhesive, etc.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
The invention provides an injection molding system, an injection molding method, an automotive glass-covered edge and an automotive window. The injection molding system comprises a gas supply device, a plasticization device and an injection device, wherein the gas supply device is connected with the plasticization device to supply at least one of gases to the plasticization device; the plasticization device is used for plasticizing raw materials to form into the solution, and mixing the gases with the solution to form an air bubble-containing mixed solution; and the injection device is connected with the plasticization device to inject the air bubble-containing mixed solution into a cavity of an automotive glass-covered edge mold. The injection molding method comprises the following steps of: plasticizing the raw materials to form into the solution; injecting at least one of the gases into the raw materials when the raw materials are plasticized; mixing the solution with the gases to form into the air bubble-containing mixed solution; and injecting the mixed solution into the cavity of the automotive glass-covered edge mold to form into the automotive glass-covered edge. The invention further provides the automotive glass-covered edge formed by the injection molding method and the automotive glass-covered edge-containing automotive window. According to the invention, the contraction problem in the process of injection molding can be restrained.
Description
Technical Field
The invention relates to the technical field of glass, in particular to an injection molding system and an injection molding method for forming an automobile glass wrapping edge, the automobile glass wrapping edge formed by the injection molding method and an automobile window comprising the automobile glass wrapping edge.
Background
The glass wrapping can improve the sealing property, noise reduction property and safety of the glass and make the glass more beautiful.
An automobile rear triangular window assembly is disclosed in chinese patent application publication No. CN 102180081A. Referring to fig. 1, a schematic view of the rear quarter window assembly of the automobile in the chinese patent application is shown. Triangular window assembly includes behind the car: a glass 11 and a glass edge 12 formed around the glass 11. The glass covered edge 12 comprises a glue coating surface 121, a lip 122 and a glue containing groove 123. The glue containing groove 123 is formed in the glue coating surface 121 and used for coating glass glue, and the glue dissolving groove 121 can block the transverse flow of the glass glue, so that the glue leakage phenomenon is prevented. The lip 122 is in the form of a sheet that can be compressed and deformed. The glass-clad 12 is formed by an injection molding process.
The injection molding process comprises the following steps: firstly, plasticizing raw materials to form a solution, then injecting the solution into a mold cavity, and cooling and solidifying the solution in the mold cavity to form an injection molding part matched with the mold cavity in shape.
However, when the glass edge is formed by the injection molding process in the prior art, the solution shrinks in the mold cavity due to cooling, so that the size of the glass edge formed by injection molding is smaller than the design specification, and the glass edge cannot be well matched with other accessories of the automobile window. For example: in the assembly process of the automobile window, the phenomenon of 'crack' caused by the mismatching of the sizes of the glass edge and the bright decorative strip is easy to occur.
In order to prevent the shrinkage problem, the prior art adopts a technical scheme of increasing the injection pressure. However, the increase in injection pressure easily causes glass breakage, resulting in a decrease in glass-hemming manufacturing yield.
Disclosure of Invention
Therefore, there is a need for an injection molding system that can suppress the problem of natural shrinkage due to cooling during injection.
According to one aspect of the present invention, there is provided an injection molding system comprising: the device comprises a gas supply device, a plasticizing device, an injection device and an automobile glass edge-wrapping mold; the gas supply device is connected with the plasticizing device and is used for supplying at least one gas to the plasticizing device; the plasticizing device is used for plasticizing the raw material to form a solution and mixing the gas and the solution to form a mixed solution containing bubbles; and the injection device is connected with the plasticizing device and is used for injecting the mixed solution containing the air bubbles into a cavity of the automobile glass edge-wrapping die.
A basic idea is that a gas supply device is provided in connection with the plasticizing device, at least one gas is supplied to the plasticizing device, and a bubble-containing mixed solution is formed in the plasticizing device, so that when the injection device injects the bubble-containing mixed solution into the cavity of the automotive glass hemming mold, the bubbles start to expand due to the change in gas pressure, and the expansion of the bubbles and the contraction of the mixed solution counteract each other, thereby suppressing the problem of contraction.
In one example, the injection molding system is further provided with an exhaust device for exhausting the cavity of the automotive glass-hemming mold during the injection of the mixed solution. By arranging the exhaust device in the injection molding system, the cavity of the automobile glass edge-wrapping mold can be exhausted in the process of injecting the mixed solution, so that the smoothness of the surface of the automobile glass edge-wrapping is improved.
According to another aspect of the present invention, there is provided an injection molding method comprising: plasticizing the feedstock to form a solution; introducing at least one gas into the raw material during plasticizing of the raw material; mixing a solution and the gas together to form a mixed solution containing bubbles; and injecting the mixed solution containing the bubbles into a cavity of an automobile glass edge-wrapping die to form the automobile glass edge-wrapping.
One basic idea is to mix gas into the raw material during plasticizing of the raw material to form a bubble-containing mixed solution, so that when the bubble-containing mixed solution is injected into the mold cavity, the bubbles start to expand due to a change in gas pressure, and the expansion of the bubbles and the contraction of the mixed solution cancel each other out, thereby suppressing the problem of contraction.
In one example, the step of injecting the mixed solution into a cavity of an automotive glass hemming mold further comprises: the cavity of the automobile glass edge-wrapping mold is exhausted in the injection process of the mixed solution, and air is introduced and exhausted in the cavity of the automobile glass edge-wrapping mold in the injection process, so that air bubbles on the surface of the automobile glass edge-wrapping can be removed, and the smoothness of the surface of the automobile glass edge-wrapping is improved.
According to another aspect of the present invention, there is provided an automotive glass-cladding having microholes therein.
The basic idea is that the micropores have the function of preventing the automobile glass edge covering from deforming, so that the yield of the automobile glass edge covering is improved, the existence of the micropores also reduces the weight of the automobile glass edge covering, and the cost of the automobile glass edge covering is reduced.
According to another aspect of the invention, the automobile glass edge covering comprises the automobile glass edge covering.
The basic idea is that the micropores have the function of preventing the edge of the automobile glass from deforming, so that the yield of the automobile window is improved, the weight of the automobile window can be reduced due to the existence of the micropores, and the cost of the automobile window is reduced.
Drawings
FIG. 1 is a schematic view of a rear quarter window assembly of a prior art vehicle;
FIG. 2 is a schematic view of an embodiment of an injection molding system of the present invention;
FIG. 3 is a schematic flow chart of one embodiment of the injection molding method of the present invention;
FIG. 4 is a schematic front view of an embodiment of the window of the present invention;
figure 5 is a rear schematic view of the glazing of figure 4.
Detailed Description
The invention provides an injection molding system and an injection molding method for forming an automobile glass wrapping edge, wherein gas is mixed into raw materials in the plasticizing process of the raw materials to form a mixed solution containing bubbles, so that when the mixed solution containing the bubbles is injected into a mold cavity, the bubbles start to expand due to the change of air pressure, the expansion of the bubbles and the contraction of the mixed solution are mutually offset, and the contraction problem is restrained.
The following is a further description with reference to specific examples.
Referring to FIG. 2, a schematic diagram of an embodiment of an injection molding system of the present invention is shown. The injection molding system comprises: a gas supply device 100, a plasticizing device 200, an injection device 300, and an automotive glass-hemming mold 400. Wherein,
the gas supply device 100 is connected to the plasticizing device 200, and is used for supplying at least one gas to the plasticizing device 200. Specifically, the gas supply device 100 includes a gas cylinder 101, a processing unit 102, and a control unit 103.
The gas bottle 101 is used for storing gas. In this embodiment, the gas cylinder 101 is a gas cylinder storing nitrogen, and the nitrogen does not cause environmental pollution and meets the low-carbon requirement. In other embodiments, the injection molding system may also use one or more of carbon dioxide, inert gas, compressed air, and combinations thereof, which are not limited by the present invention.
And the processing unit 102 is connected with the gas cylinder 101 and is used for adjusting the gas pressure of the gas cylinder 101 for supplying gas to the plasticizing device 200. In particular, the processing unit 102 may be a gas valve.
And the control unit 103 is connected with the processing unit 102 and is used for controlling the air supply time. The time here includes the start time of the gas supply and the duration of the gas supply. Under the control of the control unit 103, the control unit 103 is configured to start gas supply after the raw material is added to the plasticizing device 200, so as to control the timing of gas supply to the plasticizing device 200. The gas supply device 100 controls the total amount of gas introduced into the plasticizing device 200 by controlling the duration of gas supply, and thus can control the size of bubbles in the mixed solution.
Specifically, the control unit 103 may include an electromagnetic switch connected to the processing unit 102, and a clock unit that controls the electromagnetic switch to be turned on or off. The electromagnetic switch may provide gas for pressure adjustment by the processing unit 102 when in an open state, and terminate gas supply when in a closed state. The clock unit may be a virtual unit implemented by a computer program, or may be a circuit unit capable of providing a clock signal. The rising edge of the clock signal can trigger the opening state of the electromagnetic switch, and the falling edge or the falling edge of the clock signal can trigger the closing state of the electromagnetic switch so as to realize the control of the starting time of the gas supply; and the duration time of the high level of the clock signal is used for controlling the duration time of the electromagnetic switch in the opening state, so that the duration time of the gas supply is controlled.
The more gas mixed into the solution formed by plasticizing the raw material, the larger the bubbles in the final mixed solution; the less gas mixed into the solution formed by plasticizing the raw material, the smaller the bubbles in the final mixed solution. That is, the longer the duration of the gas supply under the control of the control unit 103, the larger the bubbles (accordingly, the larger the micropores in the finally formed automotive glass-covered edge) without changing the gas flow rate; the shorter the duration of the gas supply, the smaller the bubbles (and correspondingly the smaller the pores in the final automotive glass trim).
It should be noted that the gas supply device 100 is not limited to the manner of fig. 2, and may further include a compressor for providing compressed air having a certain pressure and a controller; the controller is connected with the compressor and used for controlling the starting time of the compressed air supply and the duration time of the air supply. Thus, the gas supply device 100 can supply compressed air, which is a relatively inexpensive gas, to the plasticizing device 200, which can reduce costs.
And a plasticizing device 200 for plasticizing the raw material to form a solution and for mixing the gas with the solution to form a mixed solution containing bubbles. In this embodiment, the plasticizing device 200 includes: a plasticizing cylinder 201, a barrel 202, and a heating unit 203.
And the plasticizing cylinder 201 is used for feeding raw materials. In this embodiment, the raw material may be particles of polyvinyl chloride (PVC) or Thermoplastic Elastomer (TPE) material. In other embodiments, other materials of origin may also be employed.
A cylinder 202 provided with a gas inlet communicating with the gas supply device 100 and a feed inlet communicating with the plasticizing cylinder 201. The cylinder 202 has a hollow cavity into which gas supplied from the gas supply device 100 enters through the gas inlet, and raw material fed from the plasticizing cylinder 201 enters through the feed port. It should be noted that, the gas inlet and the material inlet may be provided with one-way valves which can only enter, so that the gas and the raw material are sealed in the barrel 202 by the one-way valves after entering the barrel 202, thereby improving the sealing effect of the gas and the raw material in the barrel 202. After being sealed within the barrel 202, the gas and feedstock are mixed and plasticized within the barrel 202.
And the heating unit 203 is used for heating the raw material in the cylinder 202 so as to complete the plasticizing process of the raw material. During plasticization, when the granular raw materials are heated to a forming temperature, fluid solution can be formed. The molding temperature of the granular raw material is generally high when no gas is introduced, but a mixed solution containing bubbles can be formed after the gas is introduced, and the presence of the bubbles increases the fluidity of the mixed solution, thereby lowering the molding temperature during the plasticizing process. Specifically, the raw material in this embodiment is PVC or TPE particles, and the heating step is performed at a temperature in the range of 100 to 200 ℃ (lower than the temperature when no gas is introduced). Therefore, the time spent in the heating process can be reduced, the injection molding period can be shortened, and the production efficiency can be improved.
The heating unit 203 can be realized by adopting a resistance wire heating mode, and the heating principle and structure are the same as those of the prior art, and are not described herein again.
It should be noted that the plasticizing device 200 is not limited to the manner shown in fig. 2, and the plasticizing device 200 may also be of a piston type structure, and specifically includes: the raw materials can be pushed into the cylinder by the piston, and the wall of the cylinder is provided with an air inlet for introducing air. The heating unit is arranged on the outer cylinder wall of the cylinder, and the raw materials in the cylinder can be plasticized by heating of the heating unit.
And an injection device 300 connected to the plasticizing device 200 for injecting the bubble-containing mixed solution into the cavity of the automotive glass hemming mold 400. Specifically, the injection device 300 includes a screw 301, a motor (not shown), and a discharge port 302. The motor and the discharge port 302 are respectively located at both ends of the screw 301.
The discharge hole 302 is communicated with a cavity of the automobile glass edge-wrapping mold 400.
The screw 301 is sleeved in the barrel 202, and under the driving of the motor, the screw 301 rotates towards the discharge port 302, so that the mixed solution in the barrel 202 is injected into the cavity of the automotive glass hemming mold 400 from the discharge port 302 under the injection pressure. Specifically, a first thread is arranged on the inner wall of the cavity of the cylinder 202, and a second thread matched with the first thread is arranged on the rod wall of the screw 301. Pushing the screw 301 can discharge the mixed solution in the cavity of the barrel 202 from the discharge hole 302 and fill the cavity of the automotive glass hemming die 400. Here, the force that moves the screw 301 within the cylinder 202 is the injection pressure.
In addition, the screw 301 can rotate under the driving of the motor, so that the raw materials and the gas can be uniformly mixed between the screw 301 and the inner wall of the cylinder 202, and the plasticizing process of the raw materials can be accelerated. In this embodiment, the screw 301 can rotate along the axis OO'.
The injection device 300 is not limited to the embodiment of fig. 2, and may be another device capable of injecting the mixed solution into the cavity of the automotive glass hemming mold 400, and the specific structure of the injection device 300 is not limited in the present invention.
The cavity of the automotive glass-covered edge mold 400 is matched with the automotive glass covered edge to be formed. And after the mixed solution containing the bubbles is injected into the cavity, the mixed solution is cooled to be in a high elastic state, and then is further cooled and solidified to form the automobile glass edge covering. In the process, on one hand, the phenomenon of natural shrinkage can be generated due to the reduction of the external temperature; on the other hand, due to the decrease in the external pressure (the difference between the air pressure in the closed space of the cylinder 202 and the atmospheric pressure in the automobile glass-hemming mold 400), the bubbles start to expand due to the difference in the air pressure. The expansion of the bubbles and the contraction of the mixed solution are mutually offset, so that the contraction problem of the automobile glass edge covering is inhibited.
It should be noted that, in the injection process of the prior art, in addition to applying the injection pressure to the screw 301 to push the screw 301; a holding pressure is also applied to fill the gap between the mold cavity and the mixed solution caused by shrinkage. Since the present embodiment suppresses the shrinkage problem, the holding pressure may not be applied any more or only a small holding pressure may be applied, thereby preventing the problem of glass breakage caused by an excessively large holding pressure and improving the yield.
In addition, the mixed solution in this embodiment contains bubbles and has better fluidity, so compared with the prior art, the injection pressure in this embodiment is smaller, and the problem of glass breakage can be prevented. In addition, the mixed solution with good fluidity has a good filling effect on the automobile glass hemming die 400, so that the automobile glass hemming die can be used for forming automobile glass hemming with a complex structure.
Furthermore, the finally formed automobile glass edge covering has micropores, so that raw materials can be saved, and the weight of the product can be reduced.
In another embodiment of the injection molding system, an exhaust device is arranged in the injection molding system and used for exhausting the cavity of the automobile glass edge-wrapping mold in the process of injecting the mixed solution.
In particular, the exhaust means may be at least one exhaust vent provided in the automotive glass-hemming die. Through setting up the aperture size of exhaust hole can guarantee can not discharge the mixed solution again when gas outgoing. Preferably, in the case that the number of the exhaust holes is multiple, the exhaust holes can be uniformly arranged on the automobile glass edge covering mold to realize uniform exhaust, so as to ensure the smoothness of the large-area automobile glass edge covering surface, and therefore, in addition to the advantages of the foregoing embodiment, the injection molding system provided with the exhaust device of the present embodiment can also prevent bubbles from being formed on the glass edge covering surface.
The exhaust device can also be at least one exhaust box needle arranged in the automobile glass edge-covering die. The air on the surface of the automobile glass wrapping edge can be sucked out through the exhaust box needle. Preferably, the exhaust box needle is disposed in the automobile glass-covered edge mold at a position corresponding to a rear surface of the automobile glass-covered edge for aesthetic reasons. The rear side of the vehicle glass cladding refers to the side of the vehicle glass cladding facing the vehicle body when mounted.
The exhaust device can also be a vacuumizing device connected with the automobile glass edge-wrapping die, the vacuumizing device can pump out gas in the edge wrapping of the automobile glass, and the vacuumizing device is high in price, but has good controllability and can ensure the exhaust effect.
The invention also provides an injection molding method, and referring to fig. 3, a flow diagram of an embodiment formed by the injection molding method of the invention is shown. The injection molding method generally comprises the steps of:
step S1, plasticizing the raw material to form a solution;
step S2, introducing at least one gas into the raw material in the process of plasticizing the raw material;
step S3, mixing the solution and the gas together to form a bubble-containing mixed solution;
and step S4, injecting the mixed solution containing the bubbles into a cavity of an automobile glass edge-wrapping mold to form the automobile glass edge-wrapping.
The injection molding method according to the present invention will be described in detail with reference to the injection molding system shown in FIG. 2.
Step S1 is executed to inject PVC or TPE particles into the plasticizing cylinder 201, and enter the cavity of the cylinder 202 through the feeding port of the cylinder 202. After the feedstock is dosed, the feedstock in barrel 202 is heated by heating device 203 to form a solution.
Step S2 is performed to introduce at least one gas into the cavity of the barrel 202 via the gas inlet of the barrel 202 under the control of the control unit 103 in the gas supply device 100. In this embodiment, the gas may be nitrogen. In other embodiments, the gas may also be carbon dioxide or a mixture of nitrogen and carbon dioxide.
It should be noted that, the more gas mixed into the solution, the larger the bubbles, and the larger the micropores formed in the final automotive glass edge; the less gas mixed into the solution, the smaller the bubbles and the smaller the micropores that eventually form in the automotive glass trim. Therefore, the sizes of the bubbles and the micropores can be adjusted in practical application by adjusting the gas flow rate and the gas supply duration.
In step S3, the gas and the raw material entering the cylinder 202 can be sealed in the cylinder 202 by the one-way valve, so as to improve the sealing effect of the cylinder 202. The screw 301 sleeved in the cylinder 202 is driven by the motor to rotate along the axis OO', so that the solution and the gas between the screw 301 and the cylinder wall of the cylinder 202 are uniformly mixed together to form a mixed solution containing bubbles.
It should be noted that the processes of plasticizing the raw material, introducing gas, and rotating to achieve mixing may be performed simultaneously.
The method comprises the steps of forming a mixed solution containing air bubbles after air is introduced, improving the fluidity of the mixed solution due to the existence of the air bubbles, and reducing the forming temperature in the plasticizing process, wherein the raw material is PVC or TPE, and the heating step enables the temperature to be within the range of 100-200 ℃.
Step S4 is executed, the screw 301 injects the mixed solution into the cavity of the automotive glass hemming mold 400 at an injection pressure, after the mixed solution containing air bubbles is injected into the cavity, the mixed solution is cooled to form a high elastic state, and then is further cooled to solidify, so as to form the automotive glass hemming. The expansion of the bubbles and the contraction of the mixed solution are mutually offset, so that the contraction problem of the automobile glass edge covering is restrained.
It should be noted that, after the mixed solution is injected into the cavity, if the temperature in the cavity is too high, the curing process is not favorable, and if the temperature in the cavity is too low, the curing process is too fast, and the counteracting effect of the expansion of the bubbles on the shrinkage is not good. Therefore, the temperature of the mixed solution after being injected into the cavity is preferably in the range of 30 to 50 ℃.
It should be noted that after the cavity is filled, a smaller holding pressure than that in the prior art without introducing gas may be applied to the screw 301 to maintain the injection state, so that the newly injected mixed solution fills the gap between the cavity and the mixed solution due to shrinkage. It should be noted that, because the invention restrains the shrinkage problem, the pressure maintaining pressure can be not applied any more, but only the injection pressure is applied during the injection, thereby simplifying the steps, reducing the injection molding period and improving the production efficiency.
Correspondingly, the invention further provides the automobile glass wrapping edge and the automobile window comprising the automobile glass wrapping edge. Fig. 4 and 5 show a front schematic view and a back schematic view of an embodiment of the vehicle window of the present invention. The present embodiment takes a triangular window as an example, but the present invention is not limited thereto.
The vehicle window includes: the glass comprises a triangular glass 500 and an automobile glass edge covering 501 positioned on the periphery of the triangular glass 500.
The automotive glass trim 501 in the vehicle window of the present invention includes a plurality of micro-holes therein. The micropores have the effect of preventing the automobile glass edge covering from deforming, so that the yield of the automobile glass edge covering is improved; in addition, the existence of the micropores can also reduce the weight of the automobile glass edge; further, the presence of the micro-holes may also save material from forming the automotive glass trim to reduce costs.
If the size of the micropores is too large, the micropores easily penetrate through the automobile glass edge covering 501 to form open-type bubbles; if the size of the micropores is too small, the effect of suppressing shrinkage is small. Therefore, the diameter of the inner micropore of the automobile glass covered edge 501 is preferably in the range of 0.01-1 mm.
Here, the automobile glass edge cover 501 may be formed by the injection molding method of the present invention, or may be formed by other methods, which is not limited by the present invention.
In addition, the micro-holes can reduce the weight of the automobile glass covered edge 501 and the automobile window.
The back of the window is also provided with an assembling component 502, and the assembling component 502 is used for assembling the window with an automobile body (not shown).
Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention, and those skilled in the art can make variations and modifications of the present invention without departing from the spirit and scope of the present invention by using the methods and technical contents disclosed above.
Claims (21)
1. An injection molding system, comprising: the device comprises a gas supply device, a plasticizing device, an injection device and an automobile glass edge-wrapping mold; wherein,
the gas supply device is connected with the plasticizing device and is used for supplying at least one gas to the plasticizing device;
the plasticizing device is used for plasticizing the raw material to form a solution and mixing the gas and the solution to form a mixed solution containing bubbles;
and the injection device is connected with the plasticizing device and is used for injecting the mixed solution containing the air bubbles into a cavity of the automobile glass edge-wrapping die.
2. The injection molding system of claim 1, further comprising an exhaust for exhausting the cavity of the automotive glass-hemming mold during injection of the mixed solution.
3. The injection molding system of claim 2, wherein the venting means is at least one vent hole disposed in the automotive glass-hemming mold.
4. The injection molding system of claim 2, wherein the exhaust device is at least one exhaust box pin disposed in the automotive glass-hemming mold.
5. The injection molding system of claim 4, wherein the venting box pin is disposed at a location of the automotive glass-hemming mold corresponding to a back side of an automotive glass-hemming mold.
6. The injection molding system of claim 2, wherein the exhaust is a vacuum extractor associated with the automotive glass-hemming mold.
7. The injection molding system of claim 1, wherein the gas supply device comprises: a gas cylinder for storing gas;
the processing unit is connected with the gas cylinder and used for adjusting the gas pressure of the gas supplied by the gas cylinder;
and the control unit is connected with the processing unit and used for controlling the air supply time.
8. The injection molding system of claim 1, wherein the plasticizing device comprises:
the plasticizing charging barrel is used for feeding raw materials;
the cylinder is provided with a gas inlet communicated with the gas supply device and a feed inlet communicated with the plasticizing cylinder;
a heating unit for heating the barrel.
9. An injection molding system as claimed in claim 1, wherein said gas is one or more of nitrogen, carbon dioxide, an inert gas, compressed air.
10. The injection molding system of claim 1, wherein the injection device comprises:
the discharge hole is communicated with a cavity of the automobile glass edge-wrapping die;
the screw rod and the motor are driven by the motor to rotate towards the discharge port, and the screw rod is used for discharging the mixed solution in the plasticizing device from the discharge port and filling the mixed solution into a cavity of the automobile glass edge-wrapping die.
11. An injection molding method, comprising:
plasticizing the feedstock to form a solution;
introducing at least one gas in the process of plasticizing the raw material;
mixing the solution and the gas together to form a mixed solution containing bubbles;
and injecting the mixed solution containing the bubbles into a cavity of an automobile glass edge-wrapping die to form the automobile glass edge-wrapping.
12. An injection molding method as claimed in claim 11, wherein said step of injecting said mixed solution into a cavity of an automotive glass-hemming mold further comprises:
and exhausting the cavity of the automobile glass edge-wrapping mold in the process of injecting the mixed solution.
13. An injection molding method according to claim 11, wherein the step of injecting the mixed solution into a cavity of an automotive glass-hemming mold comprises:
injecting the mixed solution into a cavity of the automobile glass edge-wrapping mold at injection pressure;
the injection state is maintained at the holding pressure.
14. An injection molding method according to claim 11, wherein the step of injecting the mixed solution into a cavity of an automotive glass-hemming mold comprises:
and injecting the mixed solution into a cavity of the automobile glass edge-wrapping mold at injection pressure.
15. An injection molding method as claimed in claim 11, wherein said step of plasticizing the feedstock comprises:
heating the feedstock.
16. An injection molding method as claimed in claim 15, wherein the material is PVC or TPE and the heating step is performed to a temperature in the range of 100-200 ℃.
17. An injection molding method according to claim 11, wherein in the step of injecting the mixed solution into the cavity of the automotive glass-hemming mold, the temperature of the mixed solution is in a range of 30 to 50 ℃.
18. The automobile glass wrapping edge is characterized in that micropores are formed in the automobile glass wrapping edge.
19. The automotive glass-hemming of claim 18 wherein the diameter of the micro-apertures is in the range of 0.01 to 1 mm.
20. The automotive glass-overclad of claim 18, wherein the automotive glass-overclad is formed by the injection molding process of any one of claims 11 to 17.
21. A vehicle glazing comprising an automotive glass surround as claimed in any one of claims 18 to 20.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210526383.7A CN103029263B (en) | 2012-12-07 | 2012-12-07 | Adapted to injection system and injection moulding process, automobile glass encapsulation, vehicle window |
| PCT/CN2013/088675 WO2014086303A1 (en) | 2012-12-07 | 2013-12-05 | System and method of injection molding, vehicle glass encapsulation and vehicle window |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210526383.7A CN103029263B (en) | 2012-12-07 | 2012-12-07 | Adapted to injection system and injection moulding process, automobile glass encapsulation, vehicle window |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103029263A true CN103029263A (en) | 2013-04-10 |
| CN103029263B CN103029263B (en) | 2016-03-02 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210526383.7A Expired - Fee Related CN103029263B (en) | 2012-12-07 | 2012-12-07 | Adapted to injection system and injection moulding process, automobile glass encapsulation, vehicle window |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103029263B (en) |
| WO (1) | WO2014086303A1 (en) |
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| WO2014086303A1 (en) * | 2012-12-07 | 2014-06-12 | Saint-Gobain Glass France | System and method of injection molding, vehicle glass encapsulation and vehicle window |
| CN104476855A (en) * | 2014-12-01 | 2015-04-01 | 福耀玻璃工业集团股份有限公司 | Laminated glass with holes |
| CN104647679A (en) * | 2013-11-22 | 2015-05-27 | 法国圣戈班玻璃公司 | Method for forming automobile glass covered edge, window and mould |
| WO2016000612A1 (en) * | 2014-07-04 | 2016-01-07 | Saint-Gobain Glass France | Glass encapsulation structure and injection molding device |
| CN106184481A (en) * | 2016-07-14 | 2016-12-07 | 上海车功坊汽车服务有限公司 | A kind of vehicle glass frame automatic mounting process of sealing strip bound edge |
| CN109366860A (en) * | 2018-11-02 | 2019-02-22 | 北京航玻新材料技术有限公司 | A kind of automation vacuum injection system |
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| CN109732842A (en) * | 2018-12-20 | 2019-05-10 | 合肥旭弘塑胶制品有限公司 | A kind of Shooting Technique |
| CN111196005A (en) * | 2020-01-09 | 2020-05-26 | 杨保长 | Injection molding machine for plastic processing |
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| FR3121874A1 (en) | 2021-04-16 | 2022-10-21 | Saint-Gobain Glass France | Glazing COMPRISING A profiled bead with foaming AGENT AND A GLUED COVER PIECE AS WELL AS THE PROCESS FOR MANUFACTURING THIS GLAZING |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1980778A (en) * | 2004-05-12 | 2007-06-13 | 木桥泡沫塑料公司 | Vented mold and method for producing molded article |
| CN101166644A (en) * | 2005-04-27 | 2008-04-23 | 伟巴斯特日本有限公司 | Roof panel for vehicle |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04353413A (en) * | 1991-05-31 | 1992-12-08 | Aisin Seiki Co Ltd | Manufacture of window glass with molding |
| JP3423054B2 (en) * | 1994-01-21 | 2003-07-07 | 日本板硝子株式会社 | Molding method for resin molding |
| CN103029263B (en) * | 2012-12-07 | 2016-03-02 | 法国圣戈班玻璃公司 | Adapted to injection system and injection moulding process, automobile glass encapsulation, vehicle window |
-
2012
- 2012-12-07 CN CN201210526383.7A patent/CN103029263B/en not_active Expired - Fee Related
-
2013
- 2013-12-05 WO PCT/CN2013/088675 patent/WO2014086303A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1980778A (en) * | 2004-05-12 | 2007-06-13 | 木桥泡沫塑料公司 | Vented mold and method for producing molded article |
| CN101166644A (en) * | 2005-04-27 | 2008-04-23 | 伟巴斯特日本有限公司 | Roof panel for vehicle |
Cited By (20)
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|---|---|---|---|---|
| WO2014086303A1 (en) * | 2012-12-07 | 2014-06-12 | Saint-Gobain Glass France | System and method of injection molding, vehicle glass encapsulation and vehicle window |
| KR101887790B1 (en) * | 2013-11-22 | 2018-08-10 | 쌩-고벵 글래스 프랑스 | Method for forming vehicle glass encapsulation, vehicle window and mold |
| EP3089885A4 (en) * | 2013-11-22 | 2017-07-26 | Saint-Gobain Glass France | Method for forming vehicle glass encapsulation,vehicle window and mold |
| WO2015074579A1 (en) * | 2013-11-22 | 2015-05-28 | Saint-Gobain Glass France | Method for forming vehicle glass encapsulation,vehicle window and mold |
| CN104647679A (en) * | 2013-11-22 | 2015-05-27 | 法国圣戈班玻璃公司 | Method for forming automobile glass covered edge, window and mould |
| KR20160083939A (en) * | 2013-11-22 | 2016-07-12 | 쌩-고벵 글래스 프랑스 | Method for forming vehicle glass encapsulation, vehicle window and mold |
| EA033162B1 (en) * | 2013-11-22 | 2019-09-30 | Сэн-Гобэн Гласс Франс | Method for forming vehicle glass encapsulation and vehicle window |
| JP2016539026A (en) * | 2013-11-22 | 2016-12-15 | サン−ゴバン グラス フランス | Method for forming glass sealing member for transportation means, window glass and mold for transportation means |
| US9889585B2 (en) | 2014-07-04 | 2018-02-13 | Saint-Gobain Glass France | Glass encapsulation structure and injection molding device |
| WO2016000612A1 (en) * | 2014-07-04 | 2016-01-07 | Saint-Gobain Glass France | Glass encapsulation structure and injection molding device |
| CN104476855A (en) * | 2014-12-01 | 2015-04-01 | 福耀玻璃工业集团股份有限公司 | Laminated glass with holes |
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| CN106184481B (en) * | 2016-07-14 | 2019-04-19 | 上海车功坊智能科技股份有限公司 | A kind of automatic mounting process of vehicle glass frame sealing strip bound edge |
| CN109435644A (en) * | 2018-10-24 | 2019-03-08 | 姚晓宁 | More Material cladding automobile corner window glass fitting structures and production technology |
| CN109435644B (en) * | 2018-10-24 | 2021-08-17 | 河北楚恒新能源科技有限公司 | Multi-material composite automobile corner window glass mounting structure and production process |
| CN109366860A (en) * | 2018-11-02 | 2019-02-22 | 北京航玻新材料技术有限公司 | A kind of automation vacuum injection system |
| CN109732842A (en) * | 2018-12-20 | 2019-05-10 | 合肥旭弘塑胶制品有限公司 | A kind of Shooting Technique |
| CN112776294A (en) * | 2019-11-08 | 2021-05-11 | 中创文保科技发展(北京)有限公司 | Preparation process of package and package prepared by using same |
| CN112776294B (en) * | 2019-11-08 | 2022-05-13 | 中创文保科技发展(北京)有限公司 | Preparation process of package and package prepared by using same |
| CN111196005A (en) * | 2020-01-09 | 2020-05-26 | 杨保长 | Injection molding machine for plastic processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103029263B (en) | 2016-03-02 |
| WO2014086303A1 (en) | 2014-06-12 |
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