Micro-foaming injection molding mold

Abstract

The utility model discloses a micro-foaming injection molding mold, and particularly relates to the technical field of molds, the micro-foaming injection molding mold comprises a mold main body adopting micro-foaming injection molding, and a pipeline assembly used for feeding is arranged outside the mold main body; the pipeline assembly comprises a mounting pipe arranged at the top of the mold body, a mounting ring hole is formed in the mounting pipe, a heat conduction ring and an electric heating ring are mounted in the mounting ring hole, and the heat conduction ring is sleeved with the electric heating ring. The electric heating ring is matched with the heat conduction ring, so that the material pipe and materials in the material pipe can be preheated and heated, the effects of reducing the viscosity of the materials and increasing the fluidity are achieved, the situation that the conveying efficiency of the materials is affected due to material blockage is prevented, the subsequent injection molding efficiency of the mold body on the materials can be improved through preheating treatment on the materials, and the production cost is reduced. Therefore, the practicability of the device can be improved, meanwhile, real-time operation can be carried out, and the machining efficiency can be effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and more specifically to a micro-foam injection molding mold. Background Art

[0002] The basic principle of the micro-foam injection molding process is to dissolve a supercritical fluid (such as CO2 or N2) into the molten plastic to form a single-phase solution. When this solution enters the mold cavity, due to the changes in temperature and pressure, a large number of tiny bubble nuclei will be formed inside the product. These bubble nuclei gradually grow and finally generate a product with a microporous structure.

[0003] Micro-foam injection molding is an advanced precision injection technology that can significantly reduce the weight of the workpiece, shorten the molding cycle, and improve warpage deformation and dimensional stability. As shown in the prior art with the publication number CN220280293U, although this prior art can facilitate the dredging of the injection hole through an anti-blocking structure, when cleaning the injection hole, the bolt is screwed out from the inside of the screw hole. At this time, the fixing between the fixed ear and the limiting groove is released, and then the first half pipe and the second half pipe can be pulled out from the inside of the jack. Then, hold the second half pipe and pull the first half pipe. At this time, the first half pipe drives the slider to slide out from the inside of the chute. Subsequently, the first half pipe and the second half pipe are separated, and then it is more convenient to clean the blockage between the first half pipe and the second half pipe. However, this prior art can only be operated during the shutdown of the equipment, which will affect the injection efficiency of the equipment.

[0004] In addition, the disassembly and assembly steps of the first half pipe and the second half pipe in the above technical solution are relatively cumbersome, which will affect the disassembly and assembly efficiency and maintenance efficiency of the staff. Summary of the Utility Model

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a micro-foam injection molding mold. Through the cooperation of an electric heating coil and a heat conduction ring, the material pipe and the material inside it can be preheated and heated up to achieve the effect of reducing the viscosity of the material and increasing its fluidity, preventing the material from being blocked and affecting the conveying efficiency of the material. At the same time, it can also perform real-time operation, thereby effectively improving the processing efficiency to solve the problems presented in the above background art.

[0006] To achieve the above object, the utility model provides the following technical solution: A micro-foam injection molding mold, including a mold body using micro-foam injection molding, and a pipeline assembly for feeding is arranged outside the mold body;

[0007] The pipeline assembly includes an installation pipe arranged at the top of the mold body. An installation ring hole is opened inside the installation pipe, and a heat conduction ring and an electric heating coil are installed inside the installation ring hole. The electric heating coil is sleeved outside the heat conduction ring;

[0008] Inside the installation pipe, there is a material pipe, and the bottom end of the material pipe extends into the mold body.

[0009] In a preferred embodiment, the mold body includes an upper mold and a lower mold. The upper mold is arranged on the top of the lower mold; the installation pipe is arranged on the top of the upper mold, and the bottom end of the material pipe extends into the upper mold. By using the upper mold and the lower mold in cooperation, it is convenient to perform injection molding operations on the material.

[0010] In a preferred embodiment, internal threads are machined inside the top end of the installation pipe, and external threads that engage with the internal threads are machined outside the top end of the material pipe. The material pipe is threadedly connected to the installation pipe. Through the internal threads on the installation pipe and the external threads on the material pipe, the material pipe can be threadedly connected to the installation pipe, which facilitates the disassembly and assembly operations of the material pipe by the staff, thereby improving the convenience for the staff to repair and maintain the material pipe.

[0011] In a preferred embodiment, a fixing member is sleeved outside the bottom end of the installation pipe. The fixing member is arranged on the top of the upper mold, and fixing holes are provided at the four corners of the fixing member. Through the multiple fixing holes on the fixing member, the staff can install the fixing member on the upper mold with the help of fastening bolts, thereby ensuring the connection stability between the installation pipe and the upper mold and avoiding the situation of loosening and separation.

[0012] In a preferred embodiment, on one side of the fixing member corresponding to the fixing hole at the top, there is a fastening bolt. The bottom end of the fastening bolt extends into the upper mold, and the fastening bolt is threadedly connected to the upper mold. Through the threaded connection between the fastening bolt and the upper mold, the connection tightness and stability between the fixing member and the upper mold can be ensured.

[0013] In a preferred embodiment, positioning grooves are provided at the four corners of the top of the lower mold, and positioning members are arranged inside the positioning grooves. The top ends of the positioning members are fixed to the bottom of the upper mold. Through the nested connection between the positioning members and the positioning grooves, the stability and accuracy of the upper mold during up and down movement can be ensured, and the situation of the upper mold shifting and misaligning during movement can be avoided.

[0014] Technical effects and advantages of the present utility model:

[0015] Through the cooperation of the electric heating coil and the heat conduction ring, the material pipe and the material inside it can be preheated and heated up, achieving the effect of reducing the viscosity of the material and increasing its fluidity, preventing the material from being blocked and affecting the conveying efficiency of the material. The preheating treatment of the material can improve the injection molding efficiency of the mold body for the material subsequently, thereby improving the practicality of the present utility model. At the same time, real-time operation can be carried out, effectively improving the processing efficiency. Description of the drawings

[0016] Figure 1Schematic diagram of the overall structure of the present utility model;

[0017] Figure 2 Exploded view of the upper mold of the present utility model;

[0018] Figure 3 Front view of the upper mold of the present utility model;

[0019] Figure 4 Cross-sectional view of the installation pipe of the present utility model;

[0020] Figure 5 Cross-sectional view of the installation ring cavity of the present utility model.

[0021] Reference numerals are: 1, installation pipe; 2, installation ring cavity; 3, positioning member; 4, heat conduction ring; 5, electric heating coil; 6, material pipe; 7, upper mold; 8, lower mold; 9, internal thread; 10, external thread; 11, fixing member; 12, fixing hole; 13, fastening bolt; 14, positioning groove. Specific embodiments

[0022] 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 scope of protection of the present utility model.

[0023] Referring to the attached drawings of the specification Figures 1-5 , the present utility model provides a micro-foam injection molding die, including a die body for micro-foam injection molding, and a pipeline assembly for feeding is arranged outside the die body;

[0024] As Figure 4 and 5 shown, the pipeline assembly includes an installation pipe 1 arranged at the top of the die body, an installation ring hole 2 is opened inside the installation pipe 1, a heat conduction ring 4 and an electric heating coil 5 are installed inside the installation ring hole 2, and the electric heating coil 5 is sleeved outside the heat conduction ring 4; a material pipe 6 is arranged inside the installation pipe 1, and the bottom end of the material pipe 6 extends into the die body.

[0025] As Figures 1-3 shown, the die body includes an upper mold 7 and a lower mold 8, and the upper mold 7 is arranged on the top of the lower mold 8; the installation pipe 1 is arranged on the top of the upper mold 7, and the bottom end of the material pipe 6 extends into the upper mold 7. By using the upper mold 7 and the lower mold 8 in cooperation, it is convenient to perform injection molding operations on the material.

[0026] As Figure 4 and 5As shown, an internal thread 9 is machined inside the top end of the mounting pipe 1, and an external thread 10 that engages with the internal thread 9 is machined outside the top end of the material pipe 6. The material pipe 6 is threadedly connected to the mounting pipe 1. Through the internal thread 9 on the mounting pipe 1 and the external thread 10 on the material pipe 6, the material pipe 6 can be threadedly connected to the mounting pipe 1, thereby facilitating the disassembly and assembly operations of the material pipe 6 by the staff, and thus improving the convenience for the staff to repair and maintain the material pipe 6.

[0027] As Figures 1-5 shown, a fixing member 11 is sleeved outside the bottom end of the mounting pipe 1. The fixing member 11 is provided on the top of the upper mold 7. Fixing holes 12 are opened at the four corners of the fixing member 11. Through the multiple fixing holes 12 on the fixing member 11, the staff can install the fixing member 11 on the upper mold 7 by means of fastening bolts 13, thereby ensuring the connection stability between the mounting pipe 1 and the upper mold 7 and avoiding the situation of loosening and separation. A fastening bolt 13 is provided on one side of the fixing member 11 corresponding to the fixing hole 12 at the top. The bottom end of the fastening bolt 13 extends into the upper mold 7, and the fastening bolt 13 is threadedly connected to the upper mold 7. Through the threaded connection between the fastening bolt 13 and the upper mold 7, the connection tightness and stability between the fixing member 11 and the upper mold 7 can be ensured.

[0028] As Figure 2 shown, positioning grooves 14 are opened at the four corners of the top of the lower mold 8. A positioning member 3 is provided inside the positioning grooves 14, and the top end of the positioning member 3 is fixed to the bottom of the upper mold 7. Through the nested connection between the positioning member 3 and the positioning grooves 14, the stability and accuracy of the upper mold 7 during the up and down movement can be ensured, and the situation of the upper mold 7 shifting and misaligning during the movement can be avoided.

[0029] First, the staff starts the electric heating coil 5 to heat the heat conducting ring 4, and the heat conducting ring 4 then conducts the heat to the material pipe 6, so as to preheat and warm up the material pipe 6. When the material pipe 6 conveys the material between the upper mold 7 and the lower mold 8, the heated material pipe 6 can increase the temperature of the material, reduce the viscosity of the material and increase the fluidity, prevent the material from being blocked and affect the conveying efficiency of the material, and can simultaneously preheat the material and improve the molding efficiency of the subsequent mold body for the material.

[0030] Finally: The above are only the preferred embodiments of the present invention and are not used to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A micro-foam injection molding mold, characterized in that: It comprises a mold body formed by micro-foam injection molding, and a pipeline assembly for feeding is arranged outside the mold body; The pipeline assembly comprises a mounting tube (1) arranged on the top of the mold body, a mounting ring hole (2) is provided inside the mounting tube (1), a heat conducting ring (4) and an electric heating ring (5) are installed inside the mounting ring hole (2), and the electric heating ring (5) is sleeved on the outside of the heat conducting ring (4); A material pipe (6) is provided inside the installation pipe (1), and the bottom end of the material pipe (6) extends into the interior of the mold body.

2. A micro-foam injection molding mold according to claim 1, characterized in that: The mold body comprises an upper mold (7) and a lower mold (8), wherein the upper mold (7) is arranged on the top of the lower mold (8); The mounting tube (1) is arranged on the top of the upper mold (7), and the bottom end of the material tube (6) extends to the inside of the upper mold (7).

3. The micro-foam injection molding mold according to claim 1, characterized in that: The top end of the installation tube (1) is internally processed with an internal thread (9), the top end of the material tube (6) is externally processed with an external thread (10) engaged with the internal thread (9), and the material tube (6) is threadedly connected to the installation tube (1).

4. The micro-foam injection molding mold according to claim 1, characterized in that: A fixing piece (11) is sleeved on the outside of the bottom end of the installation tube (1), and the fixing piece (11) is arranged on the top of the upper mold (7). Fixing holes (12) are provided at four corners of the fixing piece (11).

5. The micro-foam injection molding mold according to claim 4, characterized in that: A fastening bolt (13) is provided on one side of the top of the fixing member (11) corresponding to the fixing hole (12), the bottom end of the fastening bolt (13) extends into the interior of the upper mold (7), and the fastening bolt (13) is threadedly connected to the upper mold (7).

6. The micro-foam injection molding mold according to claim 2, characterized in that: The four corners of the top of the lower mold (8) are each provided with a positioning groove (14), a positioning piece (3) is provided inside the positioning groove (14), and the top end of the positioning piece (3) is fixed to the bottom of the upper mold (7).

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