CN214384556U

CN214384556U - PUR hot melt adhesive tensile testing machine

Info

Publication number: CN214384556U
Application number: CN202120485157.3U
Authority: CN
Inventors: 陈伟民; 缪益新; 黄东波
Original assignee: Dongguan Juli Innovative Materials Technology Co ltd
Current assignee: Dongguan Juli Innovative Materials Technology Co ltd
Priority date: 2021-03-06
Filing date: 2021-03-06
Publication date: 2021-10-12
Anticipated expiration: 2031-03-06

Abstract

The application relates to the technical field of hot melt adhesive viscosity testing equipment, in particular to a PUR hot melt adhesive tensile testing machine, which comprises a machine body, wherein a clamp is arranged on the machine body; the clamp comprises a fixed seat, the fixed seat is connected with two clamping blocks for clamping and fixing a workpiece to be tested, and the two clamping blocks are respectively connected with the fixed seat in a sliding manner; the fixing seat is rotatably connected with a bidirectional screw rod, and the two clamping blocks are respectively sleeved at two ends of the bidirectional screw rod with opposite screw threads and are in threaded connection with the bidirectional screw rod. The two clamping blocks are driven to be close to or far away from each other through the bidirectional screw rod so as to clamp the workpiece to be tested by the clamp, the bolt does not need to be screwed for operation, and the operation is convenient; and when operating two-way lead screw, the distance that two clamp blocks are close to each other is the same, conveniently fixes a position the work piece that awaits measuring, has increased tensile testing machine's use convenience.

Description

PUR hot melt adhesive tensile testing machine

Technical Field

The application relates to the technical field of hot melt adhesive viscosity test equipment, in particular to a PUR hot melt adhesive tensile testing machine.

Background

PUR hot melt adhesive (polyurethane reactive) is reactive polyurethane hot melt adhesive. The PUR hot melt adhesive does not contain water and a solvent, has the solid content of 100 percent, is a high-performance environment-friendly adhesive, has the characteristics of no solvent, high initial viscosity, quick positioning during assembly and the like of a common hot melt adhesive, and has the water resistance, heat resistance, cold resistance, creep resistance, medium resistance and other properties which are unique to a reactive liquid adhesive.

The PUR hot melt adhesive needs to be tested for the performance before leaving the factory, wherein the testing for the tensile shear strength of the hot melt adhesive is included. The detection of the shearing strength refers to the stress born by a unit adhesive joint when a hot melt adhesive adhered to a product lap joint is damaged under the action of tensile load. The detection of the shear strength of the hot melt adhesive is usually carried out by a vertical tensile test machine.

When the tensile testing machine performs the tensile test, the workpiece to be tested needs to be clamped and fixed and positioned in a vertical state so as to ensure the accuracy of tensile detection data in the vertical direction of the tensile testing machine. At present, the mode of fixing the workpiece to be tested is mainly used for tightening the two ends of the workpiece to be tested respectively through bolts and fixing the workpiece to be tested between an upper clamp and a lower clamp of a tension tester, the bolts of the upper clamp and the lower clamp are required to be operated during replacement, the use is troublesome, the workpiece to be tested is inconvenient to position, and the use convenience of the tension tester is reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve the convenience that tensile testing machine used, this application provides a PUR hot melt adhesive tensile testing machine.

The application provides a PUR hot melt adhesive tensile testing machine adopts following technical scheme:

a PUR hot melt adhesive tensile testing machine comprises a machine body, wherein a clamp is arranged on the machine body; the clamp comprises a fixed seat, the fixed seat is connected with two clamping blocks for clamping and fixing a workpiece to be tested, and the two clamping blocks are respectively connected with the fixed seat in a sliding manner; the fixing seat is rotatably connected with a bidirectional screw rod, and the two clamping blocks are respectively sleeved at two ends of the bidirectional screw rod with opposite screw threads and are in threaded connection with the bidirectional screw rod.

By adopting the technical scheme, when the tensile shear strength of the workpiece to be detected needs to be detected, the bidirectional screw rod is rotated, the two clamping blocks are close to each other under the thread matching action of the bidirectional screw rod so as to clamp and fix the workpiece to be detected or are far away from each other so as to release the clamping state and facilitate the detection of the next workpiece to be detected; the two clamping blocks clamp the workpiece to be detected under the self-locking effect of the bidirectional screw rod, and the two clamping blocks are close to each other at the same distance when the bidirectional screw rod is operated; the setting of two-way lead screw makes operating personnel easy and simple to handle when the installation form of workpiece to be measured and change, and simple structure, has improved the convenience that tensile testing machine used, and practical degree is strong.

Preferably, the bidirectional screw rod is connected with an adjusting component for adjusting the rotation of the bidirectional screw rod.

Through adopting above-mentioned technical scheme, adjusting part adjusts two-way lead screw and rotates, and then adjusts the distance of two tight piece of clamp between two-way lead screw for operating personnel need not the manual two-way lead screw of rotating, convenient operation, and reducible artifical harm to two-way lead screw.

Preferably, the adjusting component comprises a worm wheel and a worm which are matched, the worm wheel is fixedly sleeved on the two-way screw rod, and the worm is rotatably connected with the fixed seat.

Through adopting above-mentioned technical scheme, adjusting part adopts complex worm wheel and worm, when needs make two-way lead screw rotate, twists the worm, and then the worm drives the worm wheel and rotates to because the coaxial fixed cover of worm wheel locates two-way lead screw outside, therefore rotate the regulation to two-way lead screw. The worm wheel and the worm are matched with each other, the structure is compact, and the worm wheel and the worm have self-locking characteristics, so that the bidirectional screw rod can be limited to rotate.

Preferably, one end of the worm, which is far away from the fixed seat, is fixedly connected with a rotating handle.

Through adopting above-mentioned technical scheme, rotatory handle makes things convenient for operating personnel to adjust the rotation of worm, reduces directly to twist the worm and moves, laborsaving and remove the worm and protect.

Preferably, the opposite side surfaces of the two clamping blocks are bent surfaces.

By adopting the technical scheme, the bending surface increases the friction force between the clamping block and the workpiece to be detected, the connection strength between the workpiece to be detected and the clamping block is increased, and the phenomenon that the workpiece to be detected is separated because the clamping block cannot clamp the workpiece to be detected in the detection process is reduced.

Preferably, the clamp comprises an upper clamp and a lower clamp which are arranged in the vertical direction of the machine body; lower anchor clamps and organism fixed connection go up anchor clamps and are connected with the subassembly that slides, and the subassembly that slides includes complex lead screw and screw, screw and last anchor clamps fixed connection, and lead screw connection has the motor, and motor drive goes up anchor clamps and removes in the vertical direction of organism.

Through adopting above-mentioned technical scheme, the motor rotates and then drives the lead screw and rotate, slides from top to bottom with lead screw threaded connection's screw on the axis direction of lead screw, and then drives the anchor clamps and slides, adopts lead screw and screw cooperation as the subassembly that slides of anchor clamps, and the drive is stable.

Preferably, the upper clamp is further connected with a fixing piece matched with the upper clamp to slide.

Through adopting above-mentioned technical scheme, the steadiness piece increases the stability that anchor clamps slided.

Preferably, the fixing piece is a guide rod, the guide rod is fixedly connected with the machine body, and the upper clamp slides on the guide rod.

Through adopting above-mentioned technical scheme, the guide bar is applicable to this application and to the firm when the anchor clamps slide as firm, convenient operation, implements simply.

Preferably, the guide rod is further connected with a limiting block for limiting the sliding distance of the upper clamp in the vertical direction.

Through adopting above-mentioned technical scheme, the stopper carries on spacingly to the distance of sliding of last anchor clamps, reduces the circumstances that collides, the rebound roll-off organism with lower anchor clamps when going up anchor clamps downstream.

In summary, the present application at least includes the following beneficial technical effects:

1. the two clamping blocks are driven to mutually approach or separate from each other through the bidirectional screw rod so as to clamp the workpiece to be tested by the clamp, and the bolt does not need to be screwed for operation, so that the operation is convenient; and when operating two-way lead screw, the distance that two clamp blocks are close to each other is the same, conveniently fixes a position the work piece that awaits measuring, has increased tensile testing machine's use convenience.

2. This application adopts adjusting part to adjust two-way lead screw and rotates, and then adjusts two distance of pressing from both sides tight piece between two-way lead screw for operating personnel need not the manual two-way lead screw of rotating, convenient operation, and reducible artifical harm to two-way lead screw.

3. The opposite side surfaces of the two clamping blocks are bending surfaces, the bending surfaces increase the friction force between the clamping blocks and a workpiece to be measured, and the connection strength between the workpiece to be measured and the clamping blocks is increased.

Drawings

FIG. 1 is a schematic view of the overall structure of a PUR hot melt adhesive tensile testing machine according to the present application;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is a schematic structural view of the tensile testing machine of the present embodiment with the dust cover box and the dust guard hidden.

Description of reference numerals: 1. a body; 10. a control box; 11. a clamp; 1101. an upper clamp; 1102. a lower clamp; 1111. a fixed seat; 1112. a clamping block; 1113. a bidirectional screw rod; 1121. a worm gear; 1122. a worm; 1123. rotating the handle; 1131. a lead screw; 1132. a connecting plate; 1133. connecting blocks; 1134. a dust cover box; 1135. a dust-proof plate; 114. a guide bar; 1141. and a limiting block.

Detailed Description

The present application is described in further detail below with reference to figures 1-3.

The embodiment of the application discloses PUR hot melt adhesive tensile testing machine. Referring to fig. 1, the PUR hot melt adhesive tensile testing machine comprises a machine body 1, wherein the whole machine body 1 is a cuboid horizontally placed. The top surface length direction one side of organism 1 is provided with control box 10, and control box 10 is used for controlling this application tensile test's testing process. A clamp 11 is connected to one side of the top surface of the machine body 1 far away from the control box 10.

Referring to fig. 1 and 2, the clamp 11 includes a fixing seat 1111. The fixing seat 1111 is a long strip with a concave longitudinal section, and the length direction of the fixing seat is parallel to the length direction of the machine body 1. The fixing seat 1111 is connected with a bidirectional screw 1113. The bidirectional screw 1113 is horizontally arranged, and the axis direction is parallel to the length direction of the machine body 1. Two ends of the bidirectional screw 1131 are rotatably connected with the fixing seat 1111. One end of the bidirectional screw 1113 close to the operation box penetrates through the fixed seat 1111, a worm wheel 1121 is coaxially and fixedly sleeved at the end, the worm wheel 1121 is meshed with a worm 1122, and the worm 1122 is vertically placed. The top of worm 1122 passes the fixed block with fixing base 1111 fixed connection, and rotates with fixing base 1111 and be connected, and bottom fixedly connected with rotation handle 1123. When the turning handle 1123 is turned, the worm 1122 rotates, and the worm wheel 1121 engaged with the worm 1122 rotates, so that the bidirectional screw 1113 coaxially and fixedly connected to the worm wheel 1121 rotates. When the worm 1122 stops rotating, the rotation of the bidirectional screw 1113 is restricted due to the self-locking property of the worm 1122 of the worm wheel 1121.

Referring to fig. 2, a clamping block 1112 is sleeved outside the bidirectional screw 1131, and the clamping block 1112 is located inside the fixing seat 1111. The clamping block 1112 is a vertically disposed rectangular parallelepiped, and the length direction is perpendicular to the length direction of the machine body 1. The bottom of the clamping block 1112 is connected with the fixed seat 1111 in a sliding manner and is in threaded connection with the bidirectional screw 1113. And in the embodiment, two clamping blocks 1112 are arranged, and the two clamping blocks 1112 are positioned at two opposite ends of the thread of the bidirectional screw 1113. When the bidirectional screw 1113 is rotated, the clamp blocks 1112 screw-coupled to the bidirectional screw 1113 are moved toward or away from each other. And the side surfaces of the two clamping blocks 1112 which are opposite to each other are both provided with bending surfaces. When the two clamping blocks 1112 are close to each other to clamp the workpiece to be tested, the bending surface increases the friction between the clamping blocks 1112 and the workpiece to be tested, and increases the clamping degree of the clamping blocks 1112 on the workpiece to be tested.

Referring to fig. 3, the jig 11 includes an upper jig 1101 and a lower jig 1102. The lower clamp 1102 is fixedly connected with the machine body 1. The upper clamp 1101 is connected with a sliding assembly, and the sliding assembly is used for driving the upper clamp 1101 to slide in the vertical direction of the machine body 1 so as to detect a workpiece to be detected. In this embodiment, the slide assembly includes a lead screw 1131 and a nut that mate. The lead screw 1131 is vertically arranged on the machine body 1, and the bottom end of the lead screw 1131 penetrates through the top of the machine body 1 and is coaxially and fixedly connected with a motor fixed inside the machine body 1. The screw 1131 is externally sleeved with a nut, and the nut is in threaded connection with the screw 1131. The external portion of the nut is fixedly sleeved with a connection plate 1132. The outside cover of sliding assembly is equipped with dust cover box 1134 for carrying out dustproof protection to sliding assembly. The dust cover box 1134 is a vertically disposed rectangular box, and the length direction is parallel to the length direction of the machine body 1. One side of the dust cover box 1134 close to the clamp 11 is a corrugated dust plate 1135, the connecting plate 1132 passes through the dust plate 1135, the bottom of the connecting plate is fixedly connected with the upper clamp 1101 through a connecting block 1133, and the dust plate 1135 can move relatively on the dust cover box 1134 according to the movement of the upper clamp 1101.

In order to stabilize the sliding of the upper clamp 1101, referring to fig. 3, a steady member that slides in cooperation with the upper clamp 1101 is further connected to the upper clamp 1101. In this embodiment the stabilizing member is a guide bar 114. The guide bar 114 is located on the side of the dust cover box 1134 away from the control box 10, and is vertically placed. The bottom end of the guide rod 114 is fixedly connected with the machine body 1. The connection plate 1132 is sleeved outside the guide rod 114 and slidably connected to the guide rod 114. The guide rod 114 is further provided with a stop block 1141. The stop block 1141 is in a flat ring shape, and the axis thereof coincides with the axis of the guide rod 114. The limiting block 1141 is sleeved outside the guide rod 114, and the limiting block 1141 limits the displacement of the connecting plate 1132 on the guide rod 114, so as to limit the sliding displacement of the upper clamp 1101. The two limit blocks 1141 are disposed, and the two limit blocks 1141 are respectively close to two ends of the guide rod 114 in the length direction. The top and bottom of the guide rod 114 are also fixedly connected with springs, and when the connecting plate 1132 is rapidly lifted or lowered, the springs play a role in buffering, so that damage to the upper clamp 1101 is reduced.

The implementation principle of the PUR hot melt adhesive tensile testing machine in the embodiment of the application is as follows: the two clamping blocks 1112 are driven to approach or separate from each other through the bidirectional screw 1113 to clamp the workpiece to be tested by the clamp 11, and the bolt does not need to be screwed for operation, so that the operation is convenient; when the bidirectional screw 1113 is operated, the distance between the two clamping blocks 1112 which are close to each other is the same, so that a workpiece to be tested is conveniently positioned, and the use convenience of the tensile testing machine is improved.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. A PUR hot melt adhesive tensile testing machine comprises a machine body (1), wherein a clamp (11) is arranged on the machine body (1); the method is characterized in that: the clamp (11) comprises a fixed seat (1111), the fixed seat (1111) is connected with two clamping blocks (1112) for clamping and fixing a workpiece to be tested, and the two clamping blocks (1112) are respectively connected with the fixed seat (1111) in a sliding manner; the fixing seat (1111) is rotatably connected with a bidirectional screw rod (1113), and the two clamping blocks (1112) are respectively sleeved at two ends of the bidirectional screw rod (1113) with opposite screw thread rotation directions and are in threaded connection with the bidirectional screw rod (1113).

2. The PUR hot melt adhesive tensile testing machine according to claim 1, characterized in that: the bidirectional screw rod (1113) is connected with an adjusting component for adjusting the rotation of the bidirectional screw rod (1113).

3. The PUR hot melt adhesive tensile testing machine according to claim 2, characterized in that: the adjusting assembly comprises a worm wheel (1121) and a worm (1122) which are matched, the worm wheel (1121) is fixedly sleeved on the two-way screw rod (1113), and the worm (1122) is rotatably connected with the fixing seat (1111).

4. The PUR hot melt adhesive tensile testing machine according to claim 3, characterized in that: one end of the worm (1122) far away from the fixed seat (1111) is fixedly connected with a rotating handle (1123).

5. The PUR hot melt adhesive tensile testing machine according to claim 1, characterized in that: the opposite sides of the two clamping blocks (1112) are bent surfaces.

6. The PUR hot melt adhesive tensile testing machine according to claim 1, characterized in that: the clamp (11) comprises an upper clamp (1101) and a lower clamp (1102) which are arranged in the vertical direction of the machine body (1); lower anchor clamps (1102) and organism (1) fixed connection, go up anchor clamps (1101) and be connected with the subassembly that slides, the subassembly that slides includes complex lead screw (1131) and screw, screw and last anchor clamps (1101) fixed connection, lead screw (1131) are connected with the motor, and motor drive goes up anchor clamps (1101) and moves on the vertical direction of organism (1).

7. The PUR hot melt adhesive tensile testing machine according to claim 6, characterized in that: the upper clamp (1101) is also connected with a stable piece matched with the upper clamp (1101) in a sliding mode.

8. The PUR hot melt adhesive tensile testing machine according to claim 7, characterized in that: the fixing piece is a guide rod (114), the guide rod (114) is fixedly connected with the machine body (1), and the upper clamp (1101) slides on the guide rod (114).

9. The PUR hot melt adhesive tensile testing machine according to claim 8, characterized in that: the guide rod (114) is also connected with a limiting block (1141) which limits the sliding distance of the upper clamp (1101) in the vertical direction.