Injection mold easy to demold

Abstract

The utility model relates to the technical field of injection molds, and discloses an injection mold easy to demould, which is characterized in that when a top plate is jacked to a certain height by an ejection cylinder, an abutting block can penetrate through a square notch, and the bottom of the abutting block can abut against an arc-shaped part at the top of a drag hook; when the pull hook rotates towards the interior of the square groove by a certain angle, the pull hook cannot continuously pull the cross rod, at the moment, the bottom plate slowly descends through the damper and the buffer spring, then the linkage plate and the linkage groove are not embedded any more, and meanwhile the short sealing plate and the long sealing plate are not embedded any more; part of the side face and part of the bottom face of the formed mold can be demolded, part of the formed mold is located outside the lower mold body along with the ejection of the ejection air cylinder, then local demolding is conducted, workers can take out the mold conveniently, and the situation that the mold is directly impacted by an ejector pin or the mold is damaged is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to an easy-to-release injection mold. Background Art

[0002] An injection mold is a tool used to manufacture injection molded products. It can inject molten plastic into the mold cavity, then cool and solidify to finally obtain the desired plastic product. An injection mold usually consists of an upper mold and a lower mold. The shape and structure of the mold correspond to the shape and size of the desired product. Injection molds can be used to produce various plastic products, such as plastic parts, containers, bottle caps, etc. It is one of the key equipment in the injection molding process and is widely used in industries such as automobiles, home appliances, electronics, and food packaging.

[0003] After injection molding, most existing injection molds are ejected by a cylinder and an ejector. However, when demolding some molds with thin walls, if the ejection impact force is large, the mold may be damaged. If the ejection work is not performed, the molding mold and the mold base are sealed, which is inconvenient for workers to demold, and the demolding efficiency is very low. Utility Model Content

[0004] The utility model aims to provide an easy-to-demold injection mold to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: an easy-to-release injection mold, comprising a lower mold and an upper mold, wherein a demoulding component is arranged inside the lower mold, and the demoulding component comprises:

[0006] An ejector cylinder, the bottom surface of which is fixedly connected to the inner wall of the lower mold, the top surface of which is fixedly connected to a top plate, the injection molding device pulls out the upper mold, so that the inner edge of the upper mold no longer contacts the resistance block, the inner wall of the lower mold is fixedly connected to a damper, the top surface of which is fixedly connected to a bottom plate, the bottom surface of which is fixedly connected to a buffer spring, the bottom end of which is fixedly connected to the inner wall of the lower mold, a through hole is provided on the surface of the bottom plate, and the ejector cylinder passes through the through hole;

[0007] An arc-shaped cavity is provided on the inner side of the lower mold, a resistance block is hinged on the inner side of the arc-shaped cavity, a torsion spring is fixedly connected to the right side surface of the resistance block, and one end of the torsion spring away from the resistance block is fixedly connected to the inner side of the arc-shaped cavity. When the upper mold is pushed in by the injection molding equipment and fitted into the lower mold, the resistance block will shrink into the arc-shaped cavity, and the torsion spring is compressed at the same time. An arc-shaped rod is fixedly connected to the right side surface of the resistance block, and one end of the arc-shaped rod away from the resistance block passes through the arc-shaped cavity.

[0008] Preferably, a linkage groove is provided on the surface of the top plate. When the top plate is lifted to a certain height by the ejection cylinder, the pull hook will rotate to a certain angle into the square groove and the pull hook cannot continue to hold the cross bar. A short sealing plate is fixedly connected to the top surface of the top plate, and a square groove is provided on the side of the top plate, and a cross bar is fixedly connected to the inner side of the square groove.

[0009] Preferably, a square notch is provided at the top of the square groove, and the width of the square notch is the same as the width of the resistance block. The square notch is aligned with the vertical position of the resistance block. When the top plate moves upward, when the top plate is lifted to a certain height by the ejection cylinder, the resistance block will pass through the square notch.

[0010] Preferably, the top surface of the bottom plate is fixedly connected with a linkage plate, the size of the linkage plate is the same as the shape of the linkage groove, the linkage plate and the linkage groove are no longer engaged, and the short sealing plate and the long sealing plate are no longer engaged, and the side and a part of the bottom surface of the formed mold will be demoulded, and the linkage plate can be engaged with the linkage groove, and the top surface of the linkage plate is fixedly connected with a long sealing plate, when the demoulding assembly is not in use, the bottom surface of the top plate and the top surface of the bottom plate are in a tight fit, and the linkage plate is tightly engaged inside the linkage groove, and the long sealing plate is engaged between the short sealing plates.

[0011] Preferably, a draw hook is hinged on the top surface of the bottom plate, a second torsion spring is fixedly connected to the left side of the draw hook, and one end of the second torsion spring away from the draw hook is fixedly connected to the top surface of the bottom plate.

[0012] Preferably, the cross section of the resistance block is triangular, and the inclined surface of the resistance block faces upward, and when the upper mold is pushed into and embedded in the lower mold by the injection molding equipment, the inner edge of the upper mold will gradually resist the inclined surface of the resistance block.

[0013] Compared with the prior art, the utility model provides an easy-to-release injection mold, which has the following beneficial effects:

[0014] 1. For the easy-to-demold injection mold, when the top plate is lifted to a certain height by the ejection cylinder, the resistance block will pass through the square notch, and the bottom of the resistance block will resist the arc-shaped part of the top of the hook, causing the hook to rotate a certain angle into the square groove and making it impossible for the hook to continue to hold the cross bar. At this time, the bottom plate will slowly descend through the damper and the buffer spring, so that the linkage plate and the linkage groove will no longer fit together, and the short sealing plate and the long sealing plate will no longer fit together, and a part of the side and bottom surface of the molded mold will be demolded, and as the ejection cylinder lifts the top plate, a part of the molded mold will be outside the lower mold, and then local demolding will be performed, and it is convenient for the staff to take out the mold to avoid the ejector directly hitting the mold or causing damage to the mold.

[0015] 2. For the easy-to-demold injection mold, when the pull hook is resisted by the resistance block and no longer holds the cross bar, the molded mold will be partially demolded. At this time, air will enter the bottom of the molding mold through the linkage groove, so that the molding mold and the lower mold are no longer completely sealed, which makes it easier for the staff to take out the mold and improves the demolding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the cross-sectional structure of the lower mold of the utility model;

[0018] Figure 3 This is an enlarged structural diagram of the bottom plate of the utility model;

[0019] Figure 4 It is a schematic diagram of the enlarged structure of the top plate of the utility model.

[0020] In the figure: 1. lower mold; 2. demoulding assembly; 21. ejection cylinder; 22. top plate; 23. damper; 24. bottom plate; 25. buffer spring; 26. through hole; 27. arc cavity; 28. resistance block; 29. ​​torsion spring 1; 210. arc rod; 211. linkage groove; 212. short sealing plate; 213. square groove; 214. square notch; 215. cross bar; 216. linkage plate; 217. long sealing plate; 218. draw hook; 219. torsion spring 2; 3. upper mold. DETAILED DESCRIPTION

[0021] like Figure 1-Figure 4 As shown, the utility model provides a technical solution: an easy-to-demold injection mold, including a lower mold 1 and an upper mold 3, a demolding component 2 is arranged inside the lower mold 1, and the demolding component 2 includes: an ejection cylinder 21, a top plate 22, a damper 23, a bottom plate 24, a buffer spring 25, a through hole 26, an arc cavity 27, an abutment block 28, a torsion spring 1 29, an arc rod 210, a linkage groove 211, a short sealing plate 212, a square groove 213, a square notch 214, a cross bar 215, a linkage plate 216, a long sealing plate 217, a draw hook 218, and a torsion spring 219.

[0022] The bottom surface of the ejection cylinder 21 is fixedly connected to the inner wall of the lower mold 1, and the top surface of the ejection cylinder 21 is fixedly connected to the top plate 22. After the mold is formed, the injection molding equipment pulls out the upper mold 3, so that the inner edge of the upper mold 3 no longer contacts the contact block 28, and the compressed torsion spring 29 will push the contact block 28 to reset. At this time, the ejection cylinder 21 is started, and the ejection cylinder 21 will push the top plate 22 to move upward. The inner wall of the lower mold 1 is fixedly connected to the damper 23, and the top surface of the damper 23 is fixedly connected to the bottom plate 24. The bottom surface of the bottom plate 24 is fixedly connected to the buffer spring 25. The bottom end of the buffer spring 25 is fixedly connected to the inner wall of the lower mold 1. A through hole 26 is opened on the surface of the bottom plate 24, and the ejection cylinder 21 passes through the through hole 26. The arc cavity 27 is opened on the inner side of the lower mold 1. A resistance block 28 is hinged on the inner side of the arc cavity 27. A torsion spring 29 is fixedly connected to the right side surface of the resistance block 28. One end of the torsion spring 29 away from the resistance block 28 is fixedly connected to the inner side of the arc cavity 27. When the upper mold 3 is pushed into and fitted into the lower mold 1 by the injection molding equipment, the inner edge of the upper mold 3 will gradually resist the inclined surface of the resistance block 28, so that the resistance block 28 pushes the arc rod 210 to gradually insert into the arc cavity 27. At the same time, the resistance block 28 will shrink into the arc cavity 27. At the same time, the torsion spring 29 is compressed. The right side surface of the resistance block 28 is fixedly connected to the arc rod 210. One end of the arc rod 210 away from the resistance block 28 passes through the arc cavity 27. A linkage groove 211 is provided on the surface of the top plate 22. When the top plate 22 is lifted up to a certain height by the ejection cylinder 21, the abutment block 28 will pass through the square notch 214, and the bottom of the abutment block 28 will abut the arc-shaped part at the top of the hook 218, causing the hook 218 to rotate a certain angle into the square groove 213 and making it impossible for the hook 218 to continue to hold the cross bar 215. At this time, the bottom plate 24 will slowly descend through the damper 23 and the buffer spring 25, so that the linkage plate 216 and the linkage groove 211 are no longer engaged. A short sealing plate 212 is fixedly connected to the top surface of the top plate 22, and a square groove 213 is provided on the side of the top plate 22, and a cross bar 215 is fixedly connected to the inner side of the square groove 213. A square notch 214 is provided at the top of the square groove 213, and the width of the square notch 214 is the same as the width of the resistance block 28. The square notch 214 is aligned with the vertical position of the resistance block 28. When the top plate 22 moves upward, the cross bar 215 fixedly connected in the square groove 213 will pull the inner side of the hook 218 and pull up the bottom plate 24 through the hook 218. When the top plate 22 is lifted to a certain height by the ejection cylinder 21, the resistance block 28 will pass through the square notch 214.The top surface of the bottom plate 24 is fixedly connected with a linkage plate 216, the size of the linkage plate 216 is the same as the shape of the linkage groove 211, the linkage plate 216 and the linkage groove 211 are no longer fitted, and the short sealing plate 212 and the long sealing plate 217 are no longer fitted, and the side and bottom of the molded mold are partially demoulded, and as the ejection cylinder 21 lifts the top plate 22, a part of the molded mold will be outside the lower mold 1, and then partial demoulding is performed, and it is convenient for the staff to take out the mold , to prevent the ejector pin from directly hitting the mold or causing damage to the mold, and the linkage plate 216 can be embedded in the linkage groove 211, and the top surface of the linkage plate 216 is fixedly connected with a long sealing plate 217, connecting the lower mold 1 and the upper mold 3 to the injection molding equipment. When the demoulding assembly 2 is not in use, the bottom surface of the top plate 22 and the top surface of the bottom plate 24 are in a tightly fitted state, and the linkage plate 216 is tightly embedded in the linkage groove 211, and the long sealing plate 217 is embedded between the short sealing plates 212. The top surface of the bottom plate 24 is hinged with a hook 218, and the left side of the hook 218 is fixedly connected with a torsion spring 219, and the end of the torsion spring 219 away from the hook 218 is fixedly connected to the top surface of the bottom plate 24. The cross section of the abutment block 28 is triangular, and the inclined surface of the abutment block 28 faces upward. When the upper mold 3 is pushed into and fitted into the lower mold 1 by the injection molding equipment, the inner edge of the upper mold 3 will gradually abut the inclined surface of the abutment block 28 .

[0023] Based on the above embodiment, the lower mold 1 and the upper mold 3 are connected to the injection molding equipment. When the demolding assembly 2 is not in use, the bottom surface of the top plate 22 and the top surface of the bottom plate 24 are in a tightly fitted state, and the linkage plate 216 is tightly fitted inside the linkage groove 211. At the same time, the long sealing plate 217 is fitted between the short sealing plates 212. When the upper mold 3 is pushed into and fitted into the lower mold 1 by the injection molding equipment, the inner edge of the upper mold 3 gradually contacts the inclined surface of the contact block 28, thereby causing the contact block 28 to The arc rod 210 is pushed to gradually insert into the arc cavity 27, and the abutment block 28 is retracted into the arc cavity 27, and the torsion spring 29 is compressed. After the mold is formed, the injection molding equipment pulls out the upper mold 3, so that the inner edge of the upper mold 3 no longer abuts the abutment block 28, and the compressed torsion spring 29 pushes the abutment block 28 to reset. At this time, the ejection cylinder 21 is started, and the ejection cylinder 21 pushes the top plate 22 to move upward. When the top plate 22 moves upward, the fixed The connected cross bar 215 will pull the inner side of the hook 218 and pull up the bottom plate 24 through the hook 218. When the top plate 22 is lifted up to a certain height by the ejection cylinder 21, the abutment block 28 will pass through the square notch 214, and the bottom of the abutment block 28 will abut the arc-shaped part of the top of the hook 218, so that the hook 218 will rotate a certain angle into the square groove 213 and the hook 218 can no longer hold the cross bar 215. At this time, the bottom plate 24 will be connected to the buffer through the damper 23. The spring 25 slowly descends, so that the linkage plate 216 and the linkage groove 211 are no longer engaged, and the short sealing plate 212 and the long sealing plate 217 are no longer engaged, and a part of the side and bottom of the molded mold will be demoulded, and as the ejection cylinder 21 lifts the top plate 22, a part of the molded mold will be outside the lower mold 1, and then local demoulding will be performed, and it is convenient for the staff to take out the mold to avoid the ejector pin directly hitting the mold or causing damage to the mold.

[0024] At the same time, when the pull hook 218 is resisted by the resistance block 28 and no longer holds the cross bar 215, the formed mold will be partially demolded. At this time, air will enter the bottom of the forming mold through the linkage groove 211, so that the formed mold and the lower mold 1 are no longer completely sealed, which makes it easier for the staff to take out the mold and improves the demolding efficiency.

[0025] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An easy-to-release injection mold, comprising a lower mold (1) and an upper mold (3), characterized in that: A demoulding assembly (2) is arranged inside the lower mold (1), and the demoulding assembly (2) comprises: An ejection cylinder (21), wherein the bottom surface of the ejection cylinder (21) is fixedly connected to the inner wall of the lower mold (1), the top surface of the ejection cylinder (21) is fixedly connected to a top plate (22), the inner wall of the lower mold (1) is fixedly connected to a damper (23), the top surface of the damper (23) is fixedly connected to a bottom plate (24), the bottom surface of the bottom plate (24) is fixedly connected to a buffer spring (25), the bottom end of the buffer spring (25) is fixedly connected to the inner wall of the lower mold (1), a through hole (26) is provided on the surface of the bottom plate (24), and the ejection cylinder (21) passes through the through hole (26); An arc-shaped cavity (27), wherein the arc-shaped cavity (27) is opened on the inner side of the lower mold (1), a resistance block (28) is hingedly connected to the inner side of the arc-shaped cavity (27), a torsion spring (29) is fixedly connected to the right side surface of the resistance block (28), an end of the torsion spring (29) away from the resistance block (28) is fixedly connected to the inner side of the arc-shaped cavity (27), an arc-shaped rod (210) is fixedly connected to the right side surface of the resistance block (28), and an end of the arc-shaped rod (210) away from the resistance block (28) passes through the arc-shaped cavity (27).

2. The easy-to-release injection mold according to claim 1, characterized in that: A linkage groove (211) is provided on the surface of the top plate (22), a short sealing plate (212) is fixedly connected to the top surface of the top plate (22), a square groove (213) is provided on the side surface of the top plate (22), and a cross bar (215) is fixedly connected to the inner side of the square groove (213).

3. The easy-to-release injection mold according to claim 2, characterized in that: A square notch (214) is provided at the top of the square groove (213), and the width of the square notch (214) is the same as the width of the abutment block (28), and the vertical positions of the square notch (214) and the abutment block (28) are aligned.

4. The easy-to-release injection mold according to claim 2, characterized in that: A linkage plate (216) is fixedly connected to the top surface of the bottom plate (24); the linkage plate (216) has the same size and shape as the linkage groove (211); and a long sealing plate (217) is fixedly connected to the top surface of the linkage plate (216).

5. The easy-to-release injection mold according to claim 1, characterized in that: A draw hook (218) is hinged on the top surface of the bottom plate (24), a torsion spring 2 (219) is fixedly connected to the left side of the draw hook (218), and one end of the torsion spring 2 (219) away from the draw hook (218) is fixedly connected to the top surface of the bottom plate (24).

6. The easy-to-release injection mold according to claim 1, characterized in that: The cross section of the abutment block (28) is triangular, and the inclined surface of the abutment block (28) faces upward.

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