Forced lubricating device for lower punching hole of tablet press

Abstract

The utility model relates to the technical field of pharmaceutical mechanical equipment, in particular to a forced lubricating device for a lower punching hole of a tablet press, which comprises an upper punching disc and a lower punching disc, and the upper punching disc is mounted at the upper end of the lower punching disc; the end cover is fixed on the equipment main shaft, and a channel is arranged in the end cover; the oil filling pipe is connected with the end cover through a flange, and one end of the oil filling pipe is connected with a rotary joint; the number of the pipe joints is two, one pipe joint is fixed to the surface of the end cover and communicated with the channel of the end cover, and the other pipe joint is installed on one side of the bottom of the lower punching disc; by means of pressure conveying of the oil filling pipe, the rotary connector and the hose, lubricating oil can directly reach the lower punching hole, the lubricating efficiency is improved by more than 60%, and the blocking problem caused by insufficient gravity is avoided.

Description

Technical Field

[0001] This utility model relates to the field of pharmaceutical machinery and equipment technology, and in particular to a forced lubrication device for the lower punch of a tablet press. Background Technology

[0002] Currently, the most common lubrication method for the lower punch of tablet presses on the market is gravity-feed lubrication. This means the lubricating oil flows into the lower punch through a fixed oil path under its own weight, thus lubricating the lower punch. This method has several drawbacks: First, the top-down flow makes it difficult to ensure that all the lubricating oil flows along the pre-set pipeline, easily causing lubricating oil to flow into other areas, creating a difficult-to-clean situation and increasing production costs. Second, gravity-feed lubrication is extremely inefficient and is prone to blockage when there is resistance during punching, leading to lubrication failure.

[0003] Therefore, a forced lubrication device for the punching hole of a tablet press is needed to solve the above-mentioned technical problems. Utility Model Content

[0004] The purpose of this invention is to provide a forced lubrication device for the lower punch of a tablet press. This invention uses pressure delivery through an oil inlet pipe, a rotary joint, and a hose to allow lubricating oil to directly reach the lower punch, improving lubrication efficiency by more than 60% and avoiding blockage problems caused by insufficient gravity.

[0005] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a forced lubrication device for the lower punch of a tablet press, comprising:

[0006] The upper punch and the lower punch are installed on top of the lower punch.

[0007] The end cap is fixed to the main shaft of the equipment and has a channel inside.

[0008] An oil inlet pipe is connected to the end cap via a flange, and a rotary joint is connected to one end of the oil inlet pipe;

[0009] The pipe connector has two parts. One pipe connector is fixed to the surface of the end cap and communicates with the channel of the end cap. The other pipe connector is installed on the bottom side of the lower punch plate.

[0010] The hose has one end connected to a pipe fitting on the surface of the end cap, and the other end passes through the upper punch plate and connects to a pipe fitting on the bottom side of the lower punch plate.

[0011] An oil injection ring is provided inside the lower punch plate, and a ring groove is provided in the middle of the oil injection ring;

[0012] A sealing ring is provided on both sides of the oil injection ring to seal the oil passage.

[0013] Furthermore, the rotary joint is a bidirectional rotary joint, ensuring that the oil inlet pipe and the end cover remain connected in the oil passage when the main shaft of the equipment rotates.

[0014] Furthermore, the hose is a pressure-resistant hose with an adjustable length to accommodate the relative movement between the upper and lower punch plates.

[0015] Furthermore, the groove of the oil injection ring is a continuous annular structure with a trapezoidal cross-section, which is used to ensure that the lubricating oil is evenly distributed to the punch.

[0016] The advantages of this utility model are as follows: This utility model provides a forced lubrication device for the lower punch of a tablet press, which has the following technical effects:

[0017] 1. High-efficiency lubrication: This utility model uses pressure delivery through the oil inlet pipe, rotary joint and hose to allow lubricating oil to directly reach the lower punch hole, improving lubrication efficiency by more than 60% and avoiding blockage problems caused by insufficient gravity.

[0018] 2. Precise oil control: This utility model ensures that lubricating oil only flows into the preset oil path by cooperating with the ring groove of the oil injection ring and the sealing ring, reducing the contamination rate by 90% and eliminating residual contamination from the powder.

[0019] Experimental data show that after using this device, no jerk or jerk phenomenon occurred after the equipment operated for a long time, which meets the high standard production requirements of the modern pharmaceutical industry. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of this utility model;

[0022] Figure 2 for Figure 1 A partially enlarged structural diagram;

[0023] in:

[0024] 1. Upper punch; 2. Lower punch; 3. Sealing ring;

[0025] 4. Oil injection ring; 41. Ring groove; 5. Rotary joint;

[0026] 6. Pipe fittings; 7. End caps; 8. Oil injection pipes;

[0027] 9. Oil inlet pipe; 10. Hose. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] Example 1:

[0031] Figure 1 This is a schematic diagram of the structure of this utility model. Figure 2 for Figure 1 A partially enlarged structural diagram, such as Figure 1 and Figure 2 The embodiment shows a forced lubrication device for the lower punch of a tablet press. This embodiment provides a forced lubrication device for the lower punch of a tablet press, such as... Figures 1 to 2 As shown, it specifically includes the following components:

[0032] End cap 7: Fixed to the main shaft of the tablet press by bolts. It has an L-shaped channel machined inside, with the inlet of the channel connected to the oil inlet pipe 9 and the outlet connected to the pipe connector 6.

[0033] Oil inlet pipe 9: It is sealed to end cover 7 via a flange. The other end of oil inlet pipe 9 is connected to bidirectional rotary joint 5 to ensure that the oil circuit is not interrupted when the spindle rotates.

[0034] Rotary joint 5: Select bidirectional high-pressure rotary joint 5 with a rated pressure of 0.5MPa, internal graphite sealing ring, and temperature range of -20℃ to 200℃.

[0035] Hose 10: Made of polyurethane, with an inner diameter of 6mm and a pressure resistance of 1MPa. One end is connected to the pipe connector 6 of the end cap 7 via a quick-connect fitting, and the other end passes through the reserved hole of the upper punch plate 1 and is connected to the pipe connector 6 at the bottom of the lower punch plate 2.

[0036] Oil injection ring 4: Embedded inside the lower punch 2, made of cemented carbide. Its annular groove 41 is 2mm wide and 1.5mm deep, corresponding one-to-one with the punch holes of the lower punch 2. The oil passage diameter of each punch is 0.8mm, and the spacing is evenly distributed.

[0037] Sealing ring 3: Installed in the grooves on both sides of the oil injection ring 4, made of fluororubber, with a compression rate of 20%, to ensure the oil circuit sealing.

[0038] Oil inlet pipe 9: Installed on rotary joint 5, oil inlet pipe 9 is connected to oil injection pipe 8 and is used to inject lubricating oil into oil injection pipe 8.

[0039] The working process of this utility model is as follows:

[0040] Lubricating oil is pumped from the external oil supply system into the inlet pipe 9, enters the channel of the end cap 7 through the rotary joint 5, and is then diverted to the hose 10 through the pipe joint 6. The hose 10 delivers the lubricating oil to the pipe joint 6 at the bottom of the lower punch 2, and then into the annular groove 41 of the oil injection ring 4. Under pressure, the lubricating oil is precisely injected into the inner wall of each lower punch hole through the oil flow hole (not shown in the figure), and after lubrication, it flows back to the collection tank through the waste oil pipeline.

[0041] Comparative Experiment: Tests were conducted on the same model tablet press using both traditional gravity lubrication and this invention: Contamination Comparison: Under the traditional method, the powder contamination rate was 1.2%; the contamination rate of this device was reduced to 0.1%. Efficiency Comparison: Traditional lubrication required 30 seconds for a single oil injection, while this device only required 10 seconds, increasing efficiency by 3 times. Yield Rate: The yield rate was 85% with the traditional method, and increased to 98.5% with this device.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A punch lubrication device for a tablet press, characterized in that The utility model relates to a punch device, including: upper punch plate (1) and lower punch plate (2), upper punch plate (1) is installed in the upper end of lower punch plate (2), end cover (7) is fixed on the equipment main shaft, and the passage is arranged in the inside of end cover (7), oil inlet pipe (9) is connected with end cover (7) through flange, and rotary joint (5) is connected in one end of oil inlet pipe (9), pipe joint (6) is provided with two, one pipe joint (6) is fixed on the surface of end cover (7) and is communicated with the passage of end cover (7), and the other pipe joint (6) is installed in the bottom one side of lower punch plate (2), hose (10) is connected with the pipe joint (6) on the surface of end cover (7) in one end, and is connected with the pipe joint (6) on the bottom one side of lower punch plate (2) through upper punch plate (1) in the other end, oil injection ring (4) is arranged in the inside of lower punch plate (2), and the annular groove (41) is arranged in the middle of oil injection ring (4), sealing ring (3) is arranged on both sides of oil injection ring (4) and is used for sealing oil circuit.

2. A punch lubrication device for a tablet press according to claim 1, characterized in that Rotary joint (5) is bidirectional rotary joint (5), and it ensures that oil inlet pipe (9) and end cover (7) keep oil circuit communication when the equipment main shaft rotates.

3. A punch lubrication device for a tablet press according to claim 1, characterized in that The length of hose (10) is adjustable to adapt to the relative movement between upper punch plate (1) and lower punch plate (2).

4. A punch lubrication device for a tablet press according to claim 1, characterized in that The annular groove (41) of oil injection ring (4) is continuous annular structure, and the cross section is trapezoidal, which is used for ensuring that lubricating oil is evenly distributed to punch.

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