Front mold ejection opening and closing device

Abstract

The utility model discloses a front mold ejection opening and closing device, including a fixed mold plate, a movable mold plate, a front mold shovel base, a slider mounting seat, a guide slider, a guide spring, a small ejector plate, and a hook rod. The upper end of the front mold shovel base is fixed on the fixed mold plate, the slider mounting seat is installed in the movable mold plate, the lower end of the front mold shovel base passes through the slider mounting seat and the guide slider slidably connected in the slider mounting seat in the longitudinal direction, the inner end of the guide slider is clamped with the lower end of the hook rod, the outer end of the guide slider is pressed against the inner end of the guide spring, the upper end of the hook rod is fixed on the small ejector plate, and the small ejector plate is movably sleeved in the groove of the fixed mold plate. The utility model can pull the small ejector plate and automatically disengage it, so as to achieve the purpose of not needing to design an oil cylinder or a spring, thereby greatly simplifying the mold structure, improving the overall quality and service life of the mold, reducing costs, and reducing maintenance, thereby improving production efficiency.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to a front mold ejection opening and closing device. Background Art

[0002] When a plastic product has undercuts in the front mold direction, the traditional method is to design a slider or a tilting ejector to meet the design needs of this type of product demoulding. However, when the amount of undercuts on the plastic product is relatively large, a slider or a tilting ejector is required. When the front mold of a plastic product has many undercuts in different directions, a tilting ejector with a larger stroke needs to be designed. However, in this case, conventional spring ejection is no longer applicable, and a hydraulic cylinder needs to be used to assist ejection, which increases processing and production costs. Utility Model Content

[0003] The utility model aims to provide a front mold ejection, opening and closing mold device with a simple structure.

[0004] To achieve the above purpose, the technical solution of the utility model is:

[0005] The utility model is a front mold ejection opening and closing device, comprising a fixed mold plate, a movable mold plate, a front mold shovel base, a slider mounting seat, a guide slider, a guide spring, a small ejector plate, and a hook rod;

[0006] The upper end of the front mold shovel base is fixed on the fixed mold plate, the slider mounting seat is installed in the movable mold plate, the lower end of the front mold shovel base passes through the slider mounting seat and the guide slider slidably connected in the slider mounting seat in the longitudinal direction, the inner end of the guide slider passes through one side of the slider mounting seat in the transverse direction, the inner end of the guide slider is clamped with the lower end of the hook rod, the outer end of the guide slider is against the inner end of the guide spring, the outer end of the guide spring is against the slider mounting seat, the upper end of the hook rod is fixed on the small top plate, and the small top plate is movably sleeved in the groove of the fixed mold plate.

[0007] A longitudinal groove and a transverse groove are provided on the slider mounting seat; the middle parts of the longitudinal groove and the transverse groove are vertically connected to each other; the longitudinal groove allows the front mold shovel base to penetrate into, and the guide slider is slidably connected in the transverse groove. A guide groove is provided in the middle part of the guide slider, and the front mold shovel base penetrates into the longitudinal groove from top to bottom and then penetrates into the guide groove on the guide slider.

[0008] The lower end of the front mold shovel base is provided with a chamfer, and the chamfer abuts against the inclined surface of the guide groove on the guide slider, thereby driving the guide slider to move.

[0009] After adopting the above scheme, since the hook rod on the fixed mold plate will hook the guide slider when the utility model opens the mold, the movable mold plate and the small top plate are in a relatively static state. When the fixed mold plate and the movable mold plate are pulled apart for a distance, the front mold shovel base contacts the guide slider, and the front mold shovel base drives the guide slider to move outward, so that the hook rod is out of contact with the guide slider, and the fixed mold plate and the movable mold plate are further pulled apart to take out the product. When the front mold of the product has an undercut and a large stroke of the inclined top needs to be designed, the utility model can pull the small top plate and automatically disengage, so as to achieve the purpose of not needing to design a cylinder or spring, thereby greatly simplifying the mold structure, improving the overall quality and service life of the mold, reducing costs, and reducing maintenance, thereby improving production efficiency.

[0010] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a mold closing state diagram of the utility model;

[0012] Figure 2 yes Figure 1 A local enlarged view at point A;

[0013] Figure 3 This is a mold opening state diagram of the utility model;

[0014] Figure 4 It is an axonometric view of the utility model in the mold closing state;

[0015] Figure 5 It is an axonometric view of the utility model in the mold opening state;

[0016] Figure 6 It is a three-dimensional exploded view of the utility model. DETAILED DESCRIPTION

[0017] like Figure 1-Figure 6 As shown, the utility model is a front mold ejection opening and closing device, comprising a fixed mold plate 1, a movable mold plate 2, a front mold shovel base 3, a slider mounting seat 4, a guide slider 5, a guide spring 6, a small ejector plate 7, a hook rod 8, and an insert 9.

[0018] The upper end of the front mold shovel base 3 is fixed to the fixed mold plate 1 through an insert 9, and the slider mounting seat 4 is installed in the movable mold plate 2. The lower end of the front mold shovel base 3 passes through the slider mounting seat 4 and the guide slider 5 slidably connected in the slider mounting seat 4 in the longitudinal direction, and the inner end of the guide slider 5 passes through one side of the slider mounting seat 4 in the transverse direction. The inner end of the guide slider 5 is clamped with the lower end of the hook rod 8, and the outer end of the guide slider 5 is against the inner end of the guide spring 6. The outer end of the guide spring 6 is against the groove wall of the transverse groove 42 of the slider mounting seat 4. The upper end of the hook rod 8 is fixed on the small top plate 7, and the small top plate 7 is movably sleeved in the groove 11 of the fixed mold plate 1.

[0019] The slider mounting seat 4 is provided with a longitudinal groove 41 and a transverse groove 42; the middle parts of the longitudinal groove 41 and the transverse groove 42 are vertically connected to each other; the longitudinal groove 41 allows the front mold shovel base 3 to penetrate, and the guide slider 5 is slidably connected in the transverse groove 42. A guide groove 51 is provided in the middle part of the guide slider 5. The front mold shovel base 3 penetrates into the longitudinal groove 41 from top to bottom and then penetrates into the guide groove 51 on the guide slider 5. The lower end of the front mold shovel base 3 has a chamfer 31, and the chamfer 31 abuts against the inclined surface 52 of the guide groove on the guide slider 5, thereby driving the guide slider to move.

[0020] The working principle of this utility model:

[0021] When opening the mold, the hook rod 8 on the fixed mold plate 1 will hook the outer end of the guide slider 5, and the movable mold plate 8 and the small top plate 7 are in a relatively static state. When the fixed mold plate 1 and the movable mold plate 2 are pulled apart for a distance, the front mold shovel base 3 contacts the guide slider 5, and the front mold shovel base 3 drives the guide slider 5 to move outward, so that the hook rod 8 is out of contact with the guide slider 5, and the fixed mold plate 1 and the movable mold plate 2 are further pulled apart. After the fixed mold plate 1 and the movable mold plate 2 are fully opened, the product is taken out.

[0022] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of the patent application of the present invention and the contents of the specification should still fall within the scope covered by the patent of the present invention.

Claims

1. A front mold ejection opening and closing device, characterized in that: It includes a fixed mold plate, a movable mold plate, a front mold shovel base, a slider mounting seat, a guide slider, a guide spring, a small top plate, and a hook rod; The upper end of the front mold shovel base is fixed on the fixed mold plate, the slider mounting seat is installed in the movable mold plate, the lower end of the front mold shovel base passes through the slider mounting seat and the guide slider slidably connected in the slider mounting seat in the longitudinal direction, the inner end of the guide slider passes through one side of the slider mounting seat in the transverse direction, the inner end of the guide slider is clamped with the lower end of the hook rod, the outer end of the guide slider is against the inner end of the guide spring, the outer end of the guide spring is against the slider mounting seat, the upper end of the hook rod is fixed on the small top plate, and the small top plate is movably sleeved in the groove of the fixed mold plate.

2. The front mold ejection and opening and closing device according to claim 1, characterized in that: A longitudinal groove and a transverse groove are provided on the slider mounting seat; the middle parts of the longitudinal groove and the transverse groove are vertically connected to each other; the longitudinal groove allows the front mold shovel base to penetrate into, and the guide slider is slidably connected in the transverse groove. A guide groove is provided in the middle part of the guide slider, and the front mold shovel base penetrates into the longitudinal groove from top to bottom and then penetrates into the guide groove on the guide slider.

3. The front mold ejection and opening and closing device according to claim 1 or 2, characterized in that: The lower end of the front mold shovel base is provided with a chamfer, and the chamfer abuts against the inclined surface of the guide groove on the guide slider, thereby driving the guide slider to move.

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