A special-shaped blind hole nut automatic implantation in-mold injection molding production line and its implementation method

Abstract

The present invention discloses an automatic in-mold injection molding production line for special-shaped blind hole nuts and its implementation method, comprising a nut positioning bolt automatic screwing device, a manipulator, a mold, and a positioning bolt automatic screwing device which are arranged in sequence; the nut positioning bolt automatic screwing device automatically screws the nut and the positioning bolt together to form a nut positioning bolt integrated part, the manipulator is used to grab the nut positioning bolt integrated part and insert it into the corresponding hole position of the mold, and the positioning bolt automatic screwing device automatically rotates and removes the positioning bolt in the plastic part after injection molding. The present invention realizes the fully automatic in-mold injection molding production of special-shaped blind hole nuts, reduces the labor force, and meets the mass production needs of enterprises.

Description

Technical Field

[0001] The invention relates to the technical field of nut in-mold injection molding, and in particular to an in-mold injection molding production line for automatic implantation of special-shaped blind hole nuts and a realization method thereof. Background Art

[0002] In injection molding production, it is sometimes necessary to implant nuts in plastic parts. For standard cylindrical nuts, the nut can be placed on the positioning column of the fixed platform first, and then the sleeve on the robot moves down to take the nut, and the metal ball at the side opening of the sleeve is used to clamp the nut. Since the metal ball is wrapped with an elastic rubber ring, the nut can be fixed in the specified position inside the sleeve. The robot automatically moves to the specified position inside the mold, and the ejector in the sleeve ejects the nut onto the fixed column of the mold. After the mold is closed, the nut is automatically implanted in the mold for injection molding.

[0003] However, for special-shaped blind hole nuts, such as T-shaped blind hole nuts with one end sealed (such as the attached Figure 1 As shown), it is impossible to realize automatic implantation of the nut by in-mold injection molding according to the above method. This is because, on the one hand, the blind hole nut cannot be placed on the positioning column of the fixed platform, and on the other hand, the special-shaped nut is difficult to be accurately positioned inside the sleeve.

[0004] The existing implementation method is to first manually screw the special-shaped blind hole nut and the positioning bolt together to form a nut positioning bolt integrated part, and then the robot automatically grabs the nut positioning bolt integrated part and inserts it into the corresponding hole position of the mold, closes the mold to complete the in-mold injection molding, opens the mold to take out the injection molded part, and then manually rotates the positioning bolt to take it out. This manual screwing and rotating operation to take out the positioning bolt has a low degree of automation, which not only increases the amount of labor, but also increases the labor intensity of the operators. For large-scale production in factories, it is urgent to develop an automatic in-mold injection molding production line for special-shaped blind hole nuts and its implementation method. Summary of the invention

[0005] The purpose of the present invention is to design an automatic in-mold injection molding production line for special-shaped blind hole nuts and an implementation method thereof, so as to realize the fully automatic in-mold injection molding production of special-shaped blind hole nuts, reduce the labor consumption, and meet the mass production needs of enterprises.

[0006] To achieve the above-mentioned purpose, the present invention claims protection for an automatic in-mold injection molding production line for special-shaped blind hole nuts, comprising a nut locating bolt automatic tightening device, a manipulator, a mold and a locating bolt automatic unscrewing device arranged in sequence; the nut locating bolt automatic tightening device automatically screws the nut and the locating bolt together to form a nut locating bolt integrated part, the manipulator is used to grab the nut locating bolt integrated part and insert it into the corresponding hole position of the mold, and the locating bolt automatic unscrewing device automatically rotates the locating bolt in the plastic part after injection molding is completed.

[0007] The automatic tightening device for tightening the nut and the positioning bolt comprises a first base, on which a nut feeding mechanism, a positioning bolt feeding mechanism, a rotating tightening mechanism, a fixed transportation mechanism and an assembly platform are provided; the assembly platform is provided with a nut limiting groove and a positioning bolt limiting groove for limiting the nut and the positioning bolt respectively, one side of the assembly platform is drivingly connected to a first driving device, and under the driving action of the first driving device, the assembly platform slides between a first position and a second position of the first base; when the assembly platform is at the first position, The discharge ports of the nut feeding mechanism and the positioning bolt feeding mechanism are respectively aligned with the nut limiting groove and the positioning bolt limiting groove; when the assembly platform is located at the second position, the rotating screwing mechanism and the nut limiting groove and the positioning bolt limiting groove are located on the same straight line, and the fixed transportation mechanism is located above the nut limiting groove and the positioning bolt limiting groove, so that the rotating screwing mechanism can limit and fix the nut during the screwing and assembly process of the positioning bolt and the nut, and transport the screwed and assembled nut and positioning bolt integrated part to the first collection box.

[0008] Furthermore, the nut feeding mechanism is a first automatic feeding vibration plate, and the positioning bolt feeding mechanism is a second automatic feeding vibration plate. In this way, the nuts and positioning bolts are transported to the nut limiting groove and the positioning bolt limiting groove according to a predetermined arrangement by using the first automatic feeding vibration plate and the second automatic feeding vibration plate, specifically, the threaded end of the nut is aligned with the threaded mating end of the positioning bolt, so as to ensure the smooth progress of subsequent assembly work.

[0009] Furthermore, the rotary screwing mechanism includes a first rotary motor and a first screwdriver, the first rotary motor is fixedly connected to the first movable plate, the first movable plate is slidably connected to the first base via a second driving device, the driving end of the first rotary motor is connected to the first screwdriver, and the assembly platform is provided with a first through hole for the first screwdriver to enter and exit. With this arrangement, the first screwdriver is placed close to the positioning bolt, and the positioning bolt is twisted by the first screwdriver so that the positioning bolt and the nut thread are matched, and the structure is simple and practical.

[0010] Further, the fixed transport mechanism comprises a second movable plate, a third driving device, a first clamping block and a second clamping block, the third driving device is fixedly connected to the second movable plate, the driving end of the third driving device is connected to the first clamping block and / or the second clamping block, the surface of the assembly platform is provided with a sliding groove for the first clamping block and the second clamping block to slide, the sliding groove is located on the left and right sides of the positioning bolt limiting groove and / or the nut limiting groove; the first clamping block and the second clamping block clamp the nut positioning bolt integrated part through the third driving device; the second movable plate is transported to the top of the first collection box along the track through the fourth driving device. In this way, the third driving device is first used to make the first clamping block and the second clamping block cooperate to clamp the nut positioning bolt integrated part, and then the fourth driving device is used to move the second movable plate to the top of the first collection box, and then the third driving device is used to release the clamping effect of the first clamping block and the second clamping block on the nut positioning bolt integrated part, so that the nut positioning bolt falls into the first collection box, and the structure is simple and practical. In addition, the sliding groove ensures that the first clamping block and the second clamping block can clamp the left and right sides of the nut positioning bolt integrated part, thereby effectively clamping and carrying the nut positioning bolt integrated part.

[0011] Furthermore, a first limiting mechanism, a second limiting mechanism and a third limiting mechanism are provided;

[0012] The first limiting mechanism and the second limiting mechanism are fixedly connected to the first base, and the first limiting mechanism and the second limiting mechanism are respectively located at the left and right sides of the assembly platform when the assembly platform is in the second position;

[0013] The first limiting mechanism includes a fifth driving device and a push rod, the driving end of the fifth driving device is connected to the push rod, and the push rod moves away from / closer to the end of the nut away from the positioning bolt through the fifth driving device, and a second through hole for the push rod to enter and exit is opened on the assembly platform; the push rod of the first limiting mechanism is used to abut against the non-threaded end of the nut, and when the first screwdriver slides to the left to squeeze the positioning bolt, the nut is prevented from moving in the opposite direction of the first screwdriver.

[0014] The second limiting mechanism includes a pressure plate and a pressure plate seat, the pressure plate and the pressure plate seat are fixedly connected in an L shape, the pressure plate is located above the limiting groove of the positioning bolt, and the pressure plate seat is provided with a third through hole for the first screwdriver to enter and exit; the pressure plate of the second limiting mechanism is used to limit the upper part of the positioning bolt to prevent the positioning bolt from tilting upward during the rotational connection.

[0015] The third limiting mechanism includes a limiting plate, the limiting plate is fixedly connected to the second movable plate, the second movable plate moves up and down along the track through the fourth driving device, and the limiting plate is located directly above the nut limiting groove. The limiting block of the third limiting mechanism is used to press and fix the nut from above to ensure that the nut will not rotate with the positioning bolt during the rotation and matching process, thereby ensuring the effective threaded connection between the positioning bolt and the nut.

[0016] The first limiting mechanism, the second limiting mechanism and the third limiting mechanism ensure effective threaded cooperation between the positioning bolt and the nut.

[0017] Furthermore, a contact sensor is provided at the end of the sliding motion path of the assembly platform, and the contact sensor is electrically connected to the first drive device. In this way, the sliding position of the assembly platform is detected by the contact sensor and the first drive device is controlled in time to ensure that the assembly platform can accurately slide to the first position and the second position.

[0018] Wherein, the automatic screw-out device of the positioning bolt comprises a second base, and a clamping mechanism and a plastic part placement table are arranged above the second base; a fixed bracket, a lifting seat, a rotating removal mechanism and a positioning bolt collecting mechanism are arranged below the second base; the clamping mechanism comprises a rotary clamping cylinder and a clamping rod, and the output end of the rotary clamping cylinder is connected to the clamping rod; the plastic part placement table is located on one side of the clamping mechanism, and the plastic part placement table is embedded on the second base, the upper surface of the plastic part placement table cooperates with the plastic part, and the plastic part placement table is provided with a fourth through hole for the positioning bolt to pass through; a lifting cylinder is fixedly connected to the fixed bracket through a fixing plate, and the output end of the lifting cylinder is connected to the lifting plate, and the lifting plate and the lifting seat are fixed by the lifting rod The rotary take-out mechanism is fixedly connected with the lifting seat, and under the driving action of the lifting cylinder, the rotary take-out mechanism moves up and down; the rotary take-out mechanism includes a second rotary motor and a second screwdriver, and the driving end of the second rotary motor is connected to the second screwdriver; the positioning bolt collecting mechanism is fixedly connected with the second base, and the positioning bolt collecting mechanism includes a first collecting plate and a second collecting box, the first collecting plate is inclined, and a fifth through hole is opened on the first collecting plate, the second screwdriver, the fifth through hole and the fourth through hole are aligned in sequence, and the hole diameter of the fifth through hole is larger than the diameter of the second screwdriver and smaller than the diameter of the positioning bolt; the second collection box is located at the inclined lower end of the first collecting plate.

[0019] Furthermore, a guide seat is fixedly provided on the fixed bracket, and the guide seat is located between the lifting plate and the second base; the guide seat includes a guide block and a guide plate, and the lifting seat is provided with a guide rail matched with the guide block, and the guide rail is vertically arranged, and the guide rail is connected with the guide block for sliding up and down; the guide plate is provided with a sixth through hole for the lifting rod to pass through, and a spring is sleeved on the outer side of the lifting rod, and the spring is located between the lifting seat and the guide plate. In this arrangement, the vertical guide rail is used to ensure that the lifting seat maintains verticality during the up and down lifting process. At the same time, a spring is added between the lifting seat and the guide plate, and the elastic force of the spring is used to ensure that the lifting seat is quickly reset.

[0020] Furthermore, the clamping mechanism, the plastic part placement table, the rotating removal mechanism, the lifting seat, the guide seat, and the positioning bolt collection mechanism are provided in a plurality of corresponding and symmetrical configurations. In this configuration, by correspondingly configuring a plurality of positioning bolts, the automatic rotation out operation of the positioning bolts of multiple plastic parts can be completed at one time, thereby improving work efficiency.

[0021] Furthermore, the positioning bolt collection mechanism is also provided with a second collection plate, which is located between the first collection plate and the second collection box; the second collection plate is tilted, and the tilted upper end of the second collection plate is aligned with the tilted lower ends of the first collection plates, and the tilted lower end of the second collection plate is aligned with the second collection box; the second collection plate is provided with a seventh through hole for the second rotary motor to pass through. In this way, the second collection plate collects a number of positioning bolts that fall from the first collection plate at one time, and guides them to slide into the second collection box at one time, so as to facilitate the recovery of the positioning bolts. At the same time, the seventh through hole is provided for the second rotary motor to pass through when it is lifted up and down, so as to facilitate the second screwdriver to rotate and remove the positioning bolts.

[0022] Furthermore, a vertical guide column is provided between the fixed plate and the second base, and the lifting plate passes through the guide column and is slidably connected with the guide column up and down. With such a configuration, the vertical guide column ensures that the lifting seat maintains verticality during the lifting process.

[0023] The present invention also claims a method for automatically implanting special-shaped blind hole nuts into a mold injection molding production line, comprising the following steps:

[0024] Step 1: Use a nut and positioning bolt automatic tightening device to automatically tighten the nut and the positioning bolt to form a nut and positioning bolt integrated part;

[0025] Step 2: Grab the nut and positioning bolt integrated part of step 1 by the robot and insert it into the corresponding hole of the mold;

[0026] Step 3: performing injection molding operation on the mold into which the nut positioning bolt integrated part has been inserted in step 2, and obtaining a plastic part after the mold is opened;

[0027] Step 4: placing the plastic part in step 3 in a positioning bolt automatic screwing-out device, and using the positioning bolt automatic screwing-out device to automatically rotate and remove the positioning bolt in the plastic part to obtain a plastic part with a special-shaped nut implanted therein.

[0028] Compared with the prior art, the present invention has the following beneficial effects:

[0029] In the existing process of implanting special blind hole nuts in molds, an automatic screwing device for nut positioning bolts and an automatic screwing device for positioning bolts are added. The automatic screwing device for nut positioning bolts is used to automatically screw the nut and the positioning bolt together to form a nut positioning bolt integrated part. The automatic screwing device for positioning bolts is used to automatically rotate and remove the positioning bolts in the plastic part after injection molding. This realizes the fully automatic implantation and injection molding production of special-shaped blind hole nuts, reduces the labor force, and meets the mass production needs of enterprises. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 This is a working principle diagram of the special-shaped nut implanted into the plastic part of the present invention;

[0032] Figure 2 It is an overall stereoscopic diagram of the automatic screwing device for nut positioning bolts of the present invention;

[0033] Figure 3 This is a partial stereoscopic view of the automatic screwing device for nut positioning bolts of the present invention (the fixed transport mechanism is hidden);

[0034] Figure 4 The appended Figure 3 A local enlarged view of the Z position;

[0035] Figure 5 It is a top view of the automatic tightening device for nut positioning bolt of the present invention;

[0036] Figure 6 The appended Figure 5 A local enlarged view of the Y position;

[0037] Figure 7The second partial stereoscopic view of the nut positioning bolt automatic tightening device of the present invention (the nut feeding mechanism and the positioning bolt feeding mechanism are hidden);

[0038] Figure 8 The appended Figure 7 A local enlarged view of point X;

[0039] Fig. 9 It is a structural schematic diagram of the automatic tightening device for nut positioning bolts of the present invention when the assembly platform is located at the second position;

[0040] Fig.10 It is an overall stereogram of the automatic screw-out device for the positioning bolt of the present invention;

[0041] Fig.11 The appended Fig.10 A local enlarged view of the W position;

[0042] Fig.12 It is a front view of the automatic screw-out device for the positioning bolt of the present invention;

[0043] Fig.13 It is a structural schematic diagram of the automatic screw-out device for the positioning bolt of the present invention;

[0044] The names of the components marked in the figure are as follows:

[0045] A1, nut; A2, positioning bolt; A3, plastic part; A4, nut and positioning bolt integrated part;

[0046] B1, first base; B2, nut feeding mechanism; B3, positioning bolt feeding mechanism; B4, rotating screwing mechanism; B401, first rotating motor; B402, first screwdriver; B403, first movable plate; B404, second driving device; B5, fixed transportation mechanism; B501, second movable plate; B502, third driving device; B503, first clamping block; B504, second clamping block; B505, fourth driving device; B506, track; B6, assembly platform; B601, nut limiting groove; B602, positioning bolt limiting groove; B603, first through hole; B604, second through hole; B605, sliding groove; B7, first driving device; B701, contact sensor; B8, first collecting box; B9, first limiting mechanism; B901, fifth driving device; B 902, ejector rod; B10, second limiting mechanism; B1001, pressing plate; B1002, pressing plate seat; B1003, third through hole; B11, third limiting mechanism; B1101, limiting plate;

[0047] C1, second base; C2, clamping mechanism; C201, rotary clamping cylinder; C202, clamping rod; C3, plastic parts placing table; C301, fourth through hole; C4, fixed bracket; C401, fixed plate; C5, lifting cylinder; C501, lifting plate; C6, lifting seat; C601, lifting rod; C602, guide rail; C603, spring; C7, rotary removal mechanism; C701, second rotary motor; C702, second screwdriver; C8, positioning bolt collection mechanism; C801, first collection plate; C8011, fifth through hole; C802, second collection box; C803, second collection plate; C8031, seventh through hole; C9, guide seat; C901, guide block; C902, guide plate; C 9021, sixth through hole; C 10, guide column DETAILED DESCRIPTION

[0048] The following will be combined with the accompanying drawings in the present invention to clearly and completely describe the technical solutions in the present invention. Obviously, what is described is only a part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0049] Example:

[0050] A production line for automatic in-mold injection molding of special-shaped blind hole nuts, comprising a nut positioning bolt automatic screwing device, a manipulator, a mold, and a positioning bolt automatic screwing device arranged in sequence; the nut positioning bolt automatic screwing device automatically screws the nut A1 and the positioning bolt A2 together to form a nut positioning bolt integrated part A4, the manipulator is used to grab the nut positioning bolt integrated part A4 and insert it into the corresponding hole position of the mold, and the positioning bolt automatic screwing device automatically rotates and removes the positioning bolt A2 in the plastic part A3 after injection molding. The manipulator and the mold are both existing designs, so this application does not describe their structural shapes in detail.

[0051] Among them, the nut positioning bolt automatic tightening device includes a first base B1, on which a nut feeding mechanism B2, a positioning bolt feeding mechanism B3, a rotating tightening mechanism B4, a fixed transportation mechanism B5 and an assembly platform B6 are provided; the assembly platform B6 is provided with a nut limiting groove B601 and a positioning bolt limiting groove B602 for limiting the nut A1 and the positioning bolt A2 respectively, one side of the assembly platform B6 is connected to the first driving device B7, and under the driving action of the first driving device B7, the assembly platform B6 slides between the first position and the second position of the first base B1; when the assembly platform B6 is in the first position When the nut is in the first position, the discharge ports of the nut feeding mechanism B2 and the positioning bolt feeding mechanism B3 are aligned with the nut limiting groove B601 and the positioning bolt limiting groove B602 respectively; when the assembly platform B6 is in the second position, the rotating screwing mechanism B4 and the nut limiting groove B601 and the positioning bolt limiting groove B602 are located on the same straight line, and the fixed transportation mechanism B5 is located above the nut limiting groove B601 and the positioning bolt limiting groove B602, so that the rotating screwing mechanism B4 can limit and fix the nut A1 during the screwing and assembly process of the positioning bolt A2 and the nut A1, and transport the screwed and assembled nut positioning bolt integrated part A4 to the first collection box B8.

[0052] The nut feeding mechanism B2 is the first automatic feeding vibration plate, and the positioning bolt feeding mechanism B3 is the second automatic feeding vibration plate. In this way, the first automatic feeding vibration plate and the second automatic feeding vibration plate are used to transport the nuts and positioning bolts to the nut limiting groove B601 and the positioning bolt limiting groove B602 according to the predetermined arrangement, specifically, the threaded end of the nut is aligned with the threaded mating end of the positioning bolt, ensuring the smooth progress of the subsequent assembly work.

[0053] The rotating screwing mechanism B4 includes a first rotating motor B401 and a first screwdriver B402. The first rotating motor B401 is fixedly connected to the first movable plate B403. The first movable plate B403 is connected to the first base B1 by sliding left and right through the second driving device B404. The driving end of the first rotating motor B401 is connected to the first screwdriver B402. The assembly platform B6 is provided with a first through hole B603 for the first screwdriver B402 to enter and exit. With this arrangement, the first screwdriver B402 is close to the positioning bolt A2, and the positioning bolt A2 is twisted by the first screwdriver B402, so that the positioning bolt A2 is threadedly matched with the nut A1. The structure is simple and practical.

[0054] The fixed transport mechanism B5 includes a second movable plate B501, a third driving device B502, a first clamp B503 and a second clamp B504. The third driving device B502 is fixedly connected to the second movable plate B501. The driving end of the third driving device B502 is connected to the first clamp B503 and / or the second clamp B504. The surface of the assembly platform B6 is provided with a sliding groove B605 for the first clamp B503 and the second clamp B504 to slide. The sliding groove B605 is located on the left and right sides of the positioning bolt limiting groove B602 and / or the nut limiting groove B601; the first clamp B503 and the second clamp B504 clamp the nut positioning bolt integrated part A4 through the third driving device B502; the second movable plate B501 is transported to the top of the first collection box B8 along the track B506 through the fourth driving device B505. In this arrangement, the third driving device B502 is first used to make the first clamping block B503 and the second clamping block B504 cooperate to clamp the nut positioning bolt integrated part A4, and then the fourth driving device B505 is used to move the second movable plate B501 to the top of the first collection box B8, and then the third driving device B502 is used to release the clamping effect of the first clamping block B503 and the second clamping block B504 on the nut positioning bolt integrated part A4, so that the nut positioning bolt integrated part A4 falls into the first collection box B8, and the structure is simple and practical. In addition, the sliding groove B605 ensures that the first clamping block B503 and the second clamping block B504 can clamp the left and right sides of the nut positioning bolt integrated part A4, so as to effectively clamp and carry the nut positioning bolt integrated part A4.

[0055] A first limiting mechanism B9, a second limiting mechanism B10 and a third limiting mechanism B11 are also provided;

[0056] The first limiting mechanism B9 and the second limiting mechanism B10 are fixedly connected to the first base B1, and the first limiting mechanism B9 and the second limiting mechanism B10 are respectively located on the left and right sides when the assembly platform B6 is in the second position;

[0057] The first limiting mechanism B9 includes a fifth driving device B901 and a push rod B902. The driving end of the fifth driving device B901 is connected to the push rod B902. The push rod B902 moves away from / closer to the end of the nut A1 away from the positioning bolt A2 through the fifth driving device B901. A second through hole B604 for the push rod B902 to enter and exit is opened on the assembly platform B6. The push rod B902 of the first limiting mechanism B9 is used to abut against the non-threaded end of the nut A1. When the first screwdriver B402 slides to the left to squeeze the positioning bolt A2, the nut A1 is prevented from moving in the opposite direction of the first screwdriver B402.

[0058] The second limiting mechanism B10 includes a pressure plate B1001 and a pressure plate seat B1002. The pressure plate B1001 and the pressure plate seat B1002 are fixedly connected in an L shape. The pressure plate B1001 is located above the positioning bolt limiting groove B602. The pressure plate seat B1002 is provided with a third through hole B1003 for the first screwdriver B402 to enter and exit. The pressure plate B1001 of the second limiting mechanism B10 is used to limit the upper part of the positioning bolt to prevent the positioning bolt from tilting upward during the rotation connection.

[0059] The third limiting mechanism B11 includes a limiting plate B1101, which is fixedly connected to the second movable plate B501. The second movable plate B501 moves up and down along the track B506 through the fourth driving device B505, and the limiting plate B1101 is located directly above the nut limiting groove B601. The limiting block of the third limiting mechanism B11 is used to press and fix the nut A1 from above to ensure that the nut A1 will not rotate with the positioning bolt A2 during the rotation and matching process, thereby ensuring the effective threaded connection between the positioning bolt A2 and the nut A1.

[0060] The first limiting mechanism B9, the second limiting mechanism B10 and the third limiting mechanism B11 ensure effective threaded cooperation between the positioning bolt A2 and the nut A1.

[0061] A contact sensor B701 is provided at the end of the sliding motion path of the assembly platform B6, and the contact sensor B701 is electrically connected to the first drive device B7. In this way, the sliding position of the assembly platform B6 is detected by the contact sensor B701 and the first drive device B7 is controlled in time to ensure that the assembly platform B6 can accurately slide to the first position and the second position.

[0062] Among them, the automatic screw-out device for the positioning bolt includes a second base C1, and a clamping mechanism C2 and a plastic part placement table C3 are provided above the second base C1; a fixed bracket C4, a lifting seat C6, a rotating removal mechanism C7 and a positioning bolt collecting mechanism C8 are provided below the second base C1; the clamping mechanism C2 includes a rotary clamping cylinder C201 and a clamping rod C202, and the output end of the rotary clamping cylinder C201 is connected to the clamping rod C202; the plastic part placement table C3 is located on one side of the clamping mechanism C2, and the plastic part placement table C3 is embedded on the second base C1, the upper surface of the plastic part placement table C3 cooperates with the plastic part A3, and the plastic part placement table C3 is provided with a fourth through hole C301 for the positioning bolt A2 to pass through; a lifting cylinder C5 is fixedly connected to the fixed bracket C4 through a fixed plate C401, and the output end of the lifting cylinder C5 is connected to the lifting plate C501, and the lifting plate C501 and the lifting seat C6 are connected through the lifting rod C601 The rotary take-out mechanism C7 is fixedly connected with the lifting seat C6, and the rotary take-out mechanism C7 moves up and down under the driving action of the lifting cylinder C5; the rotary take-out mechanism C7 includes a second rotary motor C701 and a second screwdriver C702, and the driving end of the second rotary motor C701 is connected to the second screwdriver C702; the positioning bolt collecting mechanism C8 is fixedly connected with the second base C1, and the positioning bolt collecting mechanism C8 includes a first collecting plate C801 and a second collecting box C802, the first collecting plate C801 is inclined, and a fifth through hole C8011 is opened on the first collecting plate C801, the second screwdriver C702, the fifth through hole C8011 and the fourth through hole C301 are aligned in sequence, and the hole diameter of the fifth through hole C8011 is larger than the diameter of the second screwdriver C702 and smaller than the diameter of the positioning bolt; the second collection box C802 is located at the inclined lower end of the first collecting plate C801.

[0063] A guide seat C9 is also fixed on the fixed bracket C4, and the guide seat C9 is located between the lifting plate C501 and the second base C1; the guide seat C9 includes a guide block C901 and a guide plate C902, and the lifting seat C6 is provided with a guide rail C602 that matches the guide block C901, and the guide rail C602 is vertically arranged, and the guide rail C602 is connected to the guide block C901 for sliding up and down; the guide plate C902 is provided with a sixth through hole C9021 for the lifting rod C601 to pass through, and the outer side of the lifting rod C601 is sleeved with a spring C603, and the spring C603 is located between the lifting seat C6 and the guide plate C902. In this arrangement, the vertical guide rail C602 is used to ensure that the lifting seat C6 maintains verticality during the up and down lifting process. At the same time, a spring C603 is added between the lifting seat C6 and the guide plate C902, and the elastic force of the spring C603 is used to ensure that the lifting seat C6 is quickly reset.

[0064] The clamping mechanism C2, the plastic part placement table C3, the rotating removal mechanism C7, the lifting seat C6, the guide seat C9, and the positioning bolt collection mechanism C8 are provided in a number of corresponding and symmetrical arrangements. In this way, by correspondingly arranging a number of them, the positioning bolts of multiple plastic parts can be automatically rotated out at one time, thereby improving work efficiency.

[0065] The positioning bolt collection mechanism C8 is also provided with a second collection plate C803, which is located between the first collection plate C801 and the second collection box C802; the second collection plate C803 is tilted, and the tilted upper end of the second collection plate C803 is aligned with the tilted lower ends of the first collection plates C801, and the tilted lower end of the second collection plate C803 is aligned with the second collection box C802; the second collection plate C803 is provided with a seventh through hole C8031 for the second rotary motor C701 to pass through. In this way, the second collection plate C803 collects a number of positioning bolts that fall from the first collection plate C801 at one time, and guides them to slide into the second collection box C802 at one time, so as to facilitate the recovery of the positioning bolts A2. At the same time, the seventh through hole C8031 is provided for the second rotary motor C701 to pass through when it is raised and lowered, so as to facilitate the second screwdriver C702 to rotate and remove the positioning bolts A2.

[0066] A vertical guide post C10 is provided between the fixed plate C401 and the second base C1, and the lifting plate C501 passes through the guide post C10 and is slidably connected with the guide post C10 up and down. In this way, the vertical guide post C10 ensures that the lifting seat C6 maintains verticality during the lifting process.

[0067] The working principle of this embodiment:

[0068] Step 1: Use a nut and positioning bolt automatic tightening device to automatically tighten the nut A1 and the positioning bolt A2 to form a nut and positioning bolt integrated part A4;

[0069] Step 2: Grab the nut positioning bolt integrated part A4 in step 1 by a robot and insert it into the corresponding hole of the mold;

[0070] Step 3: Injection molding is performed on the mold into which the nut positioning bolt integrated part A4 has been inserted in step 2, and a plastic part A3 is obtained after the mold is opened;

[0071] Step 4: Place the plastic part A3 in step 3 in the automatic screw-out device for positioning bolts mechanically or manually, and use the automatic screw-out device for positioning bolts to automatically rotate and remove the positioning bolts A2 in the plastic part A3 to obtain a plastic part with a special-shaped nut implanted therein.

[0072] Among them, the specific working principle of the nut positioning bolt automatic tightening device is:

[0073] First, the assembly platform B6 is located in the first position. The nut feeding mechanism B2 and the positioning bolt feeding mechanism B3 are used to drop the nut and the positioning bolt into the nut limiting groove B601 and the positioning bolt limiting groove B602 of the assembly platform B6. Then, the assembly platform B6 slides from the first position to the second position under the driving action of the first driving device B7. Under the driving action of the second driving device B404, the first movable plate B403 allows the first screwdriver B402 to pass through the third through hole B1003 of the pressure plate seat B1002 and the first through hole B603 of the assembly platform B6 in sequence, and approach the positioning bolt direction, so that the first screwdriver B402 cooperates with the positioning bolt A2 and further pushes the positioning bolt A2 to make the positioning bolt A2 contact with the nut A1. At the same time, the first limiting mechanism B9, the second limiting mechanism B10 and the third limiting mechanism B11 limit the position and angle of the nut A1 and the positioning bolt A2. Then, the first rotating motor B401 drives the first screwdriver B402 to rotate, and the positioning bolt A2 and the nut A1 are threadedly connected to form the nut positioning bolt integrated part A4. After the assembly is completed, the third driving device B502 drives the first clamping block B503 and the second clamping block B504 to clamp the nut positioning bolt integrated part A4, and then under the driving action of the fourth driving device B505, the second movable plate B501 moves along the track B506 to the top of the first collection box B8, and then the third driving device B502 releases the clamping action of the first clamping block B503 and the second clamping block B504 on the nut positioning bolt integrated part A4, so that the nut positioning bolt integrated part A4 falls into the first collection box B8. At this point, the automatic screwing of the nut A1 and the positioning bolt A2 is completed. Finally, the assembly platform B6 slides back to the first position under the driving action of the first driving device B7 to repeat the above operation.

[0074] Among them, the specific working principle of the automatic screw-out device for the positioning bolt is:

[0075] Place the plastic part A3 on the plastic part placement table C3, and the positioning bolt A2 passes through the fourth through hole C301 of the plastic part placement table C3. The rotary clamping cylinder C201 drives the clamping rod C202 to rotate 90 degrees and descend to clamp and fix the plastic part A3 on the plastic part placement table C3. The lifting cylinder C5 drives the lifting plate C501 to rise, thereby causing the rotary removal mechanism C7 to move upward. The second screwdriver C702 passes through the fifth through hole C8011 of the first collection plate C801 to cooperate with the positioning bolt A2. The second rotating motor C701 drives the second screwdriver C702 to rotate and unscrew the positioning bolt A2. When the positioning bolt A2 is completely unscrewed and separated from the nut A1, the lifting cylinder C5 starts again to drive the lifting plate C501 to move downward, causing the second screwdriver C702 to descend below the first collection plate C801. Since the diameter of the fifth through hole C8011 of the first collecting plate C801 is larger than the diameter of the second screwdriver C702 and smaller than the diameter of the positioning bolt A2, the positioning bolt A2 cannot pass through the fifth through hole C8011 together with the second screwdriver C702, and can only slide along the inclined first collecting plate C801 into the second collecting box C802. At this point, the positioning bolt A2 is automatically screwed out.

[0076] The beneficial effects of this embodiment are:

[0077] In the existing process of implanting special blind hole nuts in molds, an automatic screwing device for nut positioning bolts and an automatic screwing device for positioning bolts are added. The automatic screwing device for nut positioning bolts is used to automatically screw the nut and the positioning bolt together to form a nut positioning bolt integrated part. The automatic screwing device for positioning bolts is used to automatically rotate and remove the positioning bolts in the plastic part after injection molding. This realizes the fully automatic implantation and injection molding production of special-shaped blind hole nuts, reduces the labor force, and meets the mass production needs of enterprises.

[0078] The above is a specific description of the preferred implementation of the present invention, but the present invention is not limited to the described embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. An automatic in-mold injection molding production line for special-shaped blind hole nuts, characterized in that; It includes a nut positioning bolt automatic screwing device, a manipulator, a mold and a positioning bolt automatic unscrewing device which are arranged in sequence; The nut positioning bolt automatic screwing device automatically screws the nut and the positioning bolt together to form a nut positioning bolt integrated part, the manipulator is used to grab the nut positioning bolt integrated part and insert it into the corresponding hole position of the mold, and the positioning bolt automatic screwing device automatically rotates and removes the positioning bolt in the plastic part after injection molding. The nut positioning bolt automatic screwing device includes a first base, and the first base is provided with a nut feeding mechanism, a positioning bolt feeding mechanism, a rotating screwing mechanism, a fixed transportation mechanism and an assembly platform; The assembly platform is provided with a nut limiting groove and a positioning bolt limiting groove for limiting the nut and the positioning bolt respectively, and one side of the assembly platform is drivingly connected to a first driving device. Under the driving action of the first driving device, the assembly platform slides between a first position and a second position of the first base; When the assembly platform is located at the first position, the discharge ports of the nut feeding mechanism and the positioning bolt feeding mechanism are aligned with the nut limiting groove and the positioning bolt limiting groove respectively; when the assembly platform is located at the second position, the rotating screwing mechanism and the nut limiting groove and the positioning bolt limiting groove are located on the same straight line, and the fixed transportation mechanism is located above the nut limiting groove and the positioning bolt limiting groove, so that the rotating screwing mechanism can limit and fix the nut during the screwing and assembly of the positioning bolt and the nut, and transport the screwed and assembled nut and positioning bolt integrated part to the first collection box, and the positioning bolt automatic screwing device includes a second base, and a clamping mechanism and a plastic part placement table are provided above the second base; a fixed bracket, a lifting seat, a rotating removal mechanism and a positioning bolt collection mechanism are provided below the second base; The clamping mechanism comprises a rotary clamping cylinder and a clamping rod, the output end of the rotary clamping cylinder is connected to the clamping rod; the plastic part placement table is located on one side of the clamping mechanism, and the plastic part placement table is embedded on the second base, the upper surface of the plastic part placement table matches the plastic part, and the plastic part placement table is provided with a fourth through hole for the positioning bolt to pass through; The fixed bracket is fixedly connected with a lifting cylinder via a fixing plate, the output end of the lifting cylinder is connected to the lifting plate, the lifting plate is fixedly connected to the lifting seat via a lifting rod, the rotary take-out mechanism is fixedly connected to the lifting seat, and under the driving action of the lifting cylinder, the rotary take-out mechanism moves up and down; the rotary take-out mechanism includes a second rotary motor and a second screwdriver, and the driving end of the second rotary motor is connected to the second screwdriver; The positioning bolt collection mechanism is fixedly connected to the second base, and includes a first collection plate and a second collection box. The first collection plate is inclined and has a fifth through hole. The second screwdriver, the fifth through hole and the fourth through hole are aligned in sequence. The diameter of the fifth through hole is larger than the diameter of the second screwdriver and smaller than the diameter of the positioning bolt. The second collection box is located at the inclined lower end of the first collection plate.

2. The automatic in-mold injection molding production line for special-shaped blind hole nuts according to claim 1 is characterized in that: The nut feeding mechanism is a first automatic feeding vibration plate, and the positioning bolt feeding mechanism is a second automatic feeding vibration plate; The rotary screwing mechanism comprises a first rotary motor and a first screwdriver, wherein the first rotary motor is fixedly connected to the first movable plate, the first movable plate is slidably connected to the first base via a second driving device, the driving end of the first rotary motor is connected to the first screwdriver, and the assembly platform is provided with a first through hole for the first screwdriver to enter and exit; The fixed transport mechanism includes a second movable plate, a third driving device, a first clamp block and a second clamp block, the third driving device is fixedly connected to the second movable plate, the driving end of the third driving device is connected to the first clamp block and / or the second clamp block, the surface of the assembly platform is provided with a sliding groove for the first clamp block and the second clamp block to slide, the sliding groove is located on the left and right sides of the positioning bolt limiting groove and / or the nut limiting groove; the first clamp block and the second clamp block clamp the nut positioning bolt integrated part through the third driving device; the second movable plate is transported to the top of the first collection box along the track by the fourth driving device.

3. The automatic in-mold injection molding production line for special-shaped blind hole nuts according to claim 2 is characterized in that: A first limiting mechanism, a second limiting mechanism and a third limiting mechanism are also provided; The first limiting mechanism and the second limiting mechanism are fixedly connected to the first base, and the first limiting mechanism and the second limiting mechanism are respectively located on the left and right sides of the assembly platform when the assembly platform is in the second position; the first limiting mechanism includes a fifth driving device and a push rod, the driving end of the fifth driving device is connected to the push rod, and the push rod moves away from / approaching the end of the nut away from the positioning bolt through the fifth driving device, and a second through hole for the push rod to enter and exit is provided on the assembly platform; the second limiting mechanism includes a pressing plate and a pressing plate seat, the pressing plate is fixedly connected to the pressing plate seat in an L shape, the pressing plate is located above the limiting groove of the positioning bolt, and the pressing plate seat is provided with a third through hole for the first screwdriver to enter and exit; The third limiting mechanism includes a limiting plate, which is fixedly connected to the second movable plate. The second movable plate moves up and down along the track through the fourth driving device, and the limiting plate is located directly above the nut limiting groove.

4. The automatic in-mold injection molding production line for special-shaped blind hole nuts according to claim 1 is characterized in that: A guide seat is also fixedly provided on the fixed bracket, and the guide seat is located between the lifting plate and the second base; the guide seat includes a guide block and a guide plate, and the lifting seat is provided with a guide slide rail that matches the guide block, and the guide slide rail is vertically arranged; a sixth through hole is opened on the guide plate for the lifting rod to pass through, and a spring is sleeved on the outer side of the lifting rod, and the spring is located between the lifting seat and the guide plate.

5. The automatic in-mold injection molding production line for special-shaped blind hole nuts according to claim 4 is characterized in that: The clamping mechanism, the plastic part placement table, the rotating taking-out mechanism, the lifting seat, the guide seat, and the positioning bolt collecting mechanism are provided in corresponding numbers and are arranged symmetrically on the left and right.

6. The automatic in-mold injection molding production line for special-shaped blind hole nuts according to claim 5 is characterized in that: The positioning bolt collection mechanism is also provided with a second collection plate, which is located between the first collection plate and the second collection box; the second collection plate is arranged at an angle, and the inclined upper end of the second collection plate is aligned with the inclined lower ends of several of the first collection plates, and the inclined lower end of the second collection plate is aligned with the second collection box; the second collection plate is provided with a seventh through hole for the second rotating motor to pass through.

7. The automatic in-mold injection molding production line for special-shaped blind hole nuts according to claim 1 is characterized in that: A vertically arranged guide column is provided between the fixing plate and the second base, and the lifting plate passes through the guide column and is connected with the guide column in an up-and-down sliding manner.

8. The method for realizing the automatic implantation of special-shaped blind hole nuts into the mold injection molding production line as claimed in claim 1, characterized in that: The steps include: Step 1: Use a nut and positioning bolt automatic tightening device to automatically tighten the nut and the positioning bolt to form a nut and positioning bolt integrated part; Step 2: Grab the nut and positioning bolt integrated part of step 1 by the robot and insert it into the corresponding hole of the mold; Step 3: performing injection molding operation on the mold into which the nut positioning bolt integrated part has been inserted in step 2, and obtaining a plastic part after the mold is opened; Step 4: placing the plastic part in step 3 in a positioning bolt automatic screwing-out device, and using the positioning bolt automatic screwing-out device to automatically rotate and remove the positioning bolt in the plastic part to obtain a plastic part with a special-shaped nut implanted therein.

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