TWI409161B - Mold device with uniform pressure and molding method thereof - Google Patents

Abstract

The present invention discloses an isostatic forming mold and an isostatic forming method thereof. The isostatic forming mold comprises the following components: a first mold which is provided with a hydraulic tank and a mold chamber, wherein the hydraulic tank is internally provided with a temperature control coil pipe and the mold chamber is provided with a first mold plate; and a second mold which corresponds with the first mold and can be matched with the first mold for forming a whole mold. Furthermore the second mold is provided with a second mold plate which corresponds with the first mold plate. According to the isostatic forming mold, a purpose of performing press printing on the surface of a light guide plate uniformly can be obtained through performing hydrualic pressing and heating on the inner part of the hydraulic tank.

Description

Pressure forming mold and pressure forming method thereof

The invention relates to a pressure equalizing forming die and a pressure forming forming method thereof, and particularly to a light guiding plate forming device and a method for uniformly pressurizing a temperature controlled liquid.

The conventional light guide plate (LGP) hot press forming method mainly places the object to be embossed in a cavity of an imprint mold, and the imprint mold comprises a set of upper first templates, and the first template has a Embossing the embossed surface of the optical grain, and placing the embossed material between the surface of the first template having the embossed optical grain, and closing the embossing die, at which time the first template forms a closed cavity, and the embossed material That is, in the closed cavity, after the embossing die is closed, the embossing die is heated to soften the embossed material to a plastic state, and then the embossing die presses the embossed material to make the embossing pattern of the first template The embossed material is molded, and finally the embossed material is cooled, and the embossing mold is opened to take out the molded product.

In the prior art, the pressing device uses oil pressure, air pressure or other driver as a source of output pressure, and the crankshaft or the shaft is directly connected to the imprinting mold to apply pressure to the template. Compared with the shaft for transmitting pressure, the template is large-area. Plane, so the pressure transmitted by the shaft to the stencil can be regarded as a point of pressure, so it is not easy to make the stencil fully pressed. Therefore, the embossed material pressed through the stencil is not evenly stressed. Therefore, the yield of the embossed product is not easy to be improved, and the size of the embossed product can only be molded into a small-sized product, followed by the introduction of a multi-axial pressing device and the use of a silicone plate as a cushioning material, the effect is only slightly improve.

And the conventional heating device is configured to drill a water path on the first template or the imprinting mold, and then heat or cool the embossing material by using a hot liquid or a cold liquid; or a heat pipe and a water path cross configuration, and the heat pipe is used for Heating the embossed material, and then cooling the embossed material with a cold liquid in the water path. The above-mentioned conventional heating method is to heat the embossing mold body first, and then transfer the heat energy to the embossing material through heat conduction. The transfer is easily caused by the size of the imprinting mold, the position of the heating pipe or the waterway buried, and the size of the imprinted material, etc., and the transfer is not uniform, and the embossing softening unevenness occurs, so that the finished product is embossed. The yield is not easy to be improved. Therefore, based on the above reasons, the inventors of the present invention have considered and designed a pressure equalizing mold and a pressure equalizing method thereof, in order to improve the lack of the prior art, thereby enhancing the industrial use and utilization.

In view of the above-mentioned problems, the main object of the present invention is to provide a pressure equalizing mold and a pressure forming method thereof, in order to overcome the difficulties of the prior art.

In order to achieve the above object, the technical means adopted by the present invention is to design a pressure forming mold comprising: a first mold having a first main shell, and the first main shell is recessed on a working surface side There is a first chamber, and the first chamber is provided with an elastic heat transfer mold transversely from an opening, and the elastic heat transfer mold divides the first chamber into a hydraulic pressure a slot and a cavity, wherein a wall of the hydraulic groove is connected to an inlet pipe and a drain pipe outside the first main casing, and a temperature control coil is arranged in the hydraulic groove, the control The temperature coil has a temperature control liquid inlet end and a temperature control liquid outlet end, and the temperature control liquid inlet end and the temperature control liquid outlet end extend out of the first main shell, and the outer side wall surface of the elastic heat conductive film Further, a first template is disposed on the outer surface of the first template, and a concave and convex structure corresponding to the optical texture to be printed is disposed; a second mold corresponding to the first mold and combinable with the first mold Forming a complete mold, the second mold includes a second main casing, and the second main casing is concavely disposed on a side of the upper working surface thereof with a second chamber, and the second chamber is provided with a temperature control plate, and Further, a temperature control flow channel is further disposed in the temperature control plate, and a liquid injection pipe and a liquid discharge pipe are respectively connected to the two ends of the temperature control flow channel, and the liquid injection pipe and the liquid discharge pipe extend through the second a main casing, and further comprising a second template on one of the outer wall surfaces of the temperature control plate, the second template corresponding to a first template, and an outer surface of the second template is provided with a concave-convex structure corresponding to the optical texture to be printed; and at least one vacuum control pipeline corresponding to the cavity for the first mold and the When the second mold is joined, the cavity is evacuated or vacuumed.

Wherein, a second thermal insulation layer is further disposed between the temperature control plate and the second main casing as a thermal insulation measure with the second main casing, and wherein the second thermal insulation layer selectively corresponds to the first The second main casing is moved toward the outer side or the inner side; wherein the second heat insulating layer selectively restricts the movement on the second main shell through a fixing device as a means for corresponding fixing; wherein The first main casing and the second main casing are made of metal; wherein, between the hydraulic tank and the first main casing A first heat insulation layer is disposed in one step; wherein the vacuum control line is disposed on the first mold or the second mold; wherein the temperature control plate is made of metal.

In addition, the present invention further provides a pressure forming method for a pressure forming mold, which comprises: A. placing a sheet to be stamped, which is to adjust the position of the second heat insulating layer corresponding to the second main shell, and further Between the first template and the second template, after the first mold and the second mold are clamped, corresponding to a plate to be embossed, and the plate to be embossed is placed in the cavity, and then Driving the first mold and the second mold to abut each other to be joined to each other to fix the plate to be embossed; B. a clamping step of extracting the air inside the cavity from the vacuum control line a vacuum state, which in turn allows the first mold to be fixed in combination with the second mold; C. a step of softening and softening the sheet to be embossed, which is to first pre-fill the hydraulic tank with a liquid for pressing, and in the temperature control tray The high temperature liquid is injected into the tube through the temperature control liquid inlet end, and then the hydraulic pressure tank is heated by the temperature control coil, and at the same time, the high temperature liquid is injected from the liquid injection tube to the temperature control flow path to heat the temperature control plate. And the hydraulic tank and the high temperature of the temperature control plate make the pressure to be pressed The surface of the sheet is softened; D. a step of pressurizing the liquid in the hydraulic tank through the liquid inlet line, thereby increasing the pressure in the hydraulic tank and thereby pressing the first template Uniformly applied to the plate to be embossed and pressed to the second template, thereby embossing the corresponding optical grain on the plate to be embossed; E. step of cooling the plate to be embossed And discharging the internal high temperature liquid through the temperature control liquid discharge end in the temperature control coil, and injecting through the temperature control liquid inlet end a liquid lower than normal temperature to lower the temperature of the hydraulic pressure tank, and also discharge the high temperature liquid in the temperature control flow passage through the liquid discharge pipe, and further inject a liquid lower than the normal temperature to lower the temperature of the temperature control plate, And then cooling the hydraulic plate and the temperature control plate to cool the plate to be embossed to be hardened due to a decrease in temperature; and F. a step of lowering through the drain line through the drain line Pressing the liquid to reduce the pressure of the hydraulic pressure tank; and G. a mold opening step of injecting air into the cavity through the vacuum control line, thereby breaking the vacuum state in the cavity, and A mold and the second mold are separated, and the transferred sheet to be embossed is taken out.

The liquid for pressing in the hydraulic tank is oil; and the liquid injected into the temperature control coil and the temperature control flow channel is water, oil or a mixture thereof.

The pressure-shaping mold and the pressure-shaping forming method thereof are designed to use a heated liquid as a heat source and a thin-thickness heat-conductive film as a medium, so that uniform heat transfer can be achieved, and the object to be embossed can be obtained. The surface is evenly softened by heat, and because the high-pressure liquid is used as the pressure source, it is pressed by the force of the uniform directionality of the liquid, so that the points on the embossed material can be uniformly pressed without uneven force and the printing is affected. The yield is disturbed, and because the high-pressure liquid is used as the pressure source, it is affected by the force distribution of the liquid molecules, and the size of the object to be embossed is not limited, which helps to improve the efficiency of the production operation.

(10)‧‧‧First mould

(11)‧‧‧First main shell

(12)‧‧‧Elastic thermal mode

(13)‧‧‧Hydraulic trough

(131)‧‧‧Inlet line

(132)‧‧‧Draining line

(14) ‧‧‧ cavity

(15) ‧‧‧First insulation

(16) ‧‧‧temperature control coil

(161) ‧‧‧temperature-controlled liquid inlet

(162) ‧‧‧ Temperature-controlled liquid outlet

(17) ‧‧‧ first template

(20)‧‧‧Second mold

(21)‧‧‧Second main shell

(22) ‧‧‧temperature control board

(221) ‧‧‧temperature-controlled runners

(222)‧‧‧Injection tube

(223)‧‧‧Draining tube

(23) ‧‧‧Second insulation

(24) ‧‧‧Fixed devices

(25) ‧‧‧Second template

(30)‧‧‧ Vacuum control line

(90) ‧ ‧ embossed plates

The first figure is a side cross-sectional exploded view of a pressure equalizing mold of the present invention.

Figure 2 is a side cross-sectional view of a pressure equalizing mold of the present invention.

Fig. 3 is a side elevational cross-sectional view showing an embodiment of a pressure equalizing mold of the present invention .

The fourth figure is a flow chart of the steps of the pressure equalization molding method of the pressure equalizing mold of the present invention.

The invention will be described with reference to the accompanying drawings, and the description of the embodiments will be described in detail with reference to the accompanying drawings. The subject matter is only for the purpose of illustration and supplementary description. It is not necessarily the true proportion and precise configuration after the implementation of the present invention. Therefore, the proportion of the attached drawings and the configuration relationship should not limit the scope of patent application of the present invention in actual implementation. First described.

Referring to the first and second figures, the present invention is a pressure forming mold, which in a preferred embodiment comprises a first mold (10), a second mold (20) and at least one vacuum control. Pipeline (30).

The first mold (10) includes a first main casing (11), and the first main casing (11) may be made of metal, and the first main casing (11) is concave on the upper working surface thereof. A first chamber is disposed, and the first chamber is provided with an elastic heat transfer mold (12) transversely from an opening, and the elastic heat transfer mold (12) further partitions the first chamber into a flexible portion a hydraulic groove (13) inside the heat conductive film (12) and a cavity (14) located outside the elastic heat conductive film (12), and further disposed between the hydraulic groove (13) and the first main case (11) There is a first heat insulation layer (15) as a heat insulation measure with the first main casing (11), and wherein a wall surface of the hydraulic pressure tank (13) is provided to communicate with the first main casing (11) a liquid inlet line (131) and a drain line (132) for supplying and discharging a pressurized liquid, and in the hydraulic tank (13) Further, a temperature control coil (16) is further disposed inside, which is a coiled tube, and the temperature control coil (16) has a temperature control liquid inlet end (161) and a temperature control liquid outlet end (162). The temperature control liquid inlet end (161) and the temperature control liquid discharge end (162) both extend out of the first main casing (11) for inflow and discharge of a temperature control liquid, and further, the elastic heat conductive film A first template (17) is further disposed on one of the outer side wall surfaces, and the first template (17) is provided on one of its outer side surfaces with a concave-convex structure corresponding to the optical texture to be printed.

The aforementioned second mold (20) corresponding to the first mold (10) and can be combined with the first mold (10) to form a complete mold, the second mold (20) comprising a second main shell ( 21) The second main casing (21) may be made of metal, and the second main casing (21) is recessed into a second chamber on a side of the upper working surface thereof, and the second chamber is disposed. There is a high thermal conductivity temperature control plate (22), the temperature control plate (22) may be made of metal, and a temperature control flow channel (221) is further disposed in the temperature control plate (22), and the temperature control is performed. A liquid injection pipe (222) and a liquid discharge pipe (223) are respectively connected to the two ends of the flow passage (221), and the liquid injection pipe (222) and the liquid discharge pipe (223) extend out of the second main casing ( 21), in which the liquid can be injected and discharged, and the temperature of the temperature control plate (22) is controlled in this manner, and a further between the temperature control plate (22) and the second main casing (21) is further provided. The second heat insulating layer (23) serves as a heat insulating measure between the second main casing (21), and please refer to the third figure, wherein the second heat insulating layer (23) can selectively correspond to the The second main casing (21) moves toward the outside or inside, and is permeable. The fixing device (24) selectively restricts its movement for fixing, and further, a second template (25) is further disposed on an outer wall surface of the temperature control plate (22), and the second template (25) corresponds to the first One a template (17), and an outer surface of the second template (25) is provided with a concave-convex structure corresponding to the optical texture to be printed, and the second template (25) is permeable to the second thermal insulation layer (23) The movement is adjusted to the distance between the first template (17), so that one of the different thicknesses of the sheet material (90) can be selectively embossed in the production operation.

The vacuum control line (30) is correspondingly disposed on the first mold (10) and communicates with the mold cavity (14), but may also be disposed in the second mold (20 in other deformation embodiments). Above and communicating with the cavity, and performing vacuuming/vacuum breaking operation by pumping/suctioning the vacuum control line (30) to selectively select the first mold (10) and the first The two molds (20) are correspondingly fixed or separated.

Please further cooperate with reference to the fourth figure, the pressure forming method of the pressure forming mold of the present invention may comprise the following steps: A. placing the step to be stamped; B. clamping step; C. heating and softening Step of imprinting the sheet; D. step of stepping up; E. step of hardening and hardening the sheet to be imprinted; F. step of stepping down; step of step C.

The A. placing the plate to be embossed is to adjust the position of the second insulating layer (23) corresponding to the second main casing (21), thereby making the first template (17) and the second The template (25) is clamped to the first mold (10) and the second mold (20) corresponding to a sheet (90) to be embossed, and the sheet (90) to be embossed is placed in the template. Inside the cavity (14), and then driving the first mold (10) and the second mold (20) abutting each other to engage each other, thereby fixing the plate to be embossed (90).

The above B. clamping step is to extract the air inside the cavity (14) by vacuuming the vacuum control line (30) to make the first mold (10) and The second mold (20) is bonded and fixed by the vacuum attraction.

The foregoing step of heating and softening the plate to be embossed is to first pre-fill the hydraulic tank (13) with a liquid for pressing (for example, oil), and pass the temperature control in the temperature control coil (16). The liquid inlet end (161) injects a high temperature liquid (for example, water, oil or a mixture thereof) and then heats the hydraulic pressure tank (13) by the temperature control coil (16) and simultaneously injects from the liquid injection tube (222). a high temperature liquid (for example: water, oil or a mixture thereof) to the temperature control flow path (221) to warm the temperature control plate (22), and by the hydraulic pressure tank (13) and the temperature control plate (22) The high temperature gradually softens the surface of the sheet (90) to be embossed.

The foregoing D. step-up step is: injecting the pressing liquid through the liquid inlet pipe (131) in the hydraulic pressure tank (13), thereby increasing the pressure in the hydraulic pressure tank (13), and then pressing the first The template (17) is evenly pressed by the force applied to the plate to be embossed (90), and is coerced to the second template (25), and further to the two plates (90) to be embossed. The corresponding optical texture is transferred on the side surface.

The step of E. cooling hardening to be embossed is to discharge the internal high temperature liquid through the temperature control liquid discharge end (162) in the temperature control coil (16), and simultaneously pass through the temperature control liquid inlet end (161). Injecting a liquid lower than normal temperature, and then lowering the temperature of the hydraulic pressure tank (13) by the temperature control coil (16), and simultaneously passing through the liquid discharge tube (223) discharging the high temperature liquid in the temperature control flow path (221), and further injecting the liquid lower than the normal temperature through the liquid injection pipe (222) to lower the temperature of the temperature control plate (22), and then passing through the cooling The hydraulic groove (13) and the temperature control plate (22) cool the surface of the plate to be embossed (90) to gradually harden due to a decrease in temperature.

In the above-mentioned F. step-down step, the pressure-receiving liquid is discharged through the drain line (132) in the hydraulic tank (13), thereby reducing the pressure of the hydraulic tank (13).

The G. mold opening step is to inject air into the cavity (14) through the vacuum control line (30), thereby breaking the vacuum state in the cavity (14), and then the first mold (10). And separating the second mold (20), and taking out the transferred plate to be embossed (90).

In the implementation of the pressure-shaping mold and the pressure-shaping forming method thereof, the hot liquid is used as a heat source, and the elastic heat conductive film (12) is used as a medium, so that uniform heat transfer can be achieved, and the object to be embossed can be 90) The surface is uniformly softened by heat, and because the high-pressure liquid is used as the pressure source, it is pressed by the force of the uniform directionality of the liquid, so that the points on the embossed material are uniformly pressed without uneven force. The printing yield is disturbed, and since the high-pressure liquid is used as the pressure source, the size of the embossed material (90) is not limited, and the efficiency of the production operation can be effectively improved, and the gain can be seen.

The embodiments described above are merely illustrative of the technical spirit and the features of the present invention, and the objects of the present invention can be understood by those skilled in the art, and the scope of the present invention cannot be limited thereto. That is, the equivalent changes or modifications made by the spirit of the present invention should still be covered by the present invention. Within the scope of the patent.

Looking at the above, it can be seen that the present invention breaks through the prior art first, and has indeed achieved the desired effect, and is also unfamiliar to those skilled in the art, and its progress and practicability have been consistent with patents. The application requirements, 提出 file a patent application according to law, and ask your bureau to approve the application for this invention patent, in order to invent invention, to the sense of virtue.

(10)‧‧‧First mould

(11)‧‧‧First main shell

(12)‧‧‧Elastic thermal mode

(13)‧‧‧Hydraulic trough

(131)‧‧‧Inlet line

(132)‧‧‧Draining line

(14) ‧‧‧ cavity

(15) ‧‧‧First insulation

(16) ‧‧‧temperature control coil

(161) ‧‧‧temperature-controlled liquid inlet

(162) ‧‧‧ Temperature-controlled liquid outlet

(17) ‧‧‧ first template

(20)‧‧‧Second mold

(21)‧‧‧Second main shell

(22) ‧‧‧temperature control board

(221) ‧‧‧temperature-controlled runners

(222)‧‧‧Injection tube

(223)‧‧‧Draining tube

(23) ‧‧‧Second insulation

(24) ‧‧‧Fixed devices

(25) ‧‧‧Second template

(30)‧‧‧ Vacuum control line

(90) ‧ ‧ embossed plates

Claims (9)

A pressure forming mold comprising: a first mold having a first main shell, wherein the first main shell is recessed into a first chamber on a working surface side, and the first chamber is self-contained An elastic heat conducting mold is disposed across the opening, and the elastic heat conducting mold divides the first chamber into a hydraulic groove and a cavity, and wherein the wall surface of the hydraulic groove is connected to one of the first main casing a liquid inlet pipe and a drain line, wherein a temperature control coil is arranged in the hydraulic tank, the temperature control coil has a temperature control liquid inlet end and a temperature control liquid outlet end, the temperature control liquid inlet end and The temperature control liquid discharge end extends through the first main shell, and further, a first template is further disposed on an outer wall surface of the elastic heat conductive film, and the first template has an optical corresponding to the print on an outer side surface thereof. a textured structure; a second mold corresponding to the first mold and combinable with the first mold to form a complete mold, the second mold comprising a second main housing, and the second main housing thereon a working chamber side recessed into a second chamber, wherein the second chamber is provided with a temperature control plate, and Further, a temperature control flow channel is further disposed in the temperature plate, and a liquid injection pipe and a liquid discharge pipe are respectively connected to the two ends of the temperature control flow channel, and the liquid injection pipe and the liquid discharge pipe extend out of the second main casing. In addition, a second template is further disposed on an outer wall surface of the temperature control plate, and the second template corresponds to the first template, and an outer surface of the second template is provided with an uneven surface corresponding to the optical grain to be printed. a structure; and at least one vacuum control line corresponding to the cavity to evacuate or vacuum the cavity when the first die is engaged with the second die; The second heat insulating layer is further disposed between the temperature control plate and the second main casing as a thermal insulation measure with the second main casing, and wherein the second thermal insulation layer selectively corresponds to the second The inside of the main casing moves toward the outside or inside. The pressure-molding mold according to claim 1, wherein the second insulation layer selectively restricts movement on the second main casing through a fixing device as a means for corresponding fixing. The pressure forming mold according to claim 1, wherein the first main shell and the second main shell are made of metal. The pressure forming mold according to claim 1, wherein a first heat insulating layer is further disposed between the hydraulic tank and the first main shell. The pressure forming mold of claim 1, wherein the vacuum control line is disposed on the first mold or the second mold. The pressure forming mold according to claim 1, wherein the temperature control plate is made of metal. A method for pressure forming of a pressure forming mold according to claim 1 of the patent application, comprising: A. inserting a sheet to be stamped, which is to position the second insulating layer corresponding to the second main shell Adjusting, so that the first template and the second template are aligned with the first mold and the second mold, and then corresponding to a plate to be embossed, and the plate to be embossed is placed in the cavity. And driving the first mold and the second mold to abut each other to be joined to each other to fix the plate to be embossed; B. a clamping step of extracting the air inside the cavity from the vacuum control line Putting it into a vacuum state, and then bonding the first mold to the second mold; C. The step of warming and softening the plate to be embossed is to first pre-fill the hydraulic tank with the liquid for pressing, and in the temperature control coil, inject the high temperature liquid through the temperature control inlet, and then use the temperature control The coil heats the hydraulic tank, and at the same time, injects a high temperature liquid from the liquid injection pipe to the temperature control flow path to warm the temperature control plate, and the temperature to be embossed by the high temperature of the hydraulic pressure tank and the temperature control plate The surface of the sheet is softened; D. a step of pressurizing, in the hydraulic tank, injecting a liquid for pressing through the liquid inlet line, thereby increasing the pressure in the hydraulic tank, and then pressing the first template to make it uniform The ground is pressed against the plate to be embossed, and is pressed to the second template in combination, thereby embossing the corresponding optical grain on the plate to be embossed; E. step of hardening the plate to be embossed, The liquid is discharged from the temperature control liquid discharge end through the temperature control liquid discharge end, and the liquid lower than the normal temperature is injected through the temperature control liquid inlet end to lower the temperature of the hydraulic pressure tank, and also through the The liquid discharge pipe discharges the high temperature liquid in the temperature control flow channel, and enters a Injecting a liquid lower than normal temperature to lower the temperature of the temperature control plate, and then cooling the plate to be embossed through the cooled hydraulic tank and the temperature control plate to harden due to temperature decrease; F. step-down step The pressure in the hydraulic tank is discharged through the drain line to reduce the pressure of the hydraulic tank; and G. the mold opening step is to inject into the cavity through the vacuum control line. The air, thereby breaking the vacuum state in the cavity, separates the first mold and the second mold, and takes out the transferred plate to be embossed. The method for forming a pressure equalizing mold according to claim 7, wherein the liquid for pressing in the hydraulic tank is oil. The method for forming a pressure equalizing mold according to claim 7, wherein the liquid injected into the temperature control coil and the temperature control flow channel is water, oil or a mixture thereof.