Uniform-flow-velocity double-color injection molding device

Abstract

The utility model discloses a uniform-flow-velocity double-color injection molding device, which belongs to the technical field of injection molding and comprises a bottom die, a top die is arranged at the top of the bottom die, the bottom die and the top die conveniently form an injection molding die, a connecting pipe in an injection molding mechanism is arranged on an injection molding hole, a glue inlet pipe is connected with glue inlet equipment, and liquid plastic can conveniently enter an injection molding pipe through the glue inlet pipe. The injection molding plate enters a conical hole in the bottom end of an injection molding hole through a uniform-speed extrusion hole in the injection molding plate and finally enters a mold cavity between the bottom mold and the top mold, the injection molding plate can be stabilized in the injection molding hole under the limitation of the conical hole, and an extrusion block conveniently moves between the injection molding hole and the interior of an injection molding pipe through a limiting rod to apply pressure to plastic in the injection molding pipe; incomplete injection molding in the mold cavity is avoided, the injection molding effect is improved, meanwhile, residual plastic in the injection molding hole and the injection molding pipe is conveniently cleaned, the injection molding hole is prevented from being blocked, the connecting pipe and the injection molding pipe are in threaded connection, the injection molding pipe is convenient to mount and dismount, and then follow-up cleaning work is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of injection molding technology, and more specifically, to a uniform flow rate two-color injection molding device. Background Technology

[0002] An injection molding machine (or injection molding machine for short) is the main molding equipment used to make various shapes of plastic products from thermoplastic or thermosetting materials using plastic molds. Injection molding is achieved through an injection molding machine and a mold.

[0003] The authorized publication number "CN214056275U" describes "a glue injection structure for a two-color injection mold, including an upper mold base and a lower mold base. A base plate is fixedly connected to the bottom of the lower mold base, and guide rods are evenly fixedly connected to both sides of the lower mold base. Guide sleeves that match the guide rods are evenly fixedly connected to both sides of the upper mold base. The guide rods pass through the guide sleeves and extend upwards. A limit block is provided at the top of the guide rods. The upper mold base has a main glue injection channel one and a main glue injection channel two inside. Movable blocks are slidably arranged inside both main glue injection channels one and two. This utility model allows products to be injected through different flow channels, ensuring the balance of glue injection in the mold. During glue injection, the glue first causes the movable block to move down and squeeze the reset spring one, and then it is discharged from the two main glue injection channels one and two, ensuring that the flow rates of the two main glue injection channels one and two are consistent, further ensuring the balance of glue injection in the mold."

[0004] The aforementioned patent effectively optimizes the injection balance of two-color injection molds. However, the injection channels in the aforementioned patent are too long and lack a glue removal structure, making it difficult to demold the model. At the same time, the channels are easily blocked after the fluid plastic cools down, affecting the production of subsequent models. Utility Model Content

[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a uniform flow rate two-color injection molding device, which aims to solve the problems mentioned in the background art.

[0006] To solve the above problems, the present invention adopts the following technical solution:

[0007] A uniform flow rate two-color injection molding apparatus, comprising:

[0008] A bottom mold, wherein a top mold is provided at the top of the bottom mold, and the top mold has two injection holes; and

[0009] The injection molding mechanism includes two connecting pipes, each of which is fixedly connected to the top of the mold and is connected to a corresponding injection hole. Each connecting pipe has an injection tube threaded onto its outer surface, and each injection tube has a glue inlet pipe connected to its outer wall. One end of each injection hole is connected to a tapered hole. An injection plate is embedded between the inner walls of the injection holes. Multiple uniform speed extrusion holes are equidistantly opened on the outer wall of the injection plate. Two limiting rods are fixedly connected to the outer wall of the injection plate, and an extrusion block is movably sleeved between the outer surfaces of the two limiting rods.

[0010] As a preferred embodiment of this utility model, a support plate is fixedly installed on the top of each injection tube, and an electric push rod is fixedly installed on the top of each support plate. The telescopic end of each electric push rod is fixedly connected to the outer wall of the corresponding extrusion block.

[0011] In a preferred embodiment of this utility model, the inner diameters of the connecting pipe and the injection molding pipe are the same.

[0012] As a preferred embodiment of this utility model, a sealing ring is provided between one end of each connecting pipe and the inner wall of the corresponding injection-molded pipe.

[0013] As a preferred embodiment of this utility model, the bottom mold has an annular boss fixedly connected to its top, and the top mold has an annular groove correspondingly formed at its bottom.

[0014] As a preferred embodiment of this utility model, the bottom mold is fixedly connected to a plurality of guide pillars, and the top mold is provided with a plurality of guide holes.

[0015] Beneficial effects

[0016] Compared with existing technologies, this utility model provides a uniform flow rate two-color injection molding device, which has the following beneficial effects:

[0017] 1. In this design, the bottom mold and top mold are easily assembled into an injection mold. The connecting pipe in the injection mechanism is located on the injection hole. During injection, the injection pipe is connected to the injection equipment, allowing liquid plastic to easily enter the injection tube. The liquid plastic then enters the tapered hole at the bottom of the injection hole through the uniform speed extrusion hole on the injection plate. Under the constraint of the tapered hole, the injection plate can be stably positioned inside the injection hole, and finally enters the mold cavity between the bottom mold and the top mold. The extrusion block moves easily between the injection hole and the injection tube through the limiting rod, applying pressure to the liquid plastic inside to avoid incomplete injection inside the mold cavity, improve the injection effect, and facilitate the cleaning of residual plastic inside the injection hole and injection tube, preventing blockage of the injection hole. The connecting pipe and the injection tube are threadedly connected, facilitating the installation and disassembly of the injection tube, and thus facilitating subsequent cleaning work.

[0018] 2. In this solution, the inner diameters of the connecting pipe and the injection pipe are the same, and the inner diameters of the connecting pipe, the injection pipe, and the injection hole are also the same, which facilitates the injection of liquid plastic. The sealing ring improves the sealing performance between the connecting pipe and the injection pipe, thereby improving the performance of the injection molding mechanism. Attached Figure Description

[0019] Figure 1 This is a perspective view of the present utility model;

[0020] Figure 2 This is a cross-sectional view of the present invention;

[0021] Figure 3 For this utility model Figure 2 Enlarged view of point A in the middle.

[0022] Description of the numbers in the figure:

[0023] 1. Bottom mold; 2. Top mold; 3. Injection mechanism; 301. Connecting pipe; 302. Injection tube; 303. Glue inlet tube; 304. Tapered hole; 305. Injection plate; 306. Uniform speed extrusion hole; 307. Limiting rod; 308. Extrusion block; 4. Support plate; 5. Electric push rod; 6. Sealing ring; 7. Annular boss; 8. Guide post. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] Example:

[0026] Please see Figure 1-3 A uniform flow rate two-color injection molding device, comprising:

[0027] Bottom mold 1, top mold 2 is provided on the top of bottom mold 1, and top mold 2 has two injection holes; and

[0028] Injection molding mechanism 3 includes two connecting pipes 301, each of which is fixedly connected to the top of the top mold 2, and each connecting pipe 301 is connected to the corresponding injection hole. Each connecting pipe 301 has an injection tube 302 threaded on its outer surface, and each injection tube 302 has a glue inlet pipe 303 connected to its outer wall. One end of the injection hole is connected to a tapered hole 304. An injection plate 305 is embedded between the inner walls of the injection hole. Multiple uniform speed extrusion holes 306 are equidistantly opened on the outer wall of the injection plate 305. Two limiting rods 307 are fixedly connected to the outer wall of the injection plate 305, and an extrusion block 308 is movably sleeved between the outer surfaces of the two limiting rods 307.

[0029] In this embodiment, two injection holes facilitate simultaneous injection of two-color plastics. The bottom mold 1 and the top mold 2 easily form an injection mold. The connecting pipe 301 in the injection mechanism 3 is disposed on the injection hole. During injection, the glue inlet pipe 303 is connected to the glue inlet device, allowing liquid plastic to easily enter the injection tube 302 through the glue inlet pipe 303 and then enter the tapered hole 304 at the bottom of the injection hole through the uniform speed extrusion hole 306 on the injection plate 305. Under the constraint of the tapered hole 304, the injection plate 305 can be stably positioned within the injection hole. The extrusion block 308 eventually enters the mold cavity between the bottom mold 1 and the top mold 2. The extrusion block 308 moves between the injection hole and the injection tube 302 via the limiting rod 307, applying pressure to the liquid plastic inside to prevent incomplete injection inside the mold cavity and improve the injection effect. At the same time, it facilitates the cleaning of residual plastic inside the injection hole and the injection tube 302, preventing blockage of the injection hole. The connecting pipe 301 and the injection tube 302 are threaded together, which facilitates the installation and disassembly of the injection tube 302, and thus facilitates subsequent cleaning work.

[0030] Please refer to the specific details. Figure 2-3 As shown, a support plate 4 is fixedly installed on the top of each injection tube 302, and an electric push rod 5 is fixedly installed on the top of each support plate 4. The telescopic end of each electric push rod 5 is fixedly connected to the outer wall of the corresponding extrusion block 308.

[0031] In this embodiment, the installation stability of the electric push rod 5 is improved by the support plate 4. The two electric push rods 5 operate synchronously. The electric push rods 5 are existing technology and will not be described in detail here. The electric push rods 5 facilitate the movement of the extrusion block 308 on the limiting rod 307, thereby improving the ease of use of the injection molding mechanism 3.

[0032] Please refer to the specific details. Figure 2-3 As shown, the inner diameters of the connecting pipe 301 and the injection molding pipe 302 are the same.

[0033] In this embodiment, the inner diameters of the connecting pipe 301 and the injection pipe 302 are the same, and the inner diameters of the connecting pipe 301, the injection pipe 302, and the injection hole are also the same, which facilitates the injection of liquid plastic.

[0034] Please refer to the specific details. Figure 3 As shown, a sealing ring 6 is provided between one end of each connecting pipe 301 and the inner wall of the corresponding injection-molded pipe 302.

[0035] In this embodiment, the sealing ring 6 improves the connection sealing between the connecting pipe 301 and the injection pipe 302, thereby improving the performance of the injection molding mechanism 3.

[0036] Please refer to the specific details. Figure 1-2 As shown, the bottom mold 1 has an annular boss 7 fixedly connected to its top, and the top mold 2 has an annular groove correspondingly opened at its bottom.

[0037] In this embodiment, the connection effect between the bottom mold 1 and the top mold 2 is improved by the cooperation of the annular boss 7 and the annular groove.

[0038] Please refer to the specific details. Figure 1 As shown, the bottom mold 1 has multiple guide pillars 8 fixedly connected to its top, and the top mold 2 has multiple guide holes correspondingly opened on its top.

[0039] In this embodiment, the mold closing effect of the bottom mold 1 and the top mold 2 is improved by the cooperation of the guide post 8 and the guide hole.

[0040] Working principle: During use, the top mold 2 is fitted to the guide post 8 on the bottom mold 1 through the guide hole, so that the annular boss 7 and the annular groove are engaged. The injection tube 303 is connected to the injection equipment. The liquid plastic enters the injection tube 302 through the injection tube 303 and enters the tapered hole 304 at the bottom of the injection hole through the uniform speed extrusion hole 306 on the injection plate 305. Finally, it enters the mold cavity between the bottom mold 1 and the top mold 2. The two electric push rods 5 are activated. The electric push rods 5 push the extrusion block 308 down to pressurize the liquid plastic, so that the plastic inside the injection hole can be completely injected into the mold cavity, completing the injection molding work.

[0041] The control method of this utility model is to control the device by manually starting and stopping the switch. The wiring diagram of the power element and the supply of power are common knowledge in the field. Since this utility model is mainly used to protect mechanical devices, the control method and wiring layout will not be explained in detail.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A uniform flow rate two-color injection molding device, characterized in that, include: A bottom mold (1), wherein a top mold (2) is provided on the top of the bottom mold (1), and the top mold (2) has two injection holes; and The injection molding mechanism (3) includes two connecting pipes (301), each of which is fixedly connected to the top of the top mold (2), and each of which is connected to the corresponding injection hole. Each of which is threaded with an injection tube (302) on the outer surface of the connecting pipe (301), and each of which is connected with a glue inlet pipe (303) on the outer wall of the injection tube (302). One end of the injection hole is connected with a tapered hole (304). An injection plate (305) is embedded between the inner walls of the injection hole. Multiple uniform speed extrusion holes (306) are equidistantly opened on the outer wall of the injection plate (305). Two limiting rods (307) are fixedly connected to the outer wall of the injection plate (305), and an extrusion block (308) is movably sleeved between the outer surfaces of the two limiting rods (307).

2. The uniform flow rate two-color injection molding device according to claim 1, characterized in that: Each injection tube (302) is fixedly mounted with a support plate (4) at its top, and each support plate (4) is fixedly mounted with an electric push rod (5) at its top. The telescopic end of each electric push rod (5) is fixedly connected to the outer wall of the corresponding extrusion block (308).

3. The uniform flow rate two-color injection molding device according to claim 2, characterized in that: The inner diameters of the connecting pipe (301) and the injection molding pipe (302) are the same.

4. The uniform flow rate two-color injection molding device according to claim 3, characterized in that: A sealing ring (6) is provided between one end of each of the connecting pipes (301) and the inner wall of the corresponding injection pipe (302).

5. A uniform flow rate two-color injection molding device according to claim 4, characterized in that: The bottom mold (1) has an annular boss (7) fixedly connected to its top, and the top mold (2) has an annular groove correspondingly opened at its bottom.

6. A uniform flow rate two-color injection molding device according to claim 5, characterized in that: The bottom mold (1) is fixedly connected to a number of guide pillars (8), and the top mold (2) is provided with a number of guide holes.

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