Cooling demolding mechanism and injection mold

Abstract

The invention relates to the technical field of injection molds, and discloses a cooling demolding mechanism and an injection mold. The mold comprises a mold frame, an injection mold, a positioning and fixing mechanism, a first mold, a second mold, a cooling mechanism and a demolding mechanism, the cooling mechanism is mounted in the mold frame, and the demolding mechanism is mounted in the injection mold; by arranging the demolding mechanism, a rotating shaft rotates to drive a cam to rotate, so that a sliding frame can be pushed to slide in a guide rail, a pushing part is driven to extend into an injection molding cavity, and an injection molding part in the injection molding cavity can be pushed to be separated from the inner wall of the injection molding cavity and is prevented from being damaged during demolding; and the electric push rod is arranged to control the ejector rod to move in the mounting groove, and the electric push rod extends to enable the ejector rod to protrude out of the mounting groove, so that an injection molding part in the injection molding cavity can be pushed out, the injection molding part is demolded, the situation that a product is damaged during demolding is reduced, and the loss of the product is greatly reduced.

Description

Technical Field

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

[0002] Injection molding is a method of producing industrial products. Products usually use rubber injection molding and plastic injection molding. Injection molding can also be divided into injection molding and die casting. Injection molding machine (referred to as injection machine or injection molding machine) is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting materials. Injection molding is achieved through injection molding machines and molds. After the production of electronic products is completed, they need to be packaged and protected with electronic product packaging boxes. Electronic product packaging boxes made of plastic usually have better protection effects. Plastic electronic product packaging boxes need to be produced using injection molds.

[0003] Electronic product packaging boxes need to be demoulded after injection molding. Since electronic product packaging boxes are usually thin, traditional demoulding mechanisms can easily cause the electronic product packaging boxes to be torn and damaged when ejecting the electronic product packaging boxes, making them unusable, greatly increasing product losses and affecting production efficiency. Summary of the invention

[0004] The object of the present invention is to provide a cooling demoulding mechanism and an injection mold to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] An injection mold, comprising:

[0007] Formwork;

[0008] A positioning and fixing mechanism, wherein the positioning and fixing mechanism is installed on the top of the mold frame;

[0009] A first mold, wherein the first mold is clamped and fixed to the top of the mold frame by the positioning and fixing mechanism, a groove is provided on the top of the first mold, and an injection hole is provided inside the groove;

[0010] The second mold is fixedly installed inside the mold frame, an injection cavity is opened inside the second mold, and the second mold fits with the first mold.

[0011] Optionally, the positioning and fixing mechanism includes a limit column, a first spring and a limit block, the limit column is fixedly installed on the top of the mold frame, the limit block is movably connected to the inside of the limit column through the first spring, a limit groove matching the limit column is opened inside the first mold, and the limit block is located at the top of the first mold.

[0012] Optionally, a handle is fixedly mounted on the top of the first mold, and the handle is located on one side of the groove.

[0013] A cooling and demoulding mechanism comprises the injection mold according to any one of the above claims, a cooling mechanism and a demoulding mechanism, wherein the cooling mechanism is installed inside the mold frame, and the demoulding mechanism is installed inside the injection mold.

[0014] Optionally, the demolding mechanism includes a plurality of rotating shafts, a plurality of cams, a plurality of guide rails, a plurality of sliding frames, a plurality of pushing members, a plurality of third springs, an electric push rod and a ejecting rod, the rotating shaft is rotatably connected to the inside of the mold frame, the cam is fixedly mounted on the side wall of the rotating shaft, the guide rail is fixedly mounted on the side wall of the second mold, the sliding frame is slidably connected to the inside of the guide rail through the third spring, the pushing member is mounted on the inside of the sliding frame, an active groove connected to the injection cavity is opened inside the second mold, the pushing member is located inside the active groove, the electric push rod is fixedly mounted on the inner wall of the mold frame, an installation groove connected to the injection cavity is opened inside the second mold, the ejecting rod is mounted on the output end of the electric push rod, and the ejecting rod is located inside the installation groove.

[0015] Optionally, a plurality of servo motors are fixedly mounted on the side walls of the mold frame, and the rotating shaft is fixedly mounted on the output end of the servo motor.

[0016] Optionally, a second spring is fixedly mounted on the inner wall of the sliding frame, the pushing member is fixedly mounted on one end of the second spring, and the pushing member is slidably connected to the inside of the sliding frame via the second spring.

[0017] Optionally, a movable cavity is opened on the inner wall of the injection cavity, a fourth spring is fixedly installed on the inner wall of the movable cavity, a movable frame is fixedly installed on one end of the fourth spring, and the movable frame corresponds to the pushing member.

[0018] Optionally, a guide rod is fixedly installed inside the output end of the electric push rod, the ejecting rod is slidably connected to the side wall of the guide rod, a tension spring is fixedly installed between the bottom of the ejecting rod and the inside of the output end, a vibration motor is fixedly installed inside the ejecting rod, and a buffer pad is fixedly installed on the top of the installation groove.

[0019] Optionally, the cooling mechanism includes a heat conducting plate and a ventilation fan, a plurality of ventilation grilles are provided inside the mold frame, the ventilation fan is fixedly mounted on one side of the ventilation grilles, the heat conducting plate is fixedly mounted inside the second mold, and one end of the heat conducting plate is located inside the mold frame.

[0020] The present invention has at least the following beneficial effects:

[0021] (1) This scheme sets up a demoulding mechanism, and the rotation of the rotating shaft drives the rotation of the cam, so that the sliding frame can be pushed to slide inside the guide rail, and the pushing member can be driven to extend into the injection cavity, so that the injection molded part inside the injection cavity can be pushed away from the inner wall of the injection cavity, thereby avoiding damage to the injection molded part during demoulding. By setting up an electric push rod, the push rod can be controlled to move inside the installation groove. By extending the electric push rod, the push rod can be protruded from the installation groove, so that the injection molded part inside the injection cavity can be pushed out, so that the injection molded part is demoulded, thereby reducing the damage of the product during demoulding and greatly reducing the loss of the product.

[0022] (2) This solution sets a vibration motor, and the operation of the vibration motor can make the ejector rod move up and down at the output end of the electric push rod, so as to gradually push the injection molded part inside the injection cavity away from the inner wall of the injection cavity, avoiding direct ejection of the material and causing damage to the injection molded part;

[0023] (3) This solution sets a positioning and fixing mechanism, sets a limiting column on the top of the mold frame and sets a limiting groove inside the first mold, so that the first mold can play a positioning role when it is installed on the top of the mold frame. The limiting block can be supported by setting a first spring. When the first mold is installed on the top of the mold frame, the limiting block will be located on the top of the first mold, which plays a role in fixing the first mold, so that the first mold can be better fixed on the top of the mold frame;

[0024] (4) This solution provides a cooling mechanism, and by providing a heat-conducting plate, the heat inside the second mold can be introduced into the mold frame, and the heat can be sent out of the mold frame by a ventilation fan, so that the injection molded part inside the second mold can be cooled faster and the cooling effect can be better. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 It is a schematic diagram of the structure of the present invention;

[0027] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the present invention;

[0028] Figure 3 It is a schematic diagram of the cross-sectional structure of the present invention;

[0029] Figure 4 For the present invention Figure 3 The enlarged structural diagram at A in the middle;

[0030] Figure 5 For the present invention Figure 3 The enlarged structural diagram at B in the middle;

[0031] Figure 6 For the present invention Figure 3 Enlarged structural diagram at point C in the middle.

[0032] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0033] 1. Mold frame; 2. Ventilation grille; 201. Heat conducting plate; 202. Ventilation fan; 3. First mold; 301. Groove; 302. Injection hole; 303. Handle; 304. Second mold; 305. Injection cavity; 4. Limiting column; 401. Limiting groove; 402. First spring; 403. Limiting block; 5. Servo motor; 501. Electric push rod; 502. Rotating shaft; 503. Cam; 504. Guide rail; 505. Sliding frame; 506. Pushing member; 507. Second spring; 508. Third spring; 509. Movable groove; 510. Movable cavity; 511. Fourth spring; 512. Movable frame; 513. Mounting groove; 514. Ejecting rod; 515. Vibration motor; 516. Buffer pad; 517. Guide rod; 518. Tension spring. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] See also Figure 1-Figure 6 The present invention provides an injection mold, comprising:

[0036] The mold frame 1 serves as the basic frame of the entire mold. The mold frame 1 provides stable support and ensures the stability and durability of the mold under high pressure environment.

[0037] The positioning and fixing mechanism is installed on the top of the mold frame 1, and is used to accurately position and fix the first mold 3. It includes components such as a limit column 4, a first spring 402 and a limit block 403. The limit column 4 is fixed on the mold frame 1, and the limit block 403 is connected to the limit column 4 through the first spring 402, and can move up and down inside the limit column 4. The interior of the first mold 3 is provided with a limit groove 401 that matches the limit column 4. When the first mold 3 is installed on the mold frame 1, the limit block 403 will pop out due to the force of the spring, thereby firmly fixing the first mold 3 on the mold frame 1. In addition, a handle 303 is also provided on the top of the first mold 3 to facilitate the operator to manually install or remove the mold.

[0038] The first mold 3 is installed on the top of the mold frame 1, and a groove 301 is provided on the top of the mold frame 1 to accommodate the material to be injected. An injection hole 302 is opened inside the groove 301 to allow the molten plastic to flow into the mold to form the product shape. The first mold 3 must be set to ensure precise matching with the second mold 304 to ensure the quality of the finished product.

[0039] The second mold 304 is fixedly mounted inside the mold frame 1, and together with the first mold 3, forms a complete mold cavity. An injection cavity 305 is provided inside the second mold 304, which matches the groove 301 of the first mold 3 to form the shape of the final product. In order to achieve efficient cooling and rapid demolding, the second mold 304 also integrates a cooling mechanism and a demolding mechanism. The first mold 3 can be conveniently taken by providing a handle 303, and a limiting groove 401 is provided inside the first mold 3 by providing a limiting column 4 at the top of the mold frame 1, so that the first mold 3 can play a positioning role when it is installed on the top of the mold frame 1. The limiting block 403 can be supported by providing a first spring 402. When the first mold 3 is installed on the top of the mold frame 1, the limiting block 403 will be located on the top of the first mold 3, which plays a role in fixing the first mold 3, so that the first mold 3 can be better fixed on the top of the mold frame 1.

[0040] In some embodiments, see Figure 1 , Figure 3 , a cooling demoulding mechanism is provided, which is installed inside the mold frame 1, aiming to quickly reduce the mold temperature, accelerate the plastic curing process, and shorten the production cycle. The cooling system usually adopts a circulating water cooling method, and ensures uniform cooling of the mold by precisely controlling the water flow speed and temperature, avoiding product deformation or quality problems caused by local overheating.

[0041] In order to ensure that the product can be smoothly removed from the mold, a complex demoulding system is designed, which mainly includes a rotating shaft 502, a cam 503, a guide rail 504, a sliding frame 505, a pusher 506, a third spring 508, an electric push rod 501 and a ejector rod 514.

[0042] Here’s how it works:

[0043] The rotating shaft 502 is installed inside the mold frame 1 and is used to drive the cam 503 to rotate. The cam 503 is fixed to the side of the rotating shaft 502. As the rotating shaft 502 rotates, the cam 503 can generate periodic thrust. The guide rail 504 is fixed to the side wall of the second mold 304 to provide guidance for the sliding frame 505. The sliding frame 505 is connected to the guide rail 504 through the third spring 508 and can slide inside the guide rail 504. The pusher 506 is installed inside the sliding frame 505 and is located in the movable groove 509 of the second mold 304. When the sliding frame 505 is subjected to the thrust from the cam 503, the pusher 506 will move toward the center of the mold to help the product detach from the mold surface. The electric push rod 501 is fixed to the inner wall of the mold frame 1, and its output end is connected to the ejector rod 514.

[0044] The ejector rod 514 is installed at the output end of the electric push rod 501 and is located in the installation groove 513 of the second mold 304. When demoulding is required, the electric push rod 501 extends, pushing the ejector rod 514 to move upward, directly acting on the bottom of the product, and assisting the product to be separated from the mold. The cam 503 corresponds to the sliding frame 505. The rotation of the rotating shaft 502 can drive the cam 503 to rotate, thereby pushing the sliding frame 505 to slide inside the guide rail 504. The third spring 508 can be provided to support the sliding frame 505, so that the cam 503 rotates to one side so that the sliding frame 505 can be reset. The sliding of the sliding frame 505 can drive the pushing member 506 to extend into the injection cavity 305, thereby pushing the injection molded part inside the injection cavity 305 to separate from the inner wall of the injection cavity 305, thereby avoiding damage to the injection molded part during demolding. The electric push rod 501 can be provided to control the ejector rod 514 to move inside the mounting groove 513. The ejector rod 514 can be extended to protrude from the mounting groove 513, thereby pushing the injection molded part inside the injection cavity 305 out, allowing the injection molded part to be demolded, thereby reducing damage to the product during demolding and greatly reducing product loss.

[0045] In some embodiments, see Figure 1 , Figure 3 A plurality of servo motors 5 are fixedly mounted on the side wall of the mold frame 1 , and a rotating shaft 502 is fixedly mounted on the output end of the servo motor 5 . The rotation of the rotating shaft 502 can be controlled by setting the servo motor 5 .

[0046] In some embodiments, see Figure 4 , Figure 5, a second spring 507 is fixedly installed on the inner wall of the sliding frame 505, and a pushing member 506 is fixedly installed on one end of the second spring 507. The pushing member 506 is slidably connected to the inside of the sliding frame 505 through the second spring 507. An active cavity 510 is provided on the inner wall of the injection cavity 305. A fourth spring 511 is fixedly installed on the inner wall of the active cavity 510. A movable frame 512 is fixedly installed on one end of the fourth spring 511. The movable frame 512 corresponds to the pushing member 506. By providing the second spring 507, the pushing member 506 can be movably connected to the sliding frame 505. When the sliding frame 505 moves to one side, the pushing member 506 can push the injection molded part inside the injection cavity 305. By providing the second spring 507, a buffering effect can be played, thereby slowly pushing the injection molded part away from the inner wall of the injection cavity 305. By providing the movable frame 512, the movable frame 512 can move along with the injection molded part when it is pushed and deformed by the pushing member 506, thereby preventing the injection molded part from being deformed due to excessive force.

[0047] In some embodiments, see Figure 3 , Figure 6 , a guide rod 517 is fixedly installed inside the output end of the electric push rod 501, and the ejecting rod 514 is slidably connected to the side wall of the guide rod 517, a tension spring 518 is fixedly installed between the bottom of the ejecting rod 514 and the inside of the output end, a vibration motor 515 is fixedly installed inside the ejecting rod 514, and a buffer pad 516 is fixedly installed on the top of the mounting groove 513. By setting the guide rod 517, the movement of the ejecting rod 514 in the opposite direction can be limited, and by setting the tension spring 518, the ejecting rod 514 can be pulled downward, so that the ejecting rod 514 is located at the top of the mounting groove 513, so that the top of the ejecting rod 514 is flush with the inner wall of the injection cavity 305, and the support buffer pad 516 can play a buffering and supporting effect, and by setting the vibration motor 515, the ejecting rod 514 can be made to move up and down at the output end of the electric push rod 501 through the operation of the vibration motor 515, so that the injection molded part in the injection cavity 305 can be gradually pushed away from the inner wall of the injection cavity 305, avoiding direct ejection and causing damage to the injection molded part.

[0048] In some embodiments, see Figure 1 , Figure 3 The cooling mechanism includes a heat conducting plate 201 and a ventilation fan 202. A plurality of ventilation grilles 2 are provided inside the mold frame 1. The ventilation fan 202 is fixedly installed on one side of the ventilation grille 2. The heat conducting plate 201 is fixedly installed inside the second mold 304. One end of the heat conducting plate 201 is located inside the mold frame 1. By providing the ventilation grille 2 inside the mold frame 1, the air circulation effect inside the mold frame 1 can be better. By providing the ventilation fan 202, the air circulation can be further enhanced. By providing the heat conducting plate 201, the heat inside the second mold 304 can be introduced into the mold frame 1, and the heat is sent out of the mold frame 1 through the ventilation fan 202, so that the injection molded part inside the second mold 304 can be cooled faster and the cooling effect is better.

[0049] The working process and principle of the present invention are as follows: when in use, the first mold 3 is taken up by the handle 303, and the first mold 3 is installed on the top of the mold frame 1. The limiting column 4 on the top of the mold frame 1 and the limiting groove 401 inside the first mold 3 can play a positioning role when the first mold 3 is installed on the top of the mold frame 1. When the first mold 3 is installed on the top of the mold frame 1, the limiting block 403 will be located on the top of the first mold 3, which plays a role in fixing the first mold 3, so that the first mold 3 can be better fixed on the top of the mold frame 1. Then, the injection plastic is injected into the groove 301, and the injection plastic flows into the injection cavity 305 through the injection hole 302. The heat inside the second mold 304 can be introduced into the mold frame 1 through the heat conducting plate 201, and the heat is sent out of the mold frame 1 through the ventilation fan 202, so that the injection molded part inside the second mold 304 can be cooled faster. After the cooling of the injection molded part is completed, the servo motor 5 is driven to rotate the rotating shaft 502, and the rotating shaft The rotation of 502 can drive the cam 503 to rotate, thereby pushing the sliding frame 505 to slide inside the guide rail 504. The sliding frame 505 can be supported by setting the third spring 508, so that the cam 503 rotates to one side so that the sliding frame 505 can be reset. The sliding of the sliding frame 505 can drive the pushing member 506 to extend into the injection cavity 305, thereby pushing the injection molded part inside the injection cavity 305 to separate from the inner wall of the injection cavity 305, avoiding damage to the injection molded part during demolding. The operation of the vibration motor 515 can make the ejector rod 514 move up and down at the output end of the electric push rod 501, thereby gradually pushing the injection molded part inside the injection cavity 305 to separate from the inner wall of the injection cavity 305, avoiding direct ejection and causing damage to the injection molded part. Afterwards, the electric push rod 501 is extended to make the ejector rod 514 protrude from the mounting groove 513, thereby pushing the injection molded part inside the injection cavity 305 out, so that the injection molded part is demolded.

[0050] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An injection mold, characterized in that: include: Mould frame (1); A positioning and fixing mechanism, the positioning and fixing mechanism being installed on the top of the mold frame (1); A first mold (3), the first mold (3) being fixed to the top of the mold frame (1) by means of the positioning and fixing mechanism, a groove (301) being provided on the top of the first mold (3), and an injection hole (302) being provided inside the groove (301); The second mold (304) is fixedly installed inside the mold frame (1), an injection cavity (305) is provided inside the second mold (304), and the second mold (304) is matched with the first mold (3).

2. An injection mold according to claim 1, characterized in that: The positioning and fixing mechanism comprises a limiting column (4), a first spring (402) and a limiting block (403); the limiting column (4) is fixedly mounted on the top of the mold frame (1); the limiting block (403) is movably connected to the inside of the limiting column (4) through the first spring (402); a limiting groove (401) matching the limiting column (4) is provided inside the first mold (3); and the limiting block (403) is located on the top of the first mold (3).

3. An injection mold according to claim 1, characterized in that: A handle (303) is fixedly mounted on the top of the first mold (3), and the handle (303) is located on one side of the groove (301).

4. A cooling demoulding mechanism, characterized in that: It comprises the injection mold, cooling mechanism and demoulding mechanism as claimed in any one of the above claims, wherein the cooling mechanism is installed inside the mold frame (1), and the demoulding mechanism is installed inside the injection mold.

5. A cooling and demoulding mechanism according to claim 4, characterized in that: The demoulding mechanism comprises a plurality of rotating shafts (502), a plurality of cams (503), a plurality of guide rails (504), a plurality of sliding frames (505), a plurality of pushing members (506), a plurality of third springs (508), an electric push rod (501) and a ejector rod (514); the rotating shaft (502) is rotatably connected to the inside of the mold frame (1); the cam (503) is fixedly mounted on the side wall of the rotating shaft (502); the guide rail (504) is fixedly mounted on the side wall of the second mold (304); the sliding frame (505) is slidably connected to the guide rail (506) through the third spring (508); 4), the pushing member (506) is installed inside the sliding frame (505), the second mold (304) is provided with a movable groove (509) connected to the injection cavity (305), the pushing member (506) is located inside the movable groove (509), the electric push rod (501) is fixedly installed on the inner wall of the mold frame (1), the second mold (304) is provided with a mounting groove (513) connected to the injection cavity (305), the ejecting rod (514) is installed at the output end of the electric push rod (501), and the ejecting rod (514) is located inside the mounting groove (513).

6. A cooling and demoulding mechanism according to claim 5, characterized in that: A plurality of servo motors (5) are fixedly mounted on the side wall of the mold frame (1), and the rotating shaft (502) is fixedly mounted on the output end of the servo motor (5).

7. A cooling and demoulding mechanism according to claim 5, characterized in that: A second spring (507) is fixedly mounted on the inner wall of the sliding frame (505), the pushing member (506) is fixedly mounted on one end of the second spring (507), and the pushing member (506) is slidably connected to the inside of the sliding frame (505) via the second spring (507).

8. A cooling and demoulding mechanism according to claim 5, characterized in that: The inner wall of the injection cavity (305) is provided with a movable cavity (510), the inner wall of the movable cavity (510) is fixedly mounted with a fourth spring (511), one end of the fourth spring (511) is fixedly mounted with a movable frame (512), and the movable frame (512) corresponds to the pushing member (506).

9. A cooling and demoulding mechanism according to claim 5, characterized in that: A guide rod (517) is fixedly installed inside the output end of the electric push rod (501), the ejector rod (514) is slidably connected to the side wall of the guide rod (517), a tension spring (518) is fixedly installed between the bottom of the ejector rod (514) and the inside of the output end, a vibration motor (515) is fixedly installed inside the ejector rod (514), and a buffer pad (516) is fixedly installed on the top of the installation groove (513).

10. A cooling and demoulding mechanism according to claim 4, characterized in that: The cooling mechanism comprises a heat conducting plate (201) and a ventilation fan (202); a plurality of ventilation grilles (2) are provided inside the mold frame (1); the ventilation fan (202) is fixedly mounted on one side of the ventilation grilles (2); the heat conducting plate (201) is fixedly mounted inside the second mold (304); and one end of the heat conducting plate (201) is located inside the mold frame (1).

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