Ejection mechanism for positioning injection molding insert and injection mold

Abstract

The ejection mechanism comprises a movable mold and further comprises a positioning piece, a damping piece and a liftable ejector pin which are arranged on the movable mold, one end of the positioning piece penetrates through a movable mold core of the movable mold in a liftable mode, and the other end of the positioning piece is inserted into a movable mold plate of the movable mold in a liftable mode. The end, deviating from the movable mold core, of the positioning piece is slidably connected with the ejector pin, during mold opening, the ejector pin drives the positioning piece to protrude out of the cavity face of the movable mold core so as to form ejection arrangement, the damping piece applies damping force to the positioning piece so as to limit the positioning piece to retract into the cavity face, and then the next insert can be positioned, so that the insert can be accurately positioned in the mold core; the problem of shoveling aluminum skimmings is avoided, an injection molded part product after integral injection molding can be ejected out, and accurate positioning of a next insert is continued.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to an ejection mechanism and an injection mold for positioning an injection molded part. Background Art

[0002] The front shell of a mobile phone is often provided with a complex insert structure, such as a stainless steel insert or an aluminum alloy insert. Therefore, before the insert is integrally injection molded, it is necessary to first accurately position the insert, and the insert is positioned in the mold core of the injection mold only by optical CCD automatic assisted alignment. However, due to the insufficient alignment accuracy of the CCD alignment, the insert cannot be accurately placed in the mold core as designed, resulting in the side wall of the front shell after molding being easily scraped of aluminum chips and having to be scrapped. The production cost of such an operation is high, and its production efficiency and production yield are also low. Summary of the invention

[0003] To this end, in order to solve the above-mentioned problem, the present invention provides an ejection mechanism and an injection mold for positioning injection molded inserts, which can not only accurately position the insert in the mold core to avoid the problem of shoveling aluminum chips, but also eject the injection molded product after integral injection molding and continue with the precise positioning of the next insert.

[0004] To achieve the above purpose, the technical solution provided by the present invention is as follows:

[0005] The present invention provides an ejection mechanism for positioning an injection molded insert, comprising a movable mold, and also comprising a positioning member, a damping member and a liftable ejector pin arranged on the movable mold; one end of the positioning member is liftably arranged in a movable mold core of the movable mold, and the other end of the positioning member is liftably inserted in a movable mold plate of the movable mold, and one end of the positioning member facing away from the movable mold core is slidably connected to the ejector pin; when the mold is opened, the ejector pin drives the positioning member to protrude from the cavity surface of the movable mold core to form an ejection arrangement, and the damping member applies a damping force to the positioning member to limit the positioning member from retracting to the cavity surface, thereby being used to position the next insert.

[0006] Furthermore, the damping member is an elastic O-ring, the damping member is fixedly arranged, and the positioning member can be raised and lowered and penetrated through the inner ring of the damping member; when the positioning member is raised and lowered, the damping member applies an inward elastic force to the positioning member, thereby forming a damping friction force to limit the corresponding movement of the positioning member.

[0007] Furthermore, the O-ring is a rubber ring.

[0008] Furthermore, the damping member is fixedly arranged between the movable mold core and the movable mold plate.

[0009] Furthermore, a guide groove is provided at one end of the ejector pin facing the positioning member, and an end of the positioning member facing away from the movable mold core can be slidably assembled in the guide groove; during ejection, the bottom of the guide groove is used to push against the end of the positioning member facing the ejector pin.

[0010] Furthermore, the ejector pin is provided with an ejector pin plate, and one end of the ejector pin facing away from the positioning member is connected to the ejector pin plate.

[0011] Furthermore, the cavity surface is provided with a suction cup for adsorbing the insert.

[0012] The present invention provides an injection mold, which at least comprises the above-mentioned ejection mechanism for positioning the injection molded insert.

[0013] The technical solution provided by the present invention has the following beneficial effects:

[0014] When the mold is opened, the ejector pin overcomes the damping force applied by the damping member to the positioning member, and drives the positioning member to protrude from the cavity surface of the movable mold core to eject the injection molded product after integral injection molding. When the ejector pin is retracted and reset, the damping force applied by the damping member to the positioning member is used to limit the positioning member from retracting from the cavity surface. This is conducive to sleeve the next insert on the positioning member, so as to achieve accurate positioning of the next insert in the movable mold core of the movable mold, thereby avoiding the problem of scraping aluminum chips, and at the same time can effectively reduce production costs, and improve production efficiency and production yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 Shown is a cross-sectional view of an ejection mechanism for positioning an injection molded insert in the first embodiment;

[0016] Figure 2 Shown Figure 1 A magnified schematic diagram of area A in the middle. DETAILED DESCRIPTION

[0017] 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.

[0018] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0019] Embodiment 1

[0020] Reference Figure 1 and Figure 2 As shown, embodiment 1 provides an ejection mechanism for positioning injection molded inserts (hereinafter referred to as the ejection mechanism), which is used for one-piece injection molding of injection molded products with inserts, and the insert of this embodiment is an aluminum alloy insert, and the injection molded product after molding is the front shell of a mobile phone.

[0021] like Figure 1 As shown, the ejection mechanism of this embodiment includes a movable mold 2, and also includes a positioning member 1, a damping member 3 and a liftable ejector pin 4 arranged on the movable mold 2.

[0022] The upper end of the positioning member 1 can be lifted and inserted into the movable mold core 21 of the movable mold 2 , and the lower end of the positioning member 1 can be lifted and inserted into the movable mold plate 22 of the movable mold 2 , and is slidably connected to the ejector pin 4 .

[0023] When the mold is opened, the ejector pin 4 drives the positioning member 1 to protrude from the cavity surface 211 of the movable mold core 21 to form an ejection arrangement, and the damping member 3 applies a damping force to the positioning member 1 to limit the positioning member 1 from retracting to the cavity surface 211, thereby being used to position the next insert.

[0024] In this embodiment, Figure 2 As shown, the damping member 3 is an elastic O-shaped rubber ring and is fixedly arranged between the movable mold core 21 and the movable mold plate 22, and the positioning member 1 can be lifted and lowered and penetrated through the inner ring of the damping member 3. Of course, in other embodiments, the damping member 3 can also be a rubber block arranged around the positioning member 1, and damping limitation can also be achieved.

[0025] More specifically, Figure 1 As shown, the ejector pin 4 is provided with an ejector plate 23, and the lower end of the ejector pin 4 is connected to the ejector plate 23 to ensure that the ejector plate 23 can drive the ejector pin 4 to perform corresponding movements when the mold is opened or closed.

[0026] A guide slot 41 is provided at the upper end of the ejector pin 4, and the lower end of the positioning member 1 can be slidably assembled in the guide slot 41, and the lower end of the positioning member 1 and the bottom of the guide slot 41 are configured so that the bottom of the guide slot 41 can push against the lower end of the positioning member 1 during ejection, so as to ensure that the positioning member 1 is ejected from the cavity surface 211.

[0027] When the positioning member 1 rises or falls in the damping member 3, the damping member 3 always applies an inward elastic force to the positioning member 1, thereby forming a damping friction force to limit the positioning member 1 from performing corresponding movement, that is, the direction of the damping friction force is opposite to the movement direction of the positioning member 1.

[0028] When the mold is opened, the ejector pin 4 is subjected to the mold opening force applied by the ejector plate 23 to overcome the damping force applied by the damping member 3 to the positioning member 1, and drives the positioning member 1 to protrude from the cavity surface 211 of the movable mold core 21 to eject the injection molded product after integral injection molding.

[0029] And after the ejector pin 4 is driven by the ejector plate 23 to retract and reset again, since the damping member 3 always applies a damping force to the positioning member 1, in the absence of the force of the ejector pin 4, the damping member 3 can limit the positioning member 1 from retracting to the cavity surface 211, which is conducive to setting the next insert on the positioning member 1, so as to achieve accurate positioning of the next insert in the movable mold core 21, thereby avoiding the problem of scraping aluminum chips, and at the same time can effectively reduce production costs, and improve production efficiency and production yield.

[0030] Further preferably, Figure 1 As shown, the cavity surface 211 is provided with a suction cup 5 for adsorbing the insert.

[0031] After the ejector pin 4 and the ejector plate 23 are reset, the aluminum alloy insert is grabbed by the external manipulator and put on the positioning member 1 to accurately position the aluminum alloy insert relative to the movable mold core 21. The aluminum alloy insert is then pressed downward by the manipulator to overcome the damping force of the damping member 3 to move the aluminum alloy insert downward until it fits the cavity surface 211 of the movable mold core 21. At this time, the aluminum alloy insert is fixed by vacuum adsorption by the suction cup 5 to ensure that the aluminum alloy insert no longer moves on the cavity surface 211 of the movable mold core 21. Finally, the fixed mold and the movable mold 2 of the injection mold are closed to complete the one-piece injection molding of the aluminum alloy insert.

[0032] Embodiment 2

[0033] The second embodiment provides an injection mold, which at least includes the ejection mechanism for positioning the injection molded insert of the first embodiment.

[0034] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. An ejection mechanism for positioning an injection molded insert, comprising a movable mold, characterized in that: It also includes a positioning member, a damping member and a liftable ejector pin arranged on the movable mold; One end of the positioning member can be lifted and inserted into the movable mold core of the movable mold, and the other end can be lifted and inserted into the movable mold plate of the movable mold, and the end of the positioning member away from the movable mold core is slidably connected to the ejector pin; When the mold is opened, the ejector pin drives the positioning member to protrude from the cavity surface of the movable mold core to form an ejection arrangement, and the damping member applies a damping force to the positioning member to limit the positioning member from retracting into the cavity surface, thereby being used to position the next insert.

2. The ejection mechanism for positioning an injection molded insert according to claim 1, characterized in that: The damping member is an elastic O-ring, which is fixedly arranged, and the positioning member is raised and lowered and penetrates the inner ring of the damping member; when the positioning member is raised and lowered, the damping member applies an inward elastic force to the positioning member, thereby forming a damping friction force to limit the positioning member from performing corresponding movement.

3. The ejection mechanism for positioning an injection molded insert according to claim 2, characterized in that: The o-ring is a rubber ring.

4. The ejection mechanism for positioning an injection molded insert according to claim 2, characterized in that: The damping member is fixedly arranged between the movable mold core and the movable mold plate.

5. The ejection mechanism for positioning an injection molded insert according to any one of claims 1 to 4, characterized in that: A guide slot is provided at one end of the ejector pin facing the positioning member, and one end of the positioning member facing away from the movable mold core can be slidably assembled in the guide slot; during ejection, the bottom of the guide slot is used to push against the end of the positioning member facing the ejector pin.

6. The ejection mechanism for positioning an injection molded insert according to claim 5, characterized in that: The ejector pin is provided with an ejector pin plate, and one end of the ejector pin facing away from the positioning member is connected to the ejector pin plate.

7. The ejection mechanism for positioning an injection molded insert according to any one of claims 1 to 4, characterized in that: The cavity surface is provided with a suction cup for adsorbing the insert.

8. An injection mold, characterized in that: At least comprises the ejection mechanism for positioning the injection molded insert as described in any one of claims 1-7.

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