Sealing cap plastic mold
By designing an upper cover and support structure in the plastic mold of the sealing cap, combined with an ejector mechanism driven by a plug, spring, and motor, the problem of inconvenient removal and replacement of the mold core is solved, realizing convenient installation and demolding of the mold core, and improving operating efficiency and stability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG TAIXIN PLASTIC MOULD CO LTD
- Filing Date
- 2025-06-11
- Publication Date
- 2026-06-09
AI Technical Summary
The current method of fixing the mold core in plastic molds makes it inconvenient to remove, maintain or replace, and demolding is difficult.
A sealing cap plastic mold was designed, which adopts a top cover and support structure. The mold core is limited and removed by the cooperation of the insert block and spring. Combined with the motor-driven ejection mechanism, the mold core is easy to install and remove. The top cover is stably positioned and the sleeve is demolded by the positioning pin and thread structure.
It enables convenient installation and replacement of mold cores, improves demolding efficiency, simplifies the maintenance process, and enhances the stability and ease of operation of molds.
Smart Images

Figure CN224334788U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of mold technology, specifically to a plastic mold for sealing caps. Background Technology
[0002] Plastic molds are tools used in the plastics processing industry, working in conjunction with plastic molding machines to give plastic products their complete shape and precise dimensions. Due to the wide variety of plastic types and processing methods, and the varying complexity of plastic molding machines and products, plastic molds also come in a wide variety of types and structures. Plastic molds are required in the production of sealing caps. The mold core is typically fixed to the mold with bolts or is an integral part of the mold, making it inconvenient to remove the mold core for maintenance or replacement. Utility Model Content
[0003] In view of the problems in the prior art, this utility model provides a plastic mold for sealing caps.
[0004] The technical solution adopted by this utility model to solve its technical problem is a sealing cap plastic mold, including an upper cover, a support at the bottom of the upper cover, multiple grooves inside the upper cover, each groove containing a mold core, multiple slots at the top of the support that fit the mold core, an ejection mechanism inside the support, handles fixed on both sides of the upper cover, insert blocks on both sides of the upper cover, two guide rods fixed on the opposite sidewalls of the two insert blocks, each guide rod fitted with a spring, two through holes on the two handles that fit the guide rods, a stop block fixed at the end of each guide rod away from the insert block, and slots on both sides of the support that fit the insert blocks.
[0005] By adopting the above technical solution, the top cover can limit the position of the mold core. If the mold core needs to be removed for maintenance or replacement, hold the two handles and push the two inserts to move in opposite directions. The ends of the two inserts will disengage from the slots on both sides of the support. The top cover can then be removed by lifting it up. At this time, the limiting of the mold core is released, making it convenient to remove the mold core for maintenance or replacement. During installation, place the mold core in the slot at the top of the support and push the two inserts to move in opposite directions. The spring will be compressed and contracted. After placing the top cover at the top of the support, release the two inserts. The spring will push the inserts to reset, and the ends of the two inserts will be inserted into the slots on both sides of the support, making it convenient to install the mold core.
[0006] Specifically, positioning posts are fixed at the four corners of the top of the support, and through holes adapted to the positioning posts are provided at the four corners of the top cover.
[0007] By adopting the above technical solution, the positioning column facilitates the positioning of the top cover.
[0008] Specifically, the ejection mechanism includes a motor, a sleeve, and a column. A motor is fixed to one side of the support. The output shaft of the motor is connected to a crossbar via a coupling. Multiple first bevel gears are fixed on the crossbar. Multiple bearing seats are fixed inside the support. A column is fixed inside each bearing seat. A second bevel gear adapted to the first bevel gear is fixed to the bottom end of each column. A sleeve is fitted on each column. The inner wall of each sleeve is provided with internal threads. Each column is provided with external threads adapted to the internal threads of the sleeve. Each mold core is provided with a through hole adapted to the sleeve.
[0009] By adopting the above technical solution, after the sealing cover in the groove is formed, the output shaft of the motor drives the crossbar to rotate, and the first bevel gear rotates accordingly. When the first bevel gear rotates, it drives the second bevel gear to rotate. When the second bevel gear rotates, the column rotates accordingly. With the cooperation of the external thread on the column and the internal thread on the inner wall of the sleeve, the sleeve moves upward. The sleeve can push out the sealing cover in the groove, which is conducive to demolding and material removal.
[0010] Specifically, the end of the crossbar furthest from the motor is rotatably connected to the support.
[0011] By adopting the above technical solution, the crossbar is rotatably connected to the support, which improves the stability of the crossbar.
[0012] Specifically, both sides of the support are integrally formed with mounting plates, and both mounting plates are provided with multiple mounting holes.
[0013] By adopting the above technical solution, during installation, the bottom end of the bolt is passed through the mounting hole on the mounting plate, making it easy to fix the support in a suitable position.
[0014] The beneficial effects of this utility model are:
[0015] The sealing cap plastic mold of this utility model has an upper cover that can limit the mold core. If the mold core needs to be removed for maintenance or replacement, hold the two handles and push the two inserts to move in opposite directions. The ends of the two inserts will disengage from the slots on both sides of the support. The upper cover can then be removed by lifting it up. At this time, the limiting of the mold core is released, which facilitates the removal, maintenance or replacement of the mold core. During installation, place the mold core in the slot at the top of the support and push the two inserts to move in opposite directions. The spring is compressed and contracted. After placing the upper cover at the top of the support, release the two inserts. The spring pushes the inserts to reset, and the ends of the two inserts are inserted into the slots on both sides of the support, which facilitates the installation of the mold core.
[0016] In the plastic mold for the sealing cap described in this utility model, after the sealing cap in the groove is formed, the output shaft of the motor drives the crossbar to rotate, and the first bevel gear rotates accordingly. When the first bevel gear rotates, it drives the second bevel gear to rotate. When the second bevel gear rotates, the column rotates as well. With the cooperation of the external thread on the column and the internal thread on the inner wall of the sleeve, the sleeve moves upward. The sleeve can push out the sealing cap in the groove, which is conducive to demolding and material removal. Attached Figure Description
[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0018] Figure 1 This is a schematic diagram of the structure of this utility model;
[0019] Figure 2 This is a schematic diagram of the insert block of this utility model;
[0020] Figure 3 This is a cross-sectional view of the present invention.
[0021] In the diagram: 1. Top cover; 2. Support; 3. Motor; 4. Mounting plate; 5. Insert block; 50. Guide rod; 51. Stop block; 52. Spring; 6. Handle; 7. Mold core; 8. Positioning pin; 9. Sleeve; 10. Column; 11. Crossbar; 12. Bearing seat; 13. Ejection mechanism; 14. Second bevel gear; 15. First bevel gear. Detailed Implementation
[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0023] To facilitate the disassembly, maintenance, or replacement of the mold core 7, as one embodiment of this utility model, such as Figure 1 , Figure 2 , Figure 3 As shown, the sealing cap plastic mold of this utility model includes an upper cover 1, a support 2 at the bottom of the upper cover 1, multiple grooves in the upper cover 1, each groove containing a mold core 7, multiple slots at the top of the support 2 that are adapted to the mold core 7, an ejection mechanism 13 in the support 2, handles 6 welded and fixed on both sides of the upper cover 1, inserts 5 on both sides of the upper cover 1, two guide rods 50 welded and fixed on the opposite sidewalls of the two inserts 5, each guide rod 50 fitted with a spring 52, two through holes adapted to the guide rods 50 on the two handles 6, a stop block 51 welded and fixed at the end of each guide rod 50 away from the insert 5, and slots adapted to the inserts 5 on both sides of the support 2.
[0024] When in use, the top cover 1 can limit the mold core 7. If the mold core 7 needs to be removed for maintenance or replacement, hold the two handles 6 and push the two inserts 5 to move in opposite directions. The ends of the two inserts 5 will come out of the slots on both sides of the support 2. The top cover 1 can be removed by moving it up. At this time, the limitation on the mold core 7 is released, which makes it convenient to remove the mold core 7 for maintenance or replacement. When installing, place the mold core 7 in the slot at the top of the support 2 and push the two inserts 5 to move in opposite directions. The spring 52 will be compressed and contracted. After placing the top cover 1 at the top of the support 2, release the two inserts 5. The spring 52 will push the inserts 5 to reset. The ends of the two inserts 5 will be inserted into the slots on both sides of the support 2, which makes it convenient to install the mold core 7.
[0025] For ease of positioning of the top cover 1, for example, as shown... Figure 1 As shown, positioning posts 8 are welded and fixed at the four corners of the top of the support 2, and through holes adapted to the positioning posts 8 are provided at the four corners of the upper cover 1.
[0026] For easy demolding, for example, such as Figure 2 As shown, the ejection mechanism 13 includes a motor 3, a sleeve 9, and a column 10. The motor 3 is fixed to one side of the support 2 by bolts. The output shaft of the motor 3 is connected to a crossbar 11 via a coupling. Multiple first bevel gears 15 are fixed on the crossbar 11. Multiple bearing seats 12 are fixed inside the support 2 by bolts. A column 10 is fixed inside each bearing seat 12. A second bevel gear 14 adapted to the first bevel gear 15 is fixed to the bottom end of each column 10. A sleeve 9 is fitted on each column 10. The inner wall of each sleeve 9 is provided with internal threads. Each column 10 is provided with external threads adapted to the internal threads of the sleeve 9. Each mold core 7 is provided with a through hole adapted to the sleeve 9.
[0027] During use, after the sealing cap in the groove is formed, the output shaft of the motor 3 drives the crossbar 11 to rotate, and the first bevel gear 15 rotates accordingly. When the first bevel gear 15 rotates, it drives the second bevel gear 14 to rotate. When the second bevel gear 14 rotates, the column 10 rotates as well. With the cooperation of the external thread on the column 10 and the internal thread on the inner wall of the sleeve 9, the sleeve 9 moves upward. The sleeve 9 can push out the sealing cap in the groove, which is conducive to demolding and material removal.
[0028] To improve the stability of crossbar 11, for example, such as Figure 3 As shown, the end of the crossbar 11 away from the motor 3 is rotatably connected to the support 2 (existing technology).
[0029] To facilitate the fixing of support 2, for example, as shown... Figure 1 As shown, both sides of the support 2 are integrally formed with mounting plates 4, and both mounting plates 4 are provided with multiple mounting holes.
[0030] In use, the upper cover 1 can limit the mold core 7. Liquid plastic is poured into the groove on the upper cover. After the sealing cover is formed, the output shaft of the motor 3 drives the crossbar 11 to rotate. The first bevel gear 15 rotates accordingly. When the first bevel gear 15 rotates, it drives the second bevel gear 14 to rotate. When the second bevel gear 14 rotates, the column 10 rotates accordingly. With the cooperation of the external thread on the column 10 and the internal thread on the inner wall of the sleeve 9, the sleeve 9 moves upward. The sleeve 9 can push out the sealing cover in the groove, which is conducive to demolding and material removal.
[0031] If the mold core 7 needs to be removed for maintenance or replacement, hold the two handles 6 and push the two inserts 5 to move in opposite directions. The ends of the two inserts 5 will come out of the slots on both sides of the support 2. The upper cover 1 can be removed by moving it up. At this time, the restriction on the mold core 7 is released, making it convenient to remove the mold core 7 for maintenance or replacement.
[0032] During installation, place the mold core 7 in the slot at the top of the support 2, push the two insert blocks 5 to move in opposite directions, and the spring 52 will be compressed and contracted. After placing the top cover 1 at the top of the support 2, release the two insert blocks 5. The spring 52 will push the insert blocks 5 to reset, and the ends of the two insert blocks 5 will be inserted into the slots on both sides of the support 2, which facilitates the installation of the mold core 7.
[0033] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents. Contents not described in detail in this utility model are considered prior art known to those skilled in the art.
Claims
1. A plastic mold for sealing caps, characterized in that, The device includes a top cover (1), a support (2) at the bottom of the top cover (1), multiple grooves in the top cover (1), each groove containing a mold core (7), multiple slots adapted to the mold core (7) at the top of the support (2), an ejection mechanism (13) in the support (2), handles (6) fixed on both sides of the top cover (1), inserts (5) on both sides of the top cover (1), two guide rods (50) fixed on the opposite sidewalls of the two inserts (5), each guide rod (50) fitted with a spring (52), two through holes adapted to the guide rods (50) on the two handles (6), a stop block (51) fixed at the end of each guide rod (50) away from the insert (5), and slots adapted to the inserts (5) on both sides of the support (2).
2. The sealing cap plastic mold according to claim 1, characterized in that, The support (2) has a positioning post (8) fixed at each of the four corners of its top end, and the cover (1) has through holes at each of the four corners that are adapted to the positioning post (8).
3. The sealing cap plastic mold according to claim 1, characterized in that, The ejection mechanism (13) includes a motor (3), a sleeve (9) and a column (10). The motor (3) is fixed on one side of the support (2). The output shaft of the motor (3) is connected to a crossbar (11) via a coupling. Multiple first bevel gears (15) are fixed on the crossbar (11). Multiple bearing seats (12) are fixed inside the support (2). Each bearing seat (12) has a column (10) fixed inside. The bottom end of each column (10) is fixed with a second bevel gear (14) that matches the first bevel gear (15). Each column (10) is fitted with a sleeve (9). The inner wall of each sleeve (9) is provided with an internal thread. Each column (10) is provided with an external thread that matches the internal thread of the inner wall of the sleeve (9). Each mold core (7) is provided with a through hole that matches the sleeve (9).
4. The sealing cap plastic mold according to claim 3, characterized in that, The end of the crossbar (11) away from the motor (3) is rotatably connected to the support (2).
5. The sealing cap plastic mold according to claim 1, characterized in that, The support (2) has an integrally formed mounting plate (4) on both sides, and the two mounting plates (4) are provided with multiple mounting holes.