Mould limiting ejection structure

Abstract

The utility model discloses a mould limit ejection structure, which belongs to the technical field of mould processing and comprises an upper mould and a lower mould, the upper mould is inversely buckled on the lower mould to form a mould cavity, a mounting cavity is arranged in the lower mould, a plurality of secondary ejector rod mechanisms and a core retreating mechanism are mounted in the mounting cavity, and the secondary ejector rod mechanisms and the core retreating mechanism are arranged in the mounting cavity. The secondary ejector rod mechanism and the mold core retreating mechanism are rotationally connected with the sliding block mechanism; the sliding block mechanism is fixedly connected with the output end of the driving mechanism; the secondary ejection mechanism and the mold core retreating mechanism can be driven to move up and down by controlling the movement range of the sliding block mechanism, so that opposite movement of the mold core and the ejector rod is realized, demolding separation can be performed through retreating of the mold core, and a finished product can be ejected twice.

Description

Technical Field

[0001] The utility model belongs to the technical field of mold processing, and in particular relates to a mold limiting ejection structure. Background Art

[0002] The statements in this section merely provide background technical information related to the present invention and do not necessarily constitute prior art.

[0003] At present, the mold usually forms a cavity by combining a moving module and a fixed module, and various high-temperature liquid materials are filled into the cavity from the injection port to produce finished products with specific shapes, sizes, functions and quality. The finished products are usually ejected once by the ejector pin in the mold to complete demolding.

[0004] When using a special-shaped core for integral molding of a finished product, the prior art uses a method of ejecting the finished product at one time with an ejector pin. Since the ejection area of ​​the ejector pin is limited, multiple ejectors need to be provided to form an ejection. However, since demolding and separation cannot be performed by withdrawing the core, there is a tight hold during separation, which leads to local demolding difficulties and prone to cracking. In addition, when the shape of the finished product is relatively special, the method of ejecting the finished product at one time with an ejector pin cannot perfectly remove the finished product, which requires an additional ejection action. Utility Model Content

[0005] In view of the above problems, the utility model provides a mold limiting ejection structure, which can drive the secondary ejection mechanism and the core withdrawal mechanism to move up and down by controlling the movement range of the limiting slider mechanism, thereby realizing the opposite movement of the core and the ejector rod, which can not only demould and separate by withdrawing the core, but also eject the finished product twice.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A mold limiting ejection structure comprises an upper mold and a lower mold, wherein the upper mold is inverted on the lower mold to form a model cavity, and an installation cavity is arranged inside the lower mold, wherein a plurality of secondary ejector mechanisms and a core withdrawal mechanism are installed in the installation cavity, wherein the secondary ejector mechanism and the core withdrawal mechanism are rotationally connected to a slider mechanism, and the slider mechanism is fixedly connected to the output end of a driving mechanism; a first through hole and a core through hole which are connected to the model cavity are arranged on the top of the installation cavity, and are used for the secondary ejector mechanism and the core withdrawal mechanism to make reciprocating motion in the model cavity and the installation cavity respectively.

[0008] Preferably, the slider mechanism includes a trapezoidal slider body, a plurality of pulleys are arranged on the horizontal bottom surface of the trapezoidal slider body, and the movement range of the trapezoidal slider body is limited by a first limiting baffle and a second limiting baffle; the first limiting baffle and the second limiting baffle are both fixedly connected to the bottom surface of the mounting cavity, and the top surface of the trapezoidal slider body is an inclined edge.

[0009] Preferably, the core through hole is located at the center position of the top of the installation cavity, and several first through holes are grouped in pairs and symmetrically arranged relative to the core through hole; the first through hole is a "1"-shaped through hole, and the core through hole is a "middle"-shaped through hole; a driving through hole is also opened on the side of the installation cavity, and the output end of the driving mechanism is fixedly connected to the vertical long side of the trapezoidal slider body through the driving through hole, and the driving mechanism is arranged on the outside of the lower mold.

[0010] Preferably, the secondary push rod mechanism includes a concave block and a push block, a first groove is opened in the middle of the concave block for accommodating the push block, a through cavity is opened in the center of the push block, two push rods are fixedly connected to the push block, the push rods are symmetrically arranged relative to the center of the push block, and the two push rods are respectively inserted into the corresponding first through holes.

[0011] Preferably, a second groove is further provided at the lower portion of the first groove, and a rotating rod is symmetrically arranged in the second groove, the rotating rod is rotatably connected to the concave block, the vertical short end of the rotating rod presses against the bottom of the top block, and the vertical long end of the rotating rod extends out of the second groove and extends into the through cavity and is on the same horizontal line as the top surface of the top block; a T-shaped pressure rod is fixedly arranged on the top of the installation cavity, and the horizontal end of the T-shaped pressure rod faces the through cavity and can just extend into the through cavity.

[0012] Preferably, the bottom of the concave block is fixedly connected to the first connecting rod, the first connecting rod is hinged to the second connecting rod, and the second connecting rod is connected to the top surface of the trapezoidal slider body; the length of the first connecting rod of each concave block remains unchanged, the length of the second connecting rod close to the vertical short side of the trapezoidal slider body is long, and the length of the second connecting rod close to the vertical long side of the trapezoidal slider body is short.

[0013] Preferably, the core retraction mechanism includes a "earth"-shaped rod, the long horizontal end of the "earth"-shaped rod is located in the installation cavity, and the short horizontal end of the "earth"-shaped rod can be just accommodated in the core through hole; the top of the vertical section of the "earth"-shaped rod is fixedly connected to the core, the bottom center of the long horizontal end of the "earth"-shaped rod is connected to the third connecting rod, the third connecting rod is hinged to the fourth connecting rod, and the fourth connecting rod is hinged to the top surface of the trapezoidal slider body.

[0014] Preferably, the driving mechanism drives the linear motion of the slider mechanism, so that the second connecting rod rotates relative to the first connecting rod, which is converted into the linear motion of the first connecting rod driving the push rod upward or downward; and the fourth connecting rod rotates relative to the third connecting rod, which is finally converted into the linear motion of the third connecting rod driving the core upward or downward.

[0015] Preferably, when the vertical long side of the trapezoidal slider body contacts the second limiting baffle, the core is located as a whole in the model cavity, the top of the vertical section of the "earth"-shaped rod and the top of the top rod are both on the same horizontal plane with the bottom surface of the model cavity, and at this time, the third connecting rod is perpendicular to the fourth connecting rod, and the angle between the first connecting rod and the fourth connecting rod is an obtuse angle.

[0016] Preferably, when the vertical short side of the trapezoidal slider body contacts the first limiting baffle, a small part of the core is in the model cavity, and most of it is in the core through hole; the T-shaped pressure rod presses the vertical long end of the rotating rod, and the top block is lifted by the vertical short end of the rotating rod to drive the top rod upward. At this time, the angle between the third connecting rod and the fourth connecting rod is an obtuse angle, and the first connecting rod is perpendicular to the fourth connecting rod.

[0017] Preferably, a feed port is provided at the top of the upper mold, a guide groove is provided on the upper mold, and a guide column matching the guide groove is provided on the lower mold.

[0018] Compared with the prior art, the utility model has the following advantages and positive effects:

[0019] The utility model is provided with a secondary ejector mechanism and a core withdrawal mechanism which are rotatably connected with a slider mechanism, and the slider mechanism is fixedly connected with the output end of the driving mechanism. When the secondary ejection mechanism ejects the finished product, the core withdrawal mechanism can drive the core to withdraw, and the finished product and the core can be separated by reverse movement of the core and the ejector rod, and the runner and the slag bag can be separated from the finished product by secondary ejection of the secondary ejection mechanism. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0021] Figure 1 This is a schematic diagram of the overall structure of the embodiment of the utility model when no operation is performed;

[0022] Figure 2 This is a schematic diagram of the overall structure of the embodiment of the utility model in operation;

[0023] Figure 3 This is a schematic diagram of the overall structure of the embodiment of the utility model for completing the operation;

[0024] Figure 4 It is an embodiment of the utility model Figure 3 Schematic diagram at A in the middle;

[0025] Figure 5 It is an embodiment of the utility model Figure 3 Schematic diagram at B in the middle;

[0026] Figure 6 is a top view of a concave block of an embodiment of the utility model;

[0027] In the figure:

[0028] 1-upper mold, 2-lower mold, 3-secondary ejector mechanism, 4-core withdrawal mechanism, 5-slider mechanism, 6-driving mechanism, 7-mold cavity, 11-feeding port, 12-guide groove, 21-installation cavity, 211-first through hole, 212-core through hole, 213-driving through hole, 22-guide column, 31-concave block, 311-first groove, 312-second groove, 313-rotating rod, 32-elevator block, 321-through cavity, 33-elevator, 34-first connecting rod, 35-second connecting rod, 36-T-shaped pressure rod, 41-"earth" shaped rod, 42-core, 43-third connecting rod, 44-fourth connecting rod, 51-trapezoidal slider body, 52-pulley, 531-first limiting baffle, 532-second limiting baffle. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are all exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] The utility model is described in detail below in conjunction with the accompanying drawings. The present embodiment discloses a mold limiting ejection structure, such as Figure 1-3 As shown, it includes an upper mold 1 and a lower mold 2. The upper mold 1 is inverted on the lower mold 2 to form a mold cavity 7. The lower mold 2 is provided with an installation cavity 21 inside. The installation cavity 21 is installed with a secondary ejector mechanism 3 and a core withdrawal mechanism 4. The secondary ejector mechanism 3 and the core withdrawal mechanism 4 are rotatably connected to the slider mechanism 5. The slider mechanism 5 is fixedly connected to the output end of the driving mechanism 6. Figure 1 and Figure 4 , Figure 5 As shown, the top of the installation cavity 21 is provided with a plurality of first through holes 211 connected to the model cavity 7 and a core through hole 212 for the secondary ejector mechanism 3 and the core retracting mechanism 4 to reciprocate in the model cavity 7 and the installation cavity 21 .

[0031] In this embodiment, if Figure 1-3 As shown, the slider mechanism 5 includes a trapezoidal slider body 51, a plurality of pulleys 52 are arranged on the horizontal bottom surface of the trapezoidal slider body 51, the vertical long side of the trapezoidal slider body 51 is fixedly connected to the output end of the driving mechanism 6, and the movement range of the trapezoidal slider body 51 is limited by the first limiting baffle 531 and the second limiting baffle 532, as shown in FIG. Figure 1-3 As shown, the first limiting baffle 531 is arranged on the side where the vertical short side of the trapezoidal slider body 51 is located, and the second limiting baffle 532 is arranged on the side where the vertical long side of the trapezoidal slider body 51 is located, and the first limiting baffle 531 and the second limiting baffle 532 are both fixedly connected to the bottom surface of the installation cavity 21. In this embodiment, the top surface of the trapezoidal slider body 51 is an inclined edge.

[0032] In this embodiment, if Figure 1 , Figure 4 , Figure 5 As shown, the core through hole 212 is located at the center of the top of the installation cavity 21, and a plurality of first through holes 211 are symmetrically arranged relative to the core through hole 212. In this embodiment, four first through holes 211 are arranged, and each two first through holes 211 form a group, and each two first through holes 211 are symmetrically arranged relative to the core through hole 212. Figure 4 , Figure 5 As shown, the core through hole 212 is different from the first through hole 211. The first through hole 211 forms a through hole in the shape of "1" between the mold cavity 7 and the installation cavity 21, while the core through hole 212 is a through hole in the shape of "Z". A driving through hole 213 is also provided on the side of the installation cavity 21. The output end of the driving mechanism 6 is fixedly connected to one end of the slider mechanism 5 through the driving through hole 213. The driving mechanism 6 is arranged outside the lower mold 2.

[0033] In this embodiment, if Figure 4 As shown, the secondary ejector mechanism 3 includes a concave block 31 and a ejector block 32. A first groove 311 is opened in the middle of the concave block 31, and the first groove 311 can accommodate the ejector block 32. A through cavity 321 is opened in the center of the ejector block 32. Two ejector rods 33 are fixedly connected to the ejector block 32. The ejector rods 33 are symmetrically arranged relative to the center of the ejector block 32. The two ejector rods 33 are respectively inserted into the corresponding first through holes 211.

[0034] In this embodiment, if Figure 4 , Figure 6 As shown, a second groove 312 is also provided at the lower part of the first groove 311, and four rotating rods 313 are symmetrically arranged in the second groove 312, and each two rotating rods form a group. The rotating rods are rotatably connected to the concave block 31, and the vertical short ends of the rotating rods support the bottom of the top block 32, and the vertical long ends of the rotating rods extend out of the second groove 312, extend into the through cavity 321, and are on the same horizontal line with the top surface of the top block 32. On one side of the core through hole 212, between adjacent first through holes 211, a T-shaped pressure rod 36 is also fixedly arranged on the side of the top of the installation cavity 21 facing the concave block 31, and the vertical end of the T-shaped pressure rod 36 is fixedly connected to the installation cavity 21, and the horizontal end of the T-shaped pressure rod 36 can just extend into the through cavity 321.

[0035] In this embodiment, the bottom of the concave block 31 is fixedly connected with a first connecting rod 34, the first connecting rod 34 is hinged with a second connecting rod 35, and the second connecting rod 35 is connected to the top surface of the trapezoidal slider body 51. Figure 1-3As shown, since the top surface of the trapezoidal slider body 51 is an inclined structure, in order to make the secondary push rod mechanism 3 in the same horizontal position, it is required that the total length of the bottom connecting rod of each concave block 31 is different. In this embodiment, the length of the first connecting rod 34 is set to remain unchanged, the length of the second connecting rod close to the vertical short side of the trapezoidal slider body 51 is long, and the length of the second connecting rod close to the vertical long side of the trapezoidal slider body 51 is short.

[0036] In this embodiment, if Figure 2 As shown, when ejecting and demoulding, the concave block 31 drives the ejector rod 33 upward to eject the finished product in the first step until the T-shaped pressure rod 36 contacts the vertical long end of the rotating rod; Figure 3 As shown, the T-shaped pressure rod 36 presses the vertical long end of the rotating rod, and the ejector block 32 is lifted up by the vertical short end of the rotating rod to drive the ejector rod 33 to continue upward, and the finished product is ejected in the second step.

[0037] In this embodiment, if Figure 5 As shown, the core retraction mechanism 4 includes a "earth"-shaped rod 41, the long horizontal end of the "earth"-shaped rod 41 is located in the mounting cavity 21, and the short horizontal end of the "earth"-shaped rod 41 can be just accommodated in the core through hole 212. The "middle"-shaped setting of the core through hole 212 enables the short horizontal end of the "earth"-shaped rod 41 to only move up and down inside it.

[0038] In this embodiment, the top of the vertical section of the "earth"-shaped rod 41 is fixedly connected to the core 42, the bottom center of the long horizontal end of the "earth"-shaped rod 41 is connected to the third connecting rod 43, the third connecting rod 43 is hinged to the fourth connecting rod 44, and the fourth connecting rod 44 is hinged to the top surface of the trapezoidal slider body 51.

[0039] In this embodiment, the linear motion of the slider mechanism 5 driven by the driving mechanism 6 can be converted into the second connecting rod 35, so that the second connecting rod 35 makes a rotational motion compared with the first connecting rod 34, and is converted into the linear motion of the first connecting rod 34 driving the push rod 33 upward or downward; similarly, the linear motion of the slider mechanism 5 driven by the driving mechanism 6 can also be converted into the rotational motion of the fourth connecting rod 44, and finally converted into the linear motion of the core 42 driven by the third connecting rod 43 upward or downward.

[0040] In this embodiment, if Figure 1 As shown, when the vertical long side of the trapezoidal slider body 51 contacts the second limiting baffle 532, the core 42 is entirely in the model cavity 7, the top of the vertical section of the "earth"-shaped rod 41 is in the same horizontal plane as the bottom surface of the model cavity 7, and the top of the push rod 33 is also in the same horizontal plane as the bottom surface of the model cavity 7. At this time, the third connecting rod is perpendicular to the fourth connecting rod, and the angle between the first connecting rod and the fourth connecting rod is an obtuse angle.

[0041] like Figure 2As shown, when the trapezoidal slider body 51 is located between the first limiting baffle 531 and the second limiting baffle 532, half of the core 42 is in the mold cavity 7, and the other half is in the core through hole 212; the concave block 31 drives the ejector rod 33 upward to perform the first step of ejecting the finished product, and the T-shaped pressure rod 36 is in contact with the vertical long end of the rotary rod.

[0042] like Figure 3 As shown, when the vertical short side of the trapezoidal slider body 51 contacts the first limiting baffle 531, the core 42 is in the core through hole 212; the T-shaped pressure rod 36 presses the vertical long end of the rotary rod, so that the ejector block 32 is lifted by the vertical short end of the rotary rod and drives the ejector rod 33 to continue upward, and the finished product is ejected in the second step. At this time, the angle between the third connecting rod and the fourth connecting rod is an obtuse angle, and the first connecting rod is perpendicular to the fourth connecting rod.

[0043] This arrangement enables the core retracting mechanism 4 to drive the core 42 to retract while the secondary ejection mechanism 3 ejects the finished product. The finished product and the core are separated by the reverse movement of the core 42 and the ejector rod 33. The runner and the slag bag can be separated from the finished product by the secondary ejection. The slider mechanism can also limit the secondary ejection mechanism and the core retracting mechanism under the restriction of the limiting baffle.

[0044] In this embodiment, the top-down shape of the concave block 31 in the vertical direction is "two concentric circles", the top-down shape of the top block 32 in the vertical direction is circular, the top-down shape of the first groove 311 in the vertical direction is circular, the top-down shape of the through cavity 321 in the vertical direction is circular, the top-down shape of the top rod 33 in the vertical direction is circular, the top-down shape of the first through hole 211 in the vertical direction is circular, the top-down shape of the second groove 312 in the vertical direction is circular, the top-down shape of the T-shaped pressure rod 36 in the vertical direction is "two concentric circles", the top-down shape of the "earth"-shaped rod 41 in the vertical direction is "three concentric circles", the top-down shape of the core through hole 212 in the vertical direction is "two concentric circles", and the top-down shape of the core 42 in the vertical direction is "two concentric circles".

[0045] In this embodiment, a feed port 11 is provided at the top of the upper mold 1, a guide groove 12 is provided on the upper mold 1, and a guide column 22 matching the guide groove 12 is provided on the lower mold 2. The guide column and the guide groove play a guiding role to facilitate the closing of the upper mold 1 and the lower mold 2.

[0046] Although the above describes the specific implementation methods of the utility model in combination with the accompanying drawings, it is not intended to limit the scope of protection of the utility model. Technical personnel in the relevant field should understand that on the basis of the technical solution of the utility model, various modifications or deformations that can be made by technical personnel in this field without creative work are still within the scope of protection of the utility model.

Claims

1. A mold limiting ejection structure, characterized in that: It comprises an upper mould and a lower mould, wherein the upper mould is inverted on the lower mould to form a mould cavity, and an installation cavity is arranged inside the lower mould, and a plurality of secondary ejector mechanisms and a core withdrawal mechanism are installed in the installation cavity, wherein the secondary ejector mechanism and the core withdrawal mechanism are rotatably connected with a slider mechanism, and the slider mechanism is fixedly connected with the output end of the driving mechanism; a first through hole and a core through hole which are connected with the mould cavity are arranged on the top of the installation cavity, and the first through hole and the core through hole are respectively used for the secondary ejector mechanism and the core withdrawal mechanism to make reciprocating motion between the mould cavity and the installation cavity.

2. A mold limiting ejection structure according to claim 1, characterized in that: The core through hole is located at the center position of the top of the installation cavity, and a plurality of the first through holes form a group of two, and the first through holes in the same group are symmetrically arranged relative to the core through hole; the first through hole is a "1"-shaped through hole, and the core through hole is a "Z"-shaped through hole; a driving through hole is also provided on the side of the installation cavity, and the output end of the driving mechanism is fixedly connected to the slider mechanism through the driving through hole, and the driving mechanism is arranged outside the lower mold.

3. A mold limiting ejection structure as claimed in claim 2, characterized in that: The core retraction mechanism includes a "earth"-shaped rod, the long horizontal end of the "earth"-shaped rod is located in the installation cavity, and the short horizontal end of the "earth"-shaped rod is just accommodated in the core through hole of the "middle"-shaped through hole; the top of the vertical section of the "earth"-shaped rod is fixedly connected to the core, the bottom center of the long horizontal end of the "earth"-shaped rod is connected to the third connecting rod, the third connecting rod is hinged to the fourth connecting rod, and the fourth connecting rod is hinged to the top surface of the slider mechanism.

4. A mold limiting ejection structure according to claim 1, characterized in that: The secondary ejector mechanism includes a concave block and an ejector block. A first groove is opened in the middle of the concave block to accommodate the ejector block. A through cavity is opened in the center of the ejector block. Two ejector rods are fixedly connected to the ejector block. The ejector rods are symmetrically arranged relative to the center of the ejector block. The two ejector rods are respectively inserted into the corresponding first through holes.

5. A mold limiting ejection structure as claimed in claim 4, characterized in that: A second groove is also provided at the lower part of the first groove, and a rotating rod is symmetrically arranged in the second groove. The rotating rod is rotatably connected to the concave block, and the vertical short end of the rotating rod supports the bottom of the top block, and the vertical long end of the rotating rod extends out of the second groove and extends into the through cavity and is on the same horizontal line with the top surface of the top block; a T-shaped pressure rod is fixedly arranged on the top of the installation cavity, and the horizontal end of the T-shaped pressure rod is facing the through cavity and can just extend into the through cavity.

6. A mold limiting ejection structure as claimed in claim 4, characterized in that: The bottom of the concave block is fixedly connected to a first connecting rod, the first connecting rod is hinged to a second connecting rod, and the second connecting rod is connected to the slider mechanism; the length of the first connecting rod of each concave block remains unchanged, while the length of the second connecting rod is different.

7. A mold limiting ejection structure as claimed in claim 6, characterized in that: The slider mechanism includes a trapezoidal slider body, a plurality of pulleys are arranged on the horizontal bottom surface of the trapezoidal slider body, and the movement range of the trapezoidal slider body is limited by a first limiting baffle and a second limiting baffle fixedly connected to the bottom surface of the mounting cavity; the top surface of the trapezoidal slider body is an inclined edge; the output end of the driving mechanism is fixedly connected to the vertical long side of the trapezoidal slider body; the fourth connecting rod is hinged to the top surface of the trapezoidal slider body; the second connecting rod is hinged to the top surface of the trapezoidal slider body, wherein the second connecting rod close to the vertical short side of the trapezoidal slider body is long, and the second connecting rod close to the vertical long side of the trapezoidal slider body is short.

8. A mold limiting ejection structure as claimed in claim 7, characterized in that: The driving mechanism drives the linear motion of the slider mechanism, causing the fourth connecting rod to rotate relative to the third connecting rod, which is finally converted into the linear motion of the third connecting rod driving the core upward or downward; the driving mechanism drives the linear motion of the slider mechanism, causing the second connecting rod to rotate relative to the first connecting rod, which is converted into the linear motion of the first connecting rod driving the ejector rod upward or downward.

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