A quick mold changing mechanism for a dual-color injection molding and IML process

Abstract

The utility model provides a kind of quick die changing mechanism of double-color injection molding and IML process, including rotary drive mechanism, rotary drive mechanism side is connected with swivel plate, swivel plate is installed mould away from rotary drive mechanism side;Swivel plate is connected with positioning block one side close to rotary drive mechanism, and two positioning blocks are separately arranged on the both sides of rotary drive mechanism;Positioning block is equipped with locating groove, and rotary drive mechanism side wall is connected with positioning mechanism, and the positioning shaft of positioning mechanism is inserted into locating groove to position swivel plate.The utility model realizes the quick switching and high repeat positioning accuracy of mould station, ensures the repeat positioning accuracy of mould, and improves product quality.

Description

Technical Field

[0001] This utility model belongs to the field of injection molding technology, specifically relating to a quick mold change mechanism for two-color injection molding and IML process. Background Technology

[0002] Two-color injection molding involves injecting molten metal of different colors or materials in two separate injection stages, fusing the two plastics to create different textures and color layers. IML (In-Mold Molding) involves embedding a pre-printed film into a mold, then injecting the molten metal and film together to achieve high-precision patterns, textures, or special effects. Combining two-color injection molding with IML satisfies both aesthetic and functional requirements (such as rigid-software integration), enhancing user experience and making it suitable for products requiring high integration and complex designs. The combination of two-color injection molding and IML reduces post-processing steps, mold complexity, manufacturing costs, and increases product added value. Two-color injection molding typically involves two materials injected sequentially from two injection ports, with a rotating mechanism switching the injection. The positioning of this rotating mechanism usually relies on a servo motor and a linear encoder working together to ensure accurate positioning after the mold rotates 180 degrees. If any component malfunctions in this positioning method, inaccurate positioning can occur, affecting product quality.

[0003] Therefore, the above problems urgently need to be solved. Utility Model Content

[0004] Purpose of the utility model: In order to overcome the above shortcomings, this utility model provides a quick mold change mechanism for two-color injection molding and IML process, which realizes rapid switching of mold station and high repeatability positioning accuracy.

[0005] Technical Solution: To achieve the above objectives, this utility model provides a quick mold change mechanism for two-color injection molding and IML processes. It includes a rotary drive mechanism, a rotating plate connected to one side of the rotary drive mechanism, and a mold mounted on the side of the rotating plate away from the rotary drive mechanism. A positioning block is connected to the side of the rotating plate closest to the rotary drive mechanism, with two positioning blocks distributed on either side of the rotary drive mechanism. Each positioning block has a positioning groove, and a positioning mechanism is connected to the side wall of the rotary drive mechanism. The positioning mechanism's positioning shaft extends into the positioning groove to position the rotating plate. This utility model is used for quick mold change in injection molding. The quick mold change mechanism is connected to a two-color injection molding machine, connecting the mold to the rotating plate. A pre-cut film is placed into the mold, and then mold closing and injection molding begin. During injection molding, molten material is injected into the injection port of the mold containing the film. Then, the rotary drive mechanism drives the rotating plate to rotate, injecting molten material into the other injection port of the injection mold. When the rotating plate is in the working position, the positioning shaft of the positioning mechanism extends into the positioning block to lock the rotating plate in place, achieving precise positioning of the working position, ensuring the mold's repeatability, and improving product quality.

[0006] Furthermore, in the aforementioned rapid mold change mechanism for two-color injection molding and IML processes, a connecting frame is connected to the side wall of the rotary drive mechanism. The positioning mechanism is connected to the rotary drive mechanism via the connecting frame. The positioning mechanism is a push-pull electromagnet, comprising a magnetic core, an electromagnetic coil, and a spring. The magnetic core serves as a positioning shaft, and the electromagnetic coil is connected inside the housing. The magnetic core passes through the electromagnetic coil, with one end extending out of the housing. A limiting ring is fitted onto the end of the magnetic core extending out of the housing, and the spring is fitted onto the outside of the magnetic core. Both ends of the spring are connected to the limiting ring connecting frame. A positioning part is provided at the end of the magnetic core extending out of the housing, and the positioning part and positioning groove are correspondingly provided. When the rotary drive mechanism drives the rotary plate to 0° or 180°, the positioning part extends into the positioning groove. The push-pull electromagnet responds quickly; when the magnetic core retracts and resets, the positioning part disengages from the positioning groove, and the rotary plate rotates. When the rotary plate is in the working position, the positioning mechanism is energized, the electromagnetic coil pushes the magnetic core out, the limiting ring drives the spring to compress, and the positioning part extends into the positioning groove, achieving rapid locking and unlocking, improving mold change speed and accuracy.

[0007] Furthermore, in the aforementioned quick mold change mechanism for two-color injection molding and IML processes, the connecting frame has an L-shaped cross-section. The connecting frame includes a vertical end and a horizontal end. The vertical end is connected to the rotary drive mechanism, and the housing is connected to the side of the vertical end away from the rotary drive mechanism. A pin sleeve is connected to the horizontal end, with its axis perpendicular to the bottom surface of the rotary plate. The magnetic core passes through the pin sleeve, and the magnetic core and pin sleeve are in a clearance fit. The pin sleeve guides the magnetic core, preventing it from shifting and ensuring that the positioning part smoothly inserts into the positioning groove, thus ensuring accurate positioning.

[0008] Furthermore, in the aforementioned quick mold change mechanism for two-color injection molding and IML processes, the positioning part includes a guide surface and a positioning surface. The positioning surface is arc-shaped along the radial direction of the magnetic core, and the guide surface is an inclined surface extending outward from the positioning surface. The guide surfaces are respectively located on both sides of the positioning surface. When the positioning part rises into the positioning groove, the positioning surface connected to the guide surface first enters the positioning groove. If the rotating plate overshoots, the guide surface and one side of the positioning groove opening abut against each other, applying a thrust to the positioning groove opening, causing the rotating plate to deflect and the positioning part to extend into the positioning groove. At this time, there is still a slight deviation. The positioning part continues to extend into the positioning groove, and the guide surface and the corresponding inclined surface of the positioning groove abut against each other. The positioning surface and the bottom surface of the positioning groove abut against each other, thereby correcting the deviation of the rotating plate. Similarly, when the rotating plate rotates 80°, the positioning part rises into the positioning groove again to correct the deviation of the rotating plate, achieving precise positioning and ensuring product quality.

[0009] Furthermore, in the aforementioned quick mold change mechanism for two-color injection molding and IML processes, the rotary drive mechanism includes a drive motor and a drive gearbox. The drive motor and drive gearbox are driven together, and the drive gearbox is driven together with the rotary plate. The drive motor drives the rotary plate to rotate via the drive gearbox. The drive gearbox includes a worm gear, which meshes with the drive motor shaft via gears. The worm gear is driven together with the rotary plate. The drive motor is a servo motor equipped with an encoder to ensure that the drive motor drives the rotary plate to a working position of 0° or 180° (allowing for some error), thus preventing collisions that could damage the equipment.

[0010] Furthermore, in the aforementioned quick mold change mechanism for two-color injection molding and IML processes, the rotary drive mechanism has a first through hole, and the rotary plate has a second through hole. The first through hole and the second through hole are coaxially arranged. The coaxial arrangement of the first through hole and the second through hole forms a through hole, providing a through channel for the ejection mechanism.

[0011] Furthermore, in the aforementioned quick mold change mechanism for two-color injection molding and IML processes, the drive gearbox includes a gearbox housing and a gear set connected inside the gearbox housing. A fixing hole is provided on the side of the gearbox housing away from the rotary plate, and the fixing hole is located along the outer periphery of the bottom of the gearbox housing. An avoidance groove is provided on the side wall of the gearbox housing, and the fixing hole is located on the lower side wall of the avoidance groove. A boss is provided around the fixing hole, and the boss and the bottom of the avoidance groove are integrally formed. The boss surrounding the fixing hole significantly increases the local thickness and strength of the area around the fixing hole, withstands the preload of the mounting bolts and vibration loads during operation, prevents deformation or cracking of the mounting part, and improves structural reliability.

[0012] Furthermore, in the aforementioned quick mold change mechanism for two-color injection molding and IML processes, the top surface of the gearbox housing is provided with a locating pin hole. A locating pin passes through the locating pin hole, and the rotary plate and the rotary drive mechanism are positioned and connected through the locating pin passing through the locating pin hole. The locating pin hole ensures that the rotary plate and the output shaft of the rotary drive mechanism are precisely aligned, ensuring accurate positioning and improving installation convenience.

[0013] Furthermore, in the aforementioned quick mold change mechanism for two-color injection molding and IML processes, two positioning mechanisms are provided, located on either side of the rotary drive mechanism. The positioning mechanisms on both sides achieve dual-sided locking, ensuring positioning accuracy and stability.

[0014] Furthermore, in the aforementioned quick mold change mechanism for two-color injection molding and IML processes, a contact switch is connected to the connecting frame, and the contact switch is located between the limiting ring and the housing. When the magnetic core retracts and resets, the limiting ring abuts against the contact switch. The contact switch is connected to the vertical end via a connecting block. Only when the magnetic core retracts and resets, and the contact switch sends a signal, can the rotary plate be rotated. The contact switch detects the state of the magnetic core to prevent collisions caused by positioning mechanism failure.

[0015] As can be seen from the above technical solution, this utility model has the following beneficial effects: The rapid mold change mechanism for two-color injection molding and IML processes of this utility model drives the rotary plate to rotate 80° through a rotary drive mechanism, combined with a positioning mechanism for precise positioning and locking, realizing rapid switching of mold stations and high repeatability positioning accuracy. The positioning part is equipped with a guide surface and a positioning surface to achieve automatic centering, stable locking, and reduced wear, enabling the mechanism to meet the requirements of rapid, accurate, reliable, and automated mold change in two-color injection molding and IML processes. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the quick mold change mechanism for two-color injection molding and IML processes of this utility model;

[0017] Figure 2 for Figure 1 A magnified view of a portion of the image;

[0018] Figure 3 This is a schematic diagram of the structure of the connecting frame;

[0019] Figure 4 for Figure 2 A magnified view of a portion of the image;

[0020] Figure 5 This is a bottom view of the quick mold change mechanism for two-color injection molding and IML process of this utility model;

[0021] Figure 6 This is a schematic diagram of the structure of the rotary drive mechanism;

[0022] Figure 7 This is a schematic diagram of the contact switch described in Example 2.

[0023] In the diagram: 1. Rotary drive mechanism; 11. Connecting frame; 111. Vertical end; 112. Horizontal end; 1121. Pin sleeve; 12. Drive motor; 13. Drive gearbox; 131. Gearbox housing; 1311. Positioning pin hole; 132. Fixing hole; 133. Clearance groove; 1331. Boss; 14. First through hole; 2. Rotary plate; 21. Positioning block; 211. Positioning groove; 3. Positioning mechanism; 31. Magnetic core; 311. Positioning part; 3111. Guide surface; 3112. Positioning surface; 32. Spring; 33. Housing; 34. Limiting ring; 4. Contact switch. Detailed Implementation

[0024] Example 1

[0025] like Figure 1-2The quick mold change mechanism for two-color injection molding and IML process shown includes a rotary drive mechanism 1, a rotary plate 2 connected to one side of the rotary drive mechanism 1, and a mold mounted on the side of the rotary plate 2 away from the rotary drive mechanism 1; a positioning block 21 connected to the side of the rotary plate 2 close to the rotary drive mechanism 1, and two positioning blocks 21 distributed on both sides of the rotary drive mechanism 1; the positioning block 21 is provided with a positioning groove 211, and a positioning mechanism 3 is connected to the side wall of the rotary drive mechanism 1, and the positioning shaft of the positioning mechanism 3 extends into the positioning groove 211 to position the rotary plate 2.

[0026] In this embodiment, a connecting frame 11 is connected to the side wall of the rotary drive mechanism 1. The positioning mechanism 3 is connected to the rotary drive mechanism 1 through the connecting frame 11. The positioning mechanism 3 is a push-pull electromagnet and includes a magnetic core 31, an electromagnetic coil, and a spring 32. The magnetic core 31 serves as a positioning shaft, and the electromagnetic coil is connected inside the housing 33. The magnetic core 31 passes through the electromagnetic coil, and one end of the magnetic core 31 extends out of the housing 33. A limiting ring 34 is fitted onto the end of the magnetic core 31 extending out of the housing 33. The spring 32 is fitted onto the outside of the magnetic core 31, and both ends of the spring 32 are connected to the connecting frame 11 of the limiting ring 34. A positioning part 311 is provided at the end of the magnetic core 31 extending out of the housing 33. The positioning part 311 and the positioning groove 211 are correspondingly provided. When the rotary drive mechanism 1 drives the rotary plate 2 to 0° or 180°, the positioning part 311 extends into the positioning groove 211. The positioning mechanism 3 is preferably a double-coil push-pull electromagnet.

[0027] like Figure 3 The quick mold change mechanism for dual-color injection molding and IML processes shown has an L-shaped cross-section for the connecting frame 11, which includes a vertical end 111 and a horizontal end 112. The vertical end 111 is connected to the rotary drive mechanism 1, and the housing 33 is connected to the side of the vertical end 111 away from the rotary drive mechanism 1. The horizontal end 112 is connected to a pin sleeve 1121, whose axis is perpendicular to the bottom surface of the rotary plate 2. The magnetic core 31 passes through the pin sleeve 1121, and the magnetic core 31 and the pin sleeve 1121 are in clearance fit. The pin sleeve 1121 guides the magnetic core 31, preventing it from shifting and ensuring that the positioning part 311 is smoothly inserted into the positioning groove 211, thus ensuring accurate positioning.

[0028] like Figure 4 The quick mold change mechanism for dual-color injection molding and IML process shown includes a positioning part 311, which includes a guide surface 3111 and a positioning surface 3112. The positioning surface 3112 is arc-shaped along the radial direction of the magnetic core 31, and the guide surface 3111 is a sloping surface extending outward from the positioning surface 3112. The guide surfaces 3111 are respectively located on both sides of the positioning surface 3112.

[0029] like Figure 5The quick mold change mechanism for two-color injection molding and IML processes shown includes a rotary drive mechanism 1 comprising a drive motor 12 and a drive gearbox 13. The drive motor 12 and drive gearbox 13 are drivenly connected, and the drive gearbox 13 is drivenly connected to the rotary plate 2. The drive motor 12 drives the rotary plate 2 to rotate via the drive gearbox 13. The drive gearbox 13 includes a worm gear, which meshes with the motor shaft of the drive motor 12 via gears. The worm gear is drivenly connected to the rotary plate 2. The drive motor 12 is a servo motor equipped with an encoder to ensure that the drive motor 12 drives the rotary plate 2 to a working position of 0° or 180° (allowing for some error), preventing collisions that could damage the equipment.

[0030] In this embodiment, the rotary drive mechanism 1 is provided with a first through hole 14, and the rotary plate 2 is provided with a second through hole. The first through hole 14 and the second through hole are coaxially arranged. The first through hole 14 and the second through hole are coaxially arranged to form a through hole, providing a through channel for the ejection mechanism.

[0031] like Figure 6 The quick mold change mechanism for two-color injection molding and IML processes shown includes a gearbox 13 with a gearbox housing 131 and a gear set connected inside the gearbox housing 131. A fixing hole 132 is provided on the side of the gearbox housing 131 away from the rotary plate 2, and the fixing hole 132 is located along the outer periphery of the bottom of the gearbox housing 131. A clearance groove 133 is provided on the side wall of the gearbox housing 131, and the fixing hole 132 is located on the lower side wall of the clearance groove 133. A boss 1331 is provided around the fixing hole 132, and the boss 1331 and the bottom of the clearance groove 133 are integrally formed. The boss 1331, located around the fixing hole, significantly increases the local thickness and strength of the area around the fixing hole, and can withstand the preload of the mounting bolts and vibration loads during operation.

[0032] In this embodiment, the top surface of the gearbox housing 131 is provided with a positioning pin hole 1311, and a positioning pin is inserted into the positioning pin hole 1311. The rotary plate 2 and the rotary drive mechanism 1 are positioned and connected by the positioning pin inserted into the positioning pin hole 1311.

[0033] In this embodiment, two positioning mechanisms 3 are provided, which are respectively located on both sides of the rotary drive mechanism 1. The positioning mechanisms 3 are provided on both sides to achieve double-sided locking and ensure positioning accuracy and stability.

[0034] In this embodiment, the connecting frame 11 is connected to a contact switch 4, which is located between the limiting ring 34 and the housing 33. When the magnetic core 31 retracts and resets, the limiting ring 34 abuts against the contact switch 4.

[0035] This invention relates to a quick mold change mechanism for injection molding. The quick mold change mechanism is connected to a two-color injection molding machine, and the mold is connected to a rotary plate 2. The rotary plate 2 has two working positions: 0° and 180°. When the rotary plate 2 is in the 0° working position, the punched film is placed into the mold, and then the mold is closed for injection molding. During the injection process, the magnetic core 31 is extended by the electromagnetic coil, and the positioning part 311 smoothly inserts into the positioning groove 211, precisely locking the rotary plate 2. Molten material is injected into the injection port of the mold containing the film. Then, the electromagnetic coil is de-energized, the spring 32 drives the magnetic core 31 to retract, and the rotation drive mechanism 1 drives the rotary plate 2 to rotate, so that the rotary plate 2 is in the 180° working position. The electromagnetic coil drives the magnetic core 31 to extend, precisely locking the rotary plate 2, and then molten material is injected into the other injection port of the injection mold.

[0036] Example 2

[0037] The difference between this embodiment and Embodiment 1 is that, as Figure 7 As shown, the connecting frame 11 is connected to a contact switch 4. When the magnetic core 31 retracts and resets, the limit ring 34 abuts against the contact switch 4. The contact switch 4 is connected to the control system and forms an interlock with the positioning mechanism 3. Specifically, the rotary drive mechanism 1 is only allowed to rotate when a signal from the contact switch 4 (magnetic core 31 retracts and resets) is received; the injection molding machine is only allowed to close the mold and perform injection when no signal from the contact switch 4 (magnetic core 31 extends) is received.

[0038] The above embodiments are exemplary and are intended to illustrate the technical concept and features of this utility model, so that those skilled in the art can understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A quick mold change mechanism for a dual color injection molding and IML process, characterized by: The device includes a rotary drive mechanism (1), a rotary plate (2) connected to one side of the rotary drive mechanism (1), and a mold installed on the side of the rotary plate (2) away from the rotary drive mechanism (1); a positioning block (21) is connected to the side of the rotary plate (2) close to the rotary drive mechanism (1), and two positioning blocks (21) are respectively located on both sides of the rotary drive mechanism (1); the positioning block (21) is provided with a positioning groove (211), and a positioning mechanism (3) is connected to the side wall of the rotary drive mechanism (1), and the positioning shaft of the positioning mechanism (3) extends into the positioning groove (211) to position the rotary plate (2).

2. The quick changeover mechanism for bi-color injection molding and IML process of claim 1, wherein: The rotating drive mechanism (1) has a connecting frame (11) connected to its side wall. The positioning mechanism (3) is connected to the rotating drive mechanism (1) through the connecting frame (11). The positioning mechanism (3) is a push-pull electromagnet. The positioning mechanism (3) includes a magnetic core (31), an electromagnetic coil, and a spring (32). The magnetic core (31) is a positioning shaft. The electromagnetic coil is connected inside the housing (33). The magnetic core (31) passes through the electromagnetic coil. One end of the magnetic core (31) extends out of the housing (33). A limiting ring (34) is fitted at one end of the protruding housing (33), and the spring (32) is fitted on the outside of the magnetic core (31). The two ends of the spring (32) abut against the limiting ring (34) and the connecting frame (11) respectively. A positioning part (311) is provided at one end of the protruding housing (33), and the positioning part (311) and the positioning groove (211) are respectively provided. When the rotary drive mechanism (1) drives the rotary plate (2) to 0° or 180°, the positioning part (311) extends into the positioning groove (211).

3. The quick changeover mechanism for bi-color injection molding and IML process of claim 2, wherein: The rotating drive mechanism (1) has a connecting frame (11) connected to its side wall. The connecting frame (11) has an L-shaped cross section. The connecting frame (11) includes a vertical end (111) and a horizontal end (112). The vertical end (111) is connected to the rotating drive mechanism (1). The housing (33) is connected to the side of the vertical end (111) away from the rotating drive mechanism (1). The horizontal end (112) is connected to a pin sleeve (1121). The pin sleeve (1121) has its axis perpendicular to the bottom surface of the rotating plate (2). The magnetic core (31) passes through the pin sleeve (1121). The magnetic core (31) and the pin sleeve (1121) are in clearance fit.

4. The quick changeover mechanism for bi-color injection molding and IML process of claim 2, wherein: The positioning part (311) includes a guide surface (3111) and a positioning surface (3112). The positioning surface (3112) is arc-shaped along the radial direction of the magnetic core (31). The guide surface (3111) is an inclined surface extending outward from the positioning surface (3112). The guide surface (3111) is respectively located on both sides of the positioning surface (3112).

5. The quick changeover mechanism for bi-color injection molding and IML process of claim 1, wherein: The rotary drive mechanism (1) includes a drive motor (12) and a drive gearbox (13). The drive motor (12) and the drive gearbox (13) are driven together. The drive gearbox (13) and the rotary plate (2) are driven together. The drive motor (12) drives the rotary plate (2) to rotate through the drive gearbox (13).

6. The quick changeover mechanism for bi-color injection molding and IML process of claim 5, wherein: The rotary drive mechanism (1) is provided with a first through hole (14), and the rotary plate (2) is provided with a second through hole. The first through hole (14) and the second through hole are coaxially arranged.

7. The quick changeover mechanism for bi-color injection molding and IML process of claim 5, wherein: The drive gearbox (13) includes a gearbox housing (131) and a gear set connected inside the gearbox housing (131). The gearbox housing (131) has a fixing hole (132) on the side away from the rotary plate (2). The fixing hole (132) is provided along the outer periphery of the bottom of the gearbox housing (131). The side wall of the gearbox housing (131) has a clearance groove (133). The fixing hole (132) is located on the lower side wall of the clearance groove (133). A boss (1331) is provided around the fixing hole (132). The boss (1331) and the bottom of the clearance groove (133) are integrally formed.

8. The quick changeover mechanism for bi-color injection molding and IML process of claim 7, wherein: The gearbox housing (131) has a positioning pin hole (1311) on its top surface. A positioning pin is inserted into the positioning pin hole (1311). The rotary plate (2) and the rotary drive mechanism (1) are positioned and connected by the positioning pin inserted into the positioning pin hole (1311).

9. The quick changeover mechanism for bi-color injection molding and IML process of claim 1, wherein: There are two positioning mechanisms (3), which are located on both sides of the rotary drive mechanism (1).

10. The quick changeover mechanism for bi-color injection molding and IML process of claim 2, wherein: The connecting frame (11) is connected to a contact switch (4). When the magnetic core (31) retracts and resets, the limiting ring (34) abuts against the contact switch (4).

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