CN210336703U - Light guide plate injection mold with through hole structure - Google Patents
Light guide plate injection mold with through hole structure Download PDFInfo
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- CN210336703U CN210336703U CN201920756878.6U CN201920756878U CN210336703U CN 210336703 U CN210336703 U CN 210336703U CN 201920756878 U CN201920756878 U CN 201920756878U CN 210336703 U CN210336703 U CN 210336703U
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- guide plate
- light guide
- injection
- mould benevolence
- injection molding
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Abstract
The utility model discloses a light guide plate injection mold with through-hole structure, this injection mold include front mould benevolence and back mould benevolence, are formed with the chamber of moulding plastics that is used for light guide plate injection moulding between this front mould benevolence and the back mould benevolence, and the chamber of should moulding plastics is connected with the injecting glue passageway, and the injecting glue passageway is for advancing jiao kou with the junction in chamber of moulding plastics. The rear mold core comprises a light source sawtooth structure mold core, and one side edge of the injection molding cavity is of a sawtooth structure. The through hole ring strut is arranged in the injection molding cavity and is close to a vertex angle edge of the other side edge of the opposite sawtooth structure; the glue inlet wraps the edge of the vertex angle and keeps a distance with the sawtooth structure. The utility model discloses novel structure will advance gluey mouthful parcel and live a apex angle edge that the intracavity is close to through-hole ring pillar of moulding plastics, can change the colloid in the flow direction of through-hole structure department to properly prolong the weld line of light guide plate, and then increased the intensity of light guide plate, improved the yield and the machining efficiency of light guide plate.
Description
Technical Field
The utility model relates to a light guide plate injection mold technical field, concretely relates to light guide plate injection mold with through-hole structure.
Background
Along with liquid crystal display device's rapid development, in order to satisfy everybody to the aesthetic demand of high screen occupation of percentage, no frame, provided the backlight unit who establishes special-shaped structures such as through-hole, bang screen, beauty tip, water droplet type, reduce the frame width, increase screen occupation of percentage. The existing light guide plate with the special-shaped structure is formed by processing a light guide plate injection mold with the special-shaped structure firstly and then injecting a plastic body on the light guide plate injection mold with the corresponding structure to form the light guide plate with the special-shaped structure.
When the light guide plate with the through hole structure is produced and processed, if a tail glue inlet mode is selected, due to the existence of the glue inlet and the through hole structure, glue bodies of different flow paths can form a thermal stress cross-connecting line near the through hole structure due to temperature difference in the injection molding process of the light guide plate, so that a welding line is formed, and a long white bright line appears in the display of the backlight module, and the visual effect is influenced. If the side glue feeding mode is selected, namely, a glue inlet is arranged from the long side of the mold, the influence of the welding line can be reduced. However, the existing light guide plate injection mold usually adopts a triangle-like glue inlet, as shown in fig. 1, glue bodies in different flow paths form a weld line at the rear side of the through hole according to the flow direction of the glue bodies and the positions of the through holes, and the weld line is short and is easy to crack at the position of the weld line during polishing of the light guide plate, so that the yield of the light guide plate is affected, and the production cost is increased, as shown in fig. 2.
If the light guide plate without the through hole structure is formed by injection molding, the through hole structure is not easy to process when the water gap is cut subsequently, and the generated dust, foreign matter and the like can influence the optical effect and reduce the processing efficiency.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a weak point to prior art provides a light guide plate injection mold with through-hole structure, advances the structure of jiao kou through changing to change the colloid in the flow direction of moulding plastics chamber through-hole structure department, make the weld line of light guide plate obtain the extension, thereby increased the intensity of light guide plate, improved the yield of light guide plate.
The utility model provides a pair of light guide plate injection mold with through-hole structure, including front mould benevolence, back mould benevolence and through-hole ring pillar, be formed with the chamber of moulding plastics that is used for light guide plate injection moulding between front mould benevolence and the back mould benevolence, the chamber of moulding plastics is connected with the injecting glue passageway, the injecting glue passageway is for advancing jiao kou with the junction in chamber of moulding plastics, wherein:
the rear mold core comprises a light source sawtooth structure mold core, and one side edge of the injection molding cavity is of a sawtooth structure;
the through hole ring strut is arranged in the injection molding cavity and is close to a vertex angle edge of the other side edge of the opposite sawtooth structure;
the glue inlet wraps the edge of the vertex angle and keeps a distance with the sawtooth structure.
Advance a jiao kou parcel and live a apex angle edge that the intracavity is close to through-hole ring pillar of moulding plastics, can change the colloid in the flow direction of through-hole structure department, properly prolonged the length of weld line to increased the intensity of light guide plate, prevented the fracture, improved the yield and the machining efficiency of light guide plate. In addition, because the other side edge of the injection molding cavity is of a sawtooth structure, the glue inlet and the sawtooth structure of the injection molding cavity are kept at a certain interval, so that the sawtooth structure of the light guide plate is convenient to form.
Further, the distance is 8-30 mm.
Further, the glue inlet is of a rectangular structure.
The glue inlet is set to be a regular rectangular structure, so that the production and the manufacture of the light guide plate are facilitated, and the operation is facilitated.
Further, the glue inlet is tangent to the edge of the vertex angle.
Furthermore, the number of the injection molding cavities is two, and the two injection molding cavities are arranged in a transverse mode; the glue injection channel is arranged between the two injection molding cavities.
The injection molding cavities are arranged in a transverse arrangement mode, so that the injection molding length of the light guide plate is effectively shortened, and the problem of difficulty in injection molding due to the overlong light guide plate is solved.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model provides a pair of light guide plate injection mold with through-hole structure will advance a jiao kou parcel and live a apex angle edge that the intracavity is close to through-hole ring pillar of moulding plastics, can change the flow direction of colloid in through-hole structure department to prolonged the weld line length of light guide plate, and then increased the intensity of light guide plate, prevented the fracture, and then improved the yield and the machining efficiency of light guide plate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only one embodiment of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.
FIG. 1 is a schematic structural diagram of a glue injection channel in a conventional light guide plate injection mold;
FIG. 2 is a schematic structural diagram of a light guide plate and a weld line thereof injected by a conventional light guide plate injection mold;
fig. 3 is a schematic structural view of an injection mold for a light guide plate according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a glue injection channel in an injection mold for a light guide plate according to an embodiment of the present invention;
fig. 5 is a schematic structural view of the light guide plate and the weld line thereof injected by the light guide plate injection mold according to the embodiment of the present invention.
Wherein the reference numerals are:
the lower part is provided with a V-cut groove mold core 11, a left fixed mold 21, a right fixed mold 22, a tail mold core 23, a glue injection channel mold core 24, a glue inlet 241, a light source sawtooth structure mold core 25, a through hole ring support column 26, a light guide plate 3, a sawtooth structure 31, a through hole structure 32 and a welding line 33.
Detailed Description
For a better understanding and an implementation, the following detailed description of the embodiments of the present invention is given in conjunction with the accompanying drawings and examples. The following examples are merely illustrative of the present invention and are not intended to limit the scope of the present invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 3, the utility model provides a light guide plate injection mold with through-hole structure, including front mold core, back mold core and through-hole ring pillar 26, be formed with the injection molding chamber that is used for light guide plate 3 injection molding between front mold core and the back mold core, in this embodiment, this front mold core includes relative setting's upper setting net point mold core (not shown in the figure) and lower setting V-cut groove mold core 11, back mold core includes relative setting's left side fixed mold 21 and right side fixed mold 22, relative setting's afterbody mold core 23 and light source sawtooth structure mold core 25, and set up injecting glue passageway mold core 24 between left side fixed mold 21 and right side fixed mold 22; two injection molding cavities which are transversely arranged are formed between the front mold core and the rear mold core, the injection molding cavities are of a rectangular structure, namely the light guide plate 3 is rectangular and comprises six surfaces, wherein the upper mesh point mold core and the lower V-cut groove mold core 11 are used for forming the top surface and the bottom surface of the light guide plate 3, the glue injection channel mold core 24 and the left fixed mold 21/the right fixed mold 22 are used for forming the side surfaces of two long side edges of the light guide plate 3, and the tail mold core 23 and the light source sawtooth structure mold core 25 are used for forming the side surfaces of two short side edges of the light guide plate 3. The through hole ring support 26 is disposed in the injection molding cavity and is close to a vertex angle edge of one side of the rear mold core 23. The through-hole ring support 26 is used to form a through-hole structure 32 of the light guide plate 3.
Referring to fig. 4, a glue injection channel is disposed in the glue injection channel mold core 24, the glue injection channel is communicated with the injection molding cavity, a glue inlet 241 is disposed at a connection position of the glue injection channel and the injection molding cavity, in this embodiment, the glue inlet 241 is rectangular, and wraps an edge of a vertex angle close to the through hole ring pillar 26, and the other end of the glue inlet is spaced from the sawtooth structure 31 on the injection molding cavity. In this embodiment, the pitch is 20 mm.
Referring to fig. 5, the light guide plate 3 injected by the injection mold is rectangular, the top surface is provided with a dot structure, the bottom surface is provided with a V-cut groove structure, one short side of the light guide plate is a sawtooth structure 31, and a through hole structure 32 is arranged at the other side of the light guide plate 3 opposite to the sawtooth structure 31 and close to the edge of a vertex angle of the glue injection channel. The weld lines 33 of the light guide plate 3 are offset laterally, thereby extending the length of the weld lines 33.
To sum up, the utility model provides a pair of light guide plate injection mold with through-hole structure will advance a apex angle edge that jiao kou 241 parcel was close to through-hole ring pillar 26 in living the injection mould cavity, can change the flow direction of colloid in through-hole structure 32 department, has suitably prolonged the weld line 33 length of light guide plate 3 to increased the intensity of light guide plate 3, prevented the fracture, improved the yield and the machining efficiency of light guide plate 3.
The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by the arbitrary combination of the above technical features. It should be noted that, for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications are also considered as the protection scope of the present invention.
Claims (5)
1. The utility model provides a light guide plate injection mold with through-hole structure, includes front mould benevolence, back mould benevolence and through-hole ring pillar (26), be formed with the chamber of moulding plastics that is used for light guide plate (3) injection moulding between front mould benevolence and the back mould benevolence, the chamber of moulding plastics is connected with the injecting glue passageway, the injecting glue passageway is for advancing jiao kou (241), its characterized in that with the junction in chamber of moulding plastics:
the rear mold core comprises a light source sawtooth structure mold core (25), and a sawtooth structure (31) is arranged on one side of the injection molding cavity;
the through hole ring strut (26) is arranged in the injection molding cavity and is close to a vertex angle edge of the other side edge of the opposite sawtooth structure (31);
the glue inlet (241) wraps the edge of the vertex angle and keeps a distance with the sawtooth structure (31).
2. The light guide plate injection mold according to claim 1, wherein the distance is 8 to 30 mm.
3. The light guide plate injection mold according to claim 2, wherein the glue inlet (241) has a rectangular structure.
4. The light guide plate injection mold of claim 3, wherein the glue inlet (241) is tangential to the one corner edge.
5. The light guide plate injection mold according to any one of claims 1 to 4, wherein the injection molding cavities are two and arranged in a transverse arrangement; the glue injection channel is arranged between the two injection molding cavities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756878.6U CN210336703U (en) | 2019-05-23 | 2019-05-23 | Light guide plate injection mold with through hole structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756878.6U CN210336703U (en) | 2019-05-23 | 2019-05-23 | Light guide plate injection mold with through hole structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210336703U true CN210336703U (en) | 2020-04-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920756878.6U Active CN210336703U (en) | 2019-05-23 | 2019-05-23 | Light guide plate injection mold with through hole structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210336703U (en) |
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2019
- 2019-05-23 CN CN201920756878.6U patent/CN210336703U/en active Active
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