Injection mold package part iron piece implantation mistake proofing device

Abstract

The utility model discloses a kind of injection mold plastic package iron piece implantation mistake-proofing device, the fixed mold cavity of fixed mold is equipped with the iron piece positioning device for positioning iron piece, into son can be slidably inserted into the into son slide in movable mold of set distance, into son elastic member provides the elastic retention force of the direction of one end of into son slide to into son elastic member, so that into son one end can extend into son slide one end outside, when mould clamping, into son one end is blocked by iron piece and can retreat to the direction of the other end of into son slide, into son position sensing device located in into son slide can sense the position of into son under mould clamping state, into son position sensing device and injection molding machine control system communicate, and injection molding machine control system can judge whether iron piece is missed or whether iron piece is wrongly installed according to the sensing information fed back by into son position sensing device, and control injection molding machine starts injection molding or stops injection molding and opens mould, the utility model can automatically judge whether iron piece is missed or wrongly installed in fixed injection mold, avoid artificial detection, improve product yield.

Description

Technical Field

[0001] This utility model relates to an injection mold, and more particularly to a device for preventing errors in the implantation of plastic-coated iron parts in an injection mold. Background Technology

[0002] Currently, many products consist of iron parts covered with a plastic shell. These products are often manufactured using in-mold injection molding to ensure a strong bond between the iron parts and the plastic shell, as well as product precision, while also improving production efficiency and avoiding manual assembly.

[0003] Many PVC-coated products are series products, and the PVC-coated parts need to be embedded with similar iron parts, such as iron parts with the same shape but only minor feature differences, or iron parts with the same shape but only different hole diameters. There are also PVC-coated parts that need to be embedded with iron parts that are pre-riveted and assembled together. Currently, before in-mold injection molding, workers need to inspect the shape, specifications, dimensions, and whether the structure is complete of the iron parts, and then the mold is closed and injection molded.

[0004] This manual inspection method is prone to errors and has low efficiency, which seriously affects the efficiency of in-mold injection molding production. It also inevitably leads to defective products flowing out to customers, causing major customer complaints and damaging the company's image and profits. Utility Model Content

[0005] To overcome the above-mentioned defects, this utility model provides a device for preventing the incorrect insertion of iron parts in injection molded parts. This device can effectively prevent the omission or incorrect placement of iron parts during in-mold injection molding, thereby improving the product yield and safety, and reducing the cost of manual inspection.

[0006] The technical solution adopted by this utility model to solve its technical problem is: a device for preventing the incorrect insertion of iron parts into a plastic-coated injection mold, comprising a fixed mold, a moving mold, an insert, an insert elastic element, an insert position sensing device, and an injection molding machine control system. The fixed mold has a fixed mold cavity, and an iron part positioning device is provided within the fixed mold cavity. The iron part can be stopped and positioned on the iron part positioning device. The moving mold has an insert slide, and the insert can be slidably inserted into the insert slide by a set distance. The insert elastic element provides an elastic holding force to the insert towards one end of the insert slide, allowing one end of the insert to extend beyond the outer side of one end of the insert slide. At a fixed distance, when the mold is closed, one end of the insert extending outward from the insert slide can tightly abut against the iron part positioned on the iron part positioning device, and the insert end can retract towards the other end of the insert slide due to the obstruction of the iron part. The insert position sensing device is fixedly installed inside the insert slide. The insert position sensing device can sense the position of the insert in the mold closing state. The insert position sensing device communicates with the injection molding machine control system through wired or wireless means. The injection molding machine control system can determine whether the iron part is missing or incorrectly installed based on the sensing information fed back by the insert position sensing device, and control the injection molding machine to start or stop injection and open the mold.

[0007] As a further improvement of this utility model, the insert slide on the moving mold extends along the mold closing direction. The diameter of one end of the insert is between the diameters of the positioning holes on two different specifications of iron parts, and the insert is coaxially aligned with the positioning hole on the stop positioning iron part of the iron part positioning device. When the mold is closed, one end of the insert can be tightly pressed against the surface of the iron part with the positioning hole or extend into the positioning hole of the wrong iron part.

[0008] As a further improvement of this utility model, the moving mold includes a moving template and a moving mold insert. The moving template is provided with an insert positioning groove. An insert clearance groove is formed on the bottom surface of the insert positioning groove. An insert position sensing device is fixedly installed on the bottom surface or side wall of the insert clearance groove. The moving mold insert is fixedly installed in the insert positioning groove by connecting screws. The insert slide is provided on the moving mold insert. When the mold is closed, the insert slides towards the insert clearance groove because one end is blocked by the correct iron part, so that the other end of the insert can trigger the insert position sensing device on the bottom surface or side wall of the insert clearance groove.

[0009] As a further improvement of this utility model, the insert slide is a countersunk through hole with an inner diameter at one end smaller than that at the other end, the inner diameter of the insert clearance groove is not smaller than the inner diameter at the other end of the insert slide, and the insert clearance groove and the insert slide are coaxially and directly opposite each other. The insert is a T-shaped column with an outer diameter at one end smaller than that at the other end, and the stepped surface between the two ends of the insert stops on the countersunk bottom surface of the insert slide.

[0010] As a further improvement of this utility model, a metal part pressing and avoiding groove is provided on one end face of the moving mold insert. The one end face of the moving mold insert can press the side of the metal part facing the moving mold direction. The metal part pressing and avoiding groove on the one end face of the moving mold insert can accommodate the protruding structure on the metal part. The bottom surface of the metal part pressing and avoiding groove can press the surface of the protruding structure on the metal part.

[0011] As a further improvement of this utility model, the insert position sensing device is a contact switch. When the insert slides to the design position in the direction of the other end of the insert slide, the contact switch can be triggered. The contact switch is connected in series with the injection molding machine control system to form a conductive circuit. The injection molding machine control system determines the insert position based on whether there is current flowing through the conductive circuit.

[0012] As a further improvement of this utility model, the iron part positioning device in the fixed mold cavity includes an iron part positioning pin, which can be inserted into the positioning hole on the iron part to a set depth to achieve the stop positioning of the iron part in the horizontal direction.

[0013] As a further improvement of this utility model, a fixed mold insert is installed in the fixed mold cavity through a connector. The fixed mold insert is provided with a countersunk pin hole with an inner diameter smaller than that of the moving mold end. The positioning pin is a T-shaped pin. The larger diameter end of the positioning pin can be accommodated in the pin hole at the end away from the moving mold, and the larger diameter end of the positioning pin is tightly clamped between the countersunk bottom surface of the countersunk pin hole and the bottom surface of the fixed mold cavity. The smaller diameter end of the positioning pin extends out of the surface of the fixed mold insert by a set distance through the smaller diameter end of the countersunk pin hole.

[0014] As a further improvement of this utility model, the positioning pin forms a tapered structure with a gradually decreasing diameter at the end facing the moving mold.

[0015] As a further improvement of this utility model, an alarm device is also provided, and the injection molding machine control system can control the alarm device to issue an alarm.

[0016] The beneficial effects of this utility model are as follows: This utility model uses an insert that can slide in the moving mold and corresponds to the stop and position iron part in the fixed mold. The insert is provided with an original elastic holding force by an elastic element, so that when the mold is closed, the insert can tightly abut against the surface of the stop and position iron part in the fixed mold. When the iron part is missing in the fixed mold or the positioning hole size on the iron part is incorrect, the insert will not move to the correct position. The injection molding machine control system can then determine whether the iron part is missing or the iron part is incorrect based on the signal from the insert position sensing device. In this case, the injection molding machine will not perform injection molding, and the mold will be opened, making it convenient for workers to add iron parts or replace them with the correct ones. When the iron part is correctly installed in the fixed mold, the insert will move to the correct position, and the injection molding machine control system will then control the injection molding machine to perform injection molding. This utility model accurately determines whether the iron part is missing in the fixed mold and whether the iron part is correct through a simple structure, avoiding manual inspection, saving a lot of manpower, reducing product production costs, and improving product yield and safety. Attached Figure Description

[0017] Figure 1 This is a front view of the injection mold using this utility model;

[0018] Figure 2 For mold opening Figure 1 Sectional view along line AA;

[0019] Figure 3 For the correct state of the iron parts when the mold is closed Figure 1 Sectional view along line AA;

[0020] Figure 4 for Figure 3 Enlarged view of section B;

[0021] Figure 5 For the incorrect state of the iron parts during mold closing Figure 1 Sectional view along line AA;

[0022] Figure 6 for Figure 5 Enlarged view of section C;

[0023] Figure 7 When the mold is closed, the iron parts are missing. Figure 1 Sectional view along line AA;

[0024] Figure 8 for Figure 5 Enlarged view of section D in the middle;

[0025] Figure 9 This is a schematic diagram of the iron component structure. Detailed Implementation

[0026] Example: A device for preventing incorrect insertion of metal parts in an injection molded plastic part, comprising a fixed mold 1, a moving mold 2, an insert 3, an insert elastic element, an insert position sensing device 5, and an injection molding machine control system. The fixed mold 1 has a mold cavity, within which an insert positioning device is provided. The metal part 4 is able to be stopped and positioned on the insert positioning device. The moving mold has an insert slide, and the insert 3 can be slidably inserted into the insert slide a predetermined distance. The insert elastic element provides an elastic holding force to the insert 3 towards one end of the insert slide, allowing one end of the insert 3 to extend a predetermined distance beyond the outer side of one end of the insert slide. When the mold is closed, the extended end... One end of the insert 3 on the outer side of one end of the insert slide can be tightly abutted against the iron part 4 positioned on the iron part positioning device, and the one end of the insert 3 can be pushed back to the other end of the insert slide due to the obstruction of the iron part 4. The insert position sensing device 5 is fixedly installed in the insert slide. The insert position sensing device 5 can sense the position of the insert 3 in the mold closing state. The insert position sensing device 5 communicates with the injection molding machine control system through wired or wireless means. The injection molding machine control system can determine whether the iron part 4 is missing or incorrectly installed based on the sensing information fed back by the insert position sensing device 5, and control the injection molding machine to start or stop injection and open the mold.

[0027] When using an injection mold to insert the iron part 4 into the mold, the iron part 4 is inserted into the fixed mold cavity of the fixed mold 1. The iron part 4 is positioned and maintained in a stable position by the iron part positioning device. During mold closing, one end of the insert 3 gradually contacts the iron part 4. The other end of the insert 3 is blocked by the iron part 4 and gradually slides back into the insert slide. After the mold is closed, the insert 3 returns to the designed position. The insert position sensing device 5 detects that the insert 3 has returned to the designed position, indicating that no iron part 4 is missing and the specifications of the iron part 4 are correct. Then the injection molding machine control system controls the injection... The injection molding machine begins injection molding; if the iron part 4 is missing from the fixed mold 1, the insert 3 will not be pushed back to the designed position by the iron part 4 when the mold is closed. At this time, it is determined that the iron part 4 is missing or incorrect, and the injection molding machine control system cancels the injection command and controls the mold to open; if the iron part 4 installed in the fixed mold 1 is of incorrect specifications (the diameter of the positioning hole is larger than the diameter of the insert), the insert 3 will be inserted into the positioning hole when the mold is closed. At this time, the position of the insert does not match the designed position, and it is determined that the iron part 4 is incorrect or missing. The injection molding machine control system cancels the injection command and controls the mold to open.

[0028] The above structure enables automatic detection and judgment of whether the iron part 4 implanted in the cavity of the fixed mold 1 is missing or whether its specifications are correct. This avoids the situation where the iron part 4 is missing or the specifications of the iron part 4 are incorrect during injection molding, thereby avoiding defects caused by missing or incorrectly placed iron parts 4. This ensures the yield rate of products injected with iron parts 4, eliminates manual inspection, saves labor, reduces labor costs, and improves the production efficiency of injection molding.

[0029] The insert slide on the moving mold 2 extends along the mold closing direction. The diameter of one end of the insert 3 is between the diameters of the positioning holes 41 on the two different specifications of iron parts 4. The insert 3 is coaxially aligned with the positioning hole 41 on the stop positioning iron part 4 on the iron part positioning device. When the mold is closed, one end of the insert 3 can press against the surface of the iron part 4 with the positioning hole 41 or extend into the positioning hole 41 of the wrong iron part 4.

[0030] The insert 3 can slide along the mold closing direction. In the initial state, one end of the insert 3 extends to a set distance outside the insert slide of the moving mold 2 towards the fixed mold 1 under the action of the insert elastic element. When the mold closes, one end of the insert 3 contacts the surface of the iron part 4 at the position of the positioning hole 41. If the iron part 4 with the small-diameter positioning hole 41 is correct, the insert 3 cannot enter the positioning hole 41 on the iron part 4, and the iron part 4 is correct when it retracts to the last position. If the iron part 4 with the large-diameter positioning hole 41 is correct, one end of the insert 3 can be formed into a T-shaped structure. The diameter of one end of the T-shape is larger than that of the positioning hole 41, and the diameter of the other end of the T-shape is smaller than that of the positioning hole 41. After the smaller diameter end of the insert 3 is inserted into the positioning hole 41, as the mold closing continues, the stepped surface of the T-shaped structure of one end of the insert 3 pushes against the surface of the iron part 4 and retracts. Finally, the insert 3 retracts to the designed position, indicating that the iron part 4 is correct. The structure and size of the insert 3 can be designed according to different specifications of iron parts 4, and the injection molding machine control system can be programmed according to the corresponding judgment conditions.

[0031] The moving mold 2 includes a moving template 21 and a moving mold insert 22. The moving template 21 is provided with an insert positioning groove, and an insert clearance groove 211 is formed on the bottom surface of the insert positioning groove. The insert position sensing device 5 is fixedly installed on the bottom surface or side wall of the insert clearance groove 211. The moving mold insert 22 is fixedly installed in the insert positioning groove by connecting screws. The insert slide is provided on the moving mold insert 22. When the mold is closed, the insert 3 slides towards the insert clearance groove 211 because one end is blocked by the correct iron piece 4, so that the other end of the insert 3 can trigger the insert position sensing device 5 on the bottom surface or side wall of the insert clearance groove 211. The moving mold 2 uses the moving template 21 to embed the moving mold insert 22 to install the insert 3 and the insert position sensing device 5, which is convenient to install and can also replace the insert 3 and the insert position sensing device 5 of different specifications according to the production of different specifications of products.

[0032] The insert slide is a countersunk through hole with an inner diameter at one end smaller than that at the other end. The inner diameter of the insert clearance groove 211 is not smaller than the inner diameter at the other end of the insert slide, and the insert clearance groove 211 is coaxially and directly opposite the insert slide. The insert 3 is a T-shaped column with an outer diameter at one end smaller than that at the other end. The stepped surface between the two ends of the insert 3 stops on the countersunk bottom surface of the insert slide. The sliding distance of the insert 3 is limited and guided by the cooperation between the countersunk through hole and the insert clearance groove 211 on the moving template 21.

[0033] The moving mold insert 22 has an iron part pressing and avoiding groove 221 on one end face. The moving mold insert 22 can press the side of the iron part 4 facing the moving mold 2. The iron part pressing and avoiding groove 221 on one end face of the moving mold insert 22 can accommodate the protruding structure on the iron part 4. The bottom surface of the iron part pressing and avoiding groove 221 can press the surface of the protruding structure on the iron part 4. When the mold is closed, the protruding structure on the iron part 4 will be inserted into the iron part clamping relief groove 221 on the moving mold insert 22. On the one hand, the position of the iron part 4 is automatically aligned with the position of the insert 3. On the other hand, the bottom surface of the iron part clamping relief groove 221 presses against the surface of the protruding structure on the iron part 4, ensuring that the iron part 4 remains in a stable position when the mold is closed, ensuring the accuracy of the test data, and ensuring the precision of the injection molded product. Other clamping structures can also be set on the moving mold 2 to clamp other positions of the iron part 4, ensuring the accurate stop positioning position of the iron part 4 and avoiding deformation or displacement during high-pressure injection molding.

[0034] The insert position sensing device 5 is a contact switch. When the insert 3 slides towards the other end of the insert track to the designed position, the contact switch is triggered. The contact switch is connected in series with the injection molding machine control system to form a conductive circuit. The injection molding machine control system determines the position of the insert 3 based on whether there is current flowing through this conductive circuit. The insert position sensing device 5 can also be a distance sensor, which determines the position of the insert 3 by sensing the distance between itself and the other end of the insert 3. This is an equivalent replacement structure that is easily conceived by those skilled in the art based on this patent and falls within the scope of protection of this patent.

[0035] The iron part positioning device within the mold cavity includes an iron part positioning pin 11. The iron part positioning pin 11 can be inserted into the positioning hole 41 on the iron part 4 to a set depth to achieve horizontal stopping and positioning of the iron part 4. The iron part positioning pin 11, inserted into the positioning hole 41 on the iron part 4, achieves stopping and positioning of the iron part 4 in the vertical mold closing direction. The iron part positioning device also includes a support structure for the iron part 4 in the mold closing direction and a lateral support structure for supporting the outer wall of the iron part 4, etc., as long as it achieves stopping and positioning of the iron part 4 and avoids the injection molding position.

[0036] A fixed mold insert 12 is installed in the fixed mold cavity of the fixed mold 1 via a connector. The fixed mold insert 12 has a countersunk pin hole with an inner diameter smaller than that of the end facing the moving mold 2 than that of the end away from the moving mold 2. The positioning pin is a T-shaped pin. The larger diameter end of the positioning pin can be accommodated in the pin hole at the end away from the moving mold 2, and the larger diameter end of the positioning pin is tightly clamped between the countersunk bottom surface of the countersunk pin hole and the bottom surface of the fixed mold cavity. The smaller diameter end of the positioning pin extends out of the surface of the fixed mold insert 12 by a certain distance through the smaller diameter end of the countersunk pin hole. The fixed mold insert 12 enables the installation, removal, and replacement of the positioning pin to adapt to the positioning of iron parts 4 of different specifications, thus achieving the versatility of the mold.

[0037] The locating pin forms a tapered structure with a gradually narrowing diameter at the end facing the moving mold 2, which facilitates the smooth installation of the iron part 4.

[0038] An alarm device is also provided, which the injection molding machine control system can control to issue an alarm. When the mold is closed, if the injection molding machine control system determines that the implanted iron part 4 is missing or incorrectly installed, the injection molding machine control system will control the alarm device to issue an alarm, so that the workers can deal with it in time.

Claims

1. A device for preventing errors in the insertion of metal parts into a plastic-coated injection mold, characterized in that: The system includes a fixed mold (1), a moving mold (2), an insert (3), an insert elastic element, an insert position sensing device (5), and an injection molding machine control system. The fixed mold has a mold cavity, and an iron part positioning device is provided within the mold cavity. The iron part (4) can be stopped and positioned on the iron part positioning device. The moving mold has an insert slide (23), and the insert can slide a set distance into the insert slide. The insert elastic element provides an elastic holding force to the insert towards one end of the insert slide, allowing one end of the insert to extend a set distance beyond the outside of one end of the insert slide. When the mold is closed, the extended end... One end of the insert on the outer side of one end of the insert slide can be tightly pressed against the iron part positioned on the iron part positioning device, and the insert end can be pushed back towards the other end of the insert slide due to the obstruction of the iron part. The insert position sensing device is fixedly installed in the insert slide. The insert position sensing device can sense the position of the insert in the mold closing state. The insert position sensing device communicates with the injection molding machine control system through wired or wireless means. The injection molding machine control system can determine whether the iron part is missing or incorrectly installed based on the sensing information fed back by the insert position sensing device, and control the injection molding machine to start or stop injection and open the mold.

2. The anti-misalignment device for inserting metal parts into injection molded parts according to claim 1, characterized in that: The insert slide on the moving mold extends along the mold closing direction. The diameter of one end of the insert is between the diameters of the positioning holes (41) on two different specifications of iron parts. The insert is coaxial with the positioning hole on the stop positioning iron part of the iron part positioning device. When the mold is closed, one end of the insert can press against the surface of the iron part with the positioning hole or extend into the positioning hole of the wrong iron part.

3. The anti-misalignment device for inserting metal parts into injection molded parts according to claim 1 or 2, characterized in that: The moving mold includes a moving template (21) and a moving mold insert (22). The moving template is provided with an insert positioning groove. An insert clearance groove (211) is formed on the bottom surface of the insert positioning groove. An insert position sensing device is fixedly installed on the bottom surface or side wall of the insert clearance groove. The moving mold insert is fixedly installed in the insert positioning groove by connecting screws. The insert slide is provided on the moving mold insert. When the mold is closed, the insert slides towards the insert clearance groove because one end is blocked by the correct iron part, so that the other end of the insert can trigger the insert position sensing device on the bottom surface or side wall of the insert clearance groove.

4. The anti-misalignment device for inserting iron parts into injection molded parts according to claim 3, characterized in that: The insert slide is a countersunk through hole with an inner diameter at one end smaller than that at the other end. The inner diameter of the insert clearance groove is not smaller than the inner diameter at the other end of the insert slide, and the insert clearance groove and the insert slide are coaxially and directly opposite each other. The insert is a T-shaped column with an outer diameter at one end smaller than that at the other end. The stepped surface between the two ends of the insert stops on the countersunk bottom surface of the insert slide.

5. The anti-misalignment device for inserting metal parts into injection molded parts according to claim 3, characterized in that: The moving mold insert has an iron part pressing and relief groove (221) on one end face. The moving mold insert can press the iron part on one side facing the moving mold direction. The iron part pressing and relief groove on the moving mold insert can accommodate the protruding structure on the iron part. The bottom surface of the iron part pressing and relief groove can press the surface of the protruding structure on the iron part.

6. The anti-misalignment device for inserting iron parts into injection molded parts according to claim 3, characterized in that: The insert position sensing device is a contact switch. When the insert slides to the designed position in the direction of the other end of the insert slide, the contact switch can be triggered. The contact switch is connected in series with the injection molding machine control system to form a conductive circuit. The injection molding machine control system determines the insert position based on whether there is current flowing through the conductive circuit.

7. The anti-misalignment device for inserting iron parts into injection molded parts according to claim 2, characterized in that: The iron part positioning device in the fixed mold cavity includes an iron part positioning pin (11), which can be inserted into the positioning hole on the iron part to a set depth to achieve the stop positioning of the iron part in the horizontal direction.

8. The anti-misalignment device for inserting metal parts into injection molded parts according to claim 7, characterized in that: A fixed mold insert (12) is installed in the fixed mold cavity through a connector. The fixed mold insert has a countersunk pin hole with an inner diameter smaller than that of the moving mold end. The positioning pin is a T-shaped pin. The larger diameter end of the positioning pin can be accommodated in the pin hole at the end away from the moving mold. The larger diameter end of the positioning pin is tightly clamped between the countersunk bottom surface of the countersunk pin hole and the bottom surface of the fixed mold cavity. The smaller diameter end of the positioning pin extends out of the surface of the fixed mold insert by a set distance through the smaller diameter end of the countersunk pin hole.

9. The anti-misalignment device for inserting metal parts into injection molded parts according to claim 7, characterized in that: The locating pin forms a tapered structure with a gradually decreasing diameter at the end facing the moving mold.

10. The anti-misalignment device for inserting metal parts into injection molded parts according to claim 1, characterized in that: It is also equipped with an alarm device, which the injection molding machine control system can control to issue an alarm.

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