Insert molding to prevent missing structure
By installing the induction device and injection molding machine control system on the injection molding male mold, automatic induction and correct placement of inserts are solved, the problem of leaking inserts during injection molding is improved, product yield and safety are reduced, and production costs are reduced .
Patent Information
- Application Number
- CN202010565227.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2020-06-19
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2040-06-19
AI Technical Summary
During the injection molding process, the metal parts embedded in the plastic parts are prone to leak, resulting in poor product, requiring a lot of manual time and effort to select, and the leaking of the inserts may lead to the risk of use.
An insert injection molding prevents leakage from inserts is designed, including installing an induction device and an injection molding machine control system on the injection molding male mold. The induction device senses the insert position through the trigger mechanism to control the injection molding machine to start or stop to ensure the insert is placed correctly.
It effectively prevents the inserts from leaking during injection molding, improves product yield and use safety, reduces labor costs, and avoids the need for later manual inspections.
Smart Images
Figure CN111761798B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to an injection mold, in particular to an insert injection molding missing prevention structure. Background Art
[0002] Many products have plastic parts embedded with metal parts, such as nuts. These products are all molded by injection molding. During injection molding production, inserts are often missed. Products molded by the injection molding machine do not have inserts, resulting in defective products. Later, a lot of time and effort are required to manually select them. If there are products without inserts that are not selected during the selection process, there will be risks during use. Summary of the invention
[0003] In order to overcome the above-mentioned defects, the present invention provides an insert injection molding missing prevention structure, which can effectively prevent the insertion of inserts during in-mold injection molding processing, thereby improving the product yield and safety of use and reducing labor costs.
[0004] The technical solution adopted by the present invention to solve its technical problems is: an insert injection molding missing prevention structure, including a sensing device fixedly mounted on the injection molding male mold and an injection molding machine control system, the sensing device is provided with a trigger mechanism, the trigger mechanism extends into the mold cavity of the injection molding male mold, and the insert placed in the mold cavity of the injection molding male mold can trigger the trigger mechanism, the sensing device communicates with the injection molding machine control system, and the injection molding machine control system controls the injection molding machine to start or stop injection molding.
[0005] As a further improvement of the present invention, the trigger mechanism on the sensing device includes a movable insert and an elastic member. The movable insert can be slidably inserted into the injection mold, one end of the movable insert can just extend into the cavity of the mold core of the male mold, the insert can tightly abut against the end surface of one end of the movable insert, the sensing device can sense the position of the movable insert, and the elastic member provides an upward elastic retaining force to the movable insert.
[0006] As a further improvement of the present invention, a mother mold insert is provided, which is fixedly mounted on the injection mother mold. The mother mold insert can be inserted into the cavity of the injection male mold to a set depth, and the end face of the mother mold insert can tightly abut against an end face of the insert facing away from the movable insert.
[0007] As a further improvement of the present invention, the sensing device is a micro switch, and the other end of the movable insert can press against a trigger spring that triggers the micro switch.
[0008] As a further improvement of the present invention, a slot matching the shape of the micro switch is formed on the injection mold, the micro switch is inserted into the slot, the side wall of the micro switch is fixedly connected to the slot through a connecting piece, and a slideway connecting the slot and the cavity is also provided on the injection mold, and a movable insert can be slidably inserted into the slideway.
[0009] As a further improvement of the present invention, the slide is a "Z"-shaped structure, and a radially outward-expanding limit ring is formed in the middle of the movable insert. The limit ring can be slidably inserted in the middle diameter increase section of the slide, and the elastic member is also inserted in the middle diameter increase section of the slide, and one end of the elastic member is tightly against the end surface of the movable insert limit ring facing away from the insert, and the other end of the elastic member is tightly against the step surface of the middle diameter increase section of the slide away from the insert.
[0010] As a further improvement of the present invention, a mold core mounting groove is formed at one end of the injection male mold, a male mold core is fixedly installed in the mold core mounting groove, the cavity is located on the male mold core, a first slideway with a diameter at one end smaller than the diameter at the other end is formed on the male mold core, a second slideway with a diameter at one end larger than the diameter at the other end is formed in the injection male mold, the second slideway is directly connected to the large diameter end of the first slideway, and the diameter of one end of the second slideway is smaller than the diameter of the other end of the first slideway, the limiting ring of the movable insert can be slidably inserted in the other end of the first slideway, and the other end face of the limiting ring of the movable insert is stopped on the bottom surface of the mold core mounting groove on the injection male mold.
[0011] As a further improvement of the present invention, a conical positioning platform with a smaller diameter than the other end is formed at one end of the movable insert, and the conical positioning platform can be inserted into the slot of the insert, and one end of the conical positioning platform is tightly against the bottom surface of the insert slot.
[0012] As a further improvement of the present invention, a connection surface is formed at one end of the movable insert and can be aligned and connected with the bottom surface of the cavity of the injection mold.
[0013] As a further improvement of the present invention, an alarm device is further provided, and the injection molding machine control system can control the alarm device to sound an alarm.
[0014] The beneficial effects of the present invention are as follows: the present invention arranges a sensing device in the injection mold, and triggers a trigger mechanism extending into the cavity of the injection mold through an insert, so that the sensing device sends a sensing signal, thereby realizing normal injection molding of the injection molding machine, otherwise the injection molding machine cannot perform injection molding. The trigger mechanism of the sensing device further utilizes a movable insert slidably inserted in the injection mold to trigger the micro switch trigger spring while supporting and positioning the insert, and drives the movable insert to slide while pressing the insert into place through the female mold insert. The present invention has a simple structure and a clever design, and fully utilizes the structure of the insert injection mold itself to realize automatic sensing of the insert, fully avoiding the occurrence of missing inserts during in-mold injection molding of the insert, improving product yield and safety of use, eliminating the need for later manual inspection, saving a lot of labor, and reducing the production cost of the product. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is a schematic diagram of the state of the missing insert in the injection mold;
[0016] Figure 2 This is a schematic diagram of the state of installing the insert in the injection mold. DETAILED DESCRIPTION
[0017] Embodiment: An insert injection molding missing prevention structure comprises a sensing device fixedly mounted on an injection molding male mold 1 and an injection molding machine control system, wherein the sensing device is provided with a trigger mechanism, which extends into a cavity 2 of the injection molding male mold, and an insert 3 placed in the cavity of the injection molding male mold 1 can trigger the trigger mechanism, the sensing device communicates with the injection molding machine control system, and the injection molding machine control system controls the injection molding machine to start or stop injection molding. When the injection mold is used to perform mold insert molding 3, after the insert 3 is loaded into the cavity 2 of the injection mold, the insert 3 will trigger the trigger mechanism of the sensing device, and the sensing device will send the sensing signal to the injection molding machine control system, and the injection molding machine control system will control the injection molding machine to start injection molding. If the insert 3 is missing from the cavity 2 of the injection mold, the trigger mechanism on the sensing device cannot be triggered, and the injection molding machine control system cannot obtain the signal sent by the sensing device, then the injection molding machine will not receive the start signal and cannot perform injection molding. The above structure realizes automatic sensing of the insert 3 in the cavity 2 of the injection mold, thereby avoiding the situation where the insert 3 is missing during injection molding of the in-mold insert 3, thereby avoiding the occurrence of product defects caused by missing insert 3, and ensuring the product molding quality.
[0018] The trigger mechanism on the sensing device includes a movable insert 4 and an elastic member 5. The movable insert 4 can be slidably inserted into the injection mold 1. One end of the movable insert 4 can just extend into the cavity of the mold core of the mold. The insert 3 can press against the end surface of one end of the movable insert 4. The sensing device can sense the position of the movable insert 4. The elastic member 5 provides an upward elastic holding force for the movable insert 4. When the mold is closed, the insert 3 is placed. The insert 3 presses against one end of the movable insert 4. The movable insert 4 is subjected to pressure to overcome the elastic member 5 and slides toward the other end. The sensing device senses that the movable insert 4 has moved into place and communicates with the injection molding machine control system. If the insert 3 is not placed when the mold is closed, the movable insert 4 will maintain a stable position under the elastic force of the elastic member 5 and will not slide. The sensing device cannot sense the descent of the movable insert 4, that is, it cannot send a signal to the injection molding machine control system.
[0019] A female mold insert 6 is also provided, and the female mold insert 6 is fixedly mounted on the injection female mold. The female mold insert 6 can be inserted into the mold cavity 2 of the injection male mold to a set depth, and the end face of the female mold insert 6 can be tightly against one end face of the insert 3 facing away from the movable insert 4. When the mold is closed, the insert 3 is placed, and the insert 3 is tightly against one end of the movable insert 4. The female mold insert 6 is inserted into the male mold cavity, and the female mold insert 6 pushes the insert 3 in the direction of the movable insert 4, thereby driving the movable insert 4 to overcome the elastic force of the elastic member 5 and move toward the other end. The sensing device is triggered to send a signal to the injection molding machine control system. Otherwise, if there is no insert 3 in the mold cavity, when the mold is closed, there is a gap formed between the female mold insert 6 and one end of the movable insert 4 due to the lack of the insert 3, and the movable insert 4 will not move, the sensing device will not be triggered, and the injection molding machine control system will not start the injection molding function.
[0020] The sensing device is a micro switch 7, and the other end of the movable insert 4 can press against the trigger spring of the micro switch 7. When the movable insert 4 slides toward the other end, the trigger spring of the micro switch 7 will be triggered, and the state of the micro switch 7 will be activated. The micro switch 7 is connected with the injection molding machine signal to control the injection molding machine to inject normally. Otherwise, the micro switch 7 will not be activated, and the injection molding machine cannot inject normally. In addition to the micro switch 7, the sensing device can also be other sensing devices, such as displacement sensors, photoelectric switches, etc. This is an equivalent replacement structure that can be easily thought of by technical personnel based on this patent, and it belongs to the protection scope of this patent.
[0021] The injection mold 1 is provided with a slot 11 matching the shape of the micro switch 7, the micro switch 7 is inserted into the slot 11, the side wall of the micro switch 7 is fixedly connected to the slot 11 through a connector, and the injection mold 1 is also provided with a slideway connecting the slot 11 with the cavity, and the movable insert 4 can be slidably inserted into the slideway. By forming the slot 11 on the injection mold 1 to position the micro switch 7, the micro switch 7 is protected to avoid damage or mis-triggering of the micro switch 7 during the production process.
[0022] The slideway is a "Z"-shaped structure, and a radially outward-expanding limiting ring 8 is formed in the middle of the movable insert 4. The limiting ring 8 can be slidably inserted in the middle diameter-enlarged section of the slideway. The elastic member 5 is also inserted in the middle diameter-enlarged section of the slideway, and one end of the elastic member 5 is tightly pressed against the end surface of the limiting ring 8 of the movable insert 4 facing away from the insert 3, and the other end of the elastic member 5 is tightly pressed against the step surface of the middle diameter-enlarged section of the slideway away from the insert 3. By forming a diameter-outward-expanding structure in the middle of the slideway, a diameter-outward-expanding structure is also formed in the middle of the movable insert 4, thereby limiting the sliding distance of the movable insert 4. The elastic member 5 is pressed against the limiting ring 8 of the movable insert 4, so that the movable insert 4 automatically resets and disengages from the triggering of the sensing device after losing the pressure of the insert 3.
[0023] A core installation groove is formed at one end of the injection mold 1, and a core 9 is fixedly installed in the core installation groove. The cavity is located on the core 9. A first slideway with a diameter at one end smaller than the diameter at the other end is formed on the core 9. A second slideway with a diameter at one end larger than the diameter at the other end is formed in the injection mold 1. The second slideway is directly connected to the large diameter end of the first slideway, and the diameter of one end of the second slideway is smaller than the diameter of the other end of the first slideway. The limit ring 8 of the movable insert 4 can be slidably inserted into the other end of the first slideway, and the other end face of the limit ring 8 of the movable insert 4 is stopped on the bottom surface of the core installation groove on the injection mold 1. By dividing the slideway into two-section structures and arranging them on the injection mold 1 and the core 9 respectively, the processing of its "middle" shaped structure can be facilitated. At the same time, a step surface that limits the sliding distance of the limit ring 8 of the movable insert 4 is formed by the diameter difference between the large diameter ends of the first slideway and the second slideway.
[0024] A conical positioning platform 10 with a smaller diameter than the other end is formed at one end of the movable insert 4, and the conical positioning platform 10 can be inserted into the slot 11 of the insert 3, and one end of the conical positioning platform 10 is tightly against the bottom surface of the slot 11 of the insert 3. The conical positioning platform 10 can realize automatic positioning when the insert 3 is loaded into the cavity, improve the position accuracy of the insert 3 during the injection molding, and the conical positioning platform 10 can be smoothly separated from the product after the injection molding is completed.
[0025] One end of the movable insert 4 is formed with a connection surface that can be aligned and connected with the bottom surface of the cavity 2 of the injection mold, so that the surface of the product after molding is smooth and beautiful without obvious connection platform.
[0026] An alarm device is also provided, and the injection molding machine control system can control the alarm device to sound an alarm. When the sensing device cannot sense the insert 3 after the mold is closed, the injection molding machine control system controls the alarm device to sound an alarm of missing insert 3, so that the worker can open the mold in time to load the insert 3 for production.
Claims
1. An insert injection molding leak prevention structure, characterized in that: The invention comprises a sensing device fixedly mounted on a male injection mold (1) and an injection molding machine control system, wherein the sensing device is provided with a trigger mechanism, the trigger mechanism extends into a mold cavity (2) of the male injection mold, and an insert (3) placed in the mold cavity of the male injection mold can trigger the trigger mechanism, the sensing device communicates with the injection molding machine control system, and the injection molding machine control system controls the injection molding machine to start or stop injection molding, the trigger mechanism on the sensing device comprises a movable insert (4) and an elastic member (5), the movable insert can be slidably inserted into the male injection mold, one end of the movable insert can just extend into the mold cavity of the male mold core, and the insert (3) can be inserted into the mold cavity of the male mold core. The movable insert can be tightly pressed against the end surface of one end of the movable insert, the sensing device can sense the position of the movable insert, the elastic member provides an upward elastic holding force for the movable insert, and a female mold insert (6) is also provided. The female mold insert is fixedly mounted on the injection female mold. The female mold insert can be inserted into the cavity of the injection male mold to a set depth. The end surface of the female mold insert can be tightly pressed against the end surface of the insert facing away from the movable insert. The sensing device is a micro switch (7). The other end of the movable insert can press against a trigger spring that triggers the micro switch. A slot (11) matching the shape of the micro switch is formed on the injection male mold. The micro switch is inserted into the In the slot (11), the side wall of the micro switch is fixedly connected to the slot (11) via a connecting piece. The injection mold is also provided with a slideway that connects the slot (11) with the mold cavity. The movable insert can be slidably inserted into the slideway. The slideway is a "Z"-shaped structure. A radially outwardly expanded limit ring (8) is formed in the middle of the movable insert. The limit ring can be slidably inserted into the middle diameter enlarged section of the slideway. The elastic member is also inserted into the middle diameter enlarged section of the slideway. One end of the elastic member is tightly against the end surface of the movable insert limit ring facing away from the insert. The other end of the elastic member is tightly against the middle diameter enlarged section of the slideway away from the insert. A mold core installation groove is formed on a step surface at one end of the injection male mold, a male mold core (9) is fixedly installed in the mold core installation groove, the cavity is located on the male mold core, a first slideway is formed on the male mold core, the diameter of one end is smaller than the diameter of the other end, a second slideway is formed in the injection male mold, the second slideway is directly connected to the large diameter end of the first slideway, and the diameter of one end of the second slideway is smaller than the diameter of the other end of the first slideway, the limit ring of the movable insert can be slidably inserted into the other end of the first slideway, and the other end surface of the limit ring of the movable insert is stopped on the bottom surface of the mold core installation groove on the injection male mold.
2. The insert injection molding missing prevention structure according to claim 1, characterized in that: A conical positioning platform (10) having a smaller diameter at one end than at the other end is formed at one end of the movable insert, and the conical positioning platform can be inserted into the slot of the insert, and one end of the conical positioning platform is tightly against the bottom surface of the insert slot.
3. The structure for preventing missing parts during insert molding according to claim 2, characterized in that: One end of the movable insert is formed with a connection surface which can be aligned and connected with the bottom surface of the cavity of the injection mold.
4. The structure for preventing missing parts during insert molding according to claim 1, characterized in that: An alarm device is also provided, and the injection molding machine control system can control the alarm device to sound an alarm.