CN116080004A - Micro injection molding die with temperature control structure and temperature control method - Google Patents

Abstract

The invention relates to a micro injection molding die, in particular to a micro injection molding die with a temperature control structure and a temperature control method. The device comprises a lower module and an upper module, wherein the upper module is moved to be attached to the lower module for injection molding; the upper module can realize injection molding work, and can also keep the temperature of the lower module in the injection molding process, so that the lower module is heated uniformly, and the problems of uneven color, luster defect and fused joint of an injection molding finished product are reduced; the upper module can inject cooling liquid into the lower module to rapidly cool the forming die in the lower module, and after the cooling work is completed, the cooling liquid with heat exchange forms a driving source through the lower module to separate the forming die in the lower module; the temperature control assembly is used for controlling heat preservation work of the lower module, controlling cooling liquid to flow after the heat preservation work is finished to rapidly cool the lower module, simultaneously having the effect of controlling the cooling liquid to flow to form a driving source, and being capable of driving the cooling liquid to flow back to the upper module to perform next cooling work.

Description

Micro injection molding die with temperature control structure and temperature control method

Technical Field

The invention relates to a micro injection molding die, in particular to a micro injection molding die with a temperature control structure and a temperature control method.

Background

Micro injection molding is an emerging technology which is developed faster in recent years, and is a manufacturing technology which can be used for repeatedly producing complex plastic parts with precise fine structures in batches; for micro injection molding dies, the prior art is very specific, for example:

chinese patent publication No. CN101549546B discloses a micro injection molding die temperature changing device, which comprises a wick heat pipe, a semiconductor refrigeration sheet, a copper plate, a water tank, a thermocouple and a temperature controller, wherein one side of the wick heat pipe is inserted into a die cavity plate, and the other side is inserted into the copper plate; both sides of the copper plate are contacted with the semiconductor refrigerating sheet, and the other side of the semiconductor refrigerating sheet is contacted with the water tank; coating a heat conducting layer on the upper surface and the lower surface of the semiconductor refrigerating sheet; the thermocouple is contacted with the surface of the die cavity and feeds back the temperature to the temperature controller, and the direction of the current of the semiconductor refrigerating sheet is controlled by a computer to determine the heating or cooling of the die. The temperature changing device can realize temperature changing control on the micro injection molding die and accurately and uniformly control the temperature of the die plate. The device has compact structure, can flexibly adapt to the limited space in the injection molding machine and the mold, and reduces the thermal deformation of the mold plate. The temperature changing device can be applied to the injection molding process of the micro plastic part, and solves the problem of die temperature control in the micro injection molding process.

As can be seen from the above, the temperature control for implementing micro injection molding is generally active temperature change, and is implemented by changing the active temperature, which can solve the problems in some injection molding processes by active temperature change in the prior art, but the energy utilization rate is low, the injection molding is usually more in production line, and the energy consumption is also larger.

Disclosure of Invention

The invention aims to provide a micro injection molding die with a temperature control structure and a temperature control method, so as to solve the problems in the prior art.

In order to achieve the above object, in one aspect, the present invention provides a micro injection molding mold with a temperature control structure, which includes a lower mold set and an upper mold set, wherein the upper mold set is moved to be attached to the lower mold set for injection molding; the upper module can realize injection molding work, and can also insulate heat of the lower module in the injection molding process, so that the lower module is heated uniformly, and the problems of uneven color, luster defect and fused seams of injection molding finished products are reduced; the upper module can inject cooling liquid into the lower module to rapidly cool the forming die in the lower module, and after the cooling work is completed, the cooling liquid with heat exchange forms a driving source through the lower module to separate the forming die in the lower module;

a temperature control assembly is arranged between the lower module and the upper module; the temperature control assembly is used for controlling heat preservation work of the lower module, controlling cooling liquid to flow after the heat preservation work is finished to rapidly cool the lower module, simultaneously controlling the cooling liquid to flow to form a driving source, and driving the cooling liquid to flow back to the upper module to perform next cooling work;

the lower module comprises a lower module, the upper module comprises an upper module, an injection cavity is formed in one face, close to the upper module, of the lower module, and used for solidifying and forming injected liquid plastic, temperature control pipelines are arranged in the lower module and are distributed in a net shape and used for entering heat preservation gas and cooling liquid, and the heat preservation gas and the cooling liquid are distributed in the upper module and used for fully preserving heat and cooling the inside of the injection cavity.

As a further improvement of the technical scheme, one surface of the lower module, which is close to the upper module, is provided with a plurality of connectors, and the connectors are communicated with the temperature control pipeline; a plurality of jacks are formed in one face, close to the lower module, of the upper module, and the connectors and the jacks are correspondingly spliced and matched respectively.

As a further improvement of the technical scheme, a thermal insulation bin is arranged on one surface of the upper module, far away from the lower module, an injection molding pipe is arranged at the center of the thermal insulation bin, a channel is formed in the injection molding pipe, the channel is communicated with an injection molding opening in the center of the upper module, and liquid plastic is injected into the injection molding cavity through the channel.

As a further improvement of the technical scheme, vent pipes are arranged on two sides of the injection molding pipe inside the thermal insulation bin, connecting pipes at two ends of the vent pipes are fixed inside the upper module, and connecting pipe ports of the vent pipes extend to the inside of the jack.

As a further improvement of the technical scheme, the injection molding pipe is provided with an air inlet pipe at the outer side of the channel, the air outlet of the air inlet pipe is communicated with one of the air pipes, the surface of the injection molding pipe is provided with a heat preservation valve, the heat preservation valve pumps air in the heat preservation bin into the air inlet pipe, and the opening at the center of the other air pipe is communicated with the heat preservation bin.

As the further improvement of this technical scheme, go up the module still including pushing away the liquid group, it is arranged in carrying the cooling liquid to the temperature control pipeline to push away the liquid group, it has the stock solution storehouse of cooling liquid to push away the liquid group including the inside storage, the stock solution storehouse is close to the one end of going up the module and is equipped with the feed liquor pipe, feed liquor pipe shape is similar with the breather pipe shape, the connecting pipe at feed liquor pipe both ends is fixed in last module to the connecting pipe port of feed liquor pipe extends to inside the jack, the inside sliding connection of stock solution storehouse has the ejector pad of toper structure.

As a further improvement of the technical scheme, a movable cavity is formed in one end, far away from the upper module, of the lower module, a push plate is slidably connected in the movable cavity, a plurality of push rods are arranged on one surface, close to the injection cavity, of the movable cavity, a plurality of sliding holes are formed in the lower module, a plurality of push rods are correspondingly connected with the sliding holes in a sliding mode respectively, and the push rods slidably penetrate through the sliding holes to enter the injection cavity.

As the further improvement of this technical scheme, the movable chamber is inside to use the push pedal as the parting line, will keep away from the one side in chamber of moulding plastics and form the drive chamber, the equal sliding connection in push pedal lower extreme both sides has the fluid-discharge tube, fluid-discharge tube one end and accuse temperature pipeline switch-on, and the other end runs through the fluid-discharge tube and gets into the drive intracavity, the temperature-sensing valve is installed to the junction of fluid-discharge tube and accuse temperature pipeline, the temperature-sensing valve can carry the inside coolant liquid of accuse temperature pipeline to the drive chamber in the movable chamber, forms the thrust to the push pedal when the drive intracavity liquid is full of.

As the further improvement of this technical scheme, lower module still includes the cooling storehouse, the cooling storehouse is fixed at lower module lower surface, the cooling storehouse is used for retrieving the coolant liquid to cool down the coolant liquid, cooling storehouse bottom both sides all are equipped with the back flow, stock solution storehouse side-mounting has the reflux pump, the export and the inside switch-on of stock solution storehouse of reflux pump, the import of reflux pump is through high temperature resistant hose and the switch-on of back flow.

In another aspect, the present invention provides a method for controlling temperature and injecting with the micro injection molding mold with a temperature controlling structure, comprising the following steps:

s1, firstly, setting a temperature value of a control switch of a temperature control valve, and then, driving a lower module to be close to an upper module by the operation of a hydraulic mechanism so as to enable the lower module to be tightly attached to the upper module;

s2, starting injection molding work, enabling liquid plastic to enter an injection molding cavity from a channel, starting a heat preservation valve to work, and bringing preheated gas into a temperature control pipeline for circulation heat preservation;

s3, after injection molding is finished, the heat preservation valve stops working, the hydraulic cylinder works to push the pushing block, and cooling liquid in the liquid storage bin is driven to enter the temperature control pipeline to cool plastic in the injection molding cavity;

s4, when the temperature of the cooling liquid is increased to a temperature value set by the temperature control valve, the temperature control valve starts to work, the cooling liquid is driven to enter the driving cavity, the hydraulic cylinder works to drive the pushing block to reset, the cooling liquid in the driving cavity increases to push the pushing plate to move, and molded plastic in the injection cavity is driven to be separated;

s5, after the material is removed, the temperature control valve stops working, the reset mechanism drives the push plate to reset, the liquid discharge valve drives the cooling liquid to enter the cooling bin, cold nitrogen is introduced into the cooling pipeline through the cooling air pipe to cool the cooling liquid in the cooling bin, and then the cooling liquid is driven to flow back into the liquid storage bin through the operation of the reflux pump to prepare for the next injection molding operation.

Compared with the prior art, the invention has the beneficial effects that:

1. in the micro injection molding die with the temperature control structure and the temperature control method, through the upper die set, injection molding work can be realized, and the lower die set can be insulated in the injection molding process, so that the lower die set is heated uniformly, and the problems of uneven color, luster defect and fused seam of an injection molding finished product are reduced; meanwhile, cooling liquid can be injected into the lower module through the upper module, the forming die in the lower module is cooled rapidly, and after the cooling work is completed, the heat exchange cooling liquid can be separated from the forming die in the lower module through a driving source formed by the lower module, so that the secondary utilization of energy is realized, and the energy consumption is reduced.

2. According to the micro injection molding die with the temperature control structure and the temperature control method, the temperature control assembly can control the heat preservation work of the lower die set, and after the heat preservation work is finished, the cooling liquid is controlled to flow so as to rapidly cool the lower die set, meanwhile, the micro injection molding die has the function of controlling the cooling liquid to flow so as to form a driving source, and the cooling liquid can be driven to flow back to the upper die set so as to perform the next cooling work; the purpose of recycling the cooling liquid for a plurality of times is realized.

Drawings

FIG. 1 is a schematic diagram of the overall structure of the present invention;

FIG. 2 is a schematic diagram of a lower module structure according to the present invention;

FIG. 3 is a schematic diagram of the upper module structure of the present invention;

FIG. 4 is a schematic view of a lower module structure of the present invention;

FIG. 5 is a schematic diagram of the upper module structure of the present invention;

FIG. 6 is a schematic view of an injection molded tube according to the present invention;

FIG. 7 is a schematic view of a vent pipe according to the present invention;

FIG. 8 is a schematic cross-sectional view of an injection molded tube according to the present invention;

FIG. 9 is a schematic diagram of a pushing assembly according to the present invention;

FIG. 10 is a second schematic diagram of the lower module structure of the present invention;

FIG. 11 is a schematic view of a push plate structure according to the present invention;

FIG. 12 is a schematic view of the movable chamber structure of the present invention;

FIG. 13 is a schematic view of the cooling cartridge structure of the present invention;

FIG. 14 is a schematic view of a cooling duct structure according to the present invention;

fig. 15 is a schematic structural diagram of a temperature control assembly according to the present invention.

The meaning of each reference sign in the figure is:

10. a lower module;

11. a lower module; 110. an injection cavity; 110A, slide hole; 111. a temperature control pipe; 112. a movable cavity; 113. a temperature control valve; 114. a liquid discharge valve; 115. a connector;

12. a push plate; 121. a push rod; 122. a liquid discharge pipe;

13. a cooling bin; 131. a liquid inlet; 132. a return pipe; 133. a cooling pipe; 134. a cooling air pipe;

14. a reset mechanism; 141. a reset lever; 142. a slide bar; 143. a spring;

20. an upper module;

21. an upper module; 210. a jack;

22. a thermal insulation bin; 221. injection molding a tube; 221A, channels; 221B, an air inlet pipe; 222. a thermal insulation valve; 23. a vent pipe;

30. a pushing group;

31. a liquid storage bin; 311. a reflux pump; 32. a liquid inlet pipe; 33. a pushing block; 34. and a hydraulic cylinder.

Description of the embodiments

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Examples

Referring to fig. 1, an objective of the present embodiment is to provide a micro injection molding mold with a temperature control structure, which includes a lower mold set 10 and an upper mold set 20, wherein the upper mold set 20 is moved to be attached to the lower mold set 10 for injection molding, so that the molding work of plastic can be realized in the lower mold set 10; the upper die set 20 not only can realize injection molding work, but also can keep the temperature of the lower die set 10 in the injection molding process, so that the lower die set 10 is heated uniformly, and the problems of uneven color, luster defect and fused seams of injection molding finished products are reduced; further, the upper module 20 can also be used for injecting cooling liquid into the lower module 10 to rapidly cool the forming die in the lower module 10, and after the cooling work is completed, the cooling liquid with heat exchange forms a driving source through the lower module 10 to separate the forming die in the lower module 10;

wherein, a temperature control component is arranged between the lower module 10 and the upper module 20; the temperature control component is used for controlling the heat preservation work of the lower module 10, controlling the flow of the cooling liquid to cool the lower module 10 rapidly after the heat preservation work is finished, simultaneously controlling the flow of the cooling liquid to form a driving source, and driving the cooling liquid to flow back to the upper module 20 for the next cooling work.

On the basis of the above, the present embodiment specifically describes the lower module 10 and the upper module 20; referring to fig. 2-5, in the embodiment, the lower module 10 includes a lower module 11, the upper module 20 includes an upper module 21, an injection cavity 110 is formed on a surface of the lower module 11, which is close to the upper module 21, for solidifying and forming the injected liquid plastic, a temperature control pipeline 111 is disposed inside the lower module 11, the temperature control pipeline 111 is in a net-shaped distribution, and is used for entering heat preservation gas and cooling liquid, and the heat preservation gas and the cooling liquid are distributed in the upper module 20, so as to be convenient for fully preserving and cooling the inside of the injection cavity 110; the upper module 21 is tightly attached to the surface of the lower module 11 during injection molding operation, so that the injection molding cavity 110 can form a closed space, thereby realizing injection molding operation; further, a plurality of connectors 115 are arranged on one surface of the lower module 11 close to the upper module 21, and the connectors 115 are communicated with the temperature control pipeline 111; the upper module 21 is provided with a plurality of jacks 210 on one surface close to the lower module 11, and a plurality of connectors 115 and a plurality of jacks 210 are correspondingly spliced and matched respectively, so that the lower module 11 and the upper module 21 are firmly fixed, and the heat-insulating gas and the cooling liquid are conveniently transmitted into the temperature control pipeline 111 through the connectors 115 through the jacks 210.

According to the embodiment shown in fig. 6 to 8, a thermal insulation bin 22 is arranged on one surface of the upper module 21 far away from the lower module 11, an injection molding pipe 221 is arranged at the center of the thermal insulation bin 22, a channel 221A is formed in the injection molding pipe 221, the channel 221A is communicated with an injection molding opening at the center of the upper module 21, and liquid plastic can be injected into the injection molding cavity 110 through the channel 221A; in addition, the two sides of the injection molding pipe 221 inside the thermal insulation bin 22 are respectively provided with a vent pipe 23, connecting pipes at two ends of the vent pipe 23 are fixed inside the upper module 21, and connecting pipe ports of the vent pipe 23 extend into the jack 210, so that thermal insulation gas can conveniently enter the temperature control pipeline 111 through the vent pipe 23; the injection molding pipe 221 is provided with an air inlet pipe 221B at the outer side of the channel 221A, the air outlet of the air inlet pipe 221B is communicated with one of the air pipes 23, a heat preservation valve 222 is arranged on the surface of the injection molding pipe 221, the heat preservation valve 222 can pump air in the heat preservation bin 22 into the air inlet pipe 221B, and an opening at the center of the other air pipe 23 is communicated with the heat preservation bin 22; when the liquid plastic with higher temperature is injected from the channel 221A, the temperature of the gas in the thermal insulation bin 22 can be raised through heat transfer, so that when the thermal insulation valve 222 works, the gas in the thermal insulation bin 22 can be conveyed into the temperature control pipeline 111 through one vent pipe 23, and the gas can be conveyed into the thermal insulation bin 22 again through the other vent pipe 23, thereby achieving the purpose of hot gas circulation and further achieving the purpose of thermal insulation of the injection cavity 110.

According to fig. 9, after the heat preservation operation is completed during injection molding, the upper module 20 further includes a liquid pushing group 30, the liquid pushing group 30 is used for conveying cooling liquid into the temperature control pipeline 111, cooling the molded plastic for later demolding, the liquid pushing group 30 includes at least a liquid storage bin 31 with cooling liquid stored therein, a liquid inlet pipe 32 is disposed at one end of the liquid storage bin 31 near the upper module 21, the shape of the liquid inlet pipe 32 is similar to that of the vent pipe 23, connecting pipes at two ends of the liquid inlet pipe 32 are fixed in the upper module 21, and connecting pipe ports of the liquid inlet pipe 32 extend into the jack 210, so that the cooling liquid can enter the temperature control pipeline 111 through the liquid inlet pipe 32; wherein, the liquid storage bin 31 is of a conical structure, the inside of the liquid storage bin 31 is slidably connected with a push block 33 of the conical structure, when the push block 33 slides to the liquid inlet pipe 32 to approach, the generated extrusion force can drive the cooling liquid in the liquid storage bin 31 to be discharged by the liquid inlet pipe 32, further, the liquid pushing group 30 further comprises a hydraulic cylinder 34, a piston rod of the hydraulic cylinder 34 penetrates through the liquid storage bin 31 and is fixedly connected with the push block 33, and the push block 33 can be driven to move by the hydraulic cylinder 34.

In addition, in order to avoid that the cooling liquid entering the temperature control pipeline 111 is far away from the lower module 11 in the upper module 21, leakage may occur from the connector 115, so that a closing pad is arranged at the opening of the connector 115, the closing pad is made of heat-resistant rubber, and the closing pad is deformed only when being subjected to external pushing force, so that the opening of the connector 115 is opened, namely, when the upper module 21 is attached to the lower module 11, the vent pipe 23 and the liquid inlet pipe 32 are inserted into the connector 115, and thus pushing force is formed on the closing pad;

in addition, the two ends of the top surface of the thermal insulation bin 22 are both provided with the exhaust ports with the closed pads, when the temperature inside the thermal insulation bin 22 is higher, the internal gas generates high pressure due to thermal expansion, and the high pressure gas can form thrust to the closed pads of the exhaust ports, so that the exhaust effect is realized.

In order to realize that the cooling liquid forms a driving source after the cooling work is completed, the forming die in the injection cavity 110 is separated, therefore, according to the fig. 10-12, one end, far away from the upper module 21, of the inner part of the lower module 11 is provided with a movable cavity 112, the inner part of the movable cavity 112 is slidably connected with a push plate 12, one surface, close to the injection cavity 110, of the movable cavity 112 is provided with a plurality of push rods 121, the inner part of the lower module 11 is provided with a plurality of sliding holes 110A, the plurality of push rods 121 are respectively correspondingly and slidably connected with the plurality of sliding holes 110A, the push rods 121 slidably penetrate through the sliding holes 110A to enter the inner part of the injection cavity 110, and thrust is generated for forming plastics in the injection cavity 110 so as to realize stripping; in order to realize the driving of the push plate 12, the inside of the movable cavity 112 takes the push plate 12 as a parting line, one side far away from the injection cavity 110 forms a driving cavity, two sides of the lower end of the push plate 12 are both connected with a liquid discharge pipe 122 in a sliding way, one end of the liquid discharge pipe 122 is communicated with the temperature control pipeline 111, the other end of the liquid discharge pipe 122 penetrates through the liquid discharge pipe 122 to enter the driving cavity, a temperature control valve 113 is arranged at the joint of the liquid discharge pipe 122 and the temperature control pipeline 111, the temperature control valve 113 is a miniature electronic temperature control valve, and when the temperature reaches a set value, the working is started; when the cooling liquid flows in the temperature control pipeline 111, heat exchange is carried out with heat generated by molding plastic in the injection molding cavity 110, so that the temperature of the cooling liquid is continuously increased, when the specified temperature is reached, the temperature control valve 113 can be started to work, the cooling liquid in the temperature control pipeline 111 can be conveyed into a driving cavity of the movable cavity 112 through the temperature control valve 113, when the liquid in the driving cavity is full, thrust force can be formed on the push plate 12, the thrust force drives the push plate 12 to move, and the push rod 121 is driven to slide, so that the demolding effect on the molding plastic in the injection molding cavity 110 is realized.

When the stripping operation is completed, the cooling liquid is recovered, and the push plate 12 is reset so as to facilitate the next injection molding operation, and according to fig. 13 and 14, the lower module 10 further includes a cooling bin 13, wherein the cooling bin 13 is fixed on the lower surface of the lower module 11, and the cooling bin 13 is used for recovering the cooling liquid and cooling the cooling liquid; specifically, the top end of the cooling bin 13 is provided with a liquid inlet 131, a liquid discharge valve 114 is arranged at the outlet of the bottom end of the driving cavity of the movable cavity 112, the outlet of the liquid discharge valve 114 is communicated with the liquid inlet 131, and cooling liquid in the driving cavity can be conveyed into the cooling bin 13 through the operation of the liquid discharge valve 114; in order to realize cooling of the cooling liquid, the bottom end of the cooling bin 13 is provided with cooling pipelines 133, the cooling pipelines 133 are distributed in a net shape, meanwhile, both sides of the bottom end of the cooling bin 13 are provided with cooling air pipes 134 communicated with the cooling pipelines 133, the cooling air pipes 134 are used for conveying cold nitrogen, and when the cold nitrogen flows in the cooling pipelines 133, the temperature inside the cooling bin 13 can be reduced through heat transfer, so that the effect of cooling the cooling liquid is realized;

and realize that cooling liquid after the cooling still needs to flow back to liquid storage storehouse 31 in, consequently, cooling storehouse 13 bottom both sides all are equipped with back flow 132, and liquid storage storehouse 31 side-mounting has back flow pump 311, and the export of back flow pump 311 is put through with liquid storage storehouse 31 inside, and the import of back flow pump 311 is put through with back flow 132 through high temperature resistant hose, can pump cooling liquid after the cooling to liquid storage storehouse 31 inside through back flow 132 work and carry out the cooling work next time.

When the cooling liquid is discharged from the driving cavity, the push plate 12 needs to be reset to ensure that the next work is normally performed, and therefore, the lower module 11 is provided with a reset mechanism 14 for driving the push plate 12 to reset; specifically, the reset mechanism 14 includes a reset rod 141, the reset rod 141 is fixedly connected with the lower module 11, a slide rod 142 is slidably connected in the reset rod 141, one end of the slide rod 142 is located in the driving cavity and is fixedly connected with the push plate 12, meanwhile, a spring 143 is arranged in the reset rod 141, one end of the spring 143 is fixedly connected with the slide rod 142, when the push plate 12 is displaced, a pulling force is formed on the slide rod 142, the pulling force drives the spring 143 to deform, and when the push plate 12 loses the pushing force of the cooling liquid, the push plate 12 can be driven to reset by the resilience force generated by deformation of the spring 143.

Examples

In this embodiment, based on the above embodiment 1, a temperature control assembly is specifically described, and according to fig. 15, in this embodiment, the temperature control assembly is composed of a temperature control valve 113, a drain valve 114, a heat preservation valve 222, a return pump 311 and a hydraulic cylinder 34, and a specific working procedure is as follows: when the injection molding work starts, the heat preservation valve 222 synchronously starts to work, preheated gas is brought into the temperature control pipeline 111 to circularly preserve heat, after injection molding is completed, the heat preservation valve 222 stops working, the hydraulic cylinder 34 starts to work, cooling liquid is driven to be injected into the temperature control pipeline 111 to cool, when the temperature of the cooling liquid in the temperature control pipeline 111 is raised to a specified temperature through heat exchange, the temperature control valve 113 starts to work, the cooling liquid is driven to enter the driving cavity, the hydraulic cylinder 34 works to drive the pushing block 33 to reset, after the stripping work is completed, the temperature control valve 113 stops working, the liquid discharge valve 114 starts to drive the cooling liquid to enter the cooling bin 13 to cool, after cooling is completed, the liquid discharge valve 114 stops working, and the reflux pump 311 starts to drive the cooling liquid to return to the liquid storage bin 31.

Examples

Based on the above embodiments 1 and 2, this embodiment proposes a temperature control method for a micro injection molding mold with a temperature control structure, including the following steps:

s1, firstly, setting a temperature value of a control switch of a temperature control valve 113, and then, operating a hydraulic mechanism to push a lower module 10 to be close to an upper module 20 so as to enable the lower module 11 to be tightly attached to an upper module 21;

s2, starting injection molding operation, wherein liquid plastic enters the injection molding cavity 110 from the channel 221A, and simultaneously starting the heat preservation valve 222 to operate so as to bring preheated gas into the temperature control pipeline 111 for circulation heat preservation;

s3, after injection molding is finished, the heat preservation valve 222 stops working, the hydraulic cylinder 34 works to push the pushing block 33, and cooling liquid in the liquid storage bin 31 is driven to enter the temperature control pipeline 111 to cool the plastic in the injection molding cavity 110;

s4, when the temperature of the cooling liquid is increased to a temperature value set by the temperature control valve 113, the temperature control valve 113 starts to work, the cooling liquid is driven to enter the driving cavity, the hydraulic cylinder 34 works to drive the push block 33 to reset, the cooling liquid in the driving cavity increases to push the push plate 12 to move, and the molded plastic in the injection cavity 110 is driven to be separated;

s5, after the material is removed, the temperature control valve 113 stops working, the reset mechanism 14 drives the push plate 12 to reset, the liquid discharge valve 114 works to drive cooling liquid to enter the cooling bin 13, cold nitrogen is introduced into the cooling pipeline 133 through the cooling air pipe 134 to cool the cooling liquid in the cooling bin 13, and then the cooling liquid is driven to flow back into the liquid storage bin 31 through the operation of the reflux pump 311 to prepare for the next injection molding work.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (10)

1. A micro injection molding mould with a temperature control structure is characterized in that: comprises a lower die set (10) and an upper die set (20), wherein the upper die set (20) is moved to be attached to the lower die set (10) for injection molding; the upper module (20) not only can realize injection molding work, but also can keep the temperature of the lower module (10) in the injection molding process, so that the lower module (10) is heated uniformly; the upper module (20) can inject cooling liquid into the lower module (10) to rapidly cool the forming die in the lower module (10), and after cooling work is completed, the cooling liquid with heat exchange forms a driving source through the lower module (10) to separate the forming die in the lower module (10);

a temperature control assembly is arranged between the lower module (10) and the upper module (20); the temperature control assembly is used for controlling heat preservation work of the lower module (10), controlling cooling liquid to flow after the heat preservation work is finished so as to rapidly cool the lower module (10), simultaneously controlling the cooling liquid to flow to form a driving source, and driving the cooling liquid to flow back to the upper module (20) so as to perform next cooling work;

the lower module (10) comprises a lower module (11), the upper module (20) comprises an upper module (21), an injection molding cavity (110) is formed in the position, close to the upper module (21), of the lower module (11) for solidifying and molding injected liquid plastic, a temperature control pipeline (111) is arranged in the lower module (11), the temperature control pipeline (111) is in net-shaped distribution and used for entering heat preservation gas and cooling liquid, and the heat preservation gas and the cooling liquid are distributed in the upper module (20) and used for fully preserving heat and cooling the inside of the injection molding cavity (110).

2. The micro injection molding mold with a temperature control structure according to claim 1, wherein: one surface of the lower module (11) close to the upper module (21) is provided with a plurality of connectors (115), and the connectors (115) are communicated with the temperature control pipeline (111); one surface of the upper module (21) close to the lower module (11) is provided with a plurality of jacks (210), and a plurality of connectors (115) and a plurality of jacks (210) are respectively in corresponding plug-in fit.

3. The micro injection molding mold with a temperature control structure according to claim 1, wherein: the one side that goes up module (21) and keep away from lower module (11) is equipped with heat preservation storehouse (22), the center department of heat preservation storehouse (22) is equipped with injection molding pipe (221), inside passageway (221A) of having seted up of injection molding pipe (221), passageway (221A) are put through with the mouth of moulding plastics of last module (21) center department, and liquid plastics pours into injection molding cavity (110) through passageway (221A).

4. A micro injection molding mold with a temperature control structure according to claim 3, wherein: the inside both sides that are located injection molding pipe (221) of heat preservation storehouse (22) all are equipped with breather pipe (23), the connecting pipe at breather pipe (23) both ends is fixed in last module (21) inside, just the connecting pipe port of breather pipe (23) extends to jack (210) inside.

5. The micro injection molding mold with a temperature control structure according to claim 4, wherein: the injection molding pipe (221) is located outside the channel (221A) and is provided with an air inlet pipe (221B), an air outlet of the air inlet pipe (221B) is communicated with one of the air pipes (23), a heat preservation valve (222) is arranged on the surface of the injection molding pipe (221), the heat preservation valve (222) pumps air in the heat preservation bin (22) into the air inlet pipe (221B), and an opening in the center of the other air pipe (23) is communicated with the heat preservation bin (22).

6. The micro injection molding mold with a temperature control structure according to claim 5, wherein: the upper module (20) further comprises a liquid pushing group (30), the liquid pushing group (30) is used for conveying cooling liquid into the temperature control pipeline (111), the liquid pushing group (30) at least comprises a liquid storage bin (31) for storing the cooling liquid inside, one end, close to the upper module (21), of the liquid storage bin (31) is provided with a liquid inlet pipe (32), the shape of the liquid inlet pipe (32) is similar to that of the vent pipe (23), connecting pipes at two ends of the liquid inlet pipe (32) are fixed in the upper module (21), connecting pipe ports of the liquid inlet pipe (32) extend into the jack (210), and pushing blocks (33) of conical structures are connected inside the liquid storage bin (31) in a sliding mode.

7. The micro injection molding mold with a temperature control structure according to claim 1, wherein: the utility model discloses a movable cavity (112) has been seted up to the one end that goes up module (21) is kept away from to lower module (11) inside, movable cavity (112) inside sliding connection has push pedal (12), movable cavity (112) are close to the one side of moulding plastics chamber (110) and are equipped with a plurality of push rod (121), a plurality of slide hole (110A) have been seted up to lower module (11) inside, a plurality of push rod (121) correspond respectively with a plurality of slide hole (110A) sliding connection, just push rod (121) slidable runs through slide hole (110A) and gets into inside moulding plastics chamber (110).

8. The micro injection molding mold with a temperature control structure according to claim 7, wherein: the movable cavity (112) is internally provided with a push plate (12) serving as a parting line, one side far away from the injection cavity (110) forms a driving cavity, two sides of the lower end of the push plate (12) are slidably connected with a liquid discharge pipe (122), one end of the liquid discharge pipe (122) is communicated with a temperature control pipeline (111), the other end of the liquid discharge pipe penetrates through the liquid discharge pipe (122) to enter the driving cavity, a temperature control valve (113) is arranged at the joint of the liquid discharge pipe (122) and the temperature control pipeline (111), the temperature control valve (113) can convey cooling liquid inside the temperature control pipeline (111) into the driving cavity of the movable cavity (112), and thrust is formed on the push plate (12) when liquid in the driving cavity is full.

9. The micro injection molding mold with a temperature control structure according to claim 6, wherein: the lower module (10) further comprises a cooling bin (13), the cooling bin (13) is fixed on the lower surface of the lower module (11), the cooling bin (13) is used for recycling cooling liquid and cooling the cooling liquid, return pipes (132) are arranged on two sides of the bottom end of the cooling bin (13), a reflux pump (311) is arranged on the side face of the liquid storage bin (31), an outlet of the reflux pump (311) is communicated with the interior of the liquid storage bin (31), and an inlet of the reflux pump (311) is communicated with the return pipes (132) through a high-temperature-resistant hose.

10. A method of temperature controlled injection molding using the micro injection molding die with temperature controlled structure of any one of claims 1 to 9, comprising the steps of:

s1, firstly, setting a temperature value of a control switch of a temperature control valve (113), and then, operating a hydraulic mechanism to push a lower module (10) to be close to an upper module (20) so as to enable the lower module (11) to be tightly attached to an upper module (21);

s2, starting injection molding work, enabling liquid plastic to enter an injection molding cavity (110) through a channel (221A), starting a heat preservation valve (222) to work, and bringing preheated gas into a temperature control pipeline (111) for circulation heat preservation;

s3, after injection molding is finished, the heat preservation valve (222) stops working, the hydraulic cylinder (34) works to push the pushing block (33) to drive cooling liquid in the liquid storage bin (31) to enter the temperature control pipeline (111) so as to cool plastic in the injection molding cavity (110);

s4, when the temperature of the cooling liquid is increased to a temperature value set by the temperature control valve (113), the temperature control valve (113) starts to work to drive the cooling liquid to enter the driving cavity, the hydraulic cylinder (34) works to drive the pushing block (33) to reset, and the cooling liquid in the driving cavity is increased to push the pushing plate (12) to displace to drive the molded plastic in the injection molding cavity (110) to be separated;

s5, after the material is removed, the temperature control valve (113) stops working, the reset mechanism (14) drives the push plate (12) to reset, the liquid discharge valve (114) works to drive cooling liquid to enter the cooling bin (13), cold nitrogen is introduced into the cooling pipeline (133) through the cooling air pipe (134), the cooling liquid in the cooling bin (13) is cooled, and then the reflux pump (311) works to drive the cooling liquid to flow back into the liquid storage bin (31) for preparation of next injection molding.

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