Plastic clothespin mold

Abstract

This utility model belongs to the field of mold technology, and particularly relates to a plastic clothespin mold. This utility model includes a lower mold and an upper mold for forming plastic clothespins. An injection molding main board is provided above the upper mold. A mold closing and alignment component is provided between the lower and upper molds. A forming cavity is provided within the lower mold. This utility model achieves simultaneous injection molding of the clothespin's slotted structure, anti-slip clamping surface, and rotating area connection structure during the injection molding process. Compared to traditional molds requiring secondary processing, production efficiency is significantly improved. Simultaneously, it avoids dimensional errors and surface damage that may be introduced during secondary processing, ensuring the dimensional accuracy and surface quality of each structure of the clothespin, improving the product's pass rate and stability, and making the clothespin's performance more reliable.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a plastic clothes clip mold. Background Technology

[0002] In existing plastic clothespin production processes, the molding of clothespins often presents numerous problems. Some molds cannot simultaneously mold the clothespin's perforated and slotted structure, the anti-slip clamping surface, and the connecting structure of the rotating area. This necessitates secondary processing of the semi-finished clothespin, such as drilling and milling to create the perforated and slotted structures, surface treatment to form the anti-slip clamping surface, and assembly to create the connecting structure of the rotating area. This secondary processing not only increases production steps and reduces efficiency but also significantly increases production costs, including labor costs, equipment depreciation costs, and time costs. Furthermore, secondary processing may introduce dimensional errors, affecting the overall quality and performance of the clothespin. Therefore, there is an urgent need to design a plastic clothespin mold that can overcome these shortcomings.

[0003] To overcome the shortcomings of existing technologies, people have continuously explored and proposed various solutions. For example, Chinese patent discloses a clamp mold [application number: 200720050552.9], which includes an upper back plate, an A plate, a slider, a wear-resistant block, a groove block, a B plate, a movable top block, a baffle, a square iron, an upper ejector plate, a lower ejector plate, a lower back plate, guide pillars, and inclined guide pillars. The A plate, slider, B plate, baffle, square iron, upper ejector plate, and lower ejector plate are installed between the upper and lower back plates. There are two groove blocks, which are installed at the upper and lower ends of the B plate respectively. There are two sliders, which are installed on both sides of the clamp mold respectively, and the wear-resistant block is installed on the slider. There are four guide pillars, which are symmetrically installed on the groove blocks. There are four inclined guide pillars, which are symmetrically arranged on the A plate. The B plate has four recessed holes, which match the four inclined guide pillars respectively. There are two movable top blocks, which are respectively inlaid on both sides of the B plate. The movable top block is a half-ejection. However, this solution is not suitable for producing plastic clothespins. It is difficult to simultaneously complete the molding of the clothespin's slotted structure, anti-slip clamping surface, and rotating area connection structure, resulting in numerous production steps and high costs. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a plastic clothespin mold.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A plastic clothespin mold includes a lower mold and an upper mold. An injection molding main board is provided above the upper mold. A mold closing and alignment component is provided between the lower and upper molds. The lower mold has a lower molding cavity, and the upper mold has an upper molding cavity. The lower and upper molds are directly opposite each other. The lower mold has a clothespin forming part, a rotating area forming recess, and an auxiliary forming protrusion. The upper mold has an embedded forming protrusion, a groove forming part, and a positioning convex shaft. The clothespin forming part and the rotating area forming recess correspond to the positions of the embedded forming protrusion. A clothespin hole groove forming structure is provided below the lower mold, penetrating through the lower mold.

[0007] In the aforementioned plastic clothespin mold, the clothespin hole groove forming structure includes a core-pulling fixing plate disposed below the lower mold of the plastic clothespin forming. The core-pulling fixing plate is provided with a clamp head hole groove forming rod and a clamp body hole groove forming rod. The clamp head hole groove forming rod corresponds to the position of the clothespin surface forming part, and the clamp body hole groove forming rod corresponds to the position of the auxiliary forming protrusion.

[0008] In the aforementioned plastic clothes clip mold, the core-pulling fixing plate is also provided with a clip tail through hole forming rod. The clip head hole groove forming rod, the clip body hole groove forming rod, and the clip tail through hole forming rod are parallel to each other, and the clip tail through hole forming rod is arranged opposite to the positioning convex shaft.

[0009] In the aforementioned plastic clothespin mold, the clothespin forming part includes a clothespin anti-slip forming surface disposed in the lower forming cavity, and the clothespin anti-slip forming surface is serrated.

[0010] In the aforementioned plastic clothespin mold, the rotating area forming recess includes a rotating support forming ring disposed in the lower forming cavity, and the rotating support forming ring corresponds to the position of the embedded forming protrusion.

[0011] In the aforementioned plastic clothespin mold, the embedded molding protrusion includes an anti-slip surface auxiliary molding protrusion and a rotating bracket auxiliary molding protrusion disposed in the upper molding cavity. The anti-slip surface auxiliary molding protrusion is disposed opposite to the anti-slip molding surface of the clothespin, and the rotating bracket auxiliary molding protrusion corresponds to the groove formed by the rotating bracket molding ring and the lower mold of the plastic clothespin.

[0012] In the aforementioned plastic clothespin mold, the groove forming part includes a groove forming protrusion disposed in the upper forming cavity.

[0013] In the aforementioned plastic clothespin mold, the mold closing and alignment component includes a mold closing and alignment side block disposed between the lower mold and the upper mold of the plastic clothespin forming. One end of the mold closing and alignment side block is engaged with the lower mold of the plastic clothespin forming, and the other end is engaged with the upper mold of the plastic clothespin forming.

[0014] In the above-mentioned plastic clothespin mold, the bottom of the upper mold for forming the plastic clothespin is provided with an upper flow channel, which is connected to the upper forming cavity.

[0015] In the aforementioned plastic clothespin mold, the lower mold for forming the plastic clothespin is provided with a lower flow channel, which is connected to the lower forming cavity.

[0016] Compared with existing technologies, the advantages of this utility model are:

[0017] 1. In the injection molding process, this utility model realizes the synchronous injection molding of the hole and groove structure of the clothes clip, the anti-slip clamping surface, and the connecting structure of the rotating area. Compared with traditional molds that require secondary processing, the production efficiency is greatly improved. At the same time, it avoids the dimensional errors and surface damage that may be introduced during secondary processing, ensures the dimensional accuracy and surface quality of each structure of the clothes clip, improves the product qualification rate and stability, and makes the clothes clip more reliable in use.

[0018] 2. This utility model reduces the equipment investment, labor costs, and material waste required for secondary processing. It eliminates the need to purchase secondary processing equipment such as drilling and milling machines, thus reducing equipment procurement and maintenance costs; simultaneously, it reduces manual operation steps, thereby lowering labor costs.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a partial structural schematic diagram of the present invention.

[0022] Figure 3 This is a partial structural schematic diagram of another aspect of this utility model.

[0023] Figure 4 This is a schematic diagram of the upper mold for forming plastic clothespins.

[0024] In the diagram: 1. Lower mold for plastic clothes clip forming; 2. Upper mold for plastic clothes clip forming; 3. Main injection molding board; 4. Mold closing and alignment part; 5. Lower molding cavity; 6. Upper molding cavity; 7. Clothes clip surface forming part; 8. Rotating area forming recess; 9. Auxiliary forming protrusion; 10. Embedded forming protrusion; 11. Groove forming part; 12. Positioning protrusion; 13. Clothes clip hole groove forming structure; 14. Core pulling fixing plate; 15. Clamp head hole groove forming rod; 16. Clamp body hole groove forming rod; 17. Clamp tail through hole forming rod; 18. Clothes clip anti-slip forming surface; 19. Rotating bracket forming ring; 20. Anti-slip surface auxiliary forming protrusion; 21. Rotating bracket auxiliary forming protrusion; 22. Groove forming protrusion; 23. Mold closing and alignment side block; 24. Upper part runner; 25. Lower part runner. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings.

[0026] like Figure 1-4 As shown, a plastic clothespin mold includes a lower plastic clothespin forming mold 1 and an upper plastic clothespin forming mold 2. An injection molding main board 3 is provided above the upper plastic clothespin forming mold 2. A mold closing and alignment component 4 is provided between the lower plastic clothespin forming mold 1 and the upper plastic clothespin forming mold 2. The lower plastic clothespin forming mold 1 has a lower forming cavity 5, and the upper plastic clothespin forming mold 2 has an upper forming cavity 6. The lower forming cavity 5 and the upper forming cavity 6 are directly opposite each other. The lower forming cavity 5 has a clothespin surface forming part 7, a rotating area forming recess 8, and an auxiliary forming protrusion 9. The upper forming cavity 6 has an embedded forming protrusion 10, a groove forming part 11, and a positioning protrusion 12. The clothespin surface forming part 7 and the rotating area forming recess 8 are respectively positioned corresponding to the embedded forming protrusion 10. A clothespin hole groove forming structure 13 that penetrates through the lower plastic clothespin forming mold 1 is provided below the lower plastic clothespin forming mold 1.

[0027] In this embodiment, a lower molding cavity 5 is formed in the lower mold 1 of the plastic clothespin forming mold, and an upper molding cavity 6 is formed in the upper mold 2 of the plastic clothespin forming mold. The lower molding cavity 5 and the upper molding cavity 6 are directly opposite each other, and together they constitute the molding cavity of the plastic clothespin. The lower molding cavity 5 is provided with a clothes-clamping surface forming part 7, a rotating area forming recess 8, and an auxiliary forming protrusion 9. The upper molding cavity 6 is provided with an embedded forming protrusion 10, a groove forming part 11, and a positioning protrusion 12. The clothes-clamping surface forming part 7 and the rotating area forming recess 8 are respectively positioned corresponding to the embedded forming protrusion 10. During injection molding, the plastic melt fills the cavity. The cavity, the clamping surface forming part 7, and the embedded forming protrusion 10 cooperate to directly form a clamping surface with anti-slip function; the rotating area forming recess 8 cooperates with the embedded forming protrusion 10 to form the connection structure of the clamping rotation area; the auxiliary forming protrusion 9 and the groove forming part 11 cooperate to assist in forming other external structures of the clamp; a clamping hole groove forming structure 13 is provided below the plastic clamping forming lower mold 1, which passes through the plastic clamping forming lower mold 1. The clamping hole groove forming structure 13 forms the clamping hole groove structure simultaneously during the injection molding process, without the need for subsequent secondary processing.

[0028] Combination Figure 1-4 As shown, the clothes clip hole groove forming structure 13 includes a core-pulling fixing plate 14 disposed below the plastic clothes clip forming lower mold 1. The core-pulling fixing plate 14 is provided with a clip head hole groove forming rod 15 and a clip body hole groove forming rod 16. The clip head hole groove forming rod 15 corresponds to the position of the clothes clip surface forming part 7, and the clip body hole groove forming rod 16 corresponds to the position of the auxiliary forming protrusion 9.

[0029] Specifically, during the injection molding process, the clamping head slot forming rod 15 cooperates with the clamping surface forming part 7. When the plastic melt fills the cavity, the clamping head slot forming rod 15 forms the slot structure of the clamping head part while forming the clamping surface. The clamping body slot forming rod 16 corresponds to the position of the auxiliary forming protrusion 9. Similarly, during injection molding, the clamping body slot forming rod 16 cooperates with the auxiliary forming protrusion 9 to form the slot structure of the clamping body part while forming the relevant structure of the clamping body.

[0030] The core-pulling fixing plate 14 is also provided with a clamping tail through hole forming rod 17. The clamping head hole groove forming rod 15, the clamping body hole groove forming rod 16 and the clamping tail through hole forming rod 17 are parallel to each other, and the clamping tail through hole forming rod 17 is arranged opposite to the positioning convex shaft 12.

[0031] In this embodiment, during mold closing and injection molding, the positioning cam 12 cooperates with the clip tail through hole forming rod 17. The positioning cam 12 not only plays a positioning role, but also works together with the clip tail through hole forming rod 17 to form the clip tail through hole while forming the clip tail structure. This ensures the integrity and accuracy of the overall structure of the clip, and enables the various hole and groove structures of the clip to be precisely formed without secondary processing, thereby improving product quality and production efficiency.

[0032] Combination Figure 2 , Figure 4 As shown, the garment clip forming part 7 includes a garment clip anti-slip forming surface 18 disposed in the forming lower cavity 5, and the garment clip anti-slip forming surface 18 is serrated.

[0033] In this embodiment, during the injection molding process, when the plastic melt fills the cavity formed by the lower molding cavity 5 and the upper molding cavity 6, the anti-slip molding surface 18 of the clothes clip cooperates with the anti-slip auxiliary molding protrusion 20 in the upper molding cavity 6 to directly form a serrated anti-slip structure on the clothes clip surface. This eliminates the need for subsequent secondary processing methods such as surface treatment to form the anti-slip surface, which not only simplifies the production process but also ensures the precision and consistency of the anti-slip structure, thereby improving the performance of the clothes clip.

[0034] The rotating area forming recess 8 includes a rotating support forming ring 19 disposed in the forming lower cavity 5, and the rotating support forming ring 19 corresponds to the position of the embedded forming protrusion 10.

[0035] In this embodiment, during injection molding, the rotating bracket forming ring 19 cooperates with the rotating bracket auxiliary forming protrusion 21 in the embedded forming protrusion 10 to accurately form the connection structure of the clothes clip rotating area, so that the rotating parts of the clothes clip can be installed and rotated smoothly, ensuring the normal use function of the clothes clip. At the same time, this one-time molding method avoids secondary assembly and other processing processes, improving production efficiency and product quality.

[0036] Combination Figure 2 , Figure 4 As shown, the embedded molding protrusion 10 includes an anti-slip surface auxiliary molding protrusion 20 and a rotating bracket auxiliary molding protrusion 21 disposed in the upper molding cavity 6. The anti-slip surface auxiliary molding protrusion 20 is disposed opposite to the anti-slip molding surface 18 of the clothes clip, and the rotating bracket auxiliary molding protrusion 21 corresponds to the groove formed by the rotating bracket molding ring 19 and the lower mold 1 of the plastic clothes clip.

[0037] In this embodiment, during the injection molding process, the anti-slip surface auxiliary molding protrusion 20 and the clothes clip anti-slip molding surface 18 are closely fitted together to jointly form the anti-slip clip surface of the clothes clip; the rotating bracket auxiliary molding protrusion 21 and the rotating bracket molding ring 19 are fitted together to form the connection structure of the clothes clip rotation area. This mutually cooperating structural design allows the key functional structure of the clothes clip to be formed in one injection molding process without secondary processing, which greatly improves production efficiency and ensures product quality.

[0038] The groove forming part 11 includes a groove forming protrusion 22 disposed in the upper forming cavity 6.

[0039] In this embodiment, during the injection molding process, the groove forming protrusion 22 cooperates with the relevant structure in the lower molding cavity 5. When the plastic melt fills the cavity, the required groove structure can be formed on the clothes clip to meet the design and usage requirements of the clothes clip, such as installing springs and other components. This structural design allows the groove structure of the clothes clip to be formed synchronously with other structures, simplifying the production process and improving production efficiency.

[0040] Combination Figure 1-4 As shown, the mold closing and alignment component 4 includes a mold closing and alignment side block 23 disposed between the lower mold 1 and the upper mold 2 of the plastic clothes clip forming. One end of the mold closing and alignment side block 23 is engaged with the lower mold 1 of the plastic clothes clip forming, and the other end is engaged with the upper mold 2 of the plastic clothes clip forming.

[0041] In this embodiment, during the mold closing process, the mold closing alignment side block 23 ensures accurate alignment of the lower mold 1 and the upper mold 2 for plastic clothespin forming by snap-fitting, so that the lower forming cavity 5 and the upper forming cavity 6 are precisely connected, thus ensuring the forming accuracy of each structure of the plastic clothespin.

[0042] Combination Figure 1-4 As shown, the bottom of the plastic clothespin forming upper mold 2 is provided with an upper flow channel 24, which is connected to the forming upper cavity 6.

[0043] In this embodiment, during the injection molding process, the plastic melt enters the upper flow channel 24 through the injection molding main board 3. The upper flow channel 24 evenly distributes the plastic melt into the upper molding cavity 6, ensuring that the plastic melt can fully fill the upper molding cavity 6, so that the upper part of the clothes clip structure can be completely and accurately molded.

[0044] Combination Figure 1-4 As shown, the lower mold 1 for forming plastic clothes clips is provided with a lower flow channel 25, which is connected to the lower forming cavity 5.

[0045] In this embodiment, during injection molding, the molten plastic is also evenly distributed into the lower molding cavity 5 through the lower flow channel 25, ensuring that the lower molding cavity 5 can be fully filled, so that the lower part of the clothes clip structure can be accurately molded. The setting of the upper flow channel 24 and the lower flow channel 25 ensures the uniform distribution of the molten plastic in the entire molding cavity, improving the molding quality and production efficiency of the clothes clip.

[0046] The working principle of this utility model is as follows:

[0047] First, the lower mold 1 and upper mold 2 of the plastic clothes clip are precisely closed using the mold closing alignment part 4 to ensure accurate alignment of the lower molding cavity 5 and the upper molding cavity 6, forming a complete plastic clothes clip molding cavity. Then, the mold is installed on the injection molding machine and connected to the injection molding equipment through the injection molding main board 3. The injection molding equipment injects molten plastic into the mold. The molten plastic first passes through the injection molding main board 3 and then flows into the upper runner 24 and the lower runner 25 respectively. The upper runner 24 evenly distributes the molten plastic into the upper molding cavity 6, and the lower runner 25 evenly distributes the molten plastic into the lower molding cavity 5, so that the entire molding cavity is fully filled. During the molding process, the anti-slip molding surface 18 in the clothes clip molding part 7 cooperates with the anti-slip auxiliary molding protrusion 20 in the embedded molding protrusion 10 to directly form a clothes clip surface with anti-slip function; the rotating bracket molding ring 19 and the rotating bracket molding ring 10 cooperate with the rotating bracket molding ring 10 to form a rotating bracket molding ring 20 in the embedded molding protrusion 10. The moving bracket assists in forming the protrusion 21 to form the connection structure of the clothespin rotation area; the auxiliary forming protrusion 9 cooperates with the groove forming part 11 and other structures to form other external structures of the clothespin. At the same time, the clothespin hole groove forming structure 13 below the plastic clothespin forming lower mold 1 plays a role. During the injection molding process, the clamp head hole groove forming rod 15, clamp body hole groove forming rod 16, and clamp tail through hole forming rod 17 on the core pulling fixing plate 14 cooperate with the relevant structures in the forming lower cavity 5 and forming upper cavity 6 respectively to simultaneously form the clamp head hole groove, clamp body hole groove, and clamp tail through hole and groove structure of the clothespin. After the plastic melt cools and solidifies, the mold is opened, and the formed plastic clothespin is taken out of the mold through the ejection mechanism, etc., to complete one production cycle. The whole process realizes the synchronous injection molding of the clothespin hole groove structure, anti-slip clamping surface and rotation area connection structure, without secondary processing, and efficiently and quickly produces plastic clothespins that meet the quality requirements.

[0048] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model.

[0049] Although this article frequently uses terms such as 1. lower mold for plastic clothespin forming, 2. upper mold for plastic clothespin forming, 3. injection molding main board, 4. mold closing alignment part, 5. lower forming cavity, 6. upper forming cavity, 7. clothespin surface forming part, 8. rotating area forming recess, 9. auxiliary forming protrusion, 10. embedded forming protrusion, 11. groove forming part, 12. positioning protrusion, 13. clothespin hole groove forming structure, 14. core pulling fixing plate, 15. clamping head hole groove forming rod, 16. clamping body hole groove forming rod, 17. clothespin through hole forming rod, 18. clothespin anti-slip forming surface, 19. rotating bracket forming ring, 20. anti-slip surface auxiliary forming protrusion, 21. rotating bracket auxiliary forming protrusion, 22. groove forming protrusion, 23. mold closing alignment side block, 24. upper part runner, 25. lower part runner, etc., the possibility of using other terms is not excluded. The use of these terms is merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. A plastic clothespin mold, comprising a lower mold (1) for forming plastic clothespins and an upper mold (2) for forming plastic clothespins, characterized in that, The upper mold (2) for forming plastic clothes clips is provided with an injection molding main board (3). The lower mold (1) for forming plastic clothes clips and the upper mold (2) for forming plastic clothes clips are provided with a mold closing and alignment part (4). The lower mold (1) for forming plastic clothes clips is provided with a lower molding cavity (5). The upper mold (2) for forming plastic clothes clips is provided with a higher molding cavity (6). The lower molding cavity (5) and the upper molding cavity (6) are directly opposite each other. The lower molding cavity (5) has a clothes clip surface forming part (7), a rotating area forming recess (8) and an auxiliary forming protrusion (9). The upper molding cavity (6) has an embedded forming protrusion (10), a groove forming part (11) and a positioning protrusion (12). The clothes clip surface forming part (7) and the rotating area forming recess (8) are respectively positioned opposite to the embedded forming protrusion (10). The lower mold (1) for forming plastic clothes clips is provided with a clothes clip hole groove forming structure (13) that passes through the lower mold (1) for forming plastic clothes clips.

2. The plastic clothespin mold according to claim 1, characterized in that, The garment clip slot forming structure (13) includes a core-pulling fixing plate (14) disposed below the plastic garment clip forming lower mold (1). The core-pulling fixing plate (14) is provided with a clip head slot forming rod (15) and a clip body slot forming rod (16). The clip head slot forming rod (15) corresponds to the position of the garment clip surface forming part (7), and the clip body slot forming rod (16) corresponds to the position of the auxiliary forming protrusion (9).

3. The plastic clothespin mold according to claim 2, characterized in that, The core-pulling fixing plate (14) is also provided with a clamping tail through hole forming rod (17). The clamping head hole groove forming rod (15), the clamping body hole groove forming rod (16) and the clamping tail through hole forming rod (17) are parallel to each other. The clamping tail through hole forming rod (17) is set opposite to the positioning convex shaft (12).

4. The plastic clothespin mold according to claim 1, characterized in that, The garment clip forming part (7) includes a garment clip anti-slip forming surface (18) disposed in the forming lower cavity (5), and the garment clip anti-slip forming surface (18) is serrated.

5. The plastic clothespin mold according to claim 4, characterized in that, The rotating area forming recess (8) includes a rotating bracket forming ring (19) disposed in the forming lower cavity (5), and the rotating bracket forming ring (19) corresponds to the position of the embedded forming protrusion (10).

6. The plastic clothespin mold according to claim 5, characterized in that, The embedded molding protrusion (10) includes an anti-slip surface auxiliary molding protrusion (20) and a rotating bracket auxiliary molding protrusion (21) disposed in the upper molding cavity (6). The anti-slip surface auxiliary molding protrusion (20) is disposed opposite to the anti-slip molding surface (18) of the clothes clip. The rotating bracket auxiliary molding protrusion (21) and the rotating bracket molding ring (19) correspond to the groove formed by the plastic clothes clip molding lower mold (1).

7. The plastic clothespin mold according to claim 1, characterized in that, The groove forming part (11) includes a groove forming protrusion (22) disposed in the upper forming cavity (6).

8. The plastic clothespin mold according to claim 1, characterized in that, The mold alignment component (4) includes a mold alignment side block (23) disposed between the lower mold (1) and the upper mold (2) of the plastic clothespin forming. One end of the mold alignment side block (23) is engaged with the lower mold (1) of the plastic clothespin forming, and the other end is engaged with the upper mold (2) of the plastic clothespin forming.

9. The plastic clothespin mold according to claim 1, characterized in that, The plastic clothes clip forming upper mold (2) has an upper flow channel (24) at the bottom, and the upper flow channel (24) is connected to the forming upper cavity (6).

10. The plastic clothespin mold according to claim 1, characterized in that, The lower mold (1) for forming plastic clothes clips is provided with a lower flow channel (25), which is connected to the lower forming cavity (5).

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