Filter for filter reduced pressure pneumatic

Abstract

The invention relates to a filter and a manufacturing method thereof, in particular to a filter which is used for being installed in a filtering pressure-reducing pneumatic valve to filter gas, and the filter comprises a net-shaped body and a shell, the front end of the net-shaped body is provided with an embedding part, and the tail end is provided with a positioning part with the outer diameter larger than that of the net-shaped body; the shell is provided with a wrapping part used for wrapping the embedding part, a connecting part which extends from the wrapping part and is used for supporting the net-shaped body, and a body part which extends from the connecting part and is used for fixing the positioning part, the inner wall surface of the body part is provided with at least one first inner ring part and a second inner ring part, and the inner diameter of the second inner ring part is larger than that of the first inner ring part; and a stop surface embedded with the positioning part is formed between the first inner ring part and the second inner ring part, so that the net-shaped body is fixed on the shell.

Description

Technical Field

[0001] The present invention relates to a filter and a manufacturing method thereof, and in particular to a filter and a manufacturing method thereof for being installed in a filtering and reducing pressure pneumatic valve to filter moisture, dust and impurities carried by gas. Background Art

[0002] The filter is one of the main parts used to filter gas in the pressure reducing pneumatic valve. Its working principle is to input the compressed gas into the filter chamber, evolve the gas source, and filter out most of the moisture, dust or solid impurities.

[0003] The existing filters are mainly composed of a hollow cylindrical round screen and a plastic integrally molded structure. However, the existing round screen cannot be effectively and tightly fitted, so when the plastic is injected during the injection molding process, the plastic will generate high-pressure flow. When the round screen cannot be effectively fixed in the mold, it will be pushed by the flowing plastic in the mold, causing the round screen to shift in the mold, which is easy to cause leakage (meaning that the round screen cannot be effectively covered by plastic) or deviation, resulting in functional failure of the finished product.

[0004] Therefore, how to provide a filter that can ensure that the cylindrical screen can be effectively coated during the injection molding process to improve the qualified rate of the finished product is the problem to be solved in this case. Summary of the invention

[0005] The main purpose of the present invention is to provide a filter and a method for manufacturing the same, in particular, a filter and a method for manufacturing the same which are used in a filtering and pressure reducing pneumatic valve and which can prevent leakage during the injection process and can effectively improve the qualified rate of finished products.

[0006] To achieve the above-mentioned purpose, the present invention first provides a filter, including a mesh body and a shell. The mesh body is generally in the shape of a hollow cylinder, with an embedded portion at the front end and an annular positioning portion at the end, the positioning portion extending from the end of the mesh body toward the direction away from the center of the mesh body, so that the outer diameter of the positioning portion is greater than the outer diameter of the mesh body. The interior of the shell is hollow, with a covering portion for covering the embedded portion, a connecting portion extending from the covering portion and used to support the mesh body, a main body connected to the other end of the connecting portion and opposite to the covering portion and used to fix the positioning portion, the inner wall surface of the main body has at least one first inner ring portion attached to the mesh body and a second inner ring portion extending from the first inner ring portion away from the mesh body, and the inner diameter of the second inner ring portion is greater than the inner diameter of the first inner ring portion, so that a stop surface mutually embedded with the positioning portion is formed between the first inner ring portion and the second inner ring portion, so that the mesh body is fixed to the shell.

[0007] In one embodiment, the shell is directly molded on the mesh body by injection molding, so that the mesh body and the shell are integrally molded.

[0008] In one embodiment, a plurality of ventilation holes are formed on the connecting portion, and the mesh body is exposed at the positions of the ventilation holes.

[0009] In one embodiment, the connecting portion is further composed of at least two supporting portions respectively extending between the covering portion and the main body portion, and the ventilation holes are distributed between the two supporting portions.

[0010] In one embodiment, the connecting portion further includes at least two reinforcing ribs respectively connected between the two supporting portions, and the vents are distributed between the two supporting portions and the two reinforcing ribs.

[0011] In one embodiment, the main body further includes an annular recess surrounding the main body.

[0012] To achieve the above-mentioned purpose, the present invention further provides a method for manufacturing a filter, the manufacturing method comprising: providing a mesh body, the mesh body is generally in the shape of a hollow cylinder, the front end has an embedded portion, the end has an annular positioning portion, the positioning portion extends from the end of the mesh body toward a direction away from the center of the mesh body, so that the outer diameter of the positioning portion is greater than the outer diameter of the mesh body. Providing a mold, the mold is composed of at least one first slider for the mesh body to be sleeved, a second slider inserted into the mesh body from the direction of the embedded portion and abutting against the first slider, an upper mold base and a lower mold base, when the mesh body is sleeved on the first slider and the second slider, the first slider and the second slider are inserted between the upper mold base and the lower mold base to form a molding space. And an injection molding step, injecting an insulating material into the molding space, and after cooling, forming a shell, so that the interior of the shell is hollow, and the shell has a covering part for covering the embedded part, a connecting part extending from the covering part and supporting the mesh body, and a main body connected to the other end of the connecting part and opposite to the covering part and fixing the positioning part, the inner wall surface of the main body has at least one first inner ring part attached to the mesh body and a second inner ring part extending from the first inner ring part toward a direction away from the mesh body, and the inner diameter of the second inner ring part is larger than the inner diameter of the first inner ring part, so that a stop surface embedded with the positioning part is formed between the first inner ring part and the second inner ring part, so that the mesh body is fixed on the shell to form a filter, and then the filter is taken out of the mold.

[0013] In one embodiment, a plurality of ventilation holes are formed on the connecting portion, and the mesh body is exposed at the positions of the ventilation holes.

[0014] In one embodiment, the connecting portion is further composed of at least two supporting portions respectively extending between the covering portion and the main body portion, and the ventilation holes are distributed between the two supporting portions.

[0015] In one embodiment, the connecting portion further includes at least two reinforcing ribs respectively connected between the two supporting portions, and the vents are distributed between the two supporting portions and the two reinforcing ribs.

[0016] Compared with the prior art, the present invention has the following advantages: the positioning portion formed at the end of the mesh body can ensure that the mesh body is effectively fixed in the mold when the shell is injection molded in the mold, thereby improving the qualified rate of finished products. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0018] Figure 2 It is a three-dimensional exploded schematic diagram of the present invention;

[0019] Figure 3 is a cross-sectional schematic diagram of the mesh body in the present invention;

[0020] Figure 4 is a cross-sectional schematic diagram of the housing in the present invention;

[0021] Figure 5 It is a cross-sectional schematic diagram of the present invention;

[0022] Figure 6 is a cross-sectional schematic diagram of the mold in the present invention;

[0023] Figure 7 for Figure 6 A partially enlarged schematic diagram of .

[0024] The symbols are marked as follows:

[0025] 10 Filters

[0026] 20 mesh body

[0027] 21 Embedded part

[0028] 22 Positioning unit

[0029] 30 Shell

[0030] 31. Coating

[0031] 32 Connection

[0032] 321 support part

[0033] 322 reinforcement rib

[0034] 323 vent

[0035] 33 body part

[0036] 331 First Inner Ring

[0037] 332 Second inner ring

[0038] 333 stop surface

[0039] 334 ring recess

[0040] 40 Mould

[0041] 41 First Slider

[0042] 411 Set Department

[0043] 412 stopper

[0044] 42 Second Slider

[0045] 43 Upper die seat

[0046] 44 lower die seat

[0047] 45 Forming space DETAILED DESCRIPTION

[0048] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0049] like Figures 1 to 5 As shown, the present invention first provides a filter. The filter 10 is composed of a mesh body 20 and a shell 30.

[0050] The mesh body 20 is generally in the shape of a hollow cylinder, with an embedded portion 21 at the front end and a positioning portion 22 formed at the end. The positioning portion 22 is formed by bending the end of the mesh body 20 outward, so that the positioning portion 22 extends from the end of the mesh body 20 toward a direction away from the center of the mesh body 20, and the outer diameter of the positioning portion 22 is larger than the outer diameter of the mesh body 20.

[0051] The housing 30 is directly integrally formed on the mesh body 20 by injection molding, and the interior of the housing 30 is generally hollow, and has a covering portion 31, a connecting portion 32, and a main body portion 33. The covering portion 31 is used to cover the embedded portion 21; the connecting portion 32 extends from the covering portion 31 and extends toward the extending direction of the mesh body 20, and is used to support the mesh body 20; the main body portion 33 is connected to the other end of the connecting portion 32, opposite to the covering portion 31, and is used to fix the positioning portion 22.

[0052] In this embodiment, the connecting portion 32 is further composed of at least two supporting portions 321 and at least two reinforcing ribs 322, each of the supporting portions 321 extends between the covering portion 31 and the main body portion 33, and each of the reinforcing ribs 322 is connected between the two supporting portions 321, so as to form a plurality of ventilation holes 323 on the connecting portion 32 that can expose the mesh body 20. In order to fix the positioning portion 22, the main body 33 has at least one first inner ring portion 331 and a second inner ring portion 332 formed on the inner wall surface of the main body 33. The first inner ring portion 331 is attached to the mesh body 20, and the second inner ring portion 332 extends from the first inner ring portion 331 in a direction away from the mesh body 20. The inner diameter of the second inner ring portion 332 is larger than the inner diameter of the first inner ring portion 331, so that a stop surface 333 that is interlocked with the positioning portion 22 is formed between the first inner ring portion 331 and the second inner ring portion 332. In addition, the main body 33 is further provided with an annular recess 334 surrounding the main body 33. The annular recess 334 can be used to provide an O-ring (which belongs to the prior art and is not shown in the figure), thereby enabling the filter 10 to achieve a sealed effect when installed in the aforementioned filter pressure reducing pneumatic valve (which belongs to the prior art and is not shown in the figure).

[0053] Thus, the shell 30 is firstly covered with the embedded part 21 by the covering part 31, and the mesh body 20 is supported by the connecting part 32, and then the stop surface 333 and the positioning part 22 are interlocked in the main body 33, so that the mesh body 20 can be more firmly fixed in the shell 30, and the aforementioned air source can pass through the vent hole 323 and the mesh body 20 to achieve the effect of filtering the aforementioned air source.

[0054] Another example Figures 1 to 7 In order to illustrate how the shell is integrally formed on the mesh body by injection molding, the present invention further provides a method for manufacturing the filter, which comprises: providing the aforementioned mesh body 20, providing a mold 40 and an injection molding step.

[0055] The mold 40 is composed of at least one first slider 41, a second slider 42, an upper mold base 43 and a lower mold base 44. The first slider 41 is used for the mesh body 20 to be sleeved thereon, and the first slider 41 has a sleeve portion 411 for the mesh body 20 to be sleeved thereon, and a stopper portion 412 extending from the sleeve portion 411 and having an outer diameter larger than the sleeve portion 411, so that after the mesh body 20 is sleeved on the sleeve portion 411, the stopper portion 412 can support the positioning portion 22, so that the mesh body 20 is effectively fixed on the sleeve portion 411. The second slider 42 is disposed at the front end of the sleeve portion 411, so that the embedded portion 21 of the mesh body 20 surrounds the outside of the second slider 42, and a gap is formed between the embedded portion 21 and the second slider 42. The first slider 41 and the second slider 42 on which the mesh body 20 is sleeved are placed between the upper die base 43 and the lower die base 44 , and a molding space 45 having the same shape as the housing 30 is formed in the mold 40 .

[0056] The injection molding step is to inject a plastic material into the molding space 45 by injection molding, and the plastic material is cooled inside the molding space 45 to form the aforementioned shell 30, so that the mesh body 20 and the shell 30 can achieve an integral molding effect.

[0057] It is worth mentioning that after the mesh body 20 is inserted into the first slider 41, its positioning portion 22 will form a mutual stop effect with the stop portion 412, and the upper mold base 43, the lower mold base 44 and the first slider 41 cooperate to clamp the mesh body 20 in the mold 40. Therefore, when the plastic material is injected into the molding space 45, the mesh body 20 can be effectively prevented from being affected by the injection pressure generated inside the mold 40, so that during the injection molding process of the plastic material, the mesh body 20 can be effectively fixed on the first slider 41, and then achieve an integrated molding effect with the shell 30, thereby improving the finished product qualification rate of the filter 10 to form a filter 10 with better reliability.

[0058] The specific embodiments described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A filter is installed in a filter pressure reducing pneumatic valve, the filter comprising: A mesh body, which is generally in the shape of a hollow cylinder, has an embedded portion at the front end and an annular positioning portion at the end, the positioning portion extending from the end of the mesh body toward a direction away from the center of the mesh body, so that the outer diameter of the positioning portion is larger than the outer diameter of the mesh body; and A shell is hollow inside and has a covering portion for covering the embedded portion, a connecting portion extending from the covering portion and used to support the mesh body, and a main body connected to the other end of the connecting portion and opposite to the covering portion and used to fix the positioning portion. The inner wall surface of the main body has at least one first inner ring portion attached to the mesh body and a second inner ring portion extending from the first inner ring portion toward a direction away from the mesh body, and the inner diameter of the second inner ring portion is larger than the inner diameter of the first inner ring portion, so that a stop surface embedded with the positioning portion is formed between the first inner ring portion and the second inner ring portion, so that the mesh body is fixed to the shell.

2. The filter according to claim 1, wherein The shell is directly formed on the mesh body by injection molding, so that the mesh body and the shell are integrally formed.

3. The filter according to claim 1, wherein A plurality of vent holes are formed on the connecting portion, and the mesh body is exposed at the positions of the vent holes.

4. The filter according to claim 3, wherein: The connecting portion is further composed of at least two supporting portions respectively extending between the covering portion and the main body portion, and the ventilation holes are distributed between the two supporting portions.

5. The filter according to claim 4, wherein The connecting portion further includes at least two reinforcing ribs respectively connected between the two supporting portions, and the vents are distributed between the two supporting portions and the two reinforcing ribs.

6. The filter according to claim 1, wherein The main body further includes an annular recess surrounding the main body.

7. A method for manufacturing a filter, the method comprising: A mesh body is provided, which is generally in the shape of a hollow cylinder, has an embedded portion at the front end, and has an annular positioning portion at the end, the positioning portion extending from the end of the mesh body toward a direction away from the center of the mesh body, so that the outer diameter of the positioning portion is larger than the outer diameter of the mesh body; A mold is provided, the mold comprising at least one first slider for the mesh body to be sleeved, a second slider inserted into the mesh body from the embedded portion and abutting against the first slider, an upper mold base and a lower mold base. When the mesh body is sleeved on the first slider and the second slider, the first slider and the second slider are inserted between the upper mold base and the lower mold base to form a molding space; and An injection molding step is provided, wherein an insulating material is injected into the molding space, and after cooling, a shell is formed so that the interior of the shell is hollow, and the shell has a covering portion for covering the embedded portion, a connecting portion extending from the covering portion and used to support the mesh body, and a main body portion connected to the other end of the connecting portion and opposite to the covering portion and used to fix the positioning portion. The inner wall surface of the main body portion has at least one first inner ring portion attached to the mesh body and a second inner ring portion extending from the first inner ring portion away from the mesh body, and the inner diameter of the second inner ring portion is larger than the inner diameter of the first inner ring portion, so that a stop surface mutually embedded with the positioning portion is formed between the first inner ring portion and the second inner ring portion, and the mesh body is fixed on the shell to form a filter, and then the filter is taken out of the mold.

8. The method for manufacturing a filter according to claim 7, wherein: A plurality of vent holes are formed on the connecting portion, and the mesh body is exposed at the positions of the vent holes.

9. The method for manufacturing a filter according to claim 8, wherein: The connecting portion is further composed of at least two supporting portions respectively extending between the covering portion and the main body portion, and the ventilation holes are distributed between the two supporting portions.

10. The method for manufacturing a terminal module according to claim 9, wherein: The connecting portion further includes at least two reinforcing ribs respectively connected between the two supporting portions, and the vents are distributed between the two supporting portions and the two reinforcing ribs.

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