Injection product ejection mechanism and injection mold

Abstract

The utility model discloses an injection product ejection mechanism and an injection mold, the injection product ejection mechanism comprises a rear mold core, one side of the rear mold core is provided with an insert placing position and an injection molding position, the insert placing position is used for placing an insert, the injection molding position is used for injection molding of a plastic box, and an ejection through hole is arranged in the rear mold core corresponding to the insert placing position. An air inlet ejector pin is inversely arranged in the ejection through hole and comprises an ejector pin main body and an ejector pin cap located at one end of the ejector pin main body, the ejection through hole comprises a main body through hole and a limiting groove located at the end, close to the cavity, of the main body through hole, the ejector pin cap is movably arranged in the limiting groove in a plugging mode, and the ejector pin main body is arranged in the main body through hole in a penetrating mode; and an air inlet channel communicating with the limiting groove is formed in the inner wall of the main body through hole. According to the utility model, gas can quickly enter the inner bottom of the plastic box through the gas inlet channel and the limiting groove, so that negative pressure generated during ejection is thoroughly eliminated, the plastic box is prevented from being deformed or broken due to suction, and an aluminum plate and the plastic box are combined more tightly and reliably.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection product ejection mechanism and an injection mold. Background Art

[0002] Many current plastic boxes have inserts such as aluminum plates, that is, the aluminum plate and the plastic box are integrally molded by injection molding, such as Figure 1 and 2 As shown, an existing injection mold for forming a plastic box with an aluminum plate comprises a rear mold core 1', an insert through hole is arranged in the rear mold core 1', an air intake insert 2' is fixedly arranged in the insert through hole, the cross section of the insert through hole is cylindrical, and a section is arranged on the edge of the air intake insert 2', and an air intake gap 3' is formed between the section of the air intake insert 2' and the insert through hole. The air intake effect of the air intake gap 3' formed by this arrangement is not good. When the plastic box is ejected, a large negative pressure will be generated at the inner bottom of the plastic box, which may easily cause the plastic box to be deformed or damaged due to vacuum suction, and the air valve may also be difficult to control due to air pressure and flow, which often causes the product to be blown up or broken by negative pressure, so that the aluminum plate at the bottom of the plastic box is broken and separated from the plastic box when ejected. Utility Model Content

[0003] The utility model aims to provide an ejection mechanism for injection molded products to solve the above-mentioned technical problems.

[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is: an ejection mechanism for an injection molded product, comprising a rear mold core, an insert placement position and an injection molding position being arranged on one side of the rear mold core, the insert placement position being used to place the insert, the injection molding position being used to injection mold the plastic box, an ejection through hole being opened at a position corresponding to the insert placement position in the rear mold core, an air intake ejector being invertedly arranged in the ejection through hole, the air intake ejector comprising an ejector body and an ejector cap located at one end of the ejector body, the ejection through hole comprising a main body through hole and a limiting groove located at one end of the main body through hole close to the cavity, the ejector cap being movably sealed and arranged in the limiting groove, the ejector body being arranged through the main body through hole, and an air intake channel connected to the limiting groove being arranged on the inner wall of the main body through hole.

[0005] Preferably, there are multiple air inlet channels, and the multiple air inlet channels are evenly arranged along the circumferential direction of the main body through hole, and the air inlet channels extend along the length direction of the main body through hole and penetrate the inner wall of the main body through hole.

[0006] Preferably, the diameter of the ejector body is adapted to the aperture of the body through hole.

[0007] Preferably, the ejector cap and the limiting groove are both in the shape of an inverted frustum.

[0008] Preferably, the insert placement position is arranged inside the injection molding position, the ejection through hole is arranged in the middle of the rear mold core corresponding to the insert placement position, and the axial direction of the ejection through hole is perpendicular to the insert placement position.

[0009] Preferably, an insert through hole is provided in the rear mold core at the position corresponding to the insert placement position, an air intake insert is fixedly installed in the insert through hole, the insert through hole is cylindrical, a cut surface is provided on the edge of the air intake insert, and an air intake gap is formed between the cut surface of the air intake insert and the insert through hole.

[0010] Preferably, it also includes a front mold core, and the opposite sides of the front mold core and the rear mold core cooperate with each other to form a molding cavity, and the insert placement position and the injection molding position are located on the side of the rear mold core facing the molding cavity.

[0011] The utility model also provides an injection mold, comprising any one of the above-mentioned injection product ejection mechanisms.

[0012] The utility model has the following beneficial effects:

[0013] During the molding process of the plastic box, the utility model has the ejector cap sealed in the limiting groove. After the plastic box is molded, the air intake ejector moves toward the direction of the plastic box to assist in ejecting it, and at the same time, the space at the inner bottom of the plastic box is in a connected state with the limiting groove and the air intake channel. Gas can quickly enter the inner bottom of the plastic box through the air intake channel and the limiting groove, and the negative pressure generated during ejection is completely eliminated, thereby preventing the plastic box from being deformed or broken by suction, making the combination of the aluminum plate and the plastic box more compact and reliable, and making it difficult for the air valve to control the air pressure and flow, causing the plastic box to be blown up or broken by negative pressure, thereby further preventing the aluminum plate at the bottom of the plastic box from being broken and separated from the plastic box during ejection. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a top view of the prior art;

[0015] Figure 2 yes Figure 1 Sectional view at AA in the middle;

[0016] Figure 3 It is an exploded schematic diagram of the plastic box and the rear film core of the embodiment of the utility model;

[0017] Figure 4 This is an internal perspective view of a plastic box according to an embodiment of the present utility model;

[0018] Figure 5 It is a top view of the rear membrane core of the embodiment of the utility model;

[0019] Figure 6 yes Figure 5 Sectional view at the middle BB;

[0020] Figure 7 yes Figure 5 Sectional view at CC;

[0021] Figure 8 It is a partial enlarged schematic diagram of the rear membrane core of the embodiment of the utility model at a viewing angle;

[0022] Fig. 9 It is a partially enlarged schematic diagram of the rear membrane core of the embodiment of the utility model at another viewing angle;

[0023] Fig.10 It is a schematic structural diagram of an air intake ejector pin according to an embodiment of the utility model;

[0024] Fig.11 It is a structural schematic diagram of the rear membrane core of the embodiment of the utility model without the air inlet insert;

[0025] Fig.12 It is a structural schematic diagram of an air intake insert of an embodiment of the utility model;

[0026] Existing technology part: 1' rear mold core, 2' air intake insert, 3' air intake gap;

[0027] Parts of the utility model include: 1 rear mold core, 2 insert placement position, 3 injection molding position, 4 main body through hole, 5 limiting groove, 6 air intake channel, 7 insert through hole, 8 air intake insert, 9 section, 10 air intake gap, 11 aluminum plate, 12 plastic box, 13 ejector main body, and 14 ejector cap. DETAILED DESCRIPTION

[0028] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0029] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0030] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] See also Figure 3-12 As shown, as an embodiment of the utility model, an ejection mechanism for an injection molded product is provided, including a rear mold core 1, and an insert placement position 2 and an injection molding position 3 are arranged on one side of the rear mold core 1. The insert placement position 2 is used to place inserts such as an aluminum plate 11 thereon, and the injection molding position 3 is used to injection mold a plastic box 12, so that the aluminum plate 11 and the plastic box 12 are integrally molded to form a complete plastic box product, and an ejection through hole is opened in the rear mold core 1 at the corresponding insert placement position 2, and an air intake ejector is invertedly arranged in the ejection through hole, the air intake ejector includes an ejector main body 13 and an ejector cap 14 located at one end of the ejector main body 13, the ejection through hole includes a main body through hole 4 and a limiting groove 5 located at one end of the main body through hole 4 close to the cavity, the ejector cap 14 is movably sealed and arranged in the limiting groove 5, the ejector main body 13 is penetrated and arranged in the main body through hole 4, and the inner wall of the main body through hole 4 is arranged There is an air inlet channel 6 connected with the limiting groove 5. During the molding process of the plastic box, the ejector cap 14 is sealed and set in the limiting groove 5. When the plastic box is molded, the air inlet ejector moves toward the plastic box to assist in ejecting it. At the same time, the space at the inner bottom of the plastic box is connected with the limiting groove 5 and the air inlet channel 6. The gas can quickly enter the inner bottom of the plastic box through the air inlet channel 6 and the limiting groove 5, and completely eliminate the negative pressure generated during ejection, so as to avoid the plastic box being deformed or broken by suction, so that the aluminum plate 11 and the plastic box 12 are more tightly and reliably combined, and the air valve is not easy to be blown or broken by negative pressure due to the difficulty in controlling the air pressure and flow, so as to further prevent the aluminum plate 11 at the bottom of the plastic box from being broken and separated from the plastic box 12 during ejection; in addition, the inverted air inlet ejector also plays a role in assisting ejection, and the ejection effect is better.

[0032] In this embodiment, there are multiple air inlet grooves 6, and the multiple air inlet grooves 6 are evenly arranged along the circumferential direction of the main body through hole 4, and the air inlet grooves 6 extend along the length direction of the main body through hole 4 and penetrate the inner wall of the main body through hole 4. This arrangement makes the air intake process faster, more uniform and stable, the air intake volume is also larger, and the effect of eliminating negative pressure is better.

[0033] In this embodiment, the diameter of the ejector body 13 corresponds to the aperture of the main body through hole 4, that is, the ejector body is tightly fitted to the inner wall of the main body through hole 4, thereby ensuring the stable installation of the air intake ejector and the stability of the ejection process.

[0034] In this embodiment, the ejector cap 14 and the limiting groove 5 are both in the shape of an inverted truncated cone, so that when the plastic box is being formed, the ejector cap 14 can be reliably sealed in the limiting groove 5, and the sealing is better. When the plastic box is ejected, an inverted truncated cone-shaped air inlet is formed at the limiting groove 5, which has a better air intake effect and quickly eliminates negative pressure.

[0035] In this embodiment, the insert placement position 2 is arranged inside the injection molding position 3, and the ejection through hole is arranged in the middle of the rear mold core 1 corresponding to the insert placement position 2, and the axial direction of the ejection through hole is perpendicular to the insert placement position 2 to ensure the ejection stability and air intake efficiency of the product.

[0036] In the present embodiment, an insert through hole 7 is further provided in the rear mold core 1 at the position corresponding to the insert placement position 2, and an air intake insert 8 is fixedly installed in the insert through hole 7. The insert through hole 7 is cylindrical, and a cut surface 9 is provided at the edge of the air intake insert 8. An air intake gap 10 is formed between the cut surface 9 of the air intake insert 8 and the insert through hole 7. The air intake gap 10 serves the function of assisting air intake. Of course, it is also possible not to provide this structure, that is, it is also possible to completely intake air through the limiting groove 5 and the air intake channel 6.

[0037] In this embodiment, a front mold core is also included. The front mold core cooperates with the opposite sides of the rear mold core 1 to form a molding cavity. The insert placement position 2 and the injection molding position 3 are located on the side of the rear mold core 1 facing the molding cavity.

[0038] The utility model also provides an injection mold, comprising the injection product ejection mechanism described above.

[0039] Although the present invention has been specifically demonstrated and described in conjunction with the preferred embodiments, those skilled in the art should understand that various changes made to the present invention in form and detail, without departing from the spirit and scope of the present invention as defined in the appended claims, shall fall within the scope of protection of the present invention.

Claims

1. An ejection mechanism for an injection molded product, characterized in that: The utility model comprises a rear mold core, and an insert placement position and an injection molding position are arranged on one side of the rear mold core. The insert placement position is used for placing the insert, and the injection molding position is used for injection molding the plastic box. An ejection through hole is opened at the position corresponding to the insert placement position in the rear mold core, and an air intake ejector is invertedly arranged in the ejection through hole. The air intake ejector comprises an ejector body and an ejector cap located at one end of the ejector body. The ejection through hole comprises a main body through hole and a limiting groove located at one end of the main body through hole close to the cavity. The ejector cap is movably sealed and arranged in the limiting groove. The ejector body is penetrated and arranged in the main body through hole, and an air intake channel connected with the limiting groove is arranged on the inner wall of the main body through hole.

2. The ejection mechanism for injection molded products according to claim 1, characterized in that: There are multiple air inlet channels, which are evenly arranged along the circumferential direction of the main body through hole, and the air inlet channels extend along the length direction of the main body through hole and penetrate the inner wall of the main body through hole.

3. The ejection mechanism for injection molded products according to claim 1, characterized in that: The diameter of the ejector body is correspondingly matched to the aperture of the main body through hole.

4. The ejection mechanism for injection molded products according to claim 1, characterized in that: The ejector cap and the limiting groove are both in the shape of an inverted frustum.

5. The ejection mechanism for injection molded products according to claim 1, characterized in that: The insert placement position is arranged inside the injection molding position, the ejection through hole is arranged in the middle of the rear mold core corresponding to the insert placement position, and the axial direction of the ejection through hole is perpendicular to the insert placement position.

6. The ejection mechanism for injection molded products according to claim 1, characterized in that: An insert through hole is also provided in the rear mold core at the position corresponding to the insert placement. An air intake insert is fixedly installed in the insert through hole. The insert through hole is cylindrical. A cut surface is provided on the edge of the air intake insert. An air intake gap is formed between the cut surface of the air intake insert and the insert through hole.

7. The ejection mechanism for injection molded products according to claim 1, characterized in that: It also includes a front mold core, and the front mold core and the rear mold core cooperate with each other on opposite sides to form a molding cavity, and the insert placement position and the injection molding position are located on the side of the rear mold core facing the molding cavity.

8. An injection mold, characterized in that: It comprises the ejection mechanism for injection molded products as described in any one of claims 1 to 7.

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