CN114102976A - Integrated rubber coating method and device - Google Patents
Integrated rubber coating method and device Download PDFInfo
- Publication number
- CN114102976A CN114102976A CN202111412177.9A CN202111412177A CN114102976A CN 114102976 A CN114102976 A CN 114102976A CN 202111412177 A CN202111412177 A CN 202111412177A CN 114102976 A CN114102976 A CN 114102976A
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- supporting
- support
- wall
- piece
- points
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- 238000010073 coating (rubber) Methods 0.000 title claims abstract description 22
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002347 injection Methods 0.000 claims abstract description 32
- 239000007924 injection Substances 0.000 claims abstract description 32
- 238000001746 injection moulding Methods 0.000 claims abstract description 28
- 238000005538 encapsulation Methods 0.000 claims abstract description 19
- 239000003292 glue Substances 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims description 13
- 229920003023 plastic Polymers 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 3
- 239000007788 liquid Substances 0.000 abstract description 5
- 239000003814 drug Substances 0.000 abstract description 4
- 238000005516 engineering process Methods 0.000 abstract description 4
- 230000007547 defect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract 1
- 238000000465 moulding Methods 0.000 description 9
- 239000010410 layer Substances 0.000 description 8
- 239000011247 coating layer Substances 0.000 description 4
- 238000010030 laminating Methods 0.000 description 4
- 230000005389 magnetism Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—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
- B29C45/14065—Positioning or centering articles in the mould
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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
- B29C45/14—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
- B29C45/14819—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 inserts being completely encapsulated
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
The invention discloses an integrated rubber coating method and device, which comprises the following steps: providing a support outside the product, wherein the support matches the shape of the product to be encapsulated; arranging a plurality of supporting points on the outer side wall of the supporting piece needing to be encapsulated; the support piece is placed in an injection mold cavity, a plurality of support points are in contact with the inner wall of the injection mold cavity, so that an injection molding space is formed between the support piece and the inner wall of the injection mold cavity, and molten glue is injected into the injection molding space. The invention eliminates the gap of the traditional technology through one-time injection molding, solves the defect of secondary encapsulation of the traditional technology, prevents corrosive liquid medicine from entering, prolongs the service life and the use effect of the magnet, and does not need to additionally cut off waste edges during injection molding.
Description
Technical Field
The invention relates to encapsulation, in particular to an integrated encapsulation method and device.
Background
In the magnetic pump industry, the magnet rubber coating technology belongs to the difficult point of the industry, and the traditional technology needs twice injection molding to carry out rubber coating on the magnet because the magnet can not be positioned in a die, and the twice rubber coating can form a gap at the joint, and in the use process, corrosive liquid medicine can enter the inner magnet along the gap, thereby corroding the magnet.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides the integrated rubber coating method and the integrated rubber coating device.
In order to achieve the technical purpose, the invention adopts the following technical scheme: an integrated encapsulation method comprising the steps of:
providing a support outside the product, wherein the support matches the shape of the product to be encapsulated;
arranging a plurality of supporting points on the outer side wall of the supporting piece needing to be encapsulated;
the support piece is placed in an injection mold cavity, a plurality of support points are in contact with the inner wall of the injection mold cavity, so that an injection molding space is formed between the support piece and the inner wall of the injection mold cavity, and molten glue is injected into the injection molding space.
Further, the length of the outer wall of the supporting point from the outer wall where the supporting point is arranged is the thickness of the outer wall which needs to be encapsulated.
Further, the outer surface of the supporting point and the inner wall of the injection mold cavity are matched in shape.
Further, the supporting point is fixedly connected with the supporting piece.
An integrated encapsulation device comprises a support part and a plurality of support points, wherein the support part is arranged on the outer part of a product and is matched with the shape of the product needing encapsulation, and the support points are arranged on the outer side wall of the support part needing encapsulation.
Furthermore, the supporting piece is cylindrical, a through hole with a step surface is formed in the supporting piece, and a product is installed in the through hole.
Further, the supporting point includes a plurality of lower supporting point, a plurality of upper supporting point and a plurality of outer supporting point, the lower supporting point is fixed the lower terminal surface of support, the upper supporting point is fixed the up end of support, outer supporting point is fixed the outer wall of support.
Furthermore, the lower supporting point is in surface contact with the bottom surface of the injection mold cavity, the upper supporting point is in surface contact with the top surface of the injection mold cavity, and the outer supporting point is in surface contact or line contact with the inner side wall of the injection mold cavity.
Further, the supporting piece and the supporting point are both made of plastic materials.
In conclusion, the invention achieves the following technical effects:
1. the suspension state of the magnet is realized by utilizing the supporting piece, a certain space is left outside the magnet, and the space is the space of the rubber coating layer, so that the disposable integrated rubber coating is realized;
2. the magnet is manufactured with a support piece on the magnet, a plurality of support points are designed on the surface of the support piece according to the stress principle, the support piece is placed into an injection mold, the magnet is suspended in the mold by utilizing the positioning action of the support piece and the support points, and then the magnet is subjected to injection molding to complete seamless rubber coating at one time;
3. the invention is a disposable rubber coating, so that no gap is formed on the surface of the magnet, corrosive liquid medicine cannot enter the magnet, the service life of the product is prolonged, and the problem of gap of a secondary injection molding joint in the prior art is solved.
Drawings
FIG. 1 is a schematic view of a support member provided in accordance with an embodiment of the present invention;
FIG. 2 is a schematic view of another angle of the supporting member according to the embodiment of the present invention;
FIG. 3 is a bottom view of FIG. 2;
FIG. 4 is a schematic cross-sectional view AA in FIG. 3;
FIG. 5 is a schematic view of the injection space existing between the support and the inner surface of the injection mold cavity;
FIG. 6 is an external view of the support after injection molding;
FIG. 7 is a schematic view of the internal magnetism after molding;
FIG. 8 is a schematic view of the supporting member in example 2.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
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.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Example 1:
an integrated encapsulation method comprising the steps of: step one to step three:
step one, arranging a supporting piece 1 outside a product, wherein the supporting piece 1 is matched with the shape of the product needing to be encapsulated;
specifically, in the first step, taking the inner magnet of the magnetic pump as an example, the support member 1 is disposed outside the magnet (not shown), of course, the support member 1 is manufactured in advance, and in the field of encapsulating the magnet of the magnetic pump, the magnet is often cylindrical, so that the support member 1 is also cylindrical in this embodiment, of course, the cylindrical shape of this embodiment is only to match the inner magnetic encapsulation shape of the magnetic pump, and the support member 1 can be made into other shapes when encapsulating other products.
Secondly, arranging a plurality of supporting points on the outer side wall of the supporting piece 1 needing to be encapsulated;
in the second step, after the supporting member 1 is sleeved outside the magnet, a plurality of supporting points are arranged on the outer side wall of the supporting member 1, wherein the first supporting point is arranged on the outer side wall of the supporting member 1 which needs to be encapsulated, namely the outer side wall of the product which needs to be encapsulated, for example, the supporting member 1 or the product only needs to be encapsulated on the bottom surface, a plurality of supporting points are arranged on the bottom surface of the supporting member 1, and if each outer side wall needs to be encapsulated, the supporting points are arranged on each outer side wall; secondly, the number of the supporting points is determined according to the size of the rubber coating surface, and the supporting points are used for suspending the supporting piece 1 or the product so as to facilitate rubber coating treatment, so that the number of the supporting points can be one, two or more, only the supporting piece 1 and the product are required to be suspended, and the stability is ensured certainly; thirdly, the outer surface of the supporting point and the inner wall of the injection mold cavity match each other, for example, in this embodiment, the supporting member 1 is cylindrical, and the shape after the magnet is encapsulated is also cylindrical, that is, the injection mold cavity is cylindrical, therefore, when the supporting point is arranged on the upper end surface of the supporting member 1, the upper surface of the supporting point is arranged to be a plane matching with the upper inner wall of the cylindrical injection mold cavity, and when the supporting point is arranged on the lower end surface of the supporting member 1, the lower surface of the supporting point is arranged to be a plane matching with the lower inner wall of the cylindrical injection mold cavity, so that the two positions are plane contact, rather than point contact or line contact, because the supporting member 1 damages the surface of the injection mold cavity under the action of gravity and the force of mold closing when the supporting member 1 is placed in the injection mold cavity and the mold closing is performed, the damaged position of the cover after the injection molding is in a convex point, or line contact, so that the damaged position of the cover appears in a convex point, or line contact, Pits, etc.; when the supporting point is arranged on the outer cylindrical wall of the supporting part 1, the outer surface of the supporting point is set to be a curved surface matched with the inner annular wall of the cylindrical injection molding cavity, the curved surface and the inner annular wall of the injection molding cavity can be in line contact or surface contact, and the position is not stressed, so that the line contact or the surface contact is both in line contact and surface contact, the surface of the injection molding cavity can still be damaged by point contact, and therefore the point contact is avoided as much as possible.
The strong point sets up to the solid form, strengthens the dynamics of support, and the strong point is unsettled with whole support piece for the product becomes unsettled state in the mould inside, and unsettled back upper and lower, left and right all do not contact with the die cavity, when pouring into the melten gel, the melten gel can enclose completely and cover whole support piece 1, forms the structure of integrative rubber coating, eliminates the joint gap that original secondary rubber coating caused.
And step three, placing the support piece 1 in an injection mold cavity, contacting a plurality of support points to the inner wall of the injection mold cavity, so that an injection molding space is formed between the support piece 1 and the inner wall of the injection mold cavity, and injecting molten glue into the injection molding space.
In the third step, after each supporting point is contacted with the surface of the mold cavity, the supporting piece 1 is suspended due to the existence of the supporting points, an injection molding space is formed between the outer surface of the supporting piece 1 and the inner surface of the mold cavity, the injection molding space is the position for encapsulating, and molten glue is injected into the injection molding space to form an encapsulating layer.
It should be noted that the length of the outer wall of the supporting point from the outer wall of the supporting point where the supporting point is arranged is the thickness of the outer wall required to be encapsulated, the thickness of the encapsulation is determined in advance, the length of the supporting point is set in advance, and the subsequent injection molding can be directly performed.
In addition, the supporting point and the supporting part 1 are fixedly connected, and after the encapsulation is finished, the supporting point, the supporting part 1 and the product are jointly wrapped together to form the final encapsulated product. Support piece 1 and strong point are the plastics material, and are the solid form, strengthen the intensity of moulding plastics rubber coating, prevent corrosive liquid entering and overlook from inside.
After the rubber coating is completed, the final rubber coating product formed is a structure with the magnet inside (the magnet is adopted in the embodiment), the support piece and the supporting point in the middle and the injection molding glue melting outside, and when the injection molding glue melting is carried out, the glue melting and the middle plastic support piece are fused into a whole at high temperature, so that the tightness between the support piece and the rubber coating layer is ensured.
The invention also provides an integrated encapsulation device, which comprises a support part 1 and a plurality of support points, wherein the support part 1 is arranged outside a product and is matched with the shape of the product to be encapsulated, and the support points are arranged on the outer side wall of the support part 1 to be encapsulated.
Specifically, for the internal magnetism of the magnetic pump, the supporting member 1 is cylindrical, and a through hole 14 with a step surface is formed inside the supporting member, and the through hole 14 is used for installing a product, namely the internal magnetism of the magnetic pump, or becomes a magnet.
As shown in fig. 1, 2, 3 and 4, the supporting points include a plurality of lower supporting points 11, a plurality of upper supporting points 12 and a plurality of outer supporting points 13, the lower supporting points 11 are fixed on the lower end surface of the support 1, the upper supporting points 12 are fixed on the upper end surface of the support 1, the outer supporting points 13 are fixed on the outer wall of the support 1, and are used for achieving the purpose of supporting the support 1 on three outer side walls of the cylindrical support 1, so that the support 1 and the inner magnet are suspended inside the mold cavity to completely empty the outside of the support 1, and molten glue is injected at the empty position, as shown in fig. 5, the outer dotted line frame is the inner surface of the injection mold cavity, the inner surface of the injection mold cavity is attached to the supporting points, and an injection space exists between the support 1, and the space is used for achieving the purpose of full-coverage encapsulation without seams and cutting edges, as shown in fig. 6, the outer schematic view of the support 1 after injection molding is completed, reference numeral 2 denotes an encapsulating layer.
When the support 1 is actually placed, the lower support points 11 are kept in surface contact with the bottom surface of the injection mold cavity, the upper support points 12 are kept in surface contact with the top surface of the injection mold cavity, and the outer support points 13 are kept in surface contact or line contact with the inner side wall of the injection mold cavity. Specifically, lower support point 11 adopts cylindrically, make the contact surface between lower support point 11 and the die cavity bottom surface of moulding plastics be the plane, it is cylindrical to go up support point 12, make the contact surface between upper support point 12 and the die cavity top surface of moulding plastics be the plane, the plane contact can not produce the damage to die cavity bottom surface of moulding plastics or top surface, outer support point 13 sets up into the curved surface shape, curved surface and the laminating of the cylindrical surface of die cavity of moulding plastics or not laminating, be surface contact during the laminating, be line contact during not laminating, no matter line contact or surface contact, this position does not receive the atress just can not produce the damage to the die cavity inner wall of moulding plastics yet.
Finally, magnet is placed in support piece 1 inside through-hole 14, when moulding plastics the melten gel, can mould plastics magnet jointly for magnet, support piece 1, strong point, rubber coating become an organic whole, the appearance of seam does not have, can not let inside corrosive liquid medicine gets into magnet, prevents to overlook, prolongs the life of magnet.
As shown in fig. 7, which is a schematic diagram of a finished product after encapsulation, an impeller bayonet 3 is arranged on the end surface of the encapsulating layer 2.
Example 2:
as shown in fig. 8, in order to make the connection between the encapsulating layer and the magnet more compact by the supporting member 1, in the invention, the supporting member 1 is provided with the plurality of blind holes 15, when the molten rubber is injected, the molten rubber enters the blind holes 15, so that the encapsulating layer and the supporting member 1 are combined into a whole in a penetration manner, the molten rubber is injected into the plurality of blind holes 15, the tight connection between the encapsulating layer and the supporting member 1 is improved, and the tight connection between the encapsulating layer, the supporting member 1 and the magnet is improved.
Besides, the blind hole 15 is obliquely arranged, the opening of the blind hole 15 is positioned above, the bottom of the blind hole 15 is positioned below, an oblique pattern is formed, and when molten gel is injected, the molten gel can be guaranteed to be filled in the whole blind hole 15.
Example 3:
on the basis of embodiment 2, a connecting channel (not shown) is arranged between the bottoms of the blind holes 15, the molten rubber enters the blind holes 15 and then enters the connecting channel, and the adhesive coating layer of the strip frame formed in the connecting channel is utilized to further improve the tight connection between the adhesive coating layer and the supporting piece 1.
The connecting channels may be regular, for example, one connecting channel is shared by blind holes 15 in a row, or irregular, for example, one connecting channel is shared by a part of blind holes 15, and one or more connecting channels are shared by the rest blind holes 15, so as to form staggered channels.
Example 4:
on the basis of the embodiment 2 or the embodiment 3, the bottoms of a part of the blind holes 15 are communicated with the interior of the lower supporting point 11 and the interior of the outer supporting point 13, so that the tight connection between the encapsulating layer and the supporting piece 1 is further improved.
Example 5:
on the basis of the embodiment 1, the upper supporting point 12 is solid; the lower supporting point 11 is hollow, and the lower supporting point 11 is provided with an opening positioned at the upper side, so that molten glue can be conveniently injected; outer supporting point 13 is hollow, and outer supporting point 13 is equipped with an opening and is located the upside, and the melten gel of being convenient for pours into, and simultaneously, outer supporting point 13 is equipped with an export, and the melten gel of being convenient for and the intercommunication between the space of moulding plastics for the melten gel circulation strengthens intensity and stability.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention in any way, and all simple modifications, equivalent variations and modifications made to the above embodiments according to the technical spirit of the present invention are within the scope of the technical solution of the present invention.
Claims (9)
1. An integrated encapsulation method is characterized in that: the method comprises the following steps:
arranging a support (1) outside the product, wherein the support (1) matches the shape of the product to be encapsulated;
arranging a plurality of supporting points on the outer side wall of the supporting piece (1) needing to be encapsulated;
the method comprises the following steps of placing the support piece (1) in an injection mold cavity, enabling a plurality of support points to be in contact with the inner wall of the injection mold cavity, enabling an injection molding space to be formed between the support piece (1) and the inner wall of the injection mold cavity, and injecting molten glue into the injection molding space.
2. The integrated encapsulation method according to claim 1, wherein: the distance between the outer wall of the supporting point and the outer wall of the supporting point is set to be the thickness of the outer wall which needs to be encapsulated.
3. The integrated encapsulation method according to claim 2, wherein: the outer surface of the supporting point is matched with the shape of the inner wall of the injection mold cavity.
4. A one-piece encapsulation method according to claim 3, wherein: the supporting point is fixedly connected with the supporting piece (1).
5. An integral type rubber coating device which characterized in that: the product encapsulation device comprises a support part (1) and a plurality of supporting points, wherein the support part (1) is arranged outside a product and is matched with the shape of the product to be encapsulated, and the supporting points are arranged on the outer side wall of the support part (1) to be encapsulated.
6. The integrated encapsulated apparatus of claim 5, wherein: the supporting piece (1) is cylindrical, a through hole (14) with a step surface is formed in the supporting piece, and a product is installed in the through hole (14).
7. The integrated encapsulated apparatus of claim 6, wherein: the supporting point comprises a plurality of lower supporting points (11), a plurality of upper supporting points (12) and a plurality of outer supporting points (13), the lower supporting points (11) are fixed on the lower end face of the supporting piece (1), the upper supporting points (12) are fixed on the upper end face of the supporting piece (1), and the outer supporting points (13) are fixed on the outer wall of the supporting piece (1).
8. The integrated encapsulated apparatus of claim 7, wherein: the lower supporting points (11) are in surface contact with the bottom surface of the injection molding die cavity, the upper supporting points (12) are in surface contact with the top surface of the injection molding die cavity, and the outer supporting points (13) are in surface contact or line contact with the inner side wall of the injection molding die cavity.
9. The integrated encapsulated apparatus of claim 8, wherein: the supporting piece (1) and the supporting point are made of plastic materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111412177.9A CN114102976B (en) | 2021-11-25 | 2021-11-25 | Integrated encapsulation method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111412177.9A CN114102976B (en) | 2021-11-25 | 2021-11-25 | Integrated encapsulation method and device |
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| CN114102976A true CN114102976A (en) | 2022-03-01 |
| CN114102976B CN114102976B (en) | 2024-07-23 |
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| CN214000304U (en) * | 2020-12-10 | 2021-08-20 | 瑞晟新能源科技(广东)有限公司 | Injection mold for preventing large-area metal part from being deformed in rubber coating process and rubber coating product |
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| CN114102976B (en) | 2024-07-23 |
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