Die hot runner structure

Abstract

The utility model relates to the field of injection molds, and provides a mold hot runner structure, which is applied to a fixed mold and a mold core in a mold, is used for conveying an injection molding material into an injection molding runner for curing and molding, and comprises a runner nozzle and a heating runner pipe, the pouring gate nozzle is mounted at one end of the fixed mold; the heating runner pipe is mounted in the fixed mold and is communicated with the pouring gate nozzle; and the heating runner pipe penetrates through the mold core, extends towards the injection molding runner and is communicated with the injection molding runner. The injection molding machine has the effect of ensuring the stable molten state of the injection molding material.

Description

TECHNICAL FIELD

[0001] The application relates to the field of injection mold, in particular to a mold hot runner structure. BACKGROUND

[0002] The injection mold is a device for manufacturing plastic parts by using the injection molding process, which has the characteristics of fast production speed, high efficiency, automatic operation and various colors.

[0003] The mold structure also has many problems. For example, in the related art, there is a thin shell plastic workpiece with an arc surface with a rectangular chamfer, and the workpiece has an insertion opening on both sides, and the insertion opening has an arc.

[0004] When the thin shell workpiece is formed by using the mold, in order to match the thickness of the thin shell workpiece, the flow channel interval of the injection molding in the mold is usually narrow, and the material flows slowly during injection, so that some materials are solidified before completely entering the injection flow channel, causing the thin shell workpiece to be blocked or uneven during forming, resulting in surface defects of the thin shell workpiece and affecting the forming quality. SUMMARY

[0005] In order to improve the above problems, the application provides a mold hot runner structure.

[0006] The mold hot runner structure provided by the application adopts the following technical scheme:

[0007] A mold hot runner structure applied to a fixed mold and a mold core in a mold for delivering injection material to an injection runner for solidification and forming, comprising a runner nozzle and a heated flow channel pipe; the runner nozzle is installed at one end of the fixed mold; the heated flow channel pipe is installed in the fixed mold and communicates with the runner nozzle; the heated flow channel pipe extends through the mold core to the injection runner and communicates with the injection runner.

[0008] By adopting the above technical scheme, the runner nozzle is connected with the external injection material delivery pipeline, and the injection material enters the heated flow channel pipe through the runner nozzle, and then enters the injection runner from the heated flow channel pipe, during which the heated flow channel pipe provides heat supply to ensure the stable melting state of the injection material.

[0009] Optionally, the heated flow channel pipe further comprises a flow dividing part; the flow dividing part forms a tapered flow dividing surface, and the injection material flows along the tapered flow dividing surface.

[0010] By adopting the above technical scheme, the flow dividing part can disperse the flowing injection material, play a role of partially mixing the material, and the dispersed material continues to converge below, which can disperse or disperse some agglomerates or not completely melted injection material, and improve the full and uniform melting state of the injection material.

[0011] Optionally, the mold core and the mold are both provided with a spacing groove; the heating runner pipe is located in the spacing groove, and the outer diameter of the heating runner pipe is smaller than the inner diameter of the spacing groove, so that a spacing space for heat insulation is formed between the groove wall of the spacing groove and the heating runner pipe.

[0012] By adopting the above technical scheme, the spacing groove separates the position of the heating runner pipe from the mold core and the mold, so that when the heating runner pipe generates heat, the heat is not directly transmitted to the mold core or the mold through contact, but is transmitted through the generated spacing space, thereby reducing the heat transfer effect of the heat on the mold core or the mold, and reducing the influence of the heat on the mold and the mold core.

[0013] Optionally, the spacing groove is further provided with a positioning portion away from one end of the sprue nozzle; one end of the heating runner pipe is fixedly connected with the sprue nozzle, and the other end is connected with the positioning portion.

[0014] By adopting the above technical scheme, the positioning portion is provided, and the positioning portion cooperates with the sprue nozzle to fix the two ends of the heating runner pipe respectively, so as to ensure the stability of the heating runner pipe.

[0015] Optionally, the positioning portion is provided with a converging port, one end of the converging port is in communication with the heating runner pipe, and the other end is in communication with the injection sprue.

[0016] By adopting the above technical scheme, the converging port can re-converge the injection material dispersed by the diverging portion, so as to avoid the continuous dispersion of the injection material dispersed by the diverging portion.

[0017] Optionally, one end of the converging port near the heating runner pipe is in the shape of an arc-shaped port, and the diverging portion extends into the converging port; and one end of the converging port near the injection sprue is in the shape of an inverted conical port.

[0018] By adopting the above technical scheme, the arc-shaped port can make the dispersed injection material flow uniformly along the arc-shaped surface, and when the diverging portion is located in the converging port, it can ensure that the flowing injection material can accurately enter the converging port, and the conical shape can uniformly diffuse the converged injection material to the injection sprue, so as to ensure that each direction of the injection sprue can be filled with injection material.

[0019] Optionally, the mold is provided with a wiring groove for connecting a power supply line at the position of the sprue nozzle, and a power socket is arranged at the end of the wiring groove.

[0020] By adopting the above technical scheme, the wiring groove can provide arrangement and conveying of the power supply line, the power supply line is connected with the power socket, and after being connected with the power supply through the power socket, the power supply line can convey power to the heating runner pipe, so that the heating runner pipe can stably obtain power supply to generate heat.

[0021] Optionally, the wiring slot is provided with a plurality of wire clamps.

[0022] By using the above technical scheme, the power cord cannot be separated from the wiring slot by using the plurality of wire clamps, and the position of the power cord is fixed.

[0023] In summary, the present application has at least one of the following beneficial technical effects:

[0024] 1. The injection material is added to the injection sprue from the heating sprue mechanism, and the injection sprue is gradually filled with the injection material to form a thin shell product. When the heating sprue mechanism provides flow of the injection material, it provides heating effect to keep the injection material in a molten state, avoiding phenomena such as solidification and clumping of the injection material or uneven distribution of the injection material.

[0025] 2. The sprue nozzle is connected to the external injection material conveying pipeline, and the injection material enters the heating runner pipe through the sprue nozzle, and then enters the injection sprue from the heating runner pipe. During this period, the heating runner pipe provides heat supply to ensure the stability of the molten state of the injection material.

[0026] 3. The function of the shunt part is to disperse the flowing injection material, which plays a role in partially mixing the material. The dispersed material continues to converge below, which can disperse or scatter some clumps or incompletely molten injection material, improving the full and uniform melting state of the injection material.

[0027] 4. The spacing groove separates the position of the heating runner pipe from the mold core and the fixed mold, so that when the heating runner pipe generates heat, it will not directly transmit heat to the mold core or the fixed mold through contact, but will reduce the heat transfer effect of the heat on the mold core or the fixed mold through the generated spacing space, reducing the influence of heat on the fixed mold and the mold core. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a schematic diagram of the mold structure in an embodiment of the present application;

[0029] Figure 2 is a schematic diagram of the partial cross-sectional structure of the mold in some embodiments of the present application;

[0030] Figure 3 is a schematic diagram of the present application Figure 2 A enlarged structure diagram in the embodiment of the present application;

[0031] The marks in the drawings are: 1, fixed mold, 11, spacing groove, 12, wiring slot, 13, wire clamp, 14, power socket, 15, tension slot, 2, movable mold, 3, mold core, 4, injection sprue, 5, heating sprue mechanism, 51, sprue nozzle, 52, heating runner pipe, 53, shunt part, 531, pivot rod, 532, spiral blade, 54, positioning part, 541, convergence port. DETAILED DESCRIPTION

[0032] The advantages and effects of the present application can be easily understood by those skilled in the art from the messages disclosed in the present application. The present application can also be implemented or applied in other different specific embodiments, and the details in the present application can be modified or changed in different views and application systems without departing from the spirit of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0033] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily implement the present application. The present application can be embodied in various different forms, and is not limited to the embodiments described herein.

[0034] In the description of the present application, the expressions of "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" mean that the specific features, structures, materials or characteristics represented in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. Moreover, the specific features, structures, materials or characteristics represented can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples represented in the present application and the features of different embodiments or examples without conflict.

[0035] In addition, the terms "first", "second" are only used to represent the objects, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0036] Throughout the specification, when it is said that a device is "connected" to another device, it not only includes the case of "direct connection", but also includes the case of "indirect connection" in which other elements are placed therebetween. In addition, when it is said that a device "includes" a certain constituent element, unless otherwise specifically stated, other constituent elements are not excluded, but it means that other constituent elements can also be included.

[0037] The embodiments of the present application will be described in detail below with reference to the accompanying drawings, so that those skilled in the art can easily implement the present application. The present application can be embodied in various different forms, and is not limited to the embodiments described herein. Figure 1 - The drawings Figure 3 The present application will be described in further detail.

[0038] The embodiments of the present application disclose a mold hot runner structure.

[0039] A mold hot runner structure,Figure 1 The mold body is shown, and the hot runner structure of the present application is located in the fixed mold 1 of the mold.

[0040] The mold comprises a fixed mold 1 and a movable mold 2, the fixed mold 1 and the movable mold 2 are matched with each other, the fixed mold 1 is internally provided with a mold core 3, and an injection runner 4 for forming a thin-shell product is formed between the mold core 3 and the inner wall of the fixed mold 1. The injection material is a hot-melt product of raw materials required for forming the thin-shell product. After the injection material enters the injection runner 4, it is cooled and solidified to form the thin-shell product.

[0041] The fixed mold 1 is provided with a heated runner mechanism 5, which provides the flow of the injection material. The heated runner mechanism 5 provides the injection material to flow into the injection runner 4. When the injection material flows, the thickness of the thin-shell product is relatively thin, so the interval gap width for forming the injection runner 4 is also relatively narrow. Therefore, the injection material needs a long time to flow. Therefore, when the injection material is located in the heated runner mechanism 5, the heated runner mechanism 5 provides heat supply, so as to reduce the cooling and solidification speed of the injection material, or to maintain the molten state of the injection material, so that the molten state of the injection material can last until the entire injection runner 4 is filled.

[0042] The movable mold 2 is externally provided with a driving mechanism for moving the movable mold 2. The driving mechanism drives the movable mold 2 to move, so as to demold the thin-shell product, thereby achieving the effect of conveniently taking out the formed thin-shell product.

[0043] Specifically, the injection material is added to the injection runner 4 from the heated runner mechanism 5. The injection runner 4 is gradually filled with the injection material to form the thin-shell product. When the heated runner mechanism 5 provides the flow of the injection material, it provides a heating effect, so that the injection material maintains a molten state, avoiding phenomena such as solidification and clumping of the injection material or uneven dispersion of the injection material.

[0044] Further, referring to Figure 2 As shown, the heated runner mechanism 5 comprises a runner nozzle 51 and a heated runner pipe 52. The runner nozzle 51 is installed at one end of the fixed mold 1. The runner nozzle 51 is in the shape of a conical bucket. The middle of the bucket is an opening for feeding. The conical bucket can conveniently hold the injection material. The injection material can flow along the inclined surface of the bucket to the opening. At the same time, it is also convenient to connect the pipeline for externally conveying the injection material.

[0045] The heated runner pipe 52 is installed in the fixed mold 1 and communicates with the runner nozzle 51. The heated runner pipe 52 extends through the mold core 3 to the injection runner 4 and communicates with the injection runner 4. The heated runner pipe 52 can be a combination of a flow pipe and an electric heating pipe. The electric heating pipe is sleeved on the flow pipe. The electric heating pipe can generate heat to heat the flow pipe. The flow pipe is connected to the opening of the runner nozzle 51. The injection material enters the flow pipe from the opening, and then enters the injection runner 4 from the flow pipe. During this period, the electric heating pipe provides heat supply to ensure the stability of the molten state of the injection material.

[0046] Further, referring to Figure 3 The heating runner pipe 52 is further provided with a flow separation part 53, which forms a tapered flow separation surface. The injection material flows along the tapered flow separation surface. The flow separation part 53 can be in the form of a tapered flow separation column. When the injection material moves along the heating runner pipe 52, it will contact the flow separation part 53. After the injection flow contacts the flow separation part 53, it is hindered by the flow separation part 53, and thus disperses and flows along the tapered surface of the flow separation part 53. The flow separation part 53 can disperse the flowing injection material and partially mix the material. The dispersed material continues to converge below, which can disperse or flush some agglomerates or incompletely melted injection material, thereby improving the uniformity of the injection material in the molten state.

[0047] In some embodiments, referring to Figure 3 The heating runner pipe 52 is located in the spacing groove 11, and the outer diameter of the heating runner pipe 52 is smaller than the inner diameter of the spacing groove 11, so that a spacing space for heat insulation is formed between the groove wall of the spacing groove 11 and the heating runner pipe 52. The spacing groove 11 can separate the heating runner pipe 52 from the mold core 3 and the mold 1, so that the heat generated by the heating runner pipe 52 is not directly transmitted to the mold core 3 or the mold 1 by contact, but is transmitted through the spacing space, thereby reducing the heat transfer effect of the mold core 3 or the mold 1 and reducing the influence of heat on the mold 1 and the mold core 3.

[0048] Further, referring to Figure 3 The spacing groove 11 is further provided with a positioning part 54 away from the gate nozzle 51. One end of the heating runner pipe 52 is fixedly connected with the gate nozzle 51, and the other end is connected with the positioning part 54. Since the spacing groove 11 is formed, only the top of the heating runner pipe 52 is connected with the gate nozzle 51. If the injection material is directly transported, the heating runner pipe 52 will swing due to the lack of support at the bottom, which will cause the heating runner pipe 52 to be unable to align with the injection gate 4 and fill the injection material into the spacing groove 11. Therefore, the positioning part 54 is provided to fix the two ends of the heating runner pipe 52 together with the gate nozzle 51, thereby ensuring the stability of the heating runner pipe 52.

[0049] Further, referring to Figure 3 The positioning part 54 is further provided with a converging opening 541, which is in communication with the heating runner pipe 52 at one end and the injection gate 4 at the other end. The converging opening 541 can re-converge the injection material dispersed by the flow separation part 53, thereby avoiding the continuous dispersion of the injection material dispersed by the flow separation part 53.

[0050] Further, the converging port 541 is arc-shaped at one end close to the heating runner pipe 52, and the distribution part 53 extends into the converging port 541. The arc-shaped port can make the dispersed injection material flow along the arc-shaped surface uniformly. When the distribution part 53 is located in the converging port 541, it can ensure that the flowing injection material can accurately enter the converging port 541. The end close to the injection gate 4 is inversely tapered, and the tapered shape can disperse the uniformly converged injection material to the injection gate 4, so as to ensure that each injection gate 4 can be filled with injection material.

[0051] Further, as shown in Figure 1 , the gate nozzle 51 of the fixed mold 1 is provided with a wiring slot 12, the wiring slot 12 is provided with a wire clamp 13, and the end of the wiring slot 12 is provided with a power socket 14.

[0052] The wiring slot 12 can provide arrangement and transportation of the power line. The wire clamp 13 makes the power line unable to separate from the wiring slot 12. The power line is connected with the power socket 14. After the power socket 14 is connected with the power supply, the power line is used to transport power to the heating runner pipe, so that the heating runner pipe obtains power supply and generates heat.

[0053] Further, in order to improve the distribution effect of the distribution part 53 and avoid the agglomeration of the injection material, as shown in Figure 3 , the distribution part 53 can also be provided with a pivot rod 531, and the pivot rod 531 is pivotally connected with a spiral blade 532. The spiral blade 532 can rotate with the pivot rod 531. The spiral blade 532 has no driving source. When the injection material is extruded or transported into the heating runner pipe, it contacts the spiral blade 532, and at the same time, the injection material flows to the injection gate 4. The flowing state makes the spiral blade 532 rotate along the pivot rod 531. In the rotating process, the agglomerated or high-viscosity injection material can be dispersed in the distribution part 53. Since Figure 3 is a sectional view, only half of the spiral blade is shown.

[0054] After the injection molding process is completed, the heating effect of the heating runner pipe is used to liquefy the residual injection material adhered to the spiral blade 532. At the same time, the high-pressure gas flow connected with the gate nozzle 51 is used to cooperate, so that the spiral blade 532 rotates at high speed. The centrifugal force generated by the high-speed rotation separates the residual injection material, so as to avoid the influence of the residual injection material on the rotation effect of the spiral blade 532.

[0055] The embodiments of the specific implementation are the preferred embodiments of the present application, not limited to the protection scope of the present application, wherein the same parts are indicated by the same reference numerals. Therefore: any equivalent changes made according to the structure, shape, principle of the present application should be covered by the protection scope of the present application.

Claims

1. A mold hot runner structure applied to a fixed mold (1) and a mold core (3) in a mold for delivering an injection material to an injection runner (4) to be solidified and molded, characterized in that, The injection molding nozzle (51) is installed at one end of the fixed mold (1), and the heating runner pipe (52) is installed in the fixed mold (1) and communicates with the injection molding nozzle (51); the heating runner pipe (52) extends through the mold core (3) to the injection molding nozzle (4) and communicates with the injection molding nozzle (4).

2. A hot-runner mold structure according to claim 1, wherein The heating runner pipe (52) is further provided with a flow dividing part (53); the flow dividing part (53) forms a tapered flow dividing surface, and the injection material flows along the tapered flow dividing surface.

3. A hot-runner mold structure according to claim 2, wherein The fixed mold (1) and the mold core (3) are both provided with a spacing groove (11); the heating runner pipe (52) is located in the spacing groove (11), and the outer diameter of the heating runner pipe (52) is smaller than the inner diameter of the spacing groove (11), so that a spacing space for heat insulation is formed between the groove wall of the spacing groove (11) and the heating runner pipe (52).

4. A hot-runner mold structure according to claim 3, wherein The spacing groove (11) is further provided with a positioning part (54) away from one end of the injection molding nozzle (51); one end of the heating runner pipe (52) is fixedly connected with the injection molding nozzle (51), and the other end is connected with the positioning part (54).

5. A hot-runner mold structure according to claim 4, wherein The positioning part (54) is provided with a converging port (541); one end of the converging port (541) communicates with the heating runner pipe (52), and the other end communicates with the injection molding nozzle (4).

6. A hot-runner mold structure according to claim 5, wherein The converging port (541) is arc-shaped near one end of the heating runner pipe (52), and the flow dividing part (53) extends into the converging port (541); and the other end is inverted conical.

7. The hot-runner mold structure of claim 1, wherein The fixed mold (1) is provided with a wiring groove (12) for connecting the power supply line at the injection molding nozzle (51), and a power socket (14) is arranged at the end of the wiring groove (12).

8. A hot-runner mold structure according to claim 7, wherein A plurality of wire clamps (13) are arranged on the wiring groove (12).

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