Pin valve hot runner resin inlet mold

Abstract

The utility model discloses a needle valve hot runner glue feeding mould relates to hot runner glue feeding mould technical field, including upper die holder and lower die holder, the top of upper die holder is provided with the mounting groove, the inside of mounting groove is provided with injection molding mechanism, the inside of lower die holder is provided with ejection mechanism, the bottom four corners of upper die holder all are provided with the locating column, the top four corners of lower die holder all are provided with the locating groove, the bottom of locating column is through locating groove and penetrates to the inside of lower die holder. The utility model discloses in the ejection link, with the help of spring reset drive lifting plate drive fixed out pole and eject parts, realize automatic quick unloading, completely get rid of the tediousness of manual manual piece taking, and the production cycle is greatly shortened, and the processing efficiency is significantly improved.

Description

Technical Field

[0001] This utility model relates to the field of hot runner injection mold technology, specifically a needle valve hot runner injection mold. Background Technology

[0002] Needle valve hot runner molds are an advanced and efficient type of mold in the injection molding field. They utilize needle valves at the gate of the hot runner system, employing hydraulic, pneumatic, or spring-driven mechanisms to precisely control the opening and closing of these valves. This allows for precise control of the injection of molten plastic into the mold cavity. The opening and closing time of the gate can be manually adjusted, effectively preventing plastic backflow and stringing, significantly improving product appearance quality, and reducing or even eliminating gate marks. Furthermore, because larger gate sizes can be used, it reduces shear heat and pressure loss in the plastic, accelerating the flow rate of the melt within the mold cavity, thereby shortening the molding cycle and improving production efficiency. It is particularly suitable for processing shear-sensitive plastic materials. In addition, in multi-cavity molds with significant differences in cavity size and shape, needle valve hot runner molds can optimize melt flow in different cavities by controlling the opening and closing time of each gate separately, ensuring high-quality molding results in each cavity. Needle valve hot runner molds are widely used in the production of plastic products with stringent quality and appearance requirements, such as automotive parts, medical devices, and precision electronic components.

[0003] Existing molds rely heavily on manual part removal during the material unloading process. This is not only cumbersome and labor-intensive, but also leads to extended production cycles and fails to meet the demand for efficient processing. Especially in mass production scenarios, the lag in manual part removal significantly reduces overall production efficiency. In addition, improper operation during manual part removal may damage the molded parts, affecting the product qualification rate.

[0004] Based on this, a needle valve hot runner injection mold is now provided, which can eliminate the drawbacks of existing devices. Utility Model Content

[0005] The purpose of this utility model is to provide a needle valve hot runner injection mold to solve the problem that the material discharge process in the background technology relies heavily on manual part removal, which is not only cumbersome and labor-intensive, but also leads to an extended production cycle.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A hot runner injection mold for a needle valve includes an upper mold base and a lower mold base. The top of the upper mold base is provided with a mounting groove, and an injection molding mechanism is provided inside the mounting groove. The lower mold base is equipped with a material discharge mechanism. The upper mold base has positioning pins at the four bottom corners and positioning grooves at the four top corners. The bottom ends of the positioning pins pass through the positioning grooves into the interior of the lower mold base.

[0007] Based on the above technical solutions, this utility model also provides the following optional technical solutions: In one alternative embodiment: the discharge mechanism includes multiple limiting rods, which are fixedly installed inside the lower mold base, and a lifting plate is slidably installed on the outside of the multiple limiting rods, with the lifting plate located inside the lower mold base.

[0008] In one alternative: the top of the lifting plate is provided with fixed rods at equal intervals.

[0009] In one alternative: a positioning hole is provided on the top of the lower mold base and at the corresponding position of the fixed rod, and the top end of the fixed rod passes through the positioning hole through the lower mold base and extends to the outside.

[0010] In one alternative: springs are fitted around the outside of the plurality of limiting rods and below the lifting plate.

[0011] In one alternative: positioning blocks are provided on both sides of the interior of the lower mold base.

[0012] In one alternative: the injection molding mechanism includes a hot runner plate, which is installed inside a mounting groove. A needle valve body is equidistantly embedded in the top of the hot runner plate, and a secondary hot nozzle is provided at the bottom of the hot runner plate and at the corresponding position of the needle valve body.

[0013] In one alternative: a top cover is fixedly mounted on the top of the upper mold base by screws, and an injection tube is provided on the top of the top cover.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. In the material unloading stage, this utility model uses a spring-reset drive lifting plate to push out the parts with a fixed rod, realizing automated and rapid unloading, completely eliminating the tedious manual part removal, greatly shortening the production cycle and significantly improving processing efficiency.

[0015] 2. The positioning pin at the bottom of the upper mold base and the positioning groove at the top of the lower mold base are precisely matched, which can ensure accurate alignment of the upper and lower mold bases when the mold is closed, avoiding the impact of misalignment on the molding quality of the parts. At the same time, the positioning block inside the lower mold base can limit the downward movement distance of the lifting plate, prevent the spring from being over-compressed and damaged, ensure the stable operation of the material discharge mechanism, and extend the overall service life of the mold. Attached Figure Description

[0016] Figure 1This is a schematic diagram of the overall structure of this utility model.

[0017] Figure 2 This is a schematic diagram of the injection molding mechanism of this utility model.

[0018] Figure 3 This is a schematic diagram of the material discharge mechanism of this utility model.

[0019] Figure 4 This is a schematic diagram of the positioning hole structure of this utility model.

[0020] Figure reference numerals: 1. Upper mold base; 2. Lower mold base; 3. Mounting groove; 4. Hot runner plate; 5. Needle valve body; 6. Secondary hot nozzle; 7. Top cover; 8. Injection tube; 9. Positioning pin; 10. Positioning groove; 11. Limiting rod; 12. Lifting plate; 13. Fixed rod; 14. Spring; 15. Positioning block; 16. Positioning hole. Detailed Implementation

[0021] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0022] In one embodiment, such as Figures 1-4 As shown, a hot runner injection mold for a needle valve includes an upper mold base 1 and a lower mold base 2. The top of the upper mold base 1 is provided with an installation groove 3, and an injection molding mechanism is provided inside the installation groove 3. The lower mold base 2 is equipped with a material discharge mechanism inside. The upper mold base 1 is provided with positioning pins 9 at the bottom four corners. The lower mold base 2 is provided with positioning grooves 10 at the top four corners. The bottom end of the positioning pin 9 passes through the positioning grooves 10 into the interior of the lower mold base 2.

[0023] In this embodiment, the mold is injection molded by the injection molding mechanism. The injection liquid enters the groove formed by the upper mold base 1 and the lower mold base 2. The upper mold base 1 moves upward and the ejection mechanism ejects the molded part, which has a fast unloading function. There is no need to manually remove the part, which greatly improves the processing efficiency.

[0024] In one embodiment, such as Figure 3 and Figure 4As shown, the discharge mechanism includes multiple limiting rods 11, which are fixedly installed inside the lower mold base 2. A lifting plate 12 is slidably installed on the outside of the multiple limiting rods 11, and the lifting plate 12 is located inside the lower mold base 2. Fixed discharge rods 13 are equidistantly arranged on the top of the lifting plate 12. A positioning hole 16 is provided on the top of the lower mold base 2 at the corresponding position of the fixed discharge rod 13. The top end of the fixed discharge rod 13 passes through the positioning hole 16, penetrates the lower mold base 2, and extends to the outside. Springs 14 are sleeved on the outside of the multiple limiting rods 11 and below the lifting plate 12. Positioning devices are provided on both sides of the interior of the lower mold base 2. During the downward movement of the upper mold base 1, the bottom end of the positioning pin 9 contacts the top of the lifting plate 12. The upper mold base 1 continues to move downward, and the positioning pin 9 drives the lifting plate 12 to move downward. The spring 14 is compressed. When the upper mold base 1 and the lower mold base 2 are fully in contact, the bottom of the lifting plate 12 contacts the positioning block 15, and the top end of the positioning rod 13 is flush with the positioning hole 16. After injection molding is completed, the upper mold base 1 moves upward. Due to the reset effect of the spring 14, the lifting plate 12 moves upward, and the top end of the positioning rod 13 pushes out the injection-molded part, completing the rapid unloading operation. There is no need for manual removal of the part, which greatly improves work efficiency.

[0025] In one embodiment, such as Figure 1 and Figure 2 As shown, the injection molding mechanism includes a hot runner plate 4, which is installed inside the mounting groove 3. A needle valve body 5 is embedded equidistantly on the top of the hot runner plate 4. A secondary hot runner nozzle 6 is provided at the bottom of the hot runner plate 4 and at the corresponding position of the needle valve body 5. A top cover 7 is fixedly installed on the top of the upper mold base 1 by screws. An injection tube 8 is provided on the top of the top cover 7. The injection molding liquid enters the hot runner inside the hot runner plate 4 through the injection tube 8. The needle valve body 5 controls the opening of the discharge hole of the secondary hot runner nozzle 6. The injection molding liquid flows out through the discharge hole at the bottom of the secondary hot runner nozzle 6 and enters the groove formed by the upper mold base 1 and the lower mold base 2.

[0026] The above embodiment discloses a needle valve hot runner injection mold, wherein, during the downward movement of the upper mold base 1, the bottom end of the positioning pin 9 contacts the top of the lifting plate 12. As the upper mold base 1 continues to move downward, the positioning pin 9 drives the lifting plate 12 to move downward, and the spring 14 is compressed. When the upper mold base 1 and the lower mold base 2 are completely in contact, the bottom of the lifting plate 12 contacts the positioning block 15, and the top end of the positioning rod 13 is flush with the positioning hole 16.

[0027] The injection molding liquid enters the hot runner inside the hot runner plate 4 through the injection tube 8. The needle valve body 5 controls the opening of the discharge hole of the secondary hot nozzle 6. The injection molding liquid flows out through the discharge hole at the bottom of the secondary hot nozzle 6 and enters the groove formed by the upper mold base 1 and the lower mold base 2. After injection molding is completed, the upper mold base 1 moves upward. Due to the reset action of the spring 14, the lifting plate 12 moves upward. The top of the fixed rod 13 pushes out the injection molded part, completing the rapid unloading operation. There is no need for manual removal of the part, which greatly improves work efficiency.

[0028] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A hot runner injection mold for a needle valve, comprising an upper mold base (1) and a lower mold base (2), wherein the top of the upper mold base (1) is provided with an installation groove (3), and an injection molding mechanism is provided inside the installation groove (3); Its features are, The lower mold base (2) is equipped with a material discharge mechanism. The upper mold base (1) is equipped with positioning pins (9) at the bottom four corners. The lower mold base (2) is equipped with positioning grooves (10) at the top four corners. The bottom end of the positioning pin (9) passes through the positioning groove (10) into the interior of the lower mold base (2).

2. The needle valve hot runner injection mold according to claim 1, characterized in that, The discharge mechanism includes multiple limiting rods (11), which are fixedly installed inside the lower mold base (2). A lifting plate (12) is slidably installed on the outside of the multiple limiting rods (11), and the lifting plate (12) is located inside the lower mold base (2).

3. The needle valve hot runner injection mold according to claim 2, characterized in that, The top of the lifting plate (12) is provided with fixed rods (13) at equal intervals.

4. The needle valve hot runner injection mold according to claim 3, characterized in that, A positioning hole (16) is provided at the top of the lower mold base (2) and at the corresponding position of the fixed rod (13). The top end of the fixed rod (13) passes through the positioning hole (16) through the lower mold base (2) and extends to the outside.

5. A needle valve hot runner injection mold according to claim 4, characterized in that, Springs (14) are fitted around the outside of the plurality of limiting rods (11) and below the lifting plate (12).

6. The needle valve hot runner injection mold according to claim 1, characterized in that, Positioning blocks (15) are provided on both sides of the interior of the lower mold base (2).

7. The needle valve hot runner injection mold according to claim 1, characterized in that, The injection molding mechanism includes a hot runner plate (4), which is installed inside the mounting groove (3). A needle valve body (5) is embedded at equal intervals on the top of the hot runner plate (4), and a secondary hot nozzle (6) is provided at the bottom of the hot runner plate (4) and at the corresponding position of the needle valve body (5).

8. A needle valve hot runner injection mold according to claim 1, characterized in that, The top of the upper mold base (1) is fixedly installed with a top cover (7) by screws, and an injection tube (8) is provided on the top of the top cover (7).

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