Demolding mechanism of injection molding machine

Abstract

The utility model relates to the technical field of injection molds, in particular to an injection molding machine demolding mechanism which comprises a first mold, a second mold and a supporting seat which are transversely arranged from right to left in sequence, the left side of the supporting seat is fixedly connected with an electric telescopic rod, and the right side of the electric telescopic rod is connected with the left side of the second mold. An injection molding pipe is fixedly connected to the right side of the first mold, a demolding mechanism capable of separating an object from the second mold is arranged on the left side of the second mold, and during demolding, the second mold moves leftwards, so that a rotating block rotates, a cylindrical block is separated from a first vent hole, and the first vent hole, a second vent hole and a third vent hole communicate; in this way, during demolding, gas can be introduced into the position, attached to the second mold, of the object, the air pressure on the left side and the air pressure on the right side of the object are the same, and therefore the situation of demolding negative pressure is avoided, the object cannot be damaged during separation, and the demolding effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, in particular to a demoulding mechanism of an injection molding machine. Background Art

[0002] An injection molding machine, also known as an injection molding press or an injection machine, is the main molding equipment for making various shaped plastic products from thermoplastic or thermosetting plastics using plastic molding dies. The injection molding machine can heat the plastic, apply high pressure to the molten plastic, and inject it to fill the mold cavity; many products made in beauty salons are formed by injecting molten plastic. Generally, after the injection molding is completed by an injection molding machine, a demoulding mechanism is required to push the injection molded product out of the mold cavity to obtain the finished product.

[0003] In the existing device, after injection molding and cooling, since the raw material cools from a liquid to a solid, the mating surface between the object and the mold fits tightly. In the existing technology, a pushing component is set to push the object. Since the object fits with the mold and there is almost no gas between the two, when pushing the object, a certain atmospheric pressure needs to be overcome. The object has just cooled and its hardness is still poor. At this time, if the object is strongly pushed, the object is likely to be deformed, and in serious cases, the object may be damaged, thereby reducing the demoulding effect. Summary of the Utility Model

[0004] In view of this, the purpose of the present utility model is to provide a demoulding mechanism of an injection molding machine to solve the problem that in the existing device, after injection molding and cooling, since the raw material cools from a liquid to a solid, the mating surface between the object and the mold fits tightly. In the existing technology, a pushing component is set to push the object. Since the object fits with the mold and there is almost no gas between the two, when pushing the object, a certain atmospheric pressure needs to be overcome. The object has just cooled and its hardness is still poor. At this time, if the object is strongly pushed, the object is likely to be deformed, and in serious cases, the object may be damaged, thereby reducing the demoulding effect.

[0005] Based on the above purpose, the present utility model provides a demoulding mechanism of an injection molding machine, including a first mold, a second mold and a support base, which are arranged horizontally from right to left in sequence. A telescopic electric rod is fixedly connected to the left side of the support base, and the right side of the telescopic electric rod is connected to the left side of the second mold. An injection pipe is fixedly connected to the right side of the first mold. A demoulding mechanism capable of separating the object from the second mold is provided on the left side of the second mold, and a pushing component is provided on the left side of the second mold;

[0006] The demolding mechanism includes a rotating rod rotatably connected to the left side of the second mold. A circular cavity is formed inside the second mold. A rotating block is fixedly arranged on the right side of the rotating rod. The outer side of the rotating block matches the inner wall of the circular cavity. A circular block is fixedly connected to the right side of the inner wall of the circular cavity. The left side of the circular block is in contact with the right side of the rotating block. A plurality of grooves are evenly formed on the right side of the rotating block. A first spring is fixedly connected inside the groove. The right side of the first spring is fixedly connected with a cylindrical block matching the groove. A plurality of first ventilation holes matching the cylindrical block are evenly formed inside the circular block. A plurality of second ventilation holes are evenly formed inside the rotating block. A plurality of third ventilation holes are evenly formed at the position of the circular cavity on the left side of the second mold. A rotating assembly is arranged on the left side of the rotating rod.

[0007] Preferably, the rotating assembly includes a threaded block fixedly connected inside the support base. A spiral groove is arranged on the left side of the rotating rod. The spiral groove fits the inner wall of the threaded block.

[0008] Preferably, the right side of the cylindrical block is arc-shaped.

[0009] Preferably, the pushing assembly includes a pushing block movably connected inside the second mold. A long rod is fixedly connected to the left side of the pushing block. A stop block is fixedly connected to the left side of the long rod. A second spring is sleeved on the left side of the rod wall of the long rod.

[0010] Preferably, a plurality of first limit blocks are evenly fixedly connected to the right side of the rod wall of the rotating rod. A plurality of second limit blocks are evenly fixedly connected to the left side wall of the circular cavity.

[0011] The beneficial effects of the present invention are as follows:

[0012] During demolding, when the second mold moves to the left, the rotating block rotates, and the cylindrical block disengages from the first ventilation hole, so that the first ventilation hole, the second ventilation hole and the third ventilation hole are communicated. In this way, when demolding, gas can be introduced into the position where the object is in contact with the second mold, so that the air pressures on the left and right sides of the object are the same, thereby avoiding the situation of demolding negative pressure, so that the object will not be damaged during detachment, and at the same time, demolding is more convenient, improving the demolding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only those of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0014] Figure 1 It is a schematic three-dimensional structure diagram of an embodiment of the present invention;

[0015] Figure 2 It is a schematic diagram of the first sectional structure of an embodiment of the present utility model;

[0016] Figure 3 It is a schematic diagram of the second sectional structure of an embodiment of the present utility model;

[0017] Figure 4 It is an embodiment of the present utility model Figure 3 The enlarged structure schematic diagram at position A in;

[0018] Figure 5 It is a schematic diagram of the rotating block structure of an embodiment of the present utility model.

[0019] The markings in the figure are:

[0020] 1. First mold; 2. Support base; 3. Electric telescopic rod; 4. Second mold; 5. Threaded block; 6. Spiral groove; 7. Pushing block; 8. Long rod; 9. Second spring; 10. Circular cavity; 11. Circular block; 12. First ventilation hole; 13. Third ventilation hole; 14. Second limit block; 15. First limit block; 16. Cylindrical block; 17. First spring; 18. Groove; 19. Second ventilation hole; 20. Rotating rod; 21. Rotating block; 22. Injection pipe. Specific implementation manner

[0021] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in conjunction with specific embodiments.

[0022] As Figures 1-5 shown, the present utility model provides a demoulding mechanism for an injection molding machine, including a first mold 1, a second mold 4 and a support base 2, and the three are arranged horizontally from right to left in sequence. A left side of the support base 2 is fixedly connected with an electric telescopic rod 3. The electric telescopic rod 3 is a driving device and can perform telescopic work. A right side of the electric telescopic rod 3 is connected to a left side of the second mold 4. A right side of the first mold 1 is fixedly connected with an injection pipe 22. The injection pipe 22 is used to inject raw materials into the first mold 1 and the second mold 4, and the raw materials are taken out after cooling. A cooling device is provided inside the first mold 1, which is prior art and not shown in the figure. A demoulding mechanism capable of separating an object from the second mold 4 is provided on a left side of the second mold 4, and a material pushing assembly is provided on the left side of the second mold 4;

[0023] The demolding mechanism includes a rotating rod 20 rotatably connected to the left side of the second mold 4. A circular cavity 10 is formed inside the second mold 4. A rotating block 21 is fixedly arranged on the right side of the rotating rod 20. The rotation of the rotating rod 20 can drive the rotation of the rotating block 21. The outer side of the rotating block 21 matches the inner wall of the circular cavity 10. The right side of the inner wall of the circular cavity 10 is fixedly connected with a circular block 11. The left side of the circular block 11 is in contact with the right side of the rotating block 21. A plurality of grooves 18 are evenly formed on the right side of the rotating block 21. A first spring 17 is fixedly connected inside the groove 18. The right side of the first spring 17 is fixedly connected with a cylindrical block 16 matching the groove 18. The first spring 17 has a certain supporting force on the cylindrical block 16. A plurality of first ventilation holes 12 matching the cylindrical block 16 are evenly formed inside the circular block 11. A plurality of second ventilation holes 19 are evenly formed inside the rotating block 21. A plurality of third ventilation holes 13 are evenly formed at the position of the circular cavity 10 on the left side of the second mold 4. The rotation of the rotating rod 20 causes the rotation of the rotating block 21, and then the cylindrical block 16 is separated from the first ventilation hole 12. The rotation of the rotating block 21 aligns the first ventilation hole 12 with the second ventilation hole 19. When the first ventilation hole 12, the second ventilation hole 19, and the third ventilation hole 13 are communicated, air can be introduced into the inside of the second mold 4. A rotating assembly is arranged on the left side of the rotating rod 20. The rotating assembly includes a threaded block 5 fixedly connected inside the support base 2. A spiral groove 6 is arranged on the left side of the rotating rod 20. When the electric telescopic rod 3 drives the second mold 4 to move to the left, the rotating rod 20 moves to the left. Under the action of the threaded block 5, the rotating rod 20 rotates. The spiral groove 6 coincides with the inner wall of the threaded block 5. Here, it should be noted that the angle of rotation of the rotating rod 20 caused by the movement of the spiral groove 6 is 15 degrees. The right side of the cylindrical block 16 is arc-shaped. When the rotating block 21 drives the cylindrical block 16 to rotate, the cylindrical block 16 can be more easily retracted into the groove 18;

[0024] During demolding, when the second mold 4 moves to the left, the first ventilation hole 12, the second ventilation hole 19, and the third ventilation hole 13 are communicated. In this way, during demolding, air can be introduced into the position where the object is in contact with the second mold 4, thus avoiding the occurrence of demolding negative pressure and improving the demolding effect;

[0025] The first mold 1 and the second mold 4 are fitted together. At this time, raw materials are injected into the interior of the first mold 1 through the injection pipe 22. After cooling, the electric telescopic rod 3 drives the second mold 4 to move to the left. When the second mold 4 moves to the left, it drives the rotating rod 20 to move. Under the action of the spiral groove 6 and the threaded block 5, the rotating rod 20 makes a moving rotation. The rotation of the rotating rod 20 drives the rotating block 21 to rotate. The rotation of the rotating block 21 makes the cylindrical block 16 rotate relative to the circular block 11, causing the cylindrical block 16 to disengage from the first ventilation hole 12 opened in the circular block 11. The rotation of the rotating block 21 aligns the second ventilation hole 19 with the first ventilation hole 12. At this time, through the third ventilation hole 13, gas can be introduced between the object and the second mold 4, thereby effectively avoiding the occurrence of negative pressure during demolding, improving the demolding effect, and ensuring the integrity of the object at the same time.

[0026] As Figures 1-4 shown, the pushing component includes a pushing block 7 interactively connected inside the second mold 4. A long rod 8 is fixedly connected to the left side of the pushing block 7. A stop block is fixedly connected to the left side of the long rod 8. A second spring 9 is sleeved on the left side wall of the long rod 8. When the second mold 4 moves to the left, it drives the long rod 8 to move to the right. The long rod 8 contacts the support seat 2, causing the pushing block 7 to move to the right relative to the second mold 4, thereby realizing the function of pushing the material and improving the material removal effect.

[0027] As Figures 1-4 shown, a first limiting block 15 is evenly fixedly connected to the right side wall of the rotating rod 20, and a second limiting block 14 is evenly fixedly connected to the left side wall of the circular cavity 10. By providing the first limiting block 15 and the second limiting block 14, the rotation of the rotating rod 20 can be limited, and it will not rotate randomly under the action of inertia, facilitating the reset of the rotating rod 20.

[0028] Working principle: During operation, the first mold 1 and the second mold 4 are fitted together. At this time, raw materials are injected into the interior of the first mold 1 through the injection pipe 22. After cooling, the electric telescopic rod 3 drives the second mold 4 to move to the left. When the second mold 4 moves to the left, it drives the rotating rod 20 to move. Under the action of the spiral groove 6 and the threaded block 5, the rotating rod 20 makes a moving rotation. The rotation of the rotating rod 20 drives the rotating block 21 to rotate. The rotation of the rotating block 21 makes the cylindrical block 16 rotate relative to the circular block 11, causing the cylindrical block 16 to disengage from the first ventilation hole 12 opened in the circular block 11. The rotation of the rotating block 21 aligns the second ventilation hole 19 with the first ventilation hole 12. At this time, through the third ventilation hole 13, gas can be introduced between the object and the second mold 4, thereby effectively avoiding the occurrence of negative pressure during demolding, improving the demolding effect, and ensuring the integrity of the object at the same time;

[0029] When the second mold 4 moves to the left, it drives the long rod 8 to move to the right. The long rod 8 contacts the support seat 2, causing the pushing block 7 to move to the right relative to the second mold 4, thereby realizing the function of pushing the material and improving the material discharging effect.

[0030] Those of ordinary skill in the art should understand that the discussion of any embodiment above is only exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0031] The present invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A demoulding mechanism for an injection molding machine, comprising a first mold (1), a second mold (4) and a support seat (2), and the three are arranged horizontally from right to left in sequence, the left side of the support seat (2) is fixedly connected to an electric telescopic rod (3), the right side of the electric telescopic rod (3) is connected to the left side of the second mold (4), and the right side of the first mold (1) is fixedly connected to an injection molding tube (22), characterized in that: A demoulding mechanism capable of separating the object from the second mold (4) is provided on the left side of the second mold (4), and a material pushing assembly is provided on the left side of the second mold (4); The demoulding mechanism comprises a rotating rod (20) rotatably connected to the left side of the second mold (4); a circular cavity (10) is provided inside the second mold (4); a rotating block (21) is fixedly provided on the right side of the rotating rod (20); the outer side of the rotating block (21) matches the inner wall of the circular cavity (10); a circular block (11) is fixedly connected to the right side of the inner wall of the circular cavity (10); the left side of the circular block (11) is in contact with the right side of the rotating block (21); and grooves (18) are evenly provided on the right side of the rotating block (21); A first spring (17) is fixedly connected inside the groove (18); a cylindrical block (16) matching the groove (18) is fixedly connected on the right side of the first spring (17); first air holes (12) matching the cylindrical block (16) are evenly arranged inside the circular block (11); second air holes (19) are evenly arranged inside the rotating block (21); third air holes (13) are evenly arranged on the left side of the second mold (4) at the position of the circular cavity (10); and a rotating assembly is provided on the left side of the rotating rod (20).

2. The demoulding mechanism of an injection molding machine according to claim 1, characterized in that: The rotating assembly comprises a threaded block (5) fixedly connected to the inside of the support seat (2); a spiral groove (6) is provided on the left side of the rotating rod (20); and the spiral groove (6) is consistent with the inner wall of the threaded block (5).

3. The demoulding mechanism of an injection molding machine according to claim 1, characterized in that: The right side of the cylindrical block (16) is arranged in an arc shape.

4. The demoulding mechanism of an injection molding machine according to claim 1, characterized in that: The pusher assembly comprises a push block (7) interactively connected to the inside of the second mold (4); a long rod (8) is fixedly connected to the left side of the push block (7); a stopper is fixedly connected to the left side of the long rod (8); and a second spring (9) is sleeved on the left side of the rod wall of the long rod (8).

5. The demoulding mechanism of an injection molding machine according to claim 1, characterized in that: A first limit block (15) is evenly and fixedly connected to the right side of the rod wall of the rotating rod (20), and a second limit block (14) is evenly and fixedly connected to the left side wall of the circular cavity (10).

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