Demolding mold of shell injection mold

Abstract

The utility model relates to the technical field of shell injection molds, and discloses a demolding mold of a shell injection mold, which comprises a lower fixing seat, the interior of the lower fixing seat is hollow, a lower mold is fixedly mounted on the upper surface of the lower fixing seat, and guide columns are fixedly connected to four corners of the upper surface of the lower fixing seat. An upper fixing base is installed at the ends, away from the lower fixing base, of the four guide columns, an upper mold is slidably installed on the outer surfaces of the four guide columns in a sleeving mode, a hydraulic cylinder is fixedly installed in the middle of the face, close to the upper mold, of the upper fixing base, and the telescopic end of the hydraulic cylinder is fixedly connected with the upper mold. A tiny air layer can be formed between the finished product and the mold, the adsorption force between the finished product and the mold is reduced, the demolding process is easier, the demolding force can be more uniformly distributed on the contact surface of the finished product and the mold through air inlet, and product deformation or damage caused by overlarge local stress is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of shell injection molds, in particular to a demoulding mold of a shell injection mold. Background Art

[0002] An injection mold is a tool used to produce plastic products. It gives plastic products a complete structure and precise dimensions. This mold plays a vital role in the manufacturing process. Through injection molding technology, plastic parts with complex shapes and precise dimensions can be mass-produced.

[0003] In the manufacture of the shell, an injection mold is required. During the injection molding process, due to the close contact between the plastic and the mold surface and cooling shrinkage, a certain adsorption force will be generated between the finished product and the mold. This adsorption force may make demolding difficult or even damage the product. Utility Model Content

[0004] 1. Technical issues to be solved

[0005] In view of the deficiencies in the prior art, the utility model provides a demolding mold for a shell injection mold, which has the advantages of easy demolding, etc., and solves the problem that during the injection molding process of the existing injection mold, due to the close contact between the plastic and the mold surface and cooling shrinkage, a certain adsorption force will be generated between the finished product and the mold, and this adsorption force may make demolding difficult or even damage the product.

[0006] (II) Technical solution

[0007] In order to achieve the above-mentioned purpose of facilitating demoulding, the utility model provides the following technical solutions: a demoulding mold for a shell injection mold, comprising a lower fixed seat, the lower fixed seat is hollow inside, a lower mold is fixedly installed on the upper surface of the lower fixed seat, four corners of the upper surface of the lower fixed seat are fixedly connected with guide columns, an upper fixed seat is installed on the fixed seat at one end of the four guide columns away from the lower fixed seat, an upper mold is slidably installed on the outer surface of the four guide columns, a hydraulic cylinder is fixedly installed on the middle position of one side of the upper fixed seat close to the upper mold, and the telescopic end of the hydraulic cylinder is fixedly connected to the upper mold;

[0008] Among them, a forward and reverse motor is fixedly installed on the right surface of the lower fixed seat, and grooves are correspondingly opened on the inner walls on both sides of the lower fixed seat. Ejection devices are arranged inside the two grooves, and the ejection devices are used to demould the finished injection-molded shell;

[0009] The left side surface of the upper mold is fixedly connected with an injection tube, the injection tube is communicated with the interior of the upper mold, and an injection groove is opened inside the lower mold;

[0010] Among them, a through hole is opened on the upper surface of the lower fixing seat corresponding to the position of the injection groove, and sliding grooves are opened on the inner walls on both sides of the two through holes.

[0011] Preferably, the ejection device includes a rotating shaft, which is rotatably connected to the corresponding surfaces of the two grooves, and the output end of the forward and reverse motor rotates through the right side surface of the lower fixed seat and is fixedly connected to the rotating shaft;

[0012] Wherein, first bevel gears are fixedly sleeved on the outer surfaces of both ends of the rotating shaft, and the two first bevel gears are arranged in a mirror image.

[0013] Preferably, the inner top ends of the two grooves are rotatably connected with threaded rods, and the ends of the two threaded rods away from the tops of the grooves are fixedly connected with second bevel gears, and the two second bevel gears are respectively meshed and connected with the corresponding first bevel gears;

[0014] Wherein, the outer surfaces of the two threaded rods are threadedly connected with rectangular plates, and both ends of the rectangular plates are slidably connected with the inner wall of the groove;

[0015] Among them, two ejector rods are fixedly installed on the upper surface of the rectangular plate, and the two ejector rods are arranged in a mirror image. Both ejector rods are provided with air intake devices, which facilitate demoulding of the finished injection-molded shell product.

[0016] Preferably, the air intake device comprises a sleeve, which is movably sleeved on the outer surface of the ejector rod, and a movable plate is fixedly mounted on one end of the ejector rod away from the rectangular plate, and the movable plate is slidably connected to the inner wall of the sleeve;

[0017] Wherein, a first spring is fixedly installed on a side of the movable plate away from the ejection rod, and an end of the first spring away from the movable plate is fixedly installed on the inner wall of the sleeve;

[0018] Wherein, a vent hole is provided on the inner wall of the end of the sleeve away from the ejector rod;

[0019] Wherein, the left and right surfaces of the sleeve near one end of the through hole are both arranged as arc surfaces, and are slidably connected with the inner wall of the through hole.

[0020] Preferably, the inner bottom ends of the four slide grooves are all fixedly connected with second springs, and the four second springs are all fixedly installed with connecting blocks at one end away from the bottom of the slide groove, and the opposite surfaces of the connecting blocks in two corresponding slide grooves are fitted, and the four connecting blocks are all slidably connected with the inner wall of the slide groove;

[0021] Among them, the four connecting blocks are all arranged with inclined surfaces close to the sleeve;

[0022] Preferably, an air inlet hole is opened on the front surface of the lower fixing seat, and the elasticity of the first spring is greater than the elasticity of the second spring.

[0023] (III) Beneficial effects

[0024] Compared with the prior art, the utility model provides a demoulding mold for a shell injection mold, which has the following beneficial effects:

[0025] 1. In the demoulding mold of the shell injection mold, the ejector rod squeezes the first spring to allow the air in the sleeve to enter between the lower mold and the finished product. By letting air in between the lower mold and the finished product, a tiny air layer can be formed between the finished product and the mold, reducing the adsorption force between the two and making the demoulding process easier. The air intake can make the demoulding force more evenly distributed on the contact surface between the finished product and the mold, avoiding product deformation or damage caused by excessive local stress. This uniform distribution of demoulding force helps to improve the success rate of demoulding and the quality of the product.

[0026] 2. In the demoulding mold of the shell injection mold, the rotation of the threaded rod drives the rectangular plate to move up and down, and further drives the ejector rod to move up and down. When the finished product is ejected from the mold, if only one end is subjected to force, it may cause uneven force on the finished product, resulting in deformation or damage. Ejecting at both ends at the same time can ensure that the finished product is subjected to uniform force, reduce the risk of deformation and damage, and improve product quality. The ejector device can quickly and accurately eject the finished product from the mold, greatly shortening the time required for demoulding, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 This is a schematic diagram of the transverse cross-sectional structure of the utility model;

[0029] Figure 3 It is a vertical cross-sectional structural schematic diagram of the utility model;

[0030] Figure 4 for Figure 2 A schematic diagram of the enlarged structure at A in the middle;

[0031] Figure 5 for Figure 2 Schematic diagram of the enlarged structure at point B in the middle.

[0032] In the figure: 1. lower fixed seat; 2. upper fixed seat; 3. guide column; 4. upper mold; 5. hydraulic cylinder; 6. injection tube; 7. forward and reverse motor; 8. lower mold; 9. injection groove; 10. groove; 11. rotating shaft; 12. first bevel gear; 13. second bevel gear; 14. threaded rod; 15. rectangular plate; 16. ejector rod; 17. air inlet; 18. sleeve; 19. through hole; 20. vent; 21. movable plate; 22. first spring; 23. slide groove; 24. second spring; 25. connecting block. DETAILED DESCRIPTION

[0033] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0034] See also Figure 1-5 The utility model provides a new technical solution: a demoulding mold for a shell injection mold, comprising a lower fixed seat 1, the lower fixed seat 1 is hollow inside, a lower mold 8 is fixedly installed on the upper surface of the lower fixed seat 1, four corners of the upper surface of the lower fixed seat 1 are fixedly connected with guide columns 3, an upper fixed seat 2 is installed on the fixed seat at one end of the four guide columns 3 away from the lower fixed seat 1, an upper mold 4 is slidably installed on the outer surfaces of the four guide columns 3, a hydraulic cylinder 5 is fixedly installed on the middle position of one side of the upper fixed seat 2 close to the upper mold 4, and the telescopic end of the hydraulic cylinder 5 is fixedly connected to the upper mold 4;

[0035] Among them, a forward and reverse motor 7 is fixedly installed on the right side surface of the lower fixed seat 1, and grooves 10 are correspondingly opened on the inner walls of both sides of the lower fixed seat 1. The insides of the two grooves 10 are both provided with ejection devices, and the ejection devices are used to demould the finished injection-molded shell;

[0036] The left side surface of the upper mold 4 is fixedly connected with an injection tube 6, the injection tube 6 is communicated with the interior of the upper mold 4, and an injection groove 9 is opened inside the lower mold 8;

[0037] A through hole 19 is formed on the upper surface of the lower fixing seat 1 at a position corresponding to the injection groove 9 , and sliding grooves 23 are formed on the inner walls of both sides of the two through holes 19 .

[0038] Furthermore, the ejection device includes a rotating shaft 11, which is rotatably connected to the corresponding surfaces of the two grooves 10, and the output end of the forward and reverse motor 7 rotates through the right side surface of the lower fixed seat 1 and is fixedly connected to the rotating shaft 11;

[0039] The outer surfaces of both ends of the rotating shaft 11 are fixedly sleeved with first bevel gears 12 , and the two first bevel gears 12 are arranged in a mirror image.

[0040] Furthermore, the inner top ends of the two grooves 10 are rotatably connected with threaded rods 14, and the ends of the two threaded rods 14 away from the top of the grooves 10 are fixedly connected with second bevel gears 13, and the two second bevel gears 13 are respectively meshed and connected with the corresponding first bevel gears 12;

[0041] Among them, the outer surfaces of the two threaded rods 14 are threadedly connected with a rectangular plate 15, and both ends of the rectangular plate 15 are slidably connected with the inner wall of the groove 10. The forward and reverse motor 7 is started. When the forward and reverse motor 7 rotates forward, it drives the rotating shaft 11 to rotate, drives the first bevel gear 12 thereon to rotate, and further drives the second bevel gear 13 meshing therewith to rotate, so that the threaded rod 14 rotates and drives the rectangular plate 15 to move upward, and the ejector rod 16 thereon ejects the injection molded product. Ejecting at both ends at the same time can ensure that the finished product is evenly stressed, reduce the risk of deformation and damage, and improve product quality. The ejector device can quickly and accurately eject the finished product from the mold, greatly shortening the time required for demoulding, thereby improving production efficiency;

[0042] Among them, two ejector rods 16 are fixedly installed on the upper surface of the rectangular plate 15. The two ejector rods 16 are arranged in a mirror image. Both ejector rods 16 are provided with air intake devices, which facilitate demoulding of the finished injection-molded shell.

[0043] Furthermore, the air intake device includes a sleeve 18, which is movably sleeved on the outer surface of the ejector rod 16, and a movable plate 21 is fixedly installed on one end of the ejector rod 16 away from the rectangular plate 15, and the movable plate 21 is slidably connected to the inner wall of the sleeve 18;

[0044] The first spring 22 is fixedly mounted on the side of the movable plate 21 away from the ejection rod 16, and the end of the first spring 22 away from the movable plate 21 is fixedly mounted on the inner wall of the sleeve 18;

[0045] A vent hole 20 is provided on the inner wall of the sleeve 18 at one end away from the ejector rod 16;

[0046] The left and right surfaces of one end of the sleeve 18 close to the through hole 19 are both arc-shaped and are slidably connected to the inner wall of the through hole 19 .

[0047] Furthermore, the inner bottom ends of the four slide grooves 23 are all fixedly connected with second springs 24, and the four second springs 24 are all fixedly installed with connecting blocks 25 at one end away from the bottom of the slide groove 23, and the opposite surfaces of the connecting blocks 25 in two corresponding slide grooves 23 are fitted, and the four connecting blocks 25 are all slidably connected with the inner wall of the slide groove 23;

[0048] Among them, the four connecting blocks 25 are all inclined on one side close to the sleeve 18;

[0049] Furthermore, an air inlet 17 is provided on the front surface of the lower fixed seat 1. The elasticity of the first spring 22 is greater than that of the second spring 24. The ejector rod 16 drives the movable plate 21 to move upward to compress the first spring 22, and at the same time drives the sleeve 18 to move forward, thereby pushing the connecting block 25. The connecting block 25 compresses the second spring 24 to move to both sides. Since the elasticity of the first spring 22 is greater than that of the second spring 24, the ejector rod 16 will continue to compress the first spring 22, and at the same time, the air inside the sleeve 18 will be discharged into the gap between the lower mold 8 and the injection molded product through the air vent 20. By taking in air between the lower mold 8 and the finished product, a tiny air layer can be formed between the finished product and the mold, reducing the adsorption force between the two, making the demoulding process easier. The air intake can make the demoulding force more evenly distributed on the contact surface between the finished product and the mold, avoiding product deformation or damage caused by excessive local stress. This uniform distribution of demoulding force helps to improve the success rate of demoulding and the quality of the product.

[0050] Working principle: When using this device, start the forward and reverse motor 7. When the forward and reverse motor 7 rotates forward, it drives the rotating shaft 11 to rotate, drives the first bevel gear 12 thereon to rotate, and further drives the second bevel gear 13 meshing therewith to rotate, so that the threaded rod 14 rotates to drive the rectangular plate 15 to move upward, and the ejector rod 16 thereon ejects the injection molded product. Ejecting at both ends at the same time can ensure that the finished product is evenly stressed, reduce the risk of deformation and damage, and improve product quality. The ejector device can quickly and accurately eject the finished product from the mold, greatly shortening the time required for demolding, thereby improving production efficiency.

[0051] The ejector rod 16 drives the movable plate 21 to move upward to compress the first spring 22, and drives the sleeve 18 to move forward, thereby pushing the connecting block 25. The connecting block 25 compresses the second spring 24 to move to both sides. Since the elasticity of the first spring 22 is greater than the elasticity of the second spring 24, the ejector rod 16 will continue to compress the first spring 22, and at the same time, the air inside the sleeve 18 is discharged into the gap between the lower mold 8 and the injection molded product through the vent 20. By taking in air between the lower mold 8 and the finished product, a tiny air layer can be formed between the finished product and the mold, reducing the adsorption force between the two, making the demoulding process easier. The air intake can make the demoulding force more evenly distributed on the contact surface between the finished product and the mold, avoiding product deformation or damage due to excessive local stress. This uniform distribution of demoulding force helps to improve the success rate of demoulding and the quality of the product.

[0052] 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. A demoulding mold for a shell injection mold, comprising a lower fixed seat (1), the interior of the lower fixed seat (1) is hollow, a lower mold (8) is fixedly installed on the upper surface of the lower fixed seat (1), four corners of the upper surface of the lower fixed seat (1) are fixedly connected with guide columns (3), and an upper fixed seat (2) is installed on the fixed seat of the four guide columns (3) away from one end of the lower fixed seat (1), characterized in that: An upper mold (4) is slidably mounted on the outer surfaces of the four guide columns (3); a hydraulic cylinder (5) is fixedly mounted on the middle position of one side of the upper fixed seat (2) close to the upper mold (4); and the telescopic end of the hydraulic cylinder (5) is fixedly connected to the upper mold (4); A forward and reverse motor (7) is fixedly mounted on the right side surface of the lower fixing seat (1), grooves (10) are correspondingly provided on the inner walls on both sides of the lower fixing seat (1), and ejection devices are provided inside the two grooves (10), and the ejection devices are used to demould the finished injection-molded shell; The left side surface of the upper mold (4) is fixedly connected with an injection tube (6), the injection tube (6) is communicated with the interior of the upper mold (4), and an injection groove (9) is provided inside the lower mold (8); Wherein, a through hole (19) is provided on the upper surface of the lower fixing seat (1) at a position corresponding to the injection molding groove (9), and sliding grooves (23) are provided on the inner walls on both sides of the two through holes (19).

2. The demoulding mold of a housing injection mold according to claim 1, characterized in that: The ejection device comprises a rotating shaft (11), the rotating shaft (11) is rotatably connected to the corresponding surfaces of the two grooves (10), and the output end of the forward and reverse motor (7) rotates through the right side surface of the lower fixed seat (1) and is fixedly connected to the rotating shaft (11); Wherein, first bevel gears (12) are fixedly sleeved on the outer surfaces of both ends of the rotating shaft (11), and the two first bevel gears (12) are arranged in a mirror image.

3. The demoulding mold of a housing injection mold according to claim 2, characterized in that: The inner top ends of the two grooves (10) are rotatably connected to threaded rods (14), and the ends of the two threaded rods (14) away from the top ends of the grooves (10) are fixedly connected to second bevel gears (13), and the two second bevel gears (13) are respectively meshed and connected with the corresponding first bevel gears (12); The outer surfaces of the two threaded rods (14) are threadedly connected with a rectangular plate (15), and both ends of the rectangular plate (15) are slidably connected to the inner wall of the groove (10); Two ejector rods (16) are fixedly mounted on the upper surface of the rectangular plate (15), the two ejector rods (16) are arranged in a mirror image, and both ejector rods (16) are provided with air intake devices, which facilitate demoulding of the finished injection-molded shell.

4. The demoulding mold of a housing injection mold according to claim 3, characterized in that: The air intake device comprises a sleeve (18), the sleeve (18) being movably sleeved on the outer surface of the ejector rod (16), a movable plate (21) being fixedly mounted on one end of the ejector rod (16) away from the rectangular plate (15), and the movable plate (21) being slidably connected to the inner wall of the sleeve (18); A first spring (22) is fixedly mounted on one side of the movable plate (21) away from the ejector rod (16), and an end of the first spring (22) away from the movable plate (21) is fixedly mounted on the inner wall of the sleeve (18); A vent hole (20) is provided on the inner wall of one end of the sleeve (18) away from the ejection rod (16); The left and right surfaces of one end of the sleeve (18) close to the through hole (19) are both arranged as arc surfaces, and are slidably connected to the inner wall of the through hole (19).

5. The demoulding mold of a housing injection mold according to claim 4, characterized in that: The inner bottom ends of the four slide grooves (23) are all fixedly connected with second springs (24), and the four second springs (24) are all fixedly installed with connecting blocks (25) at one end away from the bottom of the slide groove (23), and the opposite surfaces of the connecting blocks (25) in two corresponding slide grooves (23) are fitted, and the four connecting blocks (25) are all slidably connected with the inner wall of the slide groove (23); Wherein, the four connecting blocks (25) are all arranged with inclined surfaces close to the sleeve (18); 6. The demoulding mold of a housing injection mold according to claim 5, characterized in that: An air inlet hole (17) is provided on the front surface of the lower fixing seat (1), and the elasticity of the first spring (22) is greater than the elasticity of the second spring (24).

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