High-precision injection mold for medical sampling bucket

Abstract

This utility model belongs to the field of injection molds, specifically relating to a high-precision injection mold for a medical sampling bucket, including a fixed mold plate and a moving mold plate. A sprue is provided on the fixed mold plate, and a fixed mold frame is provided below the fixed mold plate. A mold foot, an ejector base plate, and an ejector panel are provided on the moving mold plate. The moving mold frame is provided on the mold foot, and a sampling bucket cavity is provided between the moving mold frame and the fixed mold frame. A hot runner system is provided on the sampling bucket cavity. The hot runner system includes a hot runner support frame and a hot runner plate between the fixed mold plate and the fixed mold frame. A hot runner is provided in the hot runner plate, connecting to the sprue. A hot nozzle is connected below the hot runner, and the hot nozzle connects to the sampling bucket cavity. A cavity is provided in the fixed mold plate, with a pressure plate on the cavity and a piston inside. A stopper pin is connected below the piston, passing through the hot runner and engaging with the discharge hole of the hot nozzle. A cooling system is provided around the periphery of the sampling bucket cavity, and an ejection mechanism is provided on the ejector base plate and ejector panel.

Description

Technical Field

[0001] This utility model belongs to the field of injection mold technology, specifically relating to a high-precision injection mold for a medical sampling container. Background Technology

[0002] Plastic medical sampling containers (frames) are specialized instruments used in the medical field to standardize sampling procedures. They must meet stringent medical and hygiene requirements in terms of material selection, structural design, and functional implementation. Currently, they are mainly made of materials such as PP or ABS and are processed using injection molds. Traditional medical sampling containers, due to limitations in the injection molding process (such as flow marks, weld lines, and shrinkage), mostly use cold flow injection filling. After molding, the surface of the product cannot meet the usage standards, requiring an additional non-porous smoothing process to avoid microbial residue. Therefore, they suffer from disadvantages such as high processing costs, numerous processes, long production cycles, and high loss rates. Utility Model Content

[0003] The purpose of this invention is to solve the problems existing in the background art mentioned above, and to provide a high-precision injection mold for medical sampling buckets. It has a double cavity in one mold, high production efficiency, and the surface of the product after molding is smooth and without marks. It can meet the usage standards without additional processing, saving costs and reducing losses.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] A high-precision injection mold for a medical sampling container includes a fixed mold plate and a moving mold plate. The fixed mold plate has a sprue and a fixed mold frame below it. The moving mold plate has two mold feet, with an ejector base plate and an ejector face plate between them. The moving mold frame is mounted on the two mold feet, and a sampling container cavity is formed between the moving mold frame and the fixed mold frame. A hot runner system is provided on the sampling container cavity, including a heat exchanger between the fixed mold plate and the fixed mold frame. The hot runner support frame is equipped with a hot runner plate, and a hot runner is set in the hot runner plate. The hot runner is connected to the inlet, and a hot nozzle is connected to the bottom of the hot runner. The hot nozzle is connected to the sampling barrel mold cavity. A cavity is set in the fixed mold plate, and a pressure plate is set on the cavity. A piston is set in the cavity, and a plug pin is connected to the bottom of the piston. The plug pin passes through the hot runner and cooperates with the discharge hole of the hot nozzle. A cooling system is set around the periphery of the sampling barrel mold cavity. An ejection mechanism is set on the ejector pin base plate and ejector pin panel.

[0006] Furthermore, the cooling system includes uniformly distributed cooling water holes along the periphery of the sampling barrel cavity in the fixed mold frame, and longitudinal and transverse water holes along the periphery of the sampling barrel cavity in the moving mold frame. The longitudinal and transverse water holes are connected, and the cooling water holes, longitudinal water holes, and transverse water holes are connected to an external cooling water source.

[0007] Furthermore, the sampling barrel cavity comprises a main cavity and an edge cavity, and the ejection mechanism includes an ejection module located in the moving mold frame of the edge cavity. An ejector rod is connected to the ejector base plate and the ejector panel, and the ejector rod is connected to the ejection module.

[0008] Furthermore, two sampling barrel cavities are provided between the moving mold frame and the fixed mold frame.

[0009] Furthermore, a heating nozzle sleeve is provided in the fixed mold frame located outside the heating nozzle, and a heating coil is provided in the heating nozzle sleeve.

[0010] Furthermore, heating tubes are provided on the hot runner plate.

[0011] Furthermore, a guide post is provided between the moving mold plate and the moving mold frame. The guide post passes through the ejector pin base plate and the ejector pin panel, and a return spring is provided on the guide post between the ejector pin panel and the bottom surface of the moving mold frame.

[0012] Furthermore, a heat insulation plate is provided on the fixed mold plate.

[0013] The high-precision injection mold for the medical sampling container of this utility model has the following advantages:

[0014] The hot runner injection system allows for precise temperature control of the injection material, especially for plastic raw materials such as PP or ABS. This effectively prevents the plastic material from solidifying upon cooling and avoids vaporization due to excessive temperature, keeping the plastic material in a molten state for rapid injection into the mold cavity of the sampling barrel. This reduces flow marks and weld lines. Simultaneously, the cooling system rapidly cools and sets the molded product, reducing cooling time and improving energy efficiency. Furthermore, this instant hot-and-cold injection molding process achieves a high-gloss, flawless surface finish, eliminating the need for additional smoothing processes to meet usage standards, reducing process and product waste, and increasing production efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the high-precision injection mold structure of the medical sampling bucket of this utility model;

[0016] Figure 2 This is a schematic diagram of the hot runner system of this utility model;

[0017] Figure 3 This is a schematic diagram of the ejection mechanism of this utility model;

[0018] Figure 4 This is a three-dimensional schematic diagram of the high-precision injection mold for the medical sampling bucket of this utility model. Detailed Implementation

[0019] The present invention will be described in detail below with reference to specific implementation examples. The following implementation examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any way.

[0020] In the description of this patent, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this patent.

[0021] This utility model relates to a high-precision injection mold for a medical sampling container, such as... Figure 1 — Figure 4 As shown, the system includes a fixed mold plate 1 and a moving mold plate 2. A sprue 4 is provided on the fixed mold plate, and a fixed mold frame 3 is located below it. Two mold feet 5 are provided on the moving mold plate 2, with an ejector base plate 6 and an ejector face plate 7 between them. A moving mold frame 8 is provided on the two mold feet, and a sampling cylinder cavity 9 is located between the moving mold frame 8 and the fixed mold frame 3. A hot runner system is provided on the sampling cylinder cavity 9. The hot runner system includes a hot runner support frame 10 between the fixed mold plate 1 and the fixed mold frame 3, and a hot runner... A hot runner plate 11 is provided with a hot runner 12, which is connected to the inlet 4. A hot nozzle 13 is connected to the bottom of the hot runner 12, and the hot nozzle 13 is connected to the sampling barrel cavity 9. A cavity 15 is provided in the fixed mold plate 1, and a pressure plate 14 is provided on the cavity. A piston 16 is provided in the cavity, and a stopper 17 is connected to the bottom of the piston. The stopper passes through the hot runner 12 and cooperates with the discharge hole 18 of the hot nozzle 13. A cooling system is provided around the periphery of the sampling barrel cavity 9. An ejection mechanism is provided on the ejector base plate 6 and the ejector panel 7.

[0022] The cavity 15 is filled with high-pressure gas (or high-pressure liquid). The high-pressure gas drives the piston to move up and down. During injection molding, the mold closes, and the molten plastic material is injected from the inlet 4, then enters the hot runner 12, and then flows into the hot nozzle 13. At this time, the piston 16 drives the stopper pin 17 away from the discharge hole 18, so that the molten plastic material is injected into the sampling barrel cavity 9 through the discharge hole 18 of the hot nozzle 13, filling the sampling barrel cavity 9. After filling, the piston 16 drives the stopper pin 17 to descend and block the discharge hole 18, and no more material is discharged. A pressure space is formed in the sampling barrel cavity 9, which holds the filled plastic material under pressure and shapes it. At the same time, under the action of the cooling system, the plastic material cools and solidifies faster, and finally the molded product (sampling barrel 01) is obtained. Finally, the mold opens, and the ejector mechanism automatically ejects the sampling barrel 01 out of the mold, and the injection molding is completed. In this design, molten plastic raw material is first injected into the sampling barrel mold cavity through a hot runner and a hot nozzle. The hot nozzle has a built-in heating and insulation structure, which can heat or keep the molten plastic raw material at a relatively high temperature during the injection process. This effectively reduces flow marks and weld lines during injection and filling. By using a plug needle for plugging, the filling amount can be precisely controlled. At the same time, the cooling system can accelerate the cooling and shaping of the product. Through the principle of instant heating and cooling, the surface of the product is made high-gloss and flawless. After the product is formed, no further smoothing treatment is required, and it can meet the usage standards of medical sampling barrels. This reduces processes and product waste and improves production efficiency.

[0023] Furthermore, the cooling system includes uniformly distributed fixed mold cooling water holes 20 along the periphery of the sampling barrel cavity 9 in the fixed mold frame 3, and longitudinal water holes 21 and transverse water holes 22 along the periphery of the sampling barrel cavity 9 in the moving mold frame 8. The longitudinal water holes 21 and transverse water holes 22 are connected, and the cooling water holes 20, longitudinal water holes 21, and transverse water holes 22 are connected to an external cooling water source. The uniform distribution of the fixed mold cooling water holes 20, longitudinal water holes 21, and transverse water holes 22 around the periphery of the cavity 9 enables rapid cooling and shaping of the sampling barrel. The external cooling water source for each cooling water hole allows for the circulation of cooling water, ensuring the cooling effect.

[0024] Furthermore, the sampling barrel cavity 9 comprises a main cavity 90 and an edge cavity 91. The ejection mechanism includes an ejection module 92 located in the moving mold frame 8 of the edge cavity 91. An ejector rod 93 is connected to the ejector base plate 6 and the ejector panel 7. The ejector rod 93 is connected to the ejection module 92. The main body of the sampling barrel is formed in the main cavity 90, and the edge (handle) of the sampling barrel is formed in the edge cavity 91. The ejection module 92 contacts the edge of the sampling barrel, and the ejector base plate and the ejector panel drive the ejection module through the ejector rod to eject the formed sampling barrel 01 out of the mold, realizing automatic demolding. The ejection module 92 is pressed on the edge, which can reduce the impact on the main body of the sampling barrel and reduce ejection marks.

[0025] Furthermore, two sampling barrel cavities 9 are provided between the moving mold frame 8 and the fixed mold frame 3, forming a single mold with two cavities, resulting in high production efficiency.

[0026] Furthermore, a hot nozzle sleeve 30 is provided in the fixed mold frame 3 located outside the hot nozzle 13, and a heating coil 31 is provided in the hot nozzle sleeve. The heating coil can heat the plastic material inside the hot nozzle to prevent the plastic material from cooling and solidifying.

[0027] Furthermore, a heating tube 32 is provided on the hot runner plate 11, and the heating tube can be connected to a temperature controller to precisely control the heating temperature.

[0028] Furthermore, a guide post 33 is provided between the moving mold plate 2 and the moving mold frame 8. The guide post 33 passes through the ejector base plate 6 and the ejector panel 7, and a reset spring 35 is provided on the guide post 33 between the ejector panel 7 and the bottom surface of the moving mold frame 8. The reset spring can automatically reset the ejector base plate 6 and the ejector panel 7 after they are ejected.

[0029] Furthermore, a heat insulation plate 36 is provided on the fixed mold plate 1, which can reduce heat dissipation and improve the heating effect.

[0030] The above description is merely a preferred embodiment and the technical principles employed in this patent. Those skilled in the art will understand that this patent is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of this patent. Therefore, although this patent has been described in detail through the above embodiments, this patent is not limited to the above embodiments. Many other equivalent embodiments may be included without departing from the concept of this patent, and the scope of this patent is determined by the scope of the appended claims.

Claims

1. A high-precision injection mold for a medical sampling container, characterized in that: The system includes a fixed mold plate (1) and a moving mold plate (2). A sprue (4) is provided on the fixed mold plate. A fixed mold frame (3) is provided below the fixed mold plate. Two mold feet (5) are provided on the moving mold plate (2). An ejector base plate (6) and an ejector panel (7) are provided between the two mold feet. A moving mold frame (8) is provided on the two mold feet. A sampling barrel cavity (9) is provided between the moving mold frame (8) and the fixed mold frame (3). A hot runner system is provided on the sampling barrel cavity (9). The hot runner system includes a hot runner support frame (10) provided between the fixed mold plate (1) and the fixed mold frame (3). A hot runner plate (11) is provided in the hot runner support frame. A hot runner (12) is provided in the hot runner plate (11), the hot runner (12) is connected to the inlet (4), the hot runner (12) is connected to the hot nozzle (13), the hot nozzle (13) is connected to the sampling barrel cavity (9), the fixed mold plate (1) is provided with a cavity (15), the cavity is provided with a pressure plate (14), the cavity is provided with a piston (16), the piston is connected with a plug needle (17), the plug needle passes through the hot runner (12) and cooperates with the discharge hole (18) of the hot nozzle (13), the periphery of the sampling barrel cavity (9) is provided with a cooling system, and the ejector base plate (6) and ejector panel (7) are provided with an ejection mechanism.

2. The high-precision injection mold for the medical sampling container as described in claim 1, characterized in that... The cooling system includes uniformly distributed fixed mold cooling water holes (20) in the fixed mold frame (3) along the periphery of the sampling barrel mold cavity (9), and longitudinal water holes (21) and transverse water holes (22) in the moving mold frame (8) along the periphery of the sampling barrel mold cavity (9). The longitudinal water holes (21) and transverse water holes (22) are connected, and the cooling water holes (20), longitudinal water holes (21) and transverse water holes (22) are connected to external cooling water sources.

3. The high-precision injection mold for the medical sampling container as described in claim 1, characterized in that... The sampling barrel cavity (9) consists of a main cavity (90) and an edge cavity (91). The ejection mechanism includes an ejection module (92) in the moving mold frame (8) located in the edge cavity (91). An ejector rod (93) is connected to the ejector base plate (6) and the ejector panel (7). The ejector rod (93) is connected to the ejection module (92).

4. The high-precision injection mold for the medical sampling container as described in claim 1, characterized in that... Two sampling barrel cavities (9) are provided between the moving mold frame (8) and the fixed mold frame (3).

5. The high-precision injection mold for the medical sampling container as described in claim 1, characterized in that... A heating nozzle sleeve (30) is provided in the fixed mold frame (3) located outside the heating nozzle (13), and a heating coil (31) is provided in the heating nozzle sleeve.

6. The high-precision injection mold for the medical sampling container as described in claim 1, characterized in that... Heating tubes (32) are provided on the hot runner plate (11).

7. The high-precision injection mold for the medical sampling container as described in claim 1, characterized in that... A guide post (33) is provided between the moving mold plate (2) and the moving mold frame (8). The guide post (33) passes through the ejector base plate (6) and the ejector panel (7), and a reset spring (35) is provided on the guide post (33) between the ejector panel (7) and the bottom surface of the moving mold frame (8).

8. The high-precision injection mold for the medical sampling container as described in claim 1, characterized in that... A heat insulation plate (36) is provided on the fixed mold plate (1).

Images