CN108162302B - Injection molding piece, injection molding method thereof and waterproof equipment - Google Patents
Injection molding piece, injection molding method thereof and waterproof equipment Download PDFInfo
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- CN108162302B CN108162302B CN201711415259.2A CN201711415259A CN108162302B CN 108162302 B CN108162302 B CN 108162302B CN 201711415259 A CN201711415259 A CN 201711415259A CN 108162302 B CN108162302 B CN 108162302B
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- injection molding
- sealing structure
- scarf joint
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- injection
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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
- B29C45/14778—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
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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
- B29C45/0025—Preventing defects on the moulded article, e.g. weld lines, shrinkage marks
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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
- B29C2045/1486—Details, accessories and auxiliary operations
- B29C2045/14893—Preventing defects relating to shrinkage of inserts or coating material
Abstract
The invention discloses an injection molding part, an injection molding method thereof and waterproof equipment. The plastic part is provided with a first embedded part. The hardware insert is embedded in the plastic part, a second embedding part is arranged on the hardware insert corresponding to the first embedding part, and a gap is formed between the second embedding part and the first embedding part. The sealing structure is fixedly arranged on the second embedding part and tightly pressed between the second embedding part and the first embedding part so as to fill the gap. The injection molding part provided by the embodiment of the invention has good sealing property, good waterproof effect and simple molding process. The injection molding method of the injection molding part adopts an insert molding process, and the injection molding part is injection molded by using the hardware insert and the sealing structure as inserts. The injection molding method has simple and convenient injection molding process, and is beneficial to reducing the process cost and shortening the production period.
Description
Technical Field
The invention relates to the technical field of injection molding, in particular to an injection molding piece, an injection molding method and waterproof equipment thereof.
Background
At present, an insert molding process is a common process means for manufacturing injection molding parts wrapped with hardware inserts, the hardware inserts are embedded into a mold by reserving the positions of the hardware inserts on the mold, then molten plastic materials are injected into the mold, and the injection molding parts are obtained by demolding. However, before demolding, the hardware insert is heated to expand, the plastic part expands due to being in a high-temperature state, and in the process of cooling to the normal temperature after demolding, the hardware insert contracts towards the geometric center of the hardware insert and the plastic part also contracts towards the geometric center of the plastic part. When the injection-molded part is applied to a waterproof product, water can enter the product from these gaps, resulting in a great reduction in the waterproof performance of the product.
Therefore, in order to solve the waterproof problem of injection molding, when the injection molding, the scarf joint department of five metals inserts and plastic part sets up the trench in the mould usually for injection molding after the shaping forms some glue grooves in scarf joint department, then carries out some glue processing in some glue grooves again, in order to prevent that water from getting into. However, with the above method, not only is the injection molding process flow of the injection molded part increased, but also other equipment (such as a dispenser) is required to perform dispensing after molding, which greatly increases the process cost and the equipment cost. In addition, because the gap is very small, when the dispensing machine is used for dispensing, glue overflow is easy to occur, so that the glue overflow position needs to be processed, and the problems of complex process, long production period and low product yield are caused.
Disclosure of Invention
The embodiment of the invention discloses an injection molding piece, an injection molding method and waterproof equipment thereof.
In order to achieve the above object, the present invention provides, in a first aspect, an injection molded part comprising
The plastic part is internally provided with a first embedded part;
the hardware insert is embedded in the plastic part, a second embedding part is arranged on the hardware insert corresponding to the first embedding part, and a gap is formed between the second embedding part and the first embedding part; and
and the sealing structure is fixedly arranged on the second scarf joint part and is tightly pressed between the second scarf joint part and the first scarf joint part so as to fill the gap.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, a groove annularly disposed around a center of the second mating portion is formed on the second mating portion, a part of the sealing structure is fixedly disposed in the groove, and another part of the sealing structure is exposed out of the groove and is pressed against the first mating portion.
As an alternative implementation manner, in an embodiment of the first aspect of the present invention, the sealing structure is integrally formed at the second scarf joint part, and a compression amount of the sealing structure compressed between the second scarf joint part and the first scarf joint part is greater than or equal to a width of the gap.
As an optional implementation manner, in an embodiment of the first aspect of the present invention, the sealing structure is a sealing ring, and the material of the sealing structure is silica gel or rubber.
As an alternative implementation, in an embodiment of the first aspect of the present invention, the plastic part is formed by an insert molding process, and the insert includes the hardware insert and the sealing structure.
As an alternative, in an embodiment of the first aspect of the present invention, during the molding process of the plastic part, a portion of the sealing structure pressed against the first scarf joint part is integrally molded with the first scarf joint part.
In a second aspect, the present invention also provides a method of injection moulding an injection moulded part as described above, the method comprising the steps of:
arranging a sealing structure on the hardware insert to form an insert;
inserting the insert into an inner cavity of a first mold;
and injecting molten plastic material into the inner cavity of the first mold and solidifying to form the injection molding piece.
As an optional implementation manner, in an embodiment of the second aspect of the present invention, the step of providing the sealing structure on the hardware insert and forming the insert specifically includes the following steps:
a groove which is annularly arranged around the center of the hardware insert is formed in the hardware insert;
and fixedly arranging the sealing structure in the groove.
As an optional implementation manner, in an embodiment of the second aspect of the present invention, the step of providing the sealing structure on the hardware insert and forming the insert specifically includes the following steps:
a groove which is annularly arranged around the center of the hardware insert is formed in the hardware insert;
fixing the hardware insert in an inner cavity of a second die;
injecting molten material into the cavity of the second mold and solidifying to form the seal structure within the recess.
In a third aspect, the invention also provides a waterproof device comprising an injection molded part as described above.
The injection molding part comprises a plastic part, a hardware insert and a sealing structure, and a first embedded part is arranged in the plastic part; the hardware insert is embedded in the plastic part, a second embedding part is arranged on the hardware insert corresponding to the first embedding part, and a gap is formed between the second embedding part and the first embedding part; the sealing structure is fixedly arranged on the second scarf joint part and is tightly pressed between the second scarf joint part and the first scarf joint part so as to fill the gap.
As an optional implementation manner, in an embodiment of the third aspect of the present invention, a groove annularly disposed around a center of the second mating portion is formed on the second mating portion, a part of the sealing structure is fixedly disposed in the groove, and another part of the sealing structure is exposed out of the groove and is pressed against the first mating portion.
As an alternative, in an embodiment of the third aspect of the present invention, the sealing structure is integrally formed on the second scarf joint part, and a compression amount of the sealing structure compressed between the second scarf joint part and the first scarf joint part is greater than or equal to a width of the gap.
As an optional implementation manner, in an embodiment of the third aspect of the present invention, the sealing structure is a sealing ring, and the material of the sealing structure is silica gel or rubber.
As an alternative, in an embodiment of the third aspect of the present invention, the plastic part is formed by an insert molding process, and the insert includes the hardware insert and the sealing structure.
As an alternative, in an embodiment of the third aspect of the present invention, during the molding process of the plastic part, the portion of the sealing structure pressed against the first scarf joint part is integrally molded with the first scarf joint part.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the injection molding piece provided by the embodiment of the invention, the sealing structure is fixedly arranged on the second scarf joint part of the hardware insert, and is tightly pressed between the second scarf joint part and the first scarf joint part of the plastic part, so that the gap between the first scarf joint part and the second scarf joint part can be filled with the sealing structure, and further good sealing and waterproof effects are achieved.
In addition, the injection molding method of the injection molding part provided by the embodiment of the invention adopts an insert molding process, utilizes the hardware insert and the sealing structure as the inserts, and utilizes the elastic deformation performance of the sealing structure in the injection molding process of the injection molding part to fill the gap between the hardware and the plastic material, so that the sealing effect of the molded injection molding part is ensured, and the injection molding process is simple and convenient, and is beneficial to reducing the process cost and shortening the production period.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic illustration of a disclosed injection molded part according to an embodiment of the invention;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a flowchart of a method for injection molding of an injection molded part according to a second embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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 the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "center", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are used primarily to better describe the invention and its embodiments and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.
Moreover, some of the above terms may be used to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. The specific meanings of these terms in the present invention can be understood by those skilled in the art as appropriate.
Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meanings of the above terms in the present invention can be understood by those of ordinary skill in the art according to specific situations.
Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.
The injection molding part, the injection molding method thereof and the waterproof device provided by the embodiment of the invention will be described in detail with reference to the accompanying drawings.
Example one
Referring to fig. 1 and fig. 2, a schematic structural diagram of an injection-molded part according to an embodiment of the present invention is shown. This injection molding includes the injection molding includes plastic part 1, five metals inserts 2 and seal structure 3. The plastic component 1 is provided with a first engaging portion 11. This five metals inserts 2 inlays and locates in plastic part 1, and the last first scarf joint portion 11 that corresponds of five metals inserts 2 is equipped with second scarf joint portion 21, and has the clearance between second scarf joint portion 21 and the first scarf joint portion 11, promptly, second scarf joint portion 21 inlays and locates in the first scarf joint portion 11. The sealing structure 3 is fixedly arranged on the second embedded part 21, and the sealing structure 3 is tightly pressed between the second embedded part 21 and the first embedded part 11 to fill the gap.
The second engaging portion 21 is disposed at a position of the metal insert 2 corresponding to the first engaging portion 11, that is, when the metal insert 2 is inserted into the plastic part 1, the second engaging portion 21 and the first engaging portion 11 are disposed corresponding to each other.
Adopt above-mentioned design, seal structure 3 and first scarf joint portion 11 and the inseparable pressfitting of second scarf joint portion 21, promptly, this injection molding makes plastic part 1 and the inseparable pressfitting of five metals inserts 2 through seal structure 3, is favorable to guaranteeing the leakproofness of this injection molding, and then can avoid water to pass from the clearance, and water-proof effects is good.
In this embodiment, plastic part 1 adopts the shaping of insert molding process, and the inserts include foretell five metals inserts 2 and seal structure 3, promptly, the inside shaping shape of plastic part 1 and the shape of five metals inserts 2 and the shape phase-match of seal structure 3 to make plastic part 1 can realize through seal structure 3 with the seamless laminating of five metals inserts 2, thereby improve the waterproof performance of this injection molding.
As an embodiment, when the sealing structure 3 is disposed on the second fitting portion 21, a groove 22 disposed annularly around the center of the second fitting portion 21 may be formed on the second fitting portion 21, a part of the sealing structure 3 may be fixed in the groove 22, and another part of the sealing structure 3 may be exposed from the groove 22 and pressed against the first fitting portion 11.
The design that sets up recess 22 on second scarf joint portion 21 is adopted, can play the effect of location to seal structure 3, is favorable to fixed seal structure 3's position, and then avoids seal structure 3 to remove relative second scarf joint portion 21 and lead to the unable condition of filling the clearance between first scarf joint portion 11 and the second scarf joint portion 21 completely.
Further, the inner diameter of the sealing structure 3 is smaller than the outer diameter of the second engagement portion 21 of the hardware insert 2, so that the sealing structure 3 can be always firmly sleeved on the second engagement portion 21 (when the groove 22 is formed on the second engagement portion 21, the sealing structure 3 is sleeved on the position where the groove 22 is formed on the second engagement portion 21, and the sealing structure 3 is located in the groove 22). By adopting the mode, the interference fit between the sealing structure 3 and the hardware insert 2 can be realized, so that the sealing structure 3 can be effectively ensured to be firmly fixed on the hardware insert 2, and the separation of the sealing structure 3 and the hardware insert 2 or the displacement of the sealing structure 3 relative to the hardware insert 2 is avoided.
As another embodiment, the sealing structure 3 may be integrally formed on the second mating portion 21, so as to reduce the assembly process of the sealing structure 3 and the second mating portion 21 and further ensure the connection tightness between the sealing structure 3 and the second mating portion 21.
In this embodiment, the sealing structure 3 may be a sealing ring, and the material of the sealing structure 3 may be silica gel or rubber. Because silica gel, rubber all have good elastic deformation performance, consequently, when seal structure 3 that has elastic deformation performance compresses tightly between first scarf joint portion 11 and second scarf joint portion 21, can be favorable to first scarf joint portion 11 and second scarf joint portion 21 to produce the squeezing action to seal structure 3 for seal structure 3 fills the clearance of first scarf joint portion 11 and second scarf joint portion 21 completely, and then improves the leakproofness of this injection molding.
Specifically, since the sealing structure 3 is made of a material having high elasticity, the sealing structure 3 has a certain deformation range, that is, the sealing structure 3 has a compression amount capable of being compressed when being compressed. Preferably, when the sealing structure 3 is compressed between the second engagement portion 21 and the first engagement portion 11, the compression amount of the sealing structure 3 is greater than or equal to the width of the gap, so as to ensure that the sealing structure 3 completely fills the gap, thereby further ensuring the sealing performance of the injection molding. Further, in the molding process of the plastic part 1, the portion of the sealing structure 3 pressed against the first caulking part 11 is integrally molded with the first caulking part 11. That is, during the molding process of the plastic part 1, the portion of the sealing structure 3 pressed against the first engaging portion 11 is integrally cured with the first engaging portion 11. Adopt above-mentioned design, can ensure seamless laminating between seal structure 3 and the first portion 11 that inlays, effectively ensure the sealing performance of the injection molding after the shaping.
According to the injection molding piece provided by the embodiment of the invention, the groove 22 is formed in the hardware insert 2, and the sealing structure 3 is integrally formed in the groove 22, so that the sealing structure 3 can be prevented from displacing relative to the hardware insert 2, and the waterproof performance of the injection molding piece can be improved.
Example two
Referring to fig. 1 to 3, a second embodiment of the present invention provides a method for injection molding of an injection molded article, the method for injection molding of the injection molded article, the method comprising the following steps:
s1: and a sealing structure is arranged on the hardware insert to form the insert.
In this step, the method specifically comprises the following steps:
s11: the hardware insert is provided with a groove which is annularly arranged around the center of the hardware insert.
By adopting the design of the groove 22, the sealing structure 3 can be positioned, which is beneficial to fixing the position of the sealing structure 3.
Further, the inner diameter of the sealing structure 3 is smaller than the outer diameter of the second engagement portion 21 of the hardware insert 2, so that the sealing structure 3 can be always firmly sleeved on the second engagement portion 21 (when the groove 22 is formed on the second engagement portion 21, the sealing structure 3 is sleeved on the position where the groove 22 is formed on the second engagement portion 21, and the sealing structure 3 is located in the groove 22). By adopting the mode, the interference fit between the sealing structure 3 and the hardware insert 2 can be realized, so that the sealing structure 3 can be effectively ensured to be firmly fixed on the hardware insert 2, and the separation of the sealing structure 3 and the hardware insert 2 or the displacement of the sealing structure 3 relative to the hardware insert 2 is avoided.
S12: and fixedly arranging the sealing structure in the groove.
That is, as an alternative embodiment, when the sealing structure 3 is a gasket, the gasket is fitted into the groove 22.
As another alternative embodiment, hardware insert 2 is inserted into the cavity of a second mold, into which molten material is injected and solidified to form seal structure 3 within groove 22.
With the above design, the sealing structure 3 is integrally formed on the second engagement portion 21, so that the assembling process of the sealing structure 3 and the second engagement portion 21 is reduced.
S2: the insert is inserted into an inner cavity of a first mold.
In this step, when the insert is inserted into the cavity of the first mold, a position for installing the insert may be preset in the cavity of the first mold, and then the insert is installed in the preset position and fixed, thereby preventing the insert from being displaced during the injection molding process to cause deformation of the injection molded part.
S3: and injecting molten plastic material into the inner cavity of the first mold and solidifying to form the injection molding piece.
In this step, the method specifically comprises the following steps:
s31: and injecting the molten plastic material into a gate of the first mold until the molten plastic material fills the inner cavity of the first mold, and solidifying the molten plastic material to form a plastic part.
Specifically, the molten plastic material is injected from the gate of the injection molding machine towards the side wall of the first mold, so that the molten plastic material injected into the inner cavity is prevented from being injected towards the sealing structure 3, and the sealing structure 3 is prevented from displacing relative to the hardware insert 2 in the injection molding process of the injection molding part.
In this step, when the pressure in the cavity of the first mold is reduced, the molten plastic material is continuously injected into the gate so that the pressure in the cavity is kept constant.
S32: and opening the first mold, and taking the cured plastic part containing the insert out of the first mold.
S33: and cooling the plastic part and the insert to normal temperature, wherein the plastic part and the insert form the injection molding part.
Specifically, as shown in fig. 1 and 2, the molded injection molded part includes a plastic part 1, a metal insert 2, and a sealing ring. The plastic component 1 is provided with a first engaging portion 11. In this five metals inserts 2 inlayed and located plastic part l, the last corresponding first scarf joint portion 11 of five metals inserts 2 is equipped with second scarf joint portion 21, has the clearance between second scarf joint portion 21 and the first scarf joint portion 11, promptly, second scarf joint portion 21 inlays and locates in the first scarf joint portion 11. The sealing structure 3 is fixedly arranged on the second embedded part 21, and the sealing structure 3 is tightly pressed between the second embedded part 21 and the first embedded part 11 to fill a gap, so that the sealing performance of the injection molding part is ensured.
Further, the sealing structure 3 may be a sealing ring, and the material of the sealing structure 3 is silica gel or rubber. Silica gel, rubber all have good elasticity, utilize to be favorable to first scarf joint portion 11 and second scarf joint portion 21 to produce the extrusion to seal structure 3 with elastic seal structure 3 material to make seal structure 3 fill the clearance of first scarf joint portion 11 and second scarf joint portion 21 completely, and then improved the leakproofness of this injection molding.
Specifically, because seal structure 3 adopts silica gel or rubber material, silica gel, rubber have good elastic deformation performance, so, in the in-process that the molten plastic material solidification formed the injection molding, seal structure 3 can take place deformation according to the environmental aspect of being located.
After injecting into fused plastic material, the inserts and fused plastic material contact, and five hardware inserts 2 thermal expansion sets firmly seal structure 3 on five hardware inserts 2 and also enlarges outside its own geometric centre along with the inflation of five hardware inserts 2, makes seal structure 3 be close to and contact with the plastic material to the plastic material that is in the solidification process, and along with the in-process that the plastic material solidifies gradually and forms plastic part 1, the plastic material of solidification produces the squeezing action to seal structure 3. In-process at plastic part 1 and inserts cooling to normal atmospheric temperature, the shrink of five inserts 2 cooling, seal structure 3 contracts along with the shrink of five inserts 2, plastic part 1 also cools off the shrink, but the shrink direction of plastic part 1 is opposite with the shrink direction of five inserts 2 and seal structure 3, make to have the clearance between seal structure 3 and the plastic part 1, at this moment, seal structure 3 does not receive the squeezing action of plastic part 1, seal structure 3 enlarges to the clearance between first scarf joint portion 11 and the second scarf joint portion 21 completely to its own geometric centre because the atress reduces.
It should be noted that during the curing of the plastic material, the sealing structure 3 is subjected to the injection pressure in the cavity and shrinks towards its geometric centre.
In the injection molding process of the injection molding part, the elasticity of the sealing structure 3 is utilized, the plastic part 1 and the hardware insert 2 can be in a heating or cooling environment and can be subjected to corresponding state change, so that the sealing structure 3 is subjected to corresponding deformation (contraction or expansion), and further, after the injection molding part is molded, the sealing structure 3 can be completely filled in a gap between the first embedding part 11 and the second embedding part 21, so that the sealing structure 3 is seamlessly connected with the first embedding part 11 and the second embedding part 21.
In order to further ensure the sealing performance of the injection molding part, the compression amount of the sealing structure 3 compressed between the second embedded part 21 and the first embedded part 11 is larger than or equal to the width of the gap, so as to ensure that the sealing structure 3 completely fills the gap.
Further, in the molding process of the plastic part 1, the portion of the sealing structure 3 pressed against the first caulking part 11 is integrally molded with the first caulking part 11.
Specifically, when the injection molding machine injects the molten plastic material into the first mold, the molten plastic material contacts the surface of the sealing structure 3, so that the sealing structure 3 is heated and the surface portion of the sealing structure 3 is molten, and the molten portion of the surface of the sealing structure 3 is melted and solidified with the molten plastic material to form a whole. Adopt above-mentioned design, seamless laminating between seal structure 3 and the first portion 11 that inlays connects, further plays the positioning action to seal structure 3 simultaneously.
According to the injection molding method of the injection molding part provided by the embodiment of the invention, the insert molding process is adopted, the hardware insert 2 and the sealing structure 3 are used as inserts, and the elastic deformation performance of the sealing structure 3 is utilized in the injection molding process of the injection molding part to fill the gap between the hardware insert 2 and the plastic material, so that the sealing effect of the molded injection molding part is ensured, and the injection molding process is simple and convenient, and is beneficial to reducing the process cost and shortening the production period.
EXAMPLE III
The waterproof device provided by the third embodiment of the invention comprises the injection molding part. Because the injection molding has good sealing performance, the waterproof equipment also has good sealing and waterproof performance.
This waterproof equipment can be but not be restricted to intelligent wearing equipment (like intelligent wrist-watch, smart glasses etc.), mobile terminal (cell-phone, flat board etc.), and this injection molding can regard as waterproof equipment's shell to reach good water-proof effects.
The injection molding part, the injection molding method thereof and the waterproof device disclosed by the embodiment of the invention are described in detail, a specific example is applied in the description to explain the principle and the embodiment of the invention, and the description of the embodiment is only used for helping to understand the injection molding part, the injection molding method thereof, the waterproof device and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (5)
1. An injection molding, characterized in that, the injection molding is applied to waterproof equipment, the injection molding includes
The plastic part is internally provided with a first embedded part;
the hardware insert is embedded in the plastic part, a second embedding part is arranged on the hardware insert corresponding to the first embedding part, and a gap is formed between the second embedding part and the first embedding part; and
the sealing structure is fixedly arranged on the second scarf joint part and is tightly pressed between the second scarf joint part and the first scarf joint part, the plastic part is molded by adopting an insert molding process, the insert comprises the hardware insert and the sealing structure, and the sealing structure can deform according to the environment condition of the plastic part in the molding process of the plastic part so as to fill the gap;
offer on the second scarf joint portion and wind the center of second scarf joint portion is the recess that the annular set up, seal structure is through inlaying and being equipped with injection molten material and solidification in the inner chamber of hardware insert's mould, with form in the recess seal structure, so that seal structure with second scarf joint portion integrated into one piece, the seal structure part exposes the recess and the plastic part injection moulding in-process with first scarf joint portion melting integrated into one piece and with form integratively behind the solidification of first scarf joint portion.
2. The injection molding of claim 1, wherein the sealing structure is integrally formed with the second scarf joint, and the amount of compression of the sealing structure between the second scarf joint and the first scarf joint is greater than or equal to the width of the gap.
3. The injection molding of claim 2, wherein the sealing structure is a sealing ring and the sealing structure is made of silicone or rubber.
4. A method for injection molding of injection molded parts, characterized in that the method is used for molding injection molded parts according to any of claims 1 to 3, the method comprising the steps of:
the plastic part injection molding device is characterized in that a groove which is annularly arranged around the center of the hardware insert is formed in the hardware insert, a molten material is injected into an inner cavity of a mold in which the hardware insert is embedded and is solidified, so that the sealing structure is formed in the groove and integrally formed with the second embedding part, and the sealing structure partially exposes out of the groove and is integrally formed with the first embedding part in the plastic part injection molding process and is integrally formed with the first embedding part after being solidified;
inserting the insert into an inner cavity of a first mold;
injecting molten plastic material into the inner cavity of the first mold and solidifying to form the injection molded part;
in the process of forming the injection molding by solidifying the molten plastic material, the sealing structure can deform according to the environment condition.
5. A waterproof device comprising the injection-molded article according to any one of claims 1 to 3.
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| CN201711415259.2A CN108162302B (en) | 2017-12-21 | 2017-12-21 | Injection molding piece, injection molding method thereof and waterproof equipment |
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| CN201711415259.2A CN108162302B (en) | 2017-12-21 | 2017-12-21 | Injection molding piece, injection molding method thereof and waterproof equipment |
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| CN108162302A CN108162302A (en) | 2018-06-15 |
| CN108162302B true CN108162302B (en) | 2021-04-30 |
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| CN108916380A (en) * | 2018-08-07 | 2018-11-30 | 南安闽塑卫浴有限公司 | One kind inlaying tube sealing device and its processing technology |
| CN113681817A (en) * | 2021-08-18 | 2021-11-23 | 惠州市重信实业有限公司 | Hardware ring embedding process and embedding structure thereof |
| CN115139445B (en) * | 2022-06-30 | 2023-12-01 | 深圳市中孚能电气设备有限公司 | Injection molding structure and miner's lamp |
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| FR2860279B1 (en) * | 2003-09-26 | 2008-11-28 | Inergy Automotive Systems Res | SEALED COMPOSITE CONDUIT, PROCESS FOR MANUFACTURING THE SAME AND SYSTEM FOR SUPPLYING AN INTERNAL COMBUSTION ENGINE |
| CN106094500A (en) * | 2016-08-23 | 2016-11-09 | 广东小天才科技有限公司 | A kind of waterproof construction of intelligent watch charging terminal |
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