Pushing type demolding mechanism for injection mold

Abstract

The utility model discloses a pushing type demoulding mechanism for an injection mould, which is characterized in that a cavity is arranged on a lower mould, an installation space is arranged on any side of the cavity, an ejector rod demoulding mechanism is arranged in the installation space, the ejector rod demoulding mechanism extends into the cavity, and the ejector rod demoulding mechanism comprises a bottom demoulding mechanism, a side demoulding mechanism and a driving mechanism, the bottom demolding mechanism is arranged at the bottom of the cavity and penetrates out of the lower mold to extend to the mounting space, the side demolding mechanism is arranged on the side wall of the cavity and penetrates out of the lower mold to extend to the mounting space, and the driving mechanism is arranged in the mounting space and makes contact with the ends, located in the mounting space, of the bottom demolding mechanism and the side demolding mechanism. The bottom demolding mechanism and the side demolding mechanism are driven to do reciprocating motion, and the lower mold is provided with channels in movable fit with the bottom demolding mechanism and the side demolding mechanism. The demoulding device is more balanced in demoulding force application, greatly reduces the probability of pulling damage and even deformation fracture of spare and accessory parts due to non-uniform stress, and enables the spare and accessory parts to be demoulded more quickly and conveniently.

Description

TECHNICAL FIELD

[0001] The utility model belongs to injection mold stripping technical field especially relates to a push type stripping mechanism for injection mold. BACKGROUND

[0002] At present, some injection products will design some silicone material spare parts due to assembly needs, these spare parts are usually irregular special shape, and the ejection direction of the injection products is not consistent, for the stripping of this kind of spare parts, the slider is usually used to cooperate with the inclined top structure to realize the pushing.

[0003] Therefore, developing a novel ejector rod stripping mechanism convenient for stripping is the key to solve the problem. UTILITY MODEL CONTENTS

[0004] The utility model provides a push type stripping mechanism for injection mold.

[0005] The utility model discloses a following technical scheme realizes: including lower mould, being equipped with cavity on lower mould, being provided with installation space on any side of cavity, setting up ejector rod stripping mechanism in installation space, and the ejector rod stripping mechanism extends into cavity, the ejector rod stripping mechanism includes bottom stripping mechanism, side stripping mechanism and drive mechanism, bottom stripping mechanism sets up at the bottom of cavity and extends to installation space by wearing out lower mould, side stripping mechanism sets up at the side wall of cavity and extends to installation space by wearing out lower mould, and drive mechanism sets up in installation space, and it respectively contacts bottom stripping mechanism, side stripping mechanism at one end in installation space, and drives bottom stripping mechanism, side stripping mechanism to do reciprocating motion, and the lower mould is respectively equipped with the passageway of dynamic cooperation with bottom stripping mechanism, side stripping mechanism.

[0006] Further, the bottom stripping mechanism includes a lower top plate, a lower ejector rod, a lower push rod and a spring, the lower top plate is arranged at the bottom of the cavity, a T-shaped lower passageway is arranged at the bottom of the cavity to communicate with the installation space, the lower ejector rod is arranged at the vertical section of the lower passageway in dynamic cooperation with the lower passageway, the upper end of the lower ejector rod extends to the cavity to contact or connect the lower top plate, the lower push rod is arranged at the horizontal section of the lower passageway in dynamic cooperation with the lower passageway, the spring is arranged at the inner end of the lower push rod, the lower push rod pushes the lower ejector rod up and down, and the outer end of the lower push rod extends to the installation space. The lower push rod is retreated by the spring, and the lower top plate is attached to the bottom of the cavity.

[0007] Further, the side demolding mechanism comprises a side top plate, a side top rod and a spring, an upper channel in the shape of a Chinese character is arranged in the side wall of the cavity to communicate with the installation space, the side top plate is arranged on one side of the upper channel in the cavity, the spring is arranged in the large-diameter hole section of the upper channel, the side top rod is arranged in the shape of a Chinese character matched with the shape of the upper channel, and the two are in dynamic cooperation, one end of the side top rod penetrates through the spring and the upper channel to connect the side top plate, so that the side top rod limits the spring in the large-diameter hole section of the upper channel, and the other end penetrates out of the upper channel to contact the driving mechanism; the side top plate is retracted into the containing groove by the spring pushing the side top rod, the integrity of the cavity is maintained, and interference with the molding of the spare part is avoided.

[0008] Further, the driving mechanism comprises a wedge block, a pushing rod and a driving piece, the driving piece is arranged at the bottom of the installation space, the pushing rod is vertically arranged at the top of the driving piece, the driving piece drives the pushing rod to lift, and the wedge block is arranged on the pushing rod and is in dynamic cooperation with the lower pushing rod and the side top rod.

[0009] Further, the lower pushing rod is provided with an arc-shaped pushing part protruding upward, the pushing part pushes the lower top rod to lift, and the lower end of the lower top rod is provided in a semispherical structure.

[0010] The utility model discloses the beneficial effect is: the utility model discloses compact structure, through wedge block promotes the adjustment block, side top plate removes and pushes, sets up lower top plate cooperation, and the spare part is pushed simultaneously, so that the spare part and the cavity side wall complete separation, through the pushing of two directions, increase the contact area with the spare part, and the demolding force is more balanced, effectively avoid the phenomenon that stick to the top plate, effectively guarantee demolding quality and efficiency, greatly reduce the probability that the spare part is unevenly stressed and is even deformed and broken, make the spare part demolding more quickly and conveniently. ACCURACY OF DRAWINGS

[0011] Figure 1 It is the structural schematic diagram of the utility model;

[0012] Figure 2 It is the position relation schematic diagram of lower mould and lower channel and upper channel;

[0013] Figure 3 It is the structural schematic diagram of bottom demolding mechanism;

[0014] Figure 4 It is the right -view structural schematic diagram of lower pushing rod and lower channel;

[0015] Figure 5 It is the structural schematic diagram of side demolding mechanism;

[0016] Figure 6 It is the structural schematic diagram of another implementation of the utility model driving piece;

[0017] The figure label: 1~lower mold, 2~cavity, 3~installation space, 4~lower top plate, 5~lower channel, 6~lower ejector rod, 7~lower push rod, 8~side top plate, 9~side ejector rod, 10~spring, 11~pushing part, 12~wedge block, 13~ejector rod, 14~drive part, 15~containing groove, 16~upper channel, 17~screw nut, 18~spare parts. DETAILED DESCRIPTION

[0018] In order for those skilled in the art to better understand the technical scheme of the present application, the specific embodiments thereof will be described in detail below with reference to the accompanying drawings.

[0019] As Figures 1-5 shown in the push type demolding mechanism for injection mold, including lower mold 1, on the lower mold 1 is provided with cavity 2, on either side of the cavity 2 is provided with installation space 3, in the installation space 3 is provided with ejector rod demolding mechanism, the ejector rod demolding mechanism extends into the cavity 2, the ejector rod demolding mechanism includes bottom demolding mechanism, side demolding mechanism and drive mechanism, the bottom demolding mechanism is arranged at the bottom of the cavity 2, and extends to the installation space 3 through the lower mold 1, the side demolding mechanism is arranged on the side wall of the cavity 2, and extends to the installation space 3 through the lower mold 1, the drive mechanism is arranged in the installation space 3, which respectively contacts the bottom demolding mechanism, the side demolding mechanism at one end of the installation space 3, drives the bottom demolding mechanism and the side demolding mechanism to do reciprocating motion, and the lower mold 1 is respectively provided with the channel which is dynamically matched with the bottom demolding mechanism and the side demolding mechanism.

[0020] The bottom demolding mechanism includes lower top plate 4, lower ejector rod 6, lower push rod 7 and spring 10, the lower top plate 4 is arranged at the bottom of the cavity 2, the T-shaped structure lower channel 5 is arranged at the bottom of the cavity 2 to communicate with the installation space 3, the lower ejector rod 6 is arranged at the vertical section of the lower channel 5 and dynamically matched with the lower channel 5, the upper end of the lower ejector rod 6 extends to the cavity 2 and contacts or connects the lower top plate 4, the lower push rod 7 is arranged at the horizontal section of the lower channel 5 and dynamically matched with the lower channel 5, the spring 10 is arranged at the inner end of the lower push rod 7, the lower push rod 7 pushes the lower ejector rod 6 to rise and fall, and the outer end of the lower push rod 7 extends to the installation space 3. After the spring 10 pushes the lower push rod 7 to retreat, the lower ejector rod 6 descends without support force, and the lower top plate 4 is attached to the bottom of the cavity 2.

[0021] The side demolding mechanism comprises a side top plate 8, a side top rod 9, and a spring 10, an upper channel 16 in the shape of a Chinese character "N" is arranged on the side wall of the cavity 2 to communicate with the installation space 3, the side top plate 8 is arranged on the cavity 2 side of the upper channel 16, the spring 10 is arranged in the large-diameter hole section of the upper channel 16, the side top rod 9 is arranged in the shape of a Chinese character "N" matching the shape of the upper channel 16, and the two are in dynamic cooperation, one end of the side top rod 9 penetrates through the spring 10 and the upper channel 16 to connect the side top plate 8, so that the side top rod 9 limits the spring 10 in the large-diameter hole section of the upper channel 16, and the other end penetrates out of the upper channel 16 to contact the driving mechanism; the side top plate 8 is retracted into the containing groove 15 by the spring 10 pushing the side top rod 9, the integrity of the cavity 2 is maintained, and interference with the molding of the spare part 18 is avoided.

[0022] The driving mechanism comprises a wedge block 12, a pushing rod 13, and a driving member 14, the driving member 14 is arranged at the bottom of the installation space 3, the top of the driving member 14 is vertically arranged with the pushing rod 13, the driving member 14 drives the pushing rod 13 to lift, and the wedge block 12 is arranged on the pushing rod 13 and is in dynamic cooperation with the downward pushing rod 7 and the side top rod 9.

[0023] The downward pushing rod 7 is arranged with an upward protruding arc-shaped pushing part 11, the pushing part 11 pushes the downward top rod 6 to lift, and the lower end of the downward top rod 6 is arranged in a hemispherical structure.

[0024] The wedge block 12 is arranged in a right trapezoidal structure, and the inclined surface of the wedge block 12 faces the downward pushing rod 7 and the side top rod 9, the end of the downward pushing rod 7 and the side top rod 9 is correspondingly arranged with an inclined surface or a hemispherical structure, and the inclined surface or the hemispherical structure is smoothly connected with the wedge block 12, so that the situation of being stuck is avoided.

[0025] The driving member 14 is a hydraulic cylinder or a pneumatic cylinder, and the piston rod of the driving member 14 is connected with the pushing rod 13 at the top.

[0026] The cross section of the downward pushing rod 7 is in a square structure, so that the downward pushing rod 7 does not turn over and lose the pushing function when moving due to the weight of the pushing part 11.

[0027] The side wall of the cavity 2 is arranged with the containing groove 15 matching the side top plate 8 corresponding to the upper channel 16.

[0028] As shown in the accompanying drawings Figure 6As shown, the driving member 14 is a motor, and the push rod 13 is a screw rod, the bottom of the screw rod is coaxially connected with the motor, the motor is a variable frequency motor, a screw nut 17 is arranged at the lower part of the screw rod, and each wedge block 12 is connected with the screw rod through the screw nut 17. During the rotation of the motor driven screw rod, the two screw nuts 17 on the screw rod will move upward, thereby driving each wedge block 12 to move upward, so that the wedge block 12 pushes the push rod 7 to move, the push rod 7 pushes the top rod 6 to move upward, the side rod 9 moves to push out the side plate 8, the part 18 is demolded, and after the demolding is completed, the motor drives the screw rod to rotate, so that the screw nut 17 drives each wedge block 12 to move downward and reset.

[0029] The working mode of the utility model is as follows: before the part 18 is injection molded, the lower plate 4 is adjusted to be tightly attached to the bottom of the cavity 2, the side plate 8 is in the accommodating groove 15, the driving member 14 drives the push rod 13 to be in the initial downward posture, so as to ensure the integrity of the cavity 2 and avoid interference with the molding of the part 18 during the injection molding process.

[0030] After the part 18 is injection molded, the driving member 14 is started to drive the push rod 13 and each wedge block 12 to move upward, the wedge block 12 at the lower part pushes the push rod 7 to move, the push rod 6 is lifted, the lower plate 4 and the part 18 thereon are lifted, the wedge block 12 at the upper part pushes the side rod 9 to move, the side plate 8 is pushed, and the part 18 is pushed, so that the part 18 is separated from the bottom and the side wall of the cavity 2, the part 18 is completely separated from the cavity 2 through the joint action of the lower plate 4 and the side plate 8, so that the part 18 is conveniently and completely taken out.

[0031] Finally, the driving member 14 drives the push rod 13 to move downward and reset, the wedge block 12 moves downward and gradually loses the pushing force on the push rod 7 and the side rod 9, the push rod 7 is reset under the pushing action of the spring 10 and no longer lifts the push rod 6, so that the lower plate 4 is at the bottom of the cavity 2, and the side plate 8 is automatically retreated into the accommodating groove 15 under the pushing action of the spring 10, so as to wait for the next injection molding operation of the part 18.

Claims

1. A push-type demolding mechanism for injection molds, comprising a lower mold (1), a cavity (2) provided on the lower mold (1), an installation space (3) provided on either side of the cavity (2), and an ejector rod demolding mechanism provided in the installation space (3), the ejector rod demolding mechanism extending into the cavity (2), characterized in that: The ejector rod demolding mechanism includes a bottom demolding mechanism, a side demolding mechanism and a driving mechanism. The bottom demolding mechanism is located at the bottom of the cavity (2) and extends through the lower mold (1) to the installation space (3). The side demolding mechanism is located on the side wall of the cavity (2) and extends through the lower mold (1) to the installation space (3). The driving mechanism is located in the installation space (3) and contacts the bottom demolding mechanism and the side demolding mechanism at one end of the installation space (3) respectively, driving the bottom demolding mechanism and the side demolding mechanism to reciprocate. The lower mold (1) is provided with channels that are dynamically coordinated with the bottom demolding mechanism and the side demolding mechanism.

2. The ejector-type demolding mechanism for injection molds according to claim 1, characterized in that: The bottom demolding mechanism includes a lower top plate (4), a lower ejector rod (6), a lower push rod (7), and a spring (10). The lower top plate (4) is located at the bottom of the cavity (2). A T-shaped lower channel (5) is provided at the bottom of the cavity (2) to connect to the installation space (3). The lower ejector rod (6) is provided in the vertical section of the lower channel (5) and is in kinetic cooperation with it. The upper end of the lower ejector rod (6) extends to the cavity (2) to contact or connect with the lower top plate (4). The lower push rod (7) is provided in the horizontal section of the lower channel (5) and is in kinetic cooperation with it. A spring (10) is provided at the inner end of the lower push rod (7). The lower push rod (7) pushes the lower ejector rod (6) to rise and fall. The outer end of the lower push rod (7) extends to the installation space (3).

3. The ejector-type demolding mechanism for injection molds according to claim 1, characterized in that: The side demolding mechanism includes a side top plate (8), a side push rod (9), and a spring (10). A U-shaped upper channel (16) is provided on the side wall of the cavity (2) to connect the installation space (3). A side top plate (8) is placed on one side of the cavity (2) of the upper channel (16). A spring (10) is provided in the large-diameter hole section of the upper channel (16). The side push rod (9) is provided with a U-shaped structure that matches the shape of the upper channel (16). The two are dynamically coordinated. One end of the side push rod (9) passes through the spring (10) and the upper channel (16) to connect to the side top plate (8), so that the side push rod (9) restricts the spring (10) in the large-diameter hole section of the upper channel (16). The other end passes out of the upper channel (16) to contact the drive mechanism.

4. The ejector-type demolding mechanism for injection molds according to claim 1, characterized in that: The driving mechanism includes a wedge (12), a push rod (13), and a driving component (14). The driving component (14) is located at the bottom of the installation space (3), and the push rod (13) is vertically arranged on its top. The push rod (13) is driven to rise and fall. The push rod (13) is provided with a wedge (12) that is in kinetic cooperation with the lower push rod (7) and the side push rod (9).

5. The ejector-type demolding mechanism for injection molds according to claim 2, characterized in that: The lower push rod (7) is provided with an upward protruding, arc-shaped push part (11), which pushes the lower push rod (6) to rise and fall. The lower end of the lower push rod (6) is provided with a hemispherical structure.

6. The ejector-type demolding mechanism for injection molds according to claim 4, characterized in that: The wedge (12) is configured in the shape of a right trapezoid, and the inclined side of the wedge (12) has a downward push rod (7) and a side push rod (9), and the ends of the downward push rod (7) and the side push rod (9) are respectively provided with inclined surfaces corresponding to the wedge (12).

7. The ejector-type demolding mechanism for injection molds according to claim 4, characterized in that: The driving component (14) is a hydraulic cylinder or a pneumatic cylinder, and the piston rod of the driving component (14) is connected to the push rod (13).

8. The ejector-type demolding mechanism for injection molds according to claim 2 or 5, characterized in that: The cross-section of the push rod (7) is square.

9. The ejector-type demolding mechanism for injection molds according to claim 1, characterized in that: The cavity (2) has a receiving groove (15) on its side wall corresponding to the upper channel (16) that is compatible with the side top plate (8).

10. The ejector-type demolding mechanism for injection molds according to claim 4, characterized in that: The driving component (14) is a motor, the push rod (13) is a lead screw, the bottom of the lead screw is coaxially connected to the motor, and a lead screw nut (17) is provided at the bottom of the lead screw. Each wedge (12) is connected to the lead screw through the lead screw nut (17).

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