CN116494461A

CN116494461A - Mounting tool for embedded nut for injection molding and using method thereof

Info

Publication number: CN116494461A
Application number: CN202310401646.XA
Authority: CN
Inventors: 童剑锋
Original assignee: Ningbo Yosun Auto Parts Co ltd
Current assignee: Ningbo Yosun Auto Parts Co ltd
Priority date: 2023-04-07
Filing date: 2023-04-07
Publication date: 2023-07-28

Abstract

The invention discloses an embedded nut placing tool for injection molding and a use method thereof, wherein the placing tool comprises a plurality of directional fixing mechanisms, each directional fixing mechanism comprises an ejection cylinder, at least one ejector sleeve, a clamping push rod and a driving device, wherein the clamping push rod is arranged corresponding to the ejector sleeve, the ejector sleeve and the clamping push rod are concentrically arranged, the ejection cylinder is used for driving the clamping push rod to extend out of or retract into the ejector sleeve, a limit bulge is elastically arranged on the ejector sleeve, a limit groove is arranged on the embedded nut corresponding to the position of the limit bulge, and the driving device is used for driving the embedded nut to rotate until the limit groove is matched with the limit bulge to finish the orientation of the embedded nut. The invention provides an embedded nut placement tool for injection molding, which ensures good consistency of finished products of injection molding parts finished in different batches by arranging a driving device, a limiting protrusion and a limiting groove for positioning embedded nuts.

Description

Mounting tool for embedded nut for injection molding and using method thereof

Technical Field

The invention relates to the technical field of nut feeding machinery, in particular to an embedded nut placing tool for injection molding and a using method thereof.

Background

Nuts are widely used as inserts in injection molding, and are commonly used to secure various mechanical devices or components. In injection molding, the nut is mainly used as an insert to increase the connection strength and stability of the injection molding and other components, and is often used together with bolts or screws.

At present, a nut is usually implanted into an injection mold by using a simple jig manually, and then the nut is fixed in an injection molding piece by means of a cycle process of mold closing and molding of an injection molding machine. The process method is simple and feasible, but has the problems of low efficiency, manpower waste, high input cost and the like. In order to solve the problem of manually implanting nuts, more and more enterprises adopt automatic equipment and robots to complete the implantation work of the nuts, and the method not only can improve the production efficiency and quality, but also can reduce the manpower input and the production cost, thereby being a development trend of the future injection molding industry.

Because the internal thread of the embedded nut is a standard internal thread, the embedded nut can be matched with any standard external thread for use, and the directional installation of the embedded nut is generally not required. However, when a plurality of embedded nuts are simultaneously included in the injection molding part, in order to ensure consistency of finished products of injection molding parts in different batches, the problem of orientation of the embedded nuts needs to be solved.

Disclosure of Invention

The present invention aims to solve one of the technical problems in the related art to a certain extent. Therefore, the invention provides an embedded nut placing tool for injection molding, which ensures good consistency of finished products of injection molding finished products of different batches by arranging a driving device, a limiting protrusion and a limiting groove for embedding nuts.

The invention further provides a using method of the embedded nut placing tool for injection molding.

The technical scheme adopted by the invention is as follows: the utility model provides an frock is laid to embedded nut for injection molding, includes a plurality of directional fixed establishment, directional fixed establishment includes ejecting cylinder, at least one department section of thick bamboo, and the centre gripping push rod and the drive arrangement that correspond the setting with department section of thick bamboo, department section of thick bamboo with centre gripping push rod sets up with one heart, ejecting cylinder is used for driving centre gripping push rod towards stretching out or retracting into department section of thick bamboo, elastic mounting has spacing arch on the department section of thick bamboo, is equipped with the spacing groove on the embedded nut corresponding to spacing protruding position, drive arrangement is used for driving the embedded nut rotation, until spacing groove with spacing arch cooperation is accomplished the orientation of embedded nut.

The directional fixing mechanism is used for completing positioning and fixing of the embedded nut so as to ensure that the directions of internal threads of the embedded nut in the finished injection molding part are consistent, thereby improving the quality stability and the production efficiency of the product. Specifically, the directional fixing mechanism comprises a driving device, a limiting protrusion, an embedded nut, a clamping push rod, an ejection cylinder and the like. When the driving device drives the embedded nut to rotate, the limiting protrusion is in an elastic shrinkage state until the limiting protrusion is aligned with and matched with the limiting groove on the embedded nut, so that the orientation of the embedded nut is completed. Simultaneously, the embedded nut stops rotating under the limiting action of the limiting bulge. Then, the clamping push rod passes through the screw hole of the embedded nut under the action of the ejection cylinder, and the fixation of the oriented embedded nut is completed. And finally, transferring the oriented embedded nut into a die to ensure that the consistency of finished injection molding products finished in different batches is good. The automatic device has the advantages of stable positioning and fixing effects, simplicity and convenience in operation and capability of greatly improving production efficiency and product quality stability.

According to one embodiment of the invention, the free end of the clamping push rod comprises a middle piece and elastic pieces positioned at two sides of the middle piece, and a gap for elastic deformation of the elastic pieces is arranged between the elastic pieces and the middle piece; the clamping push rod penetrates through the screw hole of the embedded nut to finish clamping and driving the embedded nut, and the embedded nut after being oriented is prevented from turning.

According to one embodiment of the present invention, the intermediate piece and the elastic piece are combined to form a head portion, the outer diameter of which is larger than the outer diameter of the clamping putter shaft; the head is propped against the inner wall of the screw hole of the embedded nut, so that the embedded nut is clamped.

According to one embodiment of the invention, the two directional fixing mechanisms are respectively arranged on two second sliding tables, and the two second sliding tables are in sliding fit with the same second guide rail.

According to one embodiment of the invention, the second sliding tables are respectively connected with piston ends of second telescopic cylinders; the second telescopic cylinder is used for driving the two second sliding tables to move towards the direction of approaching or separating from each other.

According to one embodiment of the invention, the second sliding table and the second telescopic cylinder are both mounted on the first sliding table.

According to one embodiment of the invention, the sliding table further comprises a base, wherein the base is provided with a first guide rail, and the two first sliding tables are in sliding fit with the same first guide rail.

According to one embodiment of the invention, the first sliding table is connected with a piston end of a first telescopic cylinder, and the first telescopic cylinder is fixedly arranged on the base; the first telescopic cylinder is used for driving the two first sliding tables to move towards the direction of approaching or separating from each other so as to enable the plurality of directional fixing mechanisms to gather together, and the stroke required by movement during word segmentation and feeding of the mechanical claw is reduced.

The application method of the embedded nut placement tool for injection molding comprises the following steps:

s1, transferring the embedded nut to a station of a directional fixing mechanism by using a mechanical claw;

s2, loosening the mechanical claw, and enabling the head of the clamping push rod retracted into the driver to extend into the embedded nut, and driving the embedded nut to rotate by the driving device, wherein after the limiting protrusion is matched with the limiting groove, the head of the clamping push rod extends out of the embedded nut to complete fixation;

s3, removing the mechanical claws, and simultaneously transferring nuts on the directional fixing mechanisms into the die by the jig.

Drawings

In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a working state diagram of a nut setting tool according to an embodiment of the present invention;

fig. 2 is a perspective view of a nut placement tool according to an embodiment of the present invention;

FIG. 3 is a top view of a nut placement tool according to an embodiment of the present invention;

fig. 4 is a top view of the nut placement tool according to the embodiment of the present invention after being unfolded;

FIG. 5 is a schematic view of a base structure according to an embodiment of the present invention;

fig. 6 is a schematic structural diagram of a first sliding table in an embodiment of the present invention;

FIG. 7 is a perspective view of an orientation fixture according to an embodiment of the present invention;

FIG. 8 is an enlarged view of a portion of FIG. 7 at A;

fig. 9 is a schematic view of the construction of a threaded insert according to an embodiment of the present invention;

FIG. 10 is an enlarged view of a portion of an orientation fixture according to another embodiment of the present invention;

fig. 11 is a schematic view of the construction of a nut insert according to another embodiment of the present invention.

The reference numerals in the figures illustrate:

1. a base; 2. embedding a nut; 3. a first sliding table; 4. a first telescopic cylinder; 5. a first guide rail; 6. the second telescopic cylinder; 7. a first limiting plate; 8. a second sliding table; 9. a second guide rail; 10. a second limiting plate; 11. an ejection cylinder; 12. a barrel; 13. clamping the push rod; 14. a driving device; 15. a limit protrusion;

2a, a limit groove; 2b, a screw tail;

13a, middle sheet; 13b, elastic sheets; 13c, head;

14a, a driving belt.

Description of the embodiments

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

As shown in fig. 1-9, in this embodiment, an installation tool for an injection molding embedded nut 2 is disclosed, which includes a plurality of directional fixing mechanisms, the directional fixing mechanisms include an ejection cylinder 11, at least one barrel 12, a clamping push rod 13 corresponding to the barrel 12, and a driving device 14, the barrel 12 and the clamping push rod 13 are concentrically arranged, the ejection cylinder 11 is used for driving the clamping push rod 13 to extend out of or retract into the barrel 12, a limit protrusion 15 is elastically installed on the barrel 12, a limit groove 2a is provided on the embedded nut 2 corresponding to the position of the limit protrusion 15, and the driving device 14 is used for driving the embedded nut 2 to rotate until the limit groove 2a and the limit protrusion 15 cooperate to complete the orientation of the embedded nut 2.

Further, as shown in fig. 2 and 3, in this embodiment, the tooling includes eight directional fixing mechanisms, and the corresponding mold is an out-eight mold. As shown in fig. 7 and 8, in the present embodiment, the ejector sleeve 12 is fixedly mounted on the cylinder body of the ejector cylinder 11. The clamping push rod 13 is fixedly arranged at the piston end of the ejection cylinder 11, and when the clamping push rod 13 is retracted into the barrel 12, the top end of the clamping push rod 13 is lower than the upper end of the barrel 12, so that the end of the embedded nut 2 is abutted against the upper end of the barrel 12. When the clamping push rod 13 extends out of the barrel 12, the clamping push rod 13 penetrates through the screw hole of the embedded nut 2 and clamps and fixes the embedded nut.

Further, in the present embodiment, the driving device 14 includes a motor and a driving belt 14a, and the motor drives the driving belt 14a to perform a cyclic motion or a reciprocating motion through a transmission mechanism. The drive belt 14a has a certain tension which is in abutment with the outer circumference of the threaded insert 2 to drive the threaded insert 2 in rotation about the axis of the barrel 12.

Further, in this embodiment, the upper end edge of the barrel 12 is provided with a mounting hole along the axial direction of the barrel 12, and the limiting protrusion 15 includes a pin head and a spring, the spring is embedded in the mounting hole and connected with the pin head, and the upper end of the pin head extends out of the mounting hole and protrudes from the upper end surface of the barrel 12. During the rotation of the threaded insert 2, the bottom of the threaded insert 2 abuts against the upper end face of the barrel 12, so that the spring is compressed, and the pin head is retracted into the mounting hole, namely, the limit protrusion 15 is retracted. When the limit groove 2a on the embedded nut 2 rotates to the position of the limit protrusion 15, the pin head stretches out and is matched with the limit groove 2a under the action of the spring, so that the embedded nut 2 is locked. The position of the limit bulge 15 on the driver 12 is fixed, and the position of the limit groove 2a is fixed relative to the screw tail 2b of the internal thread of the embedded nut 2, so that the embedded nuts 2 of different batches are consistent in orientation.

Specifically, as shown in fig. 8, the free end of the clamping push rod 13 includes a middle piece 13a and elastic pieces 13b located at two sides of the middle piece 13a, and a gap for elastic deformation of the elastic pieces 13b is provided between the elastic pieces 13b and the middle piece 13 a.

Further, two notches are axially provided at the free end of the clamping push rod 13, and the two notches divide the free end of the clamping push rod 13 into three parts. I.e. the middle sheet 13a in the middle and the elastic sheets 13b on both sides. The middle piece 13a and the elastic piece 13b are combined to form a head 13c, and the outer diameter of the head 13c is larger than the outer diameter of the clamping push rod 13 shaft; the head 13c abuts against the inner wall of the screw hole of the insert nut 2, thereby clamping the insert nut 2.

Further, in the present embodiment, the head portion 13c has a guide portion having an outer diameter increasing from top to bottom for guiding the two elastic pieces 13b to be deformed toward the middle piece 13a to be reduced in diameter so that the holding push rod 13 penetrates into the screw hole of the insert nut 2. The head 13c also has another guide portion of decreasing outside diameter from top to bottom, the lower edge of which transitions with the shaft of the clamping pushrod 13, facilitating retraction of the clamping pushrod 13 into the barrel 12.

Specifically, as shown in fig. 5, the two directional fixing mechanisms are respectively installed on two second sliding tables 8, the two second sliding tables 8 are in sliding fit with the same second guide rail 9, and the second sliding tables 8 are respectively connected with piston ends of second telescopic cylinders 6; the second telescopic cylinders 6 are used for driving the two second sliding tables 8 to move towards each other or away from each other, and the second sliding tables 8 and the second telescopic cylinders 6 are both arranged on the first sliding table 3. The base 1 is provided with a first guide rail 5, and the two first sliding tables 3 are in sliding fit with the same first guide rail 5. The first sliding table 3 is connected with a piston end of a first telescopic cylinder 4, and the first telescopic cylinder 4 is fixedly installed on the base 1.

Further, as shown in fig. 3 and 6, a first limiting plate 7 is provided at the middle of the first rail 5 for limiting the travel of the first sliding table 3 along the first rail 5. Similarly, a second limiting plate 10 is disposed in the middle of the second guide rail 9, for limiting the travel of the second sliding table 8 along the second guide rail 9. In this embodiment, the upper end of the first limiting plate 7 is provided with a positioning hole, and when the jig uniformly clamps the embedded nuts 2 on the eight directional fixing mechanisms, the positioning column on the jig is matched with the positioning hole on the first limiting plate 7 in a positioning way.

Further, in the present embodiment, the first rail 5 is disposed perpendicular to the second rail 9, and on a horizontal plane, the first rail 5 is an X-axis rail, and the second rail is a Y-axis rail. As shown in fig. 3 and 4, in this embodiment, two bases 1 are disposed in parallel, each base 1 is provided with two first sliding tables 3, and each first sliding table 3 is provided with two second sliding tables 8 and a second guide rail 9.

The four feeding points are mutually close to each other, so that the feeding stroke of the mechanical claw is shortened, and the feeding stability is improved. Specifically, the four feeding points with larger intervals are usually close to each other, so that the mechanical claw can finish the operation of different feeding points only by moving a smaller distance during feeding, the movement times of the mechanical claw are reduced, and the feeding speed and precision are improved. The design scheme of mutually approaching can also effectively reduce the vibration and swing of the mechanical claw during feeding, thereby further improving the stability and the precision of feeding. Meanwhile, the design scheme can effectively reduce the use cost of the mechanical claw, prolong the service life of the mechanical claw and improve the production efficiency and the product quality.

Further, as shown in fig. 8 and 9, in the present embodiment, the pin head 13c of the limiting protrusion 15 is spherical, that is, the limiting protrusion 15 has a spherical head 13c, and the corresponding limiting groove 2a is a spherical groove adapted to the limiting protrusion 15.

Further, as shown in fig. 10 and 11, in another embodiment, the head 13c of the limit protrusion 15 is wedge-shaped, and when the wedge-shaped limit protrusion 15 is matched with the wedge-shaped limit groove 2a, the embedded nut 2 and the driver 12 can rotate unidirectionally around the axis of the embedded nut 2. The wedge-shaped head 13c of the limit projection 15 has an inclined surface at the upper end, one side of which has a vertical surface engaging with the upper end of the inclined surface, and correspondingly, a groove adapted to the wedge-shaped head 13c is provided on the end surface of the insert nut 2. When the vertical surface on the wedge-shaped head 13c is propped against the vertical surface of the wedge-shaped groove, the relative rotation of the embedded nut 2 and the driver 12 is limited, so that the purpose of reverse locking is achieved. Correspondingly, the nut 2 is rotated in the opposite direction, and the inclined surface on the wedge-shaped head 13c and the inclined surface on the wedge-shaped groove become guiding surfaces, guiding the limit projection 15 to slide out of the limit groove 2a.

In another embodiment, a method for using the fixture for placing the insert nut 2 for injection molding in the present embodiment is disclosed, which includes the following steps:

s1, transferring the embedded nut 2 to a station of a directional fixing mechanism by a mechanical claw;

s2, loosening the mechanical claw, and driving the embedded nut 2 to rotate by the driving device 14 while the head 13c of the clamping push rod 13 retracted into the driver 12 stretches into the embedded nut 2, and after the limit protrusion 15 is matched with the limit groove 2a, fixing the clamping push rod 13 by stretching out of the head 13c of the clamping push rod 13 from the embedded nut 2;

Further, as shown in fig. 3, in step S1, the first telescopic cylinder 4 and the second telescopic cylinder 6 drive the first sliding table 3 and the second sliding table 8 to move respectively, so that the four first sliding tables 3 are close to each other, and the two second sliding tables 8 on each first sliding table 3 are close to each other, so that the gripper can transfer the embedded nut 2 to the directional fixing mechanism on the second sliding table 8.

Further, as shown in fig. 4, in step S3, after the feeding of the eight directional fixing mechanisms is completed, the first telescopic cylinder 4 and the second telescopic cylinder 6 respectively drive the first sliding table 3 and the second sliding table 8 to move so as to separate the four first sliding tables 3 from each other, and the two second sliding tables 8 on each first sliding table 3 are separated from each other to be unfolded, so that the embedded nuts 2 on the eight directional fixing mechanisms are uniformly transferred into the mold by the embedded fixture.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.

Claims

1. The utility model provides a frock is laid with embedded nut to moulding plastics which characterized in that: the device comprises a plurality of directional fixing mechanisms, wherein each directional fixing mechanism comprises an ejection cylinder, at least one driver, a clamping push rod and a driving device, the clamping push rod is arranged corresponding to the driver, the driver and the clamping push rod are concentrically arranged, the ejection cylinder is used for driving the clamping push rod to extend out of or retract into the driver, limiting protrusions are elastically installed on the driver, limiting grooves are formed in positions, corresponding to the limiting protrusions, of the embedded nuts, and the driving device is used for driving the embedded nuts to rotate until the limiting grooves are matched with the limiting protrusions to finish the orientation of the embedded nuts.

2. The tooling for placing the insert nut for injection molding according to claim 1, wherein: the free end of the clamping push rod comprises a middle piece and elastic pieces positioned on two sides of the middle piece, and a gap for elastic deformation of the elastic pieces is formed between the elastic pieces and the middle piece.

3. The tooling for placing the insert nut for injection molding according to claim 2, wherein: the middle piece and the elastic piece are combined to form a head, and the outer diameter of the head is larger than that of the clamping push rod body.

4. The tooling for placing the insert nut for injection molding according to claim 1, wherein: the two directional fixing mechanisms are respectively arranged on the two second sliding tables, and the two second sliding tables are in sliding fit with the same second guide rail.

5. The tooling for placing the insert nut for injection molding according to claim 4, wherein: the second sliding table is respectively connected with a piston end of a second telescopic cylinder.

6. The tooling for placing the insert nut for injection molding according to claim 5, wherein: the second sliding table and the second telescopic cylinder are both arranged on the first sliding table.

7. The tooling for placing the insert nut for injection molding according to claim 6, wherein: the sliding table is characterized by further comprising a base, wherein a first guide rail is arranged on the base, and the two first sliding tables are in sliding fit with the same first guide rail.

8. The tooling for placing the insert nut for injection molding according to claim 7, wherein: the first sliding table is connected with a piston end of a first telescopic cylinder, and the first telescopic cylinder is fixedly installed on the base.

9. The application method of the embedded nut placement tool for injection molding is characterized by comprising the following steps of: the method comprises the following steps: