Secondary injection molding shrinkage correction device

Abstract

The utility model discloses a secondary injection molding shrinkage correction device which comprises a product, a metal piece arranged on one side of the product, an upper mold arranged above the product, a lower mold arranged below the product, an upper correction mold arranged above the metal piece, and a lower correction mold arranged below the metal piece. The upper correcting die and the lower correcting die are formed by splicing an upper sliding block and a lower sliding block, a product groove is formed in the top of the upper sliding block, a rotating rod is arranged at the bottom of the upper sliding block, the surface of the rotating rod is sleeved with a torque spring, a threaded base is arranged at the front end of the lower sliding block, and a fastening screw is rotationally installed in the center of the threaded base. The upper correcting die and the lower correcting die are inserted into the joint of the metal piece and the product, and the product groove in the correcting die has a certain upward inclination angle, so that the metal piece is jacked up to incline, the downward pulling deformation angle of the formed metal position is neutralized, and the percent of pass of the later product is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of injection molds, and particularly relates to a secondary injection molding shrinkage correction device. Background Art

[0002] In some conventional injection molds, metal parts need to be inserted. To achieve the best installation effect, the metal parts are generally directly installed and fixed in the mold before injection molding, so that the metal parts can be completely embedded in the injection mold. However, due to the differences between the metal material and the injection material, after the product injection is completed, due to a series of factors such as gravity demolding, the metal sags downward, causing deformation at the interface, and the connection effect of the overall product at the interface is not good. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a secondary injection molding shrinkage correction device to solve the problems raised in the above background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: A secondary injection molding shrinkage correction device includes a product. A metal part is arranged on one side of the product. An upper mold is arranged above the product. A lower mold is arranged below the product. An upper correction mold is arranged above the metal part. A lower correction mold is arranged below the metal part. The upper correction mold and the lower correction mold are spliced by an upper slider and a lower slider. A product groove is formed at the top of the upper slider. A rotating rod is arranged at the bottom of the upper slider. A torsion spring is sleeved on the surface of the rotating rod. A threaded base is arranged at the front end of the lower slider. A fastening screw is rotatably installed at the center of the threaded base. The top of the fastening screw passes through the upper slider. A fixing ring is fixedly connected to the center position of the fastening screw. The fixing ring is inlaid and installed in the upper slider. An adjustment groove is formed at the top of the fastening screw.

[0005] Preferably, a deformation gap is left between the upper slider and the lower slider, and a deformation gap needs to be left at the contact positions of the upper correction mold, the lower correction mold and the product.

[0006] Preferably, scale lines are arranged on the surface of the top of the fastening screw, and the scale line values of the upper correction mold and the lower correction mold need to be opposite.

[0007] Preferably, the pressing force between the upper correction mold and the lower correction mold should not be too large.

[0008] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0009] 1. For this secondary injection molding shrinkage correction device, by inserting upper and lower correction molds at the connection between the metal part and the product, and the product groove in the correction mold has a certain upward inclination angle, so as to lift and tilt the metal part, thereby neutralizing the downward deformation angle of the metal position after molding and improving the qualified rate of the later product.

[0010] 2. The secondary injection molding shrinkage correction device is connected between the upper and lower sliders by front fastening screws. The rotation of the fastening screws changes the length of the screw thread inserted into the threaded base, and a torque spring on the front rotating rod applies force, thereby changing the angle between the upper slider and the lower slider, and changing the inclination angle of the product groove, so as to adapt to and neutralize the different metal downward deformation amounts of different models of products, greatly improving the applicable range of the device. Description of the Drawings

[0011] Figure 1 It is an exploded schematic view of the structure of the present utility model;

[0012] Figure 2 It is a horizontal cross-sectional view of the structure of the present utility model;

[0013] Figure 3 It is a longitudinal cross-sectional view of the position of the fastening screw of the structure of the present utility model.

[0014] In the figure: 1. Product; 2. Upper mold; 3. Lower mold; 4. Upper correction mold; 5. Lower correction mold; 101. Metal part; 501. Upper slider; 502. Lower slider; 503. Rotating rod; 504. Torque spring; 505. Threaded base; 506. Fastening screw; 507. Fixed ring. Detailed Embodiment

[0015] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present utility model.

[0016] Embodiment: Please refer to Figures 1 - 3 , the present utility model provides a technical solution: a secondary injection molding shrinkage correction device, including a product 1. Among them, a metal part 101 is arranged on one side of the product 1, an upper mold 2 is arranged above the product 1, a lower mold 3 is arranged below the product 1, an upper correction mold 4 is arranged above the metal part 101, a lower correction mold 5 is arranged below the metal part 101. The upper correction mold 4 and the lower correction mold 5 are spliced by an upper slider 501 and a lower slider 502. A product groove is opened at the top of the upper slider 501. A rotating rod 503 is arranged at the bottom of the upper slider 501. A torque spring 504 is sleeved on the surface of the rotating rod 503. A threaded base 505 is arranged at the front end of the lower slider 502. A fastening screw 506 is rotatably installed at the center of the threaded base 505. The top of the fastening screw 506 passes through the upper slider 501. A fixed ring 507 is fixedly connected to the center position of the fastening screw 506. The fixed ring 507 is inlaid and installed in the upper slider 501. An adjustment groove is opened at the top of the fastening screw 506.

[0017] In this embodiment, the metal part 101 on one side of the product 1 is inlaid in the product 1. The upper correction mold 4 and the lower correction mold 5 are specifically used to position the metal part 101. The metal part 101 is placed in the product groove. After the mold is closed, the upper correction mold 4 and the lower correction mold 5 are attached to the upper mold 2 and the lower mold 3, and the overall mold is closed for injection molding. The upper slider 501 and the lower slider 502 are sleeved with connecting blocks on the rotating rod 503, so as to connect the two, and are pushed by the torsion spring 504 to make the front ends of the two sliders open in opposite directions. The front ends are connected by the fastening screws 506 installed by rotation. The fastening screws 506 are inlaid on the upper slider 501 through the fixing ring 507 and will not fall off. When it rotates, the bottom thread meshes with the thread in the thread base 505, and meshes or loosens with the rotation to increase or decrease the distance between the upper slider 501 and the lower slider 502 at the front end. The whole takes the rotating rod 503 as the axis to change the included angle between the upper slider 502 and the lower slider 502, so as to adjust the angle of the product groove, and perform upper pressure neutralization according to the actual downward deformation angle of the metal.

[0018] Among them, there is a deformation gap between the upper slider 501 and the lower slider 502, and deformation gaps need to be left at the contact positions of the upper correction mold 4, the lower correction mold 5 and the product 1.

[0019] In this embodiment, multiple deformation gaps can provide sufficient moving space between the upper correction mold 4 and the lower correction mold 5 to avoid extrusion deformation during the adjustment of the included angle.

[0020] Among them, scale lines are provided on the top surface of the fastening screw 506, and the scale line values of the upper correction mold 4 and the lower correction mold 5 need to be opposite.

[0021] In this embodiment, the scale lines facilitate confirming the rotation angle of the fastening screw 506. The rotation values of the two correction molds are the same, but the directions are opposite, ensuring that the rotation angles of the two upper sliders 501 are the same and can be closely attached when the mold is closed.

[0022] Among them, the pressing force between the upper correction mold 4 and the lower correction mold 5 should not be too large.

[0023] In this embodiment, in order to prevent the fastening screw 506 from slipping on the thread base 505, the two correction molds should not be forcibly pressed.

[0024] Working principle: The metal part 101 on the product 1 is fixed through the product grooves of two correction molds. There is a certain inclination angle between the upper slider 501 and the lower slider 502. The end is forced by a torsion spring 504, and the distance between the two sliders is controlled by a fastening screw 506 at the front end. By rotating the fastening screw 506, the length of the fastening screw 506 screwed into the threaded base 505 is increased or decreased, so as to increase or decrease the distance between the upper slider 501 and the lower slider 502 at the front end. The whole takes the rotating rod 503 as the axis to change the included angle between the upper slider 502 and the lower slider 502, thereby adjusting the angle of the product groove. Both the upper correction mold 4 and the lower correction mold 5 are adjusted to ensure the fitting of the two upper sliders 501. The metal part 101 is pressed upward to make it warp according to the actual downward deformation angle of the metal, and finally the two are neutralized so that the metal part 101 and the product 1 are kept horizontal, improving the qualified rate of product output.

[0025] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0026] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A secondary injection molding shrinkage correction device, comprising a product (1), characterized in that: A metal part (101) is arranged on one side of the product (1), an upper mold (2) is arranged above the product (1), a lower mold (3) is arranged below the product (1), an upper correction mold (4) is arranged above the metal part (101), and a lower correction mold (5) is arranged below the metal part (101), the upper correction mold (4) and the lower correction mold (5) are spliced ​​by an upper slider (501) and a lower slider (502), a product groove is opened on the top of the upper slider (501), a rotating rod (503) is arranged at the bottom of the upper slider (501), a torque spring (504) is sleeved on the surface of the rotating rod (503), a threaded base (505) is arranged at the front end of the lower slider (502), and a fastening screw (506) is rotatably installed at the center of the threaded base (505).

2. A secondary injection molding shrinkage correction device according to claim 1, characterized in that: A deformation gap is left between the upper slider (501) and the lower slider (502), and a deformation gap is required to be left at the contact positions between the upper correction die (4), the lower correction die (5) and the product (1).

3. A secondary injection molding shrinkage correction device according to claim 1, characterized in that: The top surface of the fastening screw (506) is provided with scale lines, and the scale line values ​​of the upper correction mold (4) and the lower correction mold (5) need to be opposite.

4. A secondary injection molding shrinkage correction device according to claim 1, characterized in that: The pressing force between the upper correction die (4) and the lower correction die (5) cannot be too large.

5. The secondary injection molding shrinkage correction device according to claim 1, characterized in that: The top of the fastening screw (506) passes through the upper sliding block (501), and a fixing ring (507) is fixedly connected to the center of the fastening screw (506).

6. A secondary injection molding shrinkage correction device according to claim 5, characterized in that: The fixing ring (507) is embedded in the upper sliding block (501), and an adjusting slot is provided on the top of the fastening screw (506).

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