Patent Application
20240123381
The disclosure relates to a chemical filter, and more particularly to a reinforced top cover structure for a chemical filter.
Barrel top covers of conventional chemical filters are mostly plastic injection molded using one or more metal molds, or are formed through a CNC (Computer Numerical Control) plastic machining process. The injection-type barrel top cover must have a certain thickness and be reinforced with a plurality of reinforcing ribs that can resist increased internal pressure in the barrel to reduce deformation, which thereby prevents the bursting of the barrel due to severe deformation. The CNC plastic machining-type barrel top cover relies on its own thickness or an added metal plate, which is mounted externally onto the top of the CNC machining-type barrel top cover and is fastened by plastic engaging locks (the metal plate does not contact the barrel or chemical liquid therein) to resist deformation from the high pressure within the barrel.
A conventional chemical filter disclosed in Taiwan Utility Model Patent Certificate No. M598725 includes a body, a filter mounted in the body, a top cover openably covering the top of the body, and a plurality of fastening units pivoted to an outer periphery of the body and abutting against the top cover. When the conventional chemical filter is assembled, the fastening units are used to fasten the top cover to the body.
Although, the above chemical filter can achieve its intended purpose, because the top cover is made of only one layer of plastic material, the top cover may be easily deformed and damaged by the high pressure required to filter chemical waste liquid.
Therefore, an object of the disclosure is to provide a reinforced top cover structure for a chemical filter that can alleviate at least one of the drawbacks of the prior art.
According to the disclosure, the reinforced top cover structure includes a core board, a plurality of positioning pillars, and a cover member.
The core board is made of a metal material, and has a bottom surface, a top surface opposite to the bottom surface, an annular peripheral surface extending between the bottom surface and the top surface, a plurality of positioning holes extending from the bottom surface to the top surface, and a plurality of notches spaced apart from each other and extending inwardly from the annular peripheral surface.
Each positioning pillar is positioned on/in the core board, and has a middle section that extends through a corresponding one of the positioning holes, a lower positioning part that is connected to the middle section and extends downwardly from the bottom surface of the core board, and an upper section that is connected to the middle section and extends upwardly from the top surface of the core board.
The cover member is made of an injection molded plastic material, covers the core board, and has an outer peripheral surface that surrounds the annular peripheral surface of the core board, and a plurality of engaging grooves that are formed in the outer peripheral surface and that correspond respectively to the notches in position.
Other features and advantages of the disclosure will become apparent in the following detailed description of the embodiment(s) with reference to the accompanying drawings. It is noted that various features may not be drawn to scale.
Before the disclosure is described in greater detail, it should be noted that where considered appropriate, reference numerals or terminal portions of reference numerals have been repeated among the figures to indicate corresponding or analogous elements, which may optionally have similar characteristics.
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Before the cover member 30 of the reinforced top cover structure 100 is molded, the positioning pillars 20 must be pre-assembled to the core board 10. More specifically, referring again to
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After the reinforced top cover structure 100 is made, the contour of the annular peripheral surface 13 of the core board 10 does not exceed the contour of the outer peripheral surface 331 of the cover member 30. The core board 10 is completely covered by the cover member 30. The bottom end surface 221 of the lower positioning part 22 of each positioning pillar 20 does not protrude out of the lower side wall 31, and the top end surface 214 of the upper section 212 of each positioning pillar 20 does not protrude out of the upper side wall 32. Since the injection molded plastic material forming the cover member 30 is extruded into the outer annular grooves 225, 216 in each positioning pillar 20, an anchoring effect between the cover member 30 and the positioning pillars 20 can be increased. In addition, the injection molded plastic material forming the cover member 30 is extruded into the through holes 15 to serve as the connecting portions 35. The lower side wall 31, the upper side wall 32, the outer annular wall 33, the shaft tube portion 34 and the connecting portions 35 are made of injection molded plastic material forming the cover member 30 and are integrally connected to form one piece, such that a firm joint between the core board 10 and the cover member 30 can be established.
Therefore, in the injection process of the cover member 30, by using the metal-made core board 10 and the positioning pillars 20, a laminated structure constituted by the cover member 30 and the core board 10 can be obtained, and the overall structural strength of the reinforced top cover structure 100 can be enhanced, so that the positioning effect of the core board 10 in the injection process may be increased and the quality of the reinforced top cover structure (100) can be enhanced.
It is worth to mention herein that each positioning pillar 20 of the above embodiment of the disclosure has the upper positioning part 21, and a lower positioning part 22 that is detachable from the upper positioning part 21. However, in other embodiments, each positioning pillar 20 may be manufactured as one piece (not shown) if the positioning pillars 20 are fastened to the core board 10 via pressing.
Furthermore, since the reinforced top cover structure 100 of the disclosure cooperates with the fastening units 3 to provide a locking mechanism and since the core board 10 as the metal interlayer is rigid enough to resist internal pressure in the filter barrel unit 1 without deforming, the reinforced top cover structure 100 can be prevented from cracking due to inflation and deformation from the inner pressure in the filter barrel unit 1, and this can indeed solve the problem of bursting which occurs with regularity in existing top covers formed by plastic injection molding or through the CNC plastic machining process.
In summary, the entire reinforced top cover structure 100 of the present disclosure is simple, and can be easily manufactured and assembled. The object of the disclosure can indeed be achieved.
In the description above, for the purposes of explanation, numerous specific details have been set forth in order to provide a thorough understanding of the embodiment(s). It will be apparent, however, to one skilled in the art, that one or more other embodiments may be practiced without some of these specific details. It should also be appreciated that reference throughout this specification to “one embodiment,” “an embodiment,” an embodiment with an indication of an ordinal number and so forth means that a particular feature, structure, or characteristic may be included in the practice of the disclosure. It should be further appreciated that in the description, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of various inventive aspects; such does not mean that every one of these features needs to be practiced with the presence of all the other features. In other words, in any described embodiment, when implementation of one or more features or specific details does not affect implementation of another one or more features or specific details, said one or more features may be singled out and practiced alone without said another one or more features or specific details. It should be further noted that one or more features or specific details from one embodiment may be practiced together with one or more features or specific details from another embodiment, where appropriate, in the practice of the disclosure.
While the disclosure has been described in connection with what is considered the exemplary embodiment, it is understood that this disclosure is not limited to the disclosed embodiment but is intended to cover various arrangements included within the spirit and scope of the broadest interpretation so as to encompass all such modifications and equivalent arrangements.
