Demolding mechanism for bottle cap with deeper inner inverted buckle

Abstract

The demolding mechanism comprises a first sliding block assembly, a first push plate, a second sliding block assembly, a second push plate and a shoveling machine, the first sliding block assembly is fixedly connected with the first push plate, the second sliding block assembly is fixedly connected with the second push plate, the first push plate is detachably connected with the second push plate, and the shoveling machine is detachably connected with the first push plate. The bottle cap is formed at the top of the shoveling machine in an injection molding mode, the first sliding block assembly, the second sliding block assembly and the shoveling machine are matched, a demolding ejector rod is arranged in the injection molding machine and is in driving connection with the first push plate, and the demolding ejector rod can drive the first push plate to move to drive the second push plate to move so as to drive the first sliding block assembly to retract inwards and drive the second sliding block assembly to retract inwards. And after the first push plate and the second push plate are separated, the first sliding block assembly can be continuously driven to retract inwards to complete the demolding operation of the bottle cap. The mold has the beneficial effects that segmented ejection can be achieved to complete demolding operation of the bottle cap, and the stability of the product quality and the product competitiveness are improved.

Description

Technical Field

[0001] The invention relates to the technical field of precision manufacturing equipment, and in particular to a demoulding mechanism of a bottle cap with a deep inner inverted buckle. Background Art

[0002] The demoulding mechanism is a mechanical device that allows plastic products to be separated from the manufacturing mold. During injection molding, plastic parts with lateral protrusions or grooves are often encountered. When the size of the protrusion or lateral groove is large, a lateral core pulling mechanism is generally required to realize the demoulding of the plastic part. When the size of the protrusion or lateral groove is small, the elastic deformation of the plastic part can be used for forced demoulding. In order to facilitate the demoulding of plastic products and prevent the surface of the product from being scratched during demoulding, the surface of the plastic part parallel to the demoulding direction should generally have a reasonable demoulding slope.

[0003] Bottle caps have certain requirements for beauty and practicality, so many bottle caps have a deep inverted design, and some even have an entire circle of inverted design. Currently, there are usually two ways to demould this type of plastic product.

[0004] One demoulding method is to use a slider + inclined ejector combination structure for demoulding. The specific implementation method is generally that the ejector plate is ejected, and the buckle machine drives the push plate to move 20MM together. The shovel machine is fixed on the support plate, driving the 4 inner sliders to retreat 5MM, and then the ejector plate continues to eject 60MM, driving the inclined ejector to retreat 7MM. This method requires an inclined ejector, which increases the square iron and ejector plate. The mold thickness will be much larger, and there are many accessories related to the inclined ejector, such as an inclined ejector guide block, an inclined ejector seat, etc. If a multi-hole product is made, the mold will be very large, resulting in an increase in the cost of the mold, and the matching injection molding machine will also become larger, and the subsequent injection molding production cost will also increase simultaneously.

[0005] Another demoulding method is to use explosive demoulding, where all the sliders are installed on a layer of template, and a shovel drives all the inner sliders to retract synchronously. There are fewer parts and the space is compact; however, the slider's retraction stroke is limited, and generally only undercuts within 5MM can be removed. If the product's inner hole is small, the retraction stroke will be more cramped. In the field of bottle caps, most of the bottle caps have an inward buckle of more than 5MM, and because a certain safety distance is required, the slider needs to retract more than 8MM, making it difficult to apply the explosive demoulding method to bottle caps. Summary of the invention

[0006] To solve the problems in the prior art, the present invention provides a demolding mechanism for a bottle cap with a relatively deep internal undercut. By arranging a first slider assembly, a first push plate, a second slider assembly, a second push plate and a lifter that cooperate with each other in the demolding mechanism of the bottle cap with a relatively deep internal undercut, the demolding ejector rod can drive the first push plate to move, drive the second push plate to move, and then drive the first slider assembly to contract and the second slider assembly to contract. Moreover, after the first push plate and the second push plate are separated, it can continue to drive the first push plate to move and drive the first slider assembly to contract to complete the demolding operation of the bottle cap, improving the stability of product quality and product competitiveness, greatly reducing the overall size of the mold, and solving the problems of large volume, high cost and difficulty in adopting the explosion-proof demolding method in the prior art of the bottle cap demolding mechanism.

[0007] A demolding mechanism for a bottle cap with a relatively deep internal undercut provided by the present invention includes a first slider assembly, a first push plate, a second slider assembly, a second push plate and a lifter. The first slider assembly is fixedly connected to the first push plate, the second slider assembly is fixedly connected to the second push plate, the first push plate is detachably connected to the second push plate, the bottle cap is injection-molded on the top of the lifter, the first slider assembly, the second slider assembly and the lifter cooperate with each other, and a demolding ejector rod is arranged in the injection molding machine. The demolding ejector rod is drivingly connected to the first push plate. The demolding ejector rod can drive the first push plate to move, drive the second push plate to move, and then drive the first slider assembly to contract and the second slider assembly to contract. Moreover, after the first push plate and the second push plate are separated, it can continue to drive the first push plate to move and drive the first slider assembly to contract to complete the demolding operation of the bottle cap.

[0008] The present invention is further improved. The first slider assembly includes 4 cooperating T-shaped sliders. The 4 T-shaped sliders are respectively detachably connected to the first push plate. The 4 T-shaped sliders are arranged around the lifter and cooperate with the lifter.

[0009] The present invention is further improved. The second slider assembly includes 4 cooperating straight sliders. The 4 straight sliders are respectively detachably connected to the second push plate. The 4 straight sliders are arranged around the lifter and cooperate with the lifter.

[0010] The present invention is further improved. A latch is arranged between the first push plate and the second push plate. The first push plate and the second push plate are snap-connected through the latch.

[0011] The present invention is further improved and further includes a bottom plate. The bottom of the lifter is fixedly arranged on the bottom plate. The first push plate is slidably connected to the bottom plate, and the second push plate is slidably connected to the bottom plate.

[0012] The present invention is further improved in that the demoulding ejector rod is driven by a hydraulically driven cylinder or a driving motor.

[0013] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention provides a demoulding mechanism for a bottle cap with a deeper inverted buckle, by arranging a first slider assembly, a first push plate, a second slider assembly, a second push plate and a shovel that cooperate with each other in the demoulding mechanism for the bottle cap with a deeper inverted buckle, the demoulding ejector rod can drive the first push plate to move, drive the second push plate to move, and then drive the first slider assembly to retract and the second slider assembly to retract, and can continue to drive the first push plate to move and retract the first slider assembly to complete the demoulding operation of the bottle cap after the first push plate is separated from the second push plate, by installing the first slider assembly on the first push plate and the second slider assembly on the second push plate, the demoulding operation of the bottle cap can be completed by segmented ejection, the bottle cap will not be damaged, the stability of product quality and the competitiveness of the product are improved, the demoulding effect of the traditional slider + inclined ejector demoulding structure is achieved, and the overall size of the mold is greatly reduced, and the problems of large size, high cost and difficulty in adopting explosive demoulding method of the bottle cap demoulding mechanism in the prior art are solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the solutions in the present application or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0015] Figure 1 It is a cross-sectional structural diagram of the demoulding mechanism of the bottle cap with a relatively deep inner inverted buckle according to the present invention; Figure 2 It is a cross-sectional structural diagram of the demoulding mechanism of the bottle cap with a relatively deep inner inverted buckle according to the present invention; Figure 3 It is a cross-sectional structural diagram of the demoulding mechanism of the bottle cap with a deeper inner inverted buckle according to the present invention.

[0016] In the figure, 1-first slider assembly, 11-B-shaped slider, 2-first push plate, 3-second slider assembly, 31-straight slider, 4-second push plate, 5-shovel machine, 6-mold ejector rod, 7-lock machine, 8-bottom plate. DETAILED DESCRIPTION

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of this application; the terms used in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit the application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0018] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0019] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings.

[0020] like Figure 1-Figure 3 As shown, the present invention provides a demoulding mechanism for a bottle cap with a deeper inverted inner buckle, comprising a first slider assembly 1, a first push plate 2, a second slider assembly 3, a second push plate 4 and a shovel 5, the first slider assembly 1 is fixedly connected to the first push plate 2, the second slider assembly 3 is fixedly connected to the second push plate 4, the first push plate 2 and the second push plate 4 are detachably connected, the bottle cap is injection molded on the top of the shovel 5, the first slider assembly 1, the second slider assembly 3 and the shovel 5 cooperate with each other, a demoulding ejector rod 6 is provided in the injection molding machine, and the demoulding ejector rod 6 is drivingly connected to the first push plate 2. In the present embodiment, the demoulding ejector rod can drive the first push plate to move, drive the second push plate to move, and then drive the first slider assembly and the second slider assembly to retract, and can continue to drive the first push plate to move and retract the first slider assembly after the first push plate is separated from the second push plate to complete the demoulding operation of the bottle cap. By installing the first slider assembly on the first push plate and the second slider assembly on the second push plate, the demoulding operation of the bottle cap can be completed by segmented ejection without causing damage to the bottle cap, thereby improving the stability of product quality and product competitiveness, achieving the demoulding effect of the traditional slider + inclined ejector demoulding structure, and greatly reducing the overall size of the mold.

[0021] like Figure 1-Figure 3As shown in the figure, the first slider assembly 1 includes four cooperating T-shaped sliders 11. The four T-shaped sliders 11 are respectively detachably connected to the first push plate 2. The four T-shaped sliders 11 are arranged around the shovel 5 and cooperate with the shovel 5. The second slider assembly 3 includes four cooperating straight plate sliders 31. The four straight plate sliders 31 are respectively detachably connected to the second push plate 4. The four straight plate sliders 31 are arranged around the shovel 5 and cooperate with the shovel 5. A buckle 7 is provided between the first push plate 2 and the second push plate 4. The first push plate 2 and the second push plate 4 are snap-connected through the buckle 7. It further includes a bottom plate 8. The bottom of the shovel 5 is fixedly arranged on the bottom plate 8. The first push plate 2 is slidably connected to the bottom plate 8, and the second push plate 4 is slidably connected to the bottom plate 8. The demolding ejector rod 6 is driven by a hydraulic drive cylinder or a drive motor. In this embodiment, after the injection molding, cooling and shaping are completed on the outer surface of the shovel of the injection molding machine for the bottle cap, the demolding mechanism for the bottle cap with a relatively deep internal undercut starts to work. The demolding ejector rod pushes the first push plate forward. Since the first push plate and the second push plate are connected by a buckle, the first push plate and the second push plate move forward synchronously by 20 MM. At this time, the first slider assembly and the second slider assembly contract inward at the same time. After the buckle is disengaged, the second push plate stops, and the second slider assembly no longer contracts inward. The first push plate continues to move forward by 60 MM. At this time, the first slider assembly continues to contract inward, and the bottle cap can be easily pushed out and detached, completing the entire demolding operation of the bottle cap.

[0022] As can be seen from the above, the present invention provides a demolding mechanism for a bottle cap with a relatively deep internal undercut. By arranging a first slider assembly, a first push plate, a second slider assembly, a second push plate and a shovel that cooperate with each other in the demolding mechanism for the bottle cap with a relatively deep internal undercut, the demolding ejector rod can drive the first push plate to move, drive the second push plate to move, and then drive the first slider assembly and the second slider assembly to contract inward. Moreover, it can continue to drive the first push plate to move and drive the first slider assembly to contract inward after the first push plate and the second push plate are separated to complete the demolding operation of the bottle cap. By installing the first slider assembly on the first push plate and the second slider assembly on the second push plate, it can realize segmented ejection to complete the demolding operation of the bottle cap, will not cause damage to the bottle cap, improve the stability of product quality and product competitiveness, not only achieve the demolding effect of the traditional slider + inclined ejector demolding structure, but also greatly reduce the overall size of the mold, and solve the problems of large volume, high cost and difficulty in using the explosion-proof demolding method in the existing technology for the bottle cap demolding mechanism.

[0023] The above-described specific implementation manners are the preferred implementation manners of the present invention, and do not limit the specific implementation scope of the present invention. The scope of the present invention includes but is not limited to this specific implementation manner. All equivalent changes made in accordance with the present invention are within the protection scope of the present invention.

Claims

1. A demoulding mechanism for a bottle cap with a deep inner inverted buckle, arranged on an injection molding machine for the bottle cap, characterized in that: It includes a first slider assembly, a first push plate, a second slider assembly, a second push plate and a stripper. The first slider assembly is fixedly connected to the first push plate, the second slider assembly is fixedly connected to the second push plate, the first push plate is detachably connected to the second push plate, a bottle cap is injection-molded on the top of the stripper, the first slider assembly, the second slider assembly and the stripper cooperate with each other. There is a demolding ejector rod in the injection molding machine, the demolding ejector rod is drivingly connected to the first push plate, and the demolding ejector rod can drive the first push plate to move, drive the second push plate to move, thereby drive the first slider assembly to retract and the second slider assembly to retract, and can continue to drive the first push plate to move to drive the first slider assembly to retract to complete the demolding operation of the bottle cap after the first push plate and the second push plate are separated.

2. The demoulding mechanism of the bottle cap with a deep inner undercut according to claim 1, characterized in that: The first slider assembly includes 4 cooperating T-shaped sliders, and the 4 T-shaped sliders are respectively detachably connected to the first push plate. The 4 T-shaped sliders are arranged around the stripper and cooperate with the stripper.

3. The demoulding mechanism of the bottle cap with a deep inner undercut according to claim 2, characterized in that: The second slider assembly includes 4 cooperating straight plate sliders, and the 4 straight plate sliders are respectively detachably connected to the second push plate. The 4 straight plate sliders are arranged around the stripper and cooperate with the stripper.

4. The demoulding mechanism of the bottle cap with a deep inner undercut according to claim 3, characterized in that: There is a latch between the first push plate and the second push plate, and the first push plate and the second push plate are snap-connected through the latch.

5. The demoulding mechanism of the bottle cap with a deep inner undercut according to claim 4, characterized in that: It further includes a bottom plate. The bottom of the stripper is fixedly arranged on the bottom plate. The first push plate is slidably connected to the bottom plate, and the second push plate is slidably connected to the bottom plate.

6. The demoulding mechanism of the bottle cap with a relatively deep inner undercut according to claim 5, characterized in that: The demolding ejector rod is driven by a hydraulic drive cylinder or a drive motor.

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