Demolding pull block and guide rail separating and resetting structure of automobile bumper injection mold

Abstract

The utility model relates to the technical field of automobile injection molding part production, in particular to a demoulding pull block and guide rail separating and resetting structure of an automobile bumper injection mold, which comprises an inclined ejector rod (7), a pull block rod (3), a guide rail (4), a large inclined ejector (5) and a pull block (6), and is characterized by further comprising a distance screw (1) and a spring (2). The purpose of shortening the design length of the guide rail can be easily achieved only by adding the distance screw, the spring and other simple components, the related technical problems are solved, the function is reliable and safe, stability and durability are achieved, and manufacturing is convenient.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of automobile injection molding production, especially to automobile bumper injection mold stripping pull block and guide rail disengagement and reset structure. BACKGROUND

[0002] The injection molding parts such as automobile bumpers are often complex in shape, especially in the case of having inclined buckle reverse buckle structure, the injection mold generally adopts the usual inclined top structure, and also needs to adopt guide rail structure, through the cooperation of pull block rod and guide rail, the injection molding part inclined buckle can be smoothly stripped out during stripping. The effective height of the guide rail of the conventional guide rail structure needs to be consistent with the ejection stroke of the large inclined top of the injection molding machine, to ensure that the pull block rod does not disengage from the guide rail during ejection, and completes the related core pulling or deformation action. However, in the case that the pull block position needs to be relatively high, the effective height of the guide rail needs to be much higher than the ejection stroke of the large inclined top, or the guide rail will be interfered by the adjacent components, and cannot be designed to have the effective height consistent with the ejection stroke of the large inclined top of the injection molding machine, the pull block rod usually needs to be designed eccentrically, or a large force is needed to be designed on the large inclined top block. In this case, the stability of the mold stripping action is poor, the strength of the large inclined top block is weakened, and the cooling design difficulty is increased, which often becomes a technical problem. UTILITY MODEL CONTENTS

[0003] In view of the deficiencies of the prior art, the utility model aims to provide a kind of automobile bumper injection mold stripping pull block and guide rail disengagement and reset structure, increase fixed distance screw and spring on pull block, when pull block rod disengages from guide rail, ensure that the position of pull block rod remains unchanged;When reset again, through the guide slope on pull block guide rail, pull block rod smoothly enters pull block guide rail, which shortens the design length of guide rail, to solve the above technical problems.

[0004] The technical scheme adopted by the utility model is as follows:

[0005] The utility model discloses a kind of automobile bumper injection mould stripping pull block and guide rail disengagement and reset structure, including inclined ejector rod, pull block rod, guide rail, big inclined ejector and pull block, it is characterized by further including fixed distance screw and spring, the big inclined ejector is equipped with pull block cavity and pull block rod hole, the inclined ejector rod is sleeved and is installed in inclined sleeve on movable die fixed plate, upper end is connected with big inclined ejector, lower end is connected with ejection plate, the pull block is installed in the pull block cavity of big inclined ejector, the guide rail and pull block rod are connected with each other respectively with guide rail and guide groove corresponding, the guide rail is fixed on movable die fixed plate, the pull block rod is sleeved in the pull block rod hole of big inclined ejector, and can move along guide rail, and its head end is also fixedly connected with pull block, the pull block is provided with step hole and spring hole, the fixed distance screw is movably inserted into the step hole of pull block, and end portion is fixedly connected with big inclined ejector, the big inclined ejector is also provided with spring hole corresponding to pull block spring hole, the spring is positioned and installed in pull block spring hole and big inclined ejector spring hole, and the spring is abutted between pull block and big inclined ejector.

[0006] The guide rail corresponds to the inclination of the inclined ejector rod, and is provided with a slope 4a at the upper end.

[0007] The automobile bumper injection mould stripping pull block and guide rail disengagement and reset structure of the utility model has ingenious conception, scientific design, reasonable structure, and can shorten the design length of guide rail by only adding fixed distance screw and spring and the like simple components, to solve relevant technical problems, and is reliable and safe in action, stable and durable, and convenient to manufacture. BRIEF DESCRIPTION OF DRAWINGS

[0008] The drawings described herein are used to provide further understanding of the present application, and form part of the present application.

[0009] Figure 1 It is a cross-sectional view of the automobile bumper injection mould stripping pull block and guide rail disengagement and reset structure of the utility model;

[0010] Figure 2 It is a cross-sectional view of the prior art automobile bumper injection mould stripping pull block and guide rail disengagement and reset structure;

[0011] Figure 3 It is Figure 2 It is a first-step form schematic view of the inclined buckle stripping of the injection molded part in the overhead direction;

[0012] Figure 4 It is Figure 2 It is a second-step form schematic view of the inclined buckle stripping of the injection molded part in the overhead direction;

[0013] In the figure: 1- distance screw, 2- spring, 3- pull block rod, 4- guide rail, 4a- slope, 5- large inclined top, 5a- component partial, 6- pull block, 7- inclined top rod, 8- inclined sleeve, H- height, L- distance, P- product (injection molded part), P1- inclined buckle, M1- direction one, M2- direction two. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described below are only used to explain the utility model, and in these descriptions, the key words to be noted include "inclined buckle", "component partial" and "interference", etc. These are only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as a limitation on the utility model.

[0015] The prior art produces an automobile bumper injection molded part P, which is a reverse buckle P1 that is released when demolding, and a conventional guide rail structure, as shown in Figure 2 , only includes an inclined top rod 7, a pull block rod 3, a guide rail 4, a large inclined top 5 and a pull block 6. The large inclined top 5 is provided with a pull block cavity and a pull block rod hole. The inclined top rod 7 is sleeved and installed in an inclined sleeve 8 on a movable mold fixed plate. The upper end is connected with the large inclined top 5, and the lower end is connected with an ejection plate. The pull block 6 is installed in the pull block cavity of the large inclined top 5. The guide rail 4 and the pull block rod 3 are respectively provided with corresponding guide rails and guide grooves connected with each other. The guide rail 4 is fixed on the movable mold fixed plate of the injection molding machine. The pull block rod 3 is sleeved in the pull block rod hole of the large inclined top 5 and can move along the guide rail 4. The head end is also fixedly connected with the pull block 6. When demolding, the ejection plate is upwardly ejected, and then the inclined top rod 7 is inclinedly ejected along the inclined sleeve 8 to the large inclined top 5 and the injection molded part P. Referring to Figure 3 , due to the action of the inclined upward movement of the inclined top rod 7, the pull block 6 is moved upward in the first step along with the large inclined top 5, and also releases the inclined buckle P1 of the injection molded part P in the direction one M1 as shown in Figure 3 . Then, referring to Figure 4 , since the pull block 6 is also constrained by the connected pull block rod 3 and guide rail 4, it is moved upward in the second step along with the large inclined top 5, and then releases the inclined buckle P1 of the injection molded part P in the direction two M2, so that the mold can completely release the inclined buckle P1 of the injection molded part P. During the entire ejection process, the pull block rod is not released from the guide rail.

[0016] The embodiment still takes the production of the automobile bumper injection molding part P as an example, the automobile bumper injection mold stripping pull block and guide rail disengaging and resetting structure of the utility model, the basic part is similar to the traditional guide rail structure, including the inclined ejector rod 7, the pull block rod 3, the guide rail 4, the large inclined top 5 and the pull block 6, the large inclined top 5 is equipped with pull block cavity and pull block rod hole, their structure, connection and function are basically similar to the traditional guide rail structure, for the sake of making the specification concise, therefore, it is not repeated here. Figure 1 As will be interfered by the component local 5a, the guide rail 4 height H value can not be designed to be large enough (high), and it cannot correspond to the ejection stroke of the large inclined top 5, therefore, the difference of the utility model lies in that the relatively complex and unstable structure is refused to be used, but ingeniously further includes the fixed distance screw 1 and the spring 2, the pull block 6 is provided with the stepped hole and the spring hole, the fixed distance screw 1 is movably inserted into the stepped hole of the pull block 6, and the end is fixedly connected with the large inclined top 5. Figure 2 The large inclined top 5 is also provided with the spring hole, and the spring hole corresponds to the pull block 6 spring hole, and the spring 2 is positioned and installed in the pull block 6 spring hole and the large inclined top 5 spring hole, that is, the spring 2 is abutted between the pull block 6 and the large inclined top 5. Figure 1 When stripping, due to the action of the inclined ejector rod 7 moving obliquely upward, the large inclined top 5 is pushed to move obliquely upward (including the upward and rightward two decomposition movements of the view direction), and the pull block 6 is also moved in the first step movement of the large inclined top 5, and is disengaged from the inclined buckle P1 of the injection molding part P in the direction M1 as shown. Figure 2 At this time, due to the action of the spring 2, and the pull block rod 3 can only move vertically upward along the guide rail 4, the pull block 6 does not completely move rightward with the large inclined top 5 as described above, but tends to disengage the large inclined top 5 in the opposite direction, and the maximum disengagement stroke is the distance L, which is beneficial to disengage the inclined buckle P1 of the injection molding part P in the direction M1. Figure 4 As shown, although the pull block 6 is connected with the pull block rod 3 and the guide rail 4, and is restricted in the second step movement of the large inclined top 5, when the pull block 6 exceeds the top end of the guide rail 4, it will be disengaged from the guide rail 4, but still moves in the direction M2 to disengage the inclined buckle P1 of the injection molding part P, at this time, the fixed distance screw 1 (cooperating with the spring 2) pulls the pull block 6, so that it cannot completely disengage the large inclined top 5, and can continue to move in the direction M2 with the large inclined top 5 until the mold can completely disengage the inclined buckle P1 of the injection molding part P.

[0017] The injection molding part P is demolded, and the utility model needs to reset. The pull block 6 is located in the oblique upper side of the guide rail 4, and is not contacted with the guide rail 4 and is restrained, but is reset along the oblique downward movement track of the big oblique top 5, because the guide rail 4 corresponds to the oblique degree of the oblique top rod 7 (the oblique degree of the big oblique top 5 to the oblique downward movement track), is provided with the inclined plane 4a at the upper end, is favorable to the pull block 6 can reenter the track of the guide rail 4 more smoothly, completes the reset to the oblique downward.

[0018] The above only is the general implementation of the utility model, for the person skilled in the art, the utility model can have various changes and other implementation ways of change, and the utility model does not repeat here. Any modification, equivalent replacement, improvement etc. within the spirit and principle of the utility model are included in the protection scope required by the utility model.

Claims

1. A structure for separating and resetting the demoulding pull block and guide rail of an automobile bumper injection mould, comprising an inclined ejector rod (7), a pull block rod (3), a guide rail (4), a large inclined ejector (5) and a pull block (6), characterized in that, It also includes distance screw (1) and spring (2), the big angle (5) is equipped with pull block cavity and pull block rod hole, the angle top rod (7) is sleeved and installed in the angle sleeve (8) on the movable mold fixed plate, the upper end is connected with the big angle (5), the lower end is connected with the ejection plate, the pull block (6) is installed in the pull block cavity of the big angle (5), the guide rail (4) and pull block rod (3) are connected respectively with corresponding guide rail and guide groove, the guide rail (4) is fixed on the movable mold fixed plate, the pull block rod (3) is sleeved in the pull block rod hole of the big angle (5), the head end is also fixedly connected with the pull block (6), the pull block (6) is provided with step hole and spring hole, the distance screw (1) is movably inserted into the step hole of the pull block (6), and the end is fixedly connected with the big angle (5), the big angle (5) is also provided with spring hole corresponding to the spring hole of the pull block (6), the spring (2) is positioned and installed in the spring hole of the pull block (6) and the spring hole of the big angle (5), and the spring (2) abuts against between the pull block (6) and the big angle (5).

2. The demoulding puller block and guide rail disengaging and resetting structure of an automobile bumper injection mould according to claim 1, characterized in that, The guide rail (4) corresponds to the slope of the angle top rod (7), and is provided with a slope (4a) at the upper end.

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