Intelligent auxiliary forming mechanism for insert type product of mold

Abstract

The application provides a kind of insert product intelligent auxiliary forming mechanism of mould, belongs to intelligent mould technical field.It solves the problem that existing insert and hole position produce card stagnation, not easy to demould.The insert product intelligent auxiliary forming mechanism of mould, mould includes fixed mould and movable mould, fixed mould and movable mould can form cavity when closing mould, auxiliary forming mechanism includes installation hole on the side surface of cavity, iron core column is fixedly inserted in installation hole, one end of the iron core column towards cavity is positioning end, electromagnetic coil is also spirally wound on the iron core column, guide hole is opened in the iron core column, top rod and iron core sleeve are slidably arranged in the guide hole, and elastic member is arranged between the iron core sleeve and the top rod.The insert product intelligent auxiliary forming mechanism of the mould can make product demoulding more convenient on the basis of ensuring stable positioning of insert.

Description

Technical Field

[0001] The present invention belongs to the technical field of intelligent molds and relates to an intelligent auxiliary molding mechanism for insert products of a mold. Background Art

[0002] Injection molding, also known as injection molding, is a combined injection and molding process that offers high production speed, high efficiency, and automated operation, making it suitable for mass production and complex-shaped products. At a certain temperature, a screw stirs completely molten plastic material, which is then injected into the mold cavity at high pressure. After cooling and solidification, the resulting molded product is obtained. Injection molded products are usually plastic parts, but if metal inserts are fixed on the product, such inserts need to be placed in the mold cavity in advance, and then molten plastic is injected into the mold cavity so that the plastic is directly fixed to the insert after solidification. Since the molten plastic has a large impact force when injected into the mold cavity, it will cause the insert to shift, etc. Therefore, it is necessary to set a fixed structure for fixing the insert, such as the anti-deviation high-precision plastic mold disclosed in the patent document (application number: 202022447658.0), including a pressure plate, an adjustment base is fixedly installed on the bottom surface of the pressure plate, and a guide slide is embedded in the bottom surface of the groove of the adjustment base, and the internal movability of the guide slide is equipped with an electromagnetic positioning clip movably connected to the bottom surface of the pressure plate, and a plastic die seat is fixedly installed in the middle of the top surface of the pressure plate, and the inner cavity of the plastic die seat is detachably equipped with a built-in insert. Several electromagnets inside the insulating base are energized simultaneously to generate strong magnetic force, which uses the strong magnetic force to attract the magnetic positioning plate and firmly fix the insert body to the bottom surface of the inner cavity of the plastic die base, thereby avoiding the problem of the insert being squeezed by the plastic raw material and displaced during the plastic injection molding process.

[0003] The structure of the above inserts is relatively regular and the overall shape is blocky. However, if the inserts are bolts, pins, etc., Figure 1 The product 10 is fixed with a columnar metal insert 101, so the insert 101 needs to be placed in the cavity in advance. In order to fix the columnar insert 101, a hole for accommodating the insert needs to be set in the cavity in advance. In order to ensure the positioning accuracy of the insert, the hole diameter is adapted to the outer diameter of the insert. However, when demolding, the product is pushed out of the cavity by the ejector pin. At this time, if the insert is subjected to a force inclined to its axial direction, it is easy to get stuck with the hole, making it difficult to demold. Summary of the Invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the existing technology and propose an intelligent auxiliary molding mechanism for insert products of the mold. The intelligent auxiliary molding mechanism for insert products of the mold can make product demoulding more convenient while ensuring the stable positioning of the insert.

[0005] The objectives of the present invention can be achieved through the following technical solutions: an intelligent auxiliary molding mechanism for insert products of a mold, the mold includes a fixed mold and a movable mold, and a cavity can be formed when the fixed mold and the movable mold are closed. It is characterized in that the auxiliary molding mechanism includes a mounting hole opened on the side of the cavity and used for inserting the insert, an iron core column is fixedly inserted in the mounting hole, and the end of the iron core column facing the cavity is the positioning end, and an electromagnetic coil is also spirally wound on the iron core column, and a guide hole is axially opened in the iron core column and penetrates to the end face of the positioning end, and a push rod and an iron core sleeve are slidably arranged in the guide hole, and an elastic member is provided between the iron core sleeve and the push rod, which can push the push rod and make the end of the push rod extend out of the end face of the positioning end when the iron core sleeve moves toward the positioning end.

[0006] The insert is usually a cylindrical metal part, such as a bolt. The aperture of the mounting hole is designed to adapt to the outer diameter of the insert. During injection molding, the insert is pre-inserted from the mounting hole of the cavity. Since an iron core column is fixedly inserted in the mounting hole, the inserted end of the insert can be supported on the iron core column. At this time, the electromagnetic coil is energized and spirally wrapped around the iron core column, causing the iron core column to generate magnetism and absorb the insert, thereby ensuring that the insert remains stable during the injection molding process and can ensure posture accuracy even when encountering the impact of molten plastic. When demolding is required after injection molding is completed, since the insert is adapted to the mounting hole, if the mounting hole is pulled out only under the drive of the product, it is easy for the insert and the mounting hole to get stuck. For this reason, a push rod is set in the guide hole of the core column to push the insert outward to assist in product demolding. Furthermore, since the product is ejected from the cavity by the ejector pin, the ejector pin is controlled by a driving mechanism such as a needle plate, and the ejector pin is controlled by the magnetic field of the electromagnetic coil. The synchronization between the two is difficult to ensure. For this reason, an iron core sleeve and an elastic member are set. When demolding is required, the electromagnetic coil is reversed in advance, the magnetic attraction of the iron core column disappears, and a reverse repulsion is generated. At the same time, a magnetic thrust is generated on the iron core sleeve toward the positioning end. At this time, the product is still adsorbed in the cavity, and the ejector pin is against the insert and difficult to move. Therefore, the core sleeve can compress the elastic member to store force, so that the insert is always subjected to an outward thrust. When the product is pushed by the ejector pin for demolding, the ejector pin assists in pushing the insert, so that the insert is synchronously and smoothly separated from the mounting hole, ensuring the convenience of product demolding and ensuring product quality.

[0007] In the aforementioned intelligent auxiliary molding mechanism for insert-type products in the mold, the elastic member includes a push spring, an annular baffle is fixed to the inner wall of the core sleeve, and an annular abutment ridge is circumferentially provided on the outer wall of the ejector rod. The ejector rod slides through the core sleeve, and the abutment ridge is located between the annular baffle and the positioning end. The push spring is disposed within the core sleeve and sleeved on the ejector rod, with one end of the push spring abutting against the annular baffle and the other end abutting against the abutment ridge. When the electromagnetic coil is reversely energized, the magnetic field generated by the electromagnetic coil pushes the core sleeve toward the positioning end, and the annular baffle compresses the push spring to accumulate force, thereby allowing the ejector rod to consistently exert a predetermined push force on the insert prior to demolding, assisting in the ejection of the insert from the mounting hole.

[0008] In the above-mentioned intelligent auxiliary molding mechanism for insert products of the mold, the guide hole includes a guide section and a through section. The aperture of the through section is smaller than that of the guide section, and the outer end opening of the through section extends to the end face of the positioning end. The core sleeve is located within the guide section, and the outer wall of the core sleeve slides with the hole wall of the guide section. The outer wall of the inner end of the ejector pin slides with the inner hole wall of the annular baffle, and the outer wall of the outer end of the ejector pin slides with the hole wall of the through section. The guide section guides the core sleeve, so that the core sleeve remains stable, while the annular baffle of the core sleeve guides the inner end of the ejector pin, and the through section guides the outer end of the ejector pin, so that the ejector pin remains stable during the stress process, thereby allowing the insert to be demolded under axial stress to avoid sticking.

[0009] In the aforementioned intelligent assisted molding mechanism for mold inserts, a plug is threaded onto the end of the guide hole away from the positioning end. A return spring is also provided within the guide section of the guide hole. This return spring is located between the core sleeve and the positioning end, with one end of the return spring resting against the core sleeve and the other end resting against the bottom surface of the guide section. Under the action of the return spring, the core sleeve rests against the inner end surface of the plug. The return spring is used to reset the core sleeve when the electromagnetic coil is de-energized, thereby causing the ejector pin to reset and retract into the mounting hole. When the electromagnetic coil is energized in the forward direction, the core column generates magnetic attraction on the insert, while the core sleeve rests against the plug to maintain stability.

[0010] In the aforementioned intelligent assisted molding mechanism for insert-type products in a mold, an annular stopper is formed on the inner wall of the core sleeve near the positioning end. The end of the return spring extends into the core sleeve and abuts against the stopper. The return spring extends into the core sleeve and abuts against the stopper. When the electromagnetic coil is reversely energized, the core sleeve compresses the return spring, causing it to move. This compressed return spring is then positioned within the core sleeve, allowing the end face of the core sleeve to abut against the bottom surface of the guide section, ensuring the core sleeve's stability.

[0011] In the aforementioned intelligent assisted molding mechanism for insert-type products in the mold, the outer edge of the abutting ridge slides with the inner circumference of the core sleeve, and the outer circumference of the ejector pin slides with the inner circumference of the limiter. Under the action of the push spring, the abutting ridge abuts against the limiter. The ejector pin is the component that receives force and pushes the insert, so it is guided at multiple points: the annular baffle guides the inner end of the ejector pin, the core sleeve guides the abutting ridge, the limiter guides the middle portion of the ejector pin, and the through-section guides the outer end of the ejector pin, thereby maintaining the ejector pin's stability.

[0012] In the aforementioned intelligent assisted molding mechanism for mold inserts, the mounting hole is provided in the movable mold and comprises a positioning section for inserting the insert and a mounting section. The positioning section has a smaller diameter than the mounting section and extends through the side of the mold cavity. The core column is secured within the mounting section. The mounting section has a larger diameter and is used to mount components such as the core column, while the positioning section maintains the position of the insert.

[0013] In the aforementioned intelligent assisted molding mechanism for insert-type products, the core leg has an annular fixed flange around its locating end. The outer circumference of the fixed flange is threadedly connected to the hole wall of the mounting section, forming a mounting gap between the outer circumference of the core leg and the hole wall of the mounting section. The electromagnetic coil is positioned within the mounting gap. Because the fixed flange is threadedly connected to the mounting section, the core leg's position, and therefore the depth of the core leg's locating end, can be adjusted by rotating the core leg to accommodate inserts of varying lengths.

[0014] In the aforementioned intelligent assisted molding mechanism for insert-type molds, a positioning hole is formed radially inwardly of the fixed lip. This positioning hole is coaxially located with the positioning segment of the mounting hole and has the same diameter as the positioning segment. The end surface of the positioning end serves as the bottom surface of the positioning hole. Adjusting the core column allows the position of the positioning hole to be adjusted, thereby accommodating inserts of varying lengths.

[0015] In the above-mentioned intelligent auxiliary molding mechanism for insert products of the mold, a fixing plate is fixed to the outer surface of the movable mold, which covers the outer end of the mounting hole, so that the core column and other components in the mounting hole remain stable.

[0016] Compared with the existing technology, the intelligent auxiliary molding mechanism of the insert products of this mold has the following advantages:

[0017] 1. Since an iron core column is fixedly inserted into the mounting hole, the electromagnetic coil is spirally wound around the iron core column, which makes the iron core column magnetic and absorbs the insert, thereby ensuring that the insert remains stable during the injection molding process and can maintain posture accuracy even when encountering the impact of molten plastic.

[0018] 2. Due to the provision of the core sleeve and the elastic member, when demoulding is required, the electromagnetic coil is energized in reverse in advance, generating a magnetic thrust toward the positioning end of the core sleeve. The ejector pin rests against the insert and is difficult to move. Therefore, the core sleeve can compress the elastic member to store force, so that the insert is always subjected to an outward thrust. When the product is demoulded by the ejector pin, the ejector pin assists in pushing the insert, so that the insert is synchronously and smoothly separated from the mounting hole, ensuring the convenience of product demoulding and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of a product with an insert.

[0020] Figure 2 It is a structural cross-sectional view of this mold.

[0021] Figure 3 yes Figure 2 A magnified view of the structure at point A.

[0022] Figure 4 It is a cross-sectional view of the structure when the insert in the mold is adsorbed.

[0023] Figure 5 This is a cross-sectional view of the structure when the ejector spring in the mold is compressed and stores force.

[0024] Figure 6 It is a structural cross-sectional view of the product when it is ejected after the mold is opened.

[0025] In the figure, 1. fixed mold; 2. movable mold; 21. mounting hole; 211. positioning section; 212. mounting section; 22. mounting gap; 23. fixing plate; 231. screw; 3. cavity; 4. core column; 41. positioning end; 42. guide hole; 421. guide section; 422. through section; 43. fixing ridge; 44. positioning hole; 45. plug; 5. electromagnetic coil; 6. ejector pin; 61. abutting ridge; 7. core sleeve; 71. annular baffle; 72. limiting part; 8. elastic member; 81. push spring; 9. return spring; 10. product; 101. insert. DETAILED DESCRIPTION

[0026] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0027] like Figure 2 、 Figure 3As shown, an intelligent auxiliary molding mechanism for insert products of a mold, the mold includes a fixed mold 1 and a movable mold 2. When the fixed mold 1 and the movable mold 2 are closed, a cavity 3 can be formed. The auxiliary molding mechanism includes a mounting hole 21 opened on the side of the cavity 3 of the movable mold 2. The outer end of the mounting hole 21 passes through the outer side of the movable mold 2. The mounting hole 21 includes a positioning section 211 with a smaller aperture and a mounting section 212 with a larger aperture. That is, the aperture of the mounting section 212 is three times the aperture of the positioning section 211. One end of the positioning section 211 passes through the side of the cavity 3, and the other end passes through the bottom surface of the mounting section 212. The insert 101 is a cylindrical metal part, and the positioning section 211 is used for axial insertion of the insert 101 during injection molding. The iron core column 4 is fixedly inserted in the mounting section 212. The end of the iron core column 4 facing the cavity 3 is the positioning end 41, that is, the end face of the positioning end 41 of the iron core column 4 faces the opening of the positioning section 211 of the mounting hole 21. When the insert 101 is inserted into the positioning section 211, it can rest on the end face of the positioning end 41 of the iron core column 4. An electromagnetic coil 5 is spirally wound on the iron core column 4. When the electromagnetic coil 5 is energized in the forward direction, it can generate magnetic attraction on the iron core column 4 to adsorb the positioning insert 101. A guide hole 42 is axially opened in the core column 4 and penetrates to the end face of the positioning end 41. A push rod 6 and a core sleeve 7 are slidably arranged in the guide hole 42. An elastic member 8 is provided between the core sleeve 7 and the push rod 6. When the electromagnetic coil 5 is reversely energized, a magnetic thrust is generated on the core sleeve 7 toward the positioning end 41. The core sleeve 7 moves and compresses the elastic member 8, so that the push rod 6 generates a push force on the insert 101, which assists the insert 101 to separate from the mounting hole 21 when the product 10 is demolded.

[0028] Specifically, the guide hole 42 includes a guide section 421 and a through section 422. The aperture of the through section 422 is smaller than that of the guide section 421, and the outer end opening of the through section 422 penetrates to the end surface of the positioning end 41. The core sleeve 7 is slidably arranged in the guide section 421, and the outer wall of the core sleeve 7 is slidably matched with the hole wall of the guide section 421. The elastic member 8 includes a push spring 81. The inner wall of the core sleeve 7 is respectively provided with an annular baffle 71 and an annular limiting portion 72. The limiting portion 72 is closer to the positioning end 41 than the annular baffle 71. The outer wall of the push rod 6 is provided with an annular abutting ridge 61 on the circumference, and the push rod 6 slides. The movable thread is arranged in the iron core sleeve 7, and the abutting ridge 61 is located between the annular baffle 71 and the limiting portion 72. The outer wall of the inner end of the push rod 6 slides with the inner hole wall of the annular baffle 71, and the outer edge of the abutting ridge 61 slides with the inner circumference of the iron core sleeve 7. The outer circumference of the push rod 6 slides with the inner circumference of the limiting portion 72 and the hole wall of the through section 422 respectively. The pushing spring 81 is arranged in the iron core sleeve 7 and sleeved on the push rod 6, and one end of the pushing spring 81 abuts on the annular baffle 71, and the other end abuts on the abutting ridge 61. Under the action of the pushing spring 81, the abutting ridge 61 abuts on the limiting portion 72. A plug 45 is threadedly connected to the end of the guide hole 42 away from the positioning end 41. A return spring 9 is also provided within the guide section 421 of the guide hole 42. This return spring 9 is located between the limiting portion 72 and the positioning end 41. One end of this return spring 9 extends into the core sleeve 7 and abuts against the limiting portion 72, while the other end abuts against the bottom surface of the guide section 421. Under the action of the return spring 9, the core sleeve 7 abuts against the inner end surface of the plug 45. The positioning end 41 of the core column 4 is circumferentially provided with an annular fixing flange 43. The outer circumference of the fixing flange 43 is fixedly connected to the hole wall of the mounting section 212 via a threaded connection. The outer diameter of the core column 4 is smaller than the hole diameter of the mounting section 212 of the mounting hole 21. A mounting gap 22 is formed between the outer circumference of the core column 4 and the hole wall of the mounting section 212. The electromagnetic coil 5 is located within the mounting gap 22. A positioning hole 44 is formed radially inwardly of the fixed protrusion 43. This positioning hole 44 is coaxially arranged with the positioning section 211 of the mounting hole 21 and has the same diameter as the positioning section 211. The end surface of the positioning end 41 serves as the bottom surface of the positioning hole 44. A fixing plate 23 is also fixed to the outer surface of the movable mold 2 by screws 231. This fixing plate 23 covers the outer end of the mounting hole 21.

[0029] like Figure 4 As shown, during injection molding, the insert 101 is inserted into the positioning section 211 of the mounting hole 21, and the electromagnetic coil 5 is energized in the positive direction, so that the positioning end 41 of the core column 4 generates a magnetic attraction to the insert 101, positioning the insert 101, and then the molten plastic is injected into the cavity 3 to form the product 10. Figure 5As shown, after the product 10 is formed and solidified, it needs to be demolded. The electromagnetic coil 5 is energized in reverse in advance. The magnetic attraction of the positioning end 41 of the core column 4 disappears, and a reverse repulsion is generated. At the same time, a magnetic thrust is generated on the core sleeve 7 in the direction of the positioning end 41. The core sleeve 7 moves toward the positioning end 41 and compresses the reset spring 9 until the core sleeve 7 rests on the bottom surface of the guide section 421. At this time, since the product 10 is still in the cavity 3, the ejector rod 6 rests on the insert 101 and is difficult to move. Therefore, the annular baffle 71 of the core sleeve 7 will compress the ejector spring 81 to store force. The ejector rod 6 is pressed against the insert 101 by the elastic force of the ejector spring 81. Figure 6 As shown, when the ejector pin of the mold pushes the product 10 out of the cavity 3 , the pushing force of the ejector rod 6 on the insert 101 can help the insert 101 to escape from the mounting hole 21 .

[0030] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope of the appended claims.

[0031] Although this document frequently uses terms such as fixed die 1, movable die 2, and mounting hole 21, the use of other terms is not excluded. These terms are used solely to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitations is contrary to the spirit of the present invention.

Claims

1. An intelligent auxiliary molding mechanism for mold insert products, the mold comprising a fixed mold (1) and a movable mold (2), wherein the fixed mold (1) and the movable mold (2) are capable of forming a cavity (3) when the fixed mold (1) and the movable mold (2) are closed, and characterized in that: The auxiliary molding mechanism includes a mounting hole (21) provided on the side of the cavity (3) and used for inserting the insert (101), an iron core column (4) is fixedly inserted in the mounting hole (21), and the end of the iron core column (4) facing the cavity (3) is a positioning end (41), an electromagnetic coil (5) is spirally wound on the iron core column (4), and a guide hole (42) is provided in the iron core column (4) along the axial direction and penetrates to the end face of the positioning end (41), and the guide hole (42) ) is provided with a push rod (6) and an iron core sleeve (7) slidingly therein, and an elastic member (8) is provided between the iron core sleeve (7) and the push rod (6) so as to push the push rod (6) and make the end of the push rod (6) extend out of the end face of the positioning end (41) when the iron core sleeve (7) moves toward the positioning end (41); the elastic member (8) includes a push spring (81), an annular baffle (71) is fixed on the inner wall of the iron core sleeve (7), and an annular abutting convex edge ( 61), the push rod (6) is slidably inserted into the core sleeve (7), and the abutting convex edge (61) is located between the annular baffle (71) and the positioning end (41), the pushing spring (81) is arranged in the core sleeve (7) and sleeved on the push rod (6), and one end of the pushing spring (81) abuts on the annular baffle (71), and the other end abuts on the abutting convex edge (61); the guide hole (42) includes a guide section (421) and a through section (422), The aperture of the through section (422) is smaller than the aperture of the guide section (421), and the outer end opening of the through section (422) penetrates to the end face of the positioning end (41), the core sleeve (7) is located in the guide section (421), and the outer wall of the core sleeve (7) is in sliding engagement with the hole wall of the guide section (421), the outer wall of the inner end of the push rod (6) is in sliding engagement with the inner hole wall of the annular baffle (71), and the outer wall of the outer end of the push rod (6) is in sliding engagement with the hole wall of the through section (422).

2. The intelligent auxiliary molding mechanism for mold insert products according to claim 1, characterized in that: A plug (45) is screwed to one end of the guide hole (42) away from the positioning end (41), and a return spring (9) is further provided in the guide section (421) of the guide hole (42). The return spring (9) is located between the core sleeve (7) and the positioning end (41), and one end of the return spring (9) abuts against the core sleeve (7), and the other end abuts against the bottom surface of the guide section (421). Under the action of the return spring (9), the core sleeve (7) abuts against the inner end surface of the plug (45).

3. The intelligent auxiliary molding mechanism for mold insert products according to claim 2, characterized in that: An annular limiting portion (72) is provided on the inner wall of one end of the core sleeve (7) close to the positioning end (41), and the end of the return spring (9) extends into the core sleeve (7) and abuts against the limiting portion (72).

4. The intelligent auxiliary molding mechanism for mold insert products according to claim 3, characterized in that: The outer edge of the annular baffle (71) is in sliding engagement with the inner circumference of the core sleeve (7), and the outer circumference of the push rod (6) is in sliding engagement with the inner circumference of the limiting portion (72). Under the action of the push spring (81), the annular baffle (71) abuts against the limiting portion (72).

5. The intelligent auxiliary molding mechanism for insert products of a mold according to any one of claims 1 to 4, characterized in that: The mounting hole (21) is formed on the movable mold (2), and the mounting hole (21) comprises a positioning section (211) for inserting the insert (101) and a mounting section (212), the aperture of the positioning section (211) being smaller than the aperture of the mounting section (212), and the positioning section (211) extends through the side surface of the cavity (3), and the core column (4) is fixed in the mounting section (212).

6. The intelligent auxiliary molding mechanism for mold insert products according to claim 5, characterized in that: The positioning end (41) of the core column (4) has an annular fixed ridge (43) in the circumferential direction, and the outer circumferential surface of the fixed ridge (43) is fixedly connected to the hole wall of the mounting section (212) through a threaded connection. A mounting gap (22) is formed between the outer circumferential surface of the core column (4) and the hole wall of the mounting section (212), and the electromagnetic coil (5) is located in the mounting gap (22).

7. The intelligent auxiliary molding mechanism for mold insert products according to claim 6, characterized in that: A positioning hole (44) is formed on the radial inner side of the fixed protrusion (43). The positioning hole (44) is coaxially arranged with the positioning section (211) of the mounting hole (21), and the aperture of the positioning hole (44) is the same as the aperture of the positioning section (211). The end surface of the positioning end (41) is the bottom surface of the positioning hole (44).

8. The intelligent auxiliary molding mechanism for insert products of a mold according to any one of claims 1 to 4, characterized in that: A fixing plate (23) is also fixed on the outer side of the movable mold (2), and the fixing plate (23) covers the outer end of the mounting hole (21).

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