Angle pin for injection mold

Abstract

The utility model discloses an angle pin for an injection mold, which comprises an angle pin rod, and the lower end of the angle pin rod is provided with a slotted hole; a product modeling groove is formed in the left side end face of the upper end of the angle pin rod, a receding groove is formed in the right side end face of the upper end of the angle pin rod, an ejector rod mechanism capable of moving in the receding groove in the left-right direction is arranged in the receding groove, and in the natural state, an ejector rod of the ejector rod mechanism extends to the groove bottom of the product modeling groove. And when the ejector rod mechanism is stressed to move towards the product modeling groove, the ejector rod can extend into the product modeling groove. According to the utility model, the ejector rod mechanism is arranged in the angle pin rod, so that the defect that the angle pin pulls the shape of a product in the demolding process is overcome, and the damage to the formed product is effectively avoided, thereby effectively improving the percent of pass of the formed product and improving the quality.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection mold technical field, more particularly, relate to a kind of for injection mold inclined pin. BACKGROUND

[0002] Injection mold is a mold used in injection molding process, it is the mold used in plastic injection molding, and it is the tool for producing plastic products. Injection mold is usually composed of two parts of movable mold and fixed mold, forms mold cavity after clamping, and plastic material is injected into mold cavity under the pressure of injection molding machine, and the finished product can be taken out after cooling and solidification.

[0003] At present, when producing plastic products similar to Figure 1 , inclined pin mechanism is often used due to the modeling on the inner side of the product. Figure 2 As shown in the figure, in addition to assisting in the top forming of the product by moving in the direction of the vertical arrow, the inclined pin will move in the direction of the horizontal arrow to achieve demolding. However, in actual molding and demolding, the inclined pin often pulls the modeling during demolding, causing damage and affecting the molding qualification rate of the product. UTILITY MODEL CONTENTS

[0004] In order to solve the problems existing in the prior art, the utility model aims to provide an inclined pin for injection mold to overcome the pulling of the product modeling by the inclined pin during demolding and improve the molding qualification rate.

[0005] To achieve the above technical purposes and effects, the utility model realizes the following technical solutions:

[0006] An inclined pin for injection mold, comprising an inclined pin rod, a slot hole is formed in the lower end of the inclined pin rod; a product modeling groove is formed on the left side end face of the upper end of the inclined pin rod, and an avoidance groove is formed on the right side end face, a top rod mechanism movable in the left-right direction is arranged in the avoidance groove, in the natural state, the top rod of the top rod mechanism extends to the groove bottom of the product modeling groove, and when the top rod mechanism moves in the direction of the product modeling groove under force, the top rod can extend into the product modeling groove.

[0007] Further, the material of the inclined pin rod is SKD die steel.

[0008] Further, the slot hole is formed on one of the front and rear end faces of the inclined pin rod, and the slot hole is in communication with the left and right end faces of the inclined pin rod.

[0009] Further, the slot hole is inverted convex, penetrates the left and right end faces of the inclined pin rod, and the lower end face of the slot hole is in communication with the bottom face of the inclined pin rod.

[0010] Further, the inner groove bottom of the avoiding groove is provided with a threaded hole and a ejector rod hole, the ejector rod hole is communicated with the product molding groove bottom.

[0011] Further, the ejector rod mechanism comprises a movable block, a limiting bolt and the ejector rod are arranged in the movable block, the limiting bolt is slidably arranged in the movable block, and the ejector rod is fixedly connected with the movable block; the front end of the ejector rod is provided with a spring.

[0012] Further, the ejector rod is a stepped shaft, the stepped shaft comprises a first stepped section, a second stepped section and a third stepped section with gradually increasing diameters, the outer surface of the second stepped section is provided with threads, and the outer end surface of the third stepped section is provided with an inner hexagonal surface.

[0013] The beneficial effects of the present application are as follows: the present application sets the ejector rod mechanism in the inclined pin rod, overcomes the pulling of the product molding in the demolding process of the inclined pin, effectively avoids the damage to the molded product, thereby effectively improves the qualified rate of the molded product and improves the quality.

[0014] The above description is only a summary of the technical scheme of the present application, in order to more clearly understand the technical means of the present application, and the content of the specification can be implemented, the following will be described in detail with the preferred embodiment of the present application and the accompanying drawings. The specific implementation of the present application is given in detail by the following examples and their accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0015] The accompanying drawings described herein are used to provide further understanding of the present application, and constitute a part of the present application, the schematic embodiments of the present application and the description thereof are used to explain the present application, and do not constitute improper limitation on the present application. In the drawings:

[0016] Figure 1 It is the overall structure diagram of the inclined pin of the present application;

[0017] Figure 2 It is the top view of the inclined pin of the present application;

[0018] Figure 3 It is the Figure 2 A-A section view of the present application;

[0019] Figure 4 It is the Figure 2 B-B section view of the present application;

[0020] Figure 5 It is the first embodiment schematic diagram of the inclined pin rod of the present application;

[0021] Figure 6 It is the second embodiment schematic view of inclined pin rod of the utility model;

[0022] Figure 7 It is the structure schematic view of ejector rod mechanism of the utility model;

[0023] Figure 8 It is the first embodiment and pull rod connection schematic view of inclined pin rod of the utility model;

[0024] Figure 9 It is the second embodiment and pull rod connection schematic view of inclined pin rod of the utility model;

[0025] Figure 10 It is the first demolding stage schematic view of the utility model;

[0026] Figure 11 It is the second demolding stage schematic view of the utility model;

[0027] Figure 12 It is the third demolding stage schematic view of the utility model.

[0028] Mark explanation in drawing: 1, inclined pin rod; 2, ejector rod mechanism; 11, slot hole; 12, product modeling groove; 13, avoiding groove; 21, movable block; 22, limit bolt; 23, ejector rod; 24, spring; 131, first step section; 132, ejector rod hole; 231, first step section; 232, second step section; 233, third step section; 2331, inner hexagon. DETAILED DESCRIPTION

[0029] The utility model will be described in detail below in combination with embodiments and with reference to the drawings.

[0030] It should be noted that all directionality indications (such as up, down, left, right, front, back, top end, bottom end, top, bottom, etc.) in the embodiments of the utility model are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0031] Referring to Figures 1-4 As shown in the figure, an inclined pin for injection mold, comprising an inclined pin rod 1, the lower end of the inclined pin rod 1 is provided with a slot hole 11, the upper end side face of the inclined pin rod 1 is provided with product modeling groove 12 and the right side face is provided with avoiding groove 13, the avoiding groove 13 is provided with an ejector rod mechanism 2 that can move left and right in it, in the natural state, the ejector rod 23 belonging to the ejector rod mechanism 2 extends to the groove bottom of the product modeling groove 12, and when the ejector rod mechanism 2 moves to the product modeling groove 12 direction under force, the ejector rod 23 can extend into the product modeling groove 12.

[0032] Further, in the embodiment, the material of the inclined pin rod 1 is SKD61 die steel, but it is not limited to SKD61, and other die steels such as 718HH and 2344 can also be used. In actual selection, the material should be consistent with the movable die core (male die core). It should be noted that the inclined pin rod 1 needs to be heat treated during processing.

[0033] Further, referring to Figure 5 , in the embodiment, the slot hole 11 is arranged on one of the front and rear end faces of the inclined pin rod 1, and the slot hole 11 communicates with the left and right end faces of the inclined pin rod 1. Alternatively, referring to Figure 6 , the slot hole 11 is in the form of an inverted convex shape, penetrating through the left and right end faces of the inclined pin rod 1, and the lower end face of the slot hole 11 communicates with the bottom face of the inclined pin rod 1. During forming, referring to Figures 8-9 , the inclined pin rod 1 is connected with the pull rod through the slot hole 11, and the inclined pin rod 1 is driven to move in the die core by the pull rod to achieve demolding.

[0034] Further, referring to Figures 5-6 , in the embodiment, the inner groove bottom of the avoiding groove 13 is provided with a threaded hole 131 and a ejector rod hole 132, and the ejector rod hole 132 communicates with the groove bottom of the product molding groove 12. Referring to Figures 3-4 and Figure 7 , in the embodiment, the ejector rod mechanism 2 includes a movable block 21, a limiting bolt 22 and an ejector rod 23 arranged in the movable block 21. The limiting bolt 22 is slidably arranged in the movable block 21. In the embodiment, the ejector rod 23 is a stepped shaft including a first stepped section 231, a second stepped section 232 and a third stepped section 233 with increasing diameters. The outer surface of the third stepped section 233 is provided with threads. The ejector rod 23 is threadedly connected with the movable block 21 through the third stepped section 233, so that the ejector rod 23 is fixedly connected with the movable block 21. At this time, the first stepped section 231 is arranged outside the movable block 21, and the outer surface of the first stepped section 231 is sleeved with a spring 24. In the embodiment, in order to facilitate installation of the ejector rod 23, an inner hexagonal surface 2331 is arranged on the outer end face of the third stepped section 233.

[0035] During installation, referring to Figures 3-4As shown, the front end of the limiting bolt 22 is locked into the threaded hole 131, and the maximum displacement of the movable block 21 to the outside of the avoiding groove 13 is limited by the limiting bolt 22; the front end of the first stepped section 231 is slidably arranged in the top rod hole 132, at this time, the spring 24 is located between the avoiding groove 13 and the movable block 21, and the spring 24 has a tendency to drive the movable block 21 to move outward under the action of no external force; at this time, the top end of the first stepped section 231 is flush with the groove bottom of the product forming groove 12, and the movable block 21 and the groove bottom of the avoiding groove 13 are kept a moving distance, the nut of the limiting bolt 22 and the third stepped section 233 are both sunken into the movable block 21, and the movable block 21 is partially protruded from the avoiding groove 13, but the connection between the upper end surface and the right side surface is ensured not to protrude from the right side surface of the forming part 2.

[0036] The working principle of the utility model is as follows:

[0037] Referring to Figures 10-12 As shown (the label A in the figure represents a mold core; the label B in the figure represents a molded product; the label C in the figure represents the inclined pin of the application), during installation, the inclined pin is loaded in the mold core, at this time, the inclined pin hole in the mold core where the inclined pin is loaded is provided with a straight edge which is adapted to the movable block 21.

[0038] During demolding, the inclined pin of the application is driven by the pull rod to move outwardly from the mold core, at this time, the action of the inclined pin is divided into three stages:

[0039] Stage one, the movable block 21 is not completely separated from the straight edge in the mold core inclined pin hole, as shown in Figure 10 At this time, the inclined pin rod 1 will move to the right while sliding outwardly along the mold core inclined pin hole, thereby achieving demolding; at this time, the movable block 21 in the inclined pin rod 1 only slides outwardly from the mold core along with the inclined pin rod 1, but the relative position between the left and right sides does not change, thereby achieving that the front end of the top rod 23 always presses against the molded product during the demolding process, thereby preventing damage to the molded product caused by the molded product being pulled and stretched during the demolding process of the inclined pin; in this stage, the relative position between the left and right sides of the movable block 21 does not change, and the inclined pin rod 1 moves to the right, therefore, the movable block 21 moves relatively to the inside of the avoiding groove 13 in the avoiding groove 13, thereby further pressing the spring 24.

[0040] Stage two, the movable block 21 is separated from the straight edge in the mold core inclined pin hole, but is not completely separated from the mold core inclined pin hole, as shown in Figure 11As shown, at this time, with the inclined pin sliding upward along the inclined pin hole of the mold core, the inclined pin rod 1 will continue to move rightward, and continue to be demolded; at this time, the movable block 21 arranged therein moves synchronously with the inclined pin rod 1, that is, synchronously with the inclined pin rod 1 sliding outward of the mold core, the movable block 21 moves rightward synchronously with the inclined pin rod 1; wherein, at this stage, the relative position of the movable block 21 in the avoiding groove 13 does not change.

[0041] Stage three, the movable block 21 is completely separated from the inclined pin hole of the mold core, as shown in Figure 12 As shown, at this time, with the inclined pin sliding upward along the inclined pin hole of the mold core, the inclined pin rod 1 will continue to move rightward, and continue to be demolded; at this time, the movable block 21 arranged therein moves synchronously with the inclined pin rod 1, that is, synchronously with the inclined pin rod 1 sliding outward of the mold core, the movable block 21 moves rightward synchronously with the inclined pin rod 1; wherein, at this stage, the relative position of the movable block 21 in the avoiding groove 13 does not change.

[0042] The preferred embodiments of the utility model have been described above, and are not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A bevel pin for injection molds, characterized in that: The device includes a slanted pin (1), the lower end of which has a slot (11); the upper left end face of the slanted pin (1) has a product shaping groove (12) and the right end face has a clearance groove (13). A push rod mechanism (2) that can move in the left and right directions is provided in the clearance groove (13). In the natural state, the push rod (23) of the push rod mechanism (2) extends to the bottom of the product shaping groove (12). When the push rod mechanism (2) is subjected to force and moves in the direction of the product shaping groove (12), the push rod (23) can extend into the product shaping groove (12).

2. The inclined pin for injection molds according to claim 1, characterized in that: The inclined pin (1) is made of SKD61 mold steel.

3. The inclined pin for injection molds according to claim 1, characterized in that: The slot (11) is formed on one of the front and rear end faces of the inclined pin (1), and the slot (11) is connected to the left and right end faces of the inclined pin (1).

4. The inclined pin for injection molds according to claim 1, characterized in that: The slot (11) is inverted convex and passes through the left and right end faces of the inclined pin (1), and the lower end face of the slot (11) is connected to the bottom face of the inclined pin (1).

5. The inclined pin for injection molds according to claim 1, characterized in that: The inner bottom of the clearance groove (13) is provided with a threaded hole (131) and a push rod hole (132), and the push rod hole (132) is connected to the bottom of the product molding groove (12).

6. The inclined pin for injection molds according to claim 1, characterized in that: The push rod mechanism (2) includes a movable block (21), a limiting bolt (22) and the push rod (23) are inserted inside the movable block (21), the limiting bolt (22) is slidably inserted into the movable block (21), and the push rod (23) is fixedly connected to the movable block (21); a spring (24) is sleeved on the front end of the push rod (23).

7. The inclined pin for injection molds according to claim 6, characterized in that: The top rod (23) is a stepped shaft, which includes a first stepped section (231), a second stepped section (232) and a third stepped section (233) with successively increasing diameters; the outer surface of the second stepped section (232) is provided with threads, and the outer end face of the third stepped section (233) is provided with an internal hexagon (2331).

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