Variable-speed ejection structure of injection mold

Abstract

The utility model relates to a variable-speed ejection structure of an injection mold. The variable-speed ejection structure comprises a rear mold plate B, a base plate, an ejector plate, an ejector back plate and a code mold plate which are sequentially arranged, the structure further comprises an ejector pin and a guide sleeve for guiding the ejector pin; a mounting seat is arranged on the lower surface of the base plate; a multi-gear speed change gear box is arranged on the mounting seat; the output end of the multi-gear speed change gear box is provided with an output gear, and the input end is provided with an input gear; a longitudinal first rack meshed with the output gear is fixed on the side surface of the ejector pin, and a longitudinal second rack meshed with the input gear is arranged on the ejector pin plate; by applying the variable-speed ejection structure, the output ratio of the multi-gear speed change gear box can be adjusted according to the needed ejection stroke during ejection, then the ejection distance of the ejector pin is changed, the moving stroke range of the ejector pin can be adjusted according to needs, the variable-speed ejection structure is reasonable and compact, the space utilization rate can be well increased, and the service life of the ejector pin is prolonged. And the method has good applicability.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and more specifically to a variable speed ejection structure of an injection mold. Background Art

[0002] In the field of injection molds, multiple speed-changing ejection operations may be required in some special scenarios. For example, Chinese patent CN201510014973.5 discloses a slider differential secondary ejection mechanism, which provides a differential ejection structure with two strokes. However, this structure still has many limitations, especially in the coordination between the slider and the inclined ejector. The speed is difficult to control, the precision requirement is high, and the design is difficult. Different products need to be specially redesigned, and the applicability is poor. Therefore, a variable speed ejection structure for an injection mold that is easier to control and has good applicability is needed. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an injection mold variable speed ejection structure in view of the above-mentioned defects of the prior art.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A variable speed ejection structure for an injection mold is constructed, wherein the structure comprises a rear mold B plate, a pad plate, an ejector plate, an ejector back plate and a code plate arranged in sequence; the code plate is connected to the pad plate through a plurality of support blocks; the structure further comprises an ejector and a guide sleeve for guiding the ejector, an opening for the ejector to move is arranged on the assembly formed by the rear mold B plate and the pad plate, and the guide sleeve is arranged in the opening; a mounting seat is arranged on the lower surface of the pad plate, and a multi-speed gearbox is arranged on the mounting seat; an output gear is arranged at the output end of the multi-speed gearbox, and an input gear is arranged at the input end; a first longitudinal rack meshing with the output gear is fixed to the side surface of the ejector, and a second longitudinal rack meshing with the input gear is arranged on the ejector plate.

[0006] The variable speed ejection structure of the injection mold described in the utility model, wherein a cross bar is arranged on the mounting seat, and the two ends of the cross bar are rotatably connected with a first clamping wheel and a second clamping wheel; the first clamping wheel and the second clamping wheel are respectively used to limit the ejector pin and the second rack.

[0007] The variable speed ejection structure of the injection mold of the utility model is characterized in that the mounting seat and the backing plate are detachably connected by screws.

[0008] The variable speed ejection structure of the injection mold of the utility model is characterized in that the ejector plate is provided with a first avoidance hole for avoiding the ejector.

[0009] The variable speed ejection structure of the injection mold of the utility model is characterized in that the pad is provided with a second avoidance hole for avoiding the second rack.

[0010] The variable speed ejection structure of the injection mold described in the utility model further comprises a lifting cylinder, the movable end of the lifting cylinder is connected to the lower surface of the ejector back plate through a ejector rod, and the code template is provided with a movable hole corresponding to the ejector rod.

[0011] The beneficial effect of the utility model is that by applying the variable speed ejection structure of the present application, the output ratio of the multi-speed gearbox can be adjusted according to the required ejection stroke during ejection, thereby changing the ejection distance of the ejector pin, so that the moving stroke range of the ejector pin can be adjusted as needed, the structure is reasonable and compact, the utilization rate of the space can be well improved, and the utility model has good applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work:

[0013] Figure 1 It is a schematic diagram of the variable speed ejection structure of the injection mold in a preferred embodiment of the utility model. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the following will be combined with the technical solution in the embodiments of the utility model for a clear and complete description. Obviously, the described embodiments are partial embodiments of the utility model, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0015] The variable speed ejection structure of the injection mold in the preferred embodiment of the utility model is as follows Figure 1As shown, it includes a rear mold B plate 1, a pad plate 2, an ejector plate 3, an ejector backing plate 4 and a code template 5 which are arranged in sequence; the code template 5 is connected to the pad plate 2 through a plurality of support blocks 6; the structure also includes an ejector 7 and a guide sleeve 8 for guiding the ejector, and an opening for the ejector 7 to move is provided on the assembly formed by the rear mold B plate 1 and the pad plate 2, and the guide sleeve 8 is arranged in the opening; a mounting seat 20 is provided on the lower surface of the pad plate 2, and a multi-speed gearbox 9 is provided on the mounting seat 20; an output gear 90 is provided at the output end of the multi-speed gearbox 9, and an input gear 91 is provided at the input end; a first longitudinal rack 70 meshing with the output gear 90 is fixed to the side surface of the ejector 7, and a second longitudinal rack 30 meshing with the input gear 91 is provided on the ejector plate 3;

[0016] By applying the variable speed ejection structure of the present application, the output ratio of the multi-speed gearbox 9 can be adjusted according to the required ejection stroke during ejection, thereby changing the ejection distance of the ejector pin 7, so that the moving stroke range of the ejector pin 7 can be adjusted as needed. The structure is reasonable and compact, can well improve the utilization rate of space, and has good applicability.

[0017] Preferably, a cross bar 21 is provided on the mounting seat 20, and the two ends of the cross bar 21 are rotatably connected with a first clamping wheel 22 and a second clamping wheel 23; the first clamping wheel 22 and the second clamping wheel 23 are respectively used to limit the position of the ejector pin 7 and the second rack 30; the structure is reasonable and compact, and the first clamping wheel 22 and the second clamping wheel 23 are respectively used to limit the position of the ejector pin 7 and the second rack 30, so as to ensure the stability of the engagement at the two places.

[0018] Preferably, the mounting seat 20 and the backing plate 2 are detachably connected by screws, which is convenient for assembly and disassembly. Of course, it can be understood that in addition to the assembly and disassembly by screws, other existing connection and fixing methods can also be used, and this is not limited.

[0019] Preferably, the ejector plate 3 is provided with a first avoidance hole 31 for avoiding the ejector 7, and the pad 2 is provided with a second avoidance hole 24 for avoiding the second rack 30; adopting this avoidance hole design can further reduce the overall height, making the structure more compact.

[0020] Preferably, the structure further comprises a lifting cylinder, the movable end of which is connected to the lower surface of the ejector back plate 4 via a ejector rod 10, and a movable hole 50 corresponding to the ejector rod 10 is provided on the code template 5; the structure has good driving reliability and is easy to set up.

[0021] It should be understood that those skilled in the art can make improvements or changes based on the above description, and all these improvements and changes should fall within the scope of protection of the claims attached to the utility model.

Claims

1. An injection mold variable speed ejection structure, characterized in that: The invention comprises a rear mold B plate, a pad plate, an ejector plate, an ejector back plate and a code plate which are arranged in sequence; the code plate is connected to the pad plate through a plurality of support blocks; the structure also comprises an ejector and a guide sleeve for guiding the ejector, an opening for the ejector to move is arranged on the assembly formed by the rear mold B plate and the pad plate, and the guide sleeve is arranged in the opening; a mounting seat is arranged on the lower surface of the pad plate, and a multi-speed gearbox is arranged on the mounting seat; an output gear is arranged at the output end of the multi-speed gearbox, and an input gear is arranged at the input end; a first longitudinal rack meshing with the output gear is fixed on the side surface of the ejector, and a second longitudinal rack meshing with the input gear is arranged on the ejector plate.

2. The variable speed ejection structure of the injection mold according to claim 1, characterized in that: The mounting seat is provided with a cross bar, and the two ends of the cross bar are rotatably connected with a first clamping wheel and a second clamping wheel respectively; the first clamping wheel and the second clamping wheel are used to limit the ejector pin and the second rack respectively.

3. The variable speed ejection structure of the injection mold according to claim 2, characterized in that: The mounting seat and the backing plate are detachably connected via screws.

4. The variable speed ejection structure of the injection mold according to claim 1, characterized in that: The ejector plate is provided with a first avoidance hole for avoiding the ejector.

5. The variable speed ejection structure of the injection mold according to claim 4, characterized in that: The backing plate is provided with a second avoidance hole for avoiding the second rack.

6. The variable speed ejection structure of the injection mold according to claim 1, characterized in that: The structure also includes a lifting cylinder, the movable end of the lifting cylinder is connected to the lower surface of the ejector back plate through a push rod, and the code template is provided with a movable hole corresponding to the push rod.

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