Nut taking and placing device for in-mold injection molding

Abstract

The utility model relates to a nut picking and placing device for in-mold injection molding, which comprises a support, an ejector sleeve with an ejector pin and an air cylinder, the ejector sleeve is connected with the support, the output end of the air cylinder is connected with the ejector pin, the length of an inner hole of the ejector sleeve is larger than that of a nut, a plurality of slotted holes are arrayed in the circumferential direction of the inner hole, and a ball is arranged in each slotted hole. An elastic bandage is arranged on the outer wall of the ejector sleeve, the elastic bandage is elastically connected with the balls, the ejector sleeve is driven by the air cylinder to take and place the nuts, in and out of the nuts are controlled through the balls and the elastic bandage, the length of inner holes of the ejector sleeve is larger than that of the nuts, and therefore a plurality of nuts can be placed in each inner hole. The structure is simple, suction nozzles in one-to-one correspondence with the nuts do not need to be arranged, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of in-mold injection molding, in particular to a nut taking and placing device for in-mold injection molding. Background Art

[0002] In order to embed multiple nuts during injection molding, a nut picking and placing device is usually installed at the end of the injection molding robot arm to pick and place the nuts. If the nuts are placed manually on the positioning column of the nut positioning fixture, not only is the labor-intensive, but there are also safety hazards; if the nuts are placed directly into the mold in the injection molding machine manually, there are serious safety hazards. The existing nut picking and placing device includes a bracket, a suction nozzle, a positive pressure air source, a positive pressure to negative pressure converter and other components. Its working process is to suck up the nuts on the positioning column through the negative pressure suction nozzle, and then implant the nuts into the corresponding position in the mold through positive pressure. When implanting multiple nuts, the existing nut picking and placing device needs to be equipped with multiple suction nozzles, and each suction nozzle can only suck up one nut. Therefore, multiple nut positioning columns need to be configured on the nut positioning fixture, and a nut output device is also required to be able to place multiple nuts on each nut positioning column respectively. For example, if N nuts need to be implanted, the existing nut picking and placing device needs to be equipped with N suction nozzles, the nut positioning fixture needs to be equipped with N nut positioning columns, and the nut output device needs to be able to place the N nuts on each nut positioning column respectively. Therefore, the existing nut picking and placing device has a complex structure and a high manufacturing cost. Utility Model Content

[0003] The purpose of the utility model is to design a nut picking and placing device for in-mold injection molding to solve the technical problems raised in the above background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an in-mold injection nut picking and placing device, comprising a bracket, a sleeve with an ejector pin and a cylinder, the sleeve being connected to the bracket, the output end of the cylinder being connected to the ejector pin, the length of the inner hole of the sleeve being greater than the length of the nut, the inner hole having a plurality of slots arrayed in a circumferential direction, each of the slots being provided with a ball, the outer wall of the sleeve being provided with an elastic band, and the elastic band being elastically connected to the ball.

[0005] Furthermore, the bracket is provided with a mounting hole, and the cylinder is fixed in the mounting hole.

[0006] Furthermore, a guide rod is installed on the bracket, the ejector pin is connected to the cylinder via a movable plate, and the movable plate is slidably connected to the guide rod via a shaft sleeve.

[0007] Furthermore, a plurality of inner holes are provided on the sleeve.

[0008] Furthermore, it also includes a positioning plate, on which a plurality of positioning columns for placing the nuts are provided, and the positioning columns correspond one-to-one to the inner holes.

[0009] Compared with the prior art, the utility model has the following beneficial effects: the utility model drives the sleeve to take and place the nut by the cylinder, controls the entry and exit of the nut by the ball and elastic band, and the length of the inner hole of the sleeve is greater than the length of the nut, so each inner hole can hold multiple nuts, improving the efficiency of taking and placing the nut. The utility model has a simple structure and does not need to be equipped with a suction nozzle corresponding to the nut one by one, thus reducing the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0011] Figure 2 It is a bottom view of the utility model;

[0012] Figure 3 It is a cross-sectional view of the utility model;

[0013] Figure 4 for Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0014] Figure 5 It is a structural schematic diagram of the positioning column of the utility model;

[0015] Figure 6 for Figure 5 Schematic diagram of the enlarged structure at B in FIG.

[0016] The names of the components marked in the figure are as follows: 1. Bracket; 2. Sleeve; 3. Ejector pin; 4. Inner hole; 5. Cylinder; 6. Ball; 7. Elastic band; 8. Guide rod; 9. Moving plate; 10. Bushing; 11. Positioning plate; 12. Positioning column; 13. Nut. DETAILED DESCRIPTION

[0017] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose of the utility model, the specific implementation method, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0018] Example: Please refer to Figure 1-6, a nut picking and placing device for in-mold injection molding, comprising a bracket 1, a sleeve 2 with an ejector pin 3 and a cylinder 5, the bracket 1 is connected to an existing injection molding robot arm, in this embodiment, both ends of the bracket 1 are provided with a sleeve 2 and a cylinder 5, that is, both ends of the bracket 1 can be used to pick up and place nuts 13, which greatly improves work efficiency; it also includes a positioning plate 11, and the positioning plate 11 is provided with a plurality of positioning columns 12 for placing nuts 13, that is, the nuts 13 are sleeved on the positioning columns 12, and each positioning column 12 can be sleeved with one or more nuts 13, the positioning columns 12 correspond to the inner holes 4 one by one, and the diameter of the positioning columns 12 is smaller than the diameter of the inner hole 4 of the sleeve 2, and the positioning columns 12 are conducive to the rapid material removal of the nuts 13; The sleeve 2 is connected to the bracket 1. Preferably, a mounting hole is provided on the bracket 1 to facilitate the quick assembly of the sleeve 2. The sleeve 2 is fixed in the mounting hole, and the tail end of the sleeve 2 is embedded in the mounting hole, and the head end of the sleeve 2 extends out of the bracket 1; the output end of the cylinder 5 is connected to the ejector pin 3. Preferably, a guide rod 8 is installed on the bracket 1, and the ejector pin 3 is connected to the cylinder 5 through a movable plate 9, and the movable plate 9 is slidably connected to the guide rod 8 through a sleeve 10. Specifically, a through hole is provided on the movable plate 9, and the sleeve 10 is fixed in the through hole. The inner diameter of the sleeve 10 is larger than the diameter of the guide rod 8, and the guide rod 8 and the sleeve 10 are clearance-matched. The sleeve 10 can reduce the friction between the guide rod 8 and the movable plate 9, and the cylinder 5 pushes The movable plate 9 moves along the guide rod 8. Guide rods 8 are provided at both ends of the movable plate 9, so that the movable plate 9 moves more smoothly; a plurality of inner holes 4 are provided on the sleeve 2, and preferably, three inner holes 4 are provided on each sleeve 2, so as to further improve the working efficiency; the length of each inner hole 4 of the sleeve 2 is greater than the length of the nut 13, and preferably, the length of the inner hole 4 is greater than 3 times the length of the nut 13, and the diameter of the inner hole 4 is greater than the diameter of the nut 13, so that each inner hole 4 can hold at least 3 nuts 13; the inner hole 4 has a plurality of slots in an array in the circumferential direction, and the slots are arranged at the bottom of the sleeve 2, and a ball 6 is provided in each slot, and the spherical surface of the ball 6 extends into the inner hole 4, so that the inner hole 4 The opening is reduced and is smaller than the diameter of the nut 13, so that the nut 13 cannot fall from the inner hole 4, and the ball 6 limits the nut 13 from falling downward; the ball 6 is preferably a glass ball to reduce the friction between the ball 6 and the slot, and the slot is larger than the size of the ball 6, that is, the ball 6 can be completely ejected into the slot, so that the spherical surface of the ball 6 is tangent to the inner wall of the inner hole 4, so that the opening of the inner hole 4 is restored to a size equal to the inner diameter of the inner hole 4. Specifically, the outer wall of the sleeve 2 is provided with an elastic band 7, and the elastic band 7 is elastically connected to the ball 6. The elastic band 7 is preferably a rubber band. Under the action of the rubber band, the ball 6 can move in the slot, so that the opening of the inner hole 4 can be scaled, thereby limiting the entry and exit of the nut 13.

[0019] The working principle of this embodiment is as follows: when in use, the nut 13 is sleeved on the positioning column 12 through the external nut output device, the injection molding robot arm drives the bracket 1 to move to the top of the positioning column 12, and aligns the inner hole 4 on the sleeve 2 with the positioning column 12, and the inner hole 4 corresponds to the positioning column 12 one by one, the injection molding robot arm drives the bracket 1 to move downward, so that the positioning column 12 is inserted into the inner hole 4, and under the action of the outer wall of the nut 13, the ball 6 bounces into the slot, and the nut 13 enters the inner hole 4 and moves to the top of the ball 6. Under the action of the elastic band 7, the ball 6 automatically embeds into the inner hole 4, so that the opening of the inner hole 4 is reduced, and the ball 6 blocks the nut 13 that has entered the inner hole 4 from falling downward; the injection molding robot arm drives the bracket 1 to move to the front of the mold, and aligns the inner hole 4 on the sleeve 2 with the positioning column 12, and the inner hole 4 corresponds to the positioning column 12 one by one, and the injection molding robot arm drives the bracket 1 to move to the front of the mold, and aligns the inner hole 4 on the sleeve 2 with the positioning column 12, and the inner hole 4 corresponds to the positioning column 12 one by one. The inner hole 4 is vertically aligned with the implantation position of the nut 13 in the mold, and the movable plate 9 is pushed by the cylinder 5, so that the movable plate 9 moves along the guide rod 8, thereby driving the ejector pin 3 to push the nut 13 in the inner hole 4 to move outward. Under the action of the outer wall of the nut 13, the ball 6 bounces into the slot again, so that the nut 13 is implanted from the inner hole 4 to the corresponding position in the mold; wherein, multiple nuts 13 can be put on each positioning column 12, that is, multiple nuts 13 can be put on the same positioning column 12 through the nut output device, and each inner hole 4 can hold multiple nuts 13 at one time, and multiple nuts 13 can be implanted into the mold at one time, which greatly improves the work efficiency, and the structure is simple, and there is no need to configure a suction nozzle corresponding to the nut 13 one by one, thereby reducing the manufacturing cost.

[0020] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A nut picking and placing device for in-mold injection molding, characterized in that: It comprises a bracket (1), a sleeve (2) with a ejector pin (3) and a cylinder (5), wherein the sleeve (2) is connected to the bracket (1), the output end of the cylinder (5) is connected to the ejector pin (3), the length of the inner hole (4) of the sleeve (2) is greater than the length of the nut (13), the inner hole (4) has a plurality of slots arranged in a circumferential direction, each of the slots is provided with a ball (6), and the outer wall of the sleeve (2) is provided with an elastic band (7), and the elastic band (7) is elastically connected to the ball (6).

2. The nut picking and placing device for in-mold injection molding according to claim 1 is characterized in that: The bracket (1) is provided with a mounting hole, and the cylinder (2) is fixed in the mounting hole.

3. The nut picking and placing device for in-mold injection molding according to claim 1 is characterized in that: A guide rod (8) is installed on the bracket (1), the ejector pin (3) is connected to the cylinder (5) via a movable plate (9), and the movable plate (9) is slidably connected to the guide rod (8) via a shaft sleeve (10).

4. The nut picking and placing device for in-mold injection molding according to claim 1 is characterized in that: The sleeve (2) is provided with a plurality of inner holes (4).

5. The nut picking and placing device for in-mold injection molding according to claim 4 is characterized in that: It also comprises a positioning plate (11), on which a plurality of positioning columns (12) for placing the nuts (13) are provided, and the positioning columns (12) correspond one-to-one to the inner holes (4).

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