Inverted-buckle forced-supporting mold stripping structure of rubber cover

Abstract

The utility model discloses a back-off forced-supporting mold stripping structure of a rubber cover. A mold core extending in the mold opening direction is arranged on a movable mold plate, a plurality of ejector rods are arranged in the mold core in a sliding mode, a mold core is arranged at the end of a fixed mold plate, a runner and a cavity are arranged on the mold core, and through holes matched with the mold core are formed in the mold core and the fixed mold plate and located below the cavity. The mold cavity is arranged at the end part, facing the stripper plate, of the fixed mold plate, the mold core is arranged on the movable mold plate, and the ejector rod is arranged in the mold core, so that an inverted cavity structure matched with a rubber cover product can be formed on the mold core, and a conventional secondary mold opening structure can be matched during mold opening; the mold stripping structure is simple, the action is efficient, the appearance area and the functional area of the rubber cover cannot be damaged, and the molding yield is high.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molds, in particular to an undercut strong ejection mold structure of a rubber cover. Background Art

[0002] In the production of some complex rubber covers, such as those with stepped or irregular structures at the ends of the rubber covers, or functional structures such as multiple buckles on the side walls, a slider is generally used on the mold to push the product away from the mold after the mold is opened. The slider needs to work closely with the mold opening mechanism to avoid damaging the workpiece. The core pulling and material pushing structure is relatively complex, and the machining and assembly accuracy requirements for the core and material pushing structure are relatively high, resulting in a high production cost. At the same time, the speed of mold opening and material pushing also needs to be controlled during production, resulting in low production efficiency and serious wear of key mechanisms, resulting in high mold repair and maintenance costs. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model provides an inverted strong-lifting mold-out structure for a rubber cover, which can cooperate with a conventional secondary mold opening structure when opening the mold, firstly pull the core out of the product, and then strongly lift the product out from the fixed mold plate / mold core. The mold-out structure is simple, the action is efficient, and the appearance area and functional area of ​​the rubber cover will not be damaged, and the molding yield rate is high.

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is as follows:

[0005] A reverse buckle strong ejection mold structure of a rubber cover, wherein the plastic mold is provided with a bottom plate, an ejector plate, a support plate, a movable mold plate, a fixed mold plate, a stripper plate and a panel in sequence, and a buckle machine is provided between the bottom plate or the ejector plate and the fixed mold plate. When the mold is opened, after the movable mold plate moves a certain distance relative to the fixed mold plate, the buckle machine can pull the fixed mold plate to move synchronously with the movable mold plate to leave the stripper plate, and the stripper plate can pull the fixed mold plate after it moves a certain distance under the action of a limiting member to separate it from the movable mold plate; wherein:

[0006] The movable platen is provided with a core extending in the mold opening direction, the core extending to the outside of the movable platen and the end contours thereof are adapted to the inner wall structure of the rubber cover, a plurality of first ejector rods extending in the same direction as the core are slidably mounted in the core, each of the first ejector rods passes through the movable platen and is mounted on the ejector plate;

[0007] A mold core is embedded in the end of the fixed mold plate away from the movable mold plate, and a connected flow channel and a cavity are arranged on the end of the mold core away from the movable mold plate, and the inner wall of the cavity is adapted to the outer contour of the rubber cover; through holes adapted to the core are arranged on the mold core and the fixed mold plate just below the cavity; when the mold is closed, the core can pass through the fixed mold plate and the mold core in turn and extend into the cavity, and when the mold is opened, a plurality of the first ejector pins can slide in the core under the action of external force to lift the rubber cover product at the end of the core from the mold core.

[0008] As a further elaboration of the above technical solution:

[0009] In the above technical solution, the core is a step structure with decreasing axial size, and the larger end portion thereof is detachably fixed on the movable template.

[0010] In the above technical solution, the end of the flow channel is a diving port structure, which obliquely passes through the mold core and extends to the side wall of the cavity; the ejector plate is provided with more than one second ejector rod extending along the mold opening direction, and each of the second ejector rods passes through the fixed mold plate and the mold core in turn and extends to the lower end of each of the flow channels.

[0011] In the above technical scheme, the buckle machine includes a positioning plate, a limit block and a push-pull rod which are arranged in sequence along the mold closing direction. The positioning plate is detachably fixed on the side wall of the ejector plate or the bottom plate. The limit block and the push-pull rod both extend to the outside of the movable template. The end of the push-pull rod is provided with a first protrusion extending in the same direction as the side wall facing the mold, and a slot is formed between the first protrusion and the limit block; a second protrusion is embedded on the side wall of the fixed template, and its end can match and extend into the slot, and the size of its end along the mold closing direction is smaller than the size of the slot along the mold closing direction. An elastic member is provided between the second protrusion and the fixed template, and the second protrusion can be pushed into the fixed template under the action of external force.

[0012] Compared with the prior art, the beneficial effect of the utility model lies in: by setting the cavity at the end of the fixed template facing the stripping plate, setting the core on the movable template, and arranging a push rod in the core, an inverted cavity structure that is adapted to the rubber cover product can be formed on the mold core, and the conventional secondary mold opening structure can be used when opening the mold. First, the core is pulled out of the product, and then the product is forcibly lifted out of the fixed template / mold core by the push rod. The demolding structure is simple, the action is efficient, and the appearance area and functional area of ​​the rubber cover will not be damaged, and the molding yield rate is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the structure of the rubber cover in this embodiment;

[0014] Figure 2Schematic diagram of the structure of this embodiment (the panel, stripping plate and support plate on one side are not shown);

[0015] Figure 3 yes Figure 2 A schematic diagram of the enlarged structure of the middle part A;

[0016] Figure 4 is a schematic diagram of the exploded structure of this embodiment (only one core is shown);

[0017] Figure 5 Schematic diagram of the structure of the mold core in this embodiment;

[0018] Figure 6 yes Figure 5 Schematic diagram of the enlarged structure of part B in the middle.

[0019] In the figure: 10, bottom plate; 20, ejector plate; 30, support plate; 40, movable template; 50, fixed template; 60, buckle machine; 70, core; 80, first ejector; 90, mold core; 91, runner; 92, cavity; 100, rubber cover product; 1, through hole; 2, positioning plate; 3, limit block; 4, push-pull rod; 401, first protrusion; 402, slot; 5, second protrusion; 6, second ejector. DETAILED DESCRIPTION

[0020] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0021] The embodiments described with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and cannot be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, "several" and "multiple" mean two or more, unless otherwise clearly and specifically defined. In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a communication between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances. In this application, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature can include the first and second features being in direct contact, or it can include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature "above", "above" and "above" the second feature include the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature "below", "below" and "below" the second feature include the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] Figure 1 The general structure of the rubber cover in this embodiment is shown. It can be seen that the upper end is a stepped and irregular appearance area, and the lower end is a functional area with a concave side wall and a convex positioning buckle. If a traditional inner top type demoulding structure is used, the demoulding structure is complicated and it is very easy to cause the convex buckle on the functional area to break or deform. Therefore, this embodiment adopts the following demoulding scheme:

[0023] like Figure 2-4As shown, an inverted strong ejection mold structure of a rubber cover, the mold is provided with a bottom plate 10, an ejector plate 20, a support plate 30, a movable mold plate 40, a fixed mold plate 50, a stripper plate and a panel in sequence, a buckle machine 60 is provided between the bottom plate 10 or the ejector plate 20 and the fixed mold plate 50, when the mold is opened, after the movable mold plate 40 moves a certain distance relative to the fixed mold plate 50, the buckle machine 60 can pull the fixed mold plate 50 to move synchronously with the movable mold plate 40 to leave the stripper plate, and the stripper plate can pull the fixed mold plate 50 after it moves a certain distance under the action of the limiter to separate it from the movable mold plate 40; wherein:

[0024] The movable platen 40 is provided with a core 70 extending in the mold opening direction. The core 70 extends to the outside of the movable platen 40 and its end profile is adapted to the inner wall structure of the rubber cover. A plurality of first ejector pins 80 extending in the same direction as the core 70 are slidably mounted. Each first ejector pin 80 passes through the movable platen 40 and is mounted on the ejector plate 20.

[0025] A mold core 90 is embedded in the end of the fixed mold plate 50 away from the movable mold plate 40, and a connected flow channel 91 and a cavity 92 are provided on the end of the mold core 90 away from the movable mold plate 40, and the inner wall of the cavity 92 is adapted to the outer contour of the rubber cover; a through hole 1 adapted to the core 92 is provided on the mold core 90 and the fixed mold plate 50 directly below the cavity 92; when the mold is closed, the core 70 can pass through the fixed mold plate 50 and the mold core 90 in turn and extend into the cavity 92, and when the mold is opened, a plurality of first ejector pins 80 can slide in the core 70 under the action of external force to lift the rubber cover product 100 at the end of the core 70 from the mold core 90.

[0026] Further, such as Figure 4 As shown, the core 70 is a step structure with decreasing axial size, and its larger end is detachably fixed on the movable mold plate 40.

[0027] It can be understood that the bottom end of the stepped structure core 70 is relatively more stable, which can ensure that it maintains stable dimensional accuracy during continuous molding production, ensure its relative position accuracy with the upper cavity 92 of the mold core 90, and ensure that the rubber cover product 100 maintains a stable wall thickness.

[0028] Furthermore, the end of the flow channel 91 is a diving port structure, which obliquely passes through the mold core 90 and extends to the side wall of the cavity 92; one or more second ejector rods 6 extending along the mold opening direction are provided on the ejector plate 20, and each second ejector rod 6 passes through the fixed mold plate 50 and the mold core 90 in turn and extends to the lower end of each flow channel 91.

[0029] It is understandable that the utility model adopts a diving port glue feeding structure, which can avoid leaving glue feeding marks on the upper appearance surface of the glue cover, and facilitate the glue to quickly and evenly fill the entire cavity 92, thereby improving molding efficiency and ensuring molding yield.

[0030] Furthermore, the locking machine 60 includes a positioning plate 2, a limit block 3 and a push-pull rod which are arranged in sequence along the mold closing direction. The positioning plate 2 is detachably fixed on the side wall of the ejector plate 20 or the bottom plate 10. The limit block 3 and the push-pull rod 4 both extend to the outside of the movable template 40. The end of the push-pull rod 4 is provided with a first protrusion 401 extending in the same direction as the side wall facing the mold, and a slot 402 is formed between the first protrusion 401 and the limit block 2; a second protrusion 5 is embedded on the side wall of the fixed template 50, and its end can match and extend into the slot 402, and the size of its end along the mold closing direction is smaller than the size of the slot 402 along the mold closing direction. An elastic member is provided between the second protrusion 5 and the fixed template 50, and the second protrusion 5 can be pushed into the fixed template 50 under the action of an external force.

[0031] The latch machine 60 is a main component on the mold for realizing staged mold opening so as to automatically pull open the functional panels on the fixed mold. Its structure and working principle belong to the common knowledge of technicians in this field and will not be described in detail here.

[0032] During operation, the mold opening force drives the bottom plate 10, the ejector plate 20, and the support plate 30 to drive the movable plate 40 to leave the fixed plate 50, and the movable plate 40 drives the core 70 thereon to withdraw from the cavity 92 in the mold core 90 away from the rubber cover product 100, and at the same time, the second protrusion 5 slides in the slot 402; after moving a certain distance, the first protrusion 401 is blocked by the second protrusion 5, and the fixed plate 50 is pulled down to separate from the stripping plate (not shown in the drawings), and at this time, the rubber cover product 100 on the mold core 90 is exposed. The driving force drives the first ejector pin 80 and the second ejector pin 6 to push the rubber cover product 100 and the sprue out of the mold core 90; the mold opening force continuously drives the movable mold to pull the fixed mold plate 50 away from the stripping plate, and the displacement limiting structure on the stripping plate pulls the fixed mold plate 50, so that the first protrusion 401 presses the second protrusion 5 into the fixed mold plate 50, and the fixed mold plate 50 cannot move forward, and the movable mold moves away from the fixed mold, realizing complete mold opening and simultaneously pushing the rubber cover product 100 out of the mold to realize demolding, which is convenient for subsequent operations.

[0033] The utility model arranges the cavity at the end of the fixed template facing the stripping plate, arranges the core on the movable template, and arranges a push rod in the core, so that an inverted cavity structure adapted to the rubber cover product can be formed on the mold core, and a conventional secondary mold opening structure can be used when opening the mold. First, the core is pulled out of the product, and then the product is forcibly lifted out of the fixed template / mold core by the push rod. The demoulding structure is simple, the action is efficient, and the appearance area and functional area of ​​the rubber cover will not be damaged, and the molding yield rate is high.

[0034] The above does not limit the technical scope of the present invention. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An inverted strong ejection mold structure of a rubber cover, wherein a bottom plate, an ejector plate, a support plate, a movable mold plate, a fixed mold plate, a stripper plate and a panel are sequentially arranged on the mold, and a buckle machine is arranged between the bottom plate or the ejector plate and the fixed mold plate. When the mold is opened, after the movable mold plate moves a certain distance relative to the fixed mold plate, the buckle machine can pull the fixed mold plate to move synchronously with the movable mold plate to leave the stripper plate, and the stripper plate can pull the fixed mold plate after it moves a certain distance under the action of a limiter to separate it from the movable mold plate; characterized in that: The movable platen is provided with a core extending in the mold opening direction, the core extending to the outside of the movable platen and the end contours thereof are adapted to the inner wall structure of the rubber cover, a plurality of first ejector rods extending in the same direction as the core are slidably mounted in the core, each of the first ejector rods passes through the movable platen and is mounted on the ejector plate; A mold core is embedded in the end of the fixed mold plate away from the movable mold plate, and a connected flow channel and a cavity are arranged on the end of the mold core away from the movable mold plate, and the inner wall of the cavity is adapted to the outer contour of the rubber cover; through holes adapted to the core are arranged on the mold core and the fixed mold plate just below the cavity; when the mold is closed, the core can pass through the fixed mold plate and the mold core in turn and extend into the cavity, and when the mold is opened, a plurality of the first ejector pins can slide in the core under the action of external force to lift the rubber cover product at the end of the core from the mold core.

2. The undercut strong ejection mold structure of the rubber cover according to claim 1, characterized in that: The core is a step structure with decreasing axial size, and the larger end of the core is detachably fixed on the movable template.

3. The undercut strong ejection mold structure of the rubber cover according to claim 1, characterized in that: The end of the flow channel is a diving port structure, which obliquely passes through the mold core and extends to the side wall of the cavity; the ejector plate is provided with more than one second ejector rod extending along the mold opening direction, and each of the second ejector rods passes through the fixed mold plate and the mold core in turn and extends to the lower end of each of the flow channels.

4. The undercut strong ejection mold structure of the rubber cover according to any one of claims 1 to 3, characterized in that: The buckle machine includes a positioning plate, a limit block and a push-pull rod which are arranged in sequence along the mold closing direction. The positioning plate is detachably fixed on the side wall of the ejector plate or the bottom plate. The limit block and the push-pull rod both extend to the outside of the movable template. The end of the push-pull rod is provided with a first protrusion extending in the same direction as the side wall facing the mold, and a slot is formed between the first protrusion and the limit block; a second protrusion is embedded on the side wall of the fixed template, and its end can match and extend into the slot, and the size of its end along the mold closing direction is smaller than the size of the slot along the mold closing direction. An elastic member is provided between the second protrusion and the fixed template, and the second protrusion can be pushed into the fixed template under the action of external force.

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