KR20150051736A

KR20150051736A - Insert molding apparatus for seal

Info

Publication number: KR20150051736A
Application number: KR1020130133615A
Authority: KR
Inventors: 박종영
Original assignee: 박종영
Priority date: 2013-11-05
Filing date: 2013-11-05
Publication date: 2015-05-13

Abstract

The present invention relates to a molding apparatus which can perform high-density molding through resin pressurizing and supplying means for pressurizing and supplying a molten resin to a cavity formed between a lower mold and an upper mold, And a waterproof member is integrally formed on the insert body, thereby introducing a high-quality waterproof member to a variety of electronic product cases requiring a high waterproof rating (IPX 7 or higher), while securing the mass productivity and intense price competitiveness unique to electronic products And more particularly, to an insert molding apparatus for an integral type waterproof member.
An insert molding apparatus for an integral type waterproof member according to the present invention includes: a lower mold having a first forming part on a top; An upper mold coupled to the lower mold and forming a cavity with the first forming unit through a second forming unit provided at a lower portion; An upper mold or a lower mold for discharging the molded body, or both of them; And resin pressurizing and supplying means for pressurizing and supplying the molten resin to the actual cavity between the first molding portion and the second molding portion, or both, and the insert body arranged in the cavity.

Description

[0001] INSERT MOLDING APPARATUS FOR SEAL [0002]

The present invention relates to an insert molding apparatus for an integral waterproof member,

More particularly, the present invention relates to a molding apparatus capable of high-density molding through resin pressurizing and supplying means for pressurizing and supplying a molten resin to a cavity formed between a lower mold and an upper mold, High-quality waterproofing member is introduced into various electronic product cases requiring a high water-proof grade (IPX 7 or higher) by arranging a sieve body and integrally forming a waterproof member on the insert body, To an insert molding apparatus of an integral type waterproof member.

Various mold apparatuses or molding apparatuses have heretofore been proposed.

Among them, using the resin pressurizing and supplying means for pressurizing and supplying the molten resin to the cavity of the mold

Patent Registration No. 10-0113803 (registered April 03, 1997) [Manifold of an injection molding machine in which an electric heating wire is embedded]

The present invention relates to a manifold capable of smoothly supplying a synthetic resin when a molten synthetic resin is injected into a cavity of a mold in an injection molding machine, and in particular, a molten synthetic resin is injected into a mold through a manifold through a transfer screw in a hopper And a manifold of an injection molding machine in which an electric heating wire is embedded in the upper and lower surfaces of the manifold so that the molten state can be continuously maintained,

A technique for a common injection molding machine including a cylinder having a screw for supplying a molten resin can be confirmed.

In addition, there is a utility model registration No. 20-0172928 (registration date December 15, 1999) [injection mold]

The above-mentioned registration design can provide a technique of preventing a gap from being generated between a product solidified in the injection-molded mold and a take-out member which is pushed out from the mold, and also general technical matters can be confirmed.

Furthermore, there is a patent registration No. 10-0556578 (registered on Feb. 23, 2006) (a silicone product molding apparatus having an air blowing structure)

The patent discloses that a product formed by a mold frame from a core of a mold for molding a silicone product of a special shape can be quickly taken out as a predetermined air injection pressure while minimizing damage to the product Technology.

In addition, there is a patent registration No. 10-1158740 (registration date June 15, 2012) [injection mold]

The above-mentioned patent relates to a three-stage injection mold in which a runner and a sprue, which are derived during injection molding, are automatically removed without depending on a manual operation of a robot or an operator.

However, all of the conventional techniques are not related to a technique of arranging a preformed insert body by injection or the like in a cavity between upper and lower dies and forming a new formed body (D: waterproof member) integrally with the insert body.

In addition, in the conventional various insert molding methods, an insert molding apparatus capable of precise molding without damaging the molded insert body can not be realized.

The present invention relates to a molding apparatus capable of high-density molding through a resin pressurizing supply means for pressurizing and supplying a molten resin to a cavity formed between a lower mold and an upper mold, and a molding apparatus capable of high- Quality waterproofing member is integrally introduced into various electronic product cases requiring a high waterproof rating (IPX 7 or more) by integrally forming a waterproof member on the insert body, And an object of the present invention is to provide an insert molding apparatus of an integral waterproof member that is optimized for ensuring cost competitiveness.

In addition, the present invention provides an insert molding of an integral waterproofing member in which a first elastic body is introduced into a spacing space between a mold and a movable means for moving a mold so as to enable accurate molding without damaging the molded insert body, And an object of the present invention is to provide a device.

Further, according to the present invention, a second elastic body is further introduced into an installation space formed between the lower metal mold and the base, and thereby a more complete and precise waterproofing member can be formed and the safety of the insert can be improved. And an object of the present invention is to provide an insert molding apparatus for a waterproof member.

In the present invention, the displacement of the lower mold that is sandwiched by the second elastic body is equal to the maximum thickness of the insert body arranged in the cavity, so that leakage of the resin (including silicon) And an insert molding apparatus of an integral type waterproof member which can prevent damage of the insert body most completely.

According to an aspect of the present invention, there is provided an insert molding apparatus for an integral type waterproof member,

A lower mold having a first forming part on the upper part;

An upper mold coupled to the lower mold and forming a cavity with the first forming unit through a second forming unit provided at a lower portion;

An upper mold or a lower mold for discharging the molded body, or both of them; And

Resin pressurizing supply means for pressurizing and supplying the molten resin to the actual cavity between the first molding portion and the second molding portion, or both, and the insert body arranged in the cavity;

.

In the insert molding apparatus of the integral waterproof member according to the present invention,

Wherein the movable unit includes a relay body that presses the upper mold and has a spacing space between the upper mold and the upper mold,

A first elastic body is further provided between the relay body and the upper mold,

Further comprising: a base having a stopper arranged at a lower portion of the lower mold with an installation space; and a second elastic body arranged in the installation space,

The displacement of the lower mold that is sandwiched by the second elastic body is preferably equal to the maximum thickness of the insert arranged in the cavity.

The insert molding apparatus of the integral type waterproof member according to the present invention is capable of high-density molding through resin pressurizing and supplying means for pressurizing and supplying the molten resin to the cavity formed between the lower mold and the upper mold, A high-quality waterproof member is integrally introduced into various electronic product cases requiring a high water-proof grade (IPX 7 or higher) by arranging a molded insert body by applying the device, and integrally forming a waterproof member on the insert body, It is possible to provide a technology optimized for mass productivity and firm price competitiveness unique to an electronic product and to introduce a first elastic body into a spacing space between a movable means for moving a mold and a mold, So that there is no problem in securing the waterproof property, and furthermore, The second elastic body is further introduced into the installation space formed between the first and second elastic bodies to improve the function of forming a more perfect and precise waterproof member and the safety of the insert body, The displacement of the lower mold is made to be equal to the maximum thickness of the insert body arranged in the cavity to prevent the leakage of the resin (including silicon) constituting the waterproof member from the source, thereby enhancing the molding quality, .

1 is a schematic cross-sectional view of an insert molding apparatus of an integral waterproof member according to the present invention.
Fig. 2 is a view of a mobile phone battery cover manufactured by the insert molding apparatus of the integral waterproof member of Fig. 1; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the accompanying drawings.

While the present invention has been described in connection with certain embodiments, it is obvious that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. It is to be understood, however, that the invention is not intended to be limited to the particular forms disclosed, but on the contrary, is intended to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In the drawings, the same reference numerals are used for the same reference numerals, and in particular, the numerals of the tens and the digits of the digits, the digits of the tens, the digits of the digits and the alphabets are the same, Members referred to by reference numerals can be identified as members corresponding to these standards.

In the drawings, the components are expressed by exaggeratingly larger (or thicker) or smaller (or thinner) in size or thickness in consideration of the convenience of understanding, etc. However, It should not be.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the term " comprising " or " consisting of ", or the like, refers to the presence of a feature, a number, a step, an operation, an element, a component, But do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as either ideal or overly formal in the sense of the present application Do not.

It is to be understood that the first to second aspects described in the present specification are merely referred to in order to distinguish between different components and are not limited to the order in which they are manufactured, It may not match.

As shown in FIG. 1, the insert molding apparatus M of the integral waterproof member according to the present invention basically comprises a lower mold 20, an upper mold 30, a mold moving means, .

The resin pressurization supply means application of a molding apparatus capable of manufacturing a high-quality molded body, in particular, a waterproof member, and capable of introducing a multi-cavity capable of achieving mass productivity and thus cost competitiveness.

As the resin pressurizing supply means, a known screw type cylinder or various press cylinders can be utilized, and molten resin can be supplied through a heater provided in the cylinder itself, or a separate melting apparatus can be introduced.

1, the upper and lower dies 30 and 20 are arranged on the upper and lower sides with respect to the direction of gravity, respectively. However, if necessary, The present invention should be construed as falling under the scope of protection of the present invention.

In the case of using a simple injection molding and arranging insert bodies to form a waterproof member, the equipment itself is relatively expensive, the cavity can not be realized, productivity is remarkably low due to supply of molten resin close to natural flow, (That is, the waterproof member) is low in strength and weak in strength, and the defect occurrence rate is high due to the air in the mold cavity, and it is difficult to realize a desired waterproof grade (for example, IPX 7 or more).

On the other hand, in the case of performing insert molding using a molding apparatus having a resin pressurizing supply means, it is possible to mold a formed article (i.e., a waterproof member) of high quality and high density owing to the molten resin supplied at a high pressure, There is no problem of lowering the molding quality due to the residual air and the characteristics of implementing the multi-cavity are added, thereby enabling the mass productivity and price competitiveness to be secured together with the characteristics of the resin pressurizing supply means.

The lower mold 20 has a first forming part 21 on its upper part,

1 (Fig. 1 [A] is a view before the arrangement of the insert bodies Ic,

[B] shows a state in which the formation of the cavity R1 by the upper and lower metal molds and the molding of the waterproofing member W by press injection of the molten resin are completed together with the arrangement of the insert bodies

In the case where the preformed insert body Ic is disposed, the first shaping section does not function as a 'molding' function but simply functions as an anchoring section.

The upper mold 30 is provided with a second molding part 31 at the lower part thereof and the supporting protrusion Ip of the insert body Ic of the second molding part 31 of the cavity R1 And the waterproof member W is press-injected into the seal cavity Rr formed in the mold cavity.

Therefore, in the second forming portion 31 of the upper mold 30, only the portion forming the space of the thread cavity Rr substantially functions as a 'molding'.

A portion of the upper mold 30 forming the space of the seal cavity Rr, excluding the second forming portion 31,

The first molding portion 21 of the lower mold 20 is formed so as to cover a part of the insert body Ic which is substantially formed as a base other than the support projection Ip

And functions to prevent the molten resin (various kinds of elastomer or silicone resin) constituting the waterproofing member W from leaking to a portion other than the seal cavity Rr and serves as a seat of the insert body Ic.

Thus, the terms "upper" mold or "lower" mold means two or more mold blocks that form a cavity by mutual coupling regardless of gravity direction,

Further, the term 'first and second' molded parts are inevitably selected terms to cover that a waterproof member integrally formed on an insert body can be formed on various parts of the insert body,

In this sense, various modifications employing the spirit of the present invention should be construed as falling under the scope of protection of the present invention.

As shown in Fig. 2, the insert body Ic having the integrally formed waterproof member W is used, for example, for a mobile phone P that needs the waterproof performance most, particularly a battery It is incorporated into the cover to wrap the battery built into the back of the body and to achieve a constant waterproof rating (eg IPX 7 or higher).

The technique of the present invention can be utilized for insert molding molding of a waterproof member for various other electronic products, household goods, and other articles.

A cavity R1 is formed between the first forming part 21 of the lower mold 20 and the second forming part 31 of the upper mold 30. The cavity R1 is formed by a variety of waterproofing members integrally formed on the insert body. Or the actual cavity Rr is formed at two or more positions.

In FIG. 1, only the relay 41 is omitted, but the relay 41 for transmitting the force for lifting and lowering the upper mold 30 is shown. The power source of the movable means may be variously selected from a motor, an engine, And the relay body can be connected to various power transmitting members such as cams, plungers, chains, and the like.

The resin pressurizing supply means serves to pressurize and supply the molten resin to the actual cavity between the first molding portion, the second molding portion, or both, and the insert body arranged in the cavity,

To this end, a runner through which the resin passes is introduced through the introduction of upper and lower molds or other mold blocks,

A manifold for distributing resin is introduced into each cavity of a molding apparatus having a multi-cavity. An injection nozzle connected to a screw cylinder or a press cylinder, which is the core of resin pressure supply means, is connected to the manifold.

1, the lower mold 20 is fixed, and the upper mold 30 is moved up and down by the relay body 41 connected to the movable means 40.

Further, a base 10 provided with a stopper 11, which is arranged under the lower mold 20 with an installation space R2, is further introduced,

The second elastic body S2 is arranged in the installation space R2.

The second elastic body S2 may be variously selected from coil springs, other leaf springs, cushions utilizing various elastomer materials as shown in the figure.

The second elastic body S2 is intended to prevent any deformation of the insert body Ic except for the integral formation of the waterproof member W. [

That is, in order to deform the insert body by pressing the insert body Ic according to the combination of the upper and lower molds, or to prevent the insert body from being deformed by heat due to the molten resin characteristics

The lower mold is lowered at a lowered pressure and at a lowered speed when the upper mold 30 is lowered to prevent the insert body Ic arranged in the cavity R1 from being subjected to impact and deformation.

Particularly, the prevention of the deformation of the insert body Ic is more important than the portion where the waterproofing member W is formed. This is because the finished insert body Ic, that is, the battery cover, The leakage of the water around the waterproof member W is cut off as designed.

The prevention of the deformation of the insert body Ic further includes forming a spacing R3 between the intermediary body 41 and the upper mold 30 of the movable unit 40. The first elastic body S1 ) Can be introduced.

The elastic body S1 may also be a coil spring, a leaf spring, a cushion using various elastomer materials, and the like. Particularly, the elastic body S1 is a longitudinal elastic body that exerts elasticity only in the vertical direction, To prevent damage to the insert body (Ic), and to improve the quality of the waterproof member (W).

1 (A) and (B), the displacement d2 of the lower mold 20 which is sandwiched by the second elastic body S2 is smaller than the displacement d2 of the lower mold 20, (D1) of the maximum thickness (Ic)

For preventing damage to the insert body and for precision molding of the waterproof member (that is, for preventing leakage of the molten resin).

The displacement d2 of the lower mold 20 is limited by the stopper 11 provided on the base 10 or various other stopping means. As the upper and lower molds are combined by the mold operating means

The cavity R1 is formed while pressing the insert body Ic in a buffered and decelerated form by the first and second elastic bodies S1 and S2,

The first and second elastic members S1 and S2 are contracted by the additional pressing so that the upper and lower molds 30 and 20 are tightly fitted so that the molten resin to be injected at a later time is not leaked to the outside of the seal cavity Rr

The lower mold 20 enters the installation space R2 of the base 10 while contracting the second elastic body S2 and is finally stopped by the stopper 11 or various stopping means,

The intermediate body 41 of the movable unit 40 is displaced while contracting the first elastic body S1 so that the separation distance d3 from the upper mold is eliminated,

The upper mold 30 is engaged with the lower mold 20 while eliminating the final distance d1a equal to the maximum thickness of the insert body Ic (i.e., the height of the cavity R1).

The advantage that the displacement of the lower mold 20 and the maximum thickness of the arranged insert body Ic are the same, i.e. d2 = d1,

D1 = d2 = d3 (d1 = d2 = d3) because the distance between the relay body 41 and the upper mold 30 is equal to the maximum thickness of the insert body Ic, .

In the above description, the known molding apparatuses related to the type and physical properties of the waterproof member, the material of the insert body, the resin pressurizing supply means, the manifold, and the structure of the multi-cavity are omitted. However, And can reproduce.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it should be understood that various changes, omissions and substitutions can be made without departing from the spirit and scope of the present invention as defined by the appended claims. And should be construed as falling within the scope of protection of the present invention.

M: Molding apparatus 10: Base
11: Stoop 20: Lower mold
30: upper mold 40: movable means
R1: cavity R2: installation space
R2: spacing space S1, S2: elastic body
P: Cell phone Ic: Insert body (battery cover)
Ip: Support projection W: Waterproof member

Claims

A lower mold having a first forming part on the upper part;
An upper mold coupled to the lower mold and forming a cavity with the first forming unit through a second forming unit provided at a lower portion;
An upper mold or a lower mold for discharging the molded body, or both of them; And
Resin pressurizing supply means for pressurizing and supplying the molten resin to the actual cavity between the first molding portion and the second molding portion, or both, and the insert body arranged in the cavity;
Wherein the insert molding apparatus comprises:

The method according to claim 1,
Wherein the movable unit includes a relay body that presses the upper mold and has a spacing space between the upper mold and the upper mold,
And a first elastic body is further provided between the intermediate member and the upper mold.

3. The method according to claim 1 or 2,
A base disposed at a lower portion of the lower mold with an installation space therebetween, the base having a stopper,
And a second elastic body arranged in the installation space. &Lt; RTI ID = 0.0 > [10] < / RTI >

The method of claim 3,
And the displacement of the lower mold that is sandwiched by the second elastic body is equal to the maximum thickness of the insert body arranged in the cavity.