KR200371946Y1 - Heating system of injecting mold for forming parts of cell phone - Google Patents

Abstract

The present invention is an injection mold for injection molding various synthetic resin products, in particular, parts such as a key button or a window of a mobile phone, and in particular, an upper mold plate (or runner stripper plate) of an injection mold that enables injection molding in a heated state and By inserting a plurality of heat-type heater rods from one side of the lower plate, and mounting non-metal insulation plates on one side of the fixed side mounting plate and the movable side mounting plate of the upper and lower ends, respectively.

The heat transfer rod eliminates the hazards in the work space and the working radius, but significantly shortens the time to reach the set temperature, improving work efficiency and responds more quickly even when the set temperature is changed. Will be reduced,

Heating of the injection mold for molding mobile phone parts, which prevents burns and fires of workers, by preventing the heat of high temperature generated from the mold from being conducted by the insulation plates formed on the mounting plates mounted on the fixed and movable sides of the injection molding machine. It's about structure.

Description

Heating structure of injection mold for cell phone parts {Heating system of injecting mold for forming parts of cell phone}

The present invention improves the heating structure of a mold for molding an injection molded product used for a key button or a window of a mobile phone, in particular in the injection mold for injection molding various synthetic resin products and the like, and significantly reduces the defective rate of the injected product. It is about the heating structure of injection mold for molding mobile parts, which makes it possible to maintain very economical and stable quality.

In general, injection molds have various shapes and structures, such as two-stage molds and three-stage molds. In the case of products that require small size and transparency and precision, such as key buttons and windows of mobile phones, and mass production, a plurality of cavities Three-stage pinpoint molds having a largely used.

Looking at the molding form produced by the injection molding of the key button or the window of the mobile phone, a runner sprue (a) is formed close to the injector from the injection machine as shown in FIG. 1, and branches from the runner sprue (a). The main runner (b) and the auxiliary runner (c) branching from the main runner (b) and the pin point (d) branched from the auxiliary runner (c) and the runner formed at the lower end of the pin point (d) Looking at the schematic structure and injection principle of the injection mold for molding the injection molded product, which is composed of a plurality of cavities by the gate (e),

The injection mold is typically formed with a sprue and a runner on the upper plate, and a runner, a gate, and a cavity of a corresponding shape are formed on the lower plate, respectively.

The sprues, runners and gates in the injection molds play a very important role as components of the flow injection system in injection molding, and in particular, the shape and dimensions of the runners and gates are the appearance, physical properties, dimensional accuracy, and molding cycle of the molded products. It directly affects your back.

The molten injection raw material is injected from the nozzle of the injection molding machine, passes through the sprue of the mold, passes through the runner branched from the sprue, passes through the gate, and is filled into the product shape cavity.

In the state of the filling process, the injection solution is filled into the mold cavity while the pressure decreases due to friction while passing through the sprue, runner and gate, and at the same time, the molten resin passes through the runner and the limited narrow gate to reduce friction. Heat is generated and the resin temperature is temporarily raised and injected into the cavity,

Since the runner and the gate play an important role in greatly affecting the moldability, the internal deformation, and the quality of the molded article, the runner and the gate are adjusted in consideration of the shape, the size of the molded article, the characteristics of the resin, and the like.

Therefore, the oil passage forms an oil passage in the upper plate, the lower plate, or the runner stripper plate, and the hot oil circulates inside the mold by a separate oil pump, so that the core periphery of the cavity is located at a high temperature. By heating, excellent circulation of the resin by the mold heated to a high temperature,

The resin moldability is improved to produce a smoother and higher quality product, as well as to significantly reduce the occurrence of unmolded, weld lines, flow marks, etc., thereby lowering the defective rate of the product, thereby improving productivity.

It can cope with shrinkage and whitening stably, so that more stable injection molding products can be obtained.

However, since the heating structure of the mold by the high temperature oil as described above is supplied with the high temperature oil from the oil pump installed on one side or the periphery of the injection machine to which the mold is mounted, the oil circulation tube is inside the workplace or the operator's working group. Since it is located on the grounds, it is not only troubled by the oil circulation pipe, but also when a heavy oil mold or a work tool is dropped into the oil circulation tube and the high temperature oil circulation tube is damaged, oil of high temperature and high pressure of 150 ° C or higher This eruption creates a very dangerous situation.

In particular, as described above, the method of warming the mold by oil requires much time, such as 2 to 3 hours, to raise the oil to an appropriate temperature of 150 to 160 ° C. Work efficiency is greatly reduced,

It is not easy to control the temperature, even if the constant temperature rises or falls, there is an unreasonable problem to wait in a work delay state.

In addition, since the mold heated by the oil as described above is very hot, the heat is conducted to the main body of the injection molding machine made of metal, and if the user touches the main injection molding machine during operation, the mold is burned. And since the injection machine is kept in a very high temperature, it shortens the life of the machine and the life of the electric and electronic control device, and may cause a malfunction, requiring extra careful attention.

The present invention was devised to eliminate the problems described above, and inserts a plurality of heat-type heater rods from one side of the upper mold plate (or runner stripper plate) and the lower plate of the injection mold that enable injection molding in a heated state. By mounting non-metal insulation plates on one side of the fixed side mounting plate and the movable side mounting plate of the upper and lower ends, respectively,

The heat transfer rod eliminates the hazards in the work space and the working radius, but significantly shortens the time to reach the set temperature, improving work efficiency and responds more quickly even when the set temperature is changed. This is to be reduced, the temperature can be adjusted up to 150 ℃ ~ 200 ℃ or more to obtain the desired working conditions,

Heating of the injection mold for molding mobile phone parts, which prevents burns and fires of workers, by preventing the heat of high temperature generated from the mold from being conducted by the insulation plates formed on the mounting plates mounted on the fixed and movable sides of the injection molding machine. It is an object of the present invention to provide a structure.

1 is a perspective view of an injection molding of a mobile phone key button

2 is an overall view of an injection mold according to the present invention

Figure 3 is a main cross-sectional view of the injection mold according to the present invention

4 is a state in which the injection mold according to the present invention mounted on the injection machine

Explanation of symbols on the main parts of the drawings

1: fixed side mounting plate 2: movable side mounting plate

3: Senate 4: House of Representatives

5: insertion hole 6,6 ': heater rod

7: power supply line 8,8 ': insulation board

9: Injection Molding Machine 10: Injection Mold

Hereinafter, preferred embodiments of the present invention will be described.

Figure 2 is an overall view of an injection mold according to the present invention, Figure 3 is a main cross-sectional view of the injection mold according to the present invention.

The upper plate 3 and the lower plate 4 are coupled between the fixed side mounting plate 1 and the movable side mounting plate 2, and the upper plate 3 and the lower plate 4 have separate heating means. In the known injection mold heating structure that is formed by the injection means to be injection molded in the heated state of the injection mold 10 by the heating means,

A plurality of transverse insertion holes 5 are formed in one side of the upper plate 3 and the lower plate 4, and the heat-transfer heater rods 6 and 6 ′ are respectively inserted in the insertion holes 5. To fix it,

Power supplied from the outside is supplied to the heater rods 6 and 6 'through the power supply line 7 drawn out to one end of the heater rods 6 and 6',

Non-metal insulation plates 8 and 8 'are fixedly mounted on the outer front surfaces of the fixed side mounting plate 1 and the movable side mounting plate 2, respectively, to generate heat from the heater rods 6 and 6'. By the high heat is configured to not be conducted to the injection machine (9) coupled to the fixed side mounting plate (1) and the movable side mounting plate (3).

Referring to the action of the heating structure of the injection mold for molding a mobile phone component of the present invention as described above in more detail as follows.

As shown in FIG. 4, the injection mold 10 according to the present invention is mounted on the injection machine 9 to receive a molten resin of high temperature and high pressure from the injection machine, whereby the product is molded by a core shape therein.

In the case of products that require small size and require mass production, such as key buttons and windows for mobile phones, when the number of cavities is increased, sufficient injection pressure should be applied to ensure stable quality. As described above, in order to obtain stable quality, a large injection molding machine having a high injection pressure is used.

Since it is very difficult to stabilize the quality while using a large-scale injection machine, a separate heating device is formed on the upper plate 3 or the lower plate 4 having a core in the injection mold of the key button for a mobile phone as described above. By the heating device, the upper plate 3 and the lower plate 4 can be kept at a constant temperature at all times, thereby improving the flow of the resin to prevent unmolding, shrinkage, weld lines, and flow marks. Will be prevented.

At this time, as the above-mentioned heating means, a plurality of transverse insertion holes 5 are formed on one side of the upper plate 3 or the runner stripper plate and the lower plate 4 as shown in the drawing, and the insertion holes 5 are provided. By inserting heater rods 6 and 6 'each having a power supply line 7 therein, when the power is applied by the power supply line 7 from the outside, the heater rods 6 and 6' are heated to a high temperature. The upper plate (3) and the lower plate (4) will be quickly raised to a set temperature.

At this time, the heater rod (6) (6 ') is very easy to handle compared to the conventional oil heater, but since the oil supply pipe is not located in the workplace or the working radius, such as burns and products of the human body caused by damage to the oil supply pipe or To prevent serious disasters that may occur on the machine,

It is easier to control the temperature than the oil, so it is possible to increase the temperature for a faster time or to easily control the temperature, thereby minimizing the loss due to work delay or waiting time.

In addition, since the high temperature heat is generated from the heater rods 6 and 6 'in the injection mold 10, the heat is conducted to the injection machine 9 made of metal, and thus the injection mold 10 is mounted on the injection machine 10 so that the injection machine ( 9) It generates heat of high temperature in itself,

Due to such high temperature heat, the injection worker is in danger of being burned or a fire, and it should be very careful, but the non-metallic is fixed to the fixed side mounting plate 1 and the movable side mounting plate 2 of the injection mold 10 described above. Re-insulating plates (8) (8 '), for example, by mounting a non-conductor such as a backlight or asbestos panel to prevent the high temperature heat generated from the injection mold (10) to be conducted to the injection machine (9) body It can prevent burns and fire.

In particular, considering that the interior of the injection workshop is a place where a lot of flammable materials, such as a paper box or resin molding, the insulation structure as described above is a simple structure to protect the safety and life and property of the workplace from fire, but also has excellent features.

The heating structure of the injection mold for molding mobile parts of the present invention as described above, while eliminating the risk factors in the work space and the working radius by the heat-heating heater rod, the time to reach the set temperature is significantly shortened, and the mold temperature is raised by the warmer. As the temperature can be raised, the working conditions can be adjusted at will, which improves the quality of the product as well as the efficiency of the work.It also responds more quickly when the set temperature is changed. Will be

Since the high temperature heat generated from the mold is not conducted to the mechanical device by the heat insulation plate formed on the mounting plate mounted on the fixed side and the movable side of the injection machine, the service life of the whole machine and the electrical and electronic control unit are extended. It is possible to prevent fires, fires, etc. It is effective to work very safe.

Claims (1)

The upper plate 3 and the lower plate 4 are coupled between the fixed side mounting plate 1 and the movable side mounting plate 2, and the upper plate 3 and the lower plate 4 have separate heating means. In the known injection mold heating structure, which is formed by the injection means to be injection molded in the heated state of the injection mold 10 by the heating means, A plurality of transverse insertion holes 5 are formed in one side of the upper plate 3 and the lower plate 4, and the heat-transfer heater rods 6 and 6 ′ are respectively inserted in the insertion holes 5. To fix it, Power supplied from the outside is supplied to the heater rods 6 and 6 'through the power supply line 7 drawn out to one end of the heater rods 6 and 6', Non-metal insulation plates 8 and 8 'are fixedly mounted on the outer front surfaces of the fixed side mounting plate 1 and the movable side mounting plate 2, respectively, to generate heat from the heater rods 6 and 6'. Heating structure of the injection mold for molding a mobile phone parts, characterized in that the high heat by being prevented from being conducted to the injection machine (9) coupled to the fixed side mounting plate (1) and the movable side mounting plate (3).