TWI696541B - Temperature control device for plastic injection mold - Google Patents

Abstract

A temperature control device for a plastic injection mold includes: a plastic injection mold including an upper mold and a lower mold, and the upper mold and the lower mold are combined with each other to form a mold cavity, and a plurality of plastic injection molds are opened inside The cooling flow channel and at least one receiving hole, and the plastic injection mold is installed in a plastic injection molding equipment, and the plastic injection molding equipment is provided with a control unit, at least one heating rod and at least one temperature sensor are installed in The accommodating hole of the plastic injection mold, and the heating rod and the temperature sensor are connected to the control unit, and the operating temperature of the plastic injection mold is detected by the temperature sensor, and then the control unit determines the inflow of cooling medium The timing and flow rate of the cooling flow channel have the precise temperature adjustment function of plastic injection molding processing.

Description

Temperature control device for plastic injection mold

The invention relates to a plastic injection molding equipment, in particular to a temperature adjustment device for a plastic injection mold capable of stably controlling the operating temperature of plastic injection molding.

According to the conventional plastic injection molding machine, the plastic injection molding machine is equipped with an upper mold and a lower mold, and the upper mold and the lower mold are combined with each other to form a mold cavity, and the mold cavity has an injection hole communicating with the outside The plastic injection molding machine can control the closing of the upper mold and the lower mold, and inject plastic through the injection hole, and wait for the plastic to cool to obtain processed products. It is not difficult to find out that the existing conventional structure is somewhat inadequate. The main reason is as follows: the plastic injection molding machine is not provided with any cooling means in the upper mold and the lower mold, the operation temperature control is only to control the heating temperature of the plastic, however, the upper and lower molds The operating temperature will also be affected by continuous high-temperature processing, and the processing speed will differ from the external ambient temperature. When the operating temperature is too high, the molding time of the plastic will be prolonged, which will reduce its output, and it will also because of Overheating causes deformation and damage of the upper and lower molds. If the operating temperature is too low, it will affect the fluidity of the plastic and prevent the plastic from flowing into a small space or curing early. Therefore, the yield of processed items is reduced, so it is known The plastic injection molding machine cannot accurately and stably control the operating temperature, which is the technical problem to be improved for this creation.

In view of this, the inventor has many years of experience in manufacturing development and design of related products. In view of the above objectives, after detailed design and careful evaluation, the invention finally has a practical application.

The technical problem to be solved by the present invention is to provide a temperature adjustment device for a plastic injection mold in view of the above-mentioned defects in the prior art.

A plastic injection mold includes an upper mold and a lower mold, and the upper mold and the lower mold are combined with each other to form a mold cavity, and the mold cavity communicates with an injection hole, and the plastic injection mold is provided with a plurality of cooling The flow channel and the plurality of accommodating holes, and the plastic injection mold is installed in a plastic injection molding equipment, and the plastic injection molding equipment is provided with a control unit, and the control unit controls the opening and closing of the upper mold and the lower mold 1. The injection hole is filled with plastic and the cooling medium flows in the cooling channel. At least one heating rod is installed in the receiving hole of the plastic injection mold, and the heating rod is connected to the control unit. The injection mold is preliminarily heated before being injected into the plastic, so that the plastic injection mold is quickly restored and can be processed again, thereby reducing the waiting time for reprocessing. At least one temperature sensor is installed in the receiving hole of the plastic injection mold, and the The temperature sensor is connected to the control unit, uses the temperature sensor to detect the operating temperature of the plastic injection mold, and cooperates with the set temperature of the control unit and the heating control of the heating rod, and then the control unit determines the cooling medium The timing and flow into the cooling channel.

Wherein, the cooling flow channel defines an inner flow channel and an outer flow channel in the upper mold and the lower mold, and the inner flow channel is closer to the mold cavity relative to the outer flow channel, and the control unit is at the entrance of the cooling flow channel A flow control valve is connected to the end, and the flow control valve is driven by the control unit to switch the flow mode of the cooling flow channel.

Wherein, when the temperature sensor judges that the mold cavity temperature is lower than the set temperature, the control unit uses the flow direction control valve to switch between a fast cooling mode, a low speed cooling mode, and a slow cooling mode to control the temperature in the fast cooling mode The inner flow channel and the outer flow channel simultaneously circulate cold However, in the low-speed cooling mode, only the inner flow channel is controlled to circulate the cooling medium, and in the slow cooling mode, only the outer flow channel is controlled to circulate the cooling medium.

Wherein, the control unit is connected with a flow rate sensor, and the flow rate sensor is installed at the inlet end of the cooling flow channel, that is, the temperature of the plastic injection mold can be finely adjusted by using different cooling medium flow rates.

Wherein, the control unit is connected to a liquid storage tank, and the control unit detects the temperature and the amount of cooling medium in the liquid storage tank, and the control unit is connected to a compressor, and the liquid storage tank is connected to the liquid storage tank by the compressor Flow direction control valve, and the liquid storage tank is also connected to the outlet end of the cooling flow channel, and the compressor is driven and controlled by the control unit, thereby forming the flow rate control of the cooling flow channel and the circulation of the cooling medium .

Wherein, the control unit is connected with a radiator, and the radiator is connected between the outlet end of the cooling flow channel and the liquid storage tank, and the control unit can control the heat dissipation of the radiator, thereby controlling the temperature of the cooling medium The temperature difference from the operating temperature is kept within a range that will not damage the plastic injection mold.

Wherein, the control unit is connected to a control interface, and the control interface includes a display panel, the set temperature is input through the control interface and the display panel is used to view the cooling state.

The cooling medium in the cooling channel is water or refrigerant.

The first main object of the present invention is that the plastic injection mold is provided with a plurality of cooling channels and at least one accommodating hole, and the accommodating hole is provided with the heating rod and the temperature sensor, and the heating rod The temperature sensor is connected to the control unit, and the heating rod is used to initially heat the plastic injection mold before injecting the plastic, so that the plastic injection mold quickly returns to a reprocessable state, thereby reducing the waiting time for reprocessing, and Use the temperature sensor to detect the The operating temperature of the plastic injection mold, in conjunction with the set temperature of the control unit, and then the control unit determines the timing and flow rate of the cooling medium flowing into the cooling channel, thereby having the precise temperature adjustment function of the plastic injection molding process, through the operating temperature The control can effectively increase its output, and can also prevent the plastic injection mold from being deformed and damaged due to overheating, so as to improve the productivity and durability.

The second main object of the present invention is that the cooling flow channel is provided with the inner flow channel and the outer flow channel in both the upper mold and the lower mold, and the inner flow channel is closer to the mold cavity relative to the outer flow channel, and the The control unit is connected with the flow direction control valve at the inlet end of the cooling flow channel, and the flow direction control valve is driven by the control unit to switch the circulation mode of the cooling flow channel, and the control unit uses the temperature sensor to determine the mold cavity temperature When the temperature is lower than the set temperature, the cooling speed can be improved by switching the cooling mode to prevent the sudden rise in temperature to reduce the processing quality, thereby effectively controlling the operating temperature to maintain the set temperature to improve its processing. Yield and capacity.

The third main object of the present invention is that the control unit is connected with the flow velocity sensor, and the flow velocity sensor is installed at the inlet end of the cooling flow channel, that is, the plastic injection mold can be used to make the plastic injection mold different Fine temperature adjustment, the radiator is connected to the control unit, and the radiator communicates with the outlet end of the cooling channel, and the control unit can control the heat dissipation of the radiator, thereby controlling the temperature of the cooling medium and the operating temperature The temperature difference is kept within a range that will not damage the plastic injection mold, and can also effectively reduce the operating time of the compressor and the radiator, so as to reduce the energy consumption before maintaining the processing quality.

Other objects, advantages and novel features of the present invention will become more apparent from the following detailed description and related drawings.

〔This creation〕

10‧‧‧Plastic injection mould

11‧‧‧Upper Mould

12‧‧‧ Lower mold

13‧‧‧ mold cavity

131‧‧‧Injection hole

14‧‧‧cooling runner

141‧‧‧Inner channel

142‧‧‧Outer runner

15‧‧‧Accommodation hole

20‧‧‧Plastic injection molding equipment

21‧‧‧Control unit

22‧‧‧Control interface

221‧‧‧Display panel

23‧‧‧Flow control valve

24‧‧‧Flow sensor

25‧‧‧ liquid storage tank

26‧‧‧Compressor

27‧‧‧ radiator

30‧‧‧ heating rod

40‧‧‧Temperature sensor

Figure 1 is a schematic diagram of the plastic injection molding equipment of the present invention.

Figure 2 is a perspective view of the plastic injection mold of the present invention.

Figure 3 is an exploded perspective view of the plastic injection mold of the present invention.

Fig. 4 is a schematic view of the use state of the present invention.

FIG. 5 is an exploded perspective view of a plastic injection mold according to another embodiment of the invention.

FIG. 6 is a flowchart of a cooling system according to another embodiment of the invention.

FIG. 7 is a schematic diagram of another embodiment of the present invention in the rapid cooling mode.

FIG. 8 is a schematic diagram of another embodiment of the present invention in a low-speed cooling mode.

FIG. 9 is a schematic diagram of another embodiment of the present invention in a slow cooling mode.

In order to enable your reviewing committee to have a better understanding and understanding of the purpose, features and effects of the present invention, the following is please cooperate with the [schematic description] detailed description as follows: please continue from Figure 1 to Figure 4 In view of this, a temperature control device for a plastic injection mold includes: a plastic injection mold 10, a plastic injection molding device 20, at least one heating rod 30, and at least one temperature sensor 40. A plastic injection mold 10 includes a The upper mold 11 and the lower mold 12, the upper mold 11 and the lower mold 12 are combined to form a mold cavity 13, and the mold cavity 13 communicates with an injection hole 131, and the plastic injection mold 10 is provided with a plurality of The cooling channel 14 and at least one accommodating hole 15, and the plastic injection mold 10 is installed in a plastic injection molding device 20, and the plastic injection molding device 20 is provided with a control unit 21, the control unit 21 is connected to a control interface 22 , And the control interface 22 includes a display panel 221, through the control interface 22 input set temperature and the display panel 221 to watch the cooling state, and by the control The control unit 21 controls the opening and closing of the upper mold 11 and the lower mold 12, the injection hole 131 injects plastic and the cooling medium 14 flows in the cooling channel 14, wherein the cooling medium in the cooling channel 14 may be water or Refrigerant, at least one temperature sensor 40 is installed in the receiving hole 15 of the plastic injection mold 10, at least one heating rod 30 is installed in the receiving hole 15 of the plastic injection mold 10, and the heating rod 30 is connected to the The control unit 21 uses the heating rod 30 to preliminarily heat the plastic injection mold 10 before injecting the plastic, so that the plastic injection mold 10 quickly returns to a reprocessable state, thereby reducing the waiting time for reprocessing, the temperature sensor 40 Connected to the control unit 21, when the plastic injection molding equipment 20 performs a processing operation, the upper mold 11 and the lower mold 12 of the plastic injection mold 10 are controlled to be closed, and a fluid plastic is injected into the injection hole 131 The mold cavity 13 is shaped through the mold cavity 13 and shaped after cooling. At this time, the temperature sensor 40 is used to detect the operating temperature of the plastic injection mold 10, and then the control unit 21 is used to control the interface 22 The set temperature set and the heating control of the heating rod 30 determine that when the operating temperature of the plastic injection mold 10 is higher than the set temperature, the cooling mechanism is activated to allow the cooling medium to flow through the cooling flow channel 14 to reduce the operating temperature The stability is equal to or close to the set temperature, by which the control unit 21 determines the timing and flow rate of the cooling medium flowing into the cooling flow channel 14, that is, it has a precise temperature adjustment function for plastic injection molding processing, which can be effectively controlled by the operating temperature Increasing its output can also prevent the plastic injection mold 10 from being deformed and damaged due to overheating, so as to have the effect of improving productivity and durability. In addition, after the current injection molding operation is completed, the plastic injection mold 10 is subject to The temperature of the cooling flow channel 14 is lowered and the temperature is lower than the normal operating temperature. The temperature sensor 40 detects and determines that it is in this state, and the control unit 21 activates the heating rod 30 to allow the heating rod 30 to directly eject the plastic The mold 10 is heated rapidly, and then the plastic is injected into the injection hole 131 after reaching the preset temperature, thereby greatly reducing the cooling time when the plastic is molded and the waiting time after the mold is returned to temperature, so as to be effective Improve its processing efficiency.

In another embodiment of this creation, please continue to see from Figure 5 to Figure 9, the cooling runner 14 has an inner runner 141 and an outer runner 142 in both the upper mold 11 and the lower mold 12 , And the inner flow channel 141 is closer to the mold cavity 13 than the outer flow channel 142, and the control unit 21 is connected to a flow control valve 23 at the inlet end of the cooling flow channel 14, and the flow control valve 23 is controlled by the control unit 21 The switching mode of the cooling flow channel 14 is driven, and the control unit 21 uses the temperature sensor 40 to determine that the temperature of the mold cavity 13 is lower than the set temperature, and the flow direction control valve 23 is used to switch between a rapid cooling mode and a low speed. Cooling mode and slow cooling mode, in the rapid cooling mode, the inner flow channel 141 and the outer flow channel 142 are controlled to circulate the cooling medium at the same time, in the low speed cooling mode, only the inner flow channel 141 is controlled to circulate the cooling medium, and in the slow cooling mode The lower control only circulates the cooling medium through the outer flow channel 142. By switching the cooling mode, the reaction speed of the cooling mechanism can be increased, and the processing quality can be prevented from being reduced due to sudden temperature rise, thereby effectively controlling the operating temperature to maintain the set temperature. In order to improve its processing yield and productivity.

For another practical effect of this creation, please continue to see from Figure 6, the control unit 21 is connected to a flow sensor 24, and the flow sensor 24 is installed at the inlet end of the cooling channel 14, That is, the temperature of the plastic injection mold 10 can be finely adjusted by using different cooling medium flow rates, and the control unit 21 is connected to a liquid storage tank 25, and the control unit 21 detects the temperature and the amount of cooling medium in the liquid storage tank 25, and The control unit is connected to a compressor 26, and the liquid storage tank 25 is connected to the flow control valve 23 by the compressor 26, and the liquid storage tank 25 is further connected to the outlet end of the cooling flow channel 14, and the compressor 26 is driven and controlled by the control unit 21, thereby forming the flow rate control of the cooling flow channel 14 and the circulation of the cooling medium, and the control unit 21 is connected to a radiator 27, and the radiator 27 communicates with the cooling The outlet end of the flow channel 14 and the liquid storage tank 25 In addition, the control unit 21 can control the degree of heat dissipation of the radiator 27, thereby controlling the temperature difference between the cooling medium temperature and the operating temperature to be within a range that does not damage the plastic injection mold 10, and can also effectively reduce the compression The operation time of the machine 26 and the heat sink 27 is improved to reduce the energy consumption before maintaining the processing quality.

In summary, the present invention has indeed reached a breakthrough structural design, and has improved the content of the invention, and at the same time can achieve industrial utility and progress, and the present invention has not been found in any publications, but also novel, when In line with the relevant laws and regulations of the Patent Law, I filed an application for an invention patent in accordance with the law, and urge the examination committee of the Jun Bureau to grant legal patent rights.

However, the above is only one of the preferred embodiments of the present invention, and it should not be used to limit the scope of implementation of the present invention; that is, all changes and modifications made in accordance with the scope of the patent application of the present invention should still belong to the present invention Within the scope of the patent.

10‧‧‧Plastic injection mould

11‧‧‧Upper Mould

12‧‧‧ Lower mold

13‧‧‧ mold cavity

131‧‧‧Injection hole

14‧‧‧cooling runner

15‧‧‧Accommodation hole

30‧‧‧ heating rod

40‧‧‧Temperature sensor

Claims (5)

A temperature control device for a plastic injection mold includes: a plastic injection mold, the plastic injection mold includes an upper mold and a lower mold, and the upper mold and the lower mold are combined with each other to form a mold cavity, and the mold cavity There is a injection hole communicating with the outside, and the plastic injection mold is provided with a plurality of cooling channels and a plurality of accommodating holes, and the plastic injection mold is installed in a plastic injection molding device, and the plastic injection molding device is provided with a control Unit, and the control unit controls the opening and closing of the upper mold and the lower mold, the injection hole injects plastic and the cooling medium flow of the cooling flow channel, the cooling flow channel is provided in the upper mold and the lower mold An inner flow channel and an outer flow channel, and the inner flow channel is closer to the mold cavity relative to the outer flow channel, and the control unit is connected with a flow control valve at the inlet end of the cooling flow channel, and the flow control valve is driven by the control unit To switch the flow mode of the cooling flow channel, the control unit is connected with a flow rate sensor, and the flow rate sensor is installed at the inlet end of the cooling flow channel, that is, the temperature of the plastic injection mold can be carried out by using different cooling medium flow rates For fine tuning, the control unit is connected to a liquid storage tank, and the control unit detects the temperature and the amount of cooling medium in the liquid storage tank, and the control unit is connected to a compressor, and the liquid storage tank is connected to the liquid storage tank by the compressor Flow direction control valve, and the liquid storage tank is also connected to the outlet end of the cooling flow channel, and the compressor is driven and controlled by the control unit, thereby forming the flow rate control of the cooling flow channel and the circulation of the cooling medium At least one heating rod, the heating rod is installed in the receiving hole of the plastic injection mold, and the heating rod is connected to the control unit, and the heating rod is used to perform preliminary heating on the plastic injection mold before injecting the plastic, so that the The plastic injection mold quickly recovers to be reprocessable, thereby reducing the waiting time for reprocessing; and At least one temperature sensor, the temperature sensor is installed in the accommodating hole of the plastic injection mold, and the temperature sensor is connected to the control unit, and the operation of the plastic injection mold is detected by the temperature sensor Temperature, and cooperate with the set temperature of the control unit and the heating control of the heating rod, and then the control unit determines the timing and flow rate of the cooling medium flowing into the cooling flow channel, thereby having an accurate temperature adjustment function of plastic injection molding processing. According to the temperature regulation device of the plastic injection mold described in item 1 of the patent application range, wherein the control unit uses the temperature sensor to determine that the mold cavity temperature is lower than the set temperature, the flow direction control valve is used to switch to form a rapid Cooling mode, low speed cooling mode and slow cooling mode, in the fast cooling mode, the inner flow channel and the outer flow channel are controlled to circulate the cooling medium at the same time, and in the low speed cooling mode, only the inner flow channel is controlled to circulate the cooling medium, and then slowly cool down In the mode, the cooling medium is only circulated by the outer flow channel. According to the temperature regulation device of the plastic injection mold according to item 1 of the patent application scope, wherein the control unit is connected to a radiator, and the radiator communicates between the outlet end of the cooling flow channel and the liquid storage tank, and The control unit can control the heat dissipation of the radiator, thereby controlling the temperature difference between the temperature of the cooling medium and the operating temperature to be kept within a range that will not damage the plastic injection mold. According to the temperature regulation device of the plastic injection mold according to item 1 of the patent application scope, wherein the control unit is connected to a control interface, and the control interface includes a display panel, the set temperature is input through the control interface and the display panel is viewed Cool state. According to the temperature regulating device of the plastic injection mold described in item 1 of the patent application scope, wherein the cooling medium in the cooling flow channel is water or a refrigerant.

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