A two-color mold-in-plastics structure for producing an electronic price tag

Abstract

This utility model discloses a two-color molded adhesive structure for producing electronic shelf labels, including a chassis. A single-color mold body and a two-color mold body are mounted side-by-side on the top of the chassis. Both the single-color and two-color mold bodies include: a B-plate connected to the top of the chassis; and a mold core embedded in the bottom of the B-plate. The bottom of the mold core has several mold cavities for forming the electronic shelf labels. The single-color mold body has a first hot runner, the bottom of which branches into several injection channels for directly injecting adhesive into the sides of the mold cavities. This utility model, by extending the injection channels directly to the sides of the mold cavities within the single-color mold body, allows for the initial molding of the electronic shelf labels while eliminating the need for a cold runner design. This allows molten adhesive to be directly poured into the steel plate within the mold cavity, preventing the formation of slag and avoiding adhesive waste.

Description

Technical Field

[0001] This utility model specifically relates to a two-color molded adhesive structure for producing electronic shelf labels. Background Technology

[0002] Electronic shelf labels are intelligent display devices that use electronic technology to replace traditional paper labels. They are widely used in retail, warehousing, medical and other fields, and are mainly used for price information display in supermarkets, convenience stores, pharmacies and other scenarios. They are a type of plastic product. During the injection molding process, the molten plastic used for injection needs to enter the mold cavity through a preset gate runner. After the electronic shelf label cools and solidifies, ejector pins are used to eject the injection molded electronic shelf label from the mold core. However, in the existing two-color injection molding structure, in order to save water resources, the molten glue inside the hot runner flows into the mold cavity through the cold runner during injection, which will generate sprue and cause waste of molten glue.

[0003] Therefore, it is necessary to invent a two-color molded adhesive structure for producing electronic shelf labels to solve the above problems. Utility Model Content

[0004] (a) Purpose of the utility model To address the technical problems existing in the background art, this utility model proposes a two-color injection molding structure for producing electronic shelf labels. By extending an injection channel directly to the side of the mold cavity within a single-color mold body, the electronic shelf label can be initially formed by injection molding, while omitting the design of a cold runner. This allows the molten adhesive to be directly poured into the steel plate inside the mold cavity without producing material head and avoiding waste of molten adhesive.

[0005] (II) Technical Solution To achieve the above objectives, this utility model provides the following technical solution: a two-color molded adhesive structure for producing electronic shelf labels, comprising a chassis, wherein a single-color mold body and a two-color mold body are mounted side-by-side on the top of the chassis, and both the single-color mold body and the two-color mold body include: B plate, which is connected to the top of the chassis; The mold core is embedded in the bottom of the B plate, and the bottom of the mold core is provided with several mold cavities for forming electronic price tags; The mold body has a first hot runner inside, and the bottom of the first hot runner is forked into several injection channels for directly injecting glue into the side of the mold cavity. The two-color mold body has a second hot runner, and a cold runner is provided between every two adjacent mold cavities inside the two-color mold body. The bottom of the second hot runner is forked into several two-shot injection channels for injecting glue into the cold runner.

[0006] Preferably, each of the B plates is provided with a hot runner plate on top, and a code template is connected to the top of the hot runner plate.

[0007] Preferably, each of the hot runner plates is provided with two square irons arranged side by side between it and the B plate at its bottom.

[0008] Preferably, a pin plate is installed between the two square irons at the top of each B plate.

[0009] Preferably, each B plate has four sets of mold cavities at the bottom, with each set consisting of two mold cavities arranged side by side.

[0010] Preferably, the bottom of the first hot runner branch has eight injection channels, and the eight injection channels correspond one-to-one with the eight mold cavities located inside the mold body, and the bottom outlet of each injection channel is connected to the side of the mold cavity below it.

[0011] Preferably, the bottom of the second hot runner branch has four jet channels, and the four jet channels correspond one-to-one with the four cold runners, with the bottom outlet of each jet channel connected to the cold runner below it.

[0012] Compared with the prior art, the beneficial effects of the above-mentioned technical solution of this utility model are: This invention, within a single-color mold body, extends a single injection channel directly to the side of the mold cavity. This allows for the initial molding of electronic price tags while eliminating the need for a cold runner system. The molten adhesive can then be directly poured into the steel plate within the mold cavity without creating runner heads, thus avoiding adhesive waste. Furthermore, the internal structure of the two-color mold body is identical to that of a traditional two-color mold. After being cooled by the cold runner, the molten adhesive in the two injection channels can cover the outer surface of the electronic price tag, concealing any direct pouring marks left by the single injection channel. This ensures the integrity of the finished electronic price tag's appearance. Therefore, this two-color mold injection structure for producing electronic price tags guarantees production quality while saving on molten adhesive usage. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a half-sectional view of the single-color mold body and the two-color mold body of this utility model; Figure 3 This is a schematic diagram of the structure of the first and second hot runners of this utility model; Figure 4 This is a bottom view of the single-color mold body and the two-color mold body of this utility model.

[0014] Explanation of reference numerals in the attached figures: 1. Chassis, 2. Single-color mold body, 3. Two-color mold body, 4. B plate, 5. Mold core, 6. Mold cavity, 7. First hot runner, 8. First injection runner, 9. Second hot runner, 10. Cold runner, 11. Second injection runner, 12. Hot runner plate, 13. Mold plate, 14. Square iron, 15. Ejector plate. Detailed Implementation

[0015] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0016] This utility model provides, for example Figure 1-4 The diagram shows a two-color molded adhesive structure for producing electronic shelf labels, including a chassis 1. A single-color mold body 2 and a two-color mold body 3 are mounted side-by-side on the top of the chassis 1. Both the single-color mold body 2 and the two-color mold body 3 include: B plate 4, which is connected to the top of chassis 1; Mold core 5 is embedded in the bottom of the B plate 4, and the bottom of the mold core 5 is provided with a plurality of mold cavities 6 for forming electronic price tags; The mold body 2 has a first hot runner 7 inside, and the bottom of the first hot runner 7 is forked into several injection channels 8 for directly injecting glue into the side of the mold cavity 6. The two-color mold body 3 has a second hot runner 9 inside, and a cold runner 10 is provided between every two adjacent left and right mold cavities 6 inside the two-color mold body 3. The bottom of the second hot runner 9 is forked into several two-shot injection channels 11 for injecting glue into the cold runner 10.

[0017] In one embodiment, a hot runner plate 12 is provided on the top of each B plate 4, and a code template 13 is connected to the top of the hot runner plate 12 for guiding molten glue into the mold cavity 6. Two square irons 14 are provided side by side between each hot runner plate 12 and the B plate 4 at its bottom for supporting the hot runner plate 12 and the code template 13 and providing a space for the ejector plate 15. An ejector plate 15 is installed between the two square irons 14 at the top of each B plate 4 to eject the formed electronic price tag.

[0018] In one embodiment, each B plate 4 has four sets of mold cavities 6 at its bottom, with each set consisting of two mold cavities 6 arranged side by side. The bottom of the first hot runner 7 is branched into eight injection channels 8. The eight injection channels 8 correspond one-to-one with the eight mold cavities 6 located inside the mold body 2. The bottom outlet of each injection channel 8 is connected to the side of the mold cavity 6 below it, so that the molten adhesive can be directly poured into the mold cavity 6, avoiding the use of the cold runner 10 and preventing the formation of sprues.

[0019] In one embodiment, the bottom of the second hot runner 9 is branched into four two-jet channels 11, which correspond one-to-one with the four cold runners 10. The bottom outlet of each two-jet channel 11 is connected to the cold runner 10 below it, so that the molten adhesive in the two-jet channel 11 can cover the outside of the electronic label after being cooled by the cold runner 10, ensuring the integrity of the appearance of the formed electronic label.

[0020] The specific implementation method is as follows: This utility model is an inverted mold. When in use, the gate is located on the outer moving mold, and the steel plate used for molding is placed directly in the mold cavity 6. Then, the molten glue is injected into the first hot runner 7 through the gate. At this time, the molten glue flows downward through the inside of the first hot runner 7 until it reaches the bifurcation area, where it is divided into eight parts and flows into the injection channel 8 respectively. Then, it flows downward along the injection channel 8 to the sides of the eight mold cavities 6 at the bottom of the single-color mold body 2. In this process, the design of the cold runner 10 is omitted inside the single-color mold body 2, and it is transformed into directly pouring the steel plate in the mold cavity 6, so that the molten glue can directly contact the steel plate. There will be no sprue due to the presence of the cold runner 10, which greatly saves molten glue. After the electronic label is initially formed inside the first-color mold body 2, it is ejected by the ejector plate 15 and then manually transferred to the second-color mold body 3. At this time, the molten glue flows downward through the second hot runner 9 until it reaches the bifurcation area, where it is divided into four parts and flows into the second injection channel 11. Then, it flows downward through the second injection channel 11 to the four cold runners 10 below. The molten glue flowing into the mold cavity 6 through the cold runners 10 will cover the outside of the electronic label after being cooled by the cold runners 10, covering the direct injection marks left by the first injection channel 8, so that the electronic label can maintain its appearance after molding. Finally, after the electronic shelf label has solidified, the formed electronic shelf label is ejected by the ejector plate 15 inside the two-color mold body 3, thus completing the collection of the electronic shelf label. This embodiment specifically solves the problem in the prior art where, in order to save water resources, the molten adhesive inside the hot runner flows into the mold cavity 6 through the cold runner 10 during injection, which generates sprue and wastes molten adhesive.

[0021] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used above are only some embodiments recorded in this utility model. Obviously, those skilled in the art can obtain other drawings based on these drawings.

[0022] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A two-color molded adhesive structure for producing electronic shelf labels, characterized in that, include: The chassis (1) has a single-color mold body (2) and a two-color mold body (3) mounted side by side on its top. Both the single-color mold body (2) and the two-color mold body (3) include: B plate (4), which is connected to the top of the chassis (1); The mold core (5) is embedded in the bottom of the B plate (4), and the bottom of the mold core (5) is provided with a number of mold cavities (6) for forming electronic price tags. The mold body (2) has a first hot runner (7) inside, and the bottom of the first hot runner (7) is forked into several injection channels (8) for directly injecting glue into the side of the mold cavity (6). The two-color mold body (3) has a second hot runner (9) inside, and a cold runner (10) is provided between every two adjacent left and right mold cavities (6) inside the two-color mold body (3). The bottom of the second hot runner (9) is forked into several two-shot injection channels (11) for injecting glue into the cold runner (10).

2. The two-color molded adhesive structure for producing electronic shelf labels according to claim 1, characterized in that: Each of the B plates (4) is provided with a hot runner plate (12) on top, and a code template (13) is connected to the top of the hot runner plate (12).

3. The two-color molded adhesive structure for producing electronic shelf labels according to claim 2, characterized in that: Two square irons (14) are arranged side by side between each of the hot runner plates (12) and its bottom B plate (4).

4. The two-color molded adhesive structure for producing electronic shelf labels according to claim 3, characterized in that: A pin plate (15) is installed between the two square irons (14) at the top of each B plate (4).

5. The two-color molded adhesive structure for producing electronic shelf labels according to claim 1, characterized in that: Each B plate (4) has four sets of mold cavities (6) at the bottom, and each set has two mold cavities (6) arranged side by side on the left and right.

6. The two-color molded adhesive structure for producing electronic shelf labels according to claim 5, characterized in that: The bottom of the first hot runner (7) is branched into eight injection channels (8). The eight injection channels (8) correspond one-to-one with the eight mold cavities (6) located inside the mold body (2). The bottom outlet of each injection channel (8) is connected to the side of the mold cavity (6) below it.

7. The two-color molded adhesive structure for producing electronic shelf labels according to claim 6, characterized in that: The bottom of the second hot runner (9) is branched into four jet channels (11), and the four jet channels (11) correspond one-to-one with the four cold runners (10), and the bottom outlet of each jet channel (11) is connected to the cold runner (10) below it.

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