A plastic handle surface no flash injection molding mold

Abstract

The application relates to a plastic handle surface non-ejection pin injection molding mold, which comprises a movable mold, a fixed mold, a driving part one, a driving part two, a moving seat and a core-pulling block, the moving seat is located between the fixed mold and the movable mold, the driving part one drives the moving seat to move along the mold opening and closing direction, the core-pulling block is slidably connected on the moving seat in the core-pulling direction, and the driving part two drives the core-pulling block to move. After the mold is opened, the driving part one first drives the moving seat to move towards the fixed mold side, the core-pulling block can drive the handle to separate from the movable mold, then the driving part two drives the core-pulling block to complete core-pulling, the handle is limited by the moving seat and cannot move along with the core-pulling block, so that the core-pulling is completed; the opening and closing sequence is changed to prevent the handle outer surface from being depressed and deformed due to improper ejection pin pressure, and the handle appearance and holding feeling are guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a mold for injection molding plastic handles without top marks. Background Technology

[0002] A mold is a tool used to create shaped objects. It mainly achieves the shaping of objects by changing the physical state of the material being molded.

[0003] like Figure 1 The plastic part shown is handle 1. The outer surface of handle 1 is directly exposed, so using the traditional method of pulling the core and then ejecting it with an ejector pin will damage the outer surface. When the ejector pin is ejected, it will leave obvious ejector pin marks on the exposed outer surface. These marks cannot be removed by simple processing, directly affecting the appearance of the handle and reducing the overall quality of the product. If the ejector pin pressure is not properly controlled, it may also cause problems such as dents and deformation on the outer surface, which not only damages the appearance but also affects the grip of the handle and reduces the user experience. Utility Model Content

[0004] To facilitate better demolding of the handle, this application provides a plastic handle surface injection molding mold without top marks.

[0005] The technical solution for a plastic handle surface-mark-free injection molding mold provided in this application is as follows: A plastic handle surface without top mark injection molding mold includes a moving mold, a fixed mold, a first driving component, a second driving component, a movable seat, and a core-pulling block. The movable seat is located between the fixed mold and the moving mold. The first driving component drives the movable seat to move along the mold opening and closing direction. The core-pulling block is slidably connected to the movable seat along the core-pulling direction. The second driving component drives the core-pulling block to move.

[0006] By adopting the above technical solution, after mold opening, the first drive component first drives the moving seat to move towards the fixed mold side, and the core-pulling block can drive the handle to detach from the moving mold. Then, the second drive component drives the core-pulling block to complete the core pulling. The handle is limited by the moving seat and cannot move with the core-pulling block, thus completing the core pulling. Changing the order of mold opening and core pulling can prevent the outer surface of the handle from being dented or deformed due to improper ejector pin pressure, thus ensuring the aesthetic appearance and grip feel of the handle.

[0007] Preferably, the driving component includes a first hydraulic cylinder, a top plate, and a plurality of ejector pins. The top plate is located on the side of the moving mold away from the fixed mold. The ejector pins slide on the moving mold along the mold opening and closing direction. The two ends of the ejector pins are respectively fixedly connected to the top plate and the movable seat. The first hydraulic cylinder drives the top plate to move.

[0008] By adopting the above technical solution, when the first hydraulic cylinder drives the top plate to move, the top plate drives the ejector pin to smoothly push the moving seat along the mold opening and closing direction, and the ejector pin indirectly acts on the moving seat rather than the handle surface, thus avoiding damage to the outer surface of the handle.

[0009] Preferably, the second driving component includes a second hydraulic cylinder and a mounting block. The mounting block is located on the side of the movable seat away from the handle. The piston rod of the second hydraulic cylinder is fixedly mounted on the movable seat, and the cylinder body of the second hydraulic cylinder is fixed on the mounting block. The end of the core-pulling block away from the handle is detachably connected to the mounting block.

[0010] By adopting the above technical solution, the core-pulling block can be precisely driven and conveniently installed: the second hydraulic cylinder can stably drive the core-pulling block to move along the core-pulling direction by fixing the cylinder body to the mounting block and connecting the piston rod to the moving seat, ensuring that the core-pulling action is accurate and in place, and guaranteeing the quality of the handle molding; at the same time, the detachable connection between the core-pulling block and the mounting block facilitates the maintenance and replacement of the core-pulling block in the later stage, reducing the mold maintenance cost.

[0011] Preferably, the mounting block also includes an intermediate block and a locking pin. The mounting block includes a first plate and a second plate, which are fixedly connected by screws. The second hydraulic cylinder is located on the side of the mounting block away from the movable seat and is fixed on the second plate. The side of the first plate facing the second plate has a receiving groove that matches the intermediate block. The intermediate block has a mating groove that matches the end of the core-pulling block away from the handle. The intermediate block and the core-pulling block each have slots. The locking pin passes through the two slots perpendicular to the core-pulling direction.

[0012] By adopting the above technical solution, the connection structure and ease of disassembly and assembly of the core-pulling block are optimized: the receiving groove provides a stable installation space for the intermediate block, the cooperation between the slot and the locking pin enables the quick fixing of the core-pulling block and the intermediate block, and the locking pin is set perpendicular to the core-pulling direction, which can effectively prevent the core-pulling block from loosening or shifting during the core-pulling process; when the core-pulling block needs to be replaced, it can be disassembled simply by pulling out the locking pin, which greatly simplifies the disassembly and assembly process and improves the mold maintenance efficiency.

[0013] Preferably, a plurality of first guide rods are fixed on the moving mold, and a plurality of first through holes are opened through the moving seat. The plurality of first guide rods are respectively inserted and slide in the plurality of first through holes along the opening and closing direction of the mold.

[0014] By adopting the above technical solution, guidance and limiting are provided for the movement of the movable seat, and the forming accuracy of the handle is improved.

[0015] Preferably, two second guide rods are fixed on the movable base, and two second through holes are opened on the mounting block. The two second guide rods pass through the two second through holes respectively and slide in the two second through holes along the core-pulling direction.

[0016] By adopting the above technical solution, the accuracy of the core-pulling direction of the core-pulling block is ensured, the core-pulling block is prevented from deviating from the preset direction during the core-pulling process, and the scraping of the inner wall of the handle or the impact on the handle molding structure due to core-pulling deviation are avoided, thus ensuring that the core-pulling action is smooth and accurate.

[0017] Preferably, the two second guide rods are located on both sides of the second hydraulic cylinder.

[0018] By adopting the above technical solution, the balance of the core-pulling drive is further improved: the second guide rods are symmetrically distributed on both sides of the second hydraulic cylinder, so that when the second hydraulic cylinder drives the mounting block to move, the two ends of the mounting block can be subjected to uniform guiding force, avoiding the mounting block from tilting due to uneven force, thereby ensuring that the core-pulling block moves at a constant speed along the core-pulling direction, reducing vibration and deviation during the core-pulling process, and improving the overall stability of the mold operation.

[0019] The main technical effects of this utility model are reflected in the following aspects: 1. After the mold is opened, the first driving component drives the moving seat to move towards the fixed mold side. The core-pulling block can drive the handle to detach from the moving mold. Then the second driving component drives the core-pulling block to complete the core pulling. The handle is limited by the moving seat and cannot move with the core-pulling block, thus completing the core pulling. Changing the order of mold opening and core pulling can prevent the outer surface of the handle from being dented or deformed due to improper ejector pin pressure, thus ensuring the aesthetic appearance and grip feel of the handle. 2. When the first hydraulic cylinder of this utility model drives the top plate to move, the top plate drives the ejector pin to smoothly push the moving seat along the mold opening and closing direction, and the ejector pin indirectly acts on the moving seat rather than the handle surface, so as to avoid damage to the outer surface of the handle. Attached Figure Description

[0020] Figure 1 This is a structural diagram of the handle of this application.

[0021] Figure 2 This is a schematic diagram of the overall structure of an embodiment of this application.

[0022] Figure 3 This is a schematic diagram of the structure of a driver component according to an embodiment of this application.

[0023] Figure 4 This is a schematic diagram of the demolding structure of the handle in an embodiment of this application. Figure 5 This is a cross-sectional view of the mold in the embodiment of this application.

[0024] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0025] Explanation of reference numerals in the attached drawings: 1. Handle; 21. Moving mold; 211. First guide rod; 22. Fixed mold; 3. Moving seat; 31. First through hole; 32. Second guide rod; 4. Core-pulling block; 5. Drive component one; 51. Top plate; 52. Ejector pin; 6. Drive component two; 61. Second hydraulic cylinder; 62. Mounting block; 621. First plate; 622. Second plate; 623. Receiving groove; 624. Second through hole; 63. Intermediate block; 631. Connecting groove; 64. Locking pin; 65. Slot. Detailed Implementation

[0026] The following is in conjunction with the appendix Figures 1-6 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0027] This application discloses an injection mold for making plastic handles without top marks.

[0028] Reference Figures 1-4 This embodiment of a plastic handle surface without top mark injection molding mold includes a moving mold 21, a fixed mold 22, a first driving component 5, a second driving component 6, a movable seat 3 and a core-pulling block 4. The movable seat 3 is located between the fixed mold 22 and the moving mold 21. The first driving component 5 drives the movable seat 3 to move along the mold opening and closing direction. The core-pulling block 4 is slidably connected to the movable seat 3 along the core-pulling direction. The second driving component 6 drives the core-pulling block 4 to move.

[0029] Reference Figures 1-4 After the mold is opened, the first drive component 5 first drives the moving seat 3 to move towards the fixed mold 22. The core-pulling block 4 can drive the handle 1 to disengage from the moving mold 21. Then the second drive component 6 drives the core-pulling block 4 to complete the core pulling. The handle 1 is limited by the moving seat 3 and cannot move with the core-pulling block 4, thus completing the core pulling. Changing the order of mold opening and core pulling can prevent the outer surface of the handle 1 from being dented or deformed due to improper pressure of the ejector pin 52, thus ensuring the appearance and grip feel of the handle 1.

[0030] Reference Figures 1-4 The driving component 5 includes a first hydraulic cylinder, a top plate 51 and several ejector pins 52. The top plate 51 is located on the side of the moving mold 21 away from the fixed mold 22. The ejector pins 52 slide on the moving mold 21 in the mold opening and closing direction. The two ends of the ejector pins 52 are fixedly connected to the top plate 51 and the moving seat 3, respectively. The cylinder body of the first hydraulic cylinder is usually indirectly fixedly connected to the moving mold 21. The first hydraulic cylinder drives the top plate 51 to move.

[0031] Reference Figures 1-4 When the first hydraulic cylinder drives the top plate 51 to move, the top plate 51 drives the ejector pin 52 to smoothly push the moving seat 3 along the mold opening and closing direction, and the ejector pin 52 indirectly acts on the moving seat 3 rather than the surface of the handle 1, so as to avoid damage to the outer surface of the handle 1.

[0032] Reference Figure 3 andFigure 4 The second driving component 6 includes a second hydraulic cylinder 61 and a mounting block 62. The mounting block 62 is located on the side of the movable seat 3 away from the handle 1. The piston rod of the second hydraulic cylinder 61 is fixed on the movable seat 3 by screws. The cylinder body of the second hydraulic cylinder 61 is fixed on the mounting block 62 by screws. The end of the core-pulling block 4 away from the handle 1 is detachably connected to the mounting block 62.

[0033] Reference Figure 3 and Figure 4 The second hydraulic cylinder 61, through the fixation of the cylinder body and the mounting block 62 and the connection of the piston rod and the moving seat 3, can stably drive the core-pulling block 4 to move along the core-pulling direction, ensuring that the core-pulling action is accurate and in place, and guaranteeing the molding quality of the handle 1; at the same time, the detachable connection between the core-pulling block 4 and the mounting block 62 facilitates the maintenance and replacement of the core-pulling block 4 in the later stage, reducing the mold maintenance cost.

[0034] Reference Figures 4-6 It also includes an intermediate block 63 and a locking pin 64. The mounting block 62 includes a first plate 621 and a second plate 622. The first plate 621 and the second plate 622 are fixedly connected by screws. The second hydraulic cylinder 61 is located on the side of the mounting block 62 away from the movable seat 3 and is fixed on the second plate 622. The side of the first plate 621 facing the second plate 622 has a receiving groove 623 that matches the intermediate block 63. The intermediate block 63 has a mating groove 631 that matches the end of the core-pulling block 4 away from the handle 1. The intermediate block 63 and the core-pulling block 4 each have a slot 65. The locking pin 64 passes through the two slots 65 in a direction perpendicular to the core-pulling direction.

[0035] Reference Figures 4-6 The connection structure and ease of disassembly and assembly of the core-pulling block 4 are optimized: the receiving groove 623 provides a stable installation space for the intermediate block 63, and the cooperation between the slot 65 and the locking pin 64 enables the quick fixing of the core-pulling block 4 and the intermediate block 63. The locking pin 64 is set perpendicular to the core-pulling direction, which can effectively prevent the core-pulling block 4 from loosening or shifting during the core-pulling process. When the core-pulling block 4 needs to be replaced, it can be disassembled simply by pulling out the locking pin 64, which greatly simplifies the disassembly and assembly process and improves the mold maintenance efficiency.

[0036] Reference Figure 3 and Figure 4 A number of first guide rods 211 are fixed on the moving mold 21, and a number of first through holes 31 are opened through the moving seat 3. The first guide rods 211 are respectively inserted and slide in the first through holes 31 along the opening and closing direction of the mold. This provides guidance and limitation for the movement of the moving seat 3 and improves the forming accuracy of the handle 1.

[0037] Reference Figure 3 and Figure 4Two second guide rods 32 are fixed on the movable base 3. Two second through holes 624 are opened on the mounting block 62. The two second guide rods 32 pass through the two second through holes 624 respectively and slide in the two second through holes 624 along the core pulling direction. The second through holes 624 pass through the first plate 621 and the second plate 622 respectively, ensuring the accuracy of the core pulling direction of the core pulling block 4, preventing the core pulling block 4 from deviating from the preset direction during the core pulling process, avoiding scraping the inner wall of the handle 1 or affecting the forming structure of the handle 1 due to core pulling deviation, and ensuring that the core pulling action is smooth and accurate.

[0038] Reference Figure 3 and Figure 4 Two second guide rods 32 are located on both sides of the second hydraulic cylinder 61. This further improves the balance of the core-pulling drive: the second guide rods 32 are symmetrically distributed on both sides of the second hydraulic cylinder 61, ensuring that when the second hydraulic cylinder 61 drives the mounting block 62 to move, both ends of the mounting block 62 receive a uniform guiding force. This prevents the mounting block 62 from tilting due to uneven force, thus ensuring that the core-pulling block 4 moves at a uniform speed along the core-pulling direction, reducing vibration and deviation during the core-pulling process, and improving the overall stability of the mold operation.

[0039] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A plastic handle surface injection molding mold without top marks, characterized in that: It includes a moving mold (21), a fixed mold (22), a first driving component (5), a second driving component (6), a moving base (3), and a core-pulling block (4). The moving base (3) is located between the fixed mold (22) and the moving mold (21). The first driving component (5) drives the moving base (3) to move along the mold opening and closing direction. The core-pulling block (4) is slidably connected to the moving base (3) along the core-pulling direction. The second driving component (6) drives the core-pulling block (4) to move.

2. The injection mold for a plastic handle surface without top marks according to claim 1, characterized in that: The driving component (5) includes a first hydraulic cylinder, a top plate (51) and a plurality of ejector pins (52). The top plate (51) is located on the side of the moving mold (21) away from the fixed mold (22). The ejector pins (52) slide on the moving mold (21) along the mold opening and closing direction. The two ends of the ejector pins (52) are respectively fixedly connected to the top plate (51) and the moving seat (3). The first hydraulic cylinder drives the top plate (51) to move.

3. The injection mold for a plastic handle surface without top marks according to claim 1, characterized in that: The second driving component (6) includes a second hydraulic cylinder (61) and a mounting block (62). The mounting block (62) is located on the side of the movable seat (3) away from the handle (1). The piston rod of the second hydraulic cylinder (61) is fixedly mounted on the movable seat (3). The cylinder body of the second hydraulic cylinder (61) is fixed on the mounting block (62). The end of the core-pulling block (4) away from the handle (1) is detachably connected to the mounting block (62).

4. The injection mold for a plastic handle surface without top marks according to claim 3, characterized in that: It also includes an intermediate block (63) and a locking pin (64). The mounting block (62) includes a first plate (621) and a second plate (622). The first plate (621) and the second plate (622) are fixedly connected by screws. The second hydraulic cylinder (61) is located on the side of the mounting block (62) away from the moving seat (3) and is fixed on the second plate (622). The side of the first plate (621) facing the second plate (622) has a receiving groove (623) that matches the intermediate block (63). The intermediate block (63) has a mating groove (631) that matches the end of the core-pulling block (4) away from the handle (1). The intermediate block (63) and the core-pulling block (4) have slots (65) respectively. The locking pin (64) passes through the two slots (65) in a direction perpendicular to the core-pulling direction.

5. The injection mold for a plastic handle surface without top marks according to claim 1, characterized in that: The moving mold (21) is fixed with a number of first guide rods (211), and the moving seat (3) is provided with a number of first through holes (31). The number of first guide rods (211) are respectively inserted and slide in the number of first through holes (31) along the opening and closing direction.

6. The injection mold for a plastic handle surface without top marks according to claim 3, characterized in that: Two second guide rods (32) are fixed on the movable seat (3), and two second through holes (624) are opened on the mounting block (62). The two second guide rods (32) pass through the two second through holes (624) respectively and slide in the two second through holes (624) along the core pulling direction.

7. The injection mold for a plastic handle surface without top marks according to claim 6, characterized in that: Two second guide rods (32) are located on both sides of the second hydraulic cylinder (61).

Images