Automatic separation of three-plate mold with open mold gate

Abstract

The utility model provides automatic separation three plate type mould of gate of opening mould, including injection mould upper template, injection mould lower template, water gap board and panel, injection mould upper template and injection mould lower template closing connection, the bottom installation of pouring gate has integrative and has the pouring flow block of cavity, one side of pouring flow block top end installation has one -way exhaust column, the top of one -way exhaust column installs response part, one -way exhaust column one side is provided with the exhaust line of passing through water gap board, one side of pouring flow block bottom end is provided with solenoid valve, the utility model discloses a one -way exhaust column is installed one side of pouring flow block top end, the top of one -way exhaust column installs response part, one -way exhaust column one side is provided with the exhaust line of passing through water gap board, one side of pouring flow block bottom end is provided with solenoid valve, and this can fill the cavity of whole pouring flow block by injecting molten raw material, makes air can be completely discharged, and the better injection of convenient, reduces the mixing of air, ensures the quality of the product of forming.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology and relates to a three-plate mold with automatic gate separation. Background Technology

[0002] Three-plate injection molds typically consist of a mother plate, a stripper plate, and a mold core. The hot nozzle is located inside the stripper plate. The raw material enters the injection channel of the mold core through the injection channel within the mother plate, and then enters the molding cavity through the injection channel of the mold core. Three-plate molds are commonly used to produce parts requiring high precision and complex structures.

[0003] For example, a three-plate injection mold disclosed in patent publication number CN221659967U includes: a female platen, a male platen connected to the bottom of the female platen, and a stripper plate located above the female platen; a female mold core and a male mold core are connected between the female platen and the male platen, and a molding cavity is provided between the female mold core and the male mold core; a sprue groove is provided on the female mold core, and an injection channel communicating with the sprue groove and the molding cavity is provided inside the female mold core; the female platen has a first groove communicating with the sprue groove, and an insert adapted to the first groove is connected to the bottom of the stripper plate; the bottom of the insert has an injection port, which communicates with the sprue groove; a hot nozzle for injection extends from the stripper plate to the insert, and the injection material is injected into the injection port from the hot nozzle. This solution reduces the amount of injection plastic used by lowering the height of the injection head without changing the function of the three-plate injection mold, thus saving energy, reducing consumption, and lowering production costs.

[0004] The aforementioned injection mold has the following drawbacks: the injection material is injected into the sprue through the self-heating nozzle and enters the sprue groove, but the sprue groove has a cavity containing air. When the injected material compresses the air and enters the molding cavity, it causes surface defects in the product. Therefore, we have designed a three-plate mold with automatic gate separation. Summary of the Invention

[0005] The purpose of this invention is to provide a three-plate mold with automatic gate separation for mold opening, so as to solve the problems mentioned in the background art.

[0006] The objective of this utility model can be achieved through the following technical solution: an automatic gate separation three-plate mold, including an upper injection mold, a lower injection mold, a sprue plate, and a panel. The upper and lower injection molds are connected in a closed mold configuration. A gate positioning ring is provided at the top center of the panel. A sprue plate is equipped with a sprue corresponding to the gate positioning ring at its center. An integrally formed sprue block with a cavity is installed at the bottom of the sprue block. A one-way vent is installed on one side of the top of the sprue block. A sensor is installed on the top of the one-way vent, and an vent pipe passing through the sprue plate is provided on one side of the one-way vent. A solenoid valve is provided on one side of the bottom of the sprue block, and a hot runner is installed at the bottom of the solenoid valve.

[0007] In the aforementioned three-plate mold with automatic gate separation, a mold base is provided at the bottom of the lower injection mold plate. The mold base includes a base plate, two square iron parts, and an opening mold plate. This design aims to better separate the lower injection mold plate from the upper injection mold plate, while also providing good support.

[0008] In the aforementioned three-plate mold with automatic gate separation, the top of the upper injection mold plate is bolted to the sprue plate, and the panel is located on top of the sprue plate and connected to the guide post of the upper injection mold plate. This design aims to achieve a good parting effect and position the upper and lower mold plates.

[0009] In the aforementioned three-plate mold with automatic gate separation, a U-shaped positioning plate is installed on one side of the sprue block. The sprue block is positioned on the gate plate by the U-shaped positioning plate, and fastening bolts are installed inside the U-shaped positioning plate. The purpose of this design is to ensure that the sprue block has a good connection with the gate plate, facilitating better separation from the upper injection mold.

[0010] In the aforementioned three-plate mold with automatic gate separation, a flow-diverting solenoid valve body is installed at the runner opening on the other side of the bottom of the casting block, and an auxiliary runner is provided at the bottom of the solenoid valve body. This design allows for flow-diverting casting, facilitating multi-point and multi-position casting of products, and resulting in a smooth transition of the product's surface contour.

[0011] In the aforementioned three-plate mold with automatic gate separation, a heating ring groove is formed on the upper surface of the gating block, following the contour of the gating block. This design allows for the installation of a heating wire, enabling the gating block to be heated and generate heat.

[0012] Compared with the prior art, the advantages of this utility model of an automatic gate separation three-plate mold are as follows: by installing a one-way venting column on one side of the top of the casting block, installing a sensing part on the top of the one-way venting column, and setting an venting pipe through the gate plate on one side of the one-way venting column; and setting a solenoid valve on one side of the bottom of the casting block, the molten material can be injected to fill the cavity of the entire casting block, so that the air can be completely discharged, which facilitates better injection, reduces the mixing of air, and ensures the quality of the molded product. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the three-plate mold with automatic separation of the mold opening and gate of this utility model.

[0014] Figure 2 This is a three-dimensional structural diagram of the three-plate mold casting block with automatic separation of mold opening and gate according to this utility model.

[0015] Figure 3This is a schematic diagram of the auxiliary runner of a three-plate mold with automatic gate separation for mold opening, which is a utility model.

[0016] Figure 4 This is a three-dimensional structural diagram of the U-shaped positioning plate of the three-plate mold with automatic separation of the mold opening gate according to this utility model.

[0017] In the diagram, 1. Upper injection mold plate; 2. Lower injection mold plate; 3. Sprue plate; 4. Panel; 5. Mold base; 6. Sprue positioning ring; 7. Sprue block; 8. Sprue; 9. Heating ring groove; 10. Solenoid valve; 11. Hot runner; 12. One-way vent column; 13. Vent pipe; 14. Sensing unit; 15. Solenoid valve body; 16. Auxiliary runner; 17. U-shaped positioning plate; 18. Fastening bolt. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution of this utility model for an automatic gate separation three-plate mold is as follows: As a first embodiment: the three-plate mold includes an upper injection mold 1, a lower injection mold 2, a sprue plate 3, and a panel 4. The top of the upper injection mold 1 is bolted to the sprue plate 3, and the panel 4 is located on top of the sprue plate 3 and connected to the guide post of the upper injection mold 1. The upper injection mold 1 and the lower injection mold 2 are closed together. A gate positioning ring 6 is provided at the top center of the panel 4, and a sprue gate 8 corresponding to the gate positioning ring 6 is installed at the center of the sprue plate 3. An integrally formed cavity is installed at the bottom of the sprue gate 8. The casting sprue 7 has a one-way venting column 12 installed on one side of its top, and a venting pipe 13 passing through the sprue plate 3 is provided on one side of the one-way venting column 12. A solenoid valve 10 is installed on one side of the bottom of the casting sprue 7, and a hot runner 11 is installed at the bottom of the solenoid valve 10. A sensing element 14 is installed on the top of the one-way venting column 12. The sensing element can be a sensor with electronic sensing effect, possessing a certain degree of high-temperature resistance, and capable of sensing the filling of the casting material in the cavity of the casting sprue 7 and stopping the injection. This scheme fills the entire cavity of the casting sprue 7 with injected molten material, allowing air to be completely expelled, facilitating better injection, reducing air mixing, and ensuring the quality of the molded product. As a second embodiment: Based on the first embodiment, the same structure will not be described again. A mold base 5 is set at the bottom of the injection lower mold plate 2. The mold base 5 includes a base plate, two square iron parts and an opening mold plate. This can better separate the injection lower mold plate 2 from the injection upper mold plate 1, and at the same time play a good supporting role.

[0020] As a third embodiment: the three-plate mold includes an upper injection mold 1, a lower injection mold 2, a sprue plate 3, and a panel 4. The top of the upper injection mold 1 is bolted to the sprue plate 3. The panel 4 is located on top of the sprue plate 3 and is connected to the guide post of the upper injection mold 1. The upper injection mold 1 and the lower injection mold 2 are closed and connected. A gate positioning ring 6 is provided at the top center of the panel 4. A sprue 8 corresponding to the gate positioning ring 6 is installed at the center of the sprue plate 3. An integrally formed sprue block 7 with a cavity is installed at the bottom of the sprue 8. A one-way venting column 12 is installed on one side of the top of the sprue block 7. A vent pipe 13 is provided on one side of the sprue plate 3; a solenoid valve 10 is provided on one side of the bottom of the casting block 7, and a hot runner 11 is installed at the bottom of the solenoid valve 10. A U-shaped positioning plate 17 is installed on one side of the casting block 7, and the casting block 7 is positioned on the sprue plate 3 by the U-shaped positioning plate 17. Fastening bolts 18 are installed inside the U-shaped positioning plate 17, which makes the casting block have a good connection with the sprue plate and facilitates better separation from the injection molding upper mold; a flow-diverting solenoid valve body 15 is installed at the runner opening on the other side of the bottom of the casting block 7, and an auxiliary runner 16 is provided at the bottom of the solenoid valve body 15. This can be used for multi-point and multi-position casting of products, resulting in good transition of the surface contour of the product.

[0021] In this scheme, the cavity volume of the casting block 7 is fixed, and the same volume of injection molding material is injected into the interior of the casting block 7 by the injection molding machine. The sensing part 14 can be set differently.

[0022] As a fourth embodiment: Based on the third embodiment, the same structure will not be described again, but a heating ring groove 9 is formed on the upper surface of the casting block 7, which is arranged along the contour of the casting block 7. A heating wire can be installed so that the casting block 7 can be heated to generate heat.

[0023] Contents not described in detail herein are existing technologies known to those skilled in the art. The specific embodiments described herein are merely illustrative examples illustrating the spirit of this invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this invention or exceeding the scope defined by the appended claims.

Claims

1. A three-plate mold with automatic gate separation, comprising an upper injection mold plate (1), a lower injection mold plate (2), a sprue plate (3), and a panel (4), wherein the upper injection mold plate (1) and the lower injection mold plate (2) are connected in a mold-closing manner, characterized in that, The top center of the panel (4) is provided with a gate positioning ring (6), and the middle of the gate plate (3) is provided with a gate (8) corresponding to the gate positioning ring (6). The bottom of the gate (8) is provided with an integrally formed casting block (7) with a cavity. A one-way exhaust column (12) is provided on one side of the top of the casting block (7). A sensing part (14) is provided on the top of the one-way exhaust column (12). An exhaust pipe (13) passing through the gate plate (3) is provided on one side of the one-way exhaust column (12). A solenoid valve (10) is provided on one side of the bottom of the casting block (7). A hot runner (11) is provided at the bottom of the solenoid valve (10).

2. The three-plate mold with automatic gate separation according to claim 1, characterized in that, The bottom of the injection molding lower template (2) is provided with a mold base (5), which includes a base plate, two square iron parts and an opening template.

3. The three-plate mold with automatic gate separation according to claim 1, characterized in that, The top of the injection molding upper template (1) is connected to the sprue plate (3) by bolts, and the panel (4) is located on the top of the sprue plate (3) and connected to the guide post of the injection molding upper template (1).

4. The three-plate mold with automatic gate separation according to claim 1, characterized in that, A U-shaped positioning plate (17) is installed on one side of the casting block (7). The casting block (7) is positioned on the sprue plate (3) by the U-shaped positioning plate (17). Fastening bolts (18) are installed inside the U-shaped positioning plate (17).

5. The three-plate mold with automatic gate separation according to claim 1, characterized in that, A flow divider solenoid valve body (15) is installed at the flow channel opening on the other side of the bottom end of the casting block (7), and an auxiliary gating channel (16) is provided at the bottom of the solenoid valve body (15).

6. The three-plate mold with automatic gate separation according to claim 1, characterized in that, The upper surface of the casting block (7) is provided with a heating ring groove (9) arranged along the contour of the casting block (7).

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