An injection mold for medical container products

Abstract

The present invention relates to the technical field of injection molds, and more specifically, it relates to an injection mold for a medical container product, comprising an injection molding table, an injection molding frame, an upper mold and a lower mold, wherein the injection molding frame is fixedly arranged on the injection molding table, the upper mold is lifted and lowered on the injection molding frame, the upper mold is a movable mold, the lower mold is fixedly arranged on the injection molding table, the lower mold is a movable mold, and the upper mold and the lower mold are relatively arranged in a vertical direction; an upper mold cavity is provided at the bottom of the upper mold, and a lower mold cavity is provided at the top of the lower mold, and when the upper mold and the lower mold are molded together, the upper mold cavity and the lower mold cavity form a complete mold cavity; a disinfection port is provided on the upper mold, and a disinfection channel is provided between the disinfection port and the upper mold cavity, and when the upper mold and the lower mold are molded together, the disinfection port and the disinfection channel are used to inject disinfectant into the mold cavity; a drainage channel with an opening and closing function is provided in the lower mold cavity, and the injection mold for a medical container product of the present invention can better ensure that the medical container product meets the requirements of the hygiene standard.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to an injection mold for medical container products. Background Art

[0002] Medical container products are products designed specifically for the storage, transportation and use of medical-related items, including syringes, test tubes, infusion bags, medicine bottles, specimen bottles and refrigerated containers. Medical container products can be quickly produced by injection molding.

[0003] For example, for the injection molding of syringes, a Chinese patent with publication number CN219311879U can be used to disclose a burr-free injection mold for syringes, which includes an injection molding table, a first threaded rod is rotatably connected to the left inner surface of the injection molding table, a motor is fixedly installed on the bottom outer surface of the injection molding table, a second threaded rod is rotatably connected to the right inner surface of the injection molding table, and a plurality of ejector posts are fixedly connected to the top outer surface of the connecting plate. The burr-free injection mold for syringes drives the first threaded rod to rotate by a motor, and drives the second threaded rod to rotate under the action of two active bevel gears and two driven bevel gears, thereby driving the ejector posts to eject the molded syringe, solving the problem that most existing syringe injection molds need to be manually demolded during the demolding process, and the bolts on the mold are screwed out in turn, and then the molded syringe is extruded. This method is complicated to operate and has a large workload, resulting in low demolding efficiency, thereby reducing production efficiency.

[0004] The difference between medical container products and other injection molded products is that medical container products must meet strict hygiene standards to ensure the safety and effectiveness of drugs and biological samples, so that they can be effectively used in hospitals, laboratories and clinics to protect medical supplies and avoid contamination and cross infection. However, the above-mentioned injection molds lack disinfection function and there is a defect that it is difficult to ensure that medical container products meet hygiene standards. Summary of the invention

[0005] In order to better ensure that medical container products can meet the requirements of hygiene standards, the present application provides an injection mold for medical container products.

[0006] The injection mold of a medical container product provided by the present invention adopts the following technical solution:

[0007] An injection mold for a medical container product comprises an injection molding table, an injection molding frame, an upper mold and a lower mold, wherein the injection molding frame is fixedly arranged on the injection molding table, the upper mold is lifted and lowered on the injection molding frame, the upper mold is a movable mold, the lower mold is fixedly arranged on the injection molding table, the lower mold is a fixed mold, and the upper mold and the lower mold are arranged opposite to each other in a vertical direction; an upper mold is provided at the bottom of the upper mold, and a lower mold is provided at the top of the lower mold, and when the upper mold and the lower mold are molded together, the upper mold cavity and the lower mold cavity form a complete mold cavity; a disinfection port is provided on the upper mold, and a disinfection channel is provided between the disinfection port and the upper mold cavity, and when the upper mold and the lower mold are molded together, the disinfection port and the disinfection channel are used to inject disinfectant into the mold cavity; and a drainage channel with an opening and closing function is provided in the lower mold cavity.

[0008] Preferably, the upper mold is provided with an injection port, and an injection channel is provided between the injection port and the upper cavity; when the upper mold and the lower mold are closed, the injection port and the injection channel are used to inject molten plastic into the cavity; the injection port also serves as the disinfection port, and the injection channel also serves as the disinfection channel.

[0009] Preferably, a push rod is provided at the bottom of the injection molding table for lifting, and the upper end of the push rod vertically penetrates into the lower cavity from the bottom of the lower mold; the push rod includes a cylinder and a T-rod, the cylinder is hollow and has an upper end open, a partition is provided in the middle of the cylinder, the upper end of the T-rod is a thick end and the lower end is a thin end, the lower end of the T-rod extends into the cylinder and passes through the partition, and the upper end of the T-rod abuts against the upper end of the cylinder; a third driving member is provided at the bottom of the cylinder, and the third driving member drives the T-rod to lift and lower; a through hole is also provided between the inner and outer walls of the cylinder, the through hole is located above the partition, and a drainage channel with an opening and closing function is formed between the partition and the upper end of the T-rod.

[0010] Preferably, the lifting process of the push rod includes a slow stage and a fast stage in sequence. In the slow stage, only the push rod is lifted. In the fast stage, the T-bar is lifted while the push rod is lifted.

[0011] Preferably, an elastic member is sleeved on the lower end of the T-bar, and the elastic member is located at the lower end of the partition and is squeezed as the T-bar rises. In the rapid stage of the lifting of the push rod, the elastic force of the elastic member gradually slows down the lifting speed of the T-bar.

[0012] Preferably, the elastic member is a spring.

[0013] Preferably, the cylinder is divided into a first cylinder and a second cylinder from top to bottom, the first cylinder has two ends penetrated, the second cylinder has an upper end penetrated, and the lower end of the first cylinder is connected to the upper end of the second cylinder by screws.

[0014] Preferably, a wire hole is provided on the lower side wall of the cylinder.

[0015] Preferably, a avoidance hole is opened in the center of the table top of the injection molding table, the cross-sectional size of the avoidance hole is between the cross-sectional size of the lower mold and the cross-sectional size of the push rod, the lower mold is arranged above the avoidance hole, and the push rod extends into the lower mold through the avoidance hole.

[0016] Preferably, a positioning ring is arranged on the table top of the injection molding table, and the positioning ring is arranged around the avoidance hole, and the shape of the inner contour of the positioning ring corresponds to the shape of the outer contour of the lower mold.

[0017] The beneficial effects of the present invention are:

[0018] 1. When the injection mold of the present invention is used to produce medical container products, disinfectant can be regularly injected into the mold cavity after mold closing for disinfection, and the disinfectant can be smoothly discharged after disinfection to achieve the disinfection effect of the mold cavity, so as to better ensure that the medical container products can meet the requirements of the hygiene standards;

[0019] 2. The injection port is also used as the disinfection port, and the injection channel is also used as the disinfection channel. On the one hand, the injected disinfectant can disinfect the injection port and the injection channel at the same time. On the other hand, this can make full use of the injection port and the injection channel and simplify the structure of the upper mold;

[0020] 3. Based on the design that the ejector rod is divided into a cylinder and a T-bar, in the invention, the ejector rod lifts the medical container product in a slow stage and a fast stage. In the slow stage, only the ejector rod is lifted. In the fast stage, the T-bar is lifted at the same time as the ejector rod is lifted. The advantage of sequentially including the slow stage and the fast stage in the ejection process of the medical container product by the ejector rod is that the slow ejection in the early stage can effectively reduce the impact force applied to the medical container product during the initial ejection, and reduce the cracking or deformation caused by the sudden force. The fast ejection in the later stage can speed up the ejection efficiency while ensuring the product quality, and avoid reducing the ejection efficiency due to the slow ejection throughout the process.

[0021] 4. In the rapid stage when the ejector rod ejects the medical container product, the gradually increasing elastic force will gradually slow down the ejection speed of the T-bar, and finally slow down the overall ejection speed of the ejector rod, so as to avoid the medical container product from bouncing too high due to over-rapid ejection, thereby protecting the ejected medical container product. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is an overall structural diagram of an injection mold for a medical container product in an embodiment of the present application;

[0023] Figure 2 is a structural cross-sectional view of an injection mold of a medical container product in an embodiment of the present application;

[0024] Figure 3 It is a structural cross-sectional view of the ejector rod in the embodiment of the present application.

[0025] Explanation of the accompanying drawings: 1. Injection molding frame; 11. Upper mold; 12. Upper cavity; 2. Injection molding table; 21. Lower mold; 22. Lower cavity; 23. Avoidance hole; 24. Positioning ring; 31. First driving member; 32. Second driving member; 33. Third driving member; 41. Injection port; 42. Injection channel; 51. Disinfection port; 52. Disinfection channel; 6. Ejector rod; 7. Cylinder; 71. First cylinder; 72. Second cylinder; 73. Partition; 74. Spring; 75. Wire hole; 8. T-bar. DETAILED DESCRIPTION

[0026] The following will be combined with the attached Figure 1 -Attached Figure 3 The present invention is further illustrated by the following embodiments.

[0027] This embodiment discloses an injection mold for a medical container product.

[0028] Reference Figure 1 The injection mold of the medical container product includes an injection molding table 2, an injection molding frame 1, an upper mold 11 and a lower mold 21. The injection molding frame 1 is fixedly arranged on the injection molding table 2, and the upper mold 11 is arranged on the injection molding frame 1 for lifting. The upper mold 11 is a movable mold, and the lower mold 21 is fixedly arranged on the injection molding table 2. The lower mold 21 is a fixed mold. The upper mold 11 and the lower mold 21 are arranged relative to each other in the vertical direction. When the upper mold 11 descends relative to the lower mold 21, it is a mold closing process, and when the upper mold 11 rises relative to the lower mold 21, it is a mold opening process. In order to realize the lifting action of the upper mold 11, a first driving member 31 is arranged on the top of the injection molding frame 1. In this embodiment, the first driving member 31 is a first cylinder, and the telescopic end of the first cylinder faces downward. The upper mold 11 is fixedly connected to the lower end of the telescopic end of the first cylinder, so that the upper mold 11 is lifted and lowered under the control of the first cylinder.

[0029] Reference Figure 1 and Figure 2The upper mold 11 has an upper cavity 12 at the bottom, and the lower mold 21 has a lower cavity 22 at the top. When the upper mold 11 and the lower mold 21 are molded together, the upper cavity 12 and the lower cavity 22 form a complete cavity, and the shape of the cavity is set according to the specific shape of the medical container product. The side wall of the upper mold 11 has an injection port 41, and an injection channel 42 is provided between the injection port 41 and the upper cavity 12. After the upper mold 11 and the lower mold 21 are molded together, the injection port 41 and the injection channel 42 are used to inject molten plastic into the cavity for injection molding. In other embodiments, the injection port 41 can also be opened at the top of the upper mold 11.

[0030] Reference Figure 1 and Figure 2 The upper mold 11 is provided with a disinfection port 51, and a disinfection channel 52 is provided between the disinfection port 51 and the upper mold cavity 12. When the upper mold 11 and the lower mold 21 are molded together, the disinfection port 51 and the disinfection channel 52 are used to inject disinfectant into the mold cavity. Furthermore, the lower mold cavity 22 is provided with a drainage channel with an opening and closing function, and the disinfectant is discharged through the opened drainage channel. Through the above arrangement, when the injection mold of the present invention is used to produce medical container products, disinfectant can be regularly injected into the mold cavity after the mold is closed for disinfection, and the disinfectant can be smoothly discharged after disinfection, so as to achieve the disinfection effect of the mold cavity, and better ensure that the medical container products can meet the requirements of the hygiene standards.

[0031] Reference Figure 1 and Figure 2 In particular, in the present invention, the injection port 41 also serves as the disinfection port 51, and the injection channel 42 also serves as the disinfection channel 52. On the one hand, the injected disinfectant can disinfect the injection port 41 and the injection channel 42 at the same time. On the other hand, this can make full use of the injection port 41 and the injection channel 42 to simplify the structure of the upper mold 11.

[0032] Reference Figure 2 and Figure 3 The bottom of the injection molding table 2 is provided with a push rod 6, and the upper end of the push rod 6 vertically penetrates from the bottom of the lower mold 21 into the lower mold cavity 22. After the injection mold is injection-molded and the mold is opened, the push rod 6 can push out the molded medical container product by rising upward, so as to achieve the effect of convenient material removal. In order to realize the lifting action of the push rod 6, a second driving member 32 is provided at the bottom of the injection molding table 2. In this embodiment, the second driving member 32 is a second cylinder, and the telescopic end of the second cylinder faces upward. The push rod 6 is fixedly connected to the upper end of the telescopic end of the second cylinder, so that the push rod 6 is lifted and lowered under the control of the second cylinder.

[0033] Reference Figure 2 and Figure 3, the top rod 6 includes a cylinder 7 and a T-shaped rod 8. The cylinder 7 is hollow and has an open top. A partition 73 is arranged in the middle of the cylinder 7. The upper end of the T-shaped rod 8 is a thick end and the lower end is a thin end. The lower end of the T-shaped rod 8 extends into the cylinder 7 and passes through the partition 73. The upper end of the T-shaped rod 8 abuts against the upper end of the cylinder 7. A third driving member 33 is arranged at the bottom of the cylinder 7. In this embodiment, the third driving member 33 is a third cylinder. The telescopic end of the third cylinder faces upward. The telescopic end of the third cylinder is fixedly connected to the lower end of the T-shaped rod 8. The third cylinder drives the T-shaped rod 8 to move up and down. In other embodiments, the third driving member 33 can also be an electric cylinder as long as it can realize the lifting and lowering drive of the T-shaped rod 8. The lower end side wall of the cylinder 7 is also provided with a wire hole 75. The wire hole 75 is used for the pipeline or wire of the third driving member 33 to enter and exit. A through hole is also provided between the inner and outer walls of the cylinder 7. The through hole is located above the partition 73. Through the above-mentioned arrangement, a drainage channel with an opening and closing function is formed between the partition 73 and the upper end of the T-bar 8. The principle is: when disinfectant is injected into the cavity and needs to be discharged, the third driving member 33 controls the T-bar 8 to rise, so that the upper end of the T-bar 8 is separated from the upper end of the cylinder 7. At this time, the disinfectant can enter the cylinder 7 and finally be discharged through the through hole in the cylinder 7. In addition, in order to further guide the disinfectant to be discharged to the specified position, the through hole of the cylinder 7 can be connected to a pipeline. After the disinfectant is discharged, the third driving member 33 controls the upper end of the T-bar 8 to abut against the upper end of the cylinder 7 again to achieve the closure of the drainage channel.

[0034] Reference Figure 2 In order to avoid the ejector pin 6, an avoidance hole 23 is provided at the center of the tabletop of the injection molding table 2. The cross-sectional size of the avoidance hole 23 is between the cross-sectional size of the lower mold 21 and the cross-sectional size of the ejector pin 6. The lower mold 21 is arranged above the avoidance hole 23. The ejector pin 6 extends into the lower mold 21 through the avoidance hole 23. By providing the avoidance hole 23, the obstruction of the tabletop of the injection molding table 2 to the ejector pin 6 can be reduced, and it is also convenient for the through hole of the drainage channel of the ejector pin 6 to be connected to the external pipeline. Furthermore, a positioning ring 24 is provided on the tabletop of the injection molding table 2. The positioning ring 24 is provided around the avoidance hole 23. The inner contour of the positioning ring 24 corresponds to the outer contour of the lower mold 21. The positioning ring 24 is used to position the lower mold 21 on the tabletop of the injection molding table 2. The positioning ring 24 is connected to the injection molding table 2 by screws.

[0035] Reference Figure 2 and Figure 3Based on the design that the ejector rod 6 is divided into a cylinder 7 and a T-shaped rod 8, in the invention, the ejection process of the ejector rod 6 on the medical container product includes a slow stage and a fast stage in sequence. In the slow stage, only the ejector rod 6 is lifted. In the fast stage, when the ejector rod 6 is lifted, the T-shaped rod 8 is also lifted. The advantage of including the slow stage and the fast stage in sequence in the ejection process of the medical container product by the ejector rod 6 is that the slow ejection in the early stage can effectively reduce the impact force applied to the medical container product during the initial ejection, and reduce the cracking or deformation caused by the sudden force. The fast ejection in the later stage can speed up the ejection efficiency while ensuring the quality of the product, and avoid reducing the ejection efficiency due to the slow ejection throughout the process.

[0036] Reference Figure 2 and Figure 3 , the lower end of the T-bar 8 is sleeved with an elastic member, which is located at the lower end of the partition 73 and is squeezed as the T-bar 8 rises. By setting the elastic member, in the rapid stage of ejection of the medical container product by the ejector 6, the gradually increasing elastic force will gradually slow down the ejection speed of the T-bar 8, and finally slow down the overall ejection speed of the ejector 6, so as to avoid the medical container product from bouncing too high due to too fast ejection, thereby protecting the ejected medical container product. It should be noted that although the ejection speed of the medical container product by the ejector 6 will gradually decrease in the rapid stage, it is still higher than the ejection speed in the slow stage, ensuring that the injection molded medical container product still has a good ejection efficiency. In this embodiment, the elastic member is a spring 74, and the two ends of the spring 74 are respectively connected to the partition 73 and the telescopic end of the third driving member 33.

[0037] Reference Figure 3 The cylinder 7 is a spliced ​​structure. Specifically, the cylinder 7 is divided into a first cylinder 71 and a second cylinder 72 from top to bottom. Both ends of the first cylinder 71 are penetrated, and the upper end of the second cylinder 72 is penetrated. The lower end of the first cylinder 71 and the upper end of the second cylinder 72 are connected by screws. The cylinder 7 composed of a spliced ​​structure can facilitate the installation of the third driving member 33 and the spring 74 in the cylinder 7.

[0038] The above are all preferred embodiments of the present invention, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. An injection mold for a medical container product, characterized in that: The invention comprises an injection molding table (2), an injection molding frame (1), an upper mold (11) and a lower mold (21), wherein the injection molding frame (1) is fixedly arranged on the injection molding table (2), the upper mold (11) is arranged on the injection molding frame (1) in a lifting manner, the upper mold (11) is a movable mold, the lower mold (21) is fixedly arranged on the injection molding table (2), the lower mold (21) is a fixed mold, and the upper mold (11) and the lower mold (21) are arranged opposite to each other in a vertical direction; an upper mold cavity (12) is provided at the bottom of the upper mold (11), and a lower mold cavity (12) is provided at the top of the lower mold (21). The mold cavity (22) comprises a mold portion, wherein when the upper mold (11) and the lower mold (21) are molded together, the upper mold cavity (12) and the lower mold cavity (22) form a complete mold cavity; the upper mold (11) is provided with a disinfection port (51), and a disinfection channel (52) is provided between the disinfection port (51) and the upper mold cavity (12); when the upper mold (11) and the lower mold (21) are molded together, the disinfection port (51) and the disinfection channel (52) are used to inject disinfectant into the mold cavity; the lower mold cavity (22) is provided with a liquid discharge channel with an opening and closing function; The upper mold (11) is provided with an injection port (41), and an injection channel (42) is provided between the injection port (41) and the upper mold cavity (12); when the upper mold (11) and the lower mold (21) are molded together, the injection port (41) and the injection channel (42) are used to inject molten plastic into the mold cavity; the injection port (41) also serves as the disinfection port (51), and the injection channel (42) also serves as the disinfection channel (52); The bottom of the injection molding table (2) is provided with a push rod (6) for lifting, and the upper end of the push rod (6) vertically penetrates into the lower mold cavity (22) from the bottom of the lower mold (21); the push rod (6) comprises a cylinder (7) and a T-shaped rod (8); the cylinder (7) is hollow and has an open upper end; a partition plate (73) is provided in the middle of the cylinder (7); the upper end of the T-shaped rod (8) is a thick end and the lower end is a thin end; the lower end of the T-shaped rod (8) extends into the cylinder (7). 7) and penetrates the partition (73), the upper end of the T-shaped rod (8) abuts against the upper end of the cylinder (7); a third driving member (33) is provided at the bottom of the cylinder (7), and the third driving member (33) drives the T-shaped rod (8) to move up and down; a through hole is also provided between the inner and outer walls of the cylinder (7), and the through hole is located above the partition (73), and a drainage channel with an opening and closing function is formed between the partition (73) and the upper end of the T-shaped rod (8); The lifting process of the push rod (6) includes a slow stage and a fast stage in sequence. In the slow stage, only the push rod (6) is lifted. In the fast stage, when the push rod (6) is lifted, the T-shaped rod (8) is also lifted.

2. The injection mold for a medical container product according to claim 1, characterized in that: The lower end of the T-shaped rod (8) is sleeved with an elastic member, which is located at the lower end of the partition (73) and is squeezed as the T-shaped rod (8) rises. During the rapid stage of the lifting of the push rod (6), the elastic force of the elastic member gradually slows down the lifting speed of the T-shaped rod (8).

3. The injection mold for a medical container product according to claim 2, characterized in that: The elastic member is a spring (74).

4. The injection mold for a medical container product according to claim 1, characterized in that: The cylinder (7) is divided into a first cylinder (71) and a second cylinder (72) at the top and bottom. The first cylinder (71) is penetrated at both ends, and the second cylinder (72) is penetrated at the top. The lower end of the first cylinder (71) and the upper end of the second cylinder (72) are connected by screws.

5. The injection mold for a medical container product according to claim 1, characterized in that: A wire-passing hole (75) is provided on the side wall of the lower end of the cylinder (7).

6. The injection mold for a medical container product according to claim 1, characterized in that: A avoidance hole (23) is provided at the center of the table top of the injection molding table (2); the cross-sectional size of the avoidance hole (23) is between the cross-sectional size of the lower mold (21) and the cross-sectional size of the ejector rod (6); the lower mold (21) is arranged above the avoidance hole (23); and the ejector rod (6) extends into the lower mold (21) through the avoidance hole (23).

7. The injection mold for a medical container product according to claim 6, characterized in that: A positioning ring (24) is arranged on the table surface of the injection molding table (2), and the positioning ring (24) is arranged around the avoidance hole (23), and the shape of the inner contour of the positioning ring (24) corresponds to the shape of the outer contour of the lower mold (21).

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