Injection mold with ejector pin return induction function

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection mold with an ejector pin return induction function, which comprises an upper mold and a lower mold which are matched with each other, the lower mold is provided with an ejector pin mechanism, the ejector pin mechanism comprises an ejector pin plate, an induction switch, a trigger piece and a plurality of ejector pins arranged on the ejector pin plate, and the ejector pin plate is movably arranged on the lower mold. The inductive switch is installed on the lower die, the trigger piece is installed on the ejector plate and ascends and descends along with the ejector plate to trigger the inductive switch, and the inductive switch is used for being electrically connected with an external driving mechanism for driving the upper die. According to the utility model, the function of sensing whether the ejector pin is returned or not is realized in a mode that the inductive switch is matched with the triggering piece, so that each time of mold closing is inevitably performed after the ejector pin is smoothly returned, the phenomenon that the ejector pin collides with the sliding block is avoided, and the safety of mold closing is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an injection mold with ejector pin return induction. Background Art

[0002] Current injection molds are equipped with ejector pins to eject the molded product, and the slider is positioned during mold closing to facilitate product formation. Consequently, the following situation can easily occur: after the mold is opened and the product is ejected and removed by the ejector pin, the ejector pin must be reset before the next mold closing process begins, allowing the slider to move directly over the ejector pin during the mold closing process. However, if the ejector pin is not fully reset, the slider and the ejector pin can collide, causing damage to the mold and requiring maintenance. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides an injection mold with ejector pin return sensing, which has the effect of sensing whether the ejector pin has returned to its position, ensuring that the mold can be closed after the ejector pin has returned to its position, thereby avoiding collision between the ejector pin and the slider.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The utility model provides an injection mold with ejector return sensing, comprising an upper mold and a lower mold that cooperate with each other, the lower mold being provided with an ejector mechanism, the ejector mechanism comprising an ejector plate, an induction switch, a triggering member, and a plurality of ejectors arranged on the ejector plate, the ejector plate being movably arranged on the lower mold, the induction switch being mounted on the lower mold, the triggering member being mounted on the ejector plate, the triggering member rising and falling with the ejector plate to trigger the induction switch, and the induction switch being used to be electrically connected to a driving mechanism that drives the upper mold from the outside.

[0006] Furthermore, the trigger member is provided with an adjusting groove, and the ejector plate is provided with a fixing hole. The adjusting groove and the fixing hole are connected and fixed by screws.

[0007] Furthermore, the lower mold is also provided with a plurality of guide columns, and the ejector plate is slidably arranged on the plurality of guide columns; a spring is provided on the outer sleeve of the guide column, and the two ends of the spring are respectively connected to the top of the ejector plate and the lower mold.

[0008] Furthermore, the lower mold is movably provided with a slider, which is used to slide to a specific position when the mold is closed.

[0009] Furthermore, the inductive switch is one of a photoelectric switch, a contact switch, a micro switch and a pressure sensor.

[0010] Furthermore, the lower mold is also provided with a driving module for driving the ejector plate to rise and fall, and the driving module is electrically connected to the induction switch; the driving module is electrically connected to the alarm.

[0011] The beneficial effects of the utility model are as follows: the utility model realizes the function of sensing whether the ejector pin has returned to its position by cooperating with the induction switch and the trigger member, thereby ensuring that each mold closing is performed after the ejector pin has returned to its position smoothly, avoiding the collision between the ejector pin and the slider, and ensuring the safety of mold closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the present utility model.

[0013] Figure 2 for Figure 1 Enlarged view of point A.

[0014] Figure 3 This is a schematic diagram of the positions of the slider and the ejector when the mold is closed in the present invention.

[0015] Figure numerals: 1—upper mold, 2—lower mold, 3—ejector mechanism, 4—slider, 5—ejector plate, 6—induction switch, 7—trigger, 8—ejector, 9—screw, 10—guide column, 11—spring, 12—drive module, 71—adjustment slot. DETAILED DESCRIPTION

[0016] In order to facilitate the understanding of those skilled in the art, the present invention is further described below in conjunction with the embodiments and drawings. The contents mentioned in the embodiments are not intended to limit the present invention. The present invention is described in detail below in conjunction with the drawings.

[0017] The utility model provides an injection mold with ejector return sensing, comprising an upper mold 1 and a lower mold 2 that cooperate with each other, the lower mold 2 being provided with an ejector mechanism 3, the ejector mechanism 3 comprising an ejector plate 5, an induction switch 6, a trigger member 7 and a plurality of ejectors 8 arranged on the ejector plate 5, the ejector plate 5 being movably arranged on the lower mold 2, the induction switch 6 being mounted on the lower mold 2, the trigger member 7 being mounted on the ejector plate 5, the trigger member 7 being raised and lowered with the ejector plate 5 to trigger the induction switch 6, and the induction switch 6 being used to be electrically connected to a driving mechanism that drives the upper mold 1 from the outside.

[0018] During actual use, the lower mold 2 is movably provided with a slider 4, and the slider 4 is used to slide to a specific position when the mold is closed.

[0019] After injection molding is completed, the upper mold 1 and lower mold 2 open. As the mold opening proceeds, the slider 4 returns to its original position and moves away from the product. The slider 4 is then driven upward by the ejector plate 5, whereby the ejector pins 8 on the ejector plate 5 eject the product from the core of the lower mold 2. After the product is removed, the ejector plate 5 is driven downward, causing the trigger member 7 to descend with it until the trigger member 7 triggers the sensor switch 6, at which point the ejector plate 5 returns to its original position. Subsequently, when the upper mold 1 and lower mold 2 are closed and the slider 4 is driven to move, the slider 4 will not collide with the ejector pins 8.

[0020] In this embodiment, the trigger member 7 is provided with an adjusting slot 71 , and the ejector plate 5 is provided with a fixing hole. The adjusting slot 71 is connected to the fixing hole and fixed by a screw 9 .

[0021] That is, different trigger members 7 may have dimensional errors. The present invention provides an adjustment slot 71 so that the staff can adjust the relative position of the adjustment slot 71 and the fixed hole according to the actual size of the trigger member 7, and then fix the two together with a screw 9 to ensure the accuracy of the position of the trigger member 7, that is, to ensure that the ejector pin 8 has been completely reset when the trigger member 7 triggers the sensor switch 6, thereby ensuring the stability of the present invention.

[0022] In this embodiment, the lower mold 2 is further provided with a plurality of guide posts 10, on which the ejector plate 5 is slidably mounted. Springs 11 are mounted on the outer sleeves of the guide posts 10, with the ends of the springs 11 connecting the top of the ejector plate 5 to the lower mold 2. The guide posts 10 are used to guide the ejector plate 5 in a predetermined direction, while the springs 11 are used to apply elastic force to the ejector plate 5 during reset, thereby ensuring reliable reset of the ejector plate 5.

[0023] Specifically, the sensor switch 6 is a photoelectric switch, a contact switch, a micro switch, or a pressure sensor. In this embodiment, the sensor switch 6 is a micro switch, with micro switches installed on both sides of the lower mold 2 and trigger members 7 installed on both sides of the ejector plate 5. Using a highly sensitive device as the sensor switch 6 ensures reliable operation of the present invention.

[0024] In this embodiment, the lower mold 2 is further provided with a driving module 12 for driving the ejector plate 5 to rise and fall. The driving module 12 is electrically connected to the induction switch 6; the driving module 12 is electrically connected to an alarm (not shown in the figure).

[0025] The drive module 12 can be a commonly used linear drive module 12 such as a gas spring 11 or a cylinder, and is used to drive the ejector plate 5 to move up and down. The alarm is preferably a buzzer. That is, when the drive module 12 fails to reset the ejector plate 5 within a preset time (i.e., the induction switch 6 is triggered by the trigger 7), the utility model encounters an accident such as the ejector plate 5 being stuck. At this time, the alarm is sounded through the alarm, and the drive mechanism is controlled to stop operation, so that the staff can safely investigate and handle the utility model.

[0026] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention is disclosed as a preferred embodiment as above, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to equivalent embodiments of the above-disclosed technical contents without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments according to the technology of the present invention, which do not depart from the content of the technical solution of the present invention, are within the scope of the technical solution of the present invention.

Claims

1. An injection mold with ejector pin return sensing, comprising an upper mold and a lower mold that cooperate with each other, wherein the lower mold is provided with an ejector pin mechanism, characterized in that: The ejector mechanism includes an ejector plate, an induction switch, a trigger member, and a plurality of ejectors arranged on the ejector plate. The ejector plate is movably arranged on the lower mold, the induction switch is installed on the lower mold, and the trigger member is installed on the ejector plate. The trigger member rises and falls with the ejector plate to trigger the induction switch. The induction switch is used to be electrically connected to a driving mechanism that drives the upper mold from the outside.

2. The injection mold with ejector pin return sensing according to claim 1, characterized in that: The triggering member is provided with an adjusting groove, and the ejector plate is provided with a fixing hole. The adjusting groove and the fixing hole are connected and fixed by screws.

3. The injection mold with ejector pin return sensing according to claim 1, characterized in that: The lower die is further provided with a plurality of guide posts, and the ejector plate is slidably arranged on the plurality of guide posts; a spring is provided on the outer sleeve of the guide post, and the two ends of the spring are respectively connected to the top of the ejector plate and the lower die.

4. The injection mold with ejector pin return sensing according to claim 1, characterized in that: The lower mold is movably provided with a slider, which is used to slide to a specific position when the mold is closed.

5. The injection mold with ejector pin return sensing according to claim 1, characterized in that: The inductive switch is one of a photoelectric switch, a contact switch, a micro switch and a pressure sensor.

6. The injection mold with ejector pin return sensing according to claim 1, characterized in that: The lower mold is further provided with a driving module for driving the ejector plate to rise and fall, and the driving module is electrically connected to the induction switch; the driving module is electrically connected to the alarm.

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