A mold ejection mechanism with a protective device

Abstract

The invention discloses a mold ejection mechanism with a protective device, comprising a main mold shell, a main mold core, a nitrogen spring, a plum blossom punch, an ejector pin rear pad, a locking tooth cover, a main mold cavity rear pad, an ejector pin protective sleeve, an ejector pin and a main mold ejector pin sleeve, one end of the nitrogen spring is mounted on the main mold core, the other end of the nitrogen spring is mounted on the ejector pin rear pad, the locking tooth cover is mounted between the ejector pin rear pad and the main mold cavity rear pad, one end of the ejector pin is mounted on the main mold ejector pin sleeve, the ejector pin passes through the center of the main mold cavity rear pad, the locking tooth cover and the ejector pin rear pad to one end of the main mold core, the plum blossom punch is arranged in the middle of the nitrogen spring, the main mold shell is mounted on the main mold core, the nitrogen spring, the ejector pin rear pad and the outer side of the locking tooth cover, the ejector pin passes through the ejector pin protective sleeve, and the main mold cavity rear pad and the ejector pin protective sleeve are designed so that a single or multiple ejectors can always maintain the existing center position on the same axis, and the ejector pin will not be bent or broken due to excessive suspension during ejection.

Description

Technical Field

[0001] The invention relates to the technical field of molds, and in particular to a mold ejection mechanism with a protective device. Background Art

[0002] Under the existing mold length, the longer the processed product is, the longer the ejector rod is suspended behind the mold, and the greater the force during ejection. As a result, the ejector rod may bend and break, causing damage to the mold and failure of product ejection. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a mold ejection mechanism with a protective device to solve the bending and folding problems of a single or multiple combined ejector pins during ejection, making the ejector pins more solid, stable and not easy to break during ejection.

[0004] The embodiment of the present invention discloses a mold ejection mechanism with a protective device, comprising a main mold shell, a main mold core, a nitrogen spring, a plum blossom punch, an ejector pin rear pad, a locking tooth cover, a main mold cavity rear pad, an ejector pin protective sleeve, an ejector pin and a main mold ejector pin sleeve, one end of the nitrogen spring is installed on the main mold core, the other end of the nitrogen spring is installed on the ejector pin rear pad, the locking tooth cover is installed between the ejector pin rear pad and the main mold cavity rear pad, one end of the ejector pin is installed on the main mold ejector pin sleeve, the ejector pin passes through the center of the main mold cavity rear pad, the locking tooth cover and the ejector pin rear pad to one end of the main mold core, the plum blossom punch is arranged in the middle of the nitrogen spring, the main mold shell is installed on the outside of the main mold core, the nitrogen spring, the ejector pin rear pad and the locking tooth cover, a through hole is provided in the middle of the main mold cavity rear pad, the ejector pin protective sleeve is installed on the through hole, and the ejector pin passes through the ejector pin protective sleeve.

[0005] Furthermore, two ejector pin protection sleeves are provided, and the ejector pin protection sleeves include a fixing block and a fixing ear. The fixing block is a cylinder, and a protection hole matching the ejector pin is provided on the fixing block. The fixing ear is installed on the side of the fixing block.

[0006] Furthermore, the fixing ears are of a rectangular parallelepiped structure, and a connecting line of the two fixing ears overlaps with a diameter of the fixing block.

[0007] Furthermore, the ejector pin protective sleeve includes a horizontal ejector pin protective sleeve and a vertical ejector pin protective sleeve. The two fixing ears of the horizontal ejector pin protective sleeve are horizontally distributed, and the two fixing ears of the vertical ejector pin protective sleeve are vertically distributed. The vertical ejector pin protective sleeve is located on one side of the ejector pin sleeve of the main mold, and the cross-section of the through hole consists of a circle and four rectangles distributed on the outside of the circle.

[0008] Furthermore, three evenly distributed threaded holes passing through the axis are provided on the cylindrical surface of the horizontal ejector protection sleeve, and two adjacent circular holes are symmetrical with respect to the fixing ear; three evenly distributed threaded holes passing through the axis are provided on the cylindrical surface of the vertical ejector protection sleeve, and one of the threaded holes passes through the fixing ear of the vertical ejector protection sleeve.

[0009] Furthermore, two main mold positioning pins are provided in the rear pad of the main mold cavity, and the two main mold positioning pins are distributed vertically. The rear pad of the main mold cavity is provided with a through mounting hole passing through the axis, and the mounting hole is located at the top, and the two main mold positioning pins are installed in the mounting hole.

[0010] Furthermore, the main mold positioning pin is located between the horizontal ejector pin protection sleeve and the vertical ejector pin protection sleeve.

[0011] Furthermore, the ejector rear pad includes ejector rear pad one and ejector rear pad two, the ejector rear pad one is cylindrical, the nitrogen spring is installed on the end face of the ejector rear pad one, the ejector rear pad two is stepped, the ejector rear pad two includes a front cylinder and a rear cylinder, the front cylinder has the same diameter as the ejector rear pad one, the diameter of the rear cylinder is smaller than the diameter of the front cylinder, and the locking tooth cover is installed on the rear cylinder.

[0012] The invention designs the rear pad of the main mold cavity and the ejector pin protective sleeve so that a single or multiple ejector pins can always maintain the existing central position at a shorter position, and the ejector pin will not be bent or broken due to being suspended too long during ejection. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of an embodiment of the present invention.

[0014] Figure 2 This is a partial schematic diagram of removing the main mold shell according to an embodiment of the present invention.

[0015] Figure 3 This is a partial schematic diagram of removing the main mold shell and the rear pad of the main mold cavity according to an embodiment of the present invention.

[0016] Figure 4 It is a partial schematic diagram of an embodiment of the present invention.

[0017] Figure 5 It is a schematic diagram of a horizontal ejector pin protective sleeve according to an embodiment of the present invention.

[0018] Figure 6 It is a schematic diagram of a vertical ejector pin protective cover according to an embodiment of the present invention.

[0019] Figure 7 This is a schematic diagram of a second ejector rear pad according to an embodiment of the present invention.

[0020] Figure 8 Schematic diagram of the rear pad of the main mold cavity according to an embodiment of the present invention.

[0021] Fig. 9 This is a right side view of the rear pad of the main mold cavity according to an embodiment of the present invention. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] As shown in the figure, an embodiment of the present invention discloses a mold ejection mechanism with a protective device, including a main mold shell 1, a main mold core 2, a nitrogen spring 3, a plum blossom punch 4, an ejector pin rear pad 5, a locking tooth cover 6, a main mold cavity rear pad 7, an ejector pin protective sleeve 8, an ejector pin 9 and a main mold ejector pin sleeve 10, one end of the nitrogen spring 3 is installed on the main mold core 2, the other end of the nitrogen spring 3 is installed on the ejector pin rear pad 5, the locking tooth cover 6 is installed between the ejector pin rear pad 5 and the main mold cavity rear pad 7, one end of the ejector pin 9 is installed on the main mold ejector pin sleeve 10, the ejector pin 9 passes through the center of the main mold cavity rear pad 7, the locking tooth cover 6 and the ejector pin rear pad 5 to one end of the main mold core 2, the plum blossom punch 4 is arranged in the middle of the nitrogen spring 3, the main mold shell 1 is installed on the outside of the main mold core 2, the nitrogen spring 3, the ejector pin rear pad 5 and the locking tooth cover 6, a through hole 71 is provided in the middle of the main mold cavity rear pad 7, the ejector pin protective sleeve 8 is installed on the through hole, and the ejector pin 9 passes through the ejector pin protective sleeve 8.

[0024] Under the existing mold length, the longer the processed product is, the longer the ejector pin is suspended behind the mold, and the greater the force during ejection. As a result, the ejector pin will bend and break, causing product ejection failure.

[0025] The present invention changes the mold structure and adds an ejector pin protective cover. For example, if the ejector pin is suspended for 210 mm, the ejector pin protective cover is added at 70 mm / 140 mm, so that a single or multiple ejector pins in combination can always maintain the existing center position at a shorter position, and the ejector pin will not be bent or broken due to being suspended too long during ejection.

[0026] The length of the existing mold can only reach 1 / 2 of the mold length, while the invention can reach 75% of the mold length, and the ejection is smooth, which improves the efficiency by 50%.

[0027] In one embodiment of the present invention, two ejector pin protective sleeves 8 are provided, and the ejector pin protective sleeves 8 include a fixing block 801 and a fixing ear 802 . The fixing block 801 is a cylinder, and a protection hole 803 matching the ejector pin 9 is provided on the fixing block 801 . The fixing ear 802 is installed on the side of the fixing block 801 .

[0028] The fixing ear serves to fix the ejector pin protective sleeve.

[0029] In one embodiment of the present invention, the fixing ears 802 are rectangular parallelepiped structures, and the connecting line of the two fixing ears 802 overlaps with the diameter of the fixing block 801 .

[0030] In one embodiment of the present invention, the ejector pin protective sleeve 8 includes a horizontal ejector pin protective sleeve 81 and a vertical ejector pin protective sleeve 82. The two fixing ears of the horizontal ejector pin protective sleeve 81 are horizontally distributed, and the two fixing ears of the vertical ejector pin protective sleeve 82 are vertically distributed. The vertical ejector pin protective sleeve is located on one side of the main mold ejector pin sleeve 10. The cross-section of the through hole 71 consists of a circle 712 and four rectangles 711 distributed on the outside of the circle.

[0031] In one embodiment of the present invention, three evenly distributed circular holes 811 passing through the axis are provided on the cylindrical surface of the horizontal ejector protection sleeve 81, wherein two adjacent circular holes 811 are symmetrical with respect to the fixing ear; and three evenly distributed threaded holes 821 passing through the axis are provided on the cylindrical surface of the vertical ejector protection sleeve 82, wherein one threaded hole passes through the fixing ear of the vertical ejector protection sleeve.

[0032] The horizontal ejector pin protection cover and the vertical ejector pin protection cover are cross-installed to protect the ejector pins.

[0033] In one embodiment of the present invention, two main mold positioning pins 11 are provided in the main mold cavity rear pad 7, and the two main mold positioning pins 11 are vertically distributed. The main mold cavity rear pad 7 is provided with a through mounting hole 72 passing through the axis, and the mounting hole is located at the uppermost end, and the two main mold positioning pins 11 are installed in the mounting hole.

[0034] In one embodiment of the present invention, the main mold positioning pin 11 is located between the horizontal ejector pin protection sleeve 81 and the vertical ejector pin protection sleeve 82 .

[0035] In one embodiment of the present invention, the ejector rear pad 5 includes an ejector rear pad 1 51 and an ejector rear pad 2 52. The ejector rear pad 1 51 is cylindrical. The nitrogen spring 3 is installed on the end surface of the ejector rear pad 1 51. The ejector rear pad 2 52 is stepped. The ejector rear pad 2 52 includes a front cylinder 521 and a rear cylinder 522. The front cylinder 521 has the same diameter as the ejector rear pad 1 51, and the diameter of the rear cylinder 522 is smaller than the diameter of the front cylinder 511. The locking tooth cover 6 is installed on the rear cylinder 522.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A mold ejection mechanism with a protective device, characterized in that: It includes a main mold shell, a main mold core, a nitrogen spring, a plum blossom punch, an ejector back pad, a locking tooth cover, a main mold cavity back pad, an ejector protective sleeve, an ejector and a main mold ejector sleeve, one end of the nitrogen spring is installed on the main mold core, the other end of the nitrogen spring is installed on the ejector back pad, the locking tooth cover is installed between the ejector back pad and the main mold cavity back pad, one end of the ejector is installed on the main mold ejector sleeve, the ejector passes through the center of the main mold cavity back pad, the locking tooth cover and the ejector back pad to one end of the main mold core, the plum blossom punch is arranged in the middle of the nitrogen spring, the main mold shell is installed on the outside of the main mold core, the nitrogen spring, the ejector back pad and the locking tooth cover, a through hole is arranged in the middle of the main mold cavity back pad, the ejector protective sleeve is installed on the through hole, and the ejector passes through the ejector protective sleeve; There are two ejector pin protection sleeves, which include a fixing block and a fixing ear. The fixing block is a cylinder, and a protection hole matching the ejector pin is provided on the fixing block. The fixing ear is installed on the side of the fixing block. The fixing ears are rectangular parallelepiped structures, and the connecting line of the two fixing ears overlaps with the diameter of the fixing block; The ejector pin protective sleeve includes a horizontal ejector pin protective sleeve and a vertical ejector pin protective sleeve. The two fixing ears of the horizontal ejector pin protective sleeve are horizontally distributed, and the two fixing ears of the vertical ejector pin protective sleeve are vertically distributed. The vertical ejector pin protective sleeve is located on one side of the ejector pin sleeve of the main mold. The cross section of the through hole consists of a circle and four rectangles distributed outside the circle. The ejector rear pad includes ejector rear pad one and ejector rear pad two. The ejector rear pad one is cylindrical, and the nitrogen spring is installed on the end face of the ejector rear pad one. The ejector rear pad two is stepped, and the ejector rear pad two includes a front cylinder and a rear cylinder. The front cylinder has the same diameter as the ejector rear pad one, and the diameter of the rear cylinder is smaller than the diameter of the front cylinder. The locking tooth cover is installed on the rear cylinder.

2. A mold ejection mechanism with a protective device as claimed in claim 1, characterized in that: The cylindrical surface of the horizontal ejector protection sleeve is provided with three evenly distributed threaded holes passing through the axis, wherein two adjacent threaded holes are symmetrical with respect to the fixing ear; the cylindrical surface of the vertical ejector protection sleeve is provided with three evenly distributed threaded holes passing through the axis, wherein one threaded hole passes through the fixing ear of the vertical ejector protection sleeve.

3. A mold ejection mechanism with a protective device as claimed in claim 1, characterized in that: Two main mold positioning pins are arranged in the rear pad of the main mold cavity, and the two main mold positioning pins are distributed vertically. A through mounting hole passing through the axis is arranged in the rear pad of the main mold cavity, and the mounting hole is located at the uppermost end, and the two main mold positioning pins are installed in the mounting hole.

4. A mold ejection mechanism with a protective device as claimed in claim 3, characterized in that: The main mold positioning pin is located between the horizontal ejector pin protection sleeve and the vertical ejector pin protection sleeve.

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