Friction coefficient testing device for injection molding product

Abstract

The utility model relates to the technical field of friction testing, and discloses a friction coefficient testing device for injection molding products, which comprises a friction coefficient tester and a test placing plate mounted in the middle of the top of the friction coefficient tester, and sliding plates are fixedly connected to two sides of the top of the friction coefficient tester. According to the utility model, during testing, the U-shaped pressing plate is rotated, pressed and fixed on one side of the mouse pad, then the pull handle is pulled, the U-shaped sliding rod is triggered to drive the linkage assembly to slide, and the smoothing block automatically falls to be attached to the surface at a specific position by utilizing the mechanical cooperation of the spring and the guide rod, so that the mouse pad is flattened, and the test efficiency is improved. And when the U-shaped sliding rod abuts against the limiting position, the smoothing block and the U-shaped lower pressing plate form bidirectional elastic clamping, finally, a test weight is hung according to needs, a friction test is driven by a traction sensor, data are displayed on a tester in real time, and the accuracy and reliability of the friction coefficient test of the injection molding mouse pad are remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of friction test, concretely to a friction coefficient testing device for injection molding product. BACKGROUND

[0002] Friction coefficient as the key parameter of measuring the friction characteristic of object surface is the ratio of friction force and vertical force between two surfaces, is mainly influenced by surface roughness and is irrelevant to contact area, covers two types of dynamic and static friction coefficient, and its value needs to be obtained through friction coefficient test, according to the test principle, friction coefficient tester is divided into three types of pendulum type, testing machine and plane type, the plane type friction coefficient instrument is widely applied in many fields owing to high precision and convenience, and the plane type friction coefficient instrument includes injection molding product mouse pad, and the friction coefficient of injection molding product mouse pad is related to the smoothness and accuracy of mouse control, and the friction performance of injection molding product mouse pad can be accurately determined through the plane type friction coefficient instrument, thereby providing important basis for product quality control and optimization of production process.

[0003] However, when the existing part of plane type friction coefficient instrument tests injection molding product mouse pad, only one end of the test sample is fixed, when the surface of injection molding product mouse pad has wrinkle, the instrument cannot straighten it, local stress change is caused in the wrinkle area during the test, the friction force measurement value deviates from the true situation, and then the accuracy of test result is seriously affected.In addition, the material characteristics of injection molding product mouse pad make it difficult to recover after wrinkle, and the fixing mode of the existing instrument cannot overcome this problem, so that the plane type friction coefficient instrument has significant use limitation in the friction coefficient test of injection molding product mouse pad, and cannot meet the high-precision test demand. UTILITY MODEL CONTENTS

[0004] In view of the defects of the prior art, the utility model provides a friction coefficient testing device for injection molding product, has the advantages of flat fixing, solves the problem that the existing plane type friction coefficient instrument only fixes one end of injection molding product mouse pad, cannot straighten the mouse pad when it has wrinkle, the friction force measurement value is distorted, and cannot meet the high-precision test demand.

[0005] To achieve the above purpose of flat fixed, the utility model provides technical schemes as follows: including friction coefficient tester and the test placement plate installed in the top middle part of friction coefficient tester, the both sides of the top of friction coefficient tester are fixedly connected with sliding plates, the top of two sliding plates is penetrated and is slidingly connected with U type slide bar, the both sides of the bottom of U type slide bar are fixedly connected with two groups of connecting blocks, the inside of a group of connecting blocks is equipped with spring slot, the inner chamber top of spring slot is fixedly connected with spring, the side of spring away from spring slot is fixedly connected with limit connecting rod, and limit connecting rod penetrates connecting block and is slidingly connected, the end of limit connecting rod away from connecting block is fixedly connected with smoothing block, the top of friction coefficient tester is fixedly connected with support block, the top of support block is penetrated and is slidingly connected with pull rod, and one end of pull rod is fixedly connected with U type slide bar, the end of pull rod away from U type slide bar is fixedly connected with pull handle, the both sides of the top of friction coefficient tester close to support block are fixedly connected with support rod, the top of two support rods is fixedly connected with guide rod, and one end of guide rod penetrates spring, and the top of two guide rods is equipped with slide groove.

[0006] As the further scheme of the utility model: the side of the top of friction coefficient tester close to support block is fixedly connected with U-shaped connecting rod, the bottom of U-shaped connecting rod is penetrated and is slidingly connected with U-shaped down plate, the middle part of U-shaped connecting rod is penetrated and is rotatably connected with U-shaped down plate, and the outer wall threaded part of U-shaped down plate is penetrated and is threadedly connected with threaded rod, the top of threaded rod is fixedly connected with rotating handle.

[0007] As the further scheme of the utility model: the middle part of the side of the top of friction coefficient tester close to U-shaped connecting rod is installed with traction sensor, and one side of traction sensor is provided with traction rope.

[0008] As the further scheme of the utility model: the side of traction rope away from traction sensor is installed with test weight, and test weight slides on test placement plate.

[0009] Compared with the prior art, the utility model has the advantages of:

[0010] In the utility model, during testing, first, the side of the mouse pad is fixed by rotating the U-shaped down plate, then the pull handle is pulled, triggering the U-shaped slide bar to drive the linkage assembly to slide, the spring and the guide rod are mechanically matched to make the smoothing block automatically fall and adhere to the surface at a specific position, the wrinkles are smoothed accurately during the sliding process, when the U-shaped slide bar reaches the limit position, the smoothing block and the U-shaped down plate form a bidirectional elastic clamping, finally, the test weight is hung as needed, the friction test is driven by the traction sensor, and the data is displayed on the tester in real time, which significantly improves the accuracy and reliability of the injection mouse pad friction coefficient test. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is the three-dimensional structure schematic diagram of the utility model.

[0012] Figure 2 It is the U-shaped connecting rod of the utility model,

[0013] Figure 3 It is the U-shaped connecting rod of the utility model, Figure 2 The enlarged view of A in the middle.

[0014] In the figure: 1, friction coefficient tester; 2, test placement plate; 3, sliding plate; 4, U-shaped slide rod; 5, connecting block; 6, spring groove; 7, spring; 8, limiting connecting rod; 9, straightening block; 10, supporting block; 11, pull rod; 12, pull handle; 13, supporting rod; 14, guide rod; 15, lower sliding groove; 16, U-shaped connecting rod; 17, U-shaped lower pressing plate; 18, rotating handle; 19, threaded rod; 20, traction sensor; 21, traction rope; 22, test weight. DETAILED DESCRIPTION

[0015] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to 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 the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0016] Please refer to Figures 1 to 3The utility model discloses a kind of friction coefficient testing devices for injection molding product, including friction coefficient tester 1 and the test placement plate 2 of friction coefficient tester 1 top middle installation, the top both sides of friction coefficient tester 1 are fixedly connected with sliding plate 3, the top of two sliding plates 3 is penetrated and is slidably connected with U type slide bar 4, the bottom both sides of U type slide bar 4 are fixedly connected with two groups of connecting blocks 5, spring slot 6 is formed in the inside of a group of connecting blocks 5, spring 7 is fixedly connected in the inner chamber top of spring slot 6, spring 7 is fixedly connected with limit connecting rod 8 on the side away from spring slot 6, and limit connecting rod 8 is penetrated and is slidably connected with connecting block 5, limit connecting rod 8 is fixedly connected with the flatting block 9 on the end away from connecting block 5, hold pull handle 12 and pull back, U type slide bar 4 is driven in sliding plate 3 by pull rod 11, U type slide bar 4 moves in the process, synchronously drive connecting block 5, limit connecting rod 8 and flatting block 9 whole displacement, the top of friction coefficient tester 1 is fixedly connected with support block 10, pull rod 11 is penetrated and is slidably connected with the top of support block 10, and one end of pull rod 11 is fixedly connected with U type slide bar 4, pull rod 11 is fixedly connected with pull handle 12 on the end away from U type slide bar 4, the top of support block 10 is fixedly connected with support rod 13 on the both sides close to friction coefficient tester 1, the top of two support rods 13 is fixedly connected with guide rod 14, and one end of guide rod 14 is penetrated spring 7, the top of two guide rods 14 is formed with slide groove 15, along with U type slide bar 4 continuous sliding, limit connecting rod 8 is moved along the top end of guide rod 14, when sliding to the slide groove 15 position of the top of guide rod 14, the elastic potential energy of spring 7 is released momentarily, limit connecting rod 8 and flatting block 9 are pushed and fall vertically, after flatting block 9 is gently attached mouse pad surface, continue to push U type slide bar 4, drive whole assembly and slowly go forward, so that flatting block 9 carefully smooth mouse pad surface wrinkle.

[0017] The side of the top management support block 10 of the friction coefficient tester 1 is fixedly connected with a U-shaped connecting rod 16, the bottom of the U-shaped connecting rod 16 is penetratingly and slidingly connected with a U-shaped lower pressing plate 17, the middle part of the U-shaped connecting rod 16 is penetratingly and rotationally connected with the U-shaped lower pressing plate 17, and the outer wall of the U-shaped lower pressing plate 17 is penetratingly and threadedly connected with a threaded rod 19, the top of the threaded rod 19 is fixedly connected with a rotating handle 18, during the test operation, the mouse pad is first placed on the top surface of the test placing plate 2, then the rotating handle 18 is rotated clockwise, the threaded rod 19 is driven to rotate, along with the rotation of the threaded rod 19, the U-shaped lower pressing plate 17 connected with the outer wall thread of the threaded rod 19 stably moves downwards, and the mouse pad is firmly extruded and fixed on one side, a traction sensor 20 is installed on the top of the friction coefficient tester 1 and close to the middle part of the side of the U-shaped connecting rod 16, the traction sensor 20 is provided with a traction rope 21 on one side, the traction rope 21 is installed with test weights 22 away from the traction sensor 20, and the test weights 22 slide on the test placing plate 2, the end of the traction rope 21 away from the traction sensor 20 is connected with test weights 22 of different weights as required.

[0018] The working principle of the utility model is: during the test operation, the mouse pad is first placed on the top surface of the test placing plate 2, then the rotating handle 18 is rotated clockwise, the threaded rod 19 is driven to rotate, along with the rotation of the threaded rod 19, the U-shaped lower pressing plate 17 connected with the outer wall thread of the threaded rod 19 stably moves downwards, and the mouse pad is firmly extruded and fixed on one side, after the unilateral fixing is completed, the pull handle 12 is held and pulled back, the U-shaped slide rod 4 is driven to slide smoothly in the sliding plate 3 through the pull rod 11, in the moving process of the U-shaped slide rod 4, the connecting block 5, the limiting connecting rod 8 and the smoothing block 9 are synchronously driven to displace integrally, at this time, the smoothing block 9 keeps a suspended state and does not touch the surface of the mouse pad, along with the continuous sliding of the U-shaped slide rod 4, the limiting connecting rod 8 moves forward along the top end of the guide rod 14, when sliding to the lower sliding groove 15 position of the top of the guide rod 14, the elastic potential energy accumulated in the spring 7 is released instantaneously, the limiting connecting rod 8 and the smoothing block 9 are pushed to fall vertically, after the smoothing block 9 gently adheres to the surface of the mouse pad, the U-shaped slide rod 4 is continuously pushed, the whole set of components are driven to move forward slowly, the smoothing block 9 carefully smooths the wrinkles on the surface of the mouse pad, until the U-shaped slide rod 4 stops sliding when touching the limiting position of the inner wall of the sliding plate 3, at this time, the smoothing block 9 is just located at the two ends of the mouse pad not clamped by the U-shaped lower pressing plate 17, the spring 7 is relied on to rebound, the limiting connecting rod 8 and the smoothing block 9 realize the bidirectional elastic clamping of the mouse pad;

[0019] Finally, the traction rope 21 is connected with different weight test weights 22 away from one end of the traction sensor 20. Turn on the friction coefficient tester 1, start the traction sensor 20, slowly pull the weight along with the traction rope 21, the mouse pad surface starts to generate friction, and the friction coefficient data is displayed on the display screen of the friction coefficient tester 1 in real time during the test, which is convenient for accurate reading and recording.

[0020] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A friction coefficient testing device for injection molded products, comprising a friction coefficient tester (1) and a test placement plate (2) mounted on the top center of the friction coefficient tester (1), characterized in that: The friction coefficient tester (1) has two slide plates (3) fixedly connected to its top. A U-shaped slide rod (4) is slidably connected through the top of each slide plate (3). Two sets of connecting blocks (5) are fixedly connected to the bottom of each U-shaped slide rod (4). A spring groove (6) is provided inside each set of connecting blocks (5). A spring (7) is fixedly connected to the top of the inner cavity of the spring groove (6). A limiting connecting rod (8) is fixedly connected to the side of the spring (7) away from the spring groove (6), and the limiting connecting rod (8) passes through the connecting block (5) and is slidably connected. A smoothing block (9) is fixedly connected to the end of the limiting connecting rod (8) away from the connecting block (5). A support block (10) is fixedly connected to the top of the friction coefficient tester (1). A pull rod (11) is slidably connected through the top of the support block (10). One end of the pull rod (11) is fixedly connected to a U-shaped slide rod (4). A handle (12) is fixedly connected to the end of the pull rod (11) away from the U-shaped slide rod (4). Support rods (13) are fixedly connected to both sides of the top of the friction coefficient tester (1) near the support block (10). Guide rods (14) are fixedly connected to the top of both support rods (13). A spring (7) passes through one end of the guide rod (14). A sliding groove (15) is opened on the top of both guide rods (14).

2. The friction coefficient testing device for injection molded products according to claim 1, characterized in that: A U-shaped connecting rod (16) is fixedly connected to one side of the top management support block (10) of the friction coefficient tester (1). A U-shaped lower pressure plate (17) is slidably connected through the bottom of the U-shaped connecting rod (16). A U-shaped lower pressure plate (17) is rotatably connected through the middle of the U-shaped connecting rod (16). The threaded part of the outer wall of the U-shaped lower pressure plate (17) passes through the threaded rod (19) and is threadedly connected. A rotating handle (18) is fixedly connected to the top of the threaded rod (19).

3. The friction coefficient testing device for injection molded products according to claim 1, characterized in that: A traction sensor (20) is installed on the middle of the side of the friction coefficient tester (1) near the U-shaped connecting rod (16), and a traction rope (21) is provided on one side of the traction sensor (20).

4. The friction coefficient testing device for injection molded products according to claim 3, characterized in that: A test weight (22) is installed on the side of the traction rope (21) away from the traction sensor (20), and the test weight (22) slides on the test placement plate (2).

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