KR20090038414A - Resin-intake prevention structure for mobile phone insert injection molding - Google Patents

Abstract

A resin-intake prevention structure for mobile phone insert injection molding is provided to prevent a molten mold resin from flowing into an absorption hole because the insert is properly inserted into the main mold, and prevent an insert from being separated from the main mold. A resin-intake mold for a mo comprises an upper plate(20), a pressing member(60) penetrated to the longitudinal direction of the upper plate; and an elastic member(50) whose some part is inserted into the outer circumference of a body(61) of the pressing member. Some part of the lower end(62) of the pressing member is protruded. The lower end of the pressing member is larger over the body. The underside of the lower end of the pressing member is formed level.

Description

Resin-intake prevention structure for mobile phone insert injection molding}

The present invention relates to an insert injection molding mold applied to a mobile phone, and more particularly, to securely insert the insert into a predetermined position in the main mold to reduce the defect rate due to the insert detachment, and to cause the insert to be misinserted and not inserted. By minimizing the damage of the molded resin in the molten state to the inside of the suction hole formed in the vent hole, and minimizing the damage, the preparation work is minimized during mass production only by improving the structure of the mold itself. The present invention relates to an insert injection molding mold for a mobile phone configured to improve efficiency and maximize efficiency.

In general, injection molding refers to injection molding of a resin in a molten state by heating the resin, and then cooling the resin by injecting the resin at a high speed and high pressure into a mold having a cavity of a desired shape, that is, a space formed in a molding die. It is a way to get a molded product by opening the mold. In this injection molding, in order to produce a product in an optimal state, molding materials (resin), a mold, an injection molding machine, and peripheral devices must be properly prepared complementarily.

In general, an insert means a metal or other material included in a molded article, that is, a part made to be interchangeably fitted with only a short life part as part of a mold. In particular, insert molding in the injection molding process of various plastic products including a mobile phone case means that when the product is molded, plastic nuts, reinforcement plates (insert materials), etc., may be embedded in the product. The insert material is first put into the injection mold before the product is injection molded.

An injection molding machine is one of plastic molding apparatuses, and is a mechanical apparatus manufactured to mold an injection product by heat-melting a resin, injection-injecting and cooling and solidifying the mold. Looking briefly at the configuration of a conventional injection molding mold, a cavity for forming a product is formed by injecting molten resin into a part where the upper part of the mold installed on the fixed side plate and the lower part of the mold installed on the moving side plate are separated and contacted with each other. A gate through which molten resin is injected into the cavity from the resin supply device is formed, and a cooling water passage for cooling and solidifying the molten resin injected into the cavity is formed at the lower side of the mold.

In the conventional injection molding mold configured as described above, the movable side plate is transferred to the fixed side plate along the tie bar to close the mold lower part in intimate contact with the upper part of the mold, thereby forming a cavity for forming a molded product. At this time, as the screw of the resin supply device rotates, the solid resin supplied from the resin supply hopper is melted by the heating heater, and the melted resin is transferred from the injection nozzle to the injection molding mold by the resin supply device being transferred to the injection mold by the cylinder. Is injected into the gate. In addition, the molten resin injected into the gate is introduced into the cavity of the mold forming apparatus by the pressure applied by the rotation of the screw. When the molten resin in the cavity is completely filled, the cooling water is supplied to the cooling water passage at the lower side of the mold to solidify the molten resin. Next, the molten resin in the cavity is completely solidified and the lower side of the mold is separated from the upper side of the mold while the moving side plate is retracted so that the product is molded and taken out.

 On the other hand, in performing the injection molding as described above, in order to reduce the defective rate of the product during the injection molding and to safely protect from mold breakage and failure, a predetermined insert member must be inserted and fixed correctly at the desired mold position. .

Therefore, various methods for completely fixing the insert member in the exact position inside the mold inside have been proposed. For example, from the structure of attaching the insert member to the pin by forming a guide pin into a protrusion, All of the above methods include inserting the suction pad at the lower side to suck and insert the insert member by vacuum suction method, and attaching the insert member using the air in the pad after inserting the suction pad at the lower side of the mold. It is aimed at realizing a stable and solid positioning device of the member.

In the above-described injection molding machine, since the main mold including the insert member moves horizontally or vertically, when the insert member inserted in a predetermined path and the separate fixing means do not become parallel, the insert member is slightly deviated from the main mold. Accidents occur frequently during the injection process, such as departure. This has the fatal drawback of requiring a repair of the mold, leading to another mold accident with an increase in the defective rate upon product completion.

Among the conventional methods described above in the art, a structure in which a separate guide pin is formed to protrude to attach the insert member to the main mold has a worn portion due to frequent insertion of the insert member, and a drop occurs when the mold mold closing speed is increased. And a phenomenon in which the speed decreases, while in the structure of inserting the suction pad on the lower side of the mold and fixing the insert member to the mold by vacuum suction, the mold trouble is reduced, but the mold closing speed of the mold is overcome. If the insert member is not guided to the main mold by an operator or other carelessness, there is a closed end in which molten resin flows into the inlet port, thereby causing a risk of mold damage. In addition, in the method of inserting the adsorption pad under the mold to fix the insert member using air in the pad, the adsorption function is significantly lower than that of other methods, and thus, many problems are encountered in performing injection molding.

Accordingly, the present invention has been devised to actively solve the above problems, it is more efficient to build a more stable fixing means to avoid mold damage and more efficient, can significantly improve the defective rate of the finished molded product The purpose is to provide insert injection molding molds for mobile phones.

The problem solving means of the present invention for achieving the above object is to form a main mold consisting of the upper template and the lower template to add an elastic body and a pressing member to the upper template, while the lower template is the same or similar to the conventional vacuum The solution to the problem is to implement an insert injection molding mold for a mobile phone that maintains a closer contact between the mold and the insert by installing a suction device so that the inserted insert can be pressurized up and down.

According to the present invention having the above configuration, the insert inserted at a predetermined position is fixed to maintain a more contact state with the main mold to reduce the defect rate due to the insert detachment, the molten state when the insert is misinserted and not inserted By minimizing the damage of the molding resin to the inside of the suction port and minimizing the damage, the preparation work is minimized during mass production by merely improving the structure of the mold itself. The effect that can maximize efficiency is expected.

1 is a schematic configuration diagram of an insert injection molding mold for a mobile phone configured according to a preferred embodiment of the present invention, and FIG. 2 is a state diagram of an insert injection molding mold for a mobile phone configured according to a preferred embodiment of the present invention. to be.

As shown in the drawings, the present invention is an insert injection mold for a mobile phone, which is composed of an adsorption nozzle case for adsorbing a part to be inserted into a mold and a pressing member and an elastic body that pushes the adsorbed part once more from the rear to closely contact the tip of the main mold. Note that this is related to.

Hereinafter, with reference to the accompanying drawings will be described a specific and detailed configuration of the insert injection molding mold for mobile phones to be proposed in the present invention.

The present invention more closely fixes the insert 40 introduced into the main mold 10 in the injection molding process, and also inside the mold even when the insert 40 is not inserted into the mold 10. The molten resin is not sucked in.

In constructing the insert injection molding mold for the mobile phone;

The injection molding mold,

The main mold 10, which consists of the upper template 20 and the lower template 30, is reciprocally driven within a predetermined range and coupled or spaced apart from each other,

The upper die 20 in the main mold 10 is formed in the horizontal direction through the lower end portion 62 protrudes and the lower end portion 62 is formed in an expanded size compared to the body 61 and the lower end portion formed The bottom surface of the 62 is a pressing member 60 formed to have a perfectly flat shape; and an elastic body 50 partially inserted into the outer periphery of the body 61 of the pressing member 60; Meanwhile,

In the lower die 30 in the main mold 10, the vent 210 for inducing the flow of air, and formed in the form of a circular tube through which the inside is penetrated by using a soft material, the upper side from the middle height of the body A bottleneck is formed to narrow the outer edge portion to reach the suction port 100, and the suction hole 100 is formed of the suction part 120 widening upward, and the air is sucked in and discharged from one end of the vent hole 210. By arranging a predetermined vacuum device (not shown), the vacuum suction device for fixing the insert to the main mold in such a way that the plate-shaped insert 40 is sucked by the vacuum device;

It is characterized in that the insert 40 is inserted into the insert 40 under pressure to form a insert injection molding mold for a mobile phone to maintain a more intimate contact between the mold and the insert.

In general, the insert injection mold is to inject a molded article of various shapes through the interaction of the upper and lower templates 20 and 30, the upper template 20 and the lower template 30 in the present invention are relative to each other concept It is just to refer to the description for easy understanding, not to give a specific meaning.

Adsorption port 100 of the vacuum suction device is the same content as the 'application adsorption port for mobile phone parts' No. 20-2008-0003261 previously filed by the same applicant, the adsorption port 100 is usually implemented It is formed in the shape of a circular tube using a flexible silicone so that the upper portion is partially protruded into the end of the vent hole 210 of the adsorber, the bottleneck of the form narrowing in the upper cabinet direction of 45 ° from the middle height of the body The upper part is formed, and the adsorption part 120 of the form expanded further so that it may become the inclined surface which formed the inclination of 45 degrees from the upper side of the bottleneck part, It is characterized by including the structure. The detailed description related to the above is duplicated with the technical spirit already filed, so the detailed description in the present invention will be omitted.

When the present invention made of the above-described configuration is implemented according to the most preferred embodiment, and also described in detail for the action and effect caused by the following. Prior to this, terms or words used in this specification and the following claims are not correct to be interpreted in their ordinary or dictionary meanings, and the inventors will appropriately describe the concepts of the terms in order to best explain their own design. It should be interpreted as meanings and concepts corresponding to the technical idea of the present invention on the basis of the principle that it can be defined.

First, when the main mold 10 of the present invention, which consists of the upper template 20 and the lower template 30, is opened, the upper and lower molds are in close contact with each other through a predetermined insert 40, and then the molding operation is performed. Then, the molten molding resin flows into the molding portion to solidify, and after the mold is opened, the molded product containing the insert 40 is completed. In addition, when the suction of the air is started by the vacuum device of the adsorber, the insert is sucked by the suction part 120 of the suction port 100 by suction of the air to tightly seal the inside of the suction port and the ventilation hole, and the vacuum By means of air suction of the device, the adsorbed insert 40 compresses the adsorption section 120 of the adsorption port.

When the adsorption unit 120 is compressed by the continuous suction of air, the adsorption unit is expanded and folded by the bottleneck, and at the same time, the inside of the adsorption port and the vent is deformed into a vacuum state. That is, as the inside of the suction hole and the vent is deformed into a vacuum state, the pressure inside the suction hole and the vent hole is significantly lower than the atmospheric pressure, so that a pressure difference occurs based on the side of the insert adsorbed to the suction part of the suction hole. As it is fixed by the insert 40, the area of the insert is vacuum-adsorbed due to the effect of the adsorption unit 120 is increased by the compression of the insert 40, the adsorption force is increased, thereby inserting even in the inertia and impact caused by the movement of the adsorber It will not fall or change position.

On the other hand, in the present invention is characterized in that the elastic member 50 and the pressing member 60 is additionally installed on the upper template 20, while the lower template 30 is provided with a vacuum suction device previously applied as described above By inserting the inserted insert 40 so as to apply a pressure up and down was configured to maintain a more intimate contact between the mold and the insert. In addition, even when the insert 40 is not inserted into the mold, the molten resin is not sucked into the injection molding mold.

When the insert 40 is interposed between the upper template 20 and the lower template 30, the upper insert 40 is sucked and fixed by a vacuum suction device disposed in the lower template below the insert, and then interposed. When the pressing member 60 is lowered on one surface of the insert, the lower end 62 of the pressing member and one surface of the insert 40 are disposed in close contact with each other. At this time, the lowering the pressing member 60 is blocked by the insert 40 and can not be lowered any more, and naturally press the insert 40, while pressing the insert and at the same time a repulsive force acting on the elastic member formed on the pressing member ( As the 50 is narrowly contracted, the pressing member 60 and the elastic body 50 are adjusted upward by a predetermined interval to retreat.

The pressing member 60 is retracted by an appropriate distance accompanied by the contracting action of the elastic body 50 by the insert 40 repulsive force, which acts to relieve the pressing of the insert 40 while simultaneously pressing the insert 40. Leads to. The elastic body 50 is a component disposed to perform a continuous contraction and relaxation movement as shown in the figure, usually refers to an elastic member such as a spring. Related contents are shown in detail with reference to FIG. 2.

On the contrary, when the insert 40 is not inserted between the upper and lower templates 20 and 30 due to user's carelessness or other malfunction, the pressure member 60 protrudes downward from the upper template 20. The tip of the adsorption part 120 of the adsorption port 100 is sealed. That is, when the molten resin flows when the insert is not inserted while the mold is closed, the molten resin flows into the suction port 100 by suction force applied to form a vacuum state, which results in breakage of the mold. This incurs additional costs for working hours and repairs.

Thus, in the present invention to implement an insert injection molding mold consisting of a separate pressing member 60 and the elastic body 50, when the pressing member 60 is vertically downward when the insert 40 is not inserted As there is no blockage by the insert 40, the mold moves downward more than when the insert is embedded in the mold, thereby completely sealing the adsorption part 120 of the suction port formed at the lower side. As a result, even if the resin is introduced, it does not cause any trouble to the vacuum suction device, thereby improving overall work efficiency and maximizing efficiency.

1 is a schematic configuration diagram of an insert injection molding mold for a mobile phone constructed according to an embodiment of the present invention.

Figure 2 is a working state of the insert injection molding mold for a mobile phone configured according to an embodiment of the present invention.

[Explanation of symbols on the main parts of the drawings]

10: main mold 20: upper template

30: lower template 40: insert

50: elastic body 60: pressing member

61: body 62: lower portion

100: adsorption port 120: adsorption part

210: ventilator

Claims (1)

The main mold 10, which is composed of an upper template 20 and a lower template 30, is reciprocally driven within a predetermined range, and is coupled to or spaced apart from each other, and the lower template 30 is sucked through an inner side using a soft material. A vacuum device for suctioning and discharging air at one end of the suction hole 100 and the vent hole 210 formed of the part 120 is disposed, and the insert 40 of the plate shape is sucked by the vacuum device. In the insert injection molding mold for a mobile phone configured to fix the insert 40 to the adsorption unit 120, In the upper template 20 in the main mold, It is formed through the horizontal direction, the lower end portion is partially protruded, the lower end 62 is formed in an expanded size compared to the body 61, the bottom surface of the extended formed lower end 62 is configured to be a perfectly flat shape ( 60); And, the injection molding mold for a mobile phone, characterized in that it is installed additionally; an elastic body (50) which is partly inserted into the outer circumference of the body (61) of the pressing member (60).

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