Constant-temperature hot-pressing light guide plate mold

Abstract

The utility model is applicable to the technical field of light guide plate dies, and provides a constant-temperature hot-pressing light guide plate die, which comprises a base, a hot-pressing assembly and a lower die which are arranged at the top of the hot-pressing assembly, and an upper die arranged at the top of the lower die, the upper die comprises a guide plate, an upper positioning plate arranged at the bottom of the guide plate, and an upper die core arranged at the top of the upper positioning plate, the lower mold comprises a base plate, a lower positioning plate mounted at the top of the base plate, and a lower mold core mounted at the top of the lower positioning plate; and constant-temperature channels are formed in the upper mold core and the lower mold core. The device solves the problem that a hot-pressing mold cannot ensure the balance between the uniformity of temperature control and rapid demolding in the hot-pressing and cooling processes, and achieves the purpose that uniform and rapid cooling can be realized while the uniformity of hot-pressing and heating is ensured by forming a channel capable of uniformly cooling and heating in the mold core; the effects of ensuring the production quality of the light guide plate and shortening the production period are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to light guide plate mould technical field, more specifically, it relates to a constant temperature hot pressing light guide plate mould. BACKGROUND

[0002] Hot pressing light guide plate is a kind of high-tech product for liquid crystal backlight module, its main function is to convert linear light source or point light source into area light source, realizes the effect of uniform luminous. The process of light guide plate made by hot pressing process is to heat and press the light guide plate raw material (usually organic glass, polycarbonate and other high-transparency materials) under certain temperature and pressure conditions by using light guide plate mould, to form the process of specific structure and shape.

[0003] In the hot pressing process, temperature is an important factor affecting the forming effect and performance of light guide plate. If the temperature control is improper in the hot pressing process, it may cause the light guide plate to deform or scorch. After hot pressing, the light guide plate also needs to be cooled before demolding, and the uneven temperature control in the cooling process will also invisibly lengthen the cycle of light guide plate embossing forming, reduce the production efficiency of products. At the same time, uneven temperature control will also cause the light guide plate produced to be prone to warping, bubbles, wrinkles and other defects, affecting the forming quality

[0004] The existing light guide plate mould mostly controls the temperature by preheating before hot pressing and controlling the heating temperature during hot pressing. However, this method cannot guarantee the balance between uniform temperature control and rapid demolding during hot pressing and cooling, and it is difficult to shorten the production cycle while ensuring the production quality of light guide plate. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies in the prior art, the utility model aims to provide a constant temperature hot pressing light guide plate mould which can uniformly cool and heat by opening a channel in the mould core, ensure uniform heating and rapid cooling during hot pressing, and shorten the production cycle while ensuring the production quality of light guide plate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0007] A constant temperature hot pressing light guide plate mould, comprising a base, a hot pressing assembly and a lower mould installed on the top of the hot pressing assembly, and an upper mould installed on the top of the lower mould, the upper mould comprises a guide plate, an upper positioning plate installed on the bottom of the guide plate, and an upper mould core installed on the top of the upper positioning plate, the lower mould comprises a base plate, a lower positioning plate installed on the top of the base plate, and a lower mould core installed on the top of the lower positioning plate, a constant temperature channel is opened in the interior of the upper mould core and the lower mould core, the constant temperature channel comprises a water inlet penetrating through the upper mould core and the lower mould core, and a first circulation channel and a second circulation channel communicated with the water inlet respectively.

[0008] The utility model further sets up: the water inlet penetrates the four edge side walls of upper die and lower die and is provided, the water inlet is about the axial position symmetry of upper die and lower die setting.

[0009] The utility model further sets up: the first circulation channel and second circulation channel are provided with rectangular channel structure, the water inlet is along its length direction respectively with first circulation channel and second circulation channel intercommunication.

[0010] The utility model further sets up: the second circulation channel is arranged in the first circulation channel, and the first circulation channel and the second circulation channel are about the center symmetry of upper die and lower die setting.

[0011] The utility model further sets up: the first circulation channel four corners position is provided with connecting channel, and the connecting channel is away from the side of first circulation channel and is communicated with the second circulation channel corner.

[0012] Through adopting above-mentioned technical scheme, constant temperature channel is composed of first circulation channel, second circulation channel and connecting channel, and first circulation channel, second circulation channel and connecting channel are evenly distributed on the section of upper die and lower die, so that the liquid in constant temperature channel can be fully and evenly contacted with each position of upper die and lower die, thereby realizing the uniform heating and cooling of each position of upper die and lower die.

[0013] The utility model further sets up: the four corner positions of the guide plate are each provided with a group of guide columns, the guide columns are installed on the base plate, the upper positioning plate and the lower positioning plate are consistent in shape and correspond in position, and the upper die and the lower die are consistent in shape and correspond in position.

[0014] The utility model further sets up: the four corner positions of the upper positioning plate are provided with positioning columns, the four corner positions of the lower positioning plate are provided with positioning holes, the positioning columns and the positioning holes are adapt in shape and correspond in position.

[0015] The utility model further sets up: the bottom of the upper die is provided with an upper pressing cavity, the top of the lower die is provided with a lower pressing cavity, and the upper pressing cavity and the lower pressing cavity are adapt in shape and correspond in position.

[0016] The utility model further sets up: the hot pressing assembly includes mounting frame and four groups of mounting columns arranged at the bottom of the mounting frame, the top of the mounting frame is provided with hot pressing cylinder, and the mounting column is provided with lifting plate.

[0017] The utility model further sets up: the bottom of the lifting plate is connected with pressing plate, and the pressing plate is adapt in shape with the guide plate and correspond in position.

[0018] The utility model has the advantages that:

[0019] 1. The utility model discloses a constant temperature hot-pressing light guide plate mould which can inject liquid with different temperatures into the upper die and the lower die according to needs during the hot-pressing and cooling processes of the light guide plate, ensures uniform heating during the hot-pressing process and realizes uniform and rapid cooling during the cooling process, and guarantees the production quality of the light guide plate and shortens the production cycle. BRIEF DESCRIPTION OF DRAWINGS

[0020] The utility model will be further described below in combination with the drawings and examples.

[0021] Figure 1 It is the structure diagram of constant temperature hot-pressing light guide plate mould of the utility model.

[0022] Figure 2 It is the structure diagram of the upper die. Figure 1

[0023] Figure 3 It is the structure diagram of the lower die. Figure 1

[0024] Figure 4 It is the sectional view of the upper die. Figure 2

[0025] Figure 5 It is the structure diagram of the hot-pressing assembly. Figure 1 Reference signs: 1, hot-pressing assembly; 11, mounting frame; 12, mounting column; 13, hot-pressing cylinder; 14, lifting plate; 15, pressing plate; 16, connecting column;

[0026] 2, upper die; 21, guide plate; 22, guide column; 23, upper positioning plate; 24, positioning column; 25, positioning block; 26, upper die; 27, upper pressing cavity;

[0027] 3, lower die; 31, base plate; 32, jacking cylinder; 33, lower positioning plate; 34, positioning hole; 35, limiting block; 36, lower die; 37, lower pressing cavity;

[0028] 4, constant temperature channel; 41, water inlet; 42, first circulating channel; 43, second circulating channel; 44, connecting channel;

[0029] 5, base.

[0030] DETAILED DESCRIPTION

[0031] ​​​​In order to make the technical problems, technical schemes and beneficial effects to be solved by the utility model more clear, the utility model will be described in detail in combination with the drawings. The drawing is a simplified schematic diagram, and only illustrates the basic of the utility model in a schematic manner, and therefore it only shows the structure related to the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all the other embodiments obtained by the ordinary skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] Please refer to Figures 1-3 A constant-temperature hot-pressing light guide plate mold, comprising a base 5, a hot-pressing assembly 1 installed on the top of the hot-pressing assembly 1 and a lower mold 3, an upper mold 2 installed on the top of the lower mold 3 and a constant-temperature channel 4 opened in the inside of the upper mold 2 and the lower mold 3. The base 5 is arranged as a rectangular plate structure, and the base 5 is arranged horizontally. The light guide plate raw material is placed on the top of the lower mold 3, the hot-pressing assembly 1 drives the upper mold 2 to adhere to the lower mold 3, and the hot-pressing of the light guide plate raw material can be completed. In the hot-pressing process and the subsequent cooling and demolding process, different temperature liquids can be respectively passed into the constant-temperature channels 4 in the inside of the upper mold 2 and the lower mold 3 to control the temperature of hot-pressing and cooling.

[0033] Please refer to Figure 1 and Figure 3 The lower mold 3 comprises a base plate 31, a lower positioning plate 33 installed on the top of the base plate 31 and a lower mold core 36 installed on the top of the lower positioning plate 33. The base plate 31 is arranged as a rectangular plate structure, and the base plate 31 is installed on the top of the base 5. The lower positioning plate 33 is installed at the center position of the base plate 31, the lower positioning plate 33 is arranged as a rectangular structure, and two groups of lifting air cylinders 32 are symmetrically arranged on one side of the lower positioning plate 33. The two groups of lifting air cylinders 32 are respectively installed on the base plate 31, and the output ends thereof abut against the upper mold 2, so that the upper mold 2 can be lifted after the light guide plate is cooled, thereby separating the upper mold 2 from the lower mold 3 and completing the demolding of the light guide plate. Positioning holes 34 are opened at the corner positions of the lower positioning plate 33, so that the upper mold 2 and the lower mold 3 can be positioned, and the accuracy of hot-pressing positioning is ensured. Limiting blocks 35 are arranged on the side edges of the lower positioning plate 33, and after the upper mold 2 and the lower mold 3 are butted to complete the mold closing, the limiting blocks 35 can adhere to the side wall of the upper mold 2 to limit the upper mold 2 from the side wall, so that the displacement of the upper mold 2 from the lower mold 3 under stress during the hot-pressing process is avoided, and the accuracy of hot-pressing positioning is ensured.

[0034] Please refer to Figure 1 and Figure 3The lower die core 36 is arranged as a rectangular plate structure and is installed at the top center of the lower positioning plate 33. A lower pressing cavity 37 is formed at the top of the lower die core 36, and the light guide plate raw material can be placed in the lower pressing cavity 37 before hot pressing. A plurality of dots are arranged in the lower pressing cavity 37, which facilitates the formation of corresponding dots on the light guide plate raw material during hot pressing.

[0035] Please refer to Figures 1-2 The upper die 2 comprises a guide plate 21, an upper positioning plate 23 installed at the bottom of the guide plate 21, and an upper die core 26 installed at the top of the upper positioning plate 23. The guide plate 21 is arranged as a rectangular structure that is adapted to the shape of the base plate 31 and is installed at the top of the base plate 31 in a position corresponding to the base plate 31. A set of guide columns 22 is arranged at each corner of the guide plate 21, and the guide columns 22 are installed on the base plate 31. The guide plate 21 can slide along the direction of the guide columns 22, thereby realizing the relative approach or separation of the upper die 2 and the lower die 3. The upper positioning plate 23 is installed at the bottom center of the guide plate 21 and is arranged as a rectangular structure. The upper positioning plate 23 is consistent in shape with the lower positioning plate 33 and corresponds in position to the lower positioning plate 33. After the upper die 2 and the lower die 3 are closed, the upper positioning plate 23 and the lower positioning plate 33 are in close contact with each other. The upper positioning plate 23 is provided with positioning columns 24 at the corners, and the positioning columns 24 and the positioning holes 34 are adapted in shape and correspond in position. During the closing process of the upper die 2 and the lower die 3, the positioning columns 24 can be inserted into the positioning holes 34, which facilitates the positioning between the upper die 2 and the lower die 3 and ensures the accuracy of hot pressing positioning. The upper positioning plate 23 is provided with positioning blocks 25 at the sides. After the upper die 2 and the lower die 3 are closed by abutting, the positioning blocks 25 can be in close contact with the side wall of the lower die 3, thereby limiting the lower die 3 from the side wall, avoiding displacement of the upper die 2 and the lower die 3 due to stress during hot pressing, and ensuring the accuracy of hot pressing positioning.

[0036] Please refer to Figures 1-2 The upper die core 26 is arranged as a rectangular plate structure and is installed at the top center of the upper positioning plate 23. The upper die core 26 and the lower die core 36 are consistent in shape and correspond in position. After the upper die 2 and the lower die 3 are closed, the upper die core 26 and the lower die core 36 are in close contact with each other. The upper die 2 is provided with an upper pressing cavity 27 at the bottom of the upper die core 26. A plurality of dots are arranged in the upper pressing cavity 27, which facilitates the formation of corresponding dots on the light guide plate raw material during hot pressing. The upper pressing cavity 27 and the lower pressing cavity 37 are adapted in shape and correspond in position. After the upper die 2 and the lower die 3 are closed, the upper pressing cavity 27 and the lower pressing cavity 37 are in close contact with each other, and the cavity formed between the upper pressing cavity 27 and the lower pressing cavity 37 is the cavity for hot pressing of the light guide plate raw material.

[0037] Please refer to Figures 2-4The upper die core 26 and the lower die core 36 are internally provided with constant temperature channels 4, the constant temperature channels 4 include water inlets 41 penetrating through the upper die core 26 and the lower die core 36 and first circulation channels 42 and second circulation channels 43 respectively communicating with the water inlets 41. The water inlets 41 penetrate through the four side walls of the upper die core 26 and the lower die core 36, the water inlets 41 are symmetrically arranged about the axis of the upper die core 26 and the lower die core 36, and different temperature liquids can be introduced into the upper die core 26 and the lower die core 36 through the water inlets 41, so as to facilitate temperature control during hot pressing and cooling. The first circulation channels 42 and the second circulation channels 43 are arranged in a rectangular channel structure, the second circulation channels 43 are arranged inside the first circulation channels 42, and the shapes of the second circulation channels 43 and the first circulation channels 42 are adapted to the shapes of the upper die core 26 and the lower die core 36. The first circulation channels 42 and the second circulation channels 43 are symmetrically arranged about the center of the upper die core 26 and the lower die core 36, and the water inlets 41 respectively communicate with the first circulation channels 42 and the second circulation channels 43 along the length direction thereof. The first circulation channels 42 are provided with connecting channels 44 at the four corners, and the connecting channels 44 are arranged along the diagonal direction of the first circulation channels 42. The connecting channels 44 communicate with the corners of the second circulation channels 43 away from the first circulation channels 42, and the communication between the first circulation channels 42 and the second circulation channels 43 is realized through the connecting channels 44.

[0038] Specifically, by arranging the constant temperature channels 4 inside the upper die core 26 and the lower die core 36, different temperature liquids can be introduced into the upper die core 26 and the lower die core 36 as needed during hot pressing and cooling of the light guide plate, so as to ensure uniform heating during hot pressing and uniform and rapid cooling during cooling, thereby ensuring the production quality of the light guide plate and shortening the production cycle.

[0039] The constant temperature channels 4 are composed of the first circulation channels 42, the second circulation channels 43 and the connecting channels 44, and the first circulation channels 42, the second circulation channels 43 and the connecting channels 44 are uniformly distributed on the cross sections of the upper die core 26 and the lower die core 36, so as to ensure that the liquid inside the constant temperature channels 4 can fully and uniformly contact each position of the upper die core 26 and the lower die core 36, thereby realizing uniform heating and cooling of each position of the upper die core 26 and the lower die core 36.

[0040] Please refer to Figure 1 and Figure 5The hot-pressing assembly 1 comprises a mounting frame 11 and four groups of mounting columns 12 arranged at the bottom of the mounting frame 11, the mounting columns 12 are mounted on the top of the base 5, so that the mounting frame 11 is mounted on the top of the guide plate 21. The hot-pressing cylinder 13 is arranged through the top of the mounting frame 11, the lifting plate 14 is sleeved on the four groups of mounting columns 12, the output end of the hot-pressing cylinder 13 is connected with the lifting plate 14, and the hot-pressing cylinder 13 can drive the lifting plate 14 to slide along the mounting column 12. A plurality of connecting columns 16 are connected to the bottom of the lifting plate 14, the pressing plate 15 is connected to the bottom of the connecting column 16, and the connecting column 16 is connected to the pressing plate 15. The shape of the pressing plate 15 is matched with the shape of the guide plate 21 and corresponds in position, and the pressing plate 15 can apply pressure to the guide plate 21 during synchronous downward movement with the lifting plate 14, so that the hot-pressing treatment of the light guide plate raw material is completed.

[0041] In the description of the present application, it should be explained that, unless otherwise explicitly defined and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected or integrally connected, it can be mechanically connected, it can be directly connected or indirectly connected through an intermediate medium, it can be the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0042] It should be understood that the terms "length", "width", "up", "down", "front and back", "left and right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0043] Based on the ideal embodiment of the present application, the above description, relevant personnel can make various changes and modifications without deviating from the scope of the present application. The technical scope of the present application is not limited to the contents in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A constant temperature hot-pressing light guide plate mold, characterized in that: The utility model relates to a hot pressing assembly (1) and lower mould (3) are installed in the hot pressing assembly (1) top of base (5), upper mould (2) is installed in lower mould (3) top, the upper mould (2) includes guide plate (21), upper locating plate (23) is installed in the bottom of guide plate (21), upper die core (26) is installed in the top of upper locating plate (23), the lower mould (3) includes base plate (31), lower locating plate (33) is installed in the top of base plate (31), lower die core (36) is installed in the top of lower locating plate (33), the inside of upper die core (26) and lower die core (36) is all set up constant temperature channel (4), and the constant temperature channel (4) includes the water inlet (41) being set up through upper die core (26) and lower die core (36) and first circulation channel (42) and second circulation channel (43) respectively with water inlet (41) intercommunication.

2. The constant-temperature press light guide plate mold according to claim 1, wherein: The water inlet (41) is set through the four side walls of upper die core (26) and lower die core (36), and the water inlet (41) is symmetrically set about the axis of upper die core (26) and lower die core (36).

3. The constant-temperature press light guide plate mold according to claim 2, characterized in that: The first circulation channel (42) and the second circulation channel (43) are set as rectangular channel structures, and the water inlet (41) is respectively communicated with the first circulation channel (42) and the second circulation channel (43) along the length direction thereof.

4. The constant-temperature press light guide plate mold according to claim 3, wherein: The second circulation channel (43) is set inside the first circulation channel (42), and the first circulation channel (42) and the second circulation channel (43) are symmetrically set about the center of upper die core (26) and lower die core (36).

5. The constant-temperature press light guide plate mold according to claim 4, wherein: The first circulation channel (42) is provided with a connecting channel (44) at the four corners, and the connecting channel (44) is communicated with the corner of the second circulation channel (43) away from the side of the first circulation channel (42).

6. The constant-temperature press light guide plate mold according to claim 1, wherein: The guide plate (21) is provided with a group of guide columns (22) at the four corners, the guide columns (22) are installed on the base plate (31), the upper locating plate (23) and the lower locating plate (33) are consistent in shape and correspond in position, and the upper die core (26) and the lower die core (36) are consistent in shape and correspond in position.

7. The constant-temperature press light guide plate mold according to claim 6, wherein: The upper locating plate (23) is provided with locating columns (24) at the four corners, the lower locating plate (33) is provided with locating holes (34) at the four corners, and the locating columns (24) and the locating holes (34) are adaptively matched in shape and correspond in position.

8. The constant-temperature press light guide plate mold according to claim 7, wherein: The upper die core (26) is provided with an upper pressing cavity (27) at the bottom, the lower die core (36) is provided with a lower pressing cavity (37) at the top, and the upper pressing cavity (27) and the lower pressing cavity (37) are adaptively matched in shape and correspond in position.

9. The constant-temperature press light guide plate mold according to claim 1, wherein: The hot pressing assembly (1) comprises a mounting frame (11) and four groups of mounting columns (12) arranged at the bottom of the mounting frame (11), and a hot pressing cylinder (13) is arranged through the top of the mounting frame (11), and a lifting plate (14) is sleeved on the mounting columns (12).

10. The constant-temperature press light guide plate mold according to claim 9, wherein: The lifting plate (14) is connected with a pressing plate (15) at the bottom, and the pressing plate (15) is adaptively matched in shape with the guide plate (21) and correspond in position.

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