JP2019072862A - Module structure of optical sheet injection molding - Google Patents

Abstract

To provide a module structure of optical sheet injection molding solving defects in the conventional module structure of optical sheet injection molding.SOLUTION: Provided is a module structure of optical sheet injection molding being the one of subjecting an optical sheet to injection molding, comprising upper and lower both die bases. Both the die bases all include: first surfaces; second surfaces; first sides; and second sides, and a die cavity is recessedly provided on the first surface of the at least one die base toward the direction of the second surface. Further, since a cooling space is beforehand made at a position in which the die base is tightly fitted to the die cavity and the cooling space is suitably separated from the bottom part of the die hole, it is not passed through the die hole. At least one coolant introduction passage and at least one coolant derivation passage are linked and conducted, respectively, to both the sides of the cooling space.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a module structure for optical sheet injection molding, and more particularly to a module structure for optical sheet injection molding in which mold holes are rapidly cooled.

  Most of the modular structures (molds) 30 for injection molding conventional optical sheets at present have upper and lower mold bases 31 (shown in FIGS. 9 and 10). When the mold cavity 32 is provided inside the at least one mold base 31 and the above-mentioned both mold bases 31 are put together, the plastic material is heated and melted by the injection molding machine and then poured into the above-mentioned module structure 30 As the plastic material fills the mold cavity 32 of the modular structure 30, the optical sheet described above is manufactured smoothly by injection molding. Also, in order to pour the plastic material more smoothly into the above-mentioned mold hole 32, when the module structure 30 is molded, an operation of raising the temperature is performed, and the entire module structure 30 is heated to 120 degrees Celsius and 180 degrees Celsius. Heat up to. However, at the time of mold opening, it is necessary to lower the mold hole 32 from the 180 ° C. after the temperature rise to the first 120 ° C. in order to take out the molded optical sheet immediately. By providing the passage of the coolant by means of the cooling pipe 33 installed opposite to the outside of the module 32, the operation of lowering the temperature can be completed smoothly.

  However, the conventional structure as described above has the following problems in practical application. That is, since the coolant only passes along the cooling pipe 33 outside the above-mentioned mold hole 32 and does not flow to the position opposite to the above-mentioned mold hole 32, the temperature of the entire mold base 31 is cooled when cooling. It is not designed to lower the temperature only for the mold hole 32 described above. Therefore, a relatively long waiting time is required to complete the temperature lowering, which is inefficient in production and raises production costs.

  Therefore, in order to ameliorate the drawbacks in the prior art, the inventor of the present invention has made a will to create, designed with many years of experience, made a prototype while pursuing in many fields, and made a lot of corrections and improvements. I got an invention.

  The problem to be solved by the present invention is to solve the above-mentioned drawbacks in the prior art that the conventional optical sheet injection molding module structure can not cool down only to the mold cavity, and to provide an optical sheet injection molding module structure.

  The module structure of the optical sheet injection molding of the present invention is a module structure for injection molding an optical sheet, and includes upper and lower mold bases. Both mold bases described above have a first surface, a second surface, a first side, and a second side, and on the first surface of at least one mold base in the direction of the second surface described above The mold hole is recessed toward the end. Once the modular structure has been mated and the first surfaces of both mold bases have been mated, the mold cavity described above is closed. The plastic material is heated and melted by the injection molding machine and then poured into the above-described module structure, and the above-mentioned optical sheet is smoothly manufactured by injection molding when the plastic material fills the mold holes of the module structure. Also, a cooling space is opened in advance at a position where the mold base is closely fitted to the above-described mold cavity, and the cooling space does not penetrate the above-mentioned mold cavity because it is separated from the bottom of the above-mentioned mold cavity. At least one cooling lead-in path and at least one cooling lead-out path are connected in series on both sides of the above-mentioned cooling space. This constitutes a module structure of optical sheet injection molding.

  The cooling space in the modular structure of the optical sheet injection molding of the present invention is installed in the mold base described above, and in order to closely fit or approach the above-described mold cavity, the cooling space only cools the above-mentioned mold cavity during cooling. It is avoided that the temperature lowering and excessive temperature lowering ability act on the non-mold hole position of the mold base and the relatively long waiting time is required to complete the temperature lowering operation. The design, which can cool down quickly, can reduce the time taken for each process, make the production more efficient, and effectively reduce the cost of production.

FIG. 1 is a perspective view of a first embodiment showing a module structure of injection molding of an optical sheet according to the present invention in a mold-aligned state. FIG. 2 is a three-dimensional view of a first embodiment showing a module structure of optical sheet injection molding according to the present invention in the mold open state. FIG. 3 is a plan view of a first embodiment showing a module structure of optical sheet injection molding according to the present invention. FIG. 4 is a cross-sectional view taken along line AA of FIG. 3 of the present invention. FIG. 5 is a second embodiment view showing a module structure of optical sheet injection molding according to the present invention. FIG. 6 is a third embodiment view showing a module structure of optical sheet injection molding according to the present invention. FIG. 7 is a fourth embodiment view showing a module structure of optical sheet injection molding according to the present invention. FIG. 8 is a fifth embodiment view showing a module structure of optical sheet injection molding according to the present invention. FIG. 9 is a plan view of the conventional structure. FIG. 10 is a cross-sectional view of a conventional structure.

  First, refer to FIG. 1 to FIG. The modular structure of the optical sheet injection molding of the present invention is a modular structure (mold) 10 for injection molding an optical sheet, and includes upper and lower mold bases 11. Both mold bases 11 described above have a first surface 12, a second surface 13, a first side 14 and a second side 15 all on the first surface 12 of at least one mold base 11. The mold cavity 16 is recessed toward the second surface 13 of the When the modular structure 10 is die-fit and the first surfaces 12 of both mold bases 11 are brought together, the above-mentioned die holes 16 are closed. The plastic raw material is heated and melted by the injection molding machine and then poured into the above-described module structure 10, and when the plastic raw material fills the mold cavity 16 of the modular structure 10, the above-mentioned optical sheet is smoothly manufactured by injection molding. Be done. In addition, the cooling space 17 is previously opened at a position where the mold base 11 is fitted to the above-mentioned mold hole 16 properly, and the cooling space 17 is separated from the bottom of the above-mentioned mold hole 16 appropriately. At least one coolant inlet passage 18 and at least one coolant outlet passage 19 are respectively connected to both sides of the cooling space 17.

  The present invention provides a modular structure for optical sheet injection molding, in which the coolant inlet passage 18 and the coolant outlet passage 19 respectively penetrate the first side 14 and the second side 15 of the mold base 11 described above, Also, the first side 14 and the second side 15 are kept opposite to each other (see also FIGS. 1 to 4 at the same time).

  The present invention provides a modular structure for optical sheet injection molding, in which the coolant inlet passage 18 and the coolant outlet passage 19 simultaneously penetrate the first side 14 of the mold base 11 (see also FIG. 5 simultaneously) I want to be

  The present invention provides a modular structure for optical sheet injection molding, in which the coolant inlet passage 18 and the coolant outlet passage 19 simultaneously pass through the second side 15 of the mold base 11 described above.

The present invention provides a modular structure for optical sheet injection molding, among which:
The coolant introduction passage 18 and the coolant lead-out passage 19 respectively penetrate the first side 14 and the second side 15 of the mold base 11 described above, and the first side 14 and the second side 15 are separated at an appropriate angle. (See also FIG. 6 at the same time).

  The present invention provides a modular structure for optical sheet injection molding, in which the cooling space 17 described above is a bath chamber and is installed inside the mold base 11 described above. It is also located between the bottom of the mold cavity 16 and the second surface 13, but does not penetrate the mold cavity 16 and the second surface 13 described above (see also FIGS. 1 to 4 simultaneously).

  The present invention provides a modular construction of optical sheet injection molding, in which the cooling space 17 described above is a ring-shaped groove, which is installed inside the mold base 11 described above. It is also located between the bottom of the mold cavity 16 and the second surface 13 but does not penetrate the mold cavity 16 and the second surface 13 described above.

  The present invention provides a modular structure for optical sheet injection molding, in which the cooling space 17 described above is installed in the second surface 13 of the mold base 11 described above and exhibits a cup-like form (see also FIG. 7) I want to

  The present invention provides a modular structure for optical sheet injection molding, in which a mold cavity 16 is provided inside the mold base 11 of one side described above, and the other mold base 11 faces the mold cavity 16. The mold core is protruded.

The present invention provides a modular structure for optical sheet injection molding, among which:
The mold holes 16 are provided in the inside of both the mold bases 11 described above.

The present invention provides a modular structure for optical sheet injection molding, among which:
The above-mentioned coolant introduction path 18, cooling space 17 and coolant lead-out path 19 are provided to circulate the liquid coolant.

The present invention provides a modular structure for optical sheet injection molding, among which:
The above-mentioned coolant introduction path 18, cooling space 17 and coolant lead-out path 19 are provided to circulate the gaseous coolant.

  In actual use, in order to pour plastic raw materials into mold holes 16 more smoothly, when the module structure 10 is molded, an operation of raising the temperature is performed, and the entire module structure 10 is heated to 120 degrees Celsius Heat to 180 degrees. However, at the time of mold opening, it is necessary to lower the mold hole 16 to the initial temperature of 120 degrees C. again from 180 degrees C. after the temperature rise so that the molded optical sheet can be taken out immediately. The cooling operation utilizes the introduction of the coolant from the coolant introduction passage 18, and after the coolant passes through the cooling space 17, it flows out from the coolant lead-out passage 19 and is completed. Further, the cooling space 17 is installed in the mold base 11 described above, and the temperature is lowered only to the mold cavity 16 by the cooling space 17 during cooling in order to closely fit or appropriately approach the mold cavity 16 described above. It is avoided that the extra temperature-cooling ability acts on the non-mold hole 16 position of the mold base 11 and the relatively long waiting time is required to complete the temperature-cooling operation. The design, which can cool down quickly, can reduce the time taken for each process, make the production more efficient, and effectively reduce the cost of production.

  Continuing to refer to FIG. Although the above-mentioned cooling space 17 can cool the mold hole 16 quickly by using the introduction of the coolant, the cooling rate is still affected by the local temperature, so a slight drop occurs. If the temperature detection bar 20 connected to the controller (computer) is installed on the above-mentioned mold base 11 in order to reliably grasp the time required for each process, the temperature detection bar 20 will continue to be the above-mentioned type The actual temperature of the holes 16 can be collected, and the controller (computer) can fine-tune each mold opening and setting as it is performed, and the cooling rate can be grasped more accurately and also in data analysis.

The above is only a part of the embodiments according to the present invention, and therefore, the scope of the present invention is not limited. That is, changes, modifications, etc., which are made within the scope of the present invention should also fall within the scope of the present invention.

DESCRIPTION OF REFERENCE NUMERALS 10 modular structure 11 mold base 12 first surface 13 second surface 14 second side 15 second side 16 mold hole 17 cooling space 18 coolant introduction path 19 coolant lead-out path 20 temperature detection bar 30 module structure 31 mold base 32 mold hole 33 cooling pipe

Claims (10)

Optical sheet injection molding module structure,
The module structure for injection molding an optical sheet includes upper and lower mold bases, and both mold bases all have a first surface, a second surface, a first side, and a second side. When the mold hole is recessed in the first surface of the at least one mold base in the direction of the second surface, the module structure is mold-matched, and the first surfaces of both mold bases are mated, After the mold cavity is closed and the plastic material is heated and melted by the injection molding machine, it is poured into the module structure, and when the plastic material fills the mold cavity of the module structure, the optical sheet smoothly by injection molding Since the cooling space is made in advance at a position where the mold base is manufactured and the mold base is closely fitted to the mold hole, the cooling space is separated from the bottom of the mold hole appropriately, so the mold hole is not penetrated. Modular structure of the optical sheets injection molding at least one coolant outlet passage and at least one coolant introduction path on both sides is characterized in that it is articulated conducting space.   The coolant introduction path and the coolant lead-out path respectively penetrate the first side and the second side of the mold base, and the first side and the second side are kept to be opposed to each other. The module structure of optical sheet injection molding according to claim 1.   The optical sheet injection molding module structure according to claim 1, wherein the coolant introduction path and the coolant lead-out path simultaneously penetrate the first side or the second side of the mold base.   The cooling space is a bath chamber, is installed inside the mold base, and is located between the bottom of the mold hole and the second surface, but does not penetrate the mold hole and the second surface. The module structure of optical sheet injection molding according to claim 1, characterized in that   The cooling space is a ring-shaped groove and is installed inside the mold base and located between the bottom of the mold and the second surface, but does not penetrate the mold and the second surface. The module structure of optical sheet injection molding according to claim 1, characterized by:   The module structure of optical sheet injection molding according to claim 1, wherein the cooling space is installed on the second surface of the mold base and has a cup-like form.   The optical sheet injection molding according to claim 1, characterized in that a mold hole is provided inside one of the mold bases, and the mold core of the other mold base is protruded relative to the mold holes. Module structure.   The optical sheet injection molding module structure according to claim 1, characterized in that mold holes are provided in the inside of both the mold bases.   The optical sheet injection molding module structure according to claim 1, wherein the coolant introduction path, the cooling space, and the coolant lead-out path are provided to circulate a liquid or gas coolant.   The optical sheet injection molding module structure according to claim 1, wherein a temperature detection bar is attached to the mold base.