CN212123680U - Filling body test piece drawing of patterns auxiliary device - Google Patents
Filling body test piece drawing of patterns auxiliary device Download PDFInfo
- Publication number
- CN212123680U CN212123680U CN202020508965.2U CN202020508965U CN212123680U CN 212123680 U CN212123680 U CN 212123680U CN 202020508965 U CN202020508965 U CN 202020508965U CN 212123680 U CN212123680 U CN 212123680U
- Authority
- CN
- China
- Prior art keywords
- test piece
- sleeve
- eccentric
- eccentric ball
- sliding block
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 75
- 238000011049 filling Methods 0.000 title claims description 26
- 230000009471 action Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 5
- 238000002360 preparation method Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 238000012856 packing Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 238000005065 mining Methods 0.000 description 3
- 238000011160 research Methods 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Investigating Strength Of Materials By Application Of Mechanical Stress (AREA)
Abstract
The utility model relates to a obturator test piece drawing of patterns auxiliary device, include: the device comprises a base, a test piece die, a sleeve, a guide path support, a groove sliding block, an ejector rod, a spring, a clamping ring, a rubber plug, an eccentric ball support frame, a shaft, an eccentric ball, a handle, an eccentric through hole and a sleeve internal thread. The handle drives as device initiative piece, clockwise rotation the handle drives eccentric ball clockwise rotation promotes the recess slider ejector pin and the rubber buffer moves left, the rubber buffer gets into the test piece mould is released, accomplishes packing body test piece drawing of patterns process. The utility model discloses based on cam ejector pin mechanism principle, convert the circular motion of the eccentric ball of device into the rectilinear motion about the ejector pin, realize the drawing of patterns work in the obturator test piece preparation process, overcome test piece drawing of patterns difficulty, waste time and energy and drawing of patterns quality shortcoming such as poor, demoulding effect is good to have simple structure, compactness, the manufacturability is good, advantages such as convenient operation.
Description
Technical Field
The utility model relates to a drawing of patterns auxiliary device in the test piece preparation process, specific saying so relates to a obturator test piece drawing of patterns auxiliary device based on cam ejector pin mechanism.
Background
Over the years, the construction of green mines in China has risen to national strategies and actions, which are motivated by the need for maintaining stability of mines and stopes due to the gradual increase of underground mining depth, and the need for improving the recovery rate of natural resources and protecting the environment. The filling mining technology is a key technology for mining with very wide application prospect, the filling material is usually prepared by mixing cement as a cementing agent, tailing and water according to a certain proportion, and the rock mass around the stope is supported in the mine hole to reduce the deformation and the flaking of the stope surrounding rock, so that the mechanical property of the filling body plays a role in determining the filling effect.
At present, in laboratory research, a large number of filling body test pieces are generally prepared by a pouring method to perform mechanical tests to research the performance characteristics of filling materials, but the problems that the test pieces after pouring, curing and forming in a test piece grinding tool are difficult to demould and easy to damage in the demoulding process exist, and a large interference error is caused to the subsequent research on the mechanical properties of the filling body test pieces, so that the design of a filling body test piece demoulding auxiliary device for demoulding samples is very important for ensuring the demoulding quality of the test pieces.
The utility model discloses a manufacturing and designing simple structure, compactness are sought to the purpose, and the manufacturability is good, convenient operation, and the drawing of patterns is effectual, safe practical one kind obturator test piece drawing of patterns auxiliary device.
Disclosure of Invention
The utility model discloses the technical scheme who adopts as follows:
a specimen-ejection assisting device for a filler, comprising: the device comprises a base, a test piece die, a fixed guide way, an eccentric ball support frame, a shaft, an eccentric ball, a handle, an eccentric through hole and a sleeve internal thread; the base is in a boss shape and is positioned at the lowest part of the device; the fixed guide path comprises a sleeve, a guide path bracket, a groove sliding block, a mandril, a spring, a snap ring and a rubber plug, wherein the guide path brackets are two in number and are fixedly arranged in the middle of the upper end of the base through welding, the sleeve is welded and fixed at the upper end of the guide way bracket, the axial line of the sleeve is consistent with the length direction of the base, the groove sliding block is in a round table shape and is movably arranged in the sleeve, the upper end surface of the ejector rod is a spherical groove, the lower end surface of the ejector rod is provided with a threaded blind hole, the ejector rod is in a shaft shape, the two ends of the ejector rod are provided with cylindrical lugs with threads, the right end of the rubber plug is connected with a threaded blind hole on the lower end surface of the groove sliding block, the left end of the rubber plug passes through the spring and the snap ring and is connected with the rubber plug, the two ends of the spring are respectively contacted with the lower end surface of the groove sliding block and the clamping ring in a relaxed state, the clamping ring is in a circular ring shape, and the outer diameter of the clamping ring is welded on the inner side of the sleeve; the eccentric ball support frame is fixedly arranged at the upper end of the base and is positioned on the right side of the fixed guide path; the shaft penetrates through the eccentric through hole on the eccentric ball and is mounted on the eccentric ball support frame through a bearing; the eccentric ball is concentric with the spherical groove of the groove sliding block, the eccentric position of the eccentric ball is provided with the eccentric through hole, and the surface of the ball body close to the eccentric through hole is provided with a threaded blind hole; the handle is fixedly arranged with the threaded blind hole on the eccentric ball through threads; the test piece die is cylindrical, the tail end of one side of the outer surface of the test piece die is processed into threads, and the test piece die can be fixedly installed with the sleeve of the fixed guide way through the internal threads of the sleeve; the sleeve internal thread is located the sleeve is inboard to be close to the terminal of one side of snap ring.
Further, the sleeve is a thin-wall cylinder, and the inner diameter of the sleeve is equal to the outer diameter of the test piece mold; the groove sliding block is in clearance fit with the sleeve, so that the groove sliding block can move smoothly from side to side; the shaft diameter of the ejector rod is slightly smaller than the inner diameter of the clamping ring, but the diameter of the spring is larger than the inner diameter of the clamping ring, so that the spring is compressed under the pressure of the groove sliding block and the clamping ring; the rubber buffer fixed mounting be in the left end of ejector pin, and its circumference diameter slightly is less than the internal diameter of test piece mould guarantees under the promotion of ejector pin, the rubber stopper is in free side-to-side motion in the test piece mould.
Furthermore, the shaft and the eccentric ball are in interference fit, and the eccentric ball is concentric and tangential with the spherical groove of the groove sliding block; the eccentric through hole deviates a certain distance from the center of the eccentric ball; when the groove sliding block is positioned at the rightmost end of the fixed guide path, the eccentric through hole of the eccentric ball is closest to the groove sliding block; when the handle is rotated clockwise, the eccentric ball rotates clockwise around the shaft and pushes the groove sliding block to move leftwards, so that the rubber plug moves leftwards; on the contrary, anticlockwise rotation the handle, the eccentric ball winds axle anticlockwise rotation, because the elastic action of spring, the recess slider moves right, and drives the ejector pin the rubber buffer moves right.
Furthermore, the right end face of the groove sliding block is a spherical groove, is tangent to the surface of the eccentric ball and is in smooth contact with the surface of the eccentric ball, so that the spherical groove of the groove sliding block and the surface of the eccentric ball keep smooth relative motion, and the eccentric circular motion of the eccentric ball is guaranteed to be converted into the left-right linear motion of the groove sliding block.
Furthermore, the external thread at the tail end of the right side of the test piece die is meshed with the internal thread of the sleeve, so that the test piece die and the sleeve can be conveniently mounted and dismounted.
Further, the movement stroke of the groove sliding block should be within the maximum compression amount of the spring and satisfy the movement range of the eccentric ball.
Further, the test piece required in the study in the filling body chamber is generally cylindrical (diameter 50mm, height 100mm), so the length of the test piece mold is the sum of the length of the required standard test piece and the thickness of the rubber stopper.
The utility model also relates to a working method of obturator test piece drawing of patterns auxiliary device, concrete step is as follows: coating silicon oil on the surface of the inner wall of the test piece mold, pouring the prepared filling material into the test piece mold, and after solidification and molding, connecting the test piece mold with the test piece with the inner thread of the sleeve on the sleeve of the fixed guide path in a meshed manner through the outer thread at the right end; at the moment, the spring is in a relaxed state, two ends of the spring are respectively contacted with the lower end surface of the groove sliding block and the clamping ring, the groove sliding block is positioned at the rightmost end of the sleeve, and the eccentric through hole of the eccentric ball is closest to the groove sliding block; the handle is rotated clockwise, the eccentric ball rotates clockwise around the shaft and pushes the groove sliding block to move leftwards along the sleeve, the ejector rod and the rubber plug are pushed to move leftwards, the spring is stressed and compressed, the rubber plug enters the test piece die to push out a filling body test piece, and then the test piece is taken down, so that the demoulding work of the test piece is completed; at the moment, the spring is compressed under the pressure of the groove sliding block and the clamping ring, when the handle is rotated anticlockwise, the eccentric ball rotates anticlockwise around the shaft, and the pressure of the spring is released to push the groove sliding block to move rightwards and drive the ejector rod and the rubber plug to move rightwards until the spring returns to a relaxed state; and taking down the test piece mold, and cleaning the test piece mold to perform next demolding operation.
The utility model discloses a obturator test piece drawing of patterns auxiliary device, its beneficial effect lies in:
(1) the utility model discloses a obturator test piece drawing of patterns auxiliary device conveniently, laborsavingly realize the drawing of patterns work in the obturator test piece preparation process, has avoided traditional obturator test piece drawing of patterns difficulty, wastes time and energy and drawing of patterns quality shortcoming such as poor.
(2) The utility model discloses a obturator test piece drawing of patterns auxiliary device has simple structure compactness, and it is reasonable to distribute, and the manufacturability is good, convenient operation's the advantage that is showing.
Drawings
Fig. 1 is a three-dimensional perspective view of a specimen demoulding auxiliary device of a filling body of the utility model;
FIG. 2 is a cross-sectional view of the device for assisting in demoulding a specimen of a filling body of the present invention;
FIG. 3 is a three-dimensional view of a fixed guide path part of the filling body test piece demoulding auxiliary device of the utility model;
in the figure: 1-base, 2-test piece mould, 3-fixed guide way, 301-sleeve, 302-guide way bracket, 303-groove slide block, 304-ejector rod, 305-spring, 306-snap ring, 307-rubber plug, 4-eccentric ball support frame, 5-shaft, 6-eccentric ball, 7-handle, 8-eccentric through hole and 9-sleeve internal thread.
Detailed Description
The present invention will be further described with reference to the accompanying drawings.
As shown in fig. 1, 2, and 3, a specimen-demoulding auxiliary device for a filling body comprises: the device comprises a base (1), a test piece mold (2), a fixed guide path (3), an eccentric ball support frame (4), a shaft (5), an eccentric ball (6), a handle (7), an eccentric through hole (8) and a sleeve internal thread (9); the base (1) is in a boss shape and is positioned at the lowest part of the device; the fixed guide way (3) comprises a sleeve (301), a guide way support (302), two groove sliding blocks (303), a top rod (304), a spring (305), a snap ring (306) and a rubber plug (307), wherein the guide way support (302) is arranged at the middle part of the upper end of the base (1) in a welding and fixing way, the sleeve (301) is welded and fixed at the upper end of the guide way support (302), the axis of the sleeve (301) is consistent with the length direction of the base (1), the groove sliding blocks (303) are in a round table shape and are movably arranged inside the sleeve (301), the upper end surface of the sleeve is a spherical groove, the lower end surface of the sleeve is provided with a threaded blind hole, the top rod (304) is in a shaft shape, the two ends of the sleeve are cylindrical convex blocks with threads, the right end of the sleeve is connected with the threaded blind hole of the lower end surface of the groove sliding blocks (303), and the left end of the spring (305) and the snap ring, two ends of the spring (305) are respectively contacted with the lower end surface of the groove sliding block (303) and the snap ring (306) in a loosening state, the snap ring (306) is annular, and the outer diameter of the snap ring (306) is welded on the inner side of the sleeve (301); the eccentric ball support frame (4) is fixedly arranged at the upper end of the base (1) and is positioned at the right side of the fixed guide path (3); the shaft (5) penetrates through the eccentric through hole (8) on the eccentric ball (6) and is mounted on the eccentric ball support frame (4) through a bearing; the eccentric ball (6) is concentric with the spherical groove of the groove sliding block (303), the eccentric position of the eccentric ball (6) is provided with the eccentric through hole (8), and the surface of the ball body close to the eccentric through hole (8) is provided with a threaded blind hole; the handle (7) is fixedly arranged with the threaded blind hole on the eccentric ball (6) through threads; the test piece die (2) is cylindrical, the tail end of one side of the outer surface of the test piece die is processed into threads, and the test piece die can be fixedly installed with the sleeve (301) of the fixed guide path (3) through the sleeve internal threads (9); the sleeve internal thread (9) is positioned at the tail end of one side, close to the snap ring (306), of the inner side of the sleeve (301).
As shown in fig. 1, 2 and 3, the working method of the filling body test piece demoulding auxiliary device of the utility model comprises the following steps:
smearing silicon oil on the surface of the inner wall of the test piece mold (2), pouring the configured filling material into the test piece mold (2), and after solidification and forming, connecting the test piece mold (2) with the test piece with the sleeve internal thread (9) on the sleeve (301) of the fixed guide way (3) in a meshed manner through the external thread at the right side tail end; at the moment, the spring (305) is in a relaxed state, two ends of the spring are respectively contacted with the lower end surface of the groove sliding block (303) and the snap ring (306), the groove sliding block (303) is positioned at the rightmost end of the sleeve (301), and the eccentric through hole (8) of the eccentric ball (6) is closest to the groove sliding block (303); the handle (7) is rotated clockwise, the eccentric ball (6) rotates clockwise around the shaft (5) and pushes the groove sliding block (303) to move leftwards along the sleeve (301), the ejector rod (304) and the rubber plug (307) to move leftwards, the spring (305) is stressed and compressed, the rubber plug (307) enters the test piece die (2) to push out the filling body test piece, and then the test piece is taken down, so that the demoulding operation of the test piece is completed; at the moment, the spring (305) is compressed under the pressure of the groove sliding block (303) and the snap ring (306), when the handle (7) is rotated anticlockwise, the eccentric ball (6) rotates anticlockwise around the shaft (5), and as the pressure of the spring (305) is released, the groove sliding block (303) is pushed to move rightwards, and the ejector rod (304) and the rubber plug (307) are driven to move rightwards, until the spring (305) returns to a relaxed state; and taking down the test piece mold (2), and cleaning the test piece mold to perform next demolding operation.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. The utility model provides a obturator test piece drawing of patterns auxiliary device which characterized by: the device comprises a base (1), a test piece die (2), a fixed guide way (3), an eccentric ball support frame (4), a shaft (5), an eccentric ball (6), a handle (7), an eccentric through hole (8) and a sleeve internal thread (9); the base (1) is in a boss shape and is positioned at the lowest part of the device; the fixed guide way (3) comprises a sleeve (301), a guide way support (302), two groove sliding blocks (303), a top rod (304), a spring (305), a snap ring (306) and a rubber plug (307), wherein the guide way support (302) is arranged at the middle part of the upper end of the base (1) in a welding and fixing way, the sleeve (301) is welded and fixed at the upper end of the guide way support (302), the axis of the sleeve (301) is consistent with the length direction of the base (1), the groove sliding blocks (303) are in a round table shape and are movably arranged inside the sleeve (301), the upper end surface of the sleeve is a spherical groove, the lower end surface of the sleeve is provided with a threaded blind hole, the top rod (304) is in a shaft shape, the two ends of the sleeve are cylindrical convex blocks with threads, the right end of the sleeve is connected with the threaded blind hole of the lower end surface of the groove sliding blocks (303), and the left end of the spring (305) and the snap ring, two ends of the spring (305) are respectively contacted with the lower end surface of the groove sliding block (303) and the snap ring (306) in a loosening state, the snap ring (306) is annular, and the outer diameter of the snap ring (306) is welded on the inner side of the sleeve (301); the eccentric ball support frame (4) is fixedly arranged at the upper end of the base (1) and is positioned at the right side of the fixed guide path (3); the shaft (5) penetrates through the eccentric through hole (8) on the eccentric ball (6) and is mounted on the eccentric ball support frame (4) through a bearing; the eccentric ball (6) is concentric with the spherical groove of the groove sliding block (303), the eccentric position of the eccentric ball (6) is provided with the eccentric through hole (8), and the surface of the ball body close to the eccentric through hole (8) is provided with a threaded blind hole; the handle (7) is fixedly arranged with the threaded blind hole on the eccentric ball (6) through threads; the test piece die (2) is cylindrical, the tail end of one side of the outer surface of the test piece die is processed into threads, and the test piece die can be fixedly installed with the sleeve (301) of the fixed guide path (3) through the sleeve internal threads (9); the sleeve internal thread (9) is positioned at the tail end of one side, close to the snap ring (306), of the inner side of the sleeve (301).
2. The specimen-demoulding auxiliary device for filling bodies as claimed in claim 1, wherein: the sleeve (301) is a thin-walled cylinder, and the inner diameter of the sleeve is equal to the outer diameter of the test piece mold (2); the groove sliding block (303) is in clearance fit with the sleeve (301), so that the groove sliding block (303) can move smoothly from side to side; the shaft diameter of the ejector rod (304) is slightly smaller than the inner diameter of the clamping ring (306), but the diameter of the spring (305) is larger than the inner diameter of the clamping ring (306), so that the spring (305) is compressed under the pressure of the groove sliding block (303) and the clamping ring (306); rubber buffer (307) fixed mounting be in the left end of ejector pin (304), and its circumference diameter slightly is less than the internal diameter of test piece mould (2), guarantee under the promotion of ejector pin (304), rubber buffer (307) are in free side-to-side movement in test piece mould (2).
3. The specimen-demoulding auxiliary device for filling bodies as claimed in claim 1, wherein: the shaft (5) and the eccentric ball (6) are in interference fit, and the eccentric ball (6) is concentric and tangential with the spherical groove of the groove sliding block (303); the eccentric through hole (8) deviates a certain distance from the center of the eccentric ball (6); when the groove sliding block (303) is positioned at the rightmost end of the fixed guide way (3), the eccentric through hole (8) of the eccentric ball (6) is closest to the groove sliding block (303); when the handle (7) is rotated clockwise, the eccentric ball (6) rotates clockwise around the shaft (5) and pushes the groove sliding block (303) to move leftwards, so that the rubber plug (307) moves leftwards; on the contrary, anticlockwise rotation handle (7), eccentric ball (6) wind axle (5) anticlockwise rotation, because the spring action of spring (305), recess slider (303) move to the right, and drive ejector pin (304) rubber buffer (307) move to the right.
4. The specimen-demoulding auxiliary device for filling bodies as claimed in claim 1, wherein: the right end face of the groove sliding block (303) is a spherical groove, is tangent to the surface of the eccentric ball (6) and is in smooth contact with the surface of the eccentric ball (6), so that the spherical groove of the groove sliding block (303) and the surface of the eccentric ball (6) keep smooth relative motion, and the eccentric circular motion of the eccentric ball (6) is guaranteed to be converted into the left and right linear motion of the groove sliding block (303).
5. The specimen-demoulding auxiliary device for filling bodies as claimed in claim 1, wherein: through the external thread at the tail end of the right side of the test piece die (2) and the sleeve internal thread (9) are meshed, the test piece die (2) and the sleeve (301) are convenient to mount and dismount.
6. The specimen-demoulding auxiliary device for filling bodies as claimed in claim 1, wherein: the movement stroke of the groove sliding block (303) is within the maximum compression amount of the spring (305) and meets the movement range of the eccentric ball (6).
7. The specimen-demoulding auxiliary device for filling bodies as claimed in claim 1, wherein: the length of the test piece die (2) is the sum of the length of a required standard test piece and the thickness of the rubber plug (307).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020508965.2U CN212123680U (en) | 2020-04-09 | 2020-04-09 | Filling body test piece drawing of patterns auxiliary device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202020508965.2U CN212123680U (en) | 2020-04-09 | 2020-04-09 | Filling body test piece drawing of patterns auxiliary device |
Publications (1)
Publication Number | Publication Date |
---|---|
CN212123680U true CN212123680U (en) | 2020-12-11 |
Family
ID=73687130
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202020508965.2U Expired - Fee Related CN212123680U (en) | 2020-04-09 | 2020-04-09 | Filling body test piece drawing of patterns auxiliary device |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN212123680U (en) |
-
2020
- 2020-04-09 CN CN202020508965.2U patent/CN212123680U/en not_active Expired - Fee Related
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102689450B (en) | Quasi-isostatic pressing vacuum hydraulic machine | |
CN212123680U (en) | Filling body test piece drawing of patterns auxiliary device | |
CN212042294U (en) | Stainless steel plastic mould | |
CN209363565U (en) | A kind of sand compaction tooling | |
CN111319124A (en) | Filling body test piece drawing of patterns auxiliary device | |
CN219253857U (en) | Stamping die for multi-station assembly type automobile parts | |
CN211105334U (en) | Special type mould for hold-in range | |
CN210062174U (en) | Bottom expanding and pressing forming device for special-shaped paper container | |
CN210816992U (en) | High stability auto parts compression moulding mould | |
CN112720802A (en) | Extrusion molding device is used in production of environmental protection brick | |
CN220994862U (en) | Inspection shaft steel mould applicable to different heights | |
CN211235200U (en) | Concrete test | |
CN110640979A (en) | Injection mold convenient for demolding | |
CN221249261U (en) | Concrete mould convenient to drawing of patterns | |
CN219153594U (en) | Structure is changed to injection mold movable insert core piece | |
CN220841077U (en) | One-time vulcanization mold for O-shaped sealing ring | |
CN212446087U (en) | Demoulding device for injection moulding grinding tool | |
CN218973962U (en) | Sampling device for concrete detection | |
CN214408983U (en) | Concrete slump detection device | |
CN221392001U (en) | Forming injection mold of pump head cover | |
CN210061827U (en) | Tee bend pipe fitting mould | |
CN211683256U (en) | Plastic mold manufacturing and processing device | |
CN214819444U (en) | Mortar test block forming device | |
CN214819457U (en) | Experimental mold for steel fiber rubber concrete test piece | |
CN213763925U (en) | Whole psammitolite of special cylinder cap for diesel engine |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
GR01 | Patent grant | ||
GR01 | Patent grant | ||
CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201211 Termination date: 20210409 |
|
CF01 | Termination of patent right due to non-payment of annual fee |