Glucometer shell injection mold with exhaust structure

Abstract

The utility model discloses a glucometer shell injection mold with an exhaust structure, which belongs to the technical field of glucometers and comprises a lower mold and an upper mold, and a lower forming cavity is arranged on the top surface of the lower mold. According to the injection mold, the lower molding cavity in the lower mold and the upper molding seat at the lower part of the upper mold form an injection molding area of the glucometer shell, and molten plastic is injected into the lower molding cavity through the injection molding pipe during injection molding; the gas guide net groove in the bottom face of the upper forming base is used for guiding gas generated by decomposition of raw materials and water vapor generated by evaporation of residual water in the raw materials, the gas enters the gas collecting ring groove, and when the gas in the gas collecting ring groove reaches a certain air pressure, the gas pushes the hole blocking column to move upwards, so that the gas is exhausted outwards from the exhaust hole and the air outlet hole; the effects that air at different positions is gathered into the air collecting ring groove, and the air is discharged in a unified mode through the exhaust holes and the air outlet holes are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of blood glucose meters, and more specifically, to an injection mold for a blood glucose meter housing with an exhaust structure. Background Technique

[0002] A blood glucose meter is an electronic instrument for measuring blood glucose levels. Blood glucose meters are divided into two types from the working principle: photoelectric type and electrode type, and are divided into two types from the blood collection method: wiping blood type and blood sucking type. The housing of a blood glucose meter is generally made of plastic material, and a specific injection mold is required during the production of the blood glucose meter housing.

[0003] When the blood glucose meter housing is injection molded, it is necessary to avoid phenomena such as insufficient filling, product surface burns, high internal stress inside the product, surface flow lines, and weld lines. In addition to considering adjusting the injection process and gate position, the main reason for these phenomena is whether it is caused by the gas in the cavity. The sources of gas in the cavity are mainly divided into three categories: the air accumulated in the cavity, the gas generated by the decomposition of the raw material, and the water vapor evaporated from the residual water in the raw material. Therefore, it is necessary to exhaust the air in the cavity. Due to different sources, the positions of the generated bubbles are also different, which is not convenient for exhausting the gas at different positions. Moreover, the cavity will be filled with air before injection molding, and it is not convenient for the gas to be quickly exhausted during injection molding, which affects the injection of the injection material. For this reason, we propose an injection mold for a blood glucose meter housing with an exhaust structure. Content of the Utility Model

[0004] Aiming at the problems existing in the prior art, the purpose of the utility model is to provide an injection mold for a blood glucose meter housing with an exhaust structure.

[0005] To solve the above problems, the utility model adopts the following technical solutions:

[0006] An injection mold for a blood glucose meter housing with an exhaust structure, including a lower mold and an upper mold. A lower forming cavity is arranged on the top surface of the lower mold, and a jacking mechanism is arranged on the lower mold. An upper forming seat is arranged at the bottom of the upper mold, and the bottom end of the upper forming seat extends into the inner cavity of the lower forming cavity. The top surface of the lower mold and the bottom surface of the upper mold are in contact with each other. An air extraction mechanism is arranged on the upper mold. A plurality of air guiding mesh grooves are arranged on the outer side surface of the upper forming seat. An air collecting ring groove is arranged on the bottom surface of the upper mold. The end of the air guiding mesh groove is communicated with the inner cavity of the air collecting ring groove. An air outlet hole is arranged on the top surface of the upper mold. An exhaust hole is arranged on the bottom surface of the inner cavity of the air outlet hole. The bottom end of the exhaust hole is communicated with the inner cavity of the air collecting ring groove. A spring is fixedly connected to the bottom surface of the inner cavity of the air outlet hole. The top end of the spring is fixedly connected to a lifting block. A hole blocking column is fixedly connected to the bottom surface of the lifting block. The bottom end of the hole blocking column extends into the inner cavity of the exhaust hole. The side surface of the hole blocking column is in contact with the inner wall of the exhaust hole. The outer diameter of the lifting block is smaller than the inner diameter of the air outlet hole.

[0007] As a preferred embodiment of the present utility model, the air extraction mechanism includes an air extraction groove formed on the top surface of the upper mold, a movable groove formed on the side of the upper mold, and an air extraction pump fixedly installed on the top surface of the upper mold. The input end of the air extraction pump is fixedly connected with an air extraction pipe, and the end of the air extraction pipe is fixedly sleeved into the inner cavity of the air extraction groove. The bottom end of the air extraction groove is communicated with the inner cavity of the air collection ring groove, the inner cavity of the air extraction groove is communicated with the inner cavity of the movable groove, an L-shaped insertion plate is sleeved in the inner cavity of the movable groove, one end of the L-shaped insertion plate extends to the side of the upper mold and is fixedly sleeved with a magnet block, and the side surface of the magnet block is attached to the side surface of the upper mold.

[0008] As a preferred embodiment of the present utility model, the jacking mechanism includes a telescopic groove formed on the bottom surface of the lower mold and an electric push rod fixedly installed on the bottom surface of the lower mold. A telescopic hole is formed on the top surface of the inner cavity of the telescopic groove, the top end of the telescopic hole is communicated with the bottom surface of the inner cavity of the lower molding cavity, the output end of the electric push rod extends into the inner cavity of the telescopic groove and is fixedly connected with a top block, a top rod is fixedly connected to the top surface of the top block, the top end of the top rod is movably sleeved into the inner cavity of the telescopic hole, the top surface of the top rod is flush with the bottom surface of the inner cavity of the lower molding cavity, and the inner wall of the telescopic hole is attached to the side surface of the top rod.

[0009] As a preferred embodiment of the present utility model, an injection molding pipe is fixedly sleeved on the upper mold, the bottom end of the injection molding pipe is flush with the bottom surface of the upper molding seat, and a switching valve is fixedly installed in the middle of the injection molding pipe.

[0010] As a preferred embodiment of the present utility model, two mounting seats are fixedly connected to the bottom surface of the lower mold.

[0011] As a preferred embodiment of the present utility model, the side surface of the top block is attached to the inner wall of the telescopic groove.

[0012] The advantages of the present utility model are as follows:

[0013] (1) In the present utility model, the injection area of the blood glucose meter shell is formed by the lower molding cavity on the lower mold and the upper molding seat at the lower part of the upper mold. During injection molding, molten plastic is injected into the lower molding cavity through the injection molding pipe. The air guide mesh groove on the bottom surface of the upper molding seat is used to guide the gas decomposed from the raw material and the water vapor evaporated from the residual water in the raw material, and the gas is made to enter the air collection ring groove. When the gas in the air collection ring groove reaches a certain air pressure, the gas pushes the plugging hole column upward, so that the gas is discharged outward through the exhaust hole and the air outlet hole, realizing the effect of gathering the air in different positions into the air collection ring groove and uniformly discharging the gas through the exhaust hole and the air outlet hole.

[0014] (2) In the present utility model, after the lower die and the upper die are closed, an air extraction pump is used to generate suction in the air extraction pipe and the air extraction groove. The suction of the air extraction groove is used to suck out the vacuum state in the area composed of the lower forming cavity and the upper forming seat. At this time, the L-shaped plug board is pushed to block the air extraction groove, so that the area composed of the lower forming cavity and the upper forming seat remains in a vacuum state, avoiding the need to exhaust the gas in the area composed of the lower forming cavity and the upper forming seat during injection molding, and improving the practicability of the mold. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 is a sectional view schematic diagram of the present utility model;

[0017] Figure 3 is a schematic diagram of the structure of the lower die of the present utility model;

[0018] Figure 4 is a sectional view schematic diagram of the lower die of the present utility model;

[0019] Figure 5 is a schematic diagram of the structure of the upper forming seat of the present utility model;

[0020] Figure 6 is a sectional view schematic diagram of the upper forming seat of the present utility model;

[0021] Figure 7 is a sectional view schematic diagram of the upper die of the present utility model;

[0022] Figure 8 of the present utility model Figure 6 is an enlarged schematic diagram of part A;

[0023] Figure 9 of the present utility model Figure 6 is an enlarged schematic diagram of part B.

[0024] Explanation of the reference numerals in the drawings:

[0025] 1. Lower die; 2. Upper die; 3. Lower forming cavity; 4. Upper forming seat; 5. Lifting mechanism; 6. Air extraction mechanism; 7. Air guide mesh groove; 8. Air collection ring groove; 9. Exhaust hole; 10. Air outlet hole; 11. Spring; 12. Lifting block; 13. Hole blocking column; 14. Air extraction groove; 15. Movable groove; 16. Air extraction pump; 17. L-shaped plug board; 18. Magnet block; 19. Air extraction pipe; 20. Injection molding pipe; 21. Switch valve; 22. Mounting seat; 23. Expansion hole; 24. Expansion groove; 25. Electric push rod; 26. Top block; 27. Top rod. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top / bottom end", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0028] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "provided with", "sheathed / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] Embodiment:

[0030] Please refer to Figures 1-9 , an injection mold for a blood glucose meter housing with an exhaust structure, including a lower mold 1 and an upper mold 2. A lower forming cavity 3 is arranged on the top surface of the lower mold 1, a jacking mechanism 5 is arranged on the lower mold 1, an upper forming seat 4 is arranged at the bottom of the upper mold 2, the bottom end of the upper forming seat 4 extends into the inner cavity of the lower forming cavity 3, the top surface of the lower mold 1 and the bottom surface of the upper mold 2 are in contact with each other, an air extraction mechanism 6 is arranged on the upper mold 2, multiple air guide mesh grooves 7 are arranged on the outer side surface of the upper forming seat 4, an air collection ring groove 8 is opened on the bottom surface of the upper mold 2, the end of the air guide mesh groove 7 is communicated with the inner cavity of the air collection ring groove 8, an air outlet hole 10 is opened on the top surface of the upper mold 2, an exhaust hole 9 is opened on the bottom surface of the inner cavity of the air outlet hole 10, the bottom end of the exhaust hole 9 is communicated with the inner cavity of the air collection ring groove 8, a spring 11 is fixedly connected to the bottom surface of the inner cavity of the air outlet hole 10, the top end of the spring 11 is fixedly connected with a lifting block 12, a hole plugging column 13 is fixedly connected to the bottom surface of the lifting block 12, the bottom end of the hole plugging column 13 extends into the inner cavity of the exhaust hole 9, the side surface of the hole plugging column 13 is in contact with the inner wall of the exhaust hole 9, and the outer diameter of the lifting block 12 is smaller than the inner diameter of the air outlet hole 10.

[0031] Specifically, refer to Figure 1 , Figure 7 and Figure 9 . The air extraction mechanism 6 includes an air extraction groove 14 formed on the top surface of the upper mold 2, a movable groove 15 formed on the side of the upper mold 2, and an air extraction pump 16 fixedly installed on the top surface of the upper mold 2. The input end of the air extraction pump 16 is fixedly connected to an air extraction pipe 19, and the end of the air extraction pipe 19 is fixedly sleeved into the inner cavity of the air extraction groove 14. The bottom end of the air extraction groove 14 is communicated with the inner cavity of the air collection ring groove 8, the inner cavity of the air extraction groove 14 is communicated with the inner cavity of the movable groove 15, an L-shaped insertion plate 17 is sleeved in the inner cavity of the movable groove 15, one end of the L-shaped insertion plate 17 extends to the side of the upper mold 2 and is fixedly sleeved with a magnet block 18, and the side surface of the magnet block 18 is attached to the side surface of the upper mold 2.

[0032] In this embodiment, the inner cavity of the air extraction groove 14 is truncated by the end of the L-shaped insertion plate 17, and the L-shaped insertion plate 17 is fixed by the magnetic attraction force between the magnet block 18 and the upper mold 2. In addition, the lower mold 1 and the upper mold 2 are made of materials that can be adsorbed by magnets.

[0033] Specifically, refer to Figure 2 and Figure 4 . The jacking mechanism 5 includes a telescopic groove 24 formed on the bottom surface of the lower mold 1 and an electric push rod 25 fixedly installed on the bottom surface of the lower mold 1. A telescopic hole 23 is formed on the top surface of the inner cavity of the telescopic groove 24, and the top end of the telescopic hole 23 is communicated with the bottom surface of the inner cavity of the lower forming cavity 3. The output end of the electric push rod 25 extends into the inner cavity of the telescopic groove 24 and is fixedly connected to a top block 26. The top surface of the top block 26 is fixedly connected to a top rod 27. The top end of the top rod 27 is movably sleeved into the inner cavity of the telescopic hole 23, the top surface of the top rod 27 is flush with the bottom surface of the inner cavity of the lower forming cavity 3, and the inner wall of the telescopic hole 23 is attached to the side surface of the top rod 27.

[0034] In this embodiment, the electric push rod 25 is used to drive the top block 26 and the top rod 27 to move upward, and the blood glucose meter housing completed by injection molding in the inner cavity of the lower forming cavity 3 is ejected by the top rod 27.

[0035] Specifically, refer to Figure 1 . An injection molding pipe 20 is fixedly sleeved on the upper mold 2, the bottom end of the injection molding pipe 20 is flush with the bottom surface of the upper forming seat 4, and a switching valve 21 is fixedly installed in the middle of the injection molding pipe 20.

[0036] In this embodiment, injection molding is performed on the cavity formed by the lower forming cavity 3 and the upper forming seat 4 through the injection molding pipe 20.

[0037] Specifically, refer to Figure 2 . Two mounting seats 22 are fixedly connected to the bottom surface of the lower mold 1.

[0038] In this embodiment, the lower mold 1 is supported and fixed by the mounting seats 22.

[0039] Specifically, please refer to Figure 4 , the side surface of the top block 26 is in contact with the inner wall of the telescopic groove 24.

[0040] In this embodiment, the stability of the top block 26 in the inner cavity of the telescopic groove 24 is ensured.

[0041] Working principle: During use, first place the upper mold 2 on the top of the lower mold 1, and at the same time make the upper forming seat 4 extend into the inner cavity of the lower forming cavity 3. At this time, pull the L-shaped plug board 17 to make the upper part of the inner cavity of the air extraction groove 14 communicate with the inner cavity of the air collection ring groove 8, and at the same time make the inner cavity of the air extraction groove 14 communicate with the area composed of the lower forming cavity 3 and the upper forming seat 4. Then start the air extraction pump 16 to generate suction in the air extraction pipe 19 and the air extraction groove 14, and use the suction of the air extraction groove 14 to suck out the area composed of the lower forming cavity 3 and the upper forming seat 4 into a vacuum state. At this time, push the L-shaped plug board 17 to block the air extraction groove 14, so that the area composed of the lower forming cavity 3 and the upper forming seat 4 remains in a vacuum state. Then open the switch valve 21 and inject plastic into the inner cavities of the lower forming cavity 3 and the upper forming seat 4 through the injection pipe 20. The molten plastic fills the area composed of the lower forming cavity 3 and the upper forming seat 4. In addition, the gas decomposed from the raw material and the water vapor evaporated from the residual water in the raw material are guided through the air guide net groove 7 at the bottom surface of the upper forming seat 4, so that the gas enters the air collection ring groove 8. When the gas in the air collection ring groove 8 reaches a certain air pressure, the gas pushes the hole-blocking column 13 to move upward, so that the gas is discharged outward from the exhaust hole 9 and the air outlet hole 10. Finally, when the plastic in the area composed of the lower forming cavity 3 and the upper forming seat 4 solidifies, lift the upper mold 2 upward, start the electric push rod 25 to drive the top block 26 and the ejector rod 27 to move upward, and use the ejector rod 27 to eject the blood glucose meter housing located in the inner cavity of the lower forming cavity 3, and that's it.

[0042] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its improved concept, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A blood glucose meter housing injection mold with an exhaust structure, characterized in that: The invention comprises a lower mold (1) and an upper mold (2), wherein the top surface of the lower mold (1) is provided with a lower molding cavity (3), the lower mold (1) is provided with a lifting mechanism (5), the bottom of the upper mold (2) is provided with an upper molding seat (4), the bottom end of the upper molding seat (4) extends to the inner cavity of the lower molding cavity (3), the top surface of the lower mold (1) and the bottom surface of the upper mold (2) are in contact with each other, the upper mold (2) is provided with an exhaust mechanism (6), the outer side surface of the upper molding seat (4) is provided with a plurality of air guide mesh grooves (7), the bottom surface of the upper mold (2) is provided with an air collecting ring groove (8), the end of the air guide mesh groove (7) is connected to the inner cavity of the air collecting ring groove (8), and the An air outlet hole (10) is provided on the top surface of the upper mold (2), and an exhaust hole (9) is provided on the bottom surface of the inner cavity of the air outlet hole (10). The bottom end of the exhaust hole (9) is connected to the inner cavity of the air collecting ring groove (8). A spring (11) is fixedly connected to the bottom surface of the inner cavity of the air outlet hole (10), and a lifting block (12) is fixedly connected to the top of the spring (11). A hole blocking column (13) is fixedly connected to the bottom surface of the lifting block (12). The bottom end of the hole blocking column (13) extends to the inner cavity of the air outlet hole (9), and the side surface of the hole blocking column (13) is in contact with the inner wall of the air outlet hole (9). The outer diameter of the lifting block (12) is smaller than the inner diameter of the air outlet hole (10).

2. The blood glucose meter housing injection mold with an exhaust structure according to claim 1, characterized in that: The vacuum mechanism (6) comprises a vacuum groove (14) provided on the top surface of the upper mold (2), a movable groove (15) provided on the side of the upper mold (2), and a vacuum pump (16) fixedly installed on the top surface of the upper mold (2); the input end of the vacuum pump (16) is fixedly connected to a vacuum pipe (19); the end of the vacuum pipe (19) is fixedly sleeved to the inner cavity of the vacuum groove (14); the bottom end of the vacuum groove (14) is connected to the inner cavity of the air collecting ring groove (8); the inner cavity of the vacuum groove (14) is connected to the inner cavity of the movable groove (15); the inner cavity of the movable groove (15) is sleeved with an L-shaped plug plate (17); one end of the L-shaped plug plate (17) extends to the side of the upper mold (2) and is fixedly sleeved with a magnet block (18); the side surface of the magnet block (18) is in contact with the side surface of the upper mold (2).

3. The blood glucose meter housing injection mold with an exhaust structure according to claim 1, characterized in that: The lifting mechanism (5) comprises a telescopic slot (24) provided on the bottom surface of the lower mold (1) and an electric push rod (25) fixedly mounted on the bottom surface of the lower mold (1); a telescopic hole (23) is provided on the top surface of the inner cavity of the telescopic slot (24); the top end of the telescopic hole (23) is connected to the bottom surface of the inner cavity of the lower molding cavity (3); the output end of the electric push rod (25) extends to the inner cavity of the telescopic slot (24) and is fixedly connected to a push block (26); the top surface of the push block (26) is fixedly connected to a push rod (27); the top end of the push rod (27) is movably sleeved into the inner cavity of the telescopic hole (23); the top surface of the push rod (27) is flush with the bottom surface of the inner cavity of the lower molding cavity (3); the inner wall of the telescopic hole (23) and the side surface of the push rod (27) are in contact with each other.

4. The blood glucose meter housing injection mold with an exhaust structure according to claim 1, characterized in that: An injection tube (20) is fixedly sleeved on the upper mold (2), the bottom end of the injection tube (20) is flush with the bottom surface of the upper molding seat (4), and a switch valve (21) is fixedly installed in the middle of the injection tube (20).

5. The blood glucose meter housing injection mold with an exhaust structure according to claim 1, characterized in that: The bottom surface of the lower mold (1) is fixedly connected to two mounting seats (22).

6. The blood glucose meter housing injection mold with an exhaust structure according to claim 3, characterized in that: The side surface of the top block (26) is in contact with the inner wall of the telescopic groove (24).

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