Multi-insert combined type injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses a multi-insert combined type injection mold, which comprises a lower mold base and an upper mold base, a control part is arranged in the lower mold base, the control part comprises a demolding cylinder, the multi-insert combined type injection mold can drive a sealing block to move downwards together when a supporting plate moves downwards, and the sealing block is driven to move downwards when the supporting plate moves downwards. When the clamping hook exceeds the limiting rod, the torsional spring can bounce the elastic piece and clamp the clamping hook into the bottom side of the limiting rod, after injection molding is completed, the upper mold base is lifted, then the demolding air cylinder is started, the demolding air cylinder can jack up the first insert firstly, but the clamping hook still hooks the limiting rod, and then the first insert and the second insert are separated from each other. Therefore, the second insert cannot rise, the first insert and the second insert are not embedded any more, external air enters the interior, a workpiece formed in the lower die base is not sealed any more with the first insert and the second insert, air tightness is lost, and demolding is more convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a multi-insert combined injection mold. Background Art

[0002] Injection mold is a tool used for mass production of plastic parts. Its basic structure includes front mold plate, front mold core, rear mold plate, rear mold core, ejector plate, ejector, guide pin, guide sleeve, reset rod, pull rod, gate sleeve, parting surface, exhaust groove and other parts. The working principle of injection mold is to inject the heated and melted plastic melt into the mold cavity through the high pressure injection molding machine, and obtain the molded plastic product after cooling and hardening. Injection mold is widely used in the fields of automobile, electronics, medical, home furnishing, etc., and is an indispensable and important equipment in the production of plastic products.

[0003] In the existing mold forming manufacturing industry, after the mold is cooled after injection molding, the demoulding method mostly adopts ejector demoulding. However, this demoulding method is easy to cause deformation and damage of some thin workpieces when demoulding, making the workpiece unusable or defective. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-insert combined injection mold to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a multi-insert combined injection mold, comprising a lower mold base and an upper mold base, wherein a control unit is arranged inside the lower mold base, and the control unit comprises:

[0006] A demoulding cylinder, the bottom of which is fixedly connected to the inner wall of the lower mold base, the top surface of which is fixedly connected to an insert 1, the top surface of which is fixedly connected to a sealing plate, the upper mold base is pushed downward by the injection molding equipment, so that the upper mold base pushes the sealing plate, so that the sealing plate drives the insert 1 to engage with the insert 2, thereby ensuring air tightness during injection molding, and the side of the sealing plate is fixedly connected to a trapezoidal block;

[0007] The top surface of the mold base is fixedly connected with a sealing block, and a spring is hinged on the inner side of the sealing block. The bottom surface of the spring is fixedly connected with a hook, and the arc-shaped part of the bottom end of the hook contacts the limit rod, forcing the spring to rotate and contract the torsion spring. When the hook exceeds the limit rod, the torsion spring will bounce the spring and clamp the hook into the bottom side of the limit rod. A torsion spring is fixedly connected between the spring and the inner side of the sealing block.

[0008] Preferably, a transverse groove and a vertical groove are provided on the inner side of the lower die base, and the trapezoidal block passes through the vertical groove and is slidably connected.

[0009] Preferably, the lower mold base is penetrated by a rotating rod and is rotatably connected to the rotating rod. A trigger rod is penetrated and fixedly connected to the top end of the rotating rod. When the insert is raised, the sealing plate will move upward together. When the sealing plate rises to the top, the trapezoidal block will be driven to rise to the top along the vertical groove, so that the inclined surface of the trapezoidal block contacts the trigger rod. The bottom end of the rotating rod is penetrated and fixedly connected to a toggle rod.

[0010] Preferably, a toggle groove is provided at the bottom end of the vertical groove, and the toggle rod is located inside the toggle groove.

[0011] Preferably, a spring 1 is fixedly connected to the inner wall of the lower die seat. After the hook and the notch of the limit rod overlap, the hook can no longer hook the limit rod, so that the spring 1 lifts the support plate, so that the support plate drives the insert 2 to apply a certain degree of impact force to the bottom of the formed workpiece, and the top end of the spring 1 is fixedly connected to the bottom surface of the support plate.

[0012] Preferably, a spiral spring is fixedly connected to the surface of the rotating rod, and one end of the spiral spring away from the rotating rod is fixedly connected to the inner wall of the lower mold base.

[0013] Preferably, the inner side of the transverse groove is fixedly connected with connecting block 1 and connecting block 2, the inner side of the connecting block 2 passes through and is slidably connected with a limiting rod, the upper mold seat pushes the sealing plate, so that the support plate moves downward together, and when the support plate moves downward, the damper will contract and the spring 1 will be compressed, and when the support plate moves downward, the sealing block will be driven to move downward together, the limiting rod passes through and is fixedly connected with a linkage plate, the inclined surface of the trapezoidal block resists the trigger rod, thereby forcing the trigger rod to rotate a certain distance, and the trigger rod will drive the rotating rod to rotate, and a spring 2 is fixedly connected between the linkage plate and the connecting block 2.

[0014] Compared with the prior art, the utility model provides a multi-insert combined injection mold, which has the following beneficial effects:

[0015] 1. The multi-insert combined injection mold will drive the sealing block to move downward when the support plate moves downward, so that the arc-shaped part at the bottom end of the hook will contact the limit rod, forcing the spring to rotate and contract the torsion spring. When the hook exceeds the limit rod, the torsion spring will pop up the spring and clamp the hook into the bottom side of the limit rod. After the injection molding is completed, the upper mold base is raised, and then the demoulding cylinder is started. The demoulding cylinder will first lift the insert one, but the hook still hooks the limit rod, so that the insert two will not rise, and then the insert one and the insert two will no longer fit together, allowing external air to enter the interior, so that the workpiece formed in the lower mold base and the insert one and the insert two are no longer sealed and lose airtightness, which is more convenient for demoulding.

[0016] 2. In the multi-insert combined injection mold, the trigger rod drives the rotating rod to rotate, and the rotating rod drives the toggle rod to toggle the linkage plate, so that the linkage plate drives the limit rod to slide a certain distance. After the notch of the hook and the limit rod overlap, the hook can no longer hook the limit rod, so that the spring 1 lifts the support plate, so that the support plate drives the insert 2 to apply a certain degree of impact force to the bottom of the formed workpiece, and the workpiece vibrates when impacted and loosens between the insert 1 and the sealing plate, thereby making it easier to demold. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the lower die base of the utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the lower die base of the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of the lower die base of the utility model;

[0021] Figure 5 This is an enlarged structural diagram of the support plate of the utility model;

[0022] Figure 6 This is a schematic diagram of the structure of the connection block of the utility model;

[0023] Figure 7 It is a structural schematic diagram of an insert of the utility model.

[0024] In the figure: 1. lower die base; 2. control unit; 21. demoulding cylinder; 22. insert one; 23. sealing plate; 24. trapezoidal block; 25. damper; 26. support plate; 27. through hole; 28. spring one; 29. ​​insert two; 210. sealing block; 211. spring; 212. hook; 213. torsion spring; 214. horizontal groove; 215. vertical groove; 216. rotating rod; 217. trigger rod; 218. toggle rod; 219. toggle groove; 220. scroll spring; 221. connecting block one; 222. connecting block two; 223. limit rod; 224. linkage plate; 225. spring two; 3. upper die base. DETAILED DESCRIPTION

[0025] like Figure 1-Figure 7 As shown, the utility model provides a technical solution: a multi-insert combined injection mold, including a lower mold base 1 and an upper mold base 3, a control unit 2 is arranged inside the lower mold base 1, and the control unit 2 includes: a demoulding cylinder 21, an insert 1 22, a sealing plate 23, a trapezoidal block 24, a damper 25, a support plate 26, a through hole 27, a spring 1 28, an insert 29, a sealing block 210, a spring 211, a hook 212, a torsion spring 213, a horizontal groove 214, a vertical groove 215, a rotating rod 216, a trigger rod 217, a toggle rod 218, a toggle groove 219, a volute spring 220, a connecting block 1 221, a connecting block 222, a limiting rod 223, a linkage plate 224, and a spring 225.

[0026] The bottom of the demoulding cylinder 21 is fixedly connected to the inner wall of the lower mold base 1, and the top surface of the demoulding cylinder 21 is fixedly connected to an insert 22, and the top surface of the insert 22 is fixedly connected to a sealing plate 23. When in use, the lower mold base 1 and the upper mold base 3 are first connected and installed with the injection molding production equipment respectively. When the injection molding work is performed, the upper mold base 3 is pushed downward by the injection molding equipment, so that the upper mold base 3 pushes the sealing plate 23, so that the sealing plate 23 drives the insert 22 to move downward. The block 1 22 is engaged with the insert 29 to ensure air tightness during injection molding. The side of the sealing plate 23 is fixedly connected with a trapezoidal block 24. The bottom end of the damper 25 is fixedly connected with the inner wall of the lower mold base 1. The top surface of the damper 25 is fixedly connected with a support plate 26. The bottom surface of the support plate 26 is provided with a through hole 27. The demoulding cylinder 21 passes through the through hole 27. The top surface of the support plate 26 is fixedly connected with the insert 29. After the injection molding is completed, the upper mold base 3 is raised, and then the demoulding is started. The mold cylinder 21 and the demoulding cylinder 21 will first lift the insert 1 22, but the hook 212 still hooks the limit rod 223, so that the insert 29 will not rise, and then the insert 1 22 and the insert 29 will no longer fit together, so that the external air enters the interior, so that the workpiece formed in the lower mold base 1 and the insert 1 22 and the insert 29 are no longer sealed and lose airtightness, which is more convenient for demoulding. The top surface of the insert 29 is fixedly connected with a sealing block 210, and the sealing block The inner side of 210 is hinged with a spring sheet 211, and the bottom surface of the spring sheet 211 is fixedly connected with a hook 212. The arc-shaped part at the bottom end of the hook 212 abuts against the limit rod 223, forcing the spring sheet 211 to rotate and contract the torsion spring 213. When the hook 212 exceeds the limit rod 223, the torsion spring 213 will bounce up the spring sheet 211 and clamp the hook 212 into the bottom side of the limit rod 223. The torsion spring 213 is fixedly connected between the spring sheet 211 and the inner side of the sealing block 210. The inner side of the lower die base 1 is provided with a horizontal groove 214 and a vertical groove 215, and the trapezoidal block 24 passes through the vertical groove 215 and is slidably connected. The lower die base 1 is penetrated by the rotating rod 216 and is rotatably connected to the rotating rod 216. The top of the rotating rod 216 penetrates and is fixedly connected with a trigger rod 217. When the insert 22 rises, the sealing plate 23 is driven to move upward together. When the sealing plate 23 rises to the top, the trapezoidal block 24 is driven to rise to the top along the vertical groove 215, so that the inclined surface of the trapezoidal block 24 contacts the trigger rod 217. The bottom end of the rotating rod 216 penetrates and is fixedly connected with a toggle rod 218. The bottom end of the vertical groove 215 is provided with a toggle groove 219, and the toggle rod 218 is located inside the toggle groove 219. A spring 28 is fixedly connected to the inner wall of the lower die base 1. After the hook 212 overlaps with the notch of the limit rod 223, the hook 212 can no longer hook the limit rod 223, so that the spring 28 lifts the support plate 26, so that the support plate 26 drives the insert 29 to exert a certain degree of impact force on the bottom of the formed workpiece. When the workpiece is impacted, it vibrates and loosens between the insert 22 and the sealing plate 23. The top of the spring 28 is fixedly connected to the bottom surface of the support plate 26.The surface of the rotating rod 216 is fixedly connected with a spiral spring 220, and the end of the spiral spring 220 away from the rotating rod 216 is fixedly connected to the inner wall of the lower die seat 1. The inner side of the transverse groove 214 is fixedly connected with a connecting block 1 221 and a connecting block 222, and the inner side of the connecting block 222 penetrates and is slidably connected with a limit rod 223. The upper die seat 3 pushes the sealing plate 23 to move the supporting plate 26 downward together. When the supporting plate 26 moves downward, the damper 25 will shrink and the spring 1 28 will be pressed. When the supporting plate 26 moves downward, the sealing block 210 will be driven to move downward together, so that the arc-shaped part at the bottom of the hook 212 contacts The limiting rod 223 passes through and is fixedly connected with a linkage plate 224. The inclined surface of the trapezoidal block 24 abuts against the trigger rod 217, thereby forcing the trigger rod 217 to rotate a certain distance. The trigger rod 217 drives the rotating rod 216 to rotate, and the rotating rod 216 drives the toggle rod 218 to toggle the linkage plate 224, so that the linkage plate 224 drives the limiting rod 223 to slide a certain distance. A spring 225 is fixedly connected between the linkage plate 224 and the second connecting block 222.

[0027] Based on the above embodiment, when in use, the lower mold base 1 and the upper mold base 3 are first connected and installed with the production equipment for injection molding respectively, and when the injection molding work is performed, the upper mold base 3 is pushed downward by the injection molding equipment, so that the upper mold base 3 pushes the sealing plate 23, and the sealing plate 23 drives the insert 1 22 to engage with the insert 2 29, thereby ensuring the airtightness during injection molding, and the support plate 26 moves downward together, and when the support plate 26 moves downward, the damper 25 will be contracted and the spring 1 28 will be compressed, and when the support plate 26 moves downward, the sealing block 210 will be driven to move downward together, so that the arc-shaped part at the bottom end of the hook 212 abuts against the limit rod 2 23, forcing the spring 211 to rotate and causing the torsion spring 213 to contract. When the hook 212 exceeds the limit rod 223, the torsion spring 213 will pop up the spring 211 and clamp the hook 212 into the bottom side of the limit rod 223. After the injection molding is completed, the upper mold base 3 is raised, and then the demoulding cylinder 21 is started. The demoulding cylinder 21 will first lift the insert 1 22, but the hook 212 still hooks the limit rod 223, so that the insert 29 will not rise, and then the insert 1 22 and the insert 2 29 will no longer fit together, allowing external air to enter the interior, so that the workpiece formed in the lower mold base 1 and the insert 1 22 and the insert 2 29 are no longer sealed and lose airtightness, which is more convenient for demoulding.

[0028] When the insert 22 is raised, the sealing plate 23 will be driven to move upward together. When the sealing plate 23 is raised to the top, the trapezoidal block 24 will be driven to rise to the top along the vertical groove 215, so that the inclined surface of the trapezoidal block 24 will contact the trigger rod 217, thereby forcing the trigger rod 217 to rotate a certain distance. The trigger rod 217 will drive the rotating rod 216 to rotate, and the rotating rod 216 will drive the toggle rod 218 to toggle the linkage plate 224, so that the linkage plate 224 drives the limiting rod 223 to slide a certain distance. After the notch of the hook 212 and the limiting rod 223 coincide, the hook 212 can no longer hook the limiting rod 223, so that the spring 1 28 lifts the support plate 26, so that the support plate 26 drives the insert 29 to apply a certain degree of impact force to the bottom of the formed workpiece, and the workpiece vibrates when impacted and loosens between the insert 1 22 and the sealing plate 23, thereby making it easier to demold.

[0029] 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. A multi-insert combined injection mold, comprising a lower mold base (1) and an upper mold base (3), characterized in that: A control unit (2) is provided inside the lower die base (1), and the control unit (2) comprises: A demoulding cylinder (21), wherein the bottom of the demoulding cylinder (21) is fixedly connected to the inner wall of the lower mold base (1), the top surface of the demoulding cylinder (21) is fixedly connected to an insert block (22), the top surface of the insert block (22) is fixedly connected to a sealing plate (23), and the side surface of the sealing plate (23) is fixedly connected to a trapezoidal block (24); A damper (25), the bottom end of the damper (25) is fixedly connected to the inner wall of the lower mold base (1), the top surface of the damper (25) is fixedly connected to a support plate (26), the bottom surface of the support plate (26) is provided with a through hole (27), the demoulding cylinder (21) passes through the through hole (27), the top surface of the support plate (26) is fixedly connected to an insert block 2 (29), the top surface of the insert block 2 (29) is fixedly connected to a sealing block (210), the inner side of the sealing block (210) is hinged with a spring sheet (211), the bottom surface of the spring sheet (211) is fixedly connected to a hook (212), and a torsion spring (213) is fixedly connected between the spring sheet (211) and the inner side of the sealing block (210).

2. A multi-insert combined injection mold according to claim 1, characterized in that: A transverse groove (214) and a vertical groove (215) are provided on the inner side of the lower die base (1), and the trapezoidal block (24) passes through the vertical groove (215) and is slidably connected.

3. The multi-insert combined injection mold according to claim 2, characterized in that: The lower die base (1) is penetrated by a rotating rod (216) and is rotatably connected to the rotating rod (216); a trigger rod (217) is penetrated through and fixedly connected to the top end of the rotating rod (216); and a toggle rod (218) is penetrated through and fixedly connected to the bottom end of the rotating rod (216).

4. The multi-insert combined injection mold according to claim 3, characterized in that: A toggle groove (219) is provided at the bottom end of the vertical groove (215), and the toggle rod (218) is located inside the toggle groove (219).

5. The multi-insert combined injection mold according to claim 1, characterized in that: A spring 1 (28) is fixedly connected to the inner wall of the lower die base (1), and the top end of the spring 1 (28) is fixedly connected to the bottom surface of the support plate (26).

6. The multi-insert combined injection mold according to claim 3, characterized in that: A spiral spring (220) is fixedly connected to the surface of the rotating rod (216), and one end of the spiral spring (220) away from the rotating rod (216) is fixedly connected to the inner wall of the lower mold base (1).

7. The multi-insert combined injection mold according to claim 2, characterized in that: A connecting block 1 (221) and a connecting block 2 (222) are fixedly connected to the inner side of the transverse groove (214); a limiting rod (223) passes through and is slidably connected to the inner side of the connecting block 2 (222); a linkage plate (224) passes through and is fixedly connected to the limiting rod (223); and a spring 2 (225) is fixedly connected between the linkage plate (224) and the connecting block 2 (222).

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