Injection mold of fixed mold push-out inclined guide pillar four-opening sliding block and forming method
By introducing a fixed mold to the injection mold, the four-open slider and pull sleeve linkage structure of the inclined guide column is solved, and the problem of limited pushing action of traditional molds is achieved, a longer core pulling distance and a more efficient forming process are improved. The safety of the mold and the quality of the finished product.
Patent Information
- Application Number
- CN202411208182.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-30
- Publication Date
- 2024-12-17
AI Technical Summary
During the molding process of traditional injection molds, due to the limited pushing action, it is difficult to remove the parts smoothly, and it is difficult to adjust the mold opening stroke. Especially when the outer surface of the part has a side convex structure, the core pulling distance is insufficient, and the template thickness needs to be increased or Extending the slide leads to complex processing.
The injection mold with four-open slides of inclined guide column is adopted to push out the injection mold with four-open slides. By setting up a structure of pulling sleeve and pulling rod linkage in the mold fixing part of the mold, the mold opening stroke is increased, and the oblique pulling is achieved using the oblique guide column and four-open slide mechanism. The core, combined with the design of the gate sleeve and sealing strip, enables the introduction of the parts from the fixed mold direction.
It greatly increases the mold opening stroke of the mold, reduces the difficulty of picking up parts, improves the safety and molding efficiency of the mold, simplifies the processing process, ensures the beautiful appearance and qualified size of the parts, and reduces the flow pressure and heat loss.
Smart Images
Figure CN119141787A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of injection molds, in particular to an injection mold with a fixed mold pushing out an inclined guide column and a four-opening slide block and a molding method. Background Art
[0002] At present, most plastic injection molding molds adopt the method of feeding from the fixed mold cavity on the outer surface of the molded part, and using the ejector of the injection machine to drive the ejection mechanism in the mold to eject the part in the moving mold direction. Due to special use requirements, some products need to be molded by feeding from the inner surface of the part and ejecting the part from the fixed mold direction. At this time, the ejection action of the mold is no longer driven by the ejection part of the injection machine, but is completed by the anti-ejection structure set in the fixed mold part of the mold. When the outer surface of the part has a convex and concave structure on the side in all directions, a four-open slider mechanism is usually used for molding. Injection molds with four-open slider mechanisms mostly use structures such as inclined guide column core pulling or inclined slider core pulling to achieve lateral parting core pulling action of the mold. The characteristic of the inclined guide column core pulling mechanism is a large pulling distance, but the slider only moves horizontally during core pulling, and it must be pushed out after the core pulling action is completed, and the position of the push rod must avoid the slider to avoid interference. The characteristic of the inclined slider mechanism is that it has a large pulling force and is suitable for core pulling of a larger area. When pulling the core, under the push of the push rod, the inclined slider moves obliquely along the guide slide device, pushing and pulling at the same time, but the pulling distance is small. Ordinary inclined slider mechanisms mostly use guide slides with circular or rectangular cross-sections. The slide is set inside the template adjacent to the inclined slider. In order to prevent the inclined slider from tilting after being pushed out, its push-out stroke generally does not exceed two-thirds of the length of the template slide. If the push-out distance is not enough, it is necessary to increase the template thickness, extend the slide, etc.
[0003] Normally, the mold pushed out from the movable mold direction is fixed on the movable mold plate of the injection molding machine and the fixed mold plate fixed on the fixed mold plate of the injection molding machine is fully opened when the mold is opened. At this time, the distance between the parting surfaces of the movable and fixed mold plates is the same as the mold opening stroke of the injection molding machine, while the mold pushed out from the fixed mold must adjust the mold opening stroke of the injection molding machine within the fixed stroke, such as Figure 4 As shown in the figure, due to the limitation of the pull rod length and the thickness of the movable template, this stroke not only makes it difficult to smoothly remove the workpiece, but also the adjustment of the injection molding machine is also very laborious; the traditional inclined slider core pulling mechanism needs to set up and process guide slides and guide grooves, and the core pulling distance is longer; improvement is needed, therefore, we propose an injection mold and molding method for a fixed mold to push out an inclined guide column and a four-open slider. Summary of the invention
[0004] The purpose of the present invention is to provide an injection mold and a molding method for a fixed mold to push out an inclined guide pin and a four-open slide block, thereby solving the problems raised in the background technology.
[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: an injection mold and a molding method for a fixed mold to push out a four-open slider with an inclined guide pin, comprising a fixed mold plate and a movable mold base plate, a core is fixedly arranged at the center of the surface of the fixed mold plate, a cavity is fixedly arranged on the end surface of the movable mold base plate facing the core through a screw A, and a four-open slider is arranged around the outside of the core, the four-open slider includes four sliders of the same size, and the four-open slider is slidably arranged around the outside of the core through an inclined guide pin; A pull sleeve is slidably provided on the surface of the movable mold base plate, a pull rod is slidably provided inside the pull sleeve, the pull rod is slidably provided, the pull rod is slidably connected with the fixed mold plate, one end of the pull rod is fixedly connected with the push rod fixing plate by screw B, and the push rod fixing plate is respectively connected with the four slide blocks of the four-open slide block through four slide block push rods; The end of the fixed mold plate away from the movable mold base plate is connected with the support, the cushion block, and the fixed mold base plate in sequence through screws C. The fixed mold base plate is fixedly installed with a positioning ring through screws D. A sprue sleeve is provided through the middle of the core. One end of the sprue sleeve is connected with the inside of the core, and the other end of the sprue sleeve is fixed to the support surface through screws E. A guide column is fixedly arranged on the surface of the movable die seat plate, a concave hole is opened on the surface of the fixed die plate, and a guide sleeve for accommodating the insertion of the guide column is fixedly arranged inside the concave hole; The molding method of the injection mold of the fixed mold pushing out the inclined guide pin and the four-opening slide block comprises the following steps: S1: In the initial state, the push rod pulls the push rod fixing plate to be close to the fixed mold base plate, and the four-open sliders are distributed around the outside of the core to control the movable mold base plate to fit and contact with the fixed mold plate. At this time, the cavity, core, and four-open sliders form an injection cavity; S2: The molten raw material is injected into the injection cavity through the sprue sleeve by the injection equipment and left to stand for 5-10 seconds; S3: Control the separation of the movable mold base plate and the fixed mold plate. During the separation process of the movable mold base plate and the fixed mold plate, the guide column always slides inside the guide sleeve. As the distance between the movable mold base plate and the fixed mold plate increases, the pull sleeve extends out of the through slot of the movable mold base plate, and the inner ring inside the through slot presses against the pull sleeve's abutment ring, so that the pull sleeve does not separate from the through slot. As the distance between the movable mold base plate and the fixed mold plate continues to increase, the pull sleeve cooperates with the pull rod to pull the push rod fixing plate toward the supporting direction. At this time, the push rod fixing plate links the four slider push rods to move, and the four slider push rods push the four sliders of the four-open slider to move obliquely along the direction of the oblique guide column respectively, until the injected workpiece is separated from the core surface, and demolding is completed; S4: The push rod pulls the push rod fixing plate to move toward the fixed mold base plate until it is in contact with the fixed mold base plate. The push rod fixing plate links the four slider push rods to move. The four slider push rods pull the four sliders of the four-open slider to move obliquely along the direction of the oblique guide column, so that the four-open slider is distributed around the outside of the core to complete the reset.
[0006] Furthermore, the gate sleeve passes through the support and the fixed mold plate in sequence, and a sealing strip is provided on the outside of the gate sleeve, and the sealing strip is arranged on the contact end surface of the support and the fixed mold plate.
[0007] Furthermore, a retaining ring is fixedly provided on one end of the inclined guide column away from the four-open slide block by means of a screw F.
[0008] Furthermore, a through groove for accommodating the insertion of the pull sleeve is provided inside the movable mold base plate, a retaining ring is provided at one end of the pull sleeve embedded in the through groove inside the movable mold base plate, an inner ring for resisting the retaining ring is provided at the end of the through groove facing the fixed mold plate, a retaining ring is provided at one end of the pull rod embedded in the pull sleeve, a convex ring for resisting the retaining ring is provided at the end of the pull sleeve facing away from the retaining ring, and a retreat groove for accommodating the insertion of the pull sleeve is provided on the surface of the fixed mold plate.
[0009] Furthermore, a push rod for resetting the push rod fixing plate is connected to the middle of the push rod fixing plate.
[0010] Compared with the prior art, the present invention has the following beneficial effects: The technical solution of the present application increases the mold opening stroke significantly by adding a pull sleeve structure on the basis of the traditional pull rod structure and using the pull sleeve and the pull rod to link and set the distance, which is beneficial to improving the mold safety and reducing the difficulty of removing parts. The inclined guide column and four-open slider core pulling mechanism combines the characteristics of the inclined guide column core pulling mechanism with a large pulling distance and the inclined slider core pulling mechanism with a large pulling force. The processing is simple and the assembly is convenient. The inclined guide column and four-open slider structure are formed by feeding from the inside of the fixed mold plate and pushing the fixed mold with the pull sleeve and the pull rod to form the parts. After the mold is assembled, the operation is smooth and reliable during the mold trial process, and the formed parts have beautiful appearance, no burrs, and qualified dimensions. BRIEF DESCRIPTION OF THE DRAWINGS
[0011] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings: Figure 1 It is a cross-sectional view of an injection mold of the present invention, in which a fixed mold pushes out an inclined guide pin and a four-open slide block; Figure 2 It is a structural schematic diagram of the injection workpiece of the present invention; Figure 3 It is a schematic diagram of the state of the pull sleeve and the pull rod when the fixed mold plate and the movable mold base plate are separated from each other in the present invention; Figure 4 It is a schematic diagram of a traditional tie rod structure; Figure 5 Schematic diagram of the angle of the inclined guide column.
[0012] In the figure: 1. movable mold base plate; 2. four-open slider; 3. pull sleeve; 4. pull rod; 5. fixed mold plate; 6. slider push rod; 8. support; 9. screw B; 10. push rod fixing plate; 11. fixed mold base plate; 12. support; 13. positioning ring; 14. screw D; 15. push rod; 16. screw E; 17. sealing strip; 18. core; 19. gate sleeve; 20. screw C; 21. spacer; 22. guide sleeve; 23. guide column; 24. cavity; 25. screw A; 26. inclined guide column; 27. retaining ring; 28. screw F. DETAILED DESCRIPTION
[0013] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.
[0014] Embodiment 1, as Figure 1-5 As shown, the present invention provides a technical solution: an injection mold with a fixed mold pushing out an inclined guide pin and a four-open slider, comprising a fixed mold plate 5 and a movable mold base plate 1, a core 18 is fixedly arranged at the center position of the surface of the fixed mold plate 5, a cavity 24 is fixedly arranged on the end surface of the movable mold base plate 1 facing the core 18 through a screw A25, and a four-open slider 2 is arranged around the outside of the core 18, the four-open slider 2 includes four sliders of the same size, and the four-open slider 2 is slidably arranged around the outside of the core 18 through an inclined guide pin 26; A pull sleeve 3 is slidably provided on the surface of the movable mold base plate 1, a pull rod 4 is slidably provided inside the pull sleeve 3, the pull rod 4 is slidably provided through the fixed mold plate 5, one end of the pull rod 4 is fixedly connected to the push rod fixing plate 10 through a screw B9, and the push rod fixing plate 10 is respectively connected to the four sliders of the four-open slider 2 through four slider push rods 6; The end of the fixed mold plate 5 that is away from the movable mold base plate 1 is connected to the support 8, the cushion block 21, and the fixed mold base plate 11 in sequence through the screw C20. The fixed mold base plate 11 is fixedly installed with a positioning ring 13 on the outside through the screw D14. A sprue sleeve 19 is provided through the middle of the core 18. One end of the sprue sleeve 19 is connected to the inside of the core 18, and the other end of the sprue sleeve 19 is fixed to the surface of the support 8 through the screw E16. A guide post 23 is fixedly arranged on the surface of the movable mold base plate 1, and a concave hole is opened on the surface of the fixed mold plate 5, and a guide sleeve 22 for accommodating the guide post 23 is fixedly arranged inside the concave hole; A support column 12 is provided in the middle of the cushion block 21, and the two ends of the support column 12 are respectively connected to the fixed mold base plate 11 and the support 8. The cushion block 21 is provided with a chamber for accommodating the lateral movement of the push rod fixing plate 10, so that the push rod fixing plate 10 can move in the preset chamber of the cushion block 21. The molding method of the injection mold of the fixed mold pushing out the inclined guide pin and the four-opening slide block comprises the following steps: S1: Initial state, the push rod 15 pulls the push rod fixing plate 10 to be close to the fixed mold base plate 11, and the four-open slider 2 is distributed around the outside of the core 18, controlling the movable mold base plate 1 to be in contact with the fixed mold plate 5. At this time, the cavity 24, the core 18, and the four-open slider 2 form an injection cavity; S2: The molten raw material is injected into the injection cavity through the sprue sleeve 19 by the injection device and left to stand for 5 to 10 seconds; S3: Control the movable mold base plate 1 to separate from the fixed mold plate 5. During the separation process of the movable mold base plate 1 and the fixed mold plate 5, the guide column 23 is always located inside the guide sleeve 22 and slides. As the distance between the movable mold base plate 1 and the fixed mold plate 5 increases, the pull sleeve 3 extends out of the through groove of the movable mold base plate 1, and the inner ring inside the through groove abuts against the abutment ring of the pull sleeve 3, so that the pull sleeve 3 does not separate from the through groove. As the distance between the movable mold base plate 1 and the fixed mold plate 5 continues to increase, the pull sleeve 3 cooperates with the pull rod 4 to pull the push rod fixing plate 10 toward the support 8. At this time, the push rod fixing plate 10 links the four slider push rods 6 to move, and the four slider push rods 6 push the four sliders of the four-open slider 2 to move obliquely along the direction of the oblique guide column 26 respectively, until the injected workpiece is separated from the surface of the core 18, and the demolding is completed; S4: The push rod 15 pulls the push rod fixing plate 10 to move toward the fixed mold base plate 11 until it is in contact with the fixed mold base plate 11, and the push rod fixing plate 10 links the four slider push rods 6 to move, and the four slider push rods 6 pull the four sliders of the four-open slider 2 to move obliquely along the direction of the oblique guide column 26, so that the four-open slider 2 is distributed around the outside of the core 18 to complete the reset.
[0015] In the preferred technical solution, the sprue sleeve 19 passes through the support 8 and the fixed mold plate 5 in sequence, and a sealing strip 17 is provided on the outside of the sprue sleeve 19. The sealing strip 17 is arranged on the contact end surface of the support 8 and the fixed mold plate 5, and the sealing strip 17 is used to enhance the sealing of the channel passing through the sprue sleeve 19 and the fixed mold plate 5.
[0016] In the preferred technical solution, a retaining ring 27 is fixedly provided at one end of the inclined guide column 26 away from the four-open slider 2 by a screw F28, and the retaining ring 27 is used to prevent the four-open slider 2 from directly detaching from the inclined guide column 26.
[0017] In the preferred technical solution, a through groove for accommodating the insertion of the pull sleeve 3 is provided inside the movable mold base plate 1, and a retaining ring is provided at one end of the pull sleeve 3 embedded in the through groove inside the movable mold base plate 1, and an inner ring for resisting the retaining ring is provided at the end of the through groove facing the fixed mold plate 5. When the retaining ring of the pull sleeve 3 contacts the inner ring of the through groove, the pull sleeve 3 cannot continue to move, thereby preventing the pull sleeve 3 from being directly separated from the movable mold base plate 1, and a retaining ring is provided at one end of the pull rod 4 embedded in the pull sleeve 3, and a convex ring for resisting the retaining ring is provided at the end of the pull sleeve 3 facing away from the retaining ring. When the convex ring inside the pull sleeve 3 contacts the retaining ring of the pull rod 4, the pull sleeve 3 continues to move right, which will pull the pull rod 4 to move right, thereby driving the push rod fixing plate 10 to move horizontally, and a retreat groove (such as Figure 3 As shown), when the movable mold base plate 1 and the fixed mold plate 5 are fitted together, the end of the pull sleeve 3 can be received in the retreat groove.
[0018] In the preferred technical solution, a push rod 15 for resetting the push rod fixing plate 10 is connected to the middle of the push rod fixing plate 10 , and one end of the push rod 15 is connected to a cylinder for providing power for the push rod 15 to extend and retract.
[0019] In summary, this mold adopts the molding method of fixed mold feeding and pushing out. In order to shorten the length of the mold main channel, reduce the melt pressure and heat loss of the material flow, ensure the pressure and speed required for the material to fill the cavity, shorten the filling and cooling time, and achieve the purpose of improving efficiency, reducing the amount of plastic and improving the strength of the weld mark, the positioning ring is fixed on the fixed mold base plate and the gate sleeve is set on the support plate. Before the mold trial and production, the ordinary nozzle of the injection machine is replaced with an extended nozzle to ensure that it can enter the mold and closely combine with the concave spherical surface of the gate sleeve mouth to successfully complete the injection molding process; In order to improve the safety of the mold and reduce the difficulty of taking out the parts, this mold adds a pull sleeve structure on the basis of the traditional pull rod structure, and uses the form of linkage and fixed distance between the pull sleeve and the pull rod, which greatly increases the mold opening stroke; The inclined guide column and four-open slider core pulling mechanism adopted in this mold combines the large pulling distance of the inclined guide column core pulling mechanism and the large pulling force of the inclined slider core pulling mechanism. Compared with the traditional inclined slider core pulling mechanism, the inclined guide column and four-open slider core pulling mechanism saves the workload of processing guide slides and guide grooves, and the core pulling distance is longer. In the initial stage of realizing the core pulling action, the four sliders, under the action of the push rod, produce a pushing effect similar to the push plate, making the pushing action more stable and reliable; Compared with the common inclined guide pin core pulling mechanism, the inclined guide pin four-open slider core pulling mechanism does not have a dedicated locking wedge, but adopts the form of an integral template locking slider, which has a simpler and more compact structure. The angle of the template locking part is 2° to 3° larger than that of the inclined guide pin (such as Figure 5 shown); During the separation of the movable die plate 1 and the fixed die plate 5, the main view tightly wraps the core 18 installed in the fixed die due to thermal expansion and contraction of the material. As the movable die plate 1 moves, the pull sleeve 3 installed inside it pulls the pull rod 4, and the pull rod 4 drives the push rod fixing plate 10 to achieve the ejection action. At this time, the slider push rod 6 pushes the four-open slider to move obliquely along the oblique guide column 26 to achieve core pulling, and the four-open slider 2 pushes the workpiece away from the core 18.
Claims
1. An injection mold with a fixed mold pushing out an inclined guide column and a four-open slide block, characterized in that: It comprises a fixed mold plate (5) and a movable mold base plate (1), wherein a core (18) is fixedly arranged at the center position of the surface of the fixed mold plate (5), and a cavity (24) is fixedly arranged on one end surface of the movable mold base plate (1) facing the core (18) via a screw A (25), and a four-open slider (2) is arranged around the outside of the core (18), wherein the four-open slider (2) comprises four sliders of the same size, and the four-open slider (2) is slidably arranged around the outside of the core (18) via an inclined guide column (26); The surface of the movable mold base plate (1) is slidably provided with a pull sleeve (3), the interior of the pull sleeve (3) is embedded with a pull rod (4) for sliding, the pull rod (4) is slidably connected to the fixed mold plate (5), one end of the pull rod (4) is fixedly connected to the push rod fixing plate (10) by a screw B (9), and the push rod fixing plate (10) is respectively connected to the four sliders of the four-open slider (2) through four slider push rods (6); The end of the fixed mold plate (5) facing away from the movable mold base plate (1) is connected to the support (8), the cushion block (21), and the fixed mold base plate (11) in sequence through screws C (20); a positioning ring (13) is fixedly installed on the outside of the fixed mold base plate (11) through screws D (14); a sprue sleeve (19) is provided through the middle of the core (18); one end of the sprue sleeve (19) is connected to the inside of the core (18), and the other end of the sprue sleeve (19) is fixed to the surface of the support (8) through screws E (16); A guide column (23) is fixedly arranged on the surface of the movable die base plate (1), a concave hole is opened on the surface of the fixed die plate (5), and a guide sleeve (22) for accommodating the guide column (23) to be inserted is fixedly arranged inside the concave hole.
2. The injection mold with a fixed mold pushing out an inclined guide column and a four-open slide block according to claim 1, characterized in that: The sprue sleeve (19) passes through the support (8) and the fixed mold plate (5) in sequence, and a sealing strip (17) is provided on the outside of the sprue sleeve (19), and the sealing strip (17) is arranged on the contact end surface of the support (8) and the fixed mold plate (5).
3. The injection mold with a fixed mold pushing out an inclined guide column and a four-open slider according to claim 1, characterized in that: The end of the inclined guide column (26) facing away from the four-open slide block (2) is fixed with a retaining ring (27) by means of a screw F (28).
4. The injection mold with a fixed mold pushing out an inclined guide column and a four-open slide block according to claim 1, characterized in that: The movable mold base plate (1) is provided with a through groove for accommodating the insertion of the pull sleeve (3); a retaining ring is provided at one end of the pull sleeve (3) embedded in the through groove inside the movable mold base plate (1); an inner ring for resisting the retaining ring is provided at one end of the through groove facing the fixed mold plate (5); a retaining ring is provided at one end of the pull rod (4) embedded in the pull sleeve (3); a convex ring for resisting the retaining ring is provided at one end of the pull sleeve (3) facing away from the retaining ring; and a retreat groove for accommodating the insertion of the pull sleeve (3) is provided on the surface of the fixed mold plate (5).
5. The injection mold with a fixed mold pushing out an inclined guide column and a four-open slide block according to claim 1, characterized in that: A push rod (15) for resetting the push rod fixing plate (10) is connected to the middle of the push rod fixing plate (10).
6. The molding method of the injection mold for a fixed mold pushing out an inclined guide pin and a four-open slide block according to any one of claims 1 to 5, characterized in that: The steps include: S1: Initial state, the push rod (15) pulls the push rod fixing plate (10) to be close to the fixed mold base plate (11), and the four-open sliders (2) are distributed around the outer side of the core (18), controlling the movable mold base plate (1) to be in close contact with the fixed mold plate (5). At this time, the mold cavity (24), the core (18), and the four-open sliders (2) form an injection cavity; S2: injecting the molten raw material into the injection cavity through the sprue bushing (19) by an injection device, and letting it stand for 5 to 10 seconds; S3: Control the movable mold base plate (1) and the fixed mold plate (5) to separate. As the distance between the movable mold base plate (1) and the fixed mold plate (5) increases, the pull sleeve (3) extends out of the through groove of the movable mold base plate (1), and the inner ring inside the through groove abuts against the abutment ring of the pull sleeve (3), so that the pull sleeve (3) does not separate from the through groove. As the distance between the movable mold base plate (1) and the fixed mold plate (5) continues to increase, the pull sleeve (3) cooperates with the pull rod (4) to pull the push rod fixing plate (10) toward the support (8). At this time, the push rod fixing plate (10) links the four slider push rods (6) to move, and the four slider push rods (6) push the four sliders of the four-open slider (2) to move obliquely along the direction of the oblique guide column (26) respectively until the injected workpiece is separated from the surface of the core (18), and the demolding is completed; S4: The push rod (15) pulls the push rod fixing plate (10) to move toward the fixed mold base plate (11) until it is in contact with the fixed mold base plate (11), and the push rod fixing plate (10) is linked to the four slider push rods (6) to move. The four slider push rods (6) pull the four sliders of the four-open slider (2) to move obliquely along the direction of the oblique guide column (26), so that the four-open slider (2) is distributed around the outside of the core (18), and the reset is completed.
7. The molding method of the injection mold with a fixed mold pushing out the inclined guide pillar and four-opening slide block according to claim 6, characterized in that: During the separation process of the movable mold base plate (1) and the fixed mold plate (5) in step S3, the guide column (23) is always located inside the guide sleeve (22) and slides.