Automatic core-pulling mold for arc insert of rear mold

Abstract

The utility model relates to an automatic core-pulling mold for a rear mold arc insert, which comprises a front mold body and a rear mold body, and is characterized in that the front mold body comprises a front mold bottom plate and a mold cavity pressing plate fixedly connected inside the front mold bottom plate, and a plurality of sliding driving rods are fixedly connected onto the front mold bottom plate; the rear mold body comprises a rear mold base and two rear mold supporting plates which are symmetrically arranged, a demolding plate is fixedly connected between the two rear mold supporting plates, a mold cavity base is fixedly connected to the demolding plate, one side of the mold cavity base is slidably connected with a demolding block, and the other side of the mold cavity base is fixedly connected with a sliding block. The first sliding block shoveling machine is slidably connected with the demolding block, a rotary containing groove is formed in the rear mold supporting plate, a demolding rotating oil cylinder is fixedly connected into the rotary containing groove, the output end of the demolding rotating oil cylinder is rotatably connected with a demolding rotating plate, and a demolding driving plate is fixedly connected to one side of the demolding rotating plate. And the effect of stable core pulling is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of mold design, and particularly relates to an automatic core-pulling mold for a rear mold arc insert. Background Art

[0002] In the injection molding process, an injection mold is required. The injection mold can be used for the plastic in a molten state to be shaped and cooled and demolded during the injection molding process, and can process injection products of different specifications.

[0003] During the use of an injection mold, there is a processing mold dedicated to curved surface injection parts. During the processing of curved surface injection parts, demolding is achieved by means of a chain-type demolding structure inside the injection mold. After injection molding, through the internal demolding parts, a force is applied to the curved surface mold core in cooperation with the chain, so as to ensure the separation of the curved surface mold core and the injection-molded curved surface product, and then the demolding operation of the curved surface injection part can be carried out.

[0004] In the existing demolding process of curved surface injection parts, in the demolding process by means of a chain, the force on the curved surface mold core is not balanced enough, and it is easy to tear the injection-molded plastic product during demolding, which will lead to a decline in the product quality. Therefore, in the existing curved surface core-pulling mold, there is a problem that chain demolding will damage the product. Summary of the Utility Model

[0005] The purpose of the utility model is to replace chain demolding with a rotary demolding method driven by an oil cylinder to ensure the balanced force on the curved surface mold core and protect the production quality of the product.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an automatic core-pulling mold for a rear mold arc insert, which includes a front mold body and a rear mold body. The front mold body includes a front mold bottom plate and a mold cavity pressing plate fixedly connected inside the front mold bottom plate. Several sliding drive rods are fixedly connected to the front mold bottom plate, and a first slider lifter is fixedly connected to the end of the sliding drive rod. The rear mold body includes a rear mold base and two symmetrically arranged rear mold support plates. A demolding plate is fixedly connected between the two rear mold support plates. A mold cavity base is fixedly connected to the demolding plate. A demolding block is slidably connected to one side of the mold cavity base. The first slider lifter is slidably connected to the demolding block. A rotation placement groove is formed in the rear mold support plate, and a demolding rotation oil cylinder is fixedly connected inside the rotation placement groove. The output end of the demolding rotation oil cylinder is rotationally connected to a demolding rotation plate. A demolding drive plate is fixedly connected to one side of the demolding rotation plate. The demolding rotation plate is rotationally connected to the mold cavity base. A curved surface mold core is slidably connected inside the demolding drive plate.

[0007] Preferably, a slider mold core is slidably connected to one side of the first slider lifter, and an inclined surface chute matching the first slider lifter is formed on the slider mold core.

[0008] Preferably, the curved surface mold core is divided into a curved surface part and a straight part. A curved surface mold cavity is formed on the mold cavity base, and the curved surface part extends into the curved surface mold cavity and is slidably connected to the inner wall of the curved surface mold cavity.

[0009] Preferably, a slider relief groove is formed at the bottom of the first slider lifter, and a sliding opening for the straight part to extend into is formed on the slider mold core. The straight part passes through the relief groove through the sliding opening.

[0010] Preferably, a second slider lifter is slidably connected inside the demolding drive plate, and the second slider lifter is fixedly connected to the front mold bottom plate.

[0011] Preferably, an ejection plate is slidably connected between the two rear mold support plates. An ejection opening is formed on the ejection plate, and several ejection slide rods passing through the ejection opening are fixedly connected to the rear mold base.

[0012] The beneficial effects of the present utility model are as follows:

[0013] 1. By providing a demolding module that cooperates with the first slider lifter, it can independently make room for the space near the product during the demolding process, thereby relieving the state of the product being squeezed, and then enabling smooth demolding.

[0014] 2. By providing a rotary demolding device driven by an oil cylinder, it can be flipped during the demolding process. The output power of the oil cylinder is balanced, and the four axes of the rotary device that restricts the curved surface mold core can synchronously drive the curved surface mold core to move away from the product for ejection, protecting the quality of the product during the demolding process. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of an automatic core-pulling mold for a rear mold arc insert of the present utility model

[0016] Figure 2 It is a schematic structural diagram of a part of the present utility model Figure 1 ;

[0017] Figure 3 It is a schematic structural diagram of a part of the present utility model Figure 2 ;

[0018] Figure 4 It is a schematic structural diagram of the curved surface mold core of the present utility model;

[0019] Figure 5 It is a schematic structural diagram of a part of the present utility model Figure 3 .

[0020] In the figure:

[0021] 1. Front mold body; 11. Front mold bottom plate; 12. Sliding drive rod; 13. First slider lifter; 131. Slider relief groove; 14. Mold cavity pressing plate; 15. Slider mold core; 151. Inclined plane chute; 152. Slide opening; 16. Second slider lifter;

[0022] 2. Rear mold body; 21. Rear mold base; 22. Rear mold support plate; 221. Rotating placement groove; 222. Demolding rotating oil cylinder; 223. Inductive switch; 224. Demolding rotating plate; 225. Demolding drive plate; 23. Demolding plate; 24. Mold cavity base; 241. Curved mold cavity; 25. Demolding block; 26. Curved mold core; 261. Curved surface part; 262. Straight part; 27. Ejector plate; 271. Ejector opening; 272. Ejector slide rod. Specific implementation manners

[0023] In order to make the objectives, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0024] Refer to Figure 1 , a front mold body 1 and a rear mold body 2 are provided, wherein the front mold body 1 is a fixed mold and the rear mold body 2 is a moving mold. When opening the mold, the rear mold body 2 moves away from the front mold body 1 for mold opening.

[0025] Refer to Figures 1-5, the front mold body 1 includes a front mold bottom plate 11 and a cavity pressing plate 14 fixedly connected inside the front mold bottom plate 11. Several sliding drive rods 12 are fixedly connected to the front mold bottom plate 11. The sliding drive rods 12 can drive the internal structure of the rear mold body 2 to demold. A first slider lifter 13 is fixedly connected to the end of the sliding drive rod 12. A curved surface mold core 26 is slidably connected inside the demolding drive plate 225. A slider mold core 15 is slidably connected to one side of the first slider lifter 13. An inclined surface chute 151 matching the first slider lifter is provided on the slider mold core 15. Through the cooperation of the first lifter and the inclined surface chute 151, when the first lifter moves away from the rear mold body 2, it will drive the slider mold core 15 to move and vacate the extrusion positions around the product. The curved surface mold core 26 is divided into a curved surface part 261 and a straight part 262. The curved surface part 261 will form a curved surface product during injection molding, and the straight part 262 is the part that drives the curved surface part 261 to rotate. A curved surface cavity 241 is provided on the cavity base 24. The area between the surface of the curved surface part 261 and the side wall of the curved surface cavity 241 is the forming area of the injection molded part. The curved surface part 261 extends into the curved surface cavity 241 and is slidably connected to the inner wall of the curved surface cavity 241. A slider relief groove 131 is provided at the bottom of the first slider lifter 13. A sliding opening 152 for the straight part 262 to extend into is provided on the slider mold core 15. The straight part 262 can pass through the sliding opening 152 and the relief groove, so that the straight part 262 can be restricted from moving and will not shake during the movement.

[0026] Reference Figures 1-5 , the rear mold body 2 includes a rear mold base 21 and two symmetrically arranged rear mold support plates 22. A demolding plate 23 is fixedly connected between the two rear mold support plates 22. A cavity base 24 is fixedly connected to the demolding plate 23. A demolding block 25 is slidably connected to one side of the cavity base 24. The first slider lifter 13 is slidably connected to the demolding block 25. The first slider lifter 13 slides on the demolding block 25. A slider relief groove 131 is provided at the bottom of the first slider lifter 13. A sliding opening 152 for the straight part 262 to extend into is provided on the slider mold core 15. The straight part 262 can pass through the sliding opening 152 and the relief groove. When the straight part 262 is inclined, the slider relief groove 131 will not hinder the movement direction of the straight part 262.

[0027] Reference Figures 1-5, a rotation placement groove 221 is formed on the rear mold support plate 22. A demolding rotation oil cylinder 222 is fixedly connected inside the rotation placement groove 221. The demolding rotation oil cylinder 222 can drive telescopic movement to drive the curved surface mold core 26 to rotate. The output end of the demolding rotation oil cylinder 222 is rotationally connected to a demolding rotation plate 224. One side of the demolding rotation plate 224 is fixedly connected to a demolding drive plate 225. The demolding rotation oil cylinder 222 drives the demolding rotation plate 224 to rotate and drives the demolding drive plate 225 to rotate, thereby driving the curved surface mold core 26 to rotate. The curved surface portion 261 of the curved surface mold core 26 slides out of the curved surface mold cavity 241. The demolding rotation plate 224 is rotationally connected to the mold cavity base 24. A second slider lifter 16 is slidably connected inside the demolding drive plate 225. The second slider lifter 16 is fixedly connected to the front mold bottom plate 11. A top plate 27 is slidably connected between the two rear mold support plates 22. A top outlet 271 is formed on the top plate 27. A plurality of ejector slide rods 272 passing through the top outlet 271 are fixedly connected to the rear mold base 21. When the curved surface mold core 26 rotates out, the top plate 27 will move upward and drive the internal ejector pins to eject the product, realizing the lower mold. An induction switch 223 is provided on one side of the demolding rotation oil cylinder 222. The induction switch 223 can detect the telescopic position of the demolding rotation oil cylinder 222. When the demolding rotation oil cylinder 222 contracts and the demolding drive plate 225 contacts the induction switch 223, the demolding rotation oil cylinder 222 stops driving to achieve the home position effect.

[0028] The working principle of this mechanism is as follows: When performing demolding operation, the front mold body 1 is fixed, and the rear mold body 2 moves away from the front mold body 1 and opens. At this time, the first slider lifter 13 moves in the direction away from the rear mold body 2 under the movement of the rear mold body 2 away from the front mold body 1, and drives the slider mold core 15 to move, creating a space for ejecting the product. When the mold opening operation is completed, the demolding rotation oil cylinder 222 is started. The demolding rotation oil cylinder 222 pushes the demolding drive plate 225 to rotate and applies torque to the surface of the straight portion 262 of the curved surface mold core 26, so that the curved surface portion 261 of the curved surface mold core 26 slides out of the curved surface mold cavity 241 and moves away from the injection molded product. At this time, the top plate 27 is started. The top plate 27 moves upward and drives the ejector pins to apply an ejecting force to the surface of the product through the top outlet 271, and the demolding operation can be completed. After completion, the demolding rotation oil cylinder 222 is driven in the reverse direction to reset the position of the demolding drive plate 225. When approaching the induction switch 223, the demolding rotation oil cylinder 222 will automatically stop telescoping, and the reset operation can be completed, thereby realizing the process of accurately demolding the curved surface product.

[0029] The above embodiments are used to further illustrate the present invention, but do not limit the present invention to these specific embodiments. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be understood to be within the protection scope of the present invention.

Claims

1. An automatic core-pulling mold for a rear mold arc insert, comprising a front mold body (1) and a rear mold body (2), characterized in that: The front mold body (1) includes a front mold bottom plate (11) and a cavity pressing plate (14) fixedly connected inside the front mold bottom plate (11). Several sliding drive rods (12) are fixedly connected to the front mold bottom plate (11). A first slider lifter (13) is fixedly connected to the end of the sliding drive rod (12). The rear mold body (2) includes a rear mold base (21) and two symmetrically arranged rear mold support plates (22). A stripper plate (23) is fixedly connected between the two rear mold support plates (22). A cavity base (24) is fixedly connected to the stripper plate (23). A stripping block (25) is slidably connected to one side of the cavity base (24). The first slider lifter (13) is slidably connected to the stripping block (25). A rotation placement groove (221) is formed in the rear mold support plate (22). A stripping rotation oil cylinder (222) is fixedly connected inside the rotation placement groove (221). The output end of the stripping rotation oil cylinder (222) is rotatably connected to a stripping rotation plate (224). A stripping drive plate (225) is fixedly connected to one side of the stripping rotation plate (224). The stripping rotation plate (224) is rotatably connected to the cavity base (24). A curved surface mold core (26) is slidably connected inside the stripping drive plate (225).

2. The automatic core-pulling mold for the rear mold arc insert according to claim 1, wherein: A slider mold core (15) is slidably connected to one side of the first slider lifter (13). An inclined surface chute (151) matching the first slider lifter (13) is formed in the slider mold core (15).

3. The automatic core-pulling mold for the rear mold arc insert according to claim 2, wherein: The curved surface mold core (26) is divided into a curved surface part (261) and a straight part (262). A curved surface cavity (241) is formed in the cavity base (24). The curved surface part (261) extends into the curved surface cavity (241) and is slidably connected to the inner wall of the curved surface cavity (241).

4. An automatic core-pulling mold for a rear mold arc insert according to claim 3, characterized in that: A slider relief groove (131) is formed at the bottom of the first slider lifter (13). A sliding port (152) for the straight part (262) to extend into is formed in the slider mold core (15). The straight part (262) passes through the sliding port (152) and the relief groove.

5. The automatic core-pulling mold for the rear mold circular arc insert according to claim 1, wherein: A second slider lifter (16) is slidably connected inside the stripping drive plate (225). The second slider lifter (16) is fixedly connected to the front mold bottom plate (11).

6. The automatic core-pulling mold for the rear mold arc insert according to claim 1, wherein: An ejector plate (27) is slidably connected between the two rear mold support plates (22). An ejection port (271) is formed in the ejector plate (27). Several ejection slide rods (272) passing through the ejection port (271) are fixedly connected to the rear mold base (21).

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