CN210679560U - Injection mold for improving demolding of high rib position - Google Patents

Abstract

An injection mold for improving high rib position demolding comprises a rear mold, wherein the rear mold comprises a rear mold core, a rear mold frame and a movable ejection pin, and the rear mold core is arranged on the rear mold frame; the movable ejection pin is arranged on the rear mold core to slide, and comprises a mold core part and a first hanging table part protruding outwards, and the mold core part is used for forming a high rib position and a deep groove of an injection molding product in a matched manner with the rear mold core; the rear mold core is provided with a sliding groove, and the first hanging table part of the movable ejection pin is limited to slide in the sliding groove. The injection molding machine solves the problems that when an injection molding product with a high rib position with high drop is subjected to mold stripping, the high rib position is difficult to be subjected to mold stripping due to extrusion of a mold steel material on the high rib position, and the high rib position is damaged due to large ejection force.

Description

Injection mold for improving demolding of high rib position

Technical Field

The utility model belongs to the technical field of the mould is moulded plastics, a injection mold is related to, specifically is an injection mold who relates to a high muscle position drawing of patterns of improvement, to the improvement structure of high muscle position deciduate difficulty in injection mold.

Background

The reinforcing rib is used for supporting and reinforcing one structural type in the main part, and the reinforcing rib is an indispensable functional part on the plastic part, can increase product rigidity and intensity and need not to increase product tangent plane area by a wide margin, and is especially important to some plastic products that often receive pressure, torsion, crooked, and in addition, the reinforcing rib more can act as the internal flow way, helps the die cavity to fill, plays very big effect to the support festival part that helps the plastic to flow into the part.

In the design process of the injection mold, generally, the ratio of the height of the rib position to the thickness of the rib is 3: 1, shrinkage can be caused if the proportion is too high, the demolding problem exists in the too large proportion, the rib positions of different plastics are different in design by adopting different standards, different draft angles are placed according to the shrinkage of the different plastics, and the ejection pin or flat top auxiliary demolding can be adopted according to the different rib position depths as necessary.

At present, for injection products with the characteristics of dense rib positions, high-fall rib positions and the like, the injection products are subjected to demolding at the positions by adopting a dense ejector pin, a straight ejector, an inclined ejector or a secondary ejection mode, and the existing ejection mode has the disadvantages of difficult processing, position limitation, high processing cost and long mold manufacturing period.

Aiming at dense rib positions and high-fall rib positions, the common demolding and ejecting mode is insufficient, the side face of each rib position is easy to be stuck on a mold during ejection of an injection molding part, deformation is generated due to stress and pulling during ejection, and the surface is ejected white, so that the ejection height and ejection are difficult.

As shown in fig. 1, an injection molded product 10 is provided, in the injection molded product 10, at high rib positions 101 with a high head, the high rib positions 101 are relatively dense, the ratio of the height of the high rib positions 101 to the rib thickness is relatively large, deep grooves 102 are formed between the high rib positions 101, and when the injection molded product 10 is demolded, due to the fact that the side surfaces of the high rib positions 101, namely the side wall area of the deep grooves 102, is relatively large, a relatively large adhesive force can be generated between the high rib positions 101 and a mold, the high rib positions 101 can be pulled, and problems such as deformation and surface whitening can be generated.

SUMMERY OF THE UTILITY MODEL

To the technical problem that exists among the prior art, the utility model aims at providing an injection mold of high muscle position drawing of patterns of improvement solves the injection product that has the high muscle position of high drop when the demolding, and the extrusion of mould steel material to high muscle position leads to high muscle position drawing of patterns difficulty, and the damage problem that the ejection force caused to high muscle position greatly.

In order to achieve the above object, the present invention is achieved by the following technical solutions.

The technical proposal of the utility model is to provide an injection mold for improving high rib position demolding, which comprises a rear mold,

the rear die comprises a rear die core, a rear die frame and a movable ejection pin, and the rear die core is arranged on the rear die frame;

the movable ejection pin is arranged on the rear mold core to slide, and comprises a mold core part and a first hanging table part protruding outwards, and the mold core part is used for forming a high rib position and a deep groove of an injection molding product in a matched manner with the rear mold core;

the rear mold core is provided with a sliding groove, and the first hanging table part of the movable ejection pin is limited to slide in the sliding groove.

The principle of the technical scheme is that when the rear mold opens the mold along the parting surface, an ejection system of the injection mold ejects an injection product, due to the wrapping force of the high rib position, the high rib position and the deep groove position of the injection product can wrap the movable ejection pin tightly to drive the movable ejection pin to move along with the injection of the product, the high rib position and the rear mold core are staggered, the wrapping force of the injection product after the injection product is separated from the rear mold core can be weakened, namely after the high rib position completely leaves the rear mold core, the movable ejection pin stops moving due to the limiting reasons of the hanging table part and the sliding groove, and the injection product continues to eject under the ejection acting force, so that the injection product finally is separated from the movable ejection pin.

The technical effect of the technical scheme is that the problem that two side surfaces of a high rib position are simultaneously stressed to generate deformation when the demoulding is carried out once is solved, the two side surfaces are separated step by step, and the phenomena of deformation and whitening caused by pulling are prevented.

In an example of the technical solution, the movable ejector pin is further provided with a second table hanging part, the second table hanging part and the first table hanging part are located on two opposite sides of the movable ejector pin, the second table hanging part is provided with a reset pressure lever, and the reset pressure lever is used for resetting to an initial position after the movable ejector pin slides and displaces.

When the injection mold is closed, the parting surface is closed, the front mold can press the reset ejector rod, and the movable ejector pin is reset.

In one example of the technical scheme, the mold further comprises a slide rail, wherein the slide rail is fixedly connected to the rear mold core or the rear mold frame;

the second hanging table part of the movable ejection pin is provided with a slide rail groove which is concave inwards, and the slide rail groove is matched with the slide rail to enable the movable ejection pin to slide along the slide rail.

In an example of the technical scheme, the injection molding machine further comprises an ejector pin or an ejection straight pin, wherein the ejector pin or the ejection straight pin is movably arranged on the rear mold core and used for ejecting an injection molding product from the rear mold core during demolding.

In one example of the technical scheme, the rear mold further comprises a rear mold bottom plate, square iron, an ejector plate and a rear mold plate;

the square iron is installed on the die bottom plate, the rear template is installed on the square iron, and the ejector plate is movably arranged between the rear template and the rear die bottom plate;

the rear die carrier is arranged on the rear die plate, and the ejector pin or the ejection straight pin is connected to the ejection plate.

In one example of the technical scheme, the mold further comprises a front mold, wherein the front mold comprises a front mold core, a front mold plate and a front mold panel;

the front mold core is arranged on the front mold plate, the front mold plate is arranged on the front mold panel, and a glue injection channel which penetrates through the front mold core, the front mold plate and the front mold panel is arranged on the front mold.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments of the present invention will be briefly introduced below, and the drawings in the following description are only directed to some embodiments, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is a structural view of an injection-molded product in the embodiment of the present application.

Fig. 2 is a view of a mounting structure of a movable ejector pin in the embodiment of the present application.

Fig. 3 is an exploded view of fig. 2.

Fig. 4 is a structural view of a rear mold in the embodiment of the present application.

Fig. 5 is an exploded view of an injection mold in an embodiment of the present application.

Fig. 6 is a view of the mounting structure of the movable ejector pin and the reset lever in the embodiment of the present application.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent, and is not within the scope of the present disclosure.

In the following description, suffixes such as "module", "part", "assembly", or "unit" are used only for convenience of description of the present invention, and do not have a specific meaning by themselves, and thus may be used mixedly.

The present invention will be described in further detail with reference to the following detailed description of preferred embodiments and accompanying drawings.

Examples

As shown in fig. 2 to 6, which are drawings of the embodiment of the present invention, the embodiment provides an injection mold for improving demolding at a high rib position, which includes a rear mold and a front mold.

The rear mould comprises a rear mould core 21, a rear mould frame 22, a rear mould bottom plate 26, square iron 25, an ejector plate 24, a rear mould plate 23, an ejector pin 27, an ejector straight pin 28, a movable ejector pin 30 and a slide rail 31, wherein the square iron is arranged on the mould bottom plate, the rear mould plate is arranged on the square iron, and the ejector plate is movably arranged between the rear mould plate and the rear mould bottom plate; the rear mold core is arranged on the rear mold base, the rear mold base is arranged on the rear mold plate, the lower ends of the ejector pins and the ejection straight pins are connected to the ejector plate, and the ejector pins or the ejection straight pins are movably arranged on the rear mold core and used for ejecting the injection molding product 10 out of the rear mold core during demolding.

The front mould comprises a front mould core 41, a front mould plate 42 and a front mould panel 43; the front mold core is arranged on the front mold plate, the front mold plate is arranged on the front mold panel, a glue injection channel which penetrates through the front mold core, the front mold plate and the front mold panel is arranged on the front mold, and a glue injection nozzle 44 is also arranged in the glue injection channel and used for injecting glue into an injection molding cavity formed by the front mold and the rear mold.

The movable ejector pin 30 is disposed on the rear mold core 21 to slide, and the movable ejector pin 30 includes a mold core portion 301 and a first hanging portion 302 protruding outward, and the mold core portion is used for forming the high rib portion 101 and the deep groove 102 of the injection molding product 10 in cooperation with the rear mold core. The rear core 21 is provided with a slide groove 211, and the first hooking part 301 of the movable ejector pin 30 is limited to slide in the slide groove 211.

Specifically, the number of the movable ejection pins 30 may be multiple, and the number and the positions of the movable ejection pins 30 are determined according to the positions of the high rib positions and the deep grooves of the injection molding product 10, for example, the movable ejection pins 30 may be clamped between the rear mold core 21 and the rear mold frame 22, or may be completely disposed in the rear mold core 21, and the upper ends of the movable ejection pins 30 are mold core portions serving as a part of the injection molding cavity and used for forming the high rib positions and the deep grooves of the injection molding product in cooperation with the rear mold core.

The movable ejector pin 30 is further provided with a second hooking base 303, the second hooking base 303 and the first hooking base 302 are located on opposite sides of the movable ejector pin 30, and the second hooking base 303 is provided with a return pressure lever 304 for returning to an initial position after the movable ejector pin 30 is slidably displaced.

In the present embodiment, the first hanging table portion and the second hanging table portion are formed by protruding outward from the movable ejector pin, and are an integrated structure, and in other embodiments, the first hanging table portion or the second hanging table portion may also be formed by a component assembled to the movable ejector pin, and have at least the same function.

The slide rail 31 is fixedly connected to the rear mold core 21 or the rear mold frame 22; the second hooking portion 303 of the movable ejector pin 30 is provided with a slide groove 305 recessed inward, and the movable ejector pin 30 can slide along the slide rail 31 by the cooperation of the slide groove 305 and the slide rail 31.

When the rear mold opens the mold along the parting surface, the ejection system of the injection mold ejects an injection product, due to the wrapping force of the high rib position, the high rib position and the deep groove position of the injection product can wrap the movable ejection pin tightly to drive the movable ejection pin to move along with the product injection molding, the high rib position and the rear mold core are staggered, the wrapping force of the injection product after the injection product is separated from the rear mold core can be weakened, namely after the high rib position completely leaves the rear mold core, the movable ejection pin stops moving due to the limiting reasons of the table hanging part and the sliding groove, the injection product continues to be ejected under the ejection acting force, and the injection product finally is separated from the movable ejection pin.

When the injection mold is closed, the parting surfaces of the front mold and the rear mold are closed, the front mold can press the reset ejector rod, and the movable ejector pin is pushed to reset the movable ejector pin.

The two side surfaces of the high rib position are simultaneously stressed to generate deformation by pulling, and the two side surfaces are separated step by step, so that the phenomena of deformation and whitening caused by pulling are prevented. The injection mold of this embodiment has solved injection product through activity ejector pin when the demolding, and the extrusion of mould steel material to injection product high rib position, dark rib position demolding difficulty, because of the big damage problem that causes injection product of ejection force. The complex secondary ejection structure is simplified, and two ejector pin plates and a chain buckle structure are reduced, so that the manufacturing cost is greatly reduced.

In the description herein, references to the description of the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing is a more detailed description of the present invention that is presented in conjunction with specific embodiments, and it is not to be understood that the specific embodiments of the present invention are limited to these descriptions. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement.

Claims (6)

1. An injection mold for improving high rib position demolding, which comprises a rear mold and is characterized in that,

the rear die comprises a rear die core, a rear die frame and a movable ejection pin, and the rear die core is arranged on the rear die frame;

the movable ejection pin is arranged on the rear mold core to slide, and comprises a mold core part and a first hanging table part protruding outwards, and the mold core part is used for forming a high rib position and a deep groove of an injection molding product in a matched manner with the rear mold core;

the rear mold core is provided with a sliding groove, and the first hanging table part of the movable ejection pin is limited to slide in the sliding groove.

2. The improved high rib position demolding injection mold as claimed in claim 1,

the movable ejection pin is further provided with a second hanging table part, the second hanging table part and the first hanging table part are located on two opposite sides of the movable ejection pin, the second hanging table part is provided with a reset pressure rod, and the reset pressure rod is used for resetting an initial position after the movable ejection pin slides and displaces.

3. The injection mold with improved high rib position stripping as claimed in claim 2,

the sliding rail is fixedly connected to the rear die core or the rear die frame;

the second hanging table part of the movable ejection pin is provided with a slide rail groove which is concave inwards, and the slide rail groove is matched with the slide rail to enable the movable ejection pin to slide along the slide rail.

4. The improved high rib position demoulding injection mould according to any one of the claims 1 to 3,

the injection molding machine is characterized by further comprising an ejector pin or an ejection straight pin, wherein the ejector pin or the ejection straight pin is movably arranged on the rear mold core and used for ejecting an injection molding product from the rear mold core during demolding.

5. The improved high rib position demolding injection mold as claimed in claim 4,

the rear die also comprises a rear die bottom plate, square iron, an ejector plate and a rear die plate;

the square iron is installed on the die bottom plate, the rear template is installed on the square iron, and the ejector plate is movably arranged between the rear template and the rear die bottom plate;

the rear die carrier is arranged on the rear die plate, and the ejector pin or the ejection straight pin is connected to the ejection plate.

6. The improved high rib position demolding injection mold as claimed in claim 4,

the front mould comprises a front mould core, a front mould plate and a front mould panel;

the front mold core is arranged on the front mold plate, the front mold plate is arranged on the front mold panel, and a glue injection channel which penetrates through the front mold core, the front mold plate and the front mold panel is arranged on the front mold.

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