A hardness testing device for injection molded parts

Abstract

The present invention discloses a device for testing the hardness of injection molded parts, comprising a fixed base, a detachable lower pressure head, a pressure head locking block, a locking screw, and a pressure head fixing plate; one end of the pressure head fixing plate is fixedly connected to a press machine, and the pressure head fixing plate is connected and fixed to the pressure head locking block by a locking screw; a verticality adjustment structure is provided between the pressure head locking block and the pressure head fixing plate; the detachable lower pressure head is connected and fixed to the pressure head locking block, and the injection molded part to be tested is placed on the fixed base and corresponds to the detachable lower pressure head. With the support of a certain downward pressure, an indentation is left on the surface of the injection molded part to be tested on the fixed base, and the overall hardness of the injection molded part to be tested is reflected by testing the diameter of the indentation left on the surface of the injection molded part. The present invention can realize the testing and control of the hardness of the injection molded part through a simple action principle, and can control the strength of the injection molded part at the feeding end, thereby avoiding large-scale defects in the finished product stage and causing waste.

Description

Technical Field

[0001] The invention relates to the field of injection molding product molding conditions and quality monitoring, in particular to an injection molded part hardness testing device. Background Art

[0002] With the increasing maturity of injection molding technology, people's requirements for the product quality and use of injection molded parts are also constantly increasing. For products with high requirements for the hardness of injection molded parts, it is impossible to judge whether the injection molding conditions have changed by appearance means, and whether the hardness index of mass-produced products can always meet the use requirements. In order to avoid economic losses caused by product quality problems, an injection molded part hardness testing device is designed to test and control the hardness of injection molded products. Summary of the invention

[0003] The purpose of the present invention is to provide an injection molded part hardness testing device, which can simply and efficiently test and monitor the hardness of injection molded products to ensure the stability of the injection molded part hardness index.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is:

[0005] A device for testing the hardness of injection molded parts comprises a fixed base, a detachable lower pressure head, a pressure head locking block, a locking screw, and a pressure head fixing plate; one end of the pressure head fixing plate is fixedly connected to a press, and the pressure head fixing plate is connected and fixed to the pressure head locking block by a locking screw; a verticality adjustment structure is provided between the pressure head locking block and the pressure head fixing plate; the detachable lower pressure head is connected and fixed to the pressure head locking block, and the injection molded part to be tested is placed on the fixed base and corresponds to the detachable lower pressure head.

[0006] Preferably, the fixed base has good flatness and fits smoothly with the mating surface of the injection molded part, and is used to fix and support the object to be measured.

[0007] Preferably, the detachable lower pressure head is fixedly connected to the pressure head locking block, the top of the pressure head is spherical or conical, and the indentation left by the pressure head on the surface of the injection molded part will be in a certain proportional relationship with the pressure; the pressure head can be disassembled and replaced according to different material structures or pressure head wear, and the test error caused by the pressure head wear can also be avoided.

[0008] Preferably, one side of the pressure head locking block is used to connect and fix the detachable lower pressure head, and the other side is connected and fixed to the pressure head fixing plate by a locking screw. The verticality of the detachable lower pressure head and the plane of the injection molded part to be measured can be adjusted by the depth of the locking screw.

[0009] The beneficial effects of the present invention are:

[0010] The present invention can simply and efficiently test the hardness of injection molded parts and realize quality monitoring of the hardness of injection molded products. The device has a simple structure and action principle, is low in cost, and the parts are easy to produce and assemble. It can avoid batch waste of injection molded products due to variations in molding conditions, thereby reducing production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The figure is the overall structural diagram of the invention.

[0012] Figure 2 It is a front view of the invention. DETAILED DESCRIPTION

[0013] The following is combined with Figure 1 , 2 The present invention will be described in detail with reference to the accompanying drawings.

[0014] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the invention shown in the drawings and simplified descriptions. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0015] A device for testing the hardness of injection molded parts comprises a fixed base 1, a detachable lower pressure head 2, a pressure head locking block 3, a locking screw 4, and a pressure head fixing plate 5; one end of the pressure head fixing plate 5 is fixedly connected to a press, and the pressure head fixing plate 5 is connected and fixed to the pressure head locking block 3 by means of a locking screw 4; a verticality adjustment structure is provided between the pressure head locking block 3 and the pressure head fixing plate 5; the detachable lower pressure head 2 is connected and fixed to the pressure head locking block 3, and the injection molded part to be tested is placed on the fixed base 1 and corresponds to the detachable lower pressure head 2.

[0016] The fixed base 1 has good flatness and fits evenly with the mating surface of the injection molded part, and is used to fix and support the object to be measured.

[0017] The detachable lower pressure head 2 is fixedly connected to the pressure head locking block 3. The top of the pressure head is spherical or conical. The indentation left by the pressure head on the surface of the injection molded part will be in a certain proportional relationship with the pressure. The pressure head can be disassembled and replaced according to different material structures or pressure head wear, and the test error caused by pressure head wear can also be avoided.

[0018] One side of the pressure head locking block 3 is used to connect and fix the detachable lower pressure head 2, and the other side is connected and fixed to the pressure head fixing plate 5 through a locking screw 4. The verticality of the detachable lower pressure head 2 and the plane of the injection molded part to be measured can be adjusted by the depth of the locking screw 4.

[0019] One end of the ram fixing plate 5 is fixedly connected to the press, and the movement of the press drives the entire pressing device to move. A verticality adjustment structure is provided between the ram locking block 3 to adjust the verticality between the ram and the surface of the injection molded part being tested.

[0020] The verticality adjustment structure adopts a spherical body, and a pit for accommodating the spherical body is provided on the corresponding surfaces of the pressure head fixing plate 5 and the pressure head locking block 3, and the spherical body is made of metal.

[0021] After applying a certain pressure, the press machine measures the diameter of the indentation produced by the detachable lower pressure head 2 on the surface of the tested injection molded part to reflect the hardness of the injection molded part; under the same pressure test, the diameter of the indentation produced by different injection molded products or different test positions is compared to achieve the test of the hardness of the injection molded part.

[0022] like Figure 2 As shown, a spherical inclination adjustment structure is provided between the pressure head fixing plate 5 and the pressure head locking block 3, which is used to correct the inclination error caused by manufacturing or assembly, ensure the verticality between the detachable pressure head 2 and the surface of the injection molded part to be tested during the pressure test, and thus reduce the test error. The inclination angle can be adjusted by adjusting the locking screw 4. The injection molded part to be tested is fixedly placed on the fixed base 1, which has good flatness and can fit the mating surface of the injection molded part flatly, and is used to fix and support the object to be tested to ensure stable testing.

[0023] The technical principle of the present invention is described above in conjunction with specific embodiments. These descriptions are only for explaining the principle of the present invention and cannot be interpreted as limiting the scope of protection of the present invention in any way. Based on the explanations herein, those skilled in the art can associate other specific implementations of the present invention without paying creative labor, and these methods will fall within the scope of protection of the present invention.

Claims

1. An injection molded part hardness testing device, characterized in that: A fixed base (1), a detachable lower pressure head (2), a pressure head locking block (3), a locking screw (4), and a pressure head fixing plate (5); one end of the pressure head fixing plate (5) is fixedly connected to the press, and the pressure head fixing plate (5) is connected and fixed to the pressure head locking block (3) by means of a locking screw (4); a vertical adjustment structure is provided between the pressure head locking block (3) and the pressure head fixing plate (5); the detachable lower pressure head (2) is connected and fixed to the pressure head locking block (3), and the injection molded part to be tested is placed on the fixed base (1) and corresponds to the detachable lower pressure head (2); the fixed base (1) has good flatness and fits the mating surface of the injection molded part flatly and closely, and is used to fix and support the object to be tested; the detachable lower pressure head (2) is fixedly connected to the pressure head locking block (3), the top of the pressure head is spherical or conical, and the indentation left by the pressure head on the surface of the injection molded part will be in a certain proportional relationship with the pressure; the pressure head can be disassembled and replaced according to different material structures or pressure head wear, and the test error caused by pressure head wear can also be avoided; One side of the pressure head locking block (3) is used to connect and fix the detachable lower pressure head (2), and the other side is connected and fixed to the pressure head fixing plate (5) through a locking screw (4). The verticality between the detachable lower pressure head (2) and the plane of the injection molded part to be tested can be adjusted by the height of the screwing depth of the locking screw (4). One end of the pressure head fixing plate (5) is fixed to the press machine, and the movement of the press machine drives the entire pressing device to move. A verticality adjustment structure is provided between the pressure head locking block (3) and the pressure head locking block (3) for adjusting the verticality between the lower pressure head and the surface of the injection molded part to be tested. The verticality adjustment structure adopts a spherical body, and a pit for accommodating the spherical body is provided on the corresponding surfaces of the pressure head fixing plate (5) and the pressure head locking block (3). The spherical body is made of metal. After applying a certain pressure, the press machine measures the diameter of the indentation produced by the detachable lower pressure head (2) on the surface of the injection molded part to be tested to reflect the hardness of the injection molded part. Under the same pressure test, the diameter of the indentation produced by different injection molded products or different test positions is compared to achieve the test of the hardness of the injection molded part.

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