Double-color injection mold

Abstract

The utility model provides a double-color injection mold and an injection molding method thereof, and relates to the field of injection molds, and the double-color injection mold comprises a base, a top plate, a lower mold, an upper mold, an upper mold core, a lower mold core, a cutter assembly, a micro oil cylinder, an ejector rod, a first injection molding channel and a second injection molding channel. Injection molding liquid is injected into an injection molding cavity through a first main injection molding channel and a plurality of first branch injection molding channels, after cooling, a micro oil cylinder drives a first surrounding plate and a second surrounding plate to move downwards to form an injection molding cavity area, and injection molding liquid is injected into the injection molding cavity area through a second main injection molding channel and a plurality of second branch injection molding channels; the injection molding liquid can uniformly and quickly enter the injection molding cavity and the injection cavity, the injection molding time can be shortened, the mold does not need to be opened, the first injection molding channel and the second injection molding channel are arranged in a staggered mode, the mold does not need to be rotated, and double-color injection molding can be completed.

Description

Technical Field

[0001] The present application relates to the field of injection molds, and in particular to a two-color injection mold. Background Art

[0002] A two-color mold is a mold that uses two plastic materials to be molded on the same injection molding machine. The molding process is divided into two steps, but the product is only ejected once. This molding process is also called double-material injection molding. It is usually completed by a set of molds and requires a special two-color injection molding machine. Ordinary two-color injection molding requires a two-color machine. After the first shot is formed, the mold needs to be opened and rotated a certain angle before the second shot is injected. The production cost is high, the cycle is long, and there is a risk of falling when opening the mold midway, impurities floating in, etc., and there is also the problem of displacement of parts in the mold during the current injection molding process. Summary of the invention

[0003] The purpose of the embodiments of the present application is to provide a two-color injection mold that can solve the above-mentioned technical problems.

[0004] The embodiment of the present application provides a two-color injection mold, including a base, a top plate, a lower mold, an upper mold, an upper mold core, a lower mold core, a cutter assembly, a micro-cylinder, a push rod, a first injection channel, and a second injection channel. The push rod is provided in plurality. The lower mold is installed on the base, the upper mold is installed on the lower mold, the lower mold core is installed at the upper end of the lower mold, the upper mold core is installed at the lower end of the upper mold, an injection cavity is provided between the upper mold core and the lower mold core, the cutter assembly includes a first enclosure plate and a second enclosure plate, the end surface of the first enclosure plate and the end surface of the second enclosure plate are both installed in the injection cavity, the micro-cylinder is connected to the first enclosure plate and the second enclosure plate respectively, the upper end of the push rod passes through the lower mold and the lower mold core and extends into the injection cavity, the first injection channel includes a first total injection channel, a plurality of push rods are provided, the lower mold is installed on the base, the upper mold is installed on the lower mold, the lower mold core is installed at the upper end of the upper mold, an injection cavity is provided between the upper mold core and the lower mold core, the cutter assembly includes a first enclosure plate and a second enclosure plate, the end surface of the first enclosure plate and the end surface of the second enclosure plate are both installed in the injection cavity, the micro-cylinder is connected to the first enclosure plate and the second enclosure plate respectively, the upper end of the push rod passes through the lower mold and the lower mold core and extends into the injection cavity, the first injection channel includes a first total injection channel, a plurality of push rods are provided, a first branch injection channel, the second injection channel includes a second main injection channel and a plurality of second branch injection channels, the first main injection channel sequentially passes through the top plate and the upper mold, the lower end of the first main injection channel is communicated with the first branch injection channel, the first branch injection channel passes through the lower mold core and extends into the injection cavity, the second main injection channel transversely passes through the upper mold, the second main injection channel is communicated with the second branch injection channel, the second branch injection channel passes through the upper mold core and extends into the injection cavity, nozzles are respectively provided at the lower ends of the first branch injection channel and the second branch injection channel, the nozzle of the second branch injection channel can abut against the first enclosure plate or the second enclosure plate, fixing grooves are provided on the left and right sides of the base, and fixing holes are provided on the front and rear sides of the base.

[0005] Preferably, a limiting assembly is arranged between the upper mold and the lower mold, and a plurality of limiting assemblies are arranged. The limiting assembly includes a limiting rod, an upper end of the limiting rod is sleeved with an extension piece, the lower end of the limiting rod is fixedly connected to the base, the upper end of the limiting rod passes through the lower mold and the upper mold, and the upper mold is provided with a limiting hole used in conjunction with the extension piece, and the extension piece is arranged in the limiting hole.

[0006] Preferably, a limiting member is provided between the top plate, the upper mold and the lower mold, the upper end of the limiting member is fixedly connected to the top plate, the lower end of the limiting member extends out of the upper mold and the lower mold, and a plurality of limiting members are provided.

[0007] Preferably, irregular protrusions are arranged around the upper end of the lower mold core, and grooves for use with the protrusions are arranged around the lower end of the upper mold core.

[0008] Preferably, four micro-cylinders are provided, and the first enclosure plate and the second enclosure plate are respectively driven to move up and down by two of the micro-cylinders.

[0009] Preferably, the first enclosure side and the second enclosure side are both provided with sliding grooves, and a sliding rod is provided on the base, the lower end of the sliding rod is fixedly connected to the base, and the upper end of the sliding rod passes through the lower mold, and the lower mold core is slidably connected to the sliding groove.

[0010] Preferably, the base, the top plate, the lower mold, the upper mold, the upper mold core, the lower mold core, the cutter assembly, the micro-cylinder, and the push rod are all made of metal.

[0011] Beneficial effects of the utility model:

[0012] The utility model provides a two-color injection mold, comprising a base, a top plate, a lower mold, an upper mold, an upper mold core, a lower mold core, a cutter assembly, a micro-cylinder, a push rod, a first injection channel, and a second injection channel. The push rods are provided in plurality, the lower mold is installed on the base, the upper mold is installed on the lower mold, the lower mold core is installed on the upper end of the lower mold, the upper mold core is installed on the lower end of the upper mold, an injection cavity is provided between the upper mold core and the lower mold core, the cutter assembly comprises a first enclosure plate and a second enclosure plate, the end faces of the first enclosure plate and the end faces of the second enclosure plate are both installed in the injection cavity, The micro-cylinder is connected to the first enclosure plate and the second enclosure plate respectively, the upper end of the ejector rod passes through the lower mold and the lower mold core and extends into the injection cavity, the first injection channel includes a first total injection channel and a plurality of first branch injection channels, the second injection channel includes a second total injection channel and a plurality of second branch injection channels, the first total injection channel passes through the top plate and the upper mold in sequence, the lower end of the first total injection channel is connected to the first branch injection channel, the first branch injection channel passes through the lower mold core and extends into the injection cavity, and the second total injection channel passes through the upper mold transversely The second main injection channel is connected with the second branch injection channel, the second branch injection channel passes through the upper mold core and extends into the injection cavity, the lower ends of the first branch injection channel and the second branch injection channel are respectively provided with nozzles, the nozzles of the second branch injection channel can abut against the first enclosure or the second enclosure, the left and right sides of the base are provided with fixing grooves, and the front and rear sides of the base are provided with fixing holes. When the utility model is in use, the injection liquid is injected into the injection cavity through the first main injection channel and the plurality of first branch injection channels, and after cooling, the first enclosure is driven by the micro-cylinder , the second enclosure moves downward to form an injection cavity area, and the injection liquid is injected into the injection cavity area through the second main injection channel and multiple second branch injection channels to complete the second injection. The utility model can make the injection liquid enter the injection cavity and the injection cavity area evenly and quickly, which can shorten the injection time. The utility model does not need to open the mold, and the first injection channel and the second injection channel of the utility model are staggered. There is no need to rotate the mold to complete two-color injection molding. When in use, the utility model can be fixed to the injection molding equipment through the fixing groove and the fixing hole, which can prevent the two-color injection mold from shaking and shifting during the injection molding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 It is a partial structural schematic diagram of the utility model;

[0016] Figure 3 It is another structural schematic diagram of the utility model;

[0017] Figure 4 It is a cross-sectional view of the utility model;

[0018] Figure 5 It is another cross-sectional view of the present invention.

[0019] The reference numerals are:

[0020] 1. Base; 2. Top plate; 3. Lower mold; 4. Upper mold; 5. Upper mold core; 6. Lower mold core; 7. Cutter assembly; 8. Micro cylinder; 9. Push rod; 10. First injection channel; 11. Second injection channel; 12. Injection cavity; 13. First enclosure; 14. Second enclosure; 15. First general injection channel; 16. First branch injection channel; 17. Second general injection channel; 18. Second branch injection channel; 19. Nozzle; 20. Limit assembly; 21. Limit rod; 22. Extension piece; 23. Limit hole; 24. Limit piece; 25. Bump; 26. Groove; 27. Sliding groove; 28. Sliding rod; 29. ​​Fixing groove; 30. Fixing hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0025] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0026] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0027] like Figure 1-5As shown, a two-color injection mold includes a base 1, a top plate 2, a lower mold 3, an upper mold 4, an upper mold core 5, a lower mold core 6, a cutter assembly 7, a micro-cylinder 8, a push rod 9, a first injection channel 10, and a second injection channel 11. The push rod 9 is provided with a plurality of push rods. The lower mold 3 is installed on the base 1, the upper mold 4 is installed on the lower mold 3, the lower mold core 6 is installed at the upper end of the lower mold 3, the upper mold core 5 is installed at the lower end of the upper mold 4, an injection cavity 12 is provided between the upper mold core 5 and the lower mold core 6, and the cutter assembly 7 includes a first enclosure 13 and a second enclosure 14. The end faces of the first enclosure 13 and the end faces of the second enclosure 14 are both installed in the injection cavity 12. The micro-cylinder 8 is connected to the first enclosure 13 and the second enclosure 14 respectively. The upper end of the ejector rod 9 passes through the lower mold 3 and the lower mold core 6 to extend into the injection cavity 12. The first injection channel 10 includes a first total injection channel 15 and a plurality of first branch injection channels 16. The second injection channel 11 includes a second total injection channel 17 and a plurality of second branch injection channels 18. The first total injection channel 15 passes through the top plate 2 and the upper mold 4 in sequence. The lower end of the first total injection channel 15 is connected to the first branch injection channel 16. The first branch injection channel 16 passes through the lower mold core 6 to extend into the injection cavity 12. The second total injection channel 17 is transversely The second total injection channel 17 penetrates the upper mold 4, and the second branch injection channel 18 is connected. The second branch injection channel 18 penetrates the upper mold core 5 and extends into the injection cavity 12. The lower ends of the first branch injection channel 16 and the second branch injection channel 18 are respectively provided with nozzles 19. The nozzles 19 of the second branch injection channel 18 can abut against the first enclosure 13 or the second enclosure 14. The left and right sides of the base 1 are provided with fixing grooves 29, and the front and rear sides of the base 1 are provided with fixing holes 30. When the utility model is in use, the injection liquid is injected into the injection cavity 12 through the first total injection channel 15 and the plurality of first branch injection channels 16. After cooling, The first enclosure 13 and the second enclosure 14 are driven downward by the micro-cylinder 8 to form an injection cavity area, and the injection liquid is injected into the injection cavity area through the second main injection channel 17 and multiple second branch injection channels 18 to complete the second injection. The utility model can make the injection liquid enter the injection cavity 12 and the injection cavity area evenly and quickly, which can shorten the injection time. In addition, the utility model does not need to open the mold, and the first injection channel 10 and the second injection channel 11 of the utility model are staggered. There is no need to rotate the mold to complete two-color injection molding. When in use, the utility model can be fixed to the injection molding equipment through the fixing groove 29 and the fixing hole 30, which can prevent the two-color injection mold from shaking and shifting during the injection molding process.

[0028] like Figure 2-3As shown, in this embodiment, a limiting assembly 20 is arranged between the upper mold 4 and the lower mold 3, and a plurality of limiting assemblies 20 are arranged. The limiting assembly 20 includes a limiting rod 21, and an extension piece 22 is sleeved on the upper end of the limiting rod 21. The lower end of the limiting rod 21 is fixedly connected to the base 1, and the upper end of the limiting rod 21 passes through the lower mold 3 and the upper mold 4. The upper mold 4 is provided with a limiting hole 23 used in conjunction with the extension piece 22, and the extension piece 22 is arranged in the limiting hole 23. The limiting rod 21 of the utility model is used to limit the upper mold 4 and the lower mold 3. In order to prevent the upper mold 4 from excessive displacement, the upper mold 4 can be further limited by the extension piece 22, thereby improving the accuracy of the buckling of the upper mold 4 and the lower mold 3.

[0029] like Figure 2-3 As shown, in this embodiment, a limiting member 24 is arranged between the top plate 2, the upper mold 4, and the lower mold 3. The upper end of the limiting member 24 is fixedly connected to the top plate 2, and the lower end of the limiting member 24 extends out of the upper mold 4 and the lower mold 3. There are multiple limiting members 24. The limiting members 24 of the utility model further limit the top plate 2, the upper mold 4, and the lower mold 3. During the injection molding process, if the top plate 2, the upper mold 4, and the lower mold 3 are shifted, defective products will appear. The utility model can prevent the displacement between the various components through multiple positioning.

[0030] like Figure 2-5 As shown, in this embodiment, irregular protrusions 25 are arranged around the upper end of the lower mold core 6, and grooves 26 for use with the protrusions 25 are arranged around the lower end of the upper mold core 5. The utility model can accurately position the upper mold core 5 and the lower mold core 6 through the cooperation of the protrusions 25 and the grooves 26, and can prevent the upper mold core 5 and the lower mold core 6 from shifting during the injection molding process.

[0031] like Figure 1-5 As shown, in this embodiment, in order to make the first enclosure 13 and the second enclosure 14 run more smoothly, four micro-cylinders 8 are provided, and the first enclosure 13 and the second enclosure 14 are driven up and down by two of the micro-cylinders 8 respectively.

[0032] like Figure 2-3 As shown, in this embodiment, the side portions of the first enclosure 13 and the side portions of the second enclosure 14 are both provided with sliding grooves 27, and a sliding rod 28 is provided on the base 1. The lower end of the sliding rod 28 is fixedly connected to the base 1, and the upper end of the sliding rod 28 passes through the lower mold 3, the lower mold core 6 and is slidably connected to the sliding groove 27. The sliding rod 28 of the utility model allows the first enclosure 13 and the second enclosure 14 to limit their upward and downward movement, thereby preventing the first enclosure 13 and the second enclosure 14 from moving left and right.

[0033] In this embodiment, in order to extend the service life of the utility model, the base 1, the top plate 2, the lower mold 3, the upper mold 4, the upper mold core 5, the lower mold core 6, the cutter assembly 7, the micro cylinder 8, and the push rod 9 are all made of metal.

[0034] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A two-color injection mold, characterized in that: The invention comprises a base, a top plate, a lower mold, an upper mold, an upper mold core, a lower mold core, a cutter assembly, a micro-oil cylinder, a push rod, a first injection channel, and a second injection channel. A plurality of push rods are provided. The lower mold is installed on the base, the upper mold is installed on the lower mold, the lower mold core is installed on the upper end of the lower mold, the upper mold core is installed on the lower end of the upper mold, an injection cavity is provided between the upper mold core and the lower mold core, the cutter assembly comprises a first enclosure plate and a second enclosure plate, the end surface of the first enclosure plate and the end surface of the second enclosure plate are both installed in the injection cavity, the micro-oil cylinder is respectively connected to the first enclosure plate and the second enclosure plate, the upper end of the push rod passes through the lower mold and the lower mold core and extends into the injection cavity, the first injection channel comprises a first total injection channel, a plurality of first branch injection channels, The second injection channel comprises a second main injection channel and a plurality of second branch injection channels, the first main injection channel sequentially passes through the top plate and the upper mold, the lower end of the first main injection channel is communicated with the first branch injection channel, the first branch injection channel passes through the lower mold core and extends into the injection cavity, the second main injection channel transversely passes through the upper mold, the second main injection channel is communicated with the second branch injection channel, the second branch injection channel passes through the upper mold core and extends into the injection cavity, nozzles are respectively provided at the lower ends of the first branch injection channel and the second branch injection channel, the nozzles of the second branch injection channel can abut against the first enclosure plate or the second enclosure plate, fixing grooves are provided on the left and right sides of the base, and fixing holes are provided on the front and rear sides of the base.

2. A two-color injection mold according to claim 1, characterized in that: A limiting assembly is arranged between the upper mold and the lower mold, and a plurality of limiting assemblies are arranged. The limiting assembly includes a limiting rod, an upper end of the limiting rod is sleeved with an extension piece, a lower end of the limiting rod is fixedly connected to the base, an upper end of the limiting rod passes through the lower mold and the upper mold, and the upper mold is provided with a limiting hole used in conjunction with the extension piece, and the extension piece is arranged in the limiting hole.

3. A two-color injection mold according to claim 1, characterized in that: A limiting member is arranged between the top plate, the upper mold and the lower mold, the upper end of the limiting member is fixedly connected to the top plate, and the lower end of the limiting member extends out of the upper mold and the lower mold, and a plurality of limiting members are arranged.

4. A two-color injection mold according to claim 1, characterized in that: Irregular convex blocks are arranged around the upper end of the lower mold core, and grooves used in conjunction with the convex blocks are arranged around the lower end of the upper mold core.

5. A two-color injection mold according to claim 1, characterized in that: There are four micro-cylinders, and the first enclosure plate and the second enclosure plate are driven to move up and down by two of the micro-cylinders respectively.

6. A two-color injection mold according to claim 5, characterized in that: The first enclosure side and the second enclosure side are both provided with sliding grooves, and a sliding rod is provided on the base. The lower end of the sliding rod is fixedly connected to the base, and the upper end of the sliding rod passes through the lower mold, and the lower mold core is slidably connected to the sliding groove.

7. A two-color injection mold according to claim 1, characterized in that: The base, the top plate, the lower mold, the upper mold, the upper mold core, the lower mold core, the cutter assembly, the micro-cylinder, and the ejector rod are all made of metal.

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