CN220854721U - Device for detecting shrinkage rate of sample - Google Patents

Abstract

The utility model relates to the technical field of testing, in particular to a device for detecting the shrinkage rate of a sample, which comprises a base, a positioning component, a clamp component and a plurality of first dial gauges, wherein the clamp component and the positioning component are respectively arranged at the top of the base, the positioning component and the clamp component are oppositely arranged to form a placing groove for placing the sample between the positioning component and the clamp component, the positioning component is abutted with one end of the sample placed in the placing groove, the first dial gauges are arranged on the clamp component, and the first dial gauges can be abutted with the other end of the sample placed in the placing groove. According to the utility model, the positioning assembly can be used for carrying out abutting positioning on the contracted and deformed sample, so that the normal contracted sample can be detected, and the detection accuracy is improved.

Description

Device for detecting shrinkage rate of sample

Technical Field

The utility model relates to the technical field of testing, in particular to equipment for detecting shrinkage of a sample.

Background

The characteristics of the plastic product are: after injection molding, shrinkage occurs during cooling, and if the temperature rises through coating baking, shrinkage also occurs again during cooling. The shrinkage is a characteristic of the shrinkage from a hot state to room temperature during cooling of the plastic. Shrinkage of plastic parts is an important factor that must be considered in the manufacturing process. After shrinkage rate data are obtained through testing, the size of the die can be corrected according to the shrinkage rate, so that the product size is ensured to accurately meet the design requirement; the shrinkage of the plastic can also be used to evaluate the molding quality of the molded product, as well as to predict the deformation and defects that result from molding. The deformation condition of the product in the cooling process can be predicted by testing the shrinkage rate, and possible defects are found in advance, so that the molding process is adjusted, and the quality of the product is ensured; by testing the plastic shrinkage data, the injection molding process can be optimized, such as adjusting parameters of injection molding temperature, mold temperature, pressure and the like, so as to realize better molding effect and better shrinkage performance; through testing and analysis, the problems existing in the manufacturing process can be found out, and corresponding measures are taken for improvement, so that the rejection rate of products and the process cost are reduced.

Each plastic has a different shrinkage, which is typically determined by the type of plastic selected prior to injection molding. In general, shrinkage data of plastic parts can be obtained by performing a test on a molded sample of a dedicated mold. In the test process, three-dimensional scanning can be performed on the parts with high precision requirements, and differences between the scanned data and the design drawing data are compared, so that shrinkage rate data are obtained; the precision requirement is low, and the shrinkage data can be obtained by comparing and calculating the difference between the detection data of the formed sample and the size of the mould through the vernier caliper, however, the three-dimensional scanning is performed by using a three-coordinate measuring instrument, the equipment price is high, the long testing time is required, the occupied area of the equipment is large, the operation is inflexible, and the accuracy is insufficient through the measurement of the vernier caliper.

The prior art discloses a detect device of little shrinkage power value sample shrinkage, include: a base; a sample holder mounted on the base; at least one shrinkage rate detection station is arranged on the sample fixing frame; the encoder is arranged on the base and is connected with the controller; the winding roller is arranged on the main shaft of the encoder and fixedly connected with the material sample on the shrinkage rate detection station, when the material sample is subjected to shrinkage deformation in a preset environment, the encoder is used for detecting the rotation angle information of the winding roller and transmitting the rotation angle information to the controller, and the controller calculates the shrinkage rate of the material sample according to the diameter of the winding roller. However, in this solution, the sample detected by the device needs to be placed in a preset environment, and the shrinkage rate is detected during the shrinkage deformation process, and fixing the sample by the clamping plate and the connecting piece will result in that the portion where the sample is connected with the clamping plate cannot be shrunk normally or the clamping plate cannot be connected with the shrunk sample normally, and the accuracy of shrinkage rate detection cannot be ensured.

Disclosure of utility model

The utility model aims to overcome the defects of the prior art and provides equipment for detecting the shrinkage rate of a sample, which can be used for carrying out abutting positioning on the shrinkage deformed sample through a positioning assembly, detecting the normal shrinkage sample and improving the detection accuracy.

In order to solve the technical problems, the utility model adopts the following technical scheme:

The utility model provides a detect equipment of sample shrinkage, including base, locating component, anchor clamps subassembly and a plurality of first amesdial, anchor clamps subassembly, locating component install respectively in the base top, just locating component with the anchor clamps subassembly sets up relatively in order to form the standing groove that is used for placing the sample between locating component and the anchor clamps subassembly, locating component with put into the one end butt of the sample in the standing groove, first amesdial install in the anchor clamps subassembly, first amesdial can with put into the other end butt of the sample in the standing groove.

When the device for detecting the shrinkage rate of the sample is used, the standard sample and the sample to be detected are required to be prepared, the sizes of the standard sample and the sample to be detected are consistent, and the weight of the standard sample and the sample to be detected can be adjusted to be consistent with the theoretical weight through an up-down and up-down bucking pressure fine adjustment process; during measurement, a standard sample is placed in the placing groove, the standard sample is abutted to the positioning component to position the standard sample, a first dial gauge arranged on the clamp component is adjusted, a measuring head of the first dial gauge contacts the standard sample, the reading of the first dial gauge is recorded, then the standard sample is taken out, a shrinkage deformed sample to be measured is placed in the placing groove, the sample to be measured after the shrinkage deformation is abutted to the positioning component to position the sample to be measured, the first dial gauge is adjusted, the measuring head of the first dial gauge contacts the sample to be measured, the reading of the first dial gauge is recorded, the shrinkage of the sample can be obtained by taking the two readings of the first dial gauge as a difference, and the shrinkage ratio of the size of the shrinkage and the standard sample is calculated. According to the utility model, the positioning assembly can be used for abutting and positioning the contracted and deformed sample, so that the normal contracted sample can be detected, and the detection accuracy can be improved. The shrinkage rate of the plurality of samples to be measured is measured to average value, so that the measurement accuracy is further improved. After the measuring head of the first dial indicator is adjusted to be in contact with the standard sample, the reading of the first dial indicator can be zeroed and corrected, and the reading of the first dial indicator can be used for indicating the shrinkage of the sample when the measuring head of the first dial indicator is in contact with the sample to be measured, so that the shrinkage of the sample can be calculated conveniently.

Further, the positioning assembly comprises a first positioning piece arranged on the base, and the first positioning piece is abutted with the end face of one end of the sample; the fixture assembly comprises a first boss arranged at the top of the base, and a plurality of first dial indicators are arranged on the first boss.

Further, the positioning assembly further comprises a plurality of second positioning pieces arranged on the base, the second positioning pieces are abutted with one side of the sample, and the end faces of the two ends of the sample are perpendicular to the side faces of the two sides of the sample; the fixture assembly further comprises a second boss arranged at the top of the base, the second boss is perpendicular to the first boss, a plurality of second dial indicators are arranged on the second boss, and the second dial indicators can be in butt joint with the other side of the sample.

Further, the placement groove is rectangular, the first boss is arranged along the short side of the placement groove, and the second boss is arranged along the long side of the placement groove.

Further, the first dial indicator and the second dial indicator are respectively provided with two dial indicators, the two dial indicators are respectively arranged at the two ends of the first boss, and the two dial indicators are respectively arranged at the two ends of the second boss.

Further, the second boss is provided with a first standby dial indicator, and the first standby dial indicator is located between the two second dial indicators.

Further, two second locating pieces are arranged, and the two second locating pieces are arranged along the long side of the placing groove.

Further, the device also comprises a third boss, a fourth boss and a fifth boss, wherein the third boss is arranged along the long side of the placing groove, the third boss is positioned between the two second positioning pieces, the third boss is arranged opposite to the second boss, and a second standby dial indicator can be installed on the third boss; the fourth boss and the fifth boss are arranged along the short side of the placing groove, the fourth boss and the fifth boss are respectively located on two sides of the first locating piece, the fourth boss and the fifth boss are opposite to the first boss, the fourth boss can be provided with a third standby dial indicator, and the fifth boss can be provided with a fourth standby dial indicator.

Further, the device also comprises a cushion block for adjusting the placing height of the sample, and the cushion block is detachably arranged in the placing groove.

Further, the base is provided with a pressing mechanism for pressing the sample.

Compared with the background technology, the device for detecting the shrinkage of the sample has the following beneficial effects:

The positioning assembly can be used for carrying out abutting positioning on the sample after shrinkage deformation, so that the sample after normal shrinkage can be detected, and the detection accuracy is improved.

Drawings

FIG. 1 is a schematic view of an apparatus for detecting shrinkage of a sample according to an embodiment of the present utility model at a first view angle;

FIG. 2 is a perspective view of an apparatus for detecting shrinkage of a sample according to an embodiment of the present utility model;

FIG. 3 is a schematic structural diagram of an apparatus for detecting shrinkage of a sample according to an embodiment of the present utility model at a second view angle;

fig. 4 is a schematic structural diagram of an apparatus for detecting shrinkage of a sample according to an embodiment of the present utility model at a third view angle.

In the accompanying drawings: 1-a base; 11-waist groove; 2-positioning assembly; 21-a first positioning member; 22-a second positioning member; 3-a clamp assembly; 31-a first boss; 311-first installation site; 32-a second boss; 321-a second installation site; 322-third installation site; 33-a third boss; 331-fourth mounting location; 34-fourth boss; 341-fifth mounting location; 35-fifth boss; 351-sixth mounting locations; 4-cushion blocks; 5-a compressing mechanism; 51-compression hinge; 52-tabletting; and 6-dial gauge placing box.

Detailed Description

The utility model is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the utility model, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numbers in the drawings of embodiments of the utility model correspond to the same or similar components; in the description of the present utility model, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present utility model and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.

Example 1

The utility model provides a detect equipment of sample shrinkage, as shown in FIG. 1, including base 1, locating component 2, anchor clamps subassembly 3 and a plurality of first amesdial, anchor clamps subassembly 3, locating component 2 are installed respectively in base 1 top, and locating component 2 and anchor clamps subassembly 3 set up relatively in order to form the standing groove that is used for placing the sample between locating component 2 and anchor clamps subassembly 3, locating component 2 and the one end butt of the sample of putting into the standing groove, first amesdial is installed in anchor clamps subassembly 3, first amesdial can with the other end butt of the sample of putting into the standing groove.

According to the equipment for detecting the shrinkage rate of the sample, during detection, the standard sample and the sample to be detected are required to be prepared, the sizes of the standard sample and the sample to be detected are consistent, the weight of the standard sample and the sample to be detected can be adjusted to be consistent with the theoretical weight through an bucktooth pressure fine adjustment process, and the density of the standard sample and the sample to be detected is ensured to be consistent with the theoretical density of the material; during measurement, a standard sample is placed in the placing groove, the standard sample is abutted through the positioning component 2 to position the standard sample, the first dial indicator arranged on the clamp component 3 is adjusted, the measuring head of the first dial indicator contacts the standard sample, the reading of the first dial indicator is recorded, then the standard sample is taken out, the shrinkage deformed sample to be measured is placed in the placing groove, the sample to be measured after the shrinkage deformation is abutted through the positioning component 2 to position the sample to be measured, the first dial indicator is adjusted, the measuring head of the first dial indicator contacts the sample to be measured, the reading of the first dial indicator is recorded, the shrinkage of the sample can be obtained by taking the two readings of the first dial indicator as the difference, and the shrinkage ratio of the size of the shrinkage and the standard sample is calculated, so that the shrinkage ratio of the sample can be obtained. According to the embodiment, the positioning assembly 2 can be used for carrying out abutting positioning on the contracted and deformed sample, the normal contracted sample can be detected, and the detection accuracy can be improved. The shrinkage rate of the plurality of samples to be measured is measured to average value, so that the measurement accuracy is further improved. After the measuring head of the first dial indicator is adjusted to be in contact with the standard sample, the reading of the first dial indicator can be zeroed and corrected, and the reading of the first dial indicator can be used for indicating the shrinkage of the sample when the measuring head of the first dial indicator is in contact with the sample to be measured, so that the shrinkage of the sample can be calculated conveniently.

As shown in fig. 1 and 4, the positioning assembly 2 includes a first positioning member 21 attached to the base 1, and the first positioning member 21 abuts against an end face of one end of the sample; the fixture assembly 3 comprises a first boss 31 arranged at the top of the base 1, and a plurality of first dial indicators are arranged on the first boss 31. When carrying equipment or not needing to measure, the first dial indicator can be taken down from the first boss 31, and when measuring is implemented, the first positioning piece 21 can be used for positioning the sample placed in the placing groove, and then the first dial indicator is installed on the first boss 31 for measuring.

The first dial indicator is provided with two, and two first dial indicators are respectively installed at two ends of the first boss 31, and the shrinkage of the sample is measured and averaged through the two first dial indicators, so that the measurement accuracy can be further improved.

As shown in fig. 1, the device also comprises a cushion block 4 for adjusting the placing height of the sample, and the cushion block 4 is detachably arranged in the placing groove. During implementation, the cushion block 4 with proper thickness is selected according to the thickness of the sample, the cushion block 4 is installed in the placing groove, the sample is placed at the top of the cushion block 4, and the height position of the sample is ensured to meet the measurement requirement of the first dial indicator.

As shown in fig. 1, the base 1 is provided with a compressing mechanism 5 for compressing a sample, and when the sample to be tested is detected, the sample to be tested can be compressed by the compressing mechanism 5, so that the warping of the sample to be tested caused by shrinkage deformation is prevented from affecting detection.

Specifically, as shown in fig. 1 to 4, the pressing mechanism 5 includes a pressing hinge 51 and a pressing sheet 52, the pressing hinge 51 includes a fixing base, an operation end, a pressing end and a reversing assembly, the fixing base is fixedly mounted on the base 1, one end of the operation end and one end of the pressing end are respectively rotationally connected with the fixing base, the reversing assembly includes a first reversing element disposed at one end of the operation end and a second reversing element disposed at one end of the pressing end, the first reversing element is in transmission connection with the second reversing element, the rotation direction of the first reversing element is opposite to that of the second reversing element, the other end of the pressing end is connected with the pressing sheet 52, and the pressing sheet 52 can be in butt connection with a sample disposed in the mounting groove. During detection, a sample to be detected is placed on the cushion block 4, the operation end is pressed, the first operation end is rotated, the first reversing element is further rotated, the second reversing element is driven to rotate, the pressing end provided with the second reversing element is reversely rotated, and the pressing piece 52 is driven to press the sample to be detected through the pressing end. When it should be noted that other pressing mechanisms 5 capable of pressing the sample to be tested to prevent the warpage of the sample to be tested from affecting the detection in this embodiment are suitable for this embodiment.

Example two

The difference between this embodiment and the embodiment is that, as shown in fig. 1 and 2, the positioning assembly 2 further includes a plurality of second positioning members 22 installed on the base 1, the second positioning members 22 are abutted to one side of the sample, and the end surfaces of both ends of the sample are perpendicular to the side surfaces of both sides of the sample; as shown in fig. 1 to 4, the fixture assembly 3 further includes a second boss 32 mounted on the top of the base 1, the second boss 32 is perpendicular to the first boss 31, the second boss 32 is provided with a plurality of second dial indicators, and the second dial indicators can be abutted to the other side of the sample. When the carrying equipment or the measurement is not needed, the first dial indicator can be taken down from the first boss 31, and the second dial indicator can be taken down from the second boss 32; during measurement, a standard sample is placed in the placing groove, one end of the standard sample is abutted through the first positioning piece 21, one side of the standard sample is abutted through the second positioning piece 22, the first dial gauge and the second dial gauge which are respectively arranged on the first boss 31 and the second boss 32 are adjusted, the measuring head of the first dial gauge contacts with the other end of the standard sample, the measuring head of the second dial gauge contacts with the other side of the standard sample, the readings of the first dial gauge and the second dial gauge are recorded, then the standard sample is taken out, the sample to be measured after shrinkage deformation is placed in the placing groove, the operation is repeated, the readings of the first dial gauge and the second dial gauge are recorded again, and the transverse shrinkage and the longitudinal shrinkage of the sample are calculated according to the twice recorded data.

The standing groove is rectangular, and the first boss 31 is arranged along the short side of the standing groove, and the second boss 32 is arranged along the long side of the standing groove. Specifically, as shown in fig. 1 to 3, the two ends of the first boss 31 are respectively provided with a first mounting position 311, the two ends of the second boss 32 are respectively provided with a second mounting position 321, the first dial gauge and the second dial gauge are respectively provided with two first dial gauges, the two first dial gauges are respectively arranged at the first mounting positions 311 at the two ends of the first boss 31, the two second dial gauges are respectively arranged at the second mounting positions 321 at the two ends of the second boss 32, the transverse shrinkage of the sample is measured and averaged by the two first dial gauges, the longitudinal shrinkage of the sample is measured and averaged by the two second dial gauges, and the measurement accuracy can be further improved.

As shown in fig. 3, the second boss 32 is provided with a third mounting location 322, and the third mounting location 322 may be used to mount a first standby dial gauge, with the first standby dial gauge being located between two second dial gauges. When the length of the sample is longer, the first standby dial indicator can be started, the shrinkage of the sample is measured synchronously through the two second dial indicators and the first standby dial indicator, the measurement accuracy is improved, and the first standby dial indicator can be one or more than one, the shrinkage is calculated through the shrinkage average, and the measurement accuracy is further improved. When the sample length is shorter, the shrinkage measuring average value can be measured through the first standby dial indicator and the second dial indicator which is close to the first positioning piece 21 together, so that the accuracy of the shrinkage measurement of the shorter sample is ensured.

Example III

The present embodiment is similar to the embodiment except that, as shown in fig. 1, two second positioning members 22 are provided, and the two second positioning members 22 are disposed along the long side of the placement groove. In practice, the two second positioning members 22 are respectively abutted against one side of the sample, so that the accurate positioning of one side of the sample is ensured.

As shown in fig. 2 and 4, the first positioning member 21 and the second positioning member 22 are cylindrical pins, and the outer walls of the cylindrical pins are in contact with the sample to position the sample.

As shown in fig. 1 to 4, the device further comprises a third boss 33, a fourth boss 34 and a fifth boss 35, wherein the third boss 33 is arranged along the long side of the placing groove, the third boss 33 is positioned between the two second positioning pieces 22, the third boss 33 is arranged opposite to the second boss 32, and the third boss 33 is provided with a fourth installation position 331 for installing a second standby dial indicator; the fourth boss 34 and the fifth boss 35 are arranged along the short side of the placing groove, the fourth boss 34 and the fifth boss 35 are respectively located at two sides of the first positioning piece 21, the fourth boss 34 and the fifth boss 35 are arranged opposite to the first boss 31, the fourth boss 34 is provided with a fifth installation position 341 capable of installing the third standby dial indicator, and the fifth boss 35 is provided with a sixth installation position 351 capable of installing the fourth standby dial indicator. Before detection, a second standby dial gauge, a third standby dial gauge and a fourth standby dial gauge can be respectively arranged on the third boss 33, the fourth boss 34 and the fifth boss 35, and whether the end face of the sample close to the cylindrical pin is smooth or not can be confirmed through the second standby dial gauge, the third standby dial gauge and the fourth standby dial gauge.

As shown in fig. 1 to 4, the base 1 is provided with a dial gauge placing box 6. When handling equipment or need not measure, can place first amesdial, second amesdial, first reserve amesdial, second reserve amesdial, third reserve amesdial and fourth reserve amesdial in amesdial place box 6, be convenient for deposit, and the holistic transport of equipment of being convenient for.

As shown in fig. 1 and 2, the base 1 is provided with a waist groove 11, specifically, two sides of the base 1 are provided with waist grooves 11 to reduce the weight of the equipment, and meanwhile, the waist grooves 11 can be held by a detector, so that the detector can conveniently carry the equipment or go out to carry the equipment.

In the specific content of the above embodiment, any combination of the technical features may be performed without contradiction, and for brevity of description, all possible combinations of the technical features are not described, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

It is to be understood that the above examples of the present utility model are provided by way of illustration only and not by way of limitation of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The utility model provides a detect equipment of sample shrinkage, its characterized in that, includes base (1), locating component (2), anchor clamps subassembly (3) and a plurality of first amesdial, anchor clamps subassembly (3), locating component (2) install respectively in base (1) top, just locating component (2) with anchor clamps subassembly (3) set up relatively in order to form the standing groove that is used for placing the sample between locating component (2) and anchor clamps subassembly (3), locating component (2) with put into the one end butt of the sample in the standing groove, first amesdial install in anchor clamps subassembly (3), first amesdial can with put into the other end butt of the sample in the standing groove.

2. The apparatus for detecting shrinkage of a sample according to claim 1, wherein the positioning assembly (2) comprises a first positioning member (21) mounted on the base (1), the first positioning member (21) being abutted against an end face of one end of the sample; the fixture assembly (3) comprises a first boss (31) arranged at the top of the base (1), and a plurality of first dial gauges are arranged on the first boss (31).

3. The device for detecting the shrinkage of a sample according to claim 2, wherein the positioning assembly (2) further comprises a plurality of second positioning pieces (22) arranged on the base (1), the second positioning pieces (22) are abutted against one side of the sample, and two end surfaces of the sample are perpendicular to two side surfaces of the sample; the fixture assembly (3) further comprises a second boss (32) arranged at the top of the base (1), the second boss (32) is perpendicular to the first boss (31), a plurality of second dial indicators are arranged on the second boss (32), and the second dial indicators can be abutted to the other side of the sample.

4. A device for detecting shrinkage of a sample according to claim 3, wherein the holding tank is rectangular, the first boss (31) is provided along a short side of the holding tank, and the second boss (32) is provided along a long side of the holding tank.

5. The apparatus for detecting shrinkage of a sample according to claim 4, wherein two first dial indicators and two second dial indicators are respectively provided, the two first dial indicators are respectively provided at both ends of the first boss (31), and the two second dial indicators are respectively provided at both ends of the second boss (32).

6. The apparatus for detecting shrinkage of a sample according to claim 5, wherein the second boss (32) is provided with a first standby dial gauge, and the first standby dial gauge is located between the two second dial gauges.

7. The apparatus for measuring shrinkage of a sample according to claim 4, wherein two second positioning members (22) are provided, and the two second positioning members (22) are provided along a long side of the placement groove.

8. The apparatus for detecting shrinkage of a sample according to claim 7, further comprising a third boss (33), a fourth boss (34) and a fifth boss (35), wherein the third boss (33) is disposed along a long side of the placement groove, the third boss (33) is located between the two second positioning members (22), the third boss (33) is disposed opposite to the second boss (32), and the third boss (33) is mountable with a second standby dial gauge; fourth boss (34) and fifth boss (35) are along the minor face setting of standing groove, fourth boss (34) and fifth boss (35) are located respectively the both sides of first setting element (21), just fourth boss (34) and fifth boss (35) all with first boss (31) set up relatively, fourth boss (34) mountable third reserve amesdial, fifth boss (35) mountable fourth reserve amesdial.

9. The apparatus for detecting shrinkage of a sample according to claim 1, further comprising a spacer (4) for adjusting a height of the sample, wherein the spacer (4) is detachably installed in the placement groove.

10. The apparatus for detecting shrinkage of a sample according to any one of claims 1 to 9, wherein the base (1) is provided with a compressing mechanism (5) for compressing the sample.