Display screen protection panel

Abstract

The utility model relates to the technical field of display accessories, in particular to a display screen protection panel and a manufacturing method of the display screen protection panel. A display screen protection panel comprises an acrylic layer and a plastic layer arranged on one side of the acrylic layer. According to the scheme, a layer of PMMA membrane is additionally arranged on the PC injection molding material, specifically, one surface of the PMMA membrane and the PC injection molding material are subjected to thermoplastic fusion and molding, so that the display screen protection panel is obtained, and the display screen protection panel comprises an acrylic layer corresponding to the PMMA membrane and a plastic layer corresponding to the PC injection molding material. Furthermore, the transparency of the whole product can be effectively improved, specifically, the smoothness and the transparency of the part covered by the acrylic layer are higher, and meanwhile, compared with a glass substrate in the prior art, the display screen protection panel has higher impact resistance, falling resistance and explosion-proof performance, is not prone to breakage and is lower in manufacturing cost.

Description

Technical Field

[0001] The utility model relates to the technical field of display accessories, in particular to a display screen protection panel. Background Art

[0002] A transparent protection panel is usually installed on the display screen of an elevator to protect the display screen from physical damage, such as scratches and collisions; it is also used to prevent impurities such as dust and water droplets from entering the interior of the display screen and affecting the display effect; the transparent panel can also make the display screen look cleaner and more beautiful, and coordinate with the overall design style of the elevator.

[0003] In the prior art, the transparent protection panel on the display screen of an elevator usually adopts a glass plate. For example, a glass display screen and a glass display disclosed in a Chinese utility model with the publication number CN208054685U both adopt a transparent glass substrate.

[0004] However, the above-mentioned solution using a glass plate still has the following deficiencies: Although the glass plate can ensure transparency, it has high process requirements, is easy to break, and has insufficient anti-impact and explosion-proof capabilities.

[0005] Therefore, how to develop a display screen substrate with high anti-impact, drop resistance, explosion-proof and high transparency to overcome the above shortcomings has become a research topic for those skilled in the art. Summary of the Utility Model

[0006] The purpose of the utility model is to provide a display screen protection panel with anti-impact, drop resistance, explosion-proof and transparent properties for the deficiencies of the prior art, aiming to improve the anti-impact, drop resistance and explosion-proof properties of the display screen substrate while ensuring high transparency.

[0007] The utility model realizes the above purpose through the following technical solutions: A display screen protection panel, comprising:

[0008] An acrylic layer and a plastic layer provided on one side of the acrylic layer.

[0009] As a further scheme of the utility model: The display screen protection panel is injection-molded on one side of the acrylic layer, the acrylic layer is a PMMA layer, and the plastic layer is a PC layer or an ABS layer.

[0010] As a further scheme of the utility model: The plastic layer includes a main body layer and a marginal layer. The main body layer matches and connects with the acrylic layer. The marginal layer is provided on the side of the main body layer away from the acrylic layer, and the outer edge of the marginal layer extends beyond the main body layer.

[0011] As a further solution of the present utility model: on the side of the outer edge away from the acrylic layer, there is a nut mounting portion, and a nut mounting groove is provided in the nut mounting portion;

[0012] The outer edge also has a bayonet and a hook, and the hook extends out of the side of the outer edge away from the acrylic layer;

[0013] On the side of the outer edge away from the acrylic layer, there is also a break point that matches the melt injection port of the melt flow guiding member.

[0014] As a further solution of the present utility model: the thickness ratio of the plastic layer is 60% - 90%.

[0015] As a further solution of the present utility model: the thickness ratio of the plastic layer is 95% - 99%.

[0016] As a further solution of the present utility model: the thickness of the plastic layer is 3.9 mm - 3.95 mm, and the thickness of the acrylic layer is 0.05 mm - 0.1 mm.

[0017] As a further solution of the present utility model: a manufacturing method of a display protection panel includes the following steps:

[0018] Material preparation step: Prepare injection plastic and a PMMA film with a predetermined thickness;

[0019] Loading step: Feed the injection plastic into an injection molding machine, and place the PMMA film in the front mold cavity position of the front mold core of the injection mold on the injection molding machine;

[0020] Injection molding step: Close the injection mold, the front mold cavity position of the front mold core and the rear mold cavity position of the rear mold core form the cavity of the injection mold, inject injection melt from the front mold injection port of the front mold plate, the injection melt enters the melt buffer cavity of the melt flow guiding member, then flows to the melt diversion channel, and is injected into the cavity of the injection mold from the melt injection port of the melt diversion channel, so that the injection plastic and the PMMA film are thermoplastically fused. The injection melt also flows into the forming holes in the rear mold cavity position until it dries, cools, solidifies, and forms a finished product. The finished product includes an acrylic layer corresponding to the PMMA film and a plastic layer corresponding to the injection melt;

[0021] First mold opening step: Open the injection mold, separate the front mold core and the rear mold core. The finished product is located in the rear mold cavity position of the rear mold core. The nut mounting portion of the finished product is inserted into the forming hole, the guide hole column in the forming hole is inserted into the nut mounting groove of the nut mounting portion, and the horn waste piece in the melt flow guiding member is connected to the outer edge of the finished product;

[0022] Second mold opening step: The ejector plate drives the ejector pins to eject the finished product. The ejector pins push the guide hole columns to insert into and abut against the nut installation grooves of the nut installation part, so that the nut installation part of the finished product is pushed out of the forming hole. The horn waste part is disconnected and separated from the outer edge of the finished product, and a fracture point is formed at the disconnection position of the outer edge of the finished product and the horn waste part.

[0023] First blanking step: Pull out the nut installation groove on the nut installation part from the guide hole column, so as to take out the finished product.

[0024] Second blanking step: Take out the horn waste part from the melt flow guiding part and reset the melt flow guiding part.

[0025] Circulation step: Repeatedly execute the feeding step to the second blanking step.

[0026] As a further solution of the present utility model: In the material preparation step, preparing the PMMA film with the predetermined thickness includes: stretching the PMMA material or pressing it into a PMMA film with a thickness of 0.05 mm to 0.1 mm by using a high-pressure molding machine.

[0027] The feeding step further includes: One side of the PMMA film abuts against the film accommodating position of the front mold cavity.

[0028] Between the second blanking step and the circulation step, there is also included:

[0029] Nut pre-setting step: Place the nut in the nut installation groove on the nut installation part and fix it by hot melting.

[0030] As a further solution of the present utility model: The material preparation step further includes: The edge of the PMMA film is provided with a limit clamping port, the edge position of the front mold cavity is provided with a limit clamping convex that is clamped into by the limit clamping port, the rear mold frame cavity of the rear mold core is provided with a forming hole for forming the nut installation part on the finished product, and a guide hole column inserted into the forming hole and used for forming the nut installation groove.

[0031] Advantages of the present utility model:

[0032] In this solution, by adding a layer of PMMA film on the injection molding material, specifically, one side of the PMMA film is thermally plastic-fused and formed with the injection molding melt formed by the injection molding material, so as to obtain a display screen protection panel, including an acrylic layer corresponding to the PMMA film and a plastic layer corresponding to the injection molding material. Furthermore, it can effectively improve the transparency of the entire product. Specifically, for the part covered by the acrylic layer, its smoothness and transparency are higher. At the same time, compared with the glass substrate in the prior art, the display screen protection panel of this solution has higher impact resistance, drop resistance and explosion-proof performance, is not easy to break, and has lower production cost. Description of the drawings

[0033] Figure 1Schematic structural diagram of the display protection panel described in the present utility model.

[0034] Figure 2 Schematic plan view and enlarged partial structural view of the display protection panel described in the present utility model.

[0035] Figure 3 Schematic structural diagram of the PMMA film described in the present utility model.

[0036] Figure 4 Schematic structural diagram of the injection mold in the closed mold state described in the present utility model.

[0037] Figure 5 Schematic structural diagram of a state where the PMMA film is loaded into the front mold cavity of the front mold core when the injection mold described in the present utility model is in the open mold state.

[0038] Figure 6 Schematic structural diagram of the injection mold described in the present utility model after injection molding, in the open mold state and after removing the finished product.

[0039] Figure 7 Exploded schematic structural diagram of the injection mold described in the present utility model.

[0040] Figure 8 is Figure 7 Schematic structural diagram from another perspective.

[0041] Figure 9 Schematic structural diagram and exploded diagram of the melt flow guiding member described in the present utility model.

[0042] Figure 10 Schematic structural diagram of the front mold core and the rear mold core in the closed mold state described in the present utility model.

[0043] Figure 11 Schematic structural diagram of the front mold core and the PMMA film described in the present utility model.

[0044] Figure 12 Schematic structural diagram and enlarged partial structural view of removing the finished product from the rear mold core after the injection mold described in the present utility model is opened.

[0045] Reference numerals include:

[0046] 1 - Display protection panel,

[0047] 11 - Acrylic layer, 12 - Plastic layer,

[0048] 121 - Nut installation part, 122 - Nut installation groove;

[0049] 2 - Injection mold,

[0050] 21 - Front mold base, 22 - Front mold core, 23 - Rear mold base, 24 - Rear mold core, 25 - Melt flow guide, 26 - Front template, 27 - Runner plate, 28 - Ejector plate, 29 - Rear template,

[0051] 211 - Front mold runner hole,

[0052] 251 - Melt buffer cavity, 252 - Melt drainage channel, 253 - Horn waste piece, 252a - Melt injection port,

[0053] 261 - Front mold injection port,

[0054] 271 - Runner cavity, 272 - Runner outlet,

[0055] 281 - Ejector pin,

[0056] 221 - Front mold cavity position, 221a - Membrane accommodating position, 221b - Edge position, 221c - Front mold feed hole, 221e - Limit clamping protrusion,

[0057] 241 - Rear mold cavity position, 241a - Forming hole, 241b - Guide hole column;

[0058] 3 - PMMA membrane,

[0059] 31 - Limit clamping port. Detailed implementation mode

[0060] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present utility model.

[0061] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model; the terms "first", "second", "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and defined, the terms "installation", "connection", "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0062] As Figures 1 to 12 shown, in an embodiment of the present utility model, a display screen protection panel 1 is provided, including: an acrylic layer 11 and a plastic layer 12 provided on one side of the acrylic layer 11.

[0063] In this solution, by adding a PMMA film 3 on the injection plastic, specifically, one side of the PMMA film 3 is thermally plastic-fused and formed with the injection melt formed by the injection plastic, thereby obtaining the display screen protection panel 1, including the acrylic layer 11 corresponding to the PMMA film 3 and the plastic layer 12 corresponding to the injection plastic. Furthermore, it can effectively improve the transparency of the entire product. Specifically, the part covered by the acrylic layer 11 has higher smoothness and transparency. At the same time, compared with the glass substrate of the prior art, the display screen protection panel 1 of this solution has higher impact resistance, drop resistance and explosion-proof performance, is not easy to break, and has lower production costs.

[0064] Among them, the injection plastic uses PC injection plastic or ABS injection plastic.

[0065] It should be mentioned that:

[0066] The English abbreviation of polycarbonate is PC, also known as PC plastic; it is a high molecular polymer containing carbonate groups in the molecular chain. According to the structure of the ester group, it can be divided into various types such as aliphatic, aromatic, aliphatic-aromatic, etc. Among them, due to the low mechanical properties of aliphatic and aliphatic-aromatic polycarbonates, their applications in engineering plastics are limited.

[0067] ABS plastic is a ternary copolymer of three monomers: acrylonitrile (A), butadiene (B), and styrene (S). The relative contents of the three monomers can vary arbitrarily to form various resins.

[0068] In one embodiment, the display screen protection panel 1 is injection-molded on one side of the acrylic layer 11. The acrylic layer 11 is a PMMA layer, and the plastic layer 12 is a PC layer or an ABS layer. Furthermore, the transparency of the whole product is further improved. Specifically, for the part covered by the acrylic layer 11, its smoothness and transparency are further improved. At the same time, compared with the glass substrate in the prior art, the display screen protection panel 1 of this solution further improves the impact resistance, drop resistance and explosion-proof performance, is not easy to break, and further reduces the manufacturing cost.

[0069] In another embodiment, as Figure 1 shown, the plastic layer 12 includes a main body layer and a rim layer. The main body layer matches and is connected to the acrylic layer 11. The rim layer is arranged on the side of the main body layer away from the acrylic layer 11, and the outer rim of the rim layer extends out of the main body layer. Specifically, the nut mounting portion 121 is provided with a nut mounting groove 122 for mounting and placing nuts. Specifically, the nut is fixed in the nut mounting groove 122 of the nut mounting portion 121 by hot melting, so as to set the nut in the display screen protection panel 1 in advance, further improving the applicability and assembly convenience. Furthermore, the transparency of the whole product is further improved. Specifically, for the part covered by the acrylic layer 11, its smoothness and transparency are further improved. At the same time, compared with the glass substrate in the prior art, the display screen protection panel 1 of this solution further improves the impact resistance, drop resistance and explosion-proof performance, is not easy to break, and further reduces the manufacturing cost.

[0070] In yet another embodiment, a nut mounting portion 121 is provided on the side of the outer rim away from the acrylic layer 11, and the nut mounting portion 121 is provided with a nut mounting groove 122; the outer rim is further provided with a bayonet and a hook, and the hook extends out of the side of the outer rim away from the acrylic layer 11; the side of the outer rim away from the acrylic layer 11 further has a break point that matches the melt injection port 252a of the melt guiding member 25. Furthermore, it has less manufacturing cost and will not damage the surface of the finished product and affect the overall aesthetics.

[0071] In yet another embodiment, the thickness ratio of the plastic layer 12 is 60% - 90%. Specifically, 70% is preferred. Furthermore, the transparency of the whole product is further improved. Specifically, for the part covered by the acrylic layer 11, its smoothness and transparency are further improved. At the same time, compared with the glass substrate in the prior art, the display screen protection panel 1 of this solution further improves the impact resistance, drop resistance and explosion-proof performance, is not easy to break, and further reduces the manufacturing cost.

[0072] In yet another embodiment, the thickness ratio of the plastic layer 12 is 95% - 99%. Specifically, 98% is preferred. Further, the transparency of the entire product is further improved. Specifically, for the part covered by the acrylic layer 11, its smoothness and transparency are further enhanced. At the same time, compared with the glass substrate in the prior art, the display screen protection panel 1 of this solution further improves impact resistance, drop resistance, and explosion-proof performance, is not easily broken, and further reduces the manufacturing cost.

[0073] In another embodiment, the thickness of the plastic layer 12 is 3.9 mm - 3.95 mm, and the thickness of the acrylic layer 11 is 0.05 mm - 0.1 mm. Specifically, the total thickness of the display screen protection panel 1 is 4 mm. Further, the transparency of the entire product is further improved. Specifically, for the part covered by the acrylic layer 11, its smoothness and transparency are further enhanced. At the same time, compared with the glass substrate in the prior art, the display screen protection panel 1 of this solution further improves impact resistance, drop resistance, and explosion-proof performance, is not easily broken, and further reduces the manufacturing cost.

[0074] In another embodiment, a manufacturing method of a display screen protection panel 1 includes the following steps: a material preparation step, a loading step, an injection molding step, and an unloading step. Among them:

[0075] Material preparation step: Prepare injection molding materials and a PMMA film 3 with a predetermined thickness, where the injection molding materials are PC injection molding materials or ABS injection molding materials;

[0076] Loading step: See Figure 5 , feed the injection molding materials into the injection molding machine, and place the PMMA film 3 at the front mold cavity position 221 of the front mold core 22 of the injection mold 2 on the injection molding machine;

[0077] Injection molding step: See Figure 4 , close the injection mold 2, the front mold cavity position 221 of the front mold core 22 and the rear mold cavity position of the rear mold frame 23 of the rear mold core 24 form the cavity of the injection mold 2, inject the injection molding melt from the injection port of the front mold frame 21 of the front mold frame 21, the injection molding melt enters the melt buffer cavity 251 of the melt flow guiding member 25, then flows to the melt diversion channel 252, and is injected into the cavity of the injection mold 2 from the melt injection port 252a of the melt diversion channel 252, so that the injection molding materials are thermoplastically fused with the PMMA film 3, and the injection molding melt also flows into the forming hole 241a in the rear mold frame 23 cavity position until it is dried, cooled, formed, and solidified to obtain a finished product. The finished product includes an acrylic layer 11 corresponding to the PMMA film 3 and a plastic layer 12 corresponding to the injection molding melt;

[0078] First mold opening step: Open the injection mold 2, separate the front mold core 22 and the rear mold core 24. The finished product is located in the cavity of the rear mold carrier 23 of the rear mold core 24. The nut installation part 121 of the finished product is inserted into the forming hole 241a, the guide hole column 241b in the forming hole 241a is inserted into the nut installation groove 122 of the nut installation part 121, and the horn waste part 253 in the melt flow guiding part 25 is in contact with the outer edge of the finished product.

[0079] Second mold opening step: The ejector plate 28 drives the ejector pin 281 to eject the finished product. The ejector pin 281 pushes the guide hole column 241b to insert into and abut against the nut installation groove 122 of the nut installation part 121, so that the nut installation part 121 of the finished product is pushed out of the forming hole 241a. The horn waste part 253 is disconnected and separated from the outer edge of the finished product, and a break point is formed at the disconnection position of the outer edge of the finished product and the horn waste part 253.

[0080] First blanking step: See Figure 12 and Figure 6 , pull out the nut installation groove 122 on the nut installation part 121 from the guide hole column 241b, so as to take out the finished product.

[0081] Second blanking step: Take out the horn waste part 253 from the melt flow guiding part 25 and reset the melt flow guiding part 25.

[0082] Circulation step: Recursively execute the feeding step to the second blanking step.

[0083] In this solution, by adding a layer of PMMA film 3 on the PC injection molding material, specifically, one side of the PMMA film 3 is thermally fused and formed with the PC injection molding material, so as to obtain the display screen protection panel 1, including the acrylic layer 11 corresponding to the PMMA film 3 and the plastic layer 12 corresponding to the PC injection molding material. Furthermore, it can effectively improve the transparency of the entire product. Specifically, for the part covered by the acrylic layer 11, its smoothness and transparency are higher. At the same time, compared with the glass substrate in the prior art, the display screen protection panel 1 of this solution has higher impact resistance, drop resistance and explosion-proof performance, is not easy to break, and has lower production cost.

[0084] In another embodiment, in the material preparation step, preparing the PMMA film 3 with the predetermined thickness includes: stretching the PMMA material or pressing it into a PMMA film 3 with a thickness of 0.05 mm to 0.1 mm by using a high-pressure molding machine;

[0085] The feeding step further includes: One side of the PMMA film 3 abuts against the film accommodating position 221a of the front mold cavity 221.

[0086] Between the second blanking step and the circulation step, it further includes:

[0087] Nut pre - setting steps: Place the nut in the nut installation groove 122 on the nut installation part 121 and fix it by hot melting, specifically through a hot melting machine. Furthermore, the transparency of the entire product is further improved, specifically for the part covered by the acrylic layer 11, whose smoothness and transparency are further enhanced. At the same time, compared with the glass substrate in the prior art, the display screen protection panel 1 of this solution further improves impact resistance, drop resistance, and explosion - proof performance, is not easily broken, and further reduces the production cost.

[0088] In another embodiment, a limiting clamping port 31 is provided at the edge of the PMMA film 3, and a limiting convex 221e that can be clamped into the limiting clamping port 31 is provided at the edge position 221b of the front mold cavity position 221. In the cavity position of the rear mold frame 23 of the rear mold core 24, there is a forming hole 241a for forming the nut installation part 121 on the finished product, and a guide hole column 241b inserted into the forming hole 241a. Specifically, a guide hole column 241b is provided in the forming hole 241a, so that the nut installation part 121 and the nut installation groove 122 on the nut installation part 121 can be formed during injection molding. Furthermore, the nut can be pre - fixed to the nut installation groove 122 by hot melting to improve the convenience of later installation. Furthermore, the transparency of the entire product is further improved, specifically for the part covered by the acrylic layer 11, whose smoothness and transparency are further enhanced. At the same time, compared with the glass substrate in the prior art, the display screen protection panel 1 of this solution further improves impact resistance, drop resistance, and explosion - proof performance, is not easily broken, and further reduces the production cost.

[0089] As Figures 1 to 12 shown, in the embodiment of the present utility model, an injection mold 2 for manufacturing the display screen protection panel 1 is also provided. Refer to Figure Figures 7 to 12 , which includes: a front template 26, a runner plate 27, a front mold frame 21, a front mold core 22, a rear mold core 24, a rear mold frame 23, a thimble plate 28, a rear template 29, and a melt flow guiding part 25. Among them:

[0090] The front template 26 is provided with a front mold injection port 261;

[0091] The runner plate 27 is arranged on one side of the front template 26, is provided with a runner cavity 271 communicated with the front mold injection port 261, and is provided with a runner outlet 272 on the side far from the front template 26;

[0092] The front mold frame 21 is arranged on the side of the runner plate 27 far from the front template 26, and is provided with a front mold runner hole 211 communicated with the runner outlet 272;

[0093] The front mold core 22 is provided on the side wall of the front mold base 21 away from the side of the runner plate 27. A front mold cavity position 221 is formed. The front mold cavity position 221 includes a diaphragm accommodating position 221a and a marginal position 221b provided on the outer edge of the diaphragm accommodating position 221a. A front mold gate hole 221c communicating with the front mold runner hole 211 is provided on the marginal position 221b;

[0094] The rear mold base 23 is located on the side of the front mold base 21 away from the runner plate 27;

[0095] The rear mold core 24 is provided on the side wall of the rear mold base 23 close to the side of the front mold base 21 and has a rear mold cavity position 241 matching the front mold cavity position 221. After the front mold core 22 and the rear mold core 24 are clamped, the front mold cavity position 221 and the rear mold cavity position 241 form the cavity of the injection mold 2;

[0096] The melt guiding member 25 is provided on the front mold core 22 and / or the rear mold core 24. A melt buffer cavity 251 and a melt guiding channel 252 are provided on the melt guiding member 25. The melt buffer cavity 251 is respectively communicated with the front mold gate hole 221c and the melt guiding channel 252. The melt guiding channel 252 has a certain arc bending structure. One end of the melt guiding channel 252 is communicated with the melt buffer cavity 251, and the other end is communicated with the front mold cavity position 221 and / or the rear mold cavity position 241, so that the injection melt is ejected from the melt guiding channel 252 and enters the cavity of the injection mold 2;

[0097] The ejector plate 28 is provided on the side of the rear mold base 23 away from the front mold base 21 and has ejector pins 281;

[0098] The rear template 29 is provided on the side of the ejector plate 28 away from the rear mold base 23. Specifically, the injection melt is injected from the front mold injection port 261 of the front template 26, enters the runner cavity 271 of the runner plate 27, and exits from the runner outlet 272 of the runner plate 27 into the front mold runner hole 211 of the front mold base 21, then enters the front mold gate hole 221c of the front mold core 22, then enters the melt buffer cavity 251 of the melt guiding member 25 from the front mold gate hole 221c, then flows into the melt guiding channel 252 of the melt guiding member 25, and is injected into the cavity of the injection mold 2 from the melt injection port 252a of the melt guiding channel 252.

[0099] In this solution, by setting an injection mold 2 for manufacturing a display screen protection panel 1, the PMMA film 3 can be placed into the cavity of the injection mold 2, specifically into the film accommodating position 221a of the front mold cavity position 221 of the front mold core 22. After closing the mold and injecting injection melt, the PMMA film 3 and the injection melt are thermoplastically formed, thereby manufacturing a display screen protection panel 1, which can have higher impact resistance, drop resistance, and explosion-proof performance while ensuring high transparency. Among them, the setting of the melt flow guiding member 25 enables the flow rate of the injection melt to enter the cavity of the injection mold 2 only after being buffered by the melt buffer cavity 251 and the melt diversion channel 252 of the melt flow guiding member 25. The resulting finished product, i.e., the display screen protection panel 1, will not be affected by appearance defects such as flushing and bubbles on its surface, and the surface of the finished product will not be damaged when removed, thus not affecting the overall aesthetics.

[0100] It should be noted that through repeated research by the inventor, it is found that without the melt flow guiding member 25, a glue inlet bump will be formed at the connection between the finished product and the glue outlet of the cavity where the injection melt is ejected, affecting the overall appearance of the finished product. Then, it is necessary to additionally set a milling step to remove the glue inlet bump. However, the setting of the melt flow guiding member 25 in this solution enables the flow rate of the injection melt to enter the cavity of the injection mold 2 only after being buffered by the melt buffer cavity 251 and the melt diversion channel 252 of the melt flow guiding member 25. The resulting finished product, i.e., the display screen protection panel 1, will not be affected by appearance defects such as flushing and bubbles on its surface. And when the mold is opened, after the ejector plate 28 ejects the display screen protection panel 1, the horn waste part 253 in the melt flow guiding member 25 can be automatically broken and separated from the display screen protection panel 1, leaving a tiny break point on the edge layer of the display screen protection panel 1 that does not affect the overall appearance. The manufacturing cost is low, the appearance is good, and no glue inlet bump will be generated. Therefore, there is no need for an additional processing step to mill off the glue inlet bump of the finished product.

[0101] Manufacturing process of the display screen protection panel 1:

[0102] First, in the open mold state, the PMMA film 3 is installed on the front mold cavity position 221 of the front mold core 22 by clamping the limit clamping port 31 of the PMMA film 3 to the limit clamping protrusion 221e of the front mold cavity position 221, specifically into the film accommodating position 221a of the front mold cavity position 221.

[0103] Then, close the mold. The front mold base 21 and the rear mold base 23 are closed, and the front mold core 22 and the rear mold core 24 are closed. The front mold cavity position 221 of the front mold core 22 and the rear mold cavity position 241 of the rear mold core 24 form the cavity of the injection mold 2. And the melt buffer cavity 251 of the melt flow guiding member 25 on the rear mold core 24 is communicated with the front mold gate hole 221c of the front mold core 22, and the melt guiding channel 252 of the melt flow guiding member 25 is communicated with the cavity of the injection mold 2, so that the melt injection port 252a of the melt guiding channel 252 can face the front mold cavity position 221 of the front mold core 22. Specifically, the injection melt is ejected from the edge position 221b of the front mold cavity position 221.

[0104] Next, perform injection molding. Inject the injection melt from the front mold injection port 261 of the front template 26. The injection melt passes through the runner plate 27, the front mold base 21, and the front mold core 22, and then enters the melt buffer cavity 251 of the melt flow guiding member 25 from the front mold gate hole 221c of the front mold core 22, so that the flow rate of the injection melt can be buffered. Then the injection melt flows from the melt buffer cavity 251 of the melt flow guiding member 25 to the melt guiding channel 252 and is ejected from the melt injection port 252a of the melt guiding channel 252. Specifically, it is ejected towards the PMMA film 3 located on the front mold cavity position 221 of the front mold core 22. Thus, the injection melt enters the cavity of the injection mold 2 from the melt injection port 252a of the melt flow guiding member 25 and is fully melted and fused with the PMMA film 3.

[0105] Then, cool for a certain period of time, specifically 70s to 100s, preferably 80s to 90s, to cool and form the injection melt in the cavity. Among them, the injection melt in the melt buffer cavity 251 and the melt guiding channel 252 in the melt flow guiding member 25 will also be cooled together and form a horn-shaped waste piece 253. Since the melt guiding channel 252 is communicated with the cavity of the injection mold 2, before the mold is opened, the horn-shaped waste piece 253 is connected to the outer edge of the finished product, that is, the display screen protection panel 1.

[0106] Finally, the mold is opened. The front mold base 21 and the rear mold base 23 are opened, and the front mold core 22 and the rear mold core 24 are opened to obtain the finished product, i.e., the display screen protection panel 1. Since the forming hole 241a is provided on the rear mold cavity position 241 of the rear mold core 24, and the guide hole column 241b, i.e., the ejector pin 281, extends into the forming hole 241a, when the mold is opened, the nut mounting portion 121 can be formed on the display screen protection panel 1. And since the nut mounting groove 122 of the nut mounting portion 121 is formed by the guide hole column 241b, when the mold is opened, the nut mounting groove 122 of the nut mounting portion 121 is inserted onto the guide hole column 241b, so that when the mold is opened, the finished product, i.e., the display screen protection panel 1, is located on the rear mold cavity position 241 of the rear mold core 24. When the guide hole column 241b is the ejector pin 281, the ejector plate 28 pushes out the ejector pin 281, and the finished product, i.e., the display screen protection panel 1, can be pushed out from the rear mold cavity position 241 of the rear mold core 24. At the same time, the horn waste piece 253 is disconnected and separated from the display screen protection panel 1, so that a break point is formed at the break of the display screen protection panel 1 from the horn waste piece 253. Finally, the operator can remove the finished product, i.e., the display screen protection panel 1. Then, a new PMMA film 3 can be reinstalled on the front mold cavity position 221 of the front mold core 22, and then the next new finished product can be injection molded.

[0107] In addition, since the PMMA film 3 is snapped into the limit convex 221e of the front mold cavity position 221 through the limit snap-in port 31, the limit convex 221e can protrude from the PMMA film 3. During injection molding, the limit convex 221e can form a bayonet and a hook on the finished product, making it easier to install the finished product, i.e., the display screen protection panel 1, on the display screen of the elevator. Specifically, by presetting a buckle portion on the outer side edge of the display screen of the elevator that matches the hook, during installation, the hook can be directly aligned with the buckle portion and snapped in and engaged, thereby fastening the display screen protection panel 1 to the display screen of the elevator.

[0108] In one embodiment, as Figure 9 shown, the melt drainage channel 252 has a horn structure. Specifically, the channel opening of the melt drainage channel 252 gradually becomes smaller from large. The large end of the channel opening is connected to the melt buffer cavity 251, and the small end of the channel opening is the melt injection port 252a, which is connected to the cavity of the injection mold 2, i.e., connected to the front mold cavity position 221 and / or the rear mold cavity position 241, so as to inject the injection melt into the cavity of the injection mold 2. Specifically, since the channel opening at the melt injection port 252a is smaller, after the mold is opened, when the ejector plate 28 pushes out the display screen protection panel 1, it is easier for the display screen protection panel 1 to be disconnected and separated from the horn waste piece 253, and the break point formed on the display screen protection panel 1 is smaller, thus not affecting the overall appearance.

[0109] Preferably, the melt injection port 252a faces the edge position 221b of the front mold cavity position 221 and is adjacent to the edge position 221b.

[0110] Preferably, the melt flow guiding member 25 is provided on the rear mold core 24, and the melt injection port 252a injects melt towards the front mold cavity position 221 of the front mold core 22, specifically towards the edge position 221b of the front mold cavity position 221. Since the PMMA film 3 is placed in the front mold cavity of the front mold core 22, such an arrangement of the injection direction is more conducive to the full thermal melting of the injection melt and the PMMA film 3, and the transparency and impact resistance of the final product, i.e., the display screen protection panel 1, will also be better.

[0111] In another embodiment, as Figure 5 and Figure 11 shown, a limit clamping protrusion 221e is provided at the edge position 221b of the front mold cavity position 221 for mating and clamping with the limit clamping port 31 of the PMMA film 3, so as to firmly fix the PMMA film 3 on the front mold cavity position 221.

[0112] In yet another embodiment, as Figure 6 and Figure 12 shown, a forming hole 241a and a guide hole post 241b inserted into the forming hole 241a are provided at a position of the rear mold cavity position 241 opposite to the edge position 221b of the front mold cavity position 221, so as to form the nut mounting portion 121 of the display screen protection panel 1. Specifically, the forming hole 241a is used to form the outer contour of the nut mounting portion 121, and the guide hole post 241b forms a nut mounting groove 122 for placing the nut on the nut mounting portion 121. Furthermore, the nut can be pre-fixed to the nut mounting groove 122 by hot melting to improve the convenience of later installation. And after the ejector plate 28 ejects the display screen protection panel 1 during mold opening, the guide hole post 241b can still be inserted into the nut mounting groove 122, so that the display screen protection panel 1 will not fall off after being ejected, and it is easy for the operator to take. Among them, the guide hole post 241b can be replaced by the ejector pin 281 on the ejector plate 28, or the guide hole post 241b is provided at the end of the ejector pin 281 on the ejector plate 28 and is telescoped in the forming hole 241a by being pushed by the ejector pin 281 on the ejector plate 28, that is, both the ejector pin 281 and the guide hole post 241b extend into the forming hole 241a, and during mold opening, the ejector pin 281 pushes the guide hole post 241b to eject the finished product.

[0113] Finally, it should be noted that the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A display screen protection panel, characterized in that: include: An acrylic layer (11) and a plastic layer (12) arranged on one side of the acrylic layer (11); the display screen protection panel is manufactured by injection molding on one side of the acrylic layer (11); the acrylic layer (11) is a PMMA layer; and the plastic layer (12) is a PC layer or an ABS layer.

2. The display screen protection panel according to claim 1, characterized in that: The plastic layer (12) comprises a main body layer and an edge layer, the main body layer matches the acrylic layer (11) and is connected to the acrylic layer (11), the edge layer is arranged on a side of the main body layer away from the acrylic layer (11), and the outer edge of the edge layer protrudes from the main body layer.

3. The display screen protection panel according to claim 2, characterized in that: A nut mounting portion (121) is provided on a side of the outer edge away from the acrylic layer (11), and the nut mounting portion (121) is provided with a nut mounting groove (122); The outer edge is also provided with a latch and a latch hook, the latch hook extending from a side of the outer edge away from the acrylic layer (11); The side of the outer edge away from the acrylic layer (11) also has a fracture point.

4. The display screen protection panel according to claim 1, characterized in that: The thickness of the plastic layer (12) accounts for 60% to 90%.

5. The display screen protection panel according to claim 1, characterized in that: The thickness of the plastic layer (12) accounts for 95% to 99%.

6. The display screen protection panel according to claim 1, characterized in that: The thickness of the plastic layer (12) is 3.9 mm to 3.95 mm, and the thickness of the acrylic layer (11) is 0.05 mm to 0.1 mm.

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