Injection mold for display panel production

Abstract

The utility model discloses an injection mold for producing a display panel. The injection mold comprises a top plate, a pouring nozzle, an upper mold plate, a lower mold plate, a bottom plate, an ejector pin mechanism and an ejector pin plate, a mold cavity insert is arranged at the bottom of the upper mold plate, a mold core insert is arranged at the top of the lower mold plate, and two symmetrically arranged molding holes are formed between the mold cavity insert and the mold core insert. According to the utility model, the two symmetrically arranged molding holes are arranged in the injection mold, so that the injection mold can simultaneously produce two curved-surface display panels during one-time mold opening and closing, and the production efficiency is high; meanwhile, the cross section of the mold core insert is of a V-shaped structure, and the middle part of the mold core insert is provided with the pouring channel for communicating the two forming holes, so that the molten plastic raw material can be uniformly conveyed and filled in the forming holes, and the mold core insert of the V-shaped structure can increase the flowing resistance of the plastic raw material so as to slow down the flowing speed of the plastic raw material; therefore, bubbles are reduced, and the product quality is improved.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, in particular to an injection mold for producing display panels. Background Art

[0002] Injection molds are tools for producing plastic products, and also tools for giving plastic products complete structures and precise dimensions; injection molding is a processing method used in mass production of certain parts with complex shapes. Specifically, it refers to the process of injecting heated and melted plastic into the mold cavity under high pressure by an injection molding machine, and obtaining a molded product after cooling and solidification.

[0003] In the prior art, display panels used to assemble display screens are usually made of plastic, and the display panels are formed by injection molding and curing through injection molds; the traditional injection molds used to produce display panels are single-cavity structures, that is, only one product can be produced at a time when the mold is opened and closed, and the production efficiency is low; in addition, when producing curved display panels, during the demolding and ejection process, the plane at the top of the ejector pin is prone to scratches on the product surface, thereby causing deformation or defects, affecting the appearance quality of the curved display panel products.

[0004] Therefore, the prior art has defects and needs to be improved. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an injection mold for producing display panels which is not easy to damage the product during demoulding and ejection and can realize one-out-two injection.

[0006] To achieve this purpose, the utility model adopts the following technical solutions: an injection mold for display panel production, including a top plate, a pouring nozzle, an upper mold plate, a lower mold plate, a bottom plate, an ejector mechanism and an ejector plate;

[0007] The top plate is arranged on the top of the upper template, the bottom plate is connected to the bottom of the lower template through the mold foot, and the upper template is arranged above the lower template;

[0008] A cavity insert is provided at the bottom of the upper template, a core insert is provided at the top of the lower template, and two symmetrically arranged molding points are formed between the cavity insert and the core insert, and the two molding points are used for one-out-two molding of curved display panel products;

[0009] A pouring channel for connecting the two molding points is provided in the middle of the core insert, and the pouring nozzle passes through the top plate and the upper mold plate from top to bottom in sequence and abuts against the pouring channel, and the pouring nozzle is used to transport the molten plastic raw material into the molding point through the pouring channel;

[0010] The ejector plate is arranged between the lower mold plate and the bottom plate, the ejector mechanism is arranged on the ejector plate, and the ejector mechanism is used to eject the curved display panel product after injection molding upwards.

[0011] By adopting the above-mentioned technical solutions, in the injection mold for producing the display panel, the ejector mechanism includes a round ejector, a spring member and an ejector guide rod;

[0012] The bottom of the ejector guide rod is connected to the ejector plate, the lower mold plate is provided with a penetrating guide hole, the ejector guide rod can reciprocate along the guide hole, and the spring member is provided between the ejector plate and the lower mold base;

[0013] The bottom of the dome pin is arranged on the ejector plate, and the top of the dome pin passes through the lower template from bottom to top and is located in the molding cavity. The dome pin is used to eject the curved display panel product from the molding cavity as the ejector plate moves upward.

[0014] By adopting the above-mentioned technical solutions, in the injection mold for producing the display panel, the top surface of the dome pin is a slope structure, and the slope structure is used to fit with the bottom surface of the curved display panel product.

[0015] By adopting the above-mentioned technical solutions, in the injection mold for producing the display panel, an ejection hole is provided in the middle of the bottom plate, and the ejection hole is used for an external push rod mechanism to apply force on the ejector plate.

[0016] By adopting the above-mentioned technical solutions, in the injection mold for producing the display panel, the core insert is provided with a plurality of ejector holes for the round ejector pins to pass through.

[0017] By adopting the above-mentioned technical solutions, the injection mold for producing the display panel further includes guide columns, four of which are arranged between the upper template and the lower template, and the guide columns are used to guide the upper template to move vertically up and down.

[0018] By adopting the above-mentioned technical solutions, in the injection mold for producing the display panel, positioning protrusions are provided on both sides of the top surface of the core insert, and positioning grooves for matching and abutting with the positioning protrusions are provided on the cavity insert.

[0019] By adopting the above-mentioned technical solutions, in the injection mold for producing the display panel, the cross section of the core insert is a V-shaped structure.

[0020] By adopting the above-mentioned technical solutions, the injection mold for producing the display panel further includes a first cooling pipe and a second cooling pipe;

[0021] The first cooling channel is arranged inside the cavity insert, and the first cooling channel has a first liquid inlet and a first liquid outlet, and the first liquid inlet and the first liquid outlet are exposed on the side wall of the upper template;

[0022] The second cooling channel is arranged inside the core insert, the second cooling channel has a second liquid inlet and a second liquid outlet, and the second liquid inlet and the second liquid outlet are exposed on the side wall of the lower template;

[0023] The first cooling pipe and the second cooling pipe are both used for passing cooling liquid.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] The utility model provides two symmetrically arranged molding points in the injection mold, so that the injection mold can produce two curved display panels at the same time in one mold opening and closing, thereby effectively improving the injection molding efficiency of the product; at the same time, the cross section of the core insert is a V-shaped structure, and a pouring channel for connecting the two molding points is provided in the middle of the core insert. Such a configuration allows the molten plastic raw material to be evenly transported and filled in the molding points, and the V-shaped core insert can increase the flow resistance of the plastic raw material to slow down the flow speed of the plastic raw material, thereby reducing the generation of bubbles and improving the quality of the product; the top surface of the dome pin is a sloped structure, which can better fit the bottom surface of the curved display panel product to avoid scratching the product during the ejection process, thereby improving the production quality of the product appearance. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0027] The structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with this technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantive technical significance. Any structural modification, change in proportion or adjustment of size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention.

[0028] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0029] Figure 2It is a schematic diagram of the assembly structure between the upper template and the lower template of the utility model;

[0030] Figure 3 It is a schematic diagram of the assembly structure between the cavity insert and the upper template of the utility model;

[0031] Figure 4 It is a schematic diagram of the assembly structure between the core insert and the lower template of the utility model;

[0032] Figure 5 It is a schematic diagram of the core insert structure of the utility model. DETAILED DESCRIPTION

[0033] In order to make the utility model's purpose, features, and advantages more obvious and easy to understand, the following will be combined with the drawings in the utility model embodiments to clearly and completely describe the technical solutions in the utility model embodiments. Obviously, the embodiments described below are only part of the utility model embodiments, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present invention, it should be understood that the terms "upper", "lower", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention. It should be noted that when a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be a centrally arranged component at the same time.

[0035] The technical solution of the utility model is further explained below with reference to the accompanying drawings and through specific implementation methods.

[0036] like Figures 1 to 5As shown, the embodiment of the utility model provides an injection mold for display panel production, including a top plate 1, a pouring nozzle 2, an upper mold plate 3, a lower mold plate 4, a bottom plate 5, an ejector mechanism 6 and an ejector plate 7; the top plate 1 is arranged on the top of the upper mold plate 3, the bottom plate 5 is connected to the bottom of the lower mold plate 4 through a mold foot 8, the upper mold plate 3 is arranged above the lower mold plate 4, a cavity insert 31 is arranged at the bottom of the upper mold plate 3, and a core insert 41 is arranged at the top of the lower mold plate 4, and two symmetrically arranged molding points are formed between the cavity insert 31 and the core insert 41, and the two molding points are used for molding two curved display surfaces. board product; the cavity insert 31 is located at the bottom of the upper template 3, and is used to form the outer contour and surface features of the display panel product. The internal cavity shape of the cavity insert 31 matches the outer shape of the product. The plastic is melted and filled into the cavity insert 31, and the external shape of the product is formed after cooling; and the core insert 41 is located at the top of the lower template 4, and corresponds to the cavity insert 31, and is used to form the internal structure and features of the product, such as wall thickness, cavity, etc.; by arranging two symmetrically arranged molding points in the injection mold, the injection mold can produce two curved display panels at the same time in one opening and closing of the mold, which effectively improves the injection molding efficiency of the product.

[0037] like Figure 4 and Figure 5 As shown, the cross section of the core insert 41 is V-shaped, and a pouring channel 410 for connecting the two molding points is provided in the middle of the core insert 41. The pouring nozzle 2 passes through the top plate 1 and the upper mold plate 3 from top to bottom in sequence and abuts against the pouring channel 410. The pouring nozzle 2 is used to transport the molten plastic raw material to the molding points through the pouring channel 410; the cross section of the core insert 41 is V-shaped, that is, the two molding points are symmetrically arranged with the center line of the core insert 41 as the axis, and the pouring channel 410 for connecting the two molding points is provided in the middle of the core insert 41. Such an arrangement allows the molten plastic raw material to be evenly transported and filled in the molding points, and the V-shaped core insert 41 can increase the flow resistance of the plastic raw material to slow down the flow speed of the plastic raw material, thereby reducing the generation of bubbles and improving the quality of the product.

[0038] like Figure 1 As shown, the ejector plate 7 is arranged between the lower mold plate 4 and the bottom plate 5, and the ejector mechanism 6 is arranged on the ejector plate 7. When the curved display panel product is completed by injection molding and cooled and solidified, the ejector mechanism 6 can eject the curved display panel product upward so that an external robot can perform material picking operations.

[0039] like Figure 1 and Figure 4As shown, further, the ejector mechanism 6 includes a dome ejector pin 61, a spring member 62 and an ejector guide rod 63, the bottom of the ejector guide rod 63 is connected to the ejector plate 7, the lower mold plate 4 is provided with a penetrating guide hole (not shown), the ejector guide rod 63 can reciprocate along the guide hole, the spring member 62 is arranged between the ejector plate 7 and the lower mold base, the bottom of the dome ejector pin 61 is arranged on the ejector plate 7, and the top of the dome ejector pin 61 passes through the lower mold plate 4 from bottom to top and is located in the molding cavity, and the dome ejector pin 61 is used to eject the curved display panel product from the molding cavity as the ejector plate 7 moves upward. When the injection molding is completed, the ejector plate 7 moves upward under the push of the external push rod mechanism, so as to drive the dome ejector pin 61 to rise and contact the product at the same time. As the ejector plate 7 continues to move upward, the dome ejector pin 61 applies pressure to eject the product from the molding hole, thereby completing the demoulding operation. Finally, the ejector plate 7 descends, and the dome ejector pin 61 returns to the initial position, ready for the next ejection action. The setting of the ejector guide rod 63 can improve the stability of the up and down movement of the ejector plate 7; the setting of the spring member 62 can provide a buffering effect for the ejector mechanism 6.

[0040] like Figure 4 As shown, further, the top surface of the dome pin 61 is a slope structure 610, and the slope structure 610 is used to fit with the bottom surface of the curved display panel product. The setting of the slope structure 610 can better fit with the bottom surface of the curved display panel product, avoid scratching the product during the ejection process, and thus improve the production quality of the product appearance.

[0041] like Figure 1 As shown, further, an ejection hole 50 is provided in the middle of the bottom plate 5, and the ejection hole 50 is used for an external push rod mechanism to apply force on the ejector plate 7. The ejection hole 50 serves as an avoidance hole, which can provide an avoidance channel for the external push rod mechanism.

[0042] like Figure 5 As shown, further, the core insert 41 is provided with a plurality of ejector holes 411 for the ejector pins 61 to pass through. The ejector holes 411 can improve the stability of the ejector pins 61 during ejection and avoid deviation from the path.

[0043] like Figure 2 As shown, further, guide posts 9 are included, and four guide posts 9 are arranged between the upper template 3 and the lower template 4, and the guide posts 9 are used to guide the upper template 3 to move vertically up and down. The setting of the guide posts 9 can achieve accurate alignment between the upper template 3 and the lower template 4, avoiding affecting the injection molding accuracy of the product due to inaccurate alignment.

[0044] like Figures 2 to 4As shown, further, positioning protrusions 412 are provided on both sides of the top surface of the core insert 41, and positioning grooves 311 are provided on the cavity insert 31 for adapting and abutting with the positioning protrusions 412. The arrangement of the positioning protrusions 412 and the positioning grooves 311 can improve the alignment accuracy between the core insert 41 and the cavity insert 31, and avoid offset or misalignment during the mold closing process.

[0045] like Figure 3 and Figure 4 As shown, further, it also includes a first cooling pipe 312 and a second cooling pipe 413, the first cooling pipe 312 is arranged inside the cavity insert 31, the first cooling pipe 312 has a first liquid inlet 3121 and a first liquid outlet 3122, the first liquid inlet 3121 and the first liquid outlet 3122 are exposed on the side wall of the upper template 3, the second cooling pipe 413 is arranged inside the core insert 41, the second cooling pipe 413 has a second liquid inlet 4131 and a second liquid outlet 4132, the second liquid inlet 4131 and the second liquid outlet 4132 are exposed on the side wall of the lower template 4, and the first cooling pipe 312 and the second cooling pipe 413 are both used to pass cooling liquid. The first cooling pipe 312 can cool the cavity insert 31, and the second cooling pipe 413 can cool the core insert 41, so as to quickly solidify the molten plastic raw material, speed up the molding speed of the curved display panel product, shorten the production cycle, and improve production efficiency.

[0046] As described above, the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some of the technical features can be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the utility model.

Claims

1. An injection mold for display panel production, characterized in that: It includes a top plate, a pouring nozzle, an upper mold plate, a lower mold plate, a bottom plate, an ejector mechanism and an ejector plate; The top plate is arranged on the top of the upper template, the bottom plate is connected to the bottom of the lower template through the mold foot, and the upper template is arranged above the lower template; A cavity insert is provided at the bottom of the upper template, a core insert is provided at the top of the lower template, and two symmetrically arranged molding points are formed between the cavity insert and the core insert, and the two molding points are used for one-out-two molding of curved display panel products; A pouring channel for connecting the two molding points is provided in the middle of the core insert, and the pouring nozzle passes through the top plate and the upper mold plate from top to bottom in sequence and abuts against the pouring channel, and the pouring nozzle is used to transport the molten plastic raw material into the molding point through the pouring channel; The ejector plate is arranged between the lower mold plate and the bottom plate, the ejector mechanism is arranged on the ejector plate, and the ejector mechanism is used to eject the curved display panel product after injection molding upwards.

2. The injection mold for display panel production according to claim 1, characterized in that: The ejector mechanism comprises a dome ejector, a spring member and an ejector guide rod; The bottom of the ejector guide rod is connected to the ejector plate, the lower template is provided with a penetrating guide hole, the ejector guide rod can reciprocate along the guide hole, and the spring member is arranged between the ejector plate and the lower template; The bottom of the dome pin is arranged on the ejector plate, and the top of the dome pin passes through the lower template from bottom to top and is located in the molding cavity. The dome pin is used to eject the curved display panel product from the molding cavity as the ejector plate moves upward.

3. The injection mold for display panel production according to claim 2, characterized in that: The top surface of the dome pin is a sloped structure, and the sloped structure is used to fit with the bottom surface of the curved display panel product.

4. The injection mold for display panel production according to claim 2, characterized in that: An ejection hole is provided in the middle of the bottom plate, and the ejection hole is used for an external push rod mechanism to apply force on the ejector plate.

5. The injection mold for display panel production according to claim 2, characterized in that: The core insert is provided with a plurality of ejector holes for the round ejector pins to pass through.

6. The injection mold for display panel production according to claim 1, characterized in that: It also includes guide columns, four of which are arranged between the upper template and the lower template, and are used to guide the upper template to move vertically up and down.

7. The injection mold for display panel production according to claim 1, characterized in that: Positioning protrusions are arranged on both sides of the top surface of the core insert, and positioning grooves for matching and abutting with the positioning protrusions are arranged on the cavity insert.

8. The injection mold for display panel production according to claim 1, characterized in that: The cross section of the core insert is a V-shaped structure.

9. The injection mold for display panel production according to claim 1, characterized in that: Also includes a first cooling pipeline and a second cooling pipeline; The first cooling channel is arranged inside the cavity insert, and the first cooling channel has a first liquid inlet and a first liquid outlet, and the first liquid inlet and the first liquid outlet are exposed on the side wall of the upper template; The second cooling channel is arranged inside the core insert, the second cooling channel has a second liquid inlet and a second liquid outlet, and the second liquid inlet and the second liquid outlet are exposed on the side wall of the lower template; The first cooling pipe and the second cooling pipe are both used for passing cooling liquid.

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