Injection mold release mechanism

Abstract

The injection mold disengaging mechanism provided by the present invention comprises a slider plate, an ejector plate arranged parallel to the slider plate and spaced apart, a driving member connected to the slider plate, and a delay rod, a pressure plate arranged on a fixed mold movably up and down, and an elastic member used to drive the pressure plate to move downward, the delay rod extends in the left and right directions, and comprises a first and a second delay rod respectively connected to the slider plate and the ejector plate and arranged side by side, the first delay rod is provided with an inclined step surface, the second delay rod is provided with a vertical step surface, the left edge of the bottom of the pressure plate abuts against the inclined step surface and the vertical step surface, when the driving member drives the slider plate to slide to the right, it can drive the slider to disengage first, and drive the first delay rod to move to the right, and lift the pressure plate upward through the inclined step surface, so that the pressure plate is disengaged from the vertical step surface, so that the slider plate can push the ejector plate to the right, and then drive the slider ejector to disengage, the mechanism occupies a small space, has a compact structure, is easy to control, is simple to operate, and is not easy to damage.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, and in particular to an injection mold disengagement mechanism. Background Art

[0002] Injection molds are tools used to produce injection molded parts. They are also tools that give injection molded parts complete structure and precise dimensions. The heated and melted plastic is injected into the mold cavity of the injection mold by an injection molding machine. After cooling and solidification, injection molded parts can be obtained.

[0003] With the continuous improvement of strength, integrity and lightweight requirements, the structure of existing injection molded parts is becoming more and more complex, with more and more staggered reinforcing ribs, and the rib space between adjacent reinforcing ribs is becoming more and more dense. Figure 1 As shown, the method of performing injection molding by only filling the rib space with a slider will make it difficult to demold the slider and easily tear the reinforcing ribs. To solve this problem, people have provided a slider pin on the slider to press against the bottom wall of the rib space. The slider and the slider pin are disengaged front and back to avoid deformation of the reinforcing ribs as the slider is disengaged. However, most injection molds using this method are provided with two sets of driving parts that respectively drive the slider and the slider pin to disengage, which occupies a large space and has a bloated structure. When in use, it is also necessary to accurately control the start time of the two sets of driving parts, which is difficult to control and complicated to operate. The slider and the slider pin are easily damaged due to misalignment in operation. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide an injection mold disengagement mechanism, which can realize the front and rear disengagement of a slider and a slider ejector pin, occupies a small space, has a compact structure, is easy to control, is simple to operate, and is not easy to damage.

[0005] To achieve the above object, the technical solution provided by the present invention is that the injection mold disengagement mechanism comprises:

[0006] A slider plate, to which a slider is connected;

[0007] An ejector plate is arranged parallel to and spaced from the slider plate, and the ejector pins of the slider are connected to the ejector plate;

[0008] A driving member connected to the slider plate;

[0009] a delay rod extending in the left-right direction;

[0010] A pressing plate movably arranged on the fixed mold up and down;

[0011] Elastic parts;

[0012] The delay rod includes a first delay rod and a second delay rod arranged side by side, the left end portion of the first delay rod is connected to the slider plate, the left end portion of the second delay rod is connected to the ejector plate, the upper surface of the first delay rod is provided with an inclined step surface extending downward and rightward, and the upper surface of the second delay rod is provided with a vertical step surface extending vertically downward, the elastic member is used to drive the pressure plate to move downward so that the left edge of the bottom of the pressure plate abuts against the inclined step surface and the vertical step surface, when the driving member drives the slider plate to slide to the right, the slider plate drives the slider to disengage, and drives the first delay rod to move to the right, and gradually lifts the pressure plate upward through the inclined step surface, so that the pressure plate is disengaged from the vertical step surface, so that the slider plate can push the ejector plate to the right, thereby realizing the delayed disengagement of the slider ejector.

[0013] Preferably, the highest point of the inclined step surface is flush with the highest point of the vertical step surface, and the lowest point of the inclined step surface is flush with the lowest point of the vertical step surface.

[0014] Preferably, a groove for accommodating the first delay rod is formed in the middle of the second delay rod.

[0015] Preferably, the left ends of the first delay rod and the second delay rod are both provided with T-shaped heads so as to be fixedly connected with the slider plate and the ejector plate.

[0016] Preferably, the fixed mold is connected to a support platform, and the pressing plate is embedded in a mounting groove on the support platform so as to be movable up and down.

[0017] Further preferably, screws are provided on both sides of the pressing plate, and the lower ends of the screws are threadedly connected to the support platform.

[0018] Further preferably, the elastic member is a compression spring inserted through the screw rod, and two ends of the compression spring are respectively pressed against the head of the screw rod and the upper surface of the pressure plate.

[0019] Preferably, when the driving member is not in motion, the upper surface of the pressing plate is flush with the upper surface of the supporting platform.

[0020] Preferably, the angle between the inclined step surface and the upper surface of the first delay rod is less than or equal to 40°.

[0021] Preferably, the injection mold disengaging mechanism further comprises a proximity switch for detecting the position of the right end portion of the second delay rod.

[0022] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0023] The injection mold disengaging mechanism provided by the present invention comprises a slider plate, an ejector plate arranged parallel to the slider plate and spaced apart, a driving member connected to the slider plate, a delay rod, a pressure plate arranged on a fixed mold movably up and down, and an elastic member used to drive the pressure plate to move downward, the delay rod extends in the left and right directions, and comprises a first and a second delay rod respectively connected to the slider plate and the ejector plate and arranged side by side, the first delay rod is provided with an inclined step surface, the second delay rod is provided with a vertical step surface, the left edge of the bottom of the pressure plate abuts against the inclined step surface and the vertical step surface, when the driving member drives the slider plate to slide to the right, it can drive the slider to disengage first, and drive the first delay rod to move to the right, and gradually lift the pressure plate upward through the inclined step surface, and finally make the pressure plate disengage from the vertical step surface, so that the slider plate can push the ejector plate to the right, and then drive the slider ejector to disengage, the mechanism occupies a small space, has a compact structure, is easy to control, is simple to operate, and is not easy to damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a three-dimensional schematic diagram of common injection molded parts.

[0025] Figure 2 It is a three-dimensional schematic diagram of a preferred embodiment of the present invention, with the left slider hidden.

[0026] Figure 3 yes Figure 1 The three-dimensional schematic diagram of the slider on the right side of the middle shows some components omitted.

[0027] Figure 4 yes Figure 1 A local enlarged schematic diagram of point A in the middle.

[0028] Figure 5 yes Figure 4 Schematic diagram of the assembly and disassembly of the middle delay rod and pressure plate, with the viewing angle adjusted.

[0029] in:

[0030] 10. Slider plate; 11. Slider; 12. Protrusion; 20. Ejector plate; 21. Slider ejector; 30. Driving member; 40. Delay rod; 41. First delay rod; 411. Inclined step surface; 42. Second delay rod; 421. Vertical step surface; 422. Groove; 43. T-shaped portion; 50. Pressing plate; 51. Screw; 52. Head; 60. Elastic member; 70. Fixed mold; 71. Support table; 72. First mounting groove; 73. Second mounting groove; 80. Proximity switch; 81. Bracket; 91. Reinforcement rib; 92. Rib position. DETAILED DESCRIPTION

[0031] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0032] The up-down, left-right, front-back directions described in the present invention refer to Figure 2 The up and down, left and right, front and back directions.

[0033] like Figure 2 As shown, the present invention provides two groups of disengagement mechanisms for the injection mold, which are symmetrically distributed along the center of the injection mold. The structures of the two groups of disengagement mechanisms are the same, and the disengagement mechanism located on the right side is used as an example for explanation below.

[0034] like Figures 2 to 5As shown, the injection mold disengagement mechanism provided by the present invention includes: a slider plate 10, an ejector plate 20, a driving member 30, a delay rod 40, a pressure plate 50, and an elastic member 60, wherein the right end surface of the slider plate 10 is used to connect the slider 11, and the slider plate 10 can be slidably connected to the fixed mold 70 to the left and right, and can drive the slider 11 to disengage by sliding to the right; the ejector plate 20 is used to install the slider ejector 21, specifically, the left end of the slider ejector 21 is penetrated on the slider 11, and together with the protrusion 12 on the slider 11, fills the rib position 92 surrounded by the reinforcing rib plate 91, and the right end of the slider ejector 21 penetrates the slider 11 and the slider plate 10 and is connected to the ejector plate 20 The ejector plate 20 is connected to the fixed mold 70 so as to slide left and right, and can drive all the slider ejectors 21 connected thereto to disengage by sliding to the right. The ejector plate 20 is located on the right side of the slider plate 10 and is arranged parallel to and spaced from the slider plate 10. The driving member 30 is fixed to the fixed mold 70 and is connected to the slider plate 10 through a connecting rod penetrating the ejector plate 20. The driving member 30 is used to drive the slider plate 10 to slide left and right. Preferably, the driving member 30 is a hydraulic cylinder. The delay rod 40 extends in the left and right directions, and the delay rod 40 includes a first delay rod 41 and a second delay rod 42. The left end of the first delay rod 41 is connected to the slider plate 10, and the second delay rod 4 The left end of the first delay rod 41 is connected to the ejector plate 20, the first delay rod 41 and the second delay rod 42 are arranged side by side, the upper surface of the first delay rod 41 is provided with an inclined step surface 411 extending downward and rightward, and the upper surface of the second delay rod 42 is provided with a vertical step surface 421 extending vertically downward, the pressing plate 50 is arranged on the fixed mold 70 to be movable up and down, the pressing plate 50 is perpendicular to the delay rod 40, and the elastic member 60 is used to drive the pressing plate 50 to move downward so that the left edge of the bottom of the pressing plate 50 abuts against the inclined step surface 411 and the vertical step surface 421. When the driving member 30 is not in motion, the position of the slider plate 10 connected to the driving member 30 remains fixed. 50 is pressed against the vertical step surface 421, and the ejector plate 20 cannot disengage to the right. Since the slider ejector 21 is filled in the rib position 92, it cannot slide to the left and its position remains fixed. When the driving member 30 drives the slider plate 10 to slide to the right, the slider plate 10 drives the slider 11 to disengage to the right, and drives the first delay rod 41 to move to the right. Through the relative movement of the inclined step surface 411 and the left edge of the bottom of the pressure plate 50, the pressure plate 50 is gradually lifted upward, and finally the pressure plate 50 is disengaged from the vertical step surface 421. When the slider plate 10 continues to move to the right, it can press against and push the ejector plate 20 to the right, thereby realizing the rear disengagement (disengagement to the right) of the slider ejector 21.

[0035] The mechanism only needs one driving member to drive the slider plate to achieve delayed disengagement of the slider and the slider ejector pin, occupies a small space, has a compact structure, is easy to control, is simple to operate, and is not easy to damage.

[0036] In this embodiment, the highest point of the inclined step surface 411 is flush with the highest point of the vertical step surface 421, and the lowest point of the inclined step surface 411 is flush with the lowest point of the vertical step surface 421. The advantage of this arrangement is that it is easy to debug, there is no need to open an avoidance groove on the movable mold, and the movable mold can be simplified.

[0037] To facilitate lifting the pressure plate 50, the angle between the inclined step surface 411 and the upper surface of the first delay rod 41 should be less than or equal to 40°. The angle will also affect the interval time of delayed disengagement. In this embodiment, the angle is 12°.

[0038] In order to avoid relative shaking between the first delay rod 41 and the second delay rod 42, in the present embodiment, a groove 422 for accommodating the first delay rod 41 is provided in the middle of the second delay rod 42. The width of the groove 422 is 0.1-0.3 mm larger than the width of the first delay rod 41, which can both achieve guidance and reduce friction.

[0039] In order to facilitate the fixed connection with the slider plate 10 and the ejector plate 20, the left ends of the first delay rod 41 and the second delay rod 42 are both provided with a T-shaped head 43 for installing a fixing bolt.

[0040] To facilitate support, a support platform 71 is connected to the fixed mold 70. A first mounting groove 72 and a second mounting groove 73 are vertically penetrated on the upper surface of the support platform 71. The pressure plate 50 is embedded in the first mounting groove 71 so as to be movable up and down. Screws 51 are passed through both sides of the pressure plate 50. The lower end of the screw 51 is threadedly connected to the support platform 71. The elastic member 60 is a compression spring passed through the upper end of the screw 51. The two ends of the compression spring are respectively pressed against the head of the screw 51 and the upper surface of the pressure plate 50. The second mounting groove 73 is used to pass the right end of the delay rod 40 for guiding.

[0041] When the driving member 30 is not in motion, the upper surface of the pressing plate 50 is flush with the upper surface of the supporting platform 71 to avoid the formation of an escape groove on the movable mold.

[0042] In order to detect whether the slider ejector pin 21 is disengaged in place, the injection mold disengagement mechanism also includes a proximity switch 80 for detecting the position of the right end of the second delay rod 42. The proximity switch 80 is fixed directly behind the right end of the second delay rod 42 through a bracket 81.

[0043] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the contents of the present invention and implement them accordingly. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. An injection mold disengagement mechanism, comprising: A slider plate, to which a slider is connected; An ejector plate is arranged parallel to and spaced from the slider plate, and the ejector pins of the slider are connected to the ejector plate; A driving member connected to the slider plate; a delay rod extending in the left-right direction; A pressing plate movably arranged on the fixed mold up and down; Elastic parts; Features: The fixed mold is connected to a support platform, and a first mounting groove and a second mounting groove are vertically penetrated on the upper surface of the support platform. The pressing plate is embedded in the first mounting groove so as to be movable up and down, and the second mounting groove is used to pass the right end of the delay rod for guiding; The delay rod comprises a first delay rod and a second delay rod arranged side by side, the left end of the first delay rod is connected to the slider plate, the left end of the second delay rod is connected to the ejector plate, the first delay rod is accommodated in a groove opened in the middle of the second delay rod, the upper surface of the first delay rod is provided with an inclined step surface extending downward and rightward, the upper surface of the second delay rod is provided with a vertical step surface extending vertically downward, the highest point of the vertical step surface is flush with the highest point of the inclined step surface, and the lowest point of the vertical step surface is flush with the lowest point of the inclined step surface; The elastic member is used to drive the pressure plate to move downward so that the left edge of the bottom of the pressure plate abuts against the inclined step surface and the vertical step surface. When the driving member drives the slider plate to slide to the right, the slider plate drives the slider to disengage and drives the first delay rod to move to the right, and gradually lifts the pressure plate upward through the inclined step surface to disengage the pressure plate from the vertical step surface, so that the slider plate can push the ejector plate to the right, thereby realizing the delayed disengagement of the slider ejector.

2. The injection mold release mechanism according to claim 1, characterized in that: The left ends of the first delay rod and the second delay rod are both provided with T-shaped heads so as to be fixedly connected with the slider plate and the ejector plate.

3. The injection mold release mechanism according to claim 1, characterized in that: Screws are provided on both sides of the pressing plate, and the lower ends of the screws are threadedly connected to the supporting platform.

4. The injection mold release mechanism according to claim 3, characterized in that: The elastic member is a compression spring that is inserted through the screw rod, and the two ends of the compression spring are respectively pressed against the head of the screw rod and the upper surface of the pressure plate.

5. The injection mold release mechanism according to claim 1, characterized in that: When the driving member is not in motion, the upper surface of the pressing plate is flush with the upper surface of the supporting platform.

6. The injection mold release mechanism according to claim 1, characterized in that: An included angle between the inclined step surface and an upper surface of the first delay rod is less than or equal to 40°.

7. The injection mold release mechanism according to claim 1, characterized in that: The injection mold disengaging mechanism further includes a proximity switch for detecting a right end position of the second delay rod.

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