An insert positioning detection mechanism and an automobile sunroof skeleton plastic part injection mold thereof

Abstract

The application relates to an insert positioning detection mechanism and an automobile sunroof framework plastic part injection mold thereof, which comprises an insert block, a positioning rod, a reversing valve, a second negative pressure mechanism, a positive pressure mechanism and a switching control assembly. The insert block is detachably connected to a movable mold, and the positioning rod is fixedly arranged on the insert block and is sleeved with an insert. The reversing valve is provided with an outlet, a first inlet and a second inlet. The first inlet is communicated with the positive pressure mechanism, and the second inlet is communicated with the second negative pressure mechanism. A gas channel is formed in the insert block and penetrates through the insert block. One end of the gas channel is opposite to the insert, and the other end of the gas channel is communicated with the outlet of the reversing valve. The switching control assembly is used for detecting whether the insert is correctly installed and controlling the reversing of the reversing valve. When there is no insert or the insert is correctly installed, the state of adsorbing the insert can be maintained. When the insert is installed reversely, the outlet is switched to be communicated with the first inlet. At this time, the positive pressure mechanism acts in the gas channel, and the insert can be automatically blown out of the positioning rod.

Description

Technical Field

[0001] This invention relates to the field of molds, and in particular to an insert positioning and detection mechanism and its injection mold for plastic parts of an automotive sunroof frame. Background Technology

[0002] Insert injection molding is a one-piece molding process in which inserts (usually metal, fiber or other prefabricated parts) are pre-placed in an injection mold, and then the inserts are firmly bonded to the plastic after molten plastic is injected and cooled to solidify.

[0003] Inserts such as Figure 1 As shown, the insert 3 is a non-metallic insert with a cylindrical I-shaped appearance. A through hole 31 is provided in the middle of the insert 3, through which cylindrical connectors such as screws can pass. On the two end faces of the insert 3, there are annular deep grooves 32 and annular shallow grooves 33 that are opposite to each other but of different depths. The shallow groove 33 is used to install sealing components such as gaskets. The inner wall of the deep groove 32 has a ring of teeth 321 along the circumferential direction for mating with related components, increasing the mechanical engagement between the insert 3 and related components.

[0004] like Figure 2 As shown, the insert 3 needs to be manually placed on the positioning rod 12 of the mold, and is positioned by adsorption through the negative pressure mechanism on the mold, and then integrally injection molded with the plastic part.

[0005] Although there are differences between the two ends of the insert, they are not very obvious, so operators often install them backwards. When installed backwards, the insert needs to be removed by heat fusion and then reinstalled by heat fusion. This not only affects the aesthetics of the plastic part but also the connection strength between the insert and the plastic part. Therefore, to reduce the chance of backwards installation, currently, paint is applied to the bottom wall of the deep or shallow groove to help operators distinguish the installation direction. While this reduces the error rate, mistakes can still occur due to carelessness, making complete avoidance difficult. Introducing an automated installation device would require specialized research and development and investment in equipment such as robotic arms, a significant burden for small businesses. Summary of the Invention

[0006] To address the issue of incorrect installation orientation during manual installation of inserts, this application provides an insert positioning and detection mechanism and its injection mold for automotive sunroof frame plastic parts.

[0007] The technical solution provided in this application for an insert positioning and detection mechanism and its injection mold for automotive sunroof frame plastic parts is as follows:

[0008] An insert positioning and detection mechanism and its injection mold for plastic parts of an automotive sunroof frame include an insert, a positioning rod, a reversing valve, a second negative pressure mechanism, a positive pressure mechanism, and a switching control component. The insert is detachably connected to the moving mold, and the positioning rod is fixedly mounted on the insert. The positioning rod is for the insert to be fitted.

[0009] The reversing valve includes a valve body, a first spring, and a piston assembly. The valve body is installed in a insert and has a reversing chamber. The side wall of the reversing chamber has an outlet, a first inlet, and a second inlet. The piston assembly slides in the reversing chamber to switch the connection between the outlet and the first inlet or the second inlet. The first inlet is connected to a positive pressure mechanism, and the second inlet is connected to a second negative pressure mechanism. The first spring is disposed in the reversing chamber to drive the piston assembly to always move until the outlet is connected to the second inlet.

[0010] An air passage is provided through the insert, one end of which is positioned opposite the deep and shallow grooves of the insert, and the other end of which is connected to the outlet of the reversing valve.

[0011] The switching control component includes a first negative pressure mechanism, two hollow mounting posts, a first channel and a second channel through the insert. One end of the first channel and the second channel are connected to a deep groove or a shallow groove. The other end of the first channel is connected to the outside. The other end of the second channel is connected to the first negative pressure mechanism. The two hollow mounting posts are respectively set on the end of the first channel and the second channel near the insert. The length of the hollow mounting post extending out of the insert is equal to the depth L1 of the shallow groove.

[0012] A third channel is provided on the side wall of the second channel to connect to the reversing cavity. When the insert is installed in reverse, the insert blocks the hollow mounting column, and the second negative pressure mechanism drives the piston assembly to move to the outlet and connect with the first inlet.

[0013] By adopting the above technical solution, when no insert is installed or the insert is installed correctly, the two hollow mounting posts are not blocked. Since the first channel is always connected to the outside, the first negative pressure mechanism in the switching control component will not act completely on the piston assembly. Therefore, the spring force of the first spring can keep the outlet of the reversing valve connected to the second inlet. At this time, the air passage is under negative pressure, which can maintain the state of adsorbing the insert. When the insert is installed backward, the bottom wall of the shallow groove will adhere to the surface of the hollow mounting post, thereby blocking the hollow mounting post. At this time, the first channel is blocked, and the negative pressure of the first negative pressure mechanism will act completely in the reversing chamber, causing the piston assembly to move against the spring force of the first spring, thereby connecting the outlet to the first inlet. At this time, the positive pressure mechanism acts in the air passage, which can automatically blow the insert out of the positioning rod.

[0014] Preferably, it further includes an anti-dislodgement component to prevent the insert from dislodging from the positioning rod under the blowing of the positive pressure mechanism. The anti-dislodgement component includes a drive rod, a stop block, and a limiting component. The positioning rod and the insert are provided with a first sliding groove along the axial direction. The drive rod slides in the first sliding groove. A second sliding groove is provided through the side wall of the first sliding groove. The stop block slides in the second sliding groove. A connecting channel is provided in the insert. The connecting channel connects the first sliding groove and the air passage. A first block is provided at the end of the first sliding groove that communicates with the outside. A second block is provided at the end of the connecting channel that communicates with the outside. The limiting component is partially located in the first sliding groove and is used to limit the sliding range of the drive rod.

[0015] The stop block and the drive rod have mutually cooperating first inclined surfaces at their respective ends, and the stop block has a second inclined surface at its end away from the drive rod facing the insert. The stop block and the second slide groove are interference-fitted, and the end of the first slide groove away from the first block has a through-hole. When the second negative pressure mechanism acts on the air passage, the bottom end of the drive rod abuts against the limiting member, and the stop block is located in the second slide groove. When the positive pressure mechanism acts on the air passage, the drive rod moves to the side away from the first block and abuts against the end wall of the first slide groove, the end of the stop block moves out of the second slide groove, and the insert is blown to abut against the second inclined surface.

[0016] By adopting the above technical solution, when the insert is installed or normally installed, the negative pressure mechanism acts on the air passage, and the stop block is located in the second slide groove, so the stop block will not affect the installation of the insert. When the air passage switches to positive pressure after the insert is installed backwards, the drive rod is blown by the positive pressure airflow and moves the end of the stop block out of the second slide groove. At the same time, when the insert is also blown out by the positive pressure airflow, it can be intercepted by the stop block when it passes by the stop block, thereby preventing the insert from completely detaching from the positioning rod. After a certain period of time, since the first channel and the second channel are restored to unobstructed flow after the insert is blown out, the reversing valve will automatically reset, so that the air passage switches back to negative pressure. At this time, the movement of the drive rod will not change the position of the stop block. The operator removes the reversed insert, and the stop block automatically resets back into the second slide groove.

[0017] Preferably, it also includes an air passage sealing component that seals the air passage and the second channel after mold closing.

[0018] Preferably, the airway sealing component and the limiting component are the same part, both including a fixed block, two second springs and two movable blocks. A third sliding groove is formed on one side wall of the insert along the moving direction perpendicular to the drive rod. The third sliding groove connects the airway, the first sliding groove and the first channel in sequence. The two movable blocks are slidably connected in the third sliding groove and are respectively located on both sides of the drive rod. The two second springs are respectively located on both sides of the two movable blocks. The fixed block is fixedly installed on the insert by screws to block the end of the third sliding groove that communicates with the outside. One end of the two second springs abuts against the nearest movable block, and the other end of the two second springs abuts against the end wall of the third sliding groove and the fixed block. The second springs drive the two movable blocks to move toward the side that is closer to each other.

[0019] The drive rod has a chamfered surface circumferentially formed at one end facing the first block, and the movable block has a third inclined surface matching the chamfered surface at one end facing the drive rod; a protrusion is fixed at one end of the drive rod away from the first block, and a through groove is formed on the positioning rod, through which the protrusion extends out of the positioning rod;

[0020] When the air passage is under negative pressure and the mold is not closed, the drive rod abuts against the two movable blocks, which move away from the air passage and the first channel. When the air passage is under negative pressure and the mold is closed, the protrusion is driven to move by the fixed mold, and the two movable blocks move to block the air passage and the first channel respectively.

[0021] By adopting the above technical solution, the force of negative pressure on the drive rod is less than the elastic force of the second spring, which is insufficient to make the drive rod overcome the elastic force of the second spring and move out of the first slide groove. However, the force of the fixed mold on the drive rod after mold closing is sufficient to overcome the elastic force of the second spring and make the drive rod move, thereby driving the moving block to move. The moving block can automatically block the air passage and the first through groove, thereby completely blocking the two negative pressure channels and preventing the plastic melt from being absorbed into the deep groove by the negative pressure airflow during the injection molding process.

[0022] Preferably, the piston assembly includes a connecting rod and two piston heads fixed at both ends of the connecting rod. The two piston heads are used to block the first inlet and the second inlet, respectively. The outlet is located between the first inlet and the second inlet and between the two piston heads. The first spring is located on the side of the piston assembly closer to the third channel and acts on the nearest piston head.

[0023] By adopting the above technical solution, the internal structure of the reversing valve is further disclosed.

[0024] Preferably, the insert has a mounting groove for mounting the valve body, the end of the valve body is located in the mounting groove, and the valve body is fixed to the insert by screws.

[0025] This application also provides an injection mold for a plastic component of an automotive sunroof frame, employing the following technical solution:

[0026] An injection mold for a plastic component of an automotive sunroof frame, using the aforementioned insert positioning and detection mechanism.

[0027] The main technical effects of this invention are reflected in the following aspects:

[0028] 1. When the insert is not installed or is installed correctly, the two hollow mounting posts are not blocked. Since the first channel is always connected to the outside, the first negative pressure mechanism in the switching control component will not act completely on the piston assembly. Therefore, the spring force of the first spring can keep the outlet of the reversing valve connected to the second inlet. At this time, the air passage is under negative pressure, which can maintain the state of adsorbing the insert. When the insert is installed backward, the bottom wall of the shallow groove will adhere to the surface of the hollow mounting post, thereby blocking the hollow mounting post. At this time, the first channel is blocked, the second negative pressure mechanism continues to control the insert, and the negative pressure of the first negative pressure mechanism will act completely in the reversing cavity, causing the piston assembly to move against the spring force of the first spring, thereby switching the outlet to connect with the first inlet. At this time, the positive pressure mechanism acts in the air passage, which can automatically blow the insert out of the positioning rod.

[0029] 2. When the insert is installed normally, the negative pressure mechanism acts on the air passage, and the position of the stop block is far from the second slide port. The stop block and the magnetic block are attracted to each other. At this time, the magnetic block is not attracted to the insert, and the insert can be normally attracted by the negative pressure. When the insert is installed backwards and the air passage switches to positive pressure, the drive rod moves and drives the stop block to the second slide port. When the insert is blown out by the positive pressure, it will be attracted by the stop block, thus preventing the insert from completely detaching from the positioning rod. After a certain period of time, since the first and second channels are unobstructed after the insert is blown out, the reversing valve will automatically reset, and the air passage will switch back to negative pressure. At this time, the movement of the drive rod will not change the position of the stop block. The operator can remove the backwards inserted. Only then will the stop block be attracted by the magnetic block again and reset to the state where it cannot attract the insert. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the insert in this application.

[0031] Figure 2 This is a schematic diagram of the structure of the insert molded within the plastic part in this application.

[0032] Figure 3 This is a partial structural schematic diagram of the injection mold for the plastic part of the car sunroof frame according to an embodiment of this application.

[0033] Figure 4 This is a schematic diagram of the structure when the insert of the embodiment of this application is correctly installed.

[0034] Figure 5 It is along Figure 4 A cross-sectional view along line AA in the middle.

[0035] Figure 6 yes Figure 5 Enlarged view of point B in the middle.

[0036] Figure 7 This is a cross-sectional view of the reversing valve according to an embodiment of this application.

[0037] Figure 8 This is a cross-sectional view of the insert positioning detection mechanism in the embodiment of this application when the insert is incorrectly installed.

[0038] Figure 9 This is a cross-sectional view of the insert positioning and detection mechanism after mold closing in an embodiment of this application.

[0039] Explanation of reference numerals in the attached drawings: 01, Moving mold; 02, Fixed mold; 1, Insert; 11, Connecting channel; 12, Positioning rod; 121, Through groove; 13, Air passage; 15, First slide groove; 16, Second slide groove; 18, Third slide groove; 19, Mounting groove; 2, Reversing valve; 21, Valve body; 211, End cap; 22, First spring; 23, Reversing chamber; 24, Outlet; 25, First inlet; 26, Second inlet; 27, Connecting rod; 28, Piston head; 3, Insert; 31, Through hole; 32, Deep groove 321. Toothed groove; 33. Shallow groove; 4. Switching control component; 41. Hollow mounting post; 42. First channel; 43. Second channel; 44. Third channel; 5. Anti-detachment component; 51. Drive rod; 511. Chamfered surface; 512. Protrusion; 513. Balance hole; 52. Stop block; 521. First inclined surface; 522. Second inclined surface; 61. Fixed block; 62. Second spring; 63. Moving block; 631. Third inclined surface; 71. First block; 72. Second block. Detailed Implementation

[0040] The following is in conjunction with the appendix Figures 1-9 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0041] This application discloses an insert positioning and detection mechanism and its injection mold for automotive sunroof frame plastic parts.

[0042] Reference Figures 1-7 An insert positioning and detection mechanism and its automotive sunroof frame plastic injection mold include an insert 1, a positioning rod 12, a reversing valve 2, a second negative pressure mechanism, a positive pressure mechanism and a switching control component 4. The insert 1 is detachably connected to the moving mold 01, and the positioning rod 12 is fixedly set on the insert 1. The positioning rod 12 is used for the insert 3 to be fitted.

[0043] Reference Figure 5 and Figure 7The reversing valve 2 includes a valve body 21, a first spring 22, and a piston assembly. The valve body 21 is installed in the insert 1. A reversing chamber 23 is provided in the valve body 21. An outlet 24, a first inlet 25, and a second inlet 26 are provided on the side wall of the reversing chamber 23. The piston assembly slides in the reversing chamber 23 to switch the connection between the outlet 24 and the first inlet 25 or the second inlet 26. The first inlet 25 is connected to a positive pressure mechanism, and the second inlet 26 is connected to a second negative pressure mechanism. The first spring 22 is provided in the reversing chamber 23 to drive the piston assembly to always move until the outlet 24 is connected to the second inlet 26.

[0044] Reference Figure 5 and Figure 7 An air passage 13 is provided through the insert 1. One end of the air passage 13 is set directly opposite the deep groove 32 and shallow groove 33 of the insert 3, and the other end of the air passage 13 is connected to the outlet 24 of the reversing valve 2.

[0045] Reference Figures 5-7 The switching control component 4 includes a first negative pressure mechanism, two hollow mounting posts 41, a first channel 42 and a second channel 43 through the insert 1. One end of the first channel 42 and the second channel 43 are connected to a deep groove 32 or a shallow groove 33. The other end of the first channel 42 is connected to the outside. The other end of the second channel 43 is connected to the first negative pressure mechanism. The two hollow mounting posts 41 are respectively set on the end of the first channel 42 and the second channel 43 near the insert 3. The length of the hollow mounting post 41 extending out of the insert 1 is equal to the depth L1 of the shallow groove 33.

[0046] Reference Figures 5-8 The second channel 43 has a third channel 44 on its side wall that connects to the reversing cavity 23. When the insert 3 is installed in reverse, the insert 3 blocks the hollow mounting column 41, and the first negative pressure mechanism drives the piston assembly to move to the outlet 24 and connect with the first inlet 25.

[0047] Reference Figure 5 The air passage 13 is connected to the outlet 24 of the reversing valve 2, the first channel 42 is connected to the first negative pressure mechanism, the first inlet 25 of the reversing valve 2 is connected to the positive pressure mechanism, and the second inlet 26 of the reversing valve 2 is connected to the second negative pressure mechanism through air pipes.

[0048] Reference Figures 5-8When the insert 3 is not installed or is installed correctly, the two hollow mounting posts 41 are not blocked. Since the first channel 42 is always connected to the outside, the first negative pressure mechanism in the switching control assembly 4 will not act completely on the piston assembly. Therefore, the elastic force of the first spring 22 can keep the outlet 24 of the reversing valve 2 connected to the second inlet 26. At this time, the air passage 13 is under negative pressure, which can keep the state of adsorbing the insert 3. When the insert 3 is installed backward, the bottom wall of the shallow groove 33 will adhere to the surface of the hollow mounting post 41, thereby blocking the hollow mounting post 41. At this time, the first channel 42 is blocked, and the negative pressure of the first negative pressure mechanism will act completely in the reversing chamber 23, causing the piston assembly to move against the elastic force of the first spring 22, thereby switching the outlet 24 to connect with the first inlet 25. At this time, the positive pressure mechanism acts in the air passage 13, which can automatically blow the insert 3 out of the positioning rod 12.

[0049] Reference Figures 5-8 The first negative pressure mechanism and the second negative pressure mechanism are usually vacuum pumps, and the positive pressure mechanism is usually a fan. If there are multiple insert positioning and detection mechanisms, multiple first inlets 25 are uniformly connected to the positive pressure mechanism, multiple second inlets 26 are uniformly connected to the second negative pressure mechanism, and multiple second channels 43 are uniformly connected to the first negative pressure mechanism.

[0050] Reference Figure 5 and Figure 7 The piston assembly includes a connecting rod 27 and two piston heads 28 fixed at both ends of the connecting rod 27. The two piston heads 28 are used to block the first inlet 25 and the second inlet 26, respectively. The outlet 24 is located between the first inlet 25 and the second inlet 26 and between the two piston heads 28. The first spring 22 is located on the side of the piston assembly closer to the third channel 44 and acts on the nearest piston head 28. In order to limit the movement range of the piston assembly and to provide installation space for the first spring 22, the first spring 22 is in a compressed state, and its two ends abut against the nearest piston head 28 and a certain step surface, respectively. The reversing chamber 23 has multiple steps, and the end of the valve body 21 away from the third channel 44 is fixed with an end cap 211 that blocks the end of the reversing chamber 23 by screws.

[0051] Reference Figure 5 The insert 1 has an installation groove 19 for mounting the valve body 21. The end of the valve body 21 is located in the installation groove 19, and the valve body 21 is fixed to the insert 1 by screws.

[0052] Reference Figure 5 and Figure 6It also includes an anti-disengagement component 5 to prevent the insert 3 from disengaging from the positioning rod 12 under the blowing of the positive pressure mechanism. The anti-disengagement component 5 includes a drive rod 51, a stop block 52, and a limiting component. The positioning rod 12 and the insert 1 have a first sliding groove 15 along the axial direction. The drive rod 51 slides in the first sliding groove 15. A second sliding groove 16 is formed through the side wall of the first sliding groove 15. The stop block 52 slides in the second sliding groove 16. A connecting channel 11 is formed in the insert 1, which connects the first sliding groove 15 and the air passage 13. A first block 71 is provided at one end of the first sliding groove 15 that communicates with the outside, and a second block 72 is provided at the other end of the connecting channel 11 that communicates with the outside. The limiting component is located in the first sliding groove 15 and is used to limit the sliding range of the drive rod 51. The first block 71 and the second block 72 are both fixed to the insert 1 by screws.

[0053] Reference Figure 5 and Figure 6 The stop block 52 and the drive rod 51 are respectively provided with a first inclined surface 521 that cooperates with each other at their close ends. The end of the stop block 52 away from the drive rod 51 is provided with a second inclined surface 522 facing the insert 1. The stop block 52 and the second slide groove 16 are interference fit. The end of the first slide groove 15 away from the first block 71 is provided with a balance hole 513. When the second negative pressure mechanism acts on the air passage 13, the bottom end of the drive rod 51 abuts against the limiting member, and the stop block 52 is located in the second slide groove 16. When the positive pressure mechanism acts on the air passage 13, the drive rod 51 moves to the side away from the first block 71 and abuts against the end wall of the first slide groove 15. The end of the stop block 52 moves out of the second slide groove 16, and the insert 3 is blown to abut against the second inclined surface 522.

[0054] Reference Figure 5 and Figure 6 When the insert 3 is installed or normally installed, the negative pressure mechanism acts on the air passage 13, and the stop block 52 is located in the second slide groove 16. The stop block 52 will not affect the installation of the insert 3. When the insert 3 is installed backwards and the air passage 13 switches to positive pressure, the drive rod 51 is blown by the positive pressure airflow and moves the end of the stop block 52 out of the second slide groove 16. At the same time, when the insert 3 is also blown out by the positive pressure airflow, it can be intercepted by the stop block 52 when it passes through the stop block 52, thereby preventing the insert 3 from completely detaching from the positioning rod 12. After a certain period of time, since the first channel 42 and the second channel 43 are restored to unobstructed flow after the insert 3 is blown out, the reversing valve 2 will automatically reset, so that the air passage 13 switches back to negative pressure. At this time, the movement of the drive rod 51 will not change the position of the stop block 52. The operator removes the reversed insert 3, and the stop block 52 automatically resets back into the second slide groove 16.

[0055] Reference Figures 5-9It also includes an air passage 13 sealing component that seals the air passage 13 and the second channel 43 after mold closing. The airway 13 sealing component and the limiting component are the same part, both including a fixed blocking block 61, two second springs 62 and two movable blocking blocks 63. A third sliding groove 18 is provided on one end side wall of the insert 1 along the moving direction perpendicular to the drive rod 51. The third sliding groove 18 connects the airway 13, the first sliding groove 15 and the first channel 42 in sequence. The two movable blocking blocks 63 are slidably connected in the third sliding groove 18 and are located on both sides of the drive rod 51. The two second springs 62 are located on both sides of the two movable blocking blocks 63. The fixed blocking block 61 is fixedly installed on the insert 1 by screws to block the end of the third sliding groove 18 that is connected to the outside. One end of the two second springs 62 abuts against the nearest movable blocking block 63, and the other end of the two second springs 62 abuts against the end wall of the third sliding groove 18 and the fixed blocking block 61. The second springs 62 drive the two movable blocking blocks 63 to move toward the side that is closer to each other.

[0056] Reference Figures 5-9 The drive rod 51 has a chamfered surface 511 around its circumference at one end facing the first block 71, and the movable block 63 has a third inclined surface 631 that matches the chamfered surface 511 at one end facing the drive rod 51; a protrusion 512 is fixed at one end of the drive rod 51 away from the first block 71, and a through groove 121 is provided on the positioning rod 12, through which the protrusion 512 extends out of the positioning rod 12.

[0057] Reference Figures 5-9 When the air passage 13 is under negative pressure and the mold is not closed, the drive rod 51 abuts against the two movable blocks 63, and the two movable blocks 63 move away from the air passage 13 and the first channel 42; when the air passage 13 is under negative pressure and the mold is closed, the protrusion 512 is driven to move by the fixed mold 02, and the two movable blocks 63 move to block the air passage 13 and the first channel 42 respectively.

[0058] Reference Figures 5-9 The fixed mold 02 has a positioning groove that matches the end of the positioning rod 12. After the mold is closed, the fixed mold 02 abuts against the insert 3. The force of the negative pressure on the drive rod 51 is less than the elastic force of the second spring 62, which is insufficient to make the drive rod 51 overcome the elastic force of the second spring 62 and move out of the first slide groove 15. However, after the mold is closed, the force of the fixed mold 02 on the drive rod 51 is sufficient to overcome the elastic force of the second spring 62 and make the drive rod 51 move, thereby driving the moving block 63 to move. The moving block 63 can automatically block the air passage 13 and the first through groove 121, thereby completely blocking these two negative pressure channels and preventing the plastic melt from being absorbed into the deep groove 32 by the negative pressure airflow during the injection molding process.

[0059] Reference Figure 2 and Figure 3The above-mentioned insert positioning and detection mechanism is used in the injection mold of the plastic part of the car sunroof frame of this application.

[0060] 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. An insert positioning and detection mechanism, characterized in that: It includes an insert (1), a positioning rod (12), a reversing valve (2), a second negative pressure mechanism, a positive pressure mechanism, and a switching control assembly (4). The insert (1) is detachably connected to the moving mold (01), and the positioning rod (12) is fixedly set on the insert (1). The positioning rod (12) is used for the insert (3) to be fitted. The reversing valve (2) includes a valve body (21), a first spring (22), and a piston assembly. The valve body (21) is installed in the insert (1). A reversing chamber (23) is opened in the valve body (21). An outlet (24), a first inlet (25), and a second inlet (26) are opened on the side wall of the reversing chamber (23). The piston assembly slides in the reversing chamber (23) to switch the connection between the outlet (24) and the first inlet (25) or the second inlet (26). The first inlet (25) is connected to the positive pressure mechanism, and the second inlet (26) is connected to the second negative pressure mechanism. The first spring (22) is set in the reversing chamber (23) to drive the piston assembly to always move until the outlet (24) is connected to the second inlet (26). An air passage (13) is provided through the insert (1). One end of the air passage (13) is set opposite to the deep groove (32) and shallow groove (33) of the insert (3). The other end of the air passage (13) is connected to the outlet (24) of the reversing valve (2). The switching control component (4) includes a first negative pressure mechanism, two hollow mounting posts (41), a first channel (42) and a second channel (43) through the insert (1). One end of the first channel (42) and the second channel (43) are connected to a deep groove (32) or a shallow groove (33). The other end of the first channel (42) is connected to the outside. The other end of the second channel (43) is connected to the first negative pressure mechanism. The two hollow mounting posts (41) are respectively set on the end of the first channel (42) and the second channel (43) near the insert (3). The length of the hollow mounting post (41) extending out of the insert (1) is equal to the depth L1 of the shallow groove (33). The second channel (43) has a third channel (44) on its side wall that connects to the reversing cavity (23). When the insert (3) is installed in reverse, the insert (3) blocks the hollow mounting post (41), and the first negative pressure mechanism drives the piston assembly to move to the outlet (24) and connect with the first inlet (25). The piston assembly includes a connecting rod (27) and two piston heads (28) fixed at both ends of the connecting rod (27). The two piston heads (28) are used to block the first inlet (25) and the second inlet (26) respectively. The outlet (24) is located between the first inlet (25) and the second inlet (26) and between the two piston heads (28). The first spring (22) is located on the side of the piston assembly near the third channel (44) and acts on the nearest piston head (28).

2. The insert positioning and detection mechanism according to claim 1, characterized in that: It also includes an anti-detachment component (5) for preventing the insert (3) from detaching from the positioning rod (12) under the blowing of the positive pressure mechanism. The anti-detachment component (5) includes a drive rod (51), a stop block (52) and a limiting component. The positioning rod (12) and the insert (1) are provided with a first sliding groove (15) along the axial direction. The drive rod (51) slides in the first sliding groove (15). The side wall of the first sliding groove (15) is provided with a second sliding groove (16). The stop block (52) slides in the second sliding groove (16). The insert (1) is provided with a connecting channel (11). The connecting channel (11) connects the first sliding groove (15) and the air passage (13). The end of the first sliding groove (15) that is connected to the outside is provided with a first blocking block (71). The end of the connecting channel (11) that is connected to the outside is provided with a second blocking block (72). The limiting component is located in the first sliding groove (15) and is used to limit the sliding range of the drive rod (51). The stop block (52) and the drive rod (51) have mutually cooperating first inclined surfaces (521) at their respective ends, and the stop block (52) away from the drive rod (51) has a second inclined surface (522) facing the insert (1). The stop block (52) and the second slide groove (16) are interference-fitted. The end of the first slide groove (15) away from the first block (71) has a through-hole (513). When the second negative pressure mechanism When the positive pressure mechanism acts on the airway (13), the bottom end of the drive rod (51) abuts against the limiting member, and the stop block (52) is located in the second slide groove (16); when the positive pressure mechanism acts on the airway (13), the drive rod (51) moves to the side away from the first block (71) and abuts against the end wall of the first slide groove (15), the end of the stop block (52) moves out of the second slide groove (16), and the insert (3) is blown to abut against the second inclined surface (522).

3. The insert positioning and detection mechanism according to claim 2, characterized in that: It also includes an air passage (13) sealing component that seals the air passage (13) and the second channel (43) after mold closing.

4. The insert positioning and detection mechanism according to claim 3, characterized in that: The air passage (13) sealing component and the limiting component are the same part, both including a fixed blocking block (61), two second springs (62) and two movable blocking blocks (63). A third sliding groove (18) is provided on one end side wall of the insert (1) along the moving direction perpendicular to the drive rod (51). The third sliding groove (18) is connected in sequence to the air passage (13), the first sliding groove (15) and the first channel (42). The two movable blocking blocks (63) are slidably connected in the third sliding groove (18) and are located on both sides of the drive rod (51). The second spring (62) is located on both sides of the two movable blocks (63). The fixed block (61) is fixedly installed on the insert (1) by screws to block one end of the third slide (18) that is connected to the outside. One end of the two second springs (62) abuts against the nearest movable block (63), and the other end of the two second springs (62) abuts against the end wall of the third slide (18) and the fixed block (61). The second spring (62) drives the two movable blocks (63) to move toward the side that is closer to each other. The drive rod (51) has a chamfered surface (511) circumferentially formed at one end facing the first block (71), and the movable block (63) has a third inclined surface (631) matching the chamfered surface (511) at one end facing the drive rod (51); a protrusion (512) is fixed at one end of the drive rod (51) away from the first block (71), and a through groove (121) is formed on the positioning rod (12), through which the protrusion (512) extends out of the positioning rod (12); When the air passage (13) is under negative pressure and the mold is not closed, the drive rod (51) abuts against the two movable blocks (63), and the two movable blocks (63) move away from the air passage (13) and the first channel (42); when the air passage (13) is under negative pressure and the mold is closed, the protrusion (512) is driven to move by the fixed mold (02), and the two movable blocks (63) move to block the air passage (13) and the first channel (42) respectively.

5. The insert positioning and detection mechanism according to claim 1, characterized in that: The insert (1) has an installation groove (19) for installing the valve body (21). The end of the valve body (21) is located in the installation groove (19). The valve body (21) is fixed to the insert (1) by screws.

6. An injection mold for a plastic component of an automotive sunroof frame, characterized in that: The insert positioning and detection mechanism described in any one of claims 1-5 is applied.

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