Injection mold nut implanting device

Abstract

The present invention discloses a nut implanting device for an injection mold, which aims to solve the problem of inconvenient nut implanting operation in an injection mold. The invention includes: a nut carrier, on which the nut is loaded; an injection molding robot, a grabbing rod is provided on the injection molding robot corresponding to the nut, the grabbing rod realizes grabbing of the nut on the nut carrier, and implants the nut into the injection mold; at least two positioning components are provided between the nut carrier and the injection molding robot, the positioning component includes a positioning column and a positioning hole, the positioning column is adapted to be inserted into the positioning hole to realize positioning of the nut carrier and the injection molding robot. The injection molding robot and the nut carrier of the injection mold nut implanting device can be precisely positioned to ensure the accuracy of nut removal; the injection mold nut implanting device enables the nut to be accurately implanted into the mold without collision.

Description

Technical Field

[0001] The present invention relates to injection molding technology, and more particularly to an injection mold nut implanting device. Background Art

[0002] At present, many camera products are composed of multiple plastic parts. Different parts need to be assembled into components with the help of screws and nuts. Therefore, the relevant nuts need to be implanted in the plastic parts. The common method is to manually embed the nuts in the mold in advance, and then implant the nuts into the product after injection molding. This method has the following problems: low efficiency, high mold temperature, easy to burn hands, poor consistency of nut height position, easy fatigue of personnel, high labor cost, etc. If the nut is implanted automatically, there will be the following problems: (1) Because the injection molding robot needs to take the nut from the nut carrier, there will be a certain angle between the two devices, which will lead to problems such as nut removal deviation and nut crushing. It is difficult to adjust the two devices to the precise position by manually moving the entire nut machine to adjust the angle with the injection molding robot, and the debugging takes a long time. (2) The injection molding robot on the current production line uses a synchronous belt drive. Because the single-side gap between the nut hole and the mold pin is 0.01mm, the injection molding robot is a synchronous belt drive with an accuracy error of 0.05mm. Direct implantation will cause the nut and the mold pin to collide and wear, and even the nut cannot be implanted into the mold. Summary of the Invention

[0003] In order to overcome the above-mentioned shortcomings, the present invention provides an injection mold nut implanting device, which achieves two invention purposes. First, the injection molding robot and the nut carrier can be accurately positioned to ensure the accuracy of nut removal; second, the nuts can be accurately implanted into the mold without collision.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: an injection mold nut implanting device, comprising:

[0005] A nut carrier, on which nuts are loaded;

[0006] Injection molding robot, the injection molding robot is provided with a grabbing rod corresponding to the nut, the grabbing rod realizes grabbing of the nut on the nut carrier and implanting the nut into the injection mold;

[0007] At least two positioning components are arranged between the nut carrier and the injection molding robot. The positioning components include positioning columns and positioning holes. The positioning columns are adapted to be inserted into the positioning holes to realize the positioning of the nut carrier and the injection molding robot.

[0008] During operation, the nut is first loaded onto the nut carrier, and then the injection molding robot grabs the nut on the nut carrier, grabs the nut through the grabbing rod, and finally transfers it to the injection mold position and implants it into the injection mold. A positioning assembly is installed between the nut carrier and the injection molding robot. The positioning holes and positioning columns of the positioning assembly realize the positioning of the two to prevent deviation in their positions. Moreover, before work, when the injection molding robot performs grasping and positioning, the positioning column and the positioning hole are completely aligned and inserted into place by moving the X-axis, Y-axis, and Z-axis, so that precise positioning can be determined, and positioning is convenient. This solution achieves the first invention purpose of this patent application.

[0009] Preferably, a negative pressure adsorption groove is provided on the end surface of the grabbing rod, and the negative pressure adsorption groove passes through a negative pressure adsorption nut.

[0010] The grabbing rod grabs the nut by means of negative pressure adsorption, which is easy to operate.

[0011] Preferably, the side wall of the negative pressure adsorption tank is tilted to form a guide surface, and the outer edge of the nut slides along the guide surface during the process of the nut being adsorbed into the negative pressure adsorption tank.

[0012] When the nut is adsorbed by negative pressure, the edge of the nut moves along the guide surface, ensuring the accuracy of the nut grasping.

[0013] Preferably, an avoidance groove is provided on the bottom surface of the negative pressure adsorption tank.

[0014] The avoidance groove is set to avoid interference.

[0015] Preferably, a plurality of positioning sleeve rods are provided on the nut carrier, the upper ends of the positioning sleeve rods are tapered, and the nuts are sleeved on the positioning sleeve rods for positioning.

[0016] The positioning sleeve rod plays a role in positioning the nut to prevent the nut from deviating from the loading position, and the end of the positioning sleeve rod has a tapered structure to facilitate the installation of the nut.

[0017] Preferably, a support platform is provided on the nut carrier, a positioning groove is provided on the support platform, and the nut is loaded in the support groove.

[0018] The support table supports the nut, and the positioning groove positions the nut, which is beneficial to improving the loading accuracy of the nut.

[0019] Preferably, the upper portion of the positioning hole is a frustum-shaped structure that is larger at the top and smaller at the bottom, and the lower portion of the positioning column is a frustum-shaped structure that is larger at the top and smaller at the bottom.

[0020] The positioning posts and positioning holes of this structure facilitate fine-tuning of the position.

[0021] Preferably, a nut inserting rod is provided on the injection mold corresponding to the nut, the end of the nut inserting rod is a conical structure, a step surface is provided on the nut inserting rod, and the injection molding robot implants the nut on the nut inserting rod.

[0022] When the injection molding robot inserts the nut into the mold, the nut is precisely and reliably positioned onto the nut insert rod. The stepped surface on the nut insert rod serves to position the nut. The tapered end of the nut insert rod facilitates nut insertion and allows the nut to be precisely inserted into the mold without collision. This solution achieves the second invention objective of this patent application.

[0023] Preferably, a limit plate arranged for horizontal movement is installed on the nut carrier, and limit holes are provided corresponding to the limit plate and the positioning sleeve rod, the positioning sleeve rod passes through the limit hole, and the nut is placed between the limit hole and the positioning sleeve rod; a limit rod is installed on the injection molding robot, and a push rod is installed on the limit plate, the end of the push rod is hinged to the push block, and the end face of the push block is provided with an inclined push surface, and a positioning spring is installed between the limit plate and the nut carrier; in the process of the injection molding robot moving closer to the nut carrier, the limit rod hits the push block, driving the push block to rotate so that the limit rod slides over the push block; in the process of the injection molding robot moving away from the nut carrier, the limit rod can hit the push surface, thereby pushing the limit plate to move.

[0024] Often, multiple nuts are loaded onto a nut carrier, and the injection molding robot grabs multiple nuts at once and inserts them into the mold. If a nut is not grabbed by the injection molding robot, a missing nut may occur. In this solution, the injection molding robot first approaches the nut carrier to grab a nut. During this process, the limit rod presses against the push block, driving the push block to rotate and allowing the limit rod to slide past the push block. At this point, the push block does not obstruct the limit rod. After the grabbing rod on the injection molding robot grabs the nut, the injection molding robot moves away from the nut carrier. During this process, the limit rod can hit the push surface. At this time, if any nut on the nut carrier is not grabbed by the grabbing rod, the nut that has not been grabbed will hinder the movement of the limit plate, that is, the limit plate will not be pushed, the end of the limit rod will be stuck on the push surface, and the injection molding robot cannot move upward; only when all the nuts on the nut carrier are grabbed, the end of the limit rod will abut on the push surface, pushing the limit plate to move, so that the limit rod can slide away from the push surface, and the injection molding robot can move smoothly. This structural setting can ensure that all nuts can be implanted in the injection mold at one time, avoiding omissions.

[0025] Preferably, a hinge plate is provided on the push rod, the push block is hinged on the hinge plate, a positioning protrusion is provided on the push block, an outwardly protruding abutment block is provided on the push rod, a positioning torsion spring is installed between the push block and the hinge plate, and the lower end surface of the positioning protrusion abuts on the abutment block.

[0026] When the limit rod moves downward, it presses against the push block, causing it to rotate. After the limit rod slides away from the push block, the push block returns to its original position under the action of the positioning torsion spring, and the lower end of the positioning protrusion abuts against the abutment block. When the limit rod moves upward, the end of the limit rod abuts against the push surface, and the push block does not rotate at this time.

[0027] Compared with the prior art, the present invention has the following beneficial effects: (1) the injection molding robot and the nut carrier of the injection mold nut implanting device can be precisely positioned to ensure the accuracy of nut removal; (2) the injection mold nut implanting device enables the nuts to be accurately implanted into the mold without collision; (3) the nuts on the nut carrier can be ensured to be implanted into the injection mold all at once to avoid omission. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the positioning of the injection molding robot and the nut carrier of the present invention;

[0029] Figure 2 It is a structural schematic diagram of the nut carrier of the present invention;

[0030] Figure 3 is a cross-sectional view of the injection molding robot grasping a nut of the present invention;

[0031] Figure 4 This is a cross-sectional view showing the positioning of the injection molding robot and the nut carrier of the present invention;

[0032] Figure 5 Schematic diagram of the injection molding robot of the present invention implanting a nut into an injection mold;

[0033] Figure 6 This is a cross-sectional view of the injection molding robot of the present invention implanting a nut into an injection mold;

[0034] Figure 7 This is a schematic diagram of an injection molding robot grasping a nut according to Example 2 of the present invention;

[0035] Figure 8 2 is a schematic diagram of the connection structure of the limiting plate of Example 2 of the present invention;

[0036] In the figure: 1. nut carrier, 2. nut, 3. injection molding robot, 4. grabbing rod, 5. positioning column, 6. positioning hole, 7. negative pressure adsorption groove, 8. negative pressure chamber, 9. guide surface, 10. avoidance groove, 11. positioning sleeve rod, 12. support platform, 13. positioning groove, 14. nut insert rod, 15. socket, 16. step surface, 17. limit plate, 18. support, 19. limit hole, 20. limit rod, 21. push rod, 22. push block, 23. push surface, 24. positioning spring, 25. mounting groove, 26. hinge plate, 27. positioning protrusion, 28. abutment block, 29. injection mold. DETAILED DESCRIPTION

[0037] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0038] Example 1: A device for inserting a nut into an injection mold (see attached Figure 1 To the attached Figure 6 ),include:

[0039] Nut carrier 1, nut 2 is loaded on the nut carrier; the nut carrier can move along the guide rail, the nut carrier completes the loading of nuts at the loading station, and then moves along the guide rail to the grabbing station to grab the nuts;

[0040] Injection molding robot 3, the injection molding robot is provided with a grabbing rod 4 corresponding to the nut, the grabbing rod realizes grabbing of the nut on the nut carrier and implanting the nut into the injection mold;

[0041] At least two positioning assemblies are positioned between the nut carrier and the injection molding robot. In this embodiment, two positioning assemblies are provided. The positioning assemblies include positioning posts 5 and positioning holes 6. The positioning posts fit into the positioning holes to achieve positioning between the nut carrier and the injection molding robot. The upper portion of the positioning holes is a frustum-shaped structure with a larger top and a smaller bottom, while the lower portion of the positioning posts is a frustum-shaped structure with a larger top and a smaller bottom. The positioning posts are mounted on the injection molding robot, and the positioning holes are mounted on the nut carrier.

[0042] A negative pressure adsorption groove 7 is provided on the end face of the grabbing rod, through which a negative pressure adsorption nut is passed. An annular negative pressure chamber 8 is provided on the bottom surface of the negative pressure adsorption groove, which is connected to an air pump via a pipe. The side walls of the negative pressure adsorption groove are inclined to form a guide surface 9, which slopes inward from the open end of the negative pressure adsorption groove to the bottom. During the process of the nut being adsorbed into the negative pressure adsorption groove, the outer edge of the nut slides along the guide surface. An avoidance groove 10 is provided on the bottom surface of the negative pressure adsorption groove. A plurality of positioning sleeves 11 are provided on the nut carrier. The upper end of the positioning sleeves has a conical structure. The nut is positioned on the positioning sleeves. The positioning sleeves and the nut are arranged in a one-to-one correspondence. A support platform 12 is provided on the nut carrier, and a positioning groove 13 is provided on the support platform. The nut is loaded in the support groove, and the positioning sleeve extends upward out of the support platform. The grabbing rod moves toward the nut carrier, and the nut is guided along the guide surface on the negative pressure adsorption groove and slides into the negative pressure adsorption groove. The nut is adsorbed by negative pressure, and the nut is flexibly corrected in this process.

[0043] The injection mold 29 is equipped with a nut insert 14 corresponding to the nut. A socket 15 is provided on the outside of the nut insert, into which a gripping rod can be inserted. The end of the nut insert is tapered and provided with a stepped surface 16, which the injection molding robot uses to insert the nut onto the nut insert. The stepped surface provides reliable support and positioning for the nut. During the insertion of the nut into the injection mold, a relief groove accommodates the end of the nut insert, preventing interference.

[0044] During operation, the nut is first loaded onto the nut carrier, and then the injection molding robot grabs the nut on the nut carrier, grabs the nut through the grabbing rod, and finally transfers it to the injection mold position and implants it into the injection mold. A positioning assembly is installed between the nut carrier and the injection molding robot. The positioning holes and positioning columns of the positioning assembly realize the positioning of the two to prevent deviation in their positions. Moreover, before work, when the injection molding robot performs grasping and positioning, the positioning column and the positioning hole are completely aligned and inserted into place by moving the X-axis, Y-axis, and Z-axis to determine precise positioning, which makes positioning convenient. In the process of the injection molding robot implanting the nut into the injection mold, the nut is fitted onto the nut insert rod, and the positioning is accurate and reliable. The step surface on the nut insert rod plays a positioning role for the nut. The end of the nut insert rod has a conical structure, which facilitates the insertion of the nut, so that the nut can be accurately implanted into the mold without collision.

[0045] Example 2: A device for inserting a nut into an injection mold (see attached Figure 7 , Attachment Figure 8 ), its structure is similar to that of Example 1, the main difference being that in this embodiment, a limit plate 17 for horizontal movement is installed on the nut carrier, and supports 18 are provided at corresponding positions at both ends of the limit plate on the nut carrier, and sliding holes are provided on the supports. The two ends of the limit plate are respectively slidably inserted in the two sliding holes, and limit holes 19 are provided on the limit plate and the positioning sleeve rod correspondingly. The limit hole is a truncated cone-shaped structure with a larger upper part and a smaller lower part. The positioning sleeve rod passes through the limit hole, and the nut is placed between the limit hole and the positioning sleeve rod; a limit rod 20 is installed on the injection molding robot, and a push rod 21 is installed on the limit plate. The end of the push rod is hinged to a push block 22, and the end face of the push block is provided with an inclined push surface 23, and a positioning spring 24 is installed between the limit plate and the nut carrier; a mounting groove 25 is provided on a support, the lower part of the push rod is placed in the mounting groove, the positioning spring is placed in the mounting groove, the positioning spring abuts on the push rod, and the push rod abuts on the side wall of the mounting groove. The push rod is provided with a hinge plate 26, to which the push block is hinged. A positioning protrusion 27 is provided on the push block, and an outwardly protruding abutment block 28 is provided on the push rod. A positioning torsion spring is installed between the push block and the hinge plate, and the lower end surface of the positioning protrusion abuts the abutment block. As the injection molding robot moves toward the nut carrier, the limit rod presses against the push block, driving the push block to rotate and allowing the limit rod to slide over the push block. As the injection molding robot moves away from the nut carrier, the limit rod can press against the push surface, thereby driving the limit plate to move.

[0046] When the injection molding robot grabs the nut, it first approaches the nut carrier. During this process, the limit rod hits the push block, driving the push block to rotate and causing the limit rod to slide over the push block. At this time, the push block will not hinder the limit rod. After the grabbing rod on the injection molding robot grabs the nut, the injection molding robot moves away from the nut carrier. During this process, the limit rod can hit the push surface. At this time, if any nut on the nut carrier is not grabbed by the grabbing rod, the nut that is not grabbed will hinder the movement of the limit plate, that is, the limit plate will not be pushed, the end of the limit rod will be stuck on the push surface, and the injection molding robot cannot move upward; only when all the nuts on the nut carrier are grabbed, the end of the limit rod will abut on the push surface, pushing the limit plate to move, so that the limit rod can slide away from the push surface, realizing the smooth movement of the injection molding robot. This structural setting can ensure that all nuts can be implanted in the injection mold at one time, avoiding omissions.

[0047] The above-described embodiments are only preferred solutions of the present invention and are not intended to limit the present invention in any form. Other variations and modifications are possible without exceeding the technical solutions described in the claims.

Claims

1. A nut implanting device for an injection mold, characterized in that: include: A nut carrier, on which nuts are loaded; Injection molding robot, the injection molding robot is provided with a grabbing rod corresponding to the nut, the grabbing rod realizes grabbing of the nut on the nut carrier and implanting the nut into the injection mold; At least two positioning components are provided between the nut carrier and the injection molding robot. The positioning components include positioning columns and positioning holes. The positioning columns are adapted to be inserted into the positioning holes to realize the positioning of the nut carrier and the injection molding robot. A number of positioning sleeves are provided on the nut carrier, and the nut is sleeved on the positioning sleeves for positioning. A laterally movable limit plate is installed on the nut carrier, and a limit hole is provided on the limit plate. The positioning sleeve passes through the limit hole, and the nut is placed between the limit hole and the positioning sleeve; a limit rod is installed on the injection molding robot, and a push rod is installed on the limit plate. The end of the push rod is hinged to a push block, and an inclined push surface is provided on the end face of the push block, and a positioning spring is installed between the limit plate and the nut carrier; the injection molding robot moves the limit rod close to the nut carrier to push the push block, driving the push block to rotate so that the limit rod slides over the push block; the injection molding robot moves the limit rod away from the nut carrier to push the push surface, thereby pushing the limit plate to move.

2. The device for inserting a nut into an injection mold according to claim 1, wherein: A negative pressure adsorption groove is provided on the end surface of the grabbing rod, and the negative pressure adsorption groove passes through the negative pressure adsorption nut.

3. The injection mold nut implanting device according to claim 2, characterized in that: The side wall of the negative pressure adsorption tank is tilted to form a guide surface. When the nut is adsorbed into the negative pressure adsorption tank, the outer edge of the nut slides along the guide surface.

4. The injection mold nut implanting device according to claim 1, characterized in that: An avoidance groove is provided on the bottom surface of the negative pressure adsorption tank.

5. The device for inserting a nut into an injection mold according to claim 1, wherein: The upper end of the positioning sleeve rod is in a tapered structure.

6. The device for inserting a nut into an injection mold according to claim 1, wherein: A support platform is provided on the nut carrier, a positioning groove is provided on the support platform, and the nut is loaded in the support groove.

7. The device for inserting a nut into an injection mold according to claim 1, wherein: The upper portion of the positioning hole is in a frustum-shaped structure that is larger at the top and smaller at the bottom, and the lower portion of the positioning column is in a frustum-shaped structure that is larger at the top and smaller at the bottom.

8. The injection mold nut implanting device according to any one of claims 1 to 7, characterized in that: A nut inserting rod is arranged on the injection mold corresponding to the nut, the end of the nut inserting rod is a tapered structure, a step surface is arranged on the nut inserting rod, and the injection molding robot implants the nut on the nut inserting rod.

9. The device for inserting a nut into an injection mold according to claim 1, wherein: A hinge plate is provided on the push rod, the push block is hinged on the hinge plate, a positioning protrusion is provided on the push block, an outwardly protruding abutting block is provided on the push rod, a positioning torsion spring is installed between the push block and the hinge plate, and the lower end surface of the positioning protrusion abuts on the abutting block.

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