Undercut demoulding mechanism in narrow space

Abstract

The utility model relates to the field of mold technology, and in particular to a narrow space undercut demoulding mechanism. It includes an upper mold and a lower mold correspondingly arranged above and below, and is characterized in that: the upper mold includes an upper mold plate, a female mold plate installed under the upper mold plate by equal height screws, a female mold core installed on the female mold plate, a male mold slider wedge installed on the upper mold plate by a first fixing screw, and a female mold slider wedge installed on the upper mold plate by a second fixing screw; the lower mold includes a lower mold plate, a lower fixed plate arranged on the lower mold plate, and a male mold core arranged on the lower fixed plate, and a female mold core cavity is opened in the female mold core. The benefits of the utility model: This technical solution, according to the toughness of the product, sets two groups of different sliders to push the product upside down to produce deformation at one time, so that the product can be demoulded by undercutting, and the structure is simple, unrestricted, flexible and changeable, which greatly improves efficiency.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to an undercut demoulding mechanism in a narrow space. Background Art

[0002] There is a plastic product that cannot be demoulded normally after injection molding due to many protruding corners. In addition, the existing mold design has a small space, and the inclined pins and sliders are either weak in structure, affecting the mold life, or the mold structure cannot be implemented, which limits the product design.

[0003] Therefore, it is necessary to design a narrow space undercut demoulding mechanism to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide an undercut demoulding mechanism in a narrow space to overcome the above-mentioned shortcomings of the current prior art.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A narrow space undercut demoulding mechanism, comprising an upper mold and a lower mold correspondingly arranged above and below, characterized in that: the upper mold comprises an upper mold plate, a female mold plate installed under the upper mold plate by equal height screws, a female mold core installed on the female mold plate, a male mold slider wedge installed on the upper mold plate by a first fixing screw, and a female mold slider wedge installed on the upper mold plate by a second fixing screw; the lower mold comprises a lower mold plate, a lower fixing plate arranged on the lower mold plate, and a male mold core arranged on the lower fixing plate; a female mold core cavity is opened in the female mold core, and a female mold core cavity is opened in the female mold core A mother mold slider that can slide left and right is provided, the mother mold slider is placed on one side of the mother mold slider wedge block, and the mother mold slider is inclined on one side close to the mother mold slider wedge block, and the mother mold slider wedge block is provided with an inclined protrusion on one side close to the mother mold slider, and the other side of the mother mold slider is connected with the inner buckle of the mother mold core cavity, a male mold core cavity is opened in the male mold core, and a male mold slider is provided on the side of the male mold core; a protrusion is provided on one end of the male mold slider close to the male mold core, and one side of the protrusion is connected with the male mold core cavity of the male mold core, and the other end is connected with the female mold core cavity of the female mold core.

[0007] Preferably, the inclination of the inclined protrusion is the same as the inclination of the inclined surface of the master mold slider.

[0008] Preferably, the upper surface of the protrusion is placed below the bottom surface of the wedge block of the master mold slider.

[0009] Preferably, the surface of the male mold slider that contacts the wedge block of the male mold slider is an inclined surface.

[0010] Preferably, an ejector plate is further provided below the male mold core.

[0011] The beneficial effects of the utility model are as follows: according to the toughness of the product, the technical solution sets two groups of different sliders to push the product upside down at one time to produce deformation, so that the product can be demoulded by the inverted buckle, the structure is simple, unrestricted, flexible and changeable, and the efficiency is greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a structural schematic diagram of a narrow space undercut demoulding mechanism of the utility model;

[0013] Figure 2 This is a schematic diagram of the first mold opening of a narrow space undercut demoulding mechanism of the utility model;

[0014] Figure 3 This is a second mold opening schematic diagram of a narrow space undercut demoulding mechanism of the utility model;

[0015] Figure 4 This is a schematic diagram of the mold opening completion of a narrow space undercut demoulding mechanism of the utility model;

[0016] Figure 5 It is a schematic diagram of the male and female mold cores of a narrow space undercut demoulding mechanism of the utility model;

[0017] In the figure: 1, upper template; 2, equal height screws; 3, female template; 4, female mold core; 5, first fixing screw; 6, male mold slider wedge; 7, second fixing screw; 8, female mold slider wedge; 9, lower template; 10, lower fixing plate; 11, male mold core; 41, female mold core cavity; 42, female mold slider; 111, male mold core cavity; 112, male mold slider; 113, bump; 12, ejector plate. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0019] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0020] Reference Figures 1 to 5 , a narrow space undercut demoulding mechanism, which includes an upper mold and a lower mold correspondingly arranged up and down;

[0021] The upper mold includes an upper mold plate 1, a female mold plate 3 installed under the upper mold plate through equal height screws 2, a female mold core 4 installed on the female mold plate, a male mold slider wedge 6 installed on the upper mold plate through a first fixing screw 5, and a female mold slider wedge 8 installed on the upper mold plate through a second fixing screw 7;

[0022] The lower mold comprises a lower mold plate 9, a lower fixing plate 10 arranged on the lower mold plate, and a male mold core 11 arranged on the lower fixing plate;

[0023] A mother mold core cavity 41 is provided in the mother mold core 4, and a mother mold slider 42 that can slide left and right is provided in the mother mold core 4; the mother mold slider 42 is placed on one side of the mother mold slider wedge block 8, and the mother mold slider 42 is inclined on a side close to the mother mold slider wedge block 8, and the mother mold slider wedge block 8 is provided with an inclined protrusion on a side close to the mother mold slider 42, and the inclination of the inclined protrusion is the same as the inclination of the inclined side of the mother mold slider 42;

[0024] The other end of the mother mold slider 42 is connected to the inner buckle of the mother mold core cavity 41;

[0025] A male mold core cavity 111 is provided in the male mold core 11, and a male mold slider 112 is provided beside the male mold core 11; a convex block 113 is provided at one end of the male mold slider close to the male mold core 112, one side of the convex block 113 is connected to the male mold core cavity 111 of the male mold core, and the other end is connected to the female mold core cavity 41 of the female mold core 4, and the upper surface of the convex block 113 is placed below the bottom surface of the wedge block 8 of the female mold slider;

[0026] The surface of the male mold slider 112 that contacts the male mold slider wedge 6 is an inclined surface;

[0027] An ejector plate 12 is also provided below the male mold core;

[0028] In this implementation case, the upper fixed plate is separated from the mother mold, driving the mother mold slider wedge and the male mold slider wedge to retreat, and the male mold slider wedge drives the male mold slider to retreat; the slope set on the mother mold slider wedge drives the mother mold slider to move forward, and the front end of the mother mold slider pushes against the product undercut b18 and retreats, causing the product elastic arm 17 to deform; the upper fixed plate and the mother mold continue to separate, at this time the head of the equal height screw contacts the fixed plate, the male mold slider continues to retreat, and the mother mold slider continues to move forward, pushing against the product undercut b18 and continuing to retreat, and the deformation of the product elastic arm 17 increases. The product undercut b18 is completely separated from the mother mold core in the demoulding direction

[0029] Mold opening: Because the head of the equal height screw contacts the upper fixed plate, the upper fixed plate and the female mold plate retreat at the same time, driving the female mold core, female mold slider wedge, female mold slider, and male mold slider wedge to retreat. The male mold slider wedge drives the male mold slider to continue to retreat, and the male mold slider is completely separated from the molded product; the product elastic arm 17 returns to the initial test state without the force of the female mold slider. At this time, the molded product can be taken out and the next cycle can be carried out.

[0030] The utility model is beneficial in that the technical solution, according to the toughness of the product, sets two groups of different sliders to push the product upside down at one time to produce deformation, thereby enabling the product to be demoulded by inverting, and the structure is simple, unrestricted, flexible and changeable.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A narrow space undercut demoulding mechanism, comprising an upper mold and a lower mold correspondingly arranged up and down, characterized in that: The upper mold includes an upper mold plate, a female mold plate installed under the upper mold plate by equal height screws, a female mold core installed on the female mold plate, a male mold slider wedge installed on the upper mold plate by a first fixing screw, and a female mold slider wedge installed on the upper mold plate by a second fixing screw. The lower mold includes a lower mold plate, a lower fixing plate arranged on the lower mold plate, and a male mold core arranged on the lower fixing plate. A female mold core cavity is opened in the female mold core, and a female mold slider that can slide left and right is arranged in the female mold core. The female mold core The mold slider is placed on one side of the wedge block of the female mold slider, and the female mold slider is inclined on one side close to the wedge block of the female mold slider, and an inclined protrusion is provided on one side of the wedge block of the female mold slider close to the female mold slider, and the other side of the female mold slider is connected with the inner buckle of the female mold core cavity, a male mold core cavity is opened in the male mold core, and a male mold slider is provided on the side of the male mold core; a protrusion is provided on one end of the male mold slider close to the male mold core, and one side of the protrusion is connected with the male mold core cavity of the male mold core, and the other end is connected with the female mold core cavity of the female mold core.

2. The narrow space undercut demoulding mechanism according to claim 1, characterized in that: The inclination of the inclined protrusion is the same as the inclination of the inclined surface of the master mold slider.

3. The narrow space undercut demoulding mechanism according to claim 1, characterized in that: The upper surface of the protrusion is placed below the bottom surface of the wedge block of the master mold slider.

4. The narrow space undercut demoulding mechanism according to claim 1, characterized in that: The surface of the male mold slider that contacts the wedge of the male mold slider is an inclined surface.

5. The narrow space undercut demoulding mechanism according to claim 1, characterized in that: An ejector plate is also arranged below the male mold core.

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