Integrated sealing strip and mold for manufacturing same
By designing a plastic strip seal with a conical sleeve featuring internal teeth, the problem of traditional seals requiring manual insertion into an iron core was solved, achieving cost savings and improved fixation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- DONGGUAN BAIWEIBO PLASTIC HARDWARE PROD CO LTD
- Filing Date
- 2026-03-11
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional seals require a core to be manually inserted into the insertion hole during production, which increases material costs and hinders cost savings for businesses.
An integrated sealing strip was designed, using a plastic strip with multiple frustum-shaped protrusions and a conical sleeve. The conical sleeve has internal teeth forming a deformation hole, allowing the plastic strip to be bent and inserted, and forming a backstop function through the internal teeth, thus replacing the iron core.
It saves on production costs, avoids the use of iron cores, and the plastic strips are firmly fixed to prevent shaking.
Smart Images
Figure CN122035449A_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of sealing technology, and in particular relates to an integral seal and a mold for manufacturing the seal. Background Technology
[0002] Traditional seals are injection molded from PP plastic. The seal body extends from a plastic strip and includes an insertion hole with an iron core. This iron core includes a deformation hole with a locking function. The plastic strip is inserted into this deformation hole for wire binding. These seals are widely used in industrial information management, logistics management, and product packaging. However, current seal production requires manually inserting the iron core into the insertion hole. In actual production, this main component, the iron core, needs to be inserted into each seal individually. This additional material cost of the iron core increases production costs for companies, hindering cost savings and profit generation. Summary of the Invention
[0003] The purpose of this application is to provide an integrated seal that avoids the use of an iron core, thereby saving raw material costs and solving the problems existing in the prior art.
[0004] To achieve the above objectives, this application employs the following technical solution:
[0005] An integrated seal includes a seal head with an integrally formed plastic strip extending from one side. The plastic strip has multiple frustum-shaped protrusions aligned on it, and the plastic strip passes sequentially through the center of each protrusion. The diameter of each protrusion gradually decreases along the extension direction of the plastic strip. The seal head has a tapered sleeve with a radius that gradually decreases from top to bottom. The tapered sleeve has several internal teeth and openings at the top and bottom. The internal teeth surround the sidewall of the tapered sleeve and form deformable holes. The plastic strip can be bent and inserted into the deformable holes. The width of each protrusion is equal to the diameter of the bottom outlet of the tapered sleeve.
[0006] Furthermore, a limiting block is provided at the junction of the plastic strip and the sealing strip head.
[0007] Furthermore, the sealing head is a label plate that can be attached with a label, and the conical sleeve is located on one side of the sealing head.
[0008] Furthermore, the diameter of the end of the plastic strip is smaller than the diameter of the main body of the plastic strip.
[0009] Furthermore, the upper and lower openings of the tapered sleeve have the same diameter.
[0010] This application also discloses a mold for manufacturing the above-mentioned one-piece seal, including a first mold and a second mold. The first mold is used to form a plastic strip and a seal head, and the first mold can form a straight cylindrical sleeve with internal teeth on the seal head. The second mold is used to form the straight cylindrical sleeve into a conical sleeve.
[0011] Furthermore, the first mold includes a base plate, an ejector plate, a first lower mold, a first upper mold, a sprue plate, and a panel. The first upper mold and the first lower mold have multiple injection cavities. Each injection cavity of the first lower mold is provided with a first recess for forming the protrusion, a first column for forming the straight sleeve, and a second recess for forming the sealing strip head. The first recess is a frustum-shaped structure, and the first column is located in the second recess. The first upper mold is provided with the first recess corresponding to the position and a gate is provided between each first recess and the first column. The ejector plate is provided with ejector pins aligned with the first column.
[0012] Furthermore, the first column contains a second column and a trapezoidal cavity formed between the inner wall of the first column and the second column, one of the waists of the trapezoidal cavity being arc-shaped and the trapezoidal cavity being used to form the internal tooth.
[0013] Furthermore, the second mold includes a plurality of punches, each punch having a stamping cavity formed therein. The stamping cavity is shaped like a frustum and has a bottom surface that is far from the opening and has an area smaller than the opening. The bottom surface is provided with a support column protruding toward the opening.
[0014] The embodiments of this application have the following beneficial effects:
[0015] This application utilizes the aforementioned mold to form a conical sleeve with internal teeth. Multiple internal teeth constitute a deformation hole with an anti-reverse function, replacing the iron core in existing seals and saving material costs during production. Furthermore, the conical sleeve can secure the protruding plastic strip, preventing it from wobbling. Attached Figure Description
[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0017] Figure 1 This is a schematic diagram of the structure of this application;
[0018] Figure 2 This is a cross-sectional structural diagram of the plastic strip inserted into the conical sleeve in this application;
[0019] Figure 3This is a schematic diagram of the structure of the first upper mold and the first lower mold in the first mold of this application;
[0020] Figure 4 This is a cross-sectional view of the first column in the first mold of this application.
[0021] Figure 5 A schematic diagram of the cylindrical seal structure obtained by the first mold of this application;
[0022] Figure 6 This is a schematic diagram of the punch structure in the second mold of this application.
[0023] The above figures include the following reference numerals:
[0024] 1. Sealing strip head; 2. Conical sleeve; 3. Plastic strip; 4. Protrusion; 5. End; 6. Limiting block; 7. Internal teeth; 8. Deformation hole; 9. Straight sleeve;
[0025] 10. First upper mold; 11. Gate; 20. First lower mold; 21. First recess; 22. First column; 221. Second column; 222. Trapezoidal space; 23. Second recess; 31. Punch; 32. Stamping cavity; 33. Support column. Detailed Implementation
[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.
[0027] To keep the following description of the embodiments of this application clear and concise, detailed descriptions of known functions and known components are omitted.
[0028] Please see Figure 1 and Figure 2As shown, this embodiment provides an integrated seal, including a seal head 1, with an integrally formed plastic strip 3 extending from one side of the seal head 1. The plastic strip 3 has multiple frustum-shaped protrusions 4 aligned and arranged, with the plastic strip 3 passing sequentially through the center of each protrusion 4. The seal head 1 has a conical sleeve 2 penetrating the upper and lower bottom surfaces of the seal head 1, with openings at the top and bottom of the conical sleeve 2. The conical sleeve 2 extends downward from the lower bottom surface of the seal head 1, providing several internal teeth 7. These internal teeth 7, formed by injection molding, are distributed around the sidewall of the conical sleeve 2, with three teeth in total. The bottom ends of the three internal teeth 7 form deformation holes 8 with a backlash function. The plastic strip 3 can be bent and inserted into the deformation holes 8 under force. The end of the plastic strip 3 inserted into the conical sleeve 2 is pointed, and the diameter of the end 5 of the plastic strip 3 is smaller than the diameter of the main body of the plastic strip 3, so that the plastic strip 3 can easily pass through the deformation holes 8 when initially inserted. The diameter of each frustum-shaped protrusion 4 gradually decreases along the extension direction of the plastic strip 3. Since the internal teeth 7 are made of plastic, the protrusion 4 expands the deformation hole 8 formed by the internal teeth 7 when the plastic strip 3 is inserted into the deformation hole 8, increasing the inner diameter of the deformation hole 8. The greater the insertion force, the greater the expansion of the deformation hole 8, making it easier for the plastic strip 3 to be inserted into it. After one protrusion 4 has completely passed through the deformation hole 8, the deformation hole 8 contracts back to its original width. Therefore, when the plastic strip 3 is pulled out of the deformation hole 8, because the protrusion 4 has a frustum-shaped structure with a larger diameter at the top than at the bottom, the protrusion 4 abuts against the internal teeth 7 under the pulling force, fixing the position of the plastic strip 3 between the two protrusions 4, thus achieving the anti-retraction function. The width of the protrusion 4 is equal to the diameter of the bottom outlet of the conical sleeve 2. The portion of the plastic strip 3 extending from the conical sleeve 2 can be fixed through the bottom outlet of the conical sleeve 2 to prevent wobbling.
[0029] In addition, in this application, a limiting block 6 is provided at the connection between the plastic strip 3 and the sealing head 1 to prevent the entire plastic strip 3 from being inserted into the conical sleeve 2, and to leave space for scissors to pass through, so as to facilitate cutting the plastic strip 3. The sealing head 1 is a label plate that can be labeled, and the conical sleeve 2 is located on one side of the sealing head 1. The label plate area can be used for laser printing of text information or for pasting paper labels.
[0030] like Figure 3 , Figure 4 and Figure 5As shown, this application also discloses a mold for manufacturing the aforementioned integrated seal, including a first mold and a second mold. The first mold is used to form a plastic strip 3 and a seal head 1, and can form a straight cylindrical sleeve 9 with internal teeth 7 on the seal head 1. A second column 221 is provided inside the first column 22, and a trapezoidal cavity 222 is formed between the inner wall of the first column 33 and the second column 221. One side of the trapezoidal cavity 22 is arc-shaped, and the trapezoidal cavity 222 is used to form the internal teeth 7. The first mold includes a base plate, an ejector plate, a first lower mold 20, a first upper mold 10, a sprue plate, and a panel. The panel and base plate are used to fix the first upper mold 10 and the first lower mold 20, respectively, multiple injection cavities. The mirror-symmetrical injection cavities form the preliminary shape of the integrated seal disclosed in this application after mold closing, and the sleeve of this preliminary shape is a straight cylindrical sleeve 9 with internal teeth 7. Each injection cavity of the first lower mold 20 is provided with a first recess 21 for forming the protrusion 4, a first column 22 for forming the cylindrical sleeve 9, and a second recess 23 for forming the sealing strip head 1. The first recess 21 has a frustum-shaped structure, and the first column 22 is located inside the second recess 23. The first upper mold 10 is provided with corresponding first recesses 21, and a gate 11 is provided between each first recess 21 and the first column 22. The injection port is located at the center of the panel and is connected to each gate 11 through a sprue plate. When liquid plastic is poured into the first recess 21, the first recesses 21 aligned vertically after the first upper mold 10 and the second lower mold 40 are closed form the protrusion 4 of the integrated sealing strip. At the same time, the first column 22 separates the liquid plastic to form the cylindrical sleeve 9. The ejector plate is provided with ejector pins aligned with the first column 22. After injection molding is completed, the upper mold and the ejector plate are raised, and the ejector pins push out the integrated sealing strip with a preliminary shape.
[0031] like Figure 6 As shown, after manufacturing an integrated seal with a preliminary shape using the first mold, a second mold and a hot melt machine are needed to form the straight sleeve 9 into a conical sleeve 2. The second mold includes multiple punches 31, each punch 31 having a stamping cavity 32. The stamping cavity 32 is shaped like a frustum and has a bottom surface that is far from the opening and has a smaller area than the opening. A support column 33 protruding towards the opening is provided on the bottom surface. The shape of the stamping cavity 32 is sufficient to form the straight sleeve 9 into a conical sleeve 2. The height of the support column 33 is less than the depth of the stamping cavity 32 to prevent the part without internal teeth 7 from collapsing during the stamping process. The hot melt machine is used for heating, and its operating parameters are: heating temperature: 126 degrees Celsius; hot melt time: 20 seconds, or heating temperature: 121 degrees Celsius; hot melt time: 23 seconds. During hot melting, the second upper mold 30 is first placed at a certain distance above the seal to be processed, so that the temperature of the punch 31 preheats the seal, and then hot melting is performed to improve the molding quality.
[0032] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms 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 on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.
Claims
1. An integrated seal, characterized in that: The device includes a sealing strip head, one side of which extends an integrally formed plastic strip. Multiple frustum-shaped protrusions are aligned on the plastic strip, and the plastic strip passes sequentially through the center of each protrusion. The diameter of each protrusion gradually decreases along the extension direction of the plastic strip. The sealing strip head has a tapered sleeve with a radius that gradually decreases from top to bottom. The tapered sleeve has several internal teeth and is open at both ends. The internal teeth surround the sidewall of the tapered sleeve and form deformable holes. The plastic strip can be bent and inserted into the deformable holes. The width of each protrusion is equal to the diameter of the bottom outlet of the tapered sleeve.
2. The integrated seal as described in claim 1, characterized in that: A limiting block is provided at the junction of the plastic strip and the sealing strip head.
3. The integrated seal as described in claim 1, characterized in that: The sealing head is a label plate that can be attached with a label, and the conical sleeve is located on one side of the sealing head.
4. The integrated seal as described in claim 1, characterized in that: The diameter of the end of the plastic strip is smaller than the diameter of the main body of the plastic strip.
5. The integrated seal as described in claim 1, characterized in that: The upper and lower openings of the tapered sleeve have the same diameter.
6. A mold for manufacturing the one-piece seal as described in claim 1, characterized in that: It includes a first mold and a second mold. The first mold is used to form a plastic strip and a sealing strip head, and the first mold can form a straight cylindrical sleeve with internal teeth on the sealing strip head. The second mold is used to form the straight cylindrical sleeve into a conical sleeve.
7. The mold as described in claim 6, characterized in that: The first mold includes a base plate, an ejector plate, a first lower mold, a first upper mold, a sprue plate, and a panel. The first upper mold and the first lower mold have multiple injection cavities. Each injection cavity of the first lower mold is provided with a first recess for forming the protrusion, a first column for forming the straight sleeve, and a second recess for forming the sealing strip head. The first recess is a frustum-shaped structure, and the first column is located in the second recess. The first upper mold is provided with the first recess corresponding to the position, and a gate is provided between each first recess and the first column. The ejector plate is provided with ejector pins aligned with the first column.
8. The mold as described in claim 7, characterized in that: The first column contains a second column and a trapezoidal cavity formed between the inner wall of the first column and the second column. One side of the trapezoidal cavity is arc-shaped and the trapezoidal cavity is used to form the internal tooth.
9. The mold as described in claim 6, characterized in that: The second mold includes multiple punches, each punch having a stamping cavity. The stamping cavity is shaped like a frustum and has a bottom surface that is far from the opening and has an area smaller than the opening. The bottom surface is provided with a support column that protrudes toward the opening.