Safety travel switch of injection mold

Abstract

The utility model provides a safety travel switch of an injection mold, and particularly relates to the technical field of injection molds. The switch is mounted between a bottom plate and an ejector plate of the injection mold and comprises an adjustable sliding rod and an inductive proximity switch, sliding grooves are formed in the two sides of the adjustable sliding rod in the length direction. The induction proximity switch can move up and down along the sliding groove of the adjustable sliding rod through the switch fixing frame, and the relative position between the induction proximity switch and the adjustable sliding rod is adjusted. According to the utility model, the precise 24V induction proximity switch is fixed by the independent bracket, so that the ejection and retreating of the ejector pin of the injection mold can be detected every time, the sensitivity is high, the universality is wide, the failure is not easy to occur, whether the ejection mechanism is completely reset can be detected, and the mold is protected more safely and reliably.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, concretely relates to a safety stroke switch of injection mold. BACKGROUND

[0002] In normal injection production process, the problem of ejector pin not retracting caused by pulling hair, jamming and other reasons exists universally, and the mold ejector pin not retracting continues to close the mold, which can seriously damage the mold cavity, core and slider, and cause the problems of delaying order production and high maintenance cost of injection mold.

[0003] The current traditional mold solves this problem by using a mechanical type ejection, retracting safety stroke switch (installed in the middle of the injection mold base plate and ejector pin pressure plate), which has low sensitivity and often fails, and if the ejection mechanism of the mold fails to reset correctly, the mold can be damaged during the next closing. UTILITY MODEL CONTENTS

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides a safety stroke switch of injection mold, and the specific technical scheme is as follows:

[0005] A safety stroke switch of injection mold is used for being installed between the base plate and the ejector pin plate of the injection mold, comprising an adjustable slide rod and a sensing proximity switch; the left and right sides of the adjustable slide rod are provided with sliding grooves along the length direction; the sensing proximity switch can move up and down along the sliding grooves of the adjustable slide rod and adjust the relative position between the sensing proximity switch and the adjustable slide rod through a switch fixing frame.

[0006] Preferably, at least two movable square nuts are arranged in the sliding grooves; the outer diameter of each square nut is matched with the inner diameter of the sliding groove.

[0007] Preferably, the switch fixing frame is in L-shaped structure, one wing plate is threadedly connected with the square nut at the upper part through an inner hexagonal screw, so as to fix the position between the switch fixing frame and the adjustable slide rod; the other wing plate is provided with a through hole at the end away from the adjustable slide rod.

[0008] Preferably, the sensing proximity switch is installed in the through hole.

[0009] Preferably, the sensing proximity switch adopts a direct current power supply with an output voltage of 24V.

[0010] Preferably, a right-angle fixing frame is arranged at the position close to the bottom of the outer side wall of each sliding groove.

[0011] Preferably, the vertical plate of the right-angle fixing frame is threadedly connected with the square nut at the lower part through an inner hexagonal screw, so as to fix the right-angle fixing frame and the adjustable slide rod.

[0012] Further preferably, the horizontal plate bottom of the right-angle fixing frame is provided with at least two fixed magnets.

[0013] Still further preferably, the diameter of the fixed magnet is 18mm.

[0014] Still further preferably, an angular rib plate is arranged between the horizontal plate and the vertical plate of the right-angle fixing frame.

[0015] The present application has the following advantages:

[0016] The present application uses a separate switch fixing frame to fix the precise 24V induction proximity switch, so that the ejection and retraction of the injection mold ejector pin can be detected each time, the sensitivity is high, the universality is wide, the switch is not easy to fail, the ejection mechanism can be detected whether it has been completely reset, and the mold is more safely and reliably protected. BRIEF DESCRIPTION OF DRAWINGS

[0017] The drawings constituting the specification of the present application are used to provide further understanding of the present application and do not constitute undue limitation on the present application.

[0018] Fig. 1 The present application is a schematic diagram of the overall structure;

[0019] Fig. 2 The present application is an exploded view;

[0020] In the figure, 1 is an adjustable slide rod; 2 is a switch fixing frame; 3 is an induction proximity switch; 4 is a right-angle fixing frame; 5 is a fixed magnet; and 6 is a square nut. DETAILED DESCRIPTION

[0021] The specific implementation of the safety stroke switch of the injection mold provided by the present application is further described in combination with the drawings and examples.

[0022] As shown in the figure, a safety stroke switch of an injection mold is used to be installed between the bottom plate and the ejector plate of the injection mold, and includes an adjustable slide rod 1 and an induction proximity switch 3. Figs. 1-2 The left and right sides of the adjustable slide rod 1 are provided with slide grooves along the length direction; the induction proximity switch 3 can move up and down along the slide grooves of the adjustable slide rod 1 through the switch fixing frame 2 and adjust the relative position between the switch fixing frame 2 and the adjustable slide rod 1, and can be suitable for various types of injection molds, and has wide universality.

[0023] Preferably, at least two movable square nuts 6 are arranged in the slide groove; the outer diameter size of each square nut 6 is matched with the inner diameter size of the slide groove.

[0024] Preferably, the switch fixing frame 2 is in L-shaped structure, one wing plate is screwed with the square nut 6 located at the upper part through the inner hexagonal screw to realize the position fixation between the switch fixing frame 2 and the adjustable slide rod 1; the other wing plate is provided with a through hole at the end away from the adjustable slide rod 1, and the inductive proximity switch 3 is installed in the through hole.

[0025] Preferably, the inductive proximity switch 3 adopts a direct current power supply with an output voltage of 24V.

[0026] It is also preferable that a right-angle fixing frame 4 is arranged at the position close to the bottom of each sliding groove outer side wall; and the vertical plate of the right-angle fixing frame 4 is screwed with the square nut 6 located at the lower part through the inner hexagonal screw to realize the fixation between the right-angle fixing frame 4 and the adjustable slide rod 1.

[0027] It is further preferable that at least two fixed magnets 5 are arranged at the bottom of the horizontal plate of the right-angle fixing frame 4, and the safety travel switch is fixed on the bottom plate of the mold (i.e. the position between the injection mold bottom plate and the ejector pin plate) through the fixed magnets 5; preferably, the diameter of the fixed magnet 5 is 18mm.

[0028] It is still further preferable that an angular rib plate is arranged between the horizontal plate and the vertical plate of the right-angle fixing frame 4 to ensure the overall force stability.

[0029] The utility model discloses a single switch fixing frame for fixing the precise 24V inductive proximity switch, which can adjust the relative position between the inductive proximity switch and the adjustable slide rod according to the requirement, so that the ejection and retraction of the injection mold ejector pin can be detected every time, the sensitivity is high, the universality is wide, the utility model discloses a kind of safety travel switches, and it is not easy to fail, whether the ejection mechanism has been completely reset can be detected, more safely and reliably protect the mold.

[0030] In the utility model, the orientation or positional relationship indicated by terms such as "upper", "lower", "bottom" and "top" is the orientation or positional relationship shown in the drawings, which is only a relationship word determined for the convenience of describing the structural relationship of components or elements of the utility model, and cannot be understood as a limitation on the utility model. Terms such as "connected", "connected" should be understood broadly, which means that it can be fixedly connected, integrally connected or detachably connected; it can be directly connected or indirectly connected through an intermediate medium. For relevant researchers or technicians in the field, the specific meaning of the above terms in the utility model can be determined according to the specific situation, and cannot be understood as a limitation on the utility model.

[0031] Of course, the above description is not a limitation on the utility model, and the utility model is not limited to the above examples. Changes, modifications, additions or replacements made by technicians in the technical field within the essential scope of the utility model should also be within the protection scope of the utility model.

Claims

1. A safety limit switch for injection molds, used for installation between the base plate and ejector plate of an injection mold, characterized in that, It includes an adjustable slide bar and a proximity switch; the adjustable slide bar has grooves on both sides along its length. The proximity switch can be moved up and down along the slide groove of the adjustable slide rod via the switch mounting bracket, and its relative position with the adjustable slide rod can be adjusted.

2. The injection mold safety limit switch according to claim 1, characterized in that, At least two movable square nuts are provided inside the groove; The outer diameter of each square nut is matched with the inner diameter of the groove.

3. The injection mold safety limit switch according to claim 2, characterized in that, The switch mounting bracket has an L-shaped structure, and one of its wing plates is threaded to a square nut located at the top by an internal hex screw to fix the position between the switch mounting bracket and the adjustable slide rod. The other wing plate has a through hole at the end away from the adjustable slide bar.

4. The injection mold safety limit switch according to claim 3, characterized in that, The proximity switch is installed inside the through hole.

5. The injection mold safety limit switch according to claim 4, characterized in that, The proximity switch uses a DC power supply with an output voltage of 24V.

6. The injection mold safety limit switch according to claim 2, characterized in that, Each of the aforementioned chutes has a right-angle fixing bracket installed on its outer side wall near its bottom.

7. The injection mold safety limit switch according to claim 6, characterized in that, The vertical plate of the right-angle fixing bracket is threadedly connected to the square nut located at the bottom by an internal hex screw to fix the right-angle fixing bracket to the adjustable slide rod.

8. The injection mold safety limit switch according to claim 7, characterized in that, At least two fixing magnets are provided at the bottom of the horizontal plate of the right-angle fixing bracket.

9. The injection mold safety limit switch according to claim 8, characterized in that, The diameter of the fixed magnet is 18mm.

10. The injection mold safety limit switch according to claim 6, characterized in that, An angular rib is provided between the horizontal and vertical plates of the right-angle fixing frame.

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