Plastic mold with ejection mechanism

Abstract

The utility model discloses a plastic mould with an ejection mechanism, which comprises a mounting plate, a pulling template, a front template and a rear template, and further comprises a pulling plug, an air pipe and a movable plug, the mounting plate comprises a front mounting plate and a rear mounting plate, and a drawing template, a front template and a rear template are sequentially mounted between the front mounting plate and the rear mounting plate; the drawing die plate and the front die plate are movably connected through a drawing plug; a transversely through ejection vent hole is formed in the front mold plate, and the movable plug is movably arranged in the ejection vent hole through the drawing mold plate; one end of the air pipe is communicated with the ejection vent hole, and the other end of the air pipe extends out of the front template and is connected with an industrial air pump. According to the utility model, the ejection vent hole, the air pipe and the movable plug are arranged; the air outlet of the air pipe can be automatically opened and closed during mold opening and mold closing through the movement of the movable plug and the mold drawing plate; then the product is separated from the front mold cavity through high-pressure gas, and demolding is completed; gas acts on the whole front mold cavity, so that a product is uniformly stressed and is prevented from being deformed and damaged.

Description

Technical Field

[0001] The utility model relates to the technical field of plastic molds, in particular to a plastic mold with an ejection mechanism. Background Art

[0002] Plastic molds are equipment used to manufacture plastic products. After the plastic mold is injection molded, workers also need to take the product out of the mold. However, after the product is injection molded, the product is in close contact with the inner cavity of the mold, making it difficult to take out. Therefore, it is necessary to set an ejection device in the plastic mold in advance to facilitate workers to take out the product later.

[0003] For example, the utility model patent with application number CN202310928670.9 discloses a plastic mold with an automatic ejection mechanism, including a base, a first lower mold and a second lower mold for mold closing are installed on the top of the base, the first lower mold is located on one side of the second lower mold, a positioning rod, an upper mold, a cylinder, a transmission unit, a transmission belt, a first rack; an ejection mechanism, a second rack, a bottom plate, and a push rod. By setting the transmission unit and the ejection mechanism, when the upper film moves upward under the push and pull force of the cylinder, the second lower mold can be separated from the first lower mold when the mold opening operation is realized, and the continuous upward movement of the upper mold will continue to drive the bottom plate and the push rod to move upward, so that the mold attached to the bottom plate is separated from the bottom plate under the thrust of the push rod, thereby achieving the purpose of synchronously ejecting and separating the mold during the mold opening process, reducing the driving unit, reducing energy consumption, and making the operation process coherent, further improving work efficiency.

[0004] Although this plastic mold with an automatic ejection mechanism achieves the purpose of ejecting and separating the mold synchronously during the mold opening process, reduces the drive unit, reduces energy consumption, and has a coherent operation process, further improving work efficiency, the product is ejected by the ejector rod, which directly acts on the product and may cause product deformation or ejection surface damage; further improvement is needed. Utility Model Content

[0005] The utility model aims to provide a plastic mold with an ejection mechanism, aiming to improve the problem that the plastic mold ejects products through an ejector rod, which may cause product deformation or ejection surface damage due to the direct action of the ejector rod on the product.

[0006] The utility model is implemented as follows: a plastic mold with an ejection mechanism, comprising a mounting plate, a drawing plate, a front plate and a rear plate, and also comprising a draw bolt, an air pipe and a movable plug; the mounting plate comprises a front mounting plate and a rear mounting plate, and the drawing plate, the front plate and the rear plate are sequentially mounted between the front mounting plate and the rear mounting plate; the drawing plate and the front plate are movably connected by a draw bolt; a transversely penetrating ejection air hole is arranged in the front plate, and the movable plug is movably arranged in the ejection air hole through the drawing plate; the air pipe is embedded in the front plate, one end of the air pipe is connected to the ejection air hole, and the other end extends to the outside of the front plate and is connected to an industrial air pump.

[0007] Preferably, the pull bolt includes a bolt rod, a limiting bolt head and a bolt groove, and a plurality of bolt grooves are arranged on a side of the front template close to the pulling template, and the port diameter of the bolt groove is smaller than the internal diameter; bolt rods are fixedly arranged at the positions of the bolt grooves corresponding to each other on the pulling template, and the end of the bolt rod away from the pulling template is arranged in the bolt groove, and a limiting bolt head is fixedly arranged on the end, and the limiting bolt head is movably arranged in the bolt groove.

[0008] Preferably, the front template includes a front mold cavity, and the front mold cavity is arranged on a side of the front template close to the rear template; the ejection air hole is arranged in the front mold cavity at one end away from the pulling template; the movable plug is slidably arranged in the ejection air hole, and the end of the movable plug close to the front mold cavity is adapted to the inner shape of the front mold cavity, and the other end is fixedly arranged on the pulling template.

[0009] Preferably, the rear mold plate comprises a rear mold cavity and a gate, and the rear mold plate is provided with a matching rear mold cavity at a position corresponding to the front mold cavity, and the rear mold cavity is provided with a gate.

[0010] Preferably, a plurality of pull rod sleeves are inlaid and installed on a surface of the front template close to the rear template, and pull rods are detachably installed at positions of the rear template corresponding to the pull rod sleeves, and the pull rods are adapted to be detachably installed in the pull rod sleeves.

[0011] Preferably, the pull rod is made of elastic material, an elastic convex ring is provided on the surface of the pull rod, and the pull rod is detachably inserted into the pull rod sleeve through the elastic convex ring.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model is provided with an ejection air hole, an air pipe and a movable plug; the air outlet of the air pipe can be automatically opened and closed during mold opening and mold closing by moving the movable plug and the drawing plate; then the product and the front mold cavity are separated by high-pressure gas to complete demoulding; there is no need to eject the product by a push rod, and at the same time, the gas acts on the entire front mold cavity, so that the product is evenly stressed and deformation and damage of the product are avoided.

[0014] 2. The utility model provides a pull rod sleeve and a pull rod, so that the pull rod sleeve and the pull rod can open the front template and the rear template after the pull template is fully pulled out through a clamping relay, thereby preventing the active plug from closing the air hole due to incomplete opening of the pull template, thereby ensuring the normal operation of the ejection air hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] Figure 2 It is a cross-sectional structural schematic diagram of the front side of the utility model;

[0017] Figure 3 It is a structural schematic diagram of the utility model drawing template;

[0018] Figure 4 This utility model Figure 2 The structural diagram at A in the middle;

[0019] Figure 5 This utility model Figure 2 The structural diagram at B in the middle;

[0020] Figure 6 It is a structural schematic diagram of the front template of the utility model;

[0021] Figure 7 It is a structural schematic diagram of the rear template of the utility model.

[0022] In the figure: 1. front mounting plate; 2. pull template; 3. pull bolt; 301. bolt rod; 302. limit bolt head; 303. bolt groove; 4. front template; 401. front mold cavity; 402. ejector vent; 403. pull rod sleeve; 5. rear template; 501. pull rod; 502. rear mold cavity; 503. gate; 6. rear mounting plate; 7. air pipe; 8. movable plug. DETAILED DESCRIPTION

[0023] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0024] The following is a further description with reference to the accompanying drawings and specific embodiments:

[0025] Example 1

[0026] like Figure 1-Figure 4 As shown, a plastic mold with an ejection mechanism includes a mounting plate, a drawing plate 2, a front plate 4 and a rear plate 5, and also includes a draw bolt 3, an air pipe 7 and a movable plug 8; the mounting plate includes a front mounting plate 1 and a rear mounting plate 6, and the drawing plate 2, the front plate 4 and the rear plate 5 are sequentially installed between the front mounting plate 1 and the rear mounting plate 6; the mold is installed in an injection molding machine through the mounting plate, and the drawing plate 2 and the front plate 4 are movably connected through the draw bolt 3; the draw bolt 3 includes a bolt rod 301, a limit bolt head 302 and a bolt groove 303, and a plurality of bolt grooves 303 are arranged on a side of the front plate 4 close to the drawing plate 2, The bolt groove 303 is 20 cm deep, the port diameter of the bolt groove 303 is 2 cm, the internal diameter is 4 cm, the port depth of the bolt groove 303 with a diameter of 2 cm is 2 cm, and the internal depth of the 4 cm diameter is 18 cm; the positions of the bolt grooves 303 corresponding to the drawing template 2 are fixedly provided with bolt rods 301, the length of the bolt rod 301 is 17 cm, the diameter of the bolt rod 301 is 2 cm, the end of the bolt rod 301 away from the drawing template 2 is set in the bolt groove 303, and the end is fixedly provided with a limit bolt head 302 with a diameter of 4 cm and a height of 3 cm, and the limit bolt head 302 is movably set in the bolt groove 303.

[0027] like Figure 1 and Figure 5-Figure 7 As shown, a transversely penetrating ejection hole 402 is provided in the front template 4, and a movable plug 8 is movably arranged in the ejection hole 402 through the drawing template 2. The diameter of the movable plug 8 is the same as that of the ejection hole 402, and the contact surfaces of the movable plug 8 and the ejection hole 402 are polished; the air pipe 7 is embedded in the front template 4, one end of the air pipe is connected to the ejection hole 402, and the other end extends to the outside of the front template 4 and is connected to an industrial air pump; when the mold is closed, the movable plug 8 covers the air outlet of the air pipe 7, and when the mold is opened, the movable plug 8 leaves the air outlet of the air pipe 7, the front template 4 includes a front mold cavity 401, and the front mold cavity 401 is arranged on a side of the front template 4 close to the rear template 5; the end of the ejection hole 402 away from the drawing template is arranged in the front mold cavity 401; the movable plug 8 slides The movable plug 8 is movably arranged in the top vent hole 402, one end of the movable plug 8 close to the front mold cavity 401 is adapted to the shape of the cavity of the front mold cavity 401, and the other end is fixedly arranged on the drawing template 2; the rear mold template 5 includes a rear mold cavity 502 and a gate 503, and the rear mold template 5 is provided with a matching rear mold cavity 502 at the position corresponding to the front mold cavity 401, and the gate 503 is provided in the rear mold cavity 502; a plurality of pull rod sleeves 403 are inlaid and installed on one side of the front mold template 4 close to the rear mold template 5, and the rear mold template 5 can be detachably installed with pull rods 501 at the positions corresponding to the pull rod sleeves 403, and the pull rods 501 are adapted and detachably installed in the pull rod sleeves 403; the pull rod 501 is made of elastic material, and an elastic convex ring is provided on the surface of the pull rod 501, and the pull rod 501 can be detachably inserted in the pull rod sleeve 403 through the elastic convex ring.

[0028] Example 2

[0029] like Figure 1-Figure 4 As shown, a plastic mold with an ejection mechanism includes a mounting plate, a drawing plate 2, a front plate 4 and a rear plate 5, and also includes a pull bolt 3, an air pipe 7 and a movable plug 8; the mounting plate includes a front mounting plate 1 and a rear mounting plate 6, and the drawing plate 2, the front plate 4 and the rear plate 5 are installed in sequence between the front mounting plate 1 and the rear mounting plate 6; the drawing plate 2 and the front plate 4 are movably connected through the pull bolt 3; the pull bolt 3 includes a bolt rod 301, a limiting bolt head 302 and a bolt groove 303, and a plurality of bolt grooves 303 are arranged on a side of the front plate 4 close to the drawing plate 2, and the port diameter of the bolt groove 303 is smaller than the internal diameter; bolt rods 301 are fixedly arranged at the positions of the bolt grooves 303 of the drawing plate 2, and the end of the bolt rod 301 away from the drawing plate 2 is arranged in the bolt groove 303, and a limiting bolt head 302 is fixedly arranged at the end, and the limiting bolt head 302 is movably arranged in the bolt groove 303.

[0030] like Figure 1 and Figure 5-Figure 7 As shown, the front template 4 is provided with a transversely penetrating ejection hole 402, and the movable plug 8 is movably arranged in the ejection hole 402 through the drawing template 2; the air pipe 7 is embedded in the front template 4, one end of the air pipe is connected to the ejection hole 402, and the other end extends to the outside of the front template 4 and is connected to an industrial air pump; the front template 4 includes a front mold cavity 401, and the front mold cavity 401 is arranged on a side of the front template 4 close to the rear template 5; the ejection hole 402 is arranged in the front mold cavity 401 at one end away from the drawing template; the movable plug 8 is slidably arranged in the ejection hole 402, and the end of the movable plug 8 close to the front mold cavity 401 is adapted to the shape of the cavity inside the front mold cavity 401, and the other end is adapted to the shape of the cavity inside the front mold cavity 401. One end is fixedly set on the drawing template 2; the rear template 5 includes a rear mold cavity 502 and a gate 503, and the rear mold cavity 502 is matched with the position of the rear mold cavity 401, and the gate 503 is set in the rear mold cavity 502; a plurality of pull rod sleeves 403 are inlaid and installed on the side of the front template 4 close to the rear template 5, and the positions of the pull rod sleeves 403 of the rear template 5 can be detachably installed with pull rods 501, and the pull rods 501 are matched and detachably installed in the pull rod sleeves 403; the pull rod 501 is made of elastic material, and an elastic convex ring is set on the surface of the pull rod 501, and the pull rod 501 can be detachably inserted in the pull rod sleeve 403 through the elastic convex ring.

[0031] The working principle of the utility model is as follows: after the injection molding of the plastic mold is completed, the injection molding machine starts to open the mold, and the injection molding machine driving device drives the pulling template 2 to open the mold through the mounting plate. At this time, the pull rod 501 is inserted in the pull rod sleeve 403, and the clamping force of the pull rod 501 and the pull rod sleeve 403 prevents the front template 4 and the rear template 5 from opening in advance; when the pulling template 2 drives the limit bolt head 302 to move to the bolt groove 303 port, the front template simultaneously drives the movable plug 8 to disengage from the ejection air hole, and the industrial air pump starts to inflate the ejection air hole. When the pulling template 2 continues to open the mold, the pull bolt 3 will drive the front template 4 to move backward, so that the pull rod 501 is separated from the pull rod sleeve 403, and then the product is ejected from the front mold cavity 401 by gas.

[0032] In summary, the utility model provides an ejector hole 402, an air pipe 7 and a movable plug 8; the movable plug 8 and the drawing plate 2 are moved to automatically open and close the air outlet of the air pipe 7 during mold opening and mold closing; then the product and the front mold cavity are separated by high-pressure gas to complete demolding; there is no need to eject the product by a push rod, and at the same time, the gas acts on the entire front mold cavity to make the product evenly stressed, thereby avoiding deformation and damage to the product; by providing a pull rod sleeve 403 and a pull rod 501, the pull rod sleeve 403 and the pull rod 501 can be used to open the front template 4 and the rear template 5 after the drawing template 2 is completely pulled out through a clamping force, thereby preventing the pulling template 2 from being incompletely opened, causing the movable plug 8 to close the air pipe 7, thereby ensuring the normal operation of the ejector hole 402.

[0033] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be modified and varied in various ways. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A plastic mold with an ejection mechanism, comprising a mounting plate, a drawing plate (2), a front plate (4) and a rear plate (5), characterized in that: It also includes a pull bolt (3), an air pipe (7) and a movable plug (8); the mounting plate includes a front mounting plate (1) and a rear mounting plate (6), and a pull template (2), a front template (4) and a rear template (5) are sequentially mounted between the front mounting plate (1) and the rear mounting plate (6); the pull template (2) and the front template (4) are movably connected via the pull bolt (3); a transversely penetrating ejection hole (402) is arranged in the front template (4), and the movable plug (8) is movably arranged in the ejection hole (402) via the pull template (2); the air pipe (7) is embedded in the front template (4), one end of the air pipe is connected to the ejection hole (402), and the other end extends to the outside of the front template (4) and is connected to an industrial air pump.

2. A plastic mold with an ejection mechanism according to claim 1, characterized in that: The pull bolt (3) comprises a bolt rod (301), a limit bolt head (302) and a bolt groove (303); a plurality of bolt grooves (303) are arranged on a side of the front template (4) close to the pull template (2); the port diameter of the bolt groove (303) is smaller than the internal diameter; bolt rods (301) are fixedly arranged at positions of the bolt grooves (303) corresponding to each other on the pull template (2); one end of the bolt rod (301) away from the pull template (2) is arranged in the bolt groove (303), and a limit bolt head (302) is fixedly arranged at the end; the limit bolt head (302) is movably arranged in the bolt groove (303).

3. A plastic mold with an ejection mechanism according to claim 1, characterized in that: The front template (4) comprises a front mold cavity (401), and the front mold cavity (401) is arranged on a side of the front template (4) close to the rear template (5); the ejection vent (402) is arranged in the front mold cavity (401) at one end away from the drawing template; the movable plug (8) is slidably arranged in the ejection vent (402), and one end of the movable plug (8) close to the front mold cavity (401) is adapted to the shape of the cavity of the front mold cavity (401), and the other end is fixedly arranged on the drawing template (2).

4. A plastic mold with an ejection mechanism according to claim 3, characterized in that: The rear mold plate (5) comprises a rear mold cavity (502) and a gate (503); the rear mold cavity (502) corresponding to the position of the front mold cavity (401) is provided on the rear mold plate (5), and the gate (503) is provided in the rear mold cavity (502).

5. The plastic mold with an ejection mechanism according to claim 1, characterized in that: A plurality of pull rod sleeves (403) are embedded and installed on one side of the front template (4) close to the rear template (5), and pull rods (501) are detachably installed at positions corresponding to the pull rod sleeves (403) on the rear template (5), and the pull rods (501) are adapted to be detachably installed in the pull rod sleeves (403).

6. A plastic mold with an ejection mechanism according to claim 5, characterized in that: The pull rod (501) is made of elastic material, and an elastic convex ring is provided on the surface of the pull rod (501). The pull rod (501) can be detachably inserted into the pull rod sleeve (403) via the elastic convex ring.

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