A venting device for a fragile lid foam mold
By installing a detachable adapter plate-type venting device on the foaming mold, the length of the venting channel is increased and the amount of overflow is controlled, which solves the problems of poor venting effect and overflow control of existing molds, and achieves efficient production and convenient maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUBEI SANJIANG AEROSPACE WANFENG TECH DEV
- Filing Date
- 2025-07-23
- Publication Date
- 2026-07-17
Smart Images
Figure CN224510231U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the technical field of fragile cap foam molds, and more specifically, relates to an exhaust device for a fragile cap foam mold. Background Technology
[0002] The fragile lid is one of the most widely used and applied box lids. It is lightweight and high-strength, and can be opened by elastic force or shock wave, eliminating the need for electronic unpacking. As a result, it has been widely used in many fields.
[0003] Fragile caps are typically manufactured using foam molding. When materials like rigid polyurethane are molded within the cavity of the fragile cap foam mold, a large amount of gas is generated. This gas should be promptly vented through the mold's venting channels. In existing technologies, venting holes (or venting grooves) are usually machined into the mold to solve this venting problem. However, further research has revealed the following defects or shortcomings in existing technologies:
[0004] First, polyurethane products generate significant expansion pressure during molding, and the resulting foam overflows from the mold's venting holes along with the gas. Since the weight of the product is subject to strict requirements, it is necessary to control the amount of overflow from the mold. However, the venting holes of current foaming molds cannot both ensure smooth venting of the product and accurately control the amount of overflow.
[0005] Secondly, existing foaming molds mostly use cast aluminum or steel parts. The venting effect of the mold is mainly affected by factors such as the diameter, length and smoothness of the venting holes. Once the diameter, length and smoothness of the venting holes are determined, they are not easy to change. However, in actual production, the density of rigid polyurethane products often changes. If the product density increases, the foaming pressure will increase significantly. If the original venting holes are still used, the overflow of the mold will also increase, resulting in the product weight not being guaranteed. Therefore, it is necessary to seal and repair the venting holes of the mold and then reopen them. This not only involves a large amount of work, but repeated repairs will also damage the structure and strength of the mold.
[0006] Accordingly, further research and improvement are urgently needed in this field to better meet the comprehensive needs of high-quality and efficient manufacturing of fragile cap foam. Utility Model Content
[0007] In response to one or more of the above-mentioned defects or needs of the prior art, this utility model provides a venting device for a fragile cap foaming mold. By detachably installing the venting device on the fragile cap foaming mold and making targeted improvements to the specific structural composition and setting of the venting device, the overall length of the venting channel of the foaming mold can be effectively increased. This improves the venting effect of the mold and effectively controls the amount of overflow in the mold. In addition, it has the advantages of compact structure, easy operation and convenient maintenance. It is especially suitable for the manufacturing of fragile caps made of rigid polyurethane materials of different densities.
[0008] To achieve the above objectives, according to this utility model, a venting device for a fragile cap foam mold is provided, wherein:
[0009] The exhaust device is in the form of an adapter plate and is detachably attached to the cover plate of the fragile cover foam mold;
[0010] The venting device has multiple through holes along the thickness direction of the adapter plate. These through holes correspond one-to-one with the multiple vent holes on the cover plate of the fragile foam mold. In addition, each of the through holes is detachably installed with a vent plug, and the center of each vent plug coincides with the center of each vent hole on the cover plate.
[0011] As a further preferred embodiment of this utility model, for the above-mentioned exhaust device, the center distance of the through hole is consistent with the center distance of the exhaust hole corresponding to the position.
[0012] As a further preferred embodiment of this invention, for the above-mentioned exhaust device, the length of the exhaust plug is slightly less than the depth of the corresponding through hole.
[0013] As a further preferred embodiment of the present invention, for the above-mentioned exhaust device, the exhaust plug is made of metal material and has multiple air holes uniformly machined along the axial direction.
[0014] As a further preferred embodiment of this invention, the exhaust device described above has four through holes, which are arranged at even intervals along the central axis.
[0015] As a further preferred embodiment of this utility model, the exhaust device is made of aluminum and has a length of 400mm, a width of 30mm, and a thickness of 12mm.
[0016] As a further preferred embodiment of this utility model, the depth of the through hole is 12mm and the length of the exhaust plug is 10mm.
[0017] As a further preferred embodiment of the present invention, the exhaust device further includes a clamp, which is respectively disposed on both horizontal sides of the exhaust device and is used to attach and fix the entire exhaust device to the cover plate of the fragile cover foam mold.
[0018] As a further preferred embodiment of this utility model, each component of the exhaust device is a modular structure that is easy to replace.
[0019] In summary, compared with the prior art, the above-described technical solution conceived by this utility model has the following main technical advantages:
[0020] (1) This utility model fully analyzes the actual working conditions and the reasons for overflow during the production of fragile cap foam mold. By designing a matching exhaust device and making targeted research and improvements on its specific structure and setting method, the overall length of the exhaust channel of the foam mold can be appropriately increased. While improving the exhaust effect, it also effectively controls the amount of overflow of the foam mold.
[0021] (2) The exhaust device of this utility model has a compact structure and is easy to operate. Even if the fragile cover is made of materials such as rigid polyurethane with different densities, there is no need to remake or repair the exhaust hole of the foaming mold. Just install the above exhaust device during the exhaust operation to ensure smooth exhaust of the mold and control the amount of overflow.
[0022] (3) The various components of the exhaust device of this utility model are easy to disassemble and replace, can be reused, and have good applicability. Therefore, it is especially suitable for the foaming processing of fragile caps made of materials with different densities. Attached Figure Description
[0023] Figure 1 This is an overall schematic diagram illustrating the installation of the venting device according to this utility model onto a fragile foam mold;
[0024] Figure 2 This is a cross-sectional view of the overall structure of an exhaust device according to a preferred embodiment of the present invention;
[0025] Figure 3 yes Figure 2 Top view of the exhaust device shown;
[0026] Figure 4 This is a schematic diagram of a cover plate used in a fragile lid foaming mold, which has multiple vent holes machined on it;
[0027] Figure 5 This is a perspective view of the exhaust plug according to another preferred embodiment of the present invention;
[0028] In all the accompanying drawings, the same reference numerals are used to denote the same elements or structures, wherein:
[0029] 11-Adapter plate; 12-Through hole; 13-Exhaust plug; 131-Vent hole; 21-Cover plate; 22-Exhaust hole; 3-Clamping plate. Detailed Implementation
[0030] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.
[0031] It should be understood that expressions such as "comprising" and "may include" as used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "comprising" and / or "having" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but should not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.
[0032] It should be understood that the terms “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “inner,” “outer,” “clockwise,” “counterclockwise,” “axial,” “radial,” and “circumferential” indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.
[0033] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0034] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.
[0035] Figure 1 This is an overall schematic diagram illustrating the installation of the venting device according to this utility model onto a fragile foam mold. Figure 2 This is a cross-sectional view of the overall structure of an exhaust device according to a preferred embodiment of the present invention. (See below for further details.) Figure 1 and Figure 2 To explain this utility model in more detail.
[0036] like Figure 1 As shown, the exhaust device of this utility model is in the form of a transition plate 11 and is detachably attached to the cover plate 21 of the fragile cover foam mold.
[0037] The venting device has multiple through holes 12 along the thickness direction of the adapter plate 11. These through holes 12 are respectively positioned to correspond one-to-one with multiple vent holes 22 on the cover plate 21 of the fragile product foaming mold. In addition, each of the through holes 12 is detachably installed with a vent plug 13, and the center of each vent plug 13 is respectively aligned with the center of each vent hole 22 on the cover plate 21.
[0038] Based on the above concept, in the process of manufacturing fragile caps using foam molds, the aforementioned venting device in the form of an adapter plate can be directly attached to the cover plate of the foam mold before the product is foamed. Multiple vent plugs on the adapter plate are aligned with the vent holes on the cover plate itself. This increases the overall length of the venting channel in the foam mold without replacing it, thus increasing the resistance to overflow and improving venting efficiency while effectively controlling excessive overflow. Furthermore, even if the fragile cap is made of materials such as rigid polyurethane of different densities, there is no need to remake or repair the vent holes in the foam mold. Simply adding the aforementioned venting device during the venting operation ensures smooth mold venting and controls overflow, while also offering advantages such as ease of operation, high venting efficiency, and convenient maintenance.
[0039] According to a preferred embodiment of the present invention, for the above-mentioned exhaust device, the center distance of the through hole 12 is consistent with the center distance of the exhaust hole 22 corresponding to the position.
[0040] According to another preferred embodiment of the present invention, for the above-mentioned exhaust device, the length of the exhaust plug 13 is slightly less than the depth of the corresponding through hole 12.
[0041] More specifically, see also Figure 3 and Figure 4For the aforementioned exhaust device, the number of through holes 12 is preferably four, and they are arranged at even intervals along the central axis. Furthermore, the exhaust device may be made of aluminum, and its length is preferably 400 mm, its width 30 mm, and its thickness 12 mm. Correspondingly, the depth of the through holes 12 is preferably 12 mm, and the length of the exhaust plug 13 is preferably 10 mm.
[0042] According to another preferred embodiment of the present invention, see Figure 5 For the above-mentioned exhaust device, the exhaust plug 13 is made of metal material and has a plurality of air holes 131 uniformly machined along the axial direction.
[0043] According to another preferred embodiment of the present invention, the exhaust device further includes a retainer 3, which is respectively disposed on both horizontal sides of the exhaust device and is used to attach and fix the entire exhaust device to the cover plate 21 of the fragile cover foam mold.
[0044] In addition, all components of the aforementioned exhaust system are modular structures that are easy to replace.
[0045] The following will explain a specific embodiment of this utility model. Specific Implementation Example 1
[0047] First, process an aluminum adapter plate with dimensions of 400mm (length) × 30mm (width) × 12mm (height). Drill four φ10.1mm through holes on the adapter plate, ensuring that the center distance between the through holes on the adapter plate is consistent with the center distance between the vent holes on the mold cover plate.
[0048] Next, install a 10mm long φ10mm vent plug into the hole of the adapter plate.
[0049] Next, the adapter plate is fixed to the fragile cap foam mold using a clamp, and one side of the adapter plate should be in contact with the mold cover plate, ensuring that the center of the vent plug is basically coincident with the center of the vent hole of the mold cover plate.
[0050] After the fragile cap foaming mold has finished foaming, remove the adapter plate, take off the vent plug on the adapter plate, and replace it with a new vent plug.
[0051] Through actual testing of the above specific embodiment 1, it was found that the fragile cap foam mold, after adopting this venting device, can adapt to 0.1g / cm³. 3 ~0.45g / cm 3 It can mold materials such as rigid polyurethane of various densities within a certain range, and the overflow can be controlled within 50g. While ensuring smooth venting of the mold during the product molding process, it can also accurately control the weight of the product.
[0052] In summary, the venting device according to this utility model can appropriately increase the overall length of the venting channel of the foaming mold, which not only improves the venting effect of the mold but also effectively controls the amount of overflow in the mold. In addition, it has the advantages of compact structure, easy operation and convenient maintenance. It is especially suitable for the manufacturing of fragile caps of rigid polyurethane materials of different densities, and therefore has good practical value and application prospects.
[0053] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A venting device for a fragile cap foam mold, characterized in that: The exhaust device is in the form of an adapter plate (11) and is detachably attached to the cover plate (21) of the fragile cover foam mold; The venting device has multiple through holes (12) along the thickness direction of the adapter plate (11). These through holes (12) correspond one-to-one with the multiple vent holes (22) on the cover plate (21) of the fragile product foaming mold. In addition, each of the through holes (12) is detachably installed with a vent plug (13), and the center of each vent plug (13) coincides with the center of each vent hole (22) on the cover plate (21).
2. The venting device for the fragile cap foam mold as described in claim 1, characterized in that, For the above-mentioned exhaust device, the center hole distance of the through hole (12) is consistent with the center hole distance of the exhaust hole (22) corresponding to the position.
3. The venting apparatus for a blister pack of frangible covers as defined in claim 2, wherein, For the above-mentioned exhaust device, the length of the exhaust plug (13) is slightly less than the depth of the corresponding through hole (12).
4. The venting apparatus for a blister pack of frangible covers of claim 3, wherein, For the above-mentioned exhaust device, the exhaust plug (13) is made of metal material and has a plurality of air holes (131) uniformly machined along the axial direction.
5. The venting device for the fragile cap foam mold as described in claim 4, characterized in that, For the above-mentioned exhaust device, there are four through holes (12), which are evenly spaced along the central axis.
6. The venting apparatus for a blister mold of a frangible cap as defined in any one of claims 1 to 5, wherein The exhaust device is made of aluminum and is 400mm long, 30mm wide, and 12mm thick.
7. The venting apparatus for a blister pack of frangible covers of claim 6, wherein, The depth of the through hole (12) is 12 mm, and the length of the exhaust plug (13) is 10 mm.
8. The venting apparatus for a blister mold of a frangible cap as defined in any one of claims 1 to 5, wherein The above-mentioned exhaust device also includes a clasp (3), which is respectively disposed on the horizontal sides of the exhaust device and is used to attach and fix the entire exhaust device to the cover plate (21) of the fragile cover foam mold.
9. The venting apparatus for a blister pack of frangible covers of claim 8, wherein, All components of the aforementioned exhaust system are modular structures that are easy to replace.