Angular position supporting compensation mechanism for demolding of injection molding part

Abstract

The utility model provides an angular position support compensation mechanism for demoulding an injection molded part, which belongs to the technical field of molding production of injection molded parts and comprises an outer shell and an inner shell, the inner shell is mounted on the outer shell; a power unit, a supporting unit and a rotary connecting unit are mounted on the inner shell; the power unit is installed in the inner shell and used for providing power for the supporting unit. The supporting unit is installed on the power unit and used for supporting the interior of the injection molding part and preventing inward shrinkage deformation caused by cooling. The rotary connecting unit is installed on the upper surface of the inner shell and used for connecting the supporting unit and the inner shell. According to the angular position supporting compensation mechanism for demolding of the injection molded part, the supporting performance is effectively improved through mutual matching of the power unit and the supporting unit, and the problem of deformation of a cooling corner of the injection molded part is solved.

Description

Technical Field

[0001] This utility model relates to the field of injection molding production technology, and in particular to a corner support compensation mechanism for demolding injection molded parts. Background Technology

[0002] In the field of injection molding production technology, the demolding process is crucial, directly affecting product quality and production efficiency. As the application range of plastic products continues to expand, the requirements for the precision and appearance quality of injection molded parts are constantly increasing. However, after molding in the mold, due to their complex structure, especially those with corner structures, injection molded parts are prone to defects such as deformation and concavity at the corners during demolding. This is because when the corner areas are naturally cooled at room temperature after demolding, the thermal expansion and contraction characteristics of the plastic material and the uneven heat dissipation caused by the corner geometry create a temperature gradient inside the injection molded part, generating shrinkage stress. However, ordinary demolding ejection mechanisms are insufficient to provide stable and uniform support at the corners. For example, for some injection molded parts with right angles or acute edges, the demolding resistance at the corners is concentrated at the moment of demolding. If the support is insufficient, the plastic material at the corners is easily concave inward, causing deformation of the injection molded part and resulting in defective products. Utility Model Content

[0003] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a corner support compensation mechanism for demolding injection molded parts. By cooperating with the power unit and the support unit, the support is effectively improved, and the problem of corner deformation during cooling of injection molded parts is improved.

[0004] To achieve the above objectives, this utility model provides the following solution: a corner support compensation mechanism for demolding injection molded parts, comprising an outer shell and an inner shell; the inner shell is mounted on the outer shell; a power unit, a support unit, and a rotary connection unit are mounted on the inner shell; the power unit is installed inside the inner shell and is used to provide power to the support unit; the support unit is mounted on the power unit and is used to support the interior of the injection molded part to prevent inward shrinkage and deformation due to cooling; the rotary connection unit is mounted on the upper surface of the inner shell and is used to connect the support unit and the inner shell.

[0005] Preferably, the inner housing is installed inside the outer housing; the groove formed by the outer surface of the inner housing, the inner surface of the outer housing, and the upper bottom surface of the outer housing is a limiting groove, the width of which matches the bottom edge dimension of the injection molded part, and is used to limit the position of the injection molded part and prevent the injection molded part from shifting during the cooling process.

[0006] Preferably, the power unit is installed inside the inner housing; the power unit includes two small motors, which are symmetrically installed on the inner surface of the inner housing; the output shafts of the two small motors are coaxially connected to power arms; the two small motors respectively provide power to the support unit through the corresponding power arms.

[0007] Preferably, the support unit is installed on the end of the power arm away from the corresponding small motor. The support unit includes two sets of symmetrically arranged spreading rods. Each set of spreading rods is V-shaped, and the bottom of the V-shaped spreading rod is rotatably connected to the power arm.

[0008] Preferably, each set of the expansion rods has a base rotatably connected to its V-shaped top. The base is connected to the other end of the expansion rod and fixedly connected to the corresponding support plate. The base is symmetrically installed on the inner surface edge of the expansion rod. The support plate completes the support function through the cooperation between the expansion rod and the base.

[0009] Preferably, the rotating connection unit is installed on the inner housing; the rotating connection unit includes several sets of hinge pins; the several sets of hinge pins are evenly arranged at the connection between the inner housing and the support plate, and are connected to the side of the support plate opposite to the inner surface of the inner housing, for realizing the opening and closing of the support plate.

[0010] According to the specific embodiments provided by this utility model, the following technical effects are disclosed:

[0011] This invention uses a limiting groove formed by the outer shell and inner shell to position the bottom edge of the injection molded part, preventing displacement during cooling. Simultaneously, a small motor drives a power arm in conjunction with a V-shaped expansion rod, causing a support plate to unfold around a hinge pin and fit against the inner wall of the corner of the injection molded part. During cooling, this continuously provides outward support to counteract corner shrinkage stress, effectively preventing deformation caused by corner concavity after demolding. The symmetrical power arm and support unit ensure even distribution of support force, improving support stability. Combined with a limiting design adaptable to the bottom edge size of the injection molded part, this enhances the mechanism's applicability to injection molded parts of different specifications, significantly improving molding accuracy and production yield, and solving the problem of insufficient corner support in existing technologies. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 Overall structural diagram provided for embodiments of this utility model;

[0014] Figure 2 Internal structure diagram of the inner shell provided in this embodiment of the utility model;

[0015] Figure 3 A partial enlarged view of the interior of the inner shell provided in an embodiment of this utility model;

[0016] Figure 4 This is an assembly drawing of the injection molded part provided for an embodiment of the present utility model.

[0017] Explanation of reference numerals in the attached figures:

[0018] 1. Outer shell; 2. Limiting groove; 3. Injection molded part; 4. Inner shell; 5. Hinge pin; 6. Support plate; 7. Small motor; 8. Power arm; 9. Spreading rod; 10. Base. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figure 1 As shown, this utility model provides a corner support compensation mechanism for demolding injection molded parts, including: an outer shell and an inner shell; the inner shell is mounted on the outer shell; a power unit, a support unit, and a rotary connection unit are mounted on the inner shell; the power unit is installed inside the inner shell and is used to provide power to the support unit; the support unit is mounted on the power unit and is used to support the inside of the injection molded part to prevent inward shrinkage and deformation due to cooling; the rotary connection unit is mounted on the upper surface of the inner shell and is used to connect the support unit and the inner shell.

[0022] like Figure 2 , Figure 3As shown, a pair of support plates 6 and a rotary connection unit are symmetrically installed on the upper surface of the inner shell 4. The rotary connection unit includes several sets of hinge pins 5. The support plates 6 are rotatably connected to the corresponding hinge pins 5, and the support plates 6 are connected to the inner shell 4 through the hinge pins 5. Bases 10 are fixedly installed on both sides of the inner surface of the two support plates 6. The bases 10 are relatively fixedly installed on the other end of the support plates 6 and are rotatably connected to the expansion rods 9. The four expansion rods 9 are divided into two groups. Each group of expansion rods is symmetrically distributed in a V-shape on both sides of the inner shell 4. The bottom of each group of V-shaped expansion rods is rotatably connected to the power arm 8. The other end of each power arm 8 is coaxially connected to the end of the output shaft of the small motor 7. Each small motor 7 is installed on the inner surface of both ends of the inner shell 4.

[0023] like Figure 4 As shown, the inner shell 4 is installed on the bottom upper surface of the inner shell 1; the groove formed by the outer surface of the inner shell 4, the inner surface of the outer shell 1, and the bottom upper surface of the outer shell 1 is the limiting groove 2. The width of the limiting groove 2 matches the bottom edge size of the injection molded part 3, which is used to limit the position of the injection molded part 3 and prevent the injection molded part 3 from being displaced during the cooling process.

[0024] Working principle: In use, the bottom edge of the injection molded part 3 is first placed into the limiting groove 2 formed by the outer shell 1 and the inner shell 4. The limiting groove 2 matches the bottom edge size of the injection molded part 3 to limit its position and prevent displacement during cooling. Then, the two symmetrical small motors 7 inside the inner shell 4 are started. The output shaft of the motor drives the power arm 8 to rotate, causing the bottom of the V-shaped support rod 9 connected to the power arm 8 to move outward. The top of the support rod 9 pushes the support plate 6 to rotate around the hinge pin 5 on the inner shell 4 through the base 10 until the support plate 6 fits against the inner wall of the corner of the injection molded part 3. During the cooling process of the injection molded part 3, the support plate 6 continuously provides outward support force through the linkage between the support rod 9 and the power arm 8 to counteract the inward shrinkage stress at the corner and avoid deformation. After cooling is completed, the motor rotates in the opposite direction, the power arm 8 drives the support rod 9 to retract, the support plate 6 falls back to the initial state, and then the molded injection molded part 3 is taken out.

[0025] Therefore, by adopting the aforementioned corner support compensation mechanism for demolding injection molded parts, the support is effectively improved through the cooperation of the power unit and the support unit, thus mitigating the problem of corner deformation during cooling of injection molded parts.

[0026] This document uses specific examples to illustrate the principles and implementation methods of this utility model. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this utility model. Furthermore, those skilled in the art will recognize that, based on the ideas of this utility model, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. An angular position support compensation mechanism for ejection of an injection molded part, characterized by, The utility model relates to a kind of injection molding support device, including: Outer shell and inner shell;The inner shell is mounted on outer shell;Power unit, support unit and rotary connection unit are installed on the inner shell;The power unit is installed inside the inner shell, for providing power to the support unit;The support unit is installed on the power unit, for supporting inside injection molding part, prevent cooling to contract deformation inward;Rotary connection unit is installed on the upper surface of the inner shell, for connecting the support unit and the inner shell.

2. The angular position support compensation mechanism for demolding of an injection molded part according to claim 1, characterized in that The inner shell is installed inside the outer shell;The outer surface of the inner shell and the inner surface of the outer shell and the recess formed on the upper surface of the bottom of the outer shell are limit slot, the width of the limit slot matches the bottom edge size of injection molding part, for limiting injection molding part position, prevent displacement during cooling work.

3. The angular position support compensation mechanism for demolding of an injection molded part according to claim 1, characterized in that, The power unit is installed on the inner side of the inner shell;The power unit includes two small motors, and the two small motors are symmetrically installed on the inner surface of the inner shell;The output shaft end of the two small motors is coaxially connected with power arm, and the two small motors provide power to the support unit through corresponding power arm.

4. The angular position support compensation mechanism for demolding of an injection molded part according to claim 3, characterized in that The support unit is installed on the end of the power arm away from the corresponding small motor, and the support unit includes two groups of symmetrically arranged support rods;Each group of support rods is V-shaped, and the bottom of the V-shaped support rod is rotationally connected with the power arm.

5. The angular position support compensation mechanism for demolding of an injection molded part according to claim 4, characterized in that The V-shaped top of each group of support rods is rotationally connected with a base, and the base is connected to the other end of the support rod and fixedly connected to the corresponding support plate, and the base is symmetrically installed on the inner surface edge of the support rod;The support plate and the base are matched to complete the supporting action through the support rod.

6. The angular position support compensation mechanism for demolding of an injection molded part according to claim 5, characterized in that The rotary connection unit is installed on the inner shell;The rotary connection unit includes a plurality of hinge pins;A plurality of hinge pins are evenly arranged at the connection between the inner shell and the support plate, and are connected to the support plate on the side of the inner surface of the inner shell, for realizing the opening and closing of the support plate.

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