Internal thread injection mold

Abstract

The utility model discloses an internal thread injection mold, and particularly relates to the field of internal thread injection molds, the internal thread injection mold comprises a fixed mold, one side of the fixed mold is fixedly connected with a front mold core, one side of the front mold core is fixedly connected with a rear mold core, one side of the rear mold core is provided with a movable mold mechanism, one side of the movable mold mechanism is provided with a support plate, and the support plate is fixedly connected with the fixed mold. A push plate mechanism is arranged between the movable mold mechanism and the supporting plate, and guide columns are symmetrically inserted in the periphery of the movable mold mechanism. According to the utility model, firstly, raw materials are injected into the three cavities through the glue injection ports, so that the raw materials can be simultaneously injected from three side directions of a workpiece, the situation of partial position loss can be avoided, the integrity of a finished product is improved, and the quality of the finished product is improved; the insert can be pushed out by pushing the first ejector rod through the first spring, and finished workpieces and cavities can be automatically discharged by pushing the push plate mechanism, so that continuous machining and manufacturing are facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of internal thread injection molds, and more specifically, to an internal thread injection mold. Background Art

[0002] Injection molding is also called injection molding, which is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into complex-shaped parts. Injection molding is suitable for mass production and complex-shaped products and other molding and processing fields;

[0003] At present, many precision plastic parts need to be processed with internal thread structures in order to be suitable for precision parts. When plastic products with internal threads are injection molded, a screw core with external threads is generally required to process the internal threads of the product through the screw core. The injection molding production of the product is completed through the joint action of the screw core and the mold cavity.

[0004] In the existing injection molds for making internal threaded workpieces, during injection molding, most of the injection flow channels are one, and the raw materials are injected into the cavity through the injection pipe located on one side of the cavity. It is easy for glue to be missing in some positions and the concentricity of the product to be not precise enough, resulting in incomplete finished products and inconvenience in unloading the finished products. Utility Model Content

[0005] In order to overcome the above defects of the prior art, the utility model provides an internal thread injection mold to solve the problems raised in the above background technology.

[0006] To achieve the above object, the utility model provides the following technical solution: an internal thread injection mold, comprising a fixed mold, one side of the fixed mold is fixedly connected to a front mold core, one side of the front mold core is fixedly connected to a rear mold core, one side of the rear mold core is provided with a movable mold mechanism, one side of the movable mold mechanism is provided with a support plate, a push plate mechanism is provided between the movable mold mechanism and the support plate, and guide pillars are symmetrically inserted around the movable mold mechanism;

[0007] A second push rod and a third push rod are arranged on one side of the push plate mechanism, a through hole is opened in the middle of the support plate, and a second spring is arranged around the push plate mechanism near the movable mold mechanism;

[0008] A cavity is arranged between the rear mold core and the movable mold mechanism, a glue dispensing port is arranged on one side of the cavity, a mold groove is correspondingly opened on the opposite side of the rear mold core and the movable mold mechanism, a first push rod is arranged on one side of the inner cavity of the mold groove, a first spring is arranged on one side of the first push rod, an insert is inserted in the middle of the mold groove, and an injection threaded core rod is inserted in the middle of the insert.

[0009] Preferably, a glue injection port is opened on one side of the fixed mold, and the inner cavity of the glue injection port is connected with the inner cavities of the three cavities through three flow channels in the middle of the front mold core and the rear mold core respectively, and glue is evenly injected at three points to ensure the concentricity of the product.

[0010] Preferably, the three cavities are evenly distributed around the mold groove, the glue dispensing port is located on a side close to the mold groove, and the glue dispensing port is communicated with the mold groove.

[0011] Preferably, the first spring is arranged on a side of the first ejector rod away from the insert, the number of the second ejector rods is three, and one end of the second ejector rod corresponds to the middle part of the inner cavity of the cavity.

[0012] Preferably, the molding material between the mold groove, the injection molding threaded core rod and the insert is set as a workpiece, and the outer surface of one end of the injection molding threaded core rod is provided with a thread.

[0013] Preferably, one end of the insert is inserted into the middle of the mold groove on one side of the rear mold core, and one end of the injection threaded core rod is inserted into the middle of the mold groove on one side of the movable mold structure and fits with one end of the third ejector rod.

[0014] Preferably, positioning grooves are symmetrically arranged around the movable mold mechanism, and positioning rods are symmetrically fixedly connected around the rear mold core, the positioning rods correspond to the positioning grooves, and the positioning rods are inserted into the interior of the positioning grooves.

[0015] Technical effects and advantages of the utility model:

[0016] The utility model firstly injects raw materials into the inside of the three cavities through the injection port, and the three flow channels are respectively connected with the inner cavities of the three cavities and the glue is uniformly injected at three points, which can ensure the concentricity of the product, avoid the situation of partial position loss, improve the integrity of the finished product, and improve the quality of the finished product. At the same time, the movable mold mechanism and the rear mold core are separated, and the insert can be pushed out by the first spring to push the first push rod, and the second push rod and the third push rod push the injection thread core rod and the cavity by pushing the push plate mechanism, so that the finished workpiece and the cavity can be automatically unloaded, which is convenient for continuous processing and production;

[0017] 1. The utility model also improves the stability of the movement of the push plate mechanism by setting the guide column, and pushes the push plate mechanism by the second spring, so that the push plate mechanism can be limited when it is not pushed, so that the push plate mechanism has the function of automatic reset, and is convenient for installing and using the injection threaded core rod and inserts, and through the cooperation of the positioning rod and the positioning groove, the rear mold core and the movable mold mechanism can be positioned, thereby improving the positioning accuracy and the quality of the finished product;

[0018] In summary, through the mutual influence of the above-mentioned multiple effects, it is possible to simultaneously inject raw materials from three sides of the workpiece, avoid the situation where some parts are missing, improve the integrity of the finished product, improve the quality of the finished product, and facilitate cutting and continuous processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] Figure 2 It is a schematic diagram of the split structure of the rear mold core and the movable mold mechanism of the utility model.

[0021] Figure 3 It is a schematic diagram of the cross-sectional structure of the utility model.

[0022] Figure 4 For this utility model Figure 3 Schematic diagram of the local enlarged structure at point A in the middle.

[0023] The accompanying drawings are marked as follows: 1. fixed mold; 2. front mold core; 3. rear mold core; 4. movable mold mechanism; 5. support plate; 6. push plate mechanism; 7. glue injection port; 8. cavity; 9. glue dispensing port; 10. mold groove; 11. insert; 12. injection thread core rod; 13. workpiece; 14. first ejector pin; 15. first spring; 16. second spring; 17. second ejector pin; 18. third ejector pin; 19. through hole; 20. guide column; 21. positioning rod; 22. positioning groove. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] As attached Figure 1-4The internal thread injection mold shown includes a fixed mold 1, a front mold core 2 is fixedly connected to one side of the fixed mold 1, a rear mold core 3 is fixedly connected to one side of the front mold core 2, and a movable mold mechanism 4 is arranged on one side of the rear mold core 3. The fixed mold 1, the front mold core 2, and the rear mold core 3 form a fixed upper mold, and the movable mold mechanism 4, the support plate 5, and the push plate mechanism 6 form a movable lower mold, which is convenient for injection molding. A support plate 5 is arranged on one side of the movable mold mechanism 4, and a push plate mechanism 6 is arranged between the movable mold mechanism 4 and the support plate 5. Guide pillars 20 are symmetrically inserted around the movable mold mechanism 4. The push plate mechanism 6 moves between the support plate 5 and the movable mold mechanism 4, so that the finished workpiece 13 can be easily pushed out for unloading, and the guide pillars 20 can improve the stability of the movement of the push plate mechanism 6.

[0026] A second push rod 17 and a third push rod 18 are provided on one side of the push plate mechanism 6, a through hole 19 is provided in the middle of the support plate 5, and a second spring 16 is provided around the push plate mechanism 6 near the movable mold mechanism 4. The push plate mechanism 6 drives the second push rod 17 and the third push rod 18 to move, so that the workpiece 13 and the injection threaded core rod 12 on one side of the movable mold mechanism 4 can be pushed out, which is convenient for unloading, and the push plate mechanism 6 can be pushed conveniently through the through hole 19, and the push plate mechanism 6 can be easily reset for secondary injection molding through the second spring 16;

[0027] A cavity 8 is arranged between the rear mold core 3 and the movable mold mechanism 4, a glue dispensing port 9 is arranged on one side of the cavity 8, a mold groove 10 is correspondingly opened on the opposite side of the rear mold core 3 and the movable mold mechanism 4, a first push rod 14 is arranged on one side of the inner cavity of the mold groove 10, a first spring 15 is arranged on one side of the first push rod 14, an insert 11 is inserted in the middle of the mold groove 10, and an injection molding thread core rod 12 is inserted in the middle of the insert 11. The cavity 8 is convenient for simultaneously injecting raw materials into three sides of the cavity where the workpiece 13 is located, thereby improving the quality of the finished product, and the insert 11 and the injection molding thread core rod 12 are conveniently inserted and connected through the mold groove 10, thereby forming a cavity for forming the workpiece 13, which is convenient for processing, manufacturing and use, and the finished product of the workpiece 13 is finalized by the cooperation of the injection molding thread core rod 12 and the insert 11, thereby improving the effect of the finished product.

[0028] As attached Figure 1-4 As shown, a glue injection port 7 is opened on one side of the fixed mold 1, and the inner cavity of the glue injection port 7 is connected with the inner cavities of the three cavities 8 through three connecting holes in the middle of the front mold core 2 and the rear mold core 3 respectively, and raw materials are injected into the interior of the cavity 8 through the glue injection port 7.

[0029] As attached Figure 2-4 As shown, three cavities 8 are evenly distributed around the mold groove 10, and the glue dispensing port 9 is located on the side close to the mold groove 10. The glue dispensing port 9 is connected to the mold groove 10. The raw material inside the cavity 8 is input into the cavity position where the workpiece 13 is located through the glue dispensing port 9 and is cooled into the workpiece 13.

[0030] As attached Figure 3 , 4 As shown, the first spring 15 is arranged on the side of the first push rod 14 away from the insert 11, the number of the second push rods 17 is three, and one end of the second push rod 17 corresponds to the middle part of the inner cavity of the cavity 8. By pushing the first push rod 14 by the first spring 15, one end of the insert 11 can be pushed out from the inside of the mold groove 10 on one side of the rear mold core 3 during material cutting, which facilitates material cutting.

[0031] As attached Figure 3 , 4 As shown, the molding material between the mold groove 10 and the injection molding thread mandrel 12 and the insert 11 is set as a workpiece 13, and the outer surface of one end of the injection molding thread mandrel 12 is provided with a thread, so that the workpiece 13 is conveniently molded through the cavity where the workpiece 13 is located, and the workpiece 13 with an internal thread is formed by the thread on the surface of the injection molding thread mandrel 12.

[0032] As attached Figure 3 , 4 As shown, one end of the insert 11 is inserted into the middle of the mold groove 10 on one side of the rear mold core 3, and one end of the injection molding thread core rod 12 is inserted into the middle of the mold groove 10 on one side of the movable mold structure 4 and fits with one end of the third push rod 18. The insert 11 is limited by the mold groove 10 on one side of the rear mold core 3, and the injection molding thread core rod 12 is limited by the mold groove 10 on one side of the movable mold structure 4, so that the insert 11 and the injection molding thread core rod 12 are combined with the mold groove 10 to form a cavity where the workpiece 13 is located, which is convenient for making a workpiece 13 with an internal thread.

[0033] As attached Figure 2 As shown, the movable mold mechanism 4 is symmetrically provided with positioning grooves 22 around it, and the rear mold core 3 is symmetrically fixedly connected with positioning rods 21 around it, the positioning rods 21 correspond to the positioning grooves 22, and the positioning rods 21 are inserted into the positioning grooves 22. Through the cooperation of the positioning rods 21 and the positioning grooves 22, the clamping tightness of the fixed mold 1 and the movable mold mechanism 4 is improved, and the use effect is improved;

[0034] It is worth noting that the clamping force is provided by the clamping system of the injection molding machine to lock the clamping strength of the movable mold mechanism 4 and the rear mold core 3. At the same time, a push rod corresponding to the through hole 19 is provided on one side of the support plate 5, so that when the mold is opened, the support plate 5 moves to a certain angle so that the push rod can push the push plate mechanism 6. These are all existing technologies and are not shown in the figure.

[0035] Working principle of the utility model: when in use, it is only necessary to fix the fixed mold 1 at a preset position, insert the insert 11 into the middle of the mold groove 10 on one side of the rear mold core 3, insert the injection threaded core rod 12 into the middle of the mold groove 10 on one side of the movable mold mechanism 4, and control the movable mold mechanism 4 and the rear mold core 3 to close the mold and lock;

[0036] The raw material is injected through the injection port 7, and then sequentially enters the interior of the cavity 8 and is injected through the dispensing port 9 into the middle of the cavity composed of the injection threaded core rod 12, the insert 11, and the mold groove 10 to fix the unmolded workpiece 13;

[0037] When unloading, the support plate 5 and the movable mold mechanism 4 are controlled to move to the side away from the fixed mold 1, so that the movable mold mechanism 4 and the rear mold core 3 are separated. At this time, the first spring 15 pushes the first push rod 14 to move one end of the insert 11 out of the mold groove 10. At this time, the finished product, the insert 11, and the injection threaded core rod 12 are all located on one side of the movable mold mechanism 4;

[0038] When the support plate 5 moves to a certain position and the push rod pushes the push plate mechanism 6, the fixed raw material in the middle of the cavity 8 and the injection threaded core rod 12 and the workpiece 13 can be pushed out by the second push rod 17 and the third push rod 18, which is convenient for unloading.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An internal thread injection mold, comprising a fixed mold (1), characterized in that: A front mold core (2) is fixedly connected to one side of the fixed mold (1), a rear mold core (3) is fixedly connected to one side of the front mold core (2), a movable mold mechanism (4) is provided on one side of the rear mold core (3), a support plate (5) is provided on one side of the movable mold mechanism (4), a push plate mechanism (6) is provided between the movable mold mechanism (4) and the support plate (5), and guide pillars (20) are symmetrically inserted around the movable mold mechanism (4); A second push rod (17) and a third push rod (18) are provided on one side of the push plate mechanism (6), a through hole (19) is provided in the middle of the support plate (5), and a second spring (16) is provided around the push plate mechanism (6) near the movable mold mechanism (4); A cavity (8) is provided between the rear mold core (3) and the movable mold mechanism (4), a dispensing port (9) is provided on one side of the cavity (8), a mold groove (10) is provided on the opposite side of the rear mold core (3) and the movable mold mechanism (4), a first ejector rod (14) is provided on one side of the inner cavity of the mold groove (10), a first spring (15) is provided on one side of the first ejector rod (14), an insert (11) is inserted in the middle of the mold groove (10), and an injection threaded core rod (12) is inserted in the middle of the insert (11).

2. The internal thread injection mold according to claim 1, characterized in that: A glue injection port (7) is provided on one side of the fixed mold (1), and the inner cavity of the glue injection port (7) is respectively connected to the inner cavities of the three mold cavities (8) through three connecting holes in the middle of the front mold core (2) and the rear mold core (3).

3. The internal thread injection mold according to claim 1, characterized in that: The three cavities (8) are evenly distributed around the mold groove (10), the glue dispensing port (9) is located on a side close to the mold groove (10), and the glue dispensing port (9) is connected to the mold groove (10).

4. The internal thread injection mold according to claim 1, characterized in that: The first spring (15) is arranged on a side of the first ejector rod (14) away from the insert (11), the number of the second ejector rods (17) is three, and one end of the second ejector rod (17) corresponds to the middle of the inner cavity of the cavity (8).

5. The internal thread injection mold according to claim 1, characterized in that: The molding material between the mold groove (10), the injection molding threaded core rod (12) and the insert (11) is arranged as a workpiece (13), and a thread is arranged on the outer surface of one end of the injection molding threaded core rod (12).

6. The internal thread injection mold according to claim 1, characterized in that: One end of the insert (11) is inserted into the middle of the mold groove (10) on one side of the rear mold core (3), and one end of the injection thread core rod (12) is inserted into the middle of the mold groove (10) on one side of the movable mold mechanism (4) and fits with one end of the third ejector rod (18).

7. The internal thread injection mold according to claim 1, characterized in that: The movable mold mechanism (4) is symmetrically provided with positioning grooves (22) on its periphery, and the rear mold core (3) is symmetrically fixedly connected with positioning rods (21) on its periphery, the positioning rods (21) corresponding to the positioning grooves (22), and the positioning rods (21) are inserted into the interior of the positioning grooves (22).

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