CN113459362A - Vacuum glue injection molding process method - Google Patents
Vacuum glue injection molding process method Download PDFInfo
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- CN113459362A CN113459362A CN202110748633.0A CN202110748633A CN113459362A CN 113459362 A CN113459362 A CN 113459362A CN 202110748633 A CN202110748633 A CN 202110748633A CN 113459362 A CN113459362 A CN 113459362A
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- injection molding
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- 239000003292 glue Substances 0.000 title claims abstract description 60
- 238000001746 injection moulding Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 32
- 239000000084 colloidal system Substances 0.000 claims abstract description 34
- 238000002347 injection Methods 0.000 claims abstract description 26
- 239000007924 injection Substances 0.000 claims abstract description 26
- 239000000463 material Substances 0.000 claims description 14
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000004519 manufacturing process Methods 0.000 abstract description 14
- 238000005538 encapsulation Methods 0.000 abstract description 3
- 230000001681 protective effect Effects 0.000 description 9
- 238000000465 moulding Methods 0.000 description 7
- 238000002360 preparation method Methods 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004512 die casting Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000009969 flowable effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000010137 moulding (plastic) Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004634 thermosetting polymer Substances 0.000 description 1
Images
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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C39/10—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. casting around inserts or for coating articles
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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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/24—Feeding the material into the mould
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/38—Heating or cooling
-
- 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
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/42—Casting under special conditions, e.g. vacuum
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
- B29C39/22—Component parts, details or accessories; Auxiliary operations
- B29C39/44—Measuring, controlling or regulating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The embodiment of the invention discloses a vacuum glue injection molding process method, which belongs to the technical field of glue injection molding and comprises the following steps: s1: placing the blank into a die, and fixing the position of the blank; s2: closing the die, namely covering an upper die of the die on a lower die to clamp the blank between the upper die and the lower die, wherein a glue injection port on the die is arranged at the head end of the blank, and an exhaust port is arranged at the tail end of the blank; s3: the mould is sent into a cavity of a vacuum box, and the vacuum box is vacuumized and maintains a vacuum state; s4: and injecting glue into the mold in the vacuum box to process the blank. The method of the invention uses the mould, solves the problem that the colloid can not generate specific shape during encapsulation, and leads the colloid to be formed on the blank to obtain the required product; vacuum glue injection is carried out, so that bubbles generated by glue are avoided, and the flatness of the product is not influenced. The colloid is directly formed on the blank without secondary processing, thereby saving the process manufacturing time, improving the process manufacturing efficiency, improving the product quality and reducing the manufacturing cost.
Description
Technical Field
The embodiment of the invention relates to the technical field of glue injection molding, in particular to a vacuum glue injection molding process method.
Background
Injection molding is a method for producing and molding industrial products. The products are generally produced by rubber injection molding and plastic injection molding. The injection molding can be classified into injection molding and die casting. An injection molding machine (an injection machine or an injection molding machine for short) is a main molding device for making thermoplastic plastics or thermosetting materials into plastic products with various shapes by using a plastic molding die, and the injection molding is realized by the injection molding machine and the die. The encapsulation is to pour the liquid compound into the device with electronic components and circuits mechanically or manually, and solidify the liquid compound into the thermosetting polymer insulating material with excellent performance under normal temperature or heating condition. The integrity of the electronic device is strengthened, and the resistance to external impact and vibration is improved; the insulation between internal elements and circuits is improved, and the miniaturization and the light weight of devices are facilitated; the direct exposure of elements and circuits is avoided, the waterproof and moistureproof performances of the device are improved, and the service performance and stable parameters are improved.
The traditional manufacturing process is to bond the protective bracket and the display panel together through structural adhesive after injection molding. For the touchable display panel which needs to use the protective bracket, the high temperature in the injection molding process exceeds the bearing limit of the display panel, and the adhesive force between the injection molding material and the glass material is insufficient, so that the protective bracket cannot be directly injection molded on the display panel.
Therefore, it is an urgent need to solve the technical problem of the art to provide a novel glue injection molding method to directly adhere the protection bracket and the display panel.
Disclosure of Invention
Therefore, the embodiment of the invention provides a vacuum glue injection molding process method, which is used for solving the problem that a protective bracket can be bonded with a display panel only through structural glue after injection molding because the protective bracket cannot be directly injection molded on the display panel in the prior art.
In order to achieve the above object, the embodiments of the present invention provide the following technical solutions:
a vacuum glue injection molding process method comprises the following steps:
s1: placing the blank into a die, and fixing the position of the blank;
s2: closing the die, namely covering an upper die of the die on a lower die to clamp the blank between the upper die and the lower die, wherein a glue injection port on the die is arranged at the head end of the blank, and an exhaust port is arranged at the tail end of the blank;
s3: the die is conveyed into a cavity of a vacuum box, and the vacuum box is vacuumized and maintains a vacuum state;
s4: and injecting glue into the mold in the vacuum box to process the blank.
Further, before step S3, the following step S201 is also included:
preheating the die and the blank in the die.
Further, after the step S4, the following step S5 is also included:
and (4) decompressing the vacuum box, and taking out the mold in the vacuum box.
Further, after the step S5, the following step S6 is also included:
and after the mold is taken out, the mold is placed into a curing furnace, and the colloid and the blank are cured and formed in the curing furnace.
Further, after the step S6, the following step S7 is also included:
and taking the mold out of the curing furnace, dismantling the mold and taking out the product.
Further, the air pressure in the vacuum box is set to be 50-200 mbar.
Further, the glue injection speed of the mold in the vacuum box is set to be 0.1-1 mL/min.
Further, the preheating temperature of the die and the blank is 30-50 ℃.
Further, the curing temperature of the curing oven is set to be 50-70 ℃, and the curing time of the curing oven is set to be 0.5-1.5 h.
Further, the colloid material is epoxy resin.
The embodiment of the invention has the following advantages:
the invention uses the mould, puts the blank into the mould, the blank is held between the upper mould and the lower mould of the mould, wherein the glue injection port on the mould is arranged at the head end of the blank, the exhaust port is arranged at the tail end of the blank, and the blank is injected with glue through the glue injection port, so that the blank is produced into a complete product. The mold is applied, so that the problem that the colloid cannot generate a specific shape during encapsulation is solved, and the colloid is molded on a blank to obtain a required product; the invention adopts a vacuum glue injection method, the mould and the blank are placed in the vacuum box, the vacuum box is vacuumized and maintains the vacuum state, so that the mould and the blank are in vacuum, and the colloid is prevented from generating bubbles during glue injection to influence the flatness of the product. Meanwhile, the vacuum state reduces the temperature of glue injection, and avoids the damage to the product caused by the fact that the high temperature exceeds the bearing limit of the product. The invention provides a vacuum glue injection molding process method, which is used for directly molding a colloid on a blank, is simple and easy to operate, does not need secondary processing, saves process manufacturing time, improves process manufacturing efficiency, improves product quality and reduces manufacturing cost.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, ratios, sizes, and the like shown in the present specification are only used for matching with the contents disclosed in the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical significance, and any structural modifications, changes in the ratio relationship, or adjustments of the sizes, without affecting the effects and the achievable by the present invention, should still fall within the range that the technical contents disclosed in the present invention can cover.
FIG. 1 is a flow chart of the operation of an embodiment of the present invention;
FIG. 2 is a schematic structural view of a mold and a blank before glue injection;
FIG. 3 is a schematic structural view of the mold and the blank after glue injection;
in the figure:
1, blank material; 2, molding; 201, an upper die; 202, a lower die; 3, injecting glue; 4 an exhaust port; 5, colloid.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to solve the related technical problems in the prior art, the embodiment of the application provides a vacuum glue injection molding process method, which aims to solve the problem that the conventional protective bracket cannot be directly injection-molded on a display panel and the like, and realizes the effect of directly adhering the protective bracket and the display panel. As shown in fig. 1-3, the method specifically comprises the following steps:
s1: placing the blank 1 into a die 2, and fixing the position of the blank 1;
s2: closing the mold, namely closing an upper mold 201 of the mold 2 on a lower mold 202 to clamp the blank 1 between the upper mold 201 and the lower mold 202, wherein a glue injection port 3 on the mold 2 is arranged at the head end of the blank 1, and an exhaust port 4 is arranged at the tail end of the blank 1;
s3: the mould 2 is sent into a cavity of a vacuum box, and the vacuum box is vacuumized and maintains a vacuum state;
s4: glue is injected into a mold 2 in a vacuum box to process the blank 1.
In the prior art, the protective bracket is bonded with the display panel through structural adhesive after injection molding, the glue injection method directly injects glue on the blank 1, and the protective bracket can be directly injected and molded on the display panel. The production method does not need secondary processing, saves the process manufacturing time and improves the process manufacturing efficiency. The method of vacuum glue injection is adopted, the mould 2 and the blank 1 are placed in a vacuum box, the vacuum box is vacuumized and maintains a vacuum state, so that the mould 2 and the blank 1 are in vacuum, and defects of pinholes, bubbles, cavities and the like on the surface of a product caused by the molding of the colloid 5 are avoided during glue injection, and the manufacturing of the product is influenced. Meanwhile, the vacuum state reduces the temperature of glue injection, and avoids the damage to the product caused by the fact that the high temperature exceeds the bearing limit of the product.
The method comprises the following steps of adopting an automatic glue pouring machine in the step of vacuum glue injection, wherein the automatic glue pouring machine comprises a material preparation machine, a vacuum box, a metering valve and a vacuum pump, putting a mold 2 and a blank 1 into a cavity of the vacuum box, setting and adjusting the vacuum degree in the cavity in real time on a touch screen of the vacuum box, and setting the air pressure in the vacuum box to be 50-200 mbar to ensure that the vacuum box is vacuumized and maintains a vacuum state. The preparation machine is started to automatically suck and stir the materials uniformly, so that the colloid 5 is fully stirred, and the situations of semi-dry and local non-dry are avoided. The charging barrel in the stock preparation machine or the feeding pump of the glue outlet pipeline can be heated to heat the glue 5 material to be flowable. The vacuum degree in the cavity can be set and adjusted in real time in the material preparation machine, and air in the colloid 5 material is pumped away, so that the colloid 5 material poured out of the colloid has no bubbles. The colloid 5 material is conveyed to the metering valve through the screw pump under the pressure stabilization. The metering valve is accurate in metering, the glue is accurately proportioned according to the proportion, the proportion is accurate, the proportioning precision is positive and negative one percent, the glue discharging is accurate, and the glue is strictly discharged according to the specified amount. The glue discharging speed of the metering valve is controlled, the glue injection speed is set to be 0.1-1 mL/min, and the glue injection speed is controlled to be 0.6 mL/min. The glue 5 in the metering valve is ensured to be stably and continuously injected to the blank 1 through the glue injection port 3 on the die 2. The glue 5 is thus initially formed on the blank 1.
The head end of blank 1 is located to injecting glue mouth 3 on the mould 2, and colloid 5 passes through injecting glue mouth 3 steadily continuously, forms the colloid 5 of isostructure according to the demand of product, and the adhesion is on blank 1, accomplishes the manufacturing of product. The exhaust port 4 is arranged at the tail end of the blank 1, and when the vacuum box is vacuumized, gas in the mold 2 is exhausted out of the vacuum box through the exhaust port 4, so that the mold 2 is also in a vacuum state, and bubbles are prevented from being generated when the colloid 5 enters the mold 2.
Before step S3, the following step S201 is also included:
the mould 2 and the blank 1 therein are preheated.
This step occurs after the closing of the mould and before the mould 2 is fed into the cavity of the vacuum box. The die 2 and the blank 1 therein are preheated, and the temperature difference between the die 2 and the blank 1 therein is reduced. If the temperature difference between the die 2 and the blank 1 therein is too large, the colloid 5 is heated unevenly when entering the die 2 and the blank 1, and the flatness of the colloid 5 cannot be ensured. And controlling the preheating temperature of the die 2 and the blank 1 to be 30-50 ℃. The temperature in this range does not solidify the gel 5, and ensures the flow stability of the gel 5. The mold 2 and the blank 1 therein are heated together, so that the temperature of the mold 2 is close to or even equal to that of the blank 1 therein, and the glue 5 cannot be solidified in advance when flowing on the blank 1, so that the blank 1 is uniformly dipped and has a smooth appearance, and the standardized production of products is ensured.
After step S4, the following step S5 is also included:
the vacuum box is decompressed and the mould 2 in the vacuum box is taken out.
At this time, the blank 1 and the colloid 5 in the mold 2 are preliminarily molded, the vacuum environment in the vacuum box is removed, the air pressure of the vacuum box is equivalent to that of the external environment, the box door of the vacuum box is opened, and the mold 2 and the blank 1 in the mold are taken out from the inner cavity of the vacuum box.
After step S5, the following step S6 is also included:
and (3) taking out the mold 2, putting the mold 2 into a curing furnace, and curing and molding the colloid 5 and the blank 1 in the curing furnace.
After the mold 2 is taken out, the blank 1 and the colloid 5 in the mold 2 are preliminarily formed, the colloid 5 is partially cured, and the mold 2 needs to be placed in a curing furnace for final curing and forming of the colloid 5. The curing temperature of the curing oven is set to be 50-70 ℃, and the curing time of the curing oven is set to be 0.5-1.5 h. The curing temperature of the curing oven is set to be 60 ℃, and the curing time of the curing oven is set to be 1 hour.
After step S6, the following step S7 is also included:
and taking the mold 2 out of the curing furnace, dismantling the mold 2 and taking out the product.
And after 1h, solidifying and forming the blank 1 and the colloid 5 in the die 2, stopping heating, cooling the die 2 and the blank 1 and the colloid 5 in the die, disassembling the die 2, and taking out the formed product.
The colloid 5 material adopted by the invention is epoxy resin. The epoxy resin has excellent physical mechanical and electrical insulation performance, and simultaneously has strong adhesive property, and the flexibility of the use process is not possessed by other thermosetting plastics. The epoxy resin can be solidified and adhered on the blank 1 after being melted at high temperature.
The application process of the embodiment of the invention is as follows:
the blank 1 is placed in the mould 2 and the position of the blank 1 is fixed. The mold is closed, and the upper mold 201 of the mold 2 is closed over the lower mold 202. Preheating the die 2 and the blank 1 in the die, and then conveying the die into a cavity of a vacuum box. And closing the door of the vacuum box, and setting the vacuum degree in the cavity on the touch screen of the vacuum box to ensure that the vacuum box is vacuumized and maintains the vacuum state. The preparation machine is started, the materials are automatically sucked and uniformly stirred, and the colloid 5 is stably and continuously injected to the blank 1 through the glue injection port 3 on the die 2 through the metering valve after being heated by the preparation machine. After the blank 1 and the colloid 5 in the mold 2 are preliminarily formed, the vacuum box is decompressed, and the mold 2 in the vacuum box is taken out. And (3) after the mold 2 is taken out, placing the mold 2 into a curing furnace, and further curing and molding the colloid 5 and the blank 1 in the curing furnace. And (3) stopping heating after the forming, removing the die 2 after the die 2 and the blank 1 and the colloid 5 in the die are cooled, and taking out the formed product.
Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.
Claims (10)
1. A vacuum glue injection molding process method is characterized by comprising the following steps:
s1: placing the blank into a die, and fixing the position of the blank;
s2: closing the die, namely covering an upper die of the die on a lower die to clamp the blank between the upper die and the lower die, wherein a glue injection port on the die is arranged at the head end of the blank, and an exhaust port is arranged at the tail end of the blank;
s3: the die is conveyed into a cavity of a vacuum box, and the vacuum box is vacuumized and maintains a vacuum state;
s4: and injecting glue into the mold in the vacuum box to process the blank.
2. The vacuum gel injection molding process method as claimed in claim 1, further comprising, before step S3, the following step S201:
preheating the die and the blank in the die.
3. The vacuum gel injection molding process of claim 2, further comprising, after step S4, step S5 of:
and (4) decompressing the vacuum box, and taking out the mold in the vacuum box.
4. The vacuum gel injection molding process of claim 3, further comprising, after step S5, step S6 of:
and after the mold is taken out, the mold is placed into a curing furnace, and the colloid and the blank are cured and formed in the curing furnace.
5. The vacuum gel injection molding process of claim 4, further comprising, after step S6, step S7 of:
and taking the mold out of the curing furnace, dismantling the mold and taking out the product.
6. The vacuum gel injection molding process method according to claim 5, wherein the air pressure in the vacuum box is set to 50-200 mbar.
7. The vacuum glue injection molding process method as claimed in claim 6, wherein the glue injection speed of the mold in the vacuum box is set to be 0.1-1 mL/min.
8. The vacuum glue injection molding process method as claimed in claim 7, wherein the preheating temperature of the mold and the blank is 30-50 ℃.
9. The vacuum glue injection molding process method as claimed in claim 8, wherein the curing temperature of the curing oven is set to 50-70 ℃, and the curing time of the curing oven is set to 0.5-1.5 h.
10. The vacuum gel injection molding process of claim 9, wherein the gel material is epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110748633.0A CN113459362A (en) | 2021-07-02 | 2021-07-02 | Vacuum glue injection molding process method |
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| CN202110748633.0A CN113459362A (en) | 2021-07-02 | 2021-07-02 | Vacuum glue injection molding process method |
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Application publication date: 20211001 |