CN111331073A - Sand mixer for casting - Google Patents
Sand mixer for casting Download PDFInfo
- Publication number
- CN111331073A CN111331073A CN202010199881.XA CN202010199881A CN111331073A CN 111331073 A CN111331073 A CN 111331073A CN 202010199881 A CN202010199881 A CN 202010199881A CN 111331073 A CN111331073 A CN 111331073A
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- China
- Prior art keywords
- rotating shaft
- sand mixer
- sleeve
- main body
- driving
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
- B22C5/0404—Stirring by using vibrations while grinding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C5/00—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose
- B22C5/04—Machines or devices specially designed for dressing or handling the mould material so far as specially adapted for that purpose by grinding, blending, mixing, kneading, or stirring
- B22C5/0409—Blending, mixing, kneading or stirring; Methods therefor
- B22C5/0422—Devices having a fixed receptable with rotating tools, some or all of these tools being rolls or balls loosely mounted on their axis or loose balls in contact with the side wall or the bottom of the receptacle, e.g. with aerating means; "Devices of the Muller type"
- B22C5/0427—Devices having a fixed receptable with rotating tools, some or all of these tools being rolls or balls loosely mounted on their axis or loose balls in contact with the side wall or the bottom of the receptacle, e.g. with aerating means; "Devices of the Muller type" having only one vertical tool-driving shaft
Abstract
The invention discloses a sand mixer for casting, and relates to the technical field of casting equipment; the sand mixer comprises a sand mixer main body, a rotating shaft is rotatably arranged in the sand mixer main body, a sleeve rotating along with the rotating shaft is sleeved outside the rotating shaft, and a reciprocating mechanism for driving the sleeve to reciprocate up and down is arranged between the sleeve and the rotating shaft; a connecting rod is arranged in the rotating shaft in a self-rotating mode, the connecting rod penetrates through the rotating shaft and the sleeve, and stirring blades are fixedly arranged at two ends of the connecting rod respectively; and a hammer for intermittently knocking the main body of the sand mixer is arranged on the outer side of the main body of the sand mixer. The sand mixer has a good mixing effect, and meanwhile, sand is prevented from being stuck to the inner wall of the main body of the sand mixer to influence the mixing effect.
Description
Technical Field
The invention relates to the technical field of casting equipment, in particular to a sand mixer for casting.
Background
The sand mixer is a sand processing device widely applied to the casting industry, and can be divided into the following steps according to the technical characteristics of sand mixing: a rolling wheel type sand mixer mainly applying rolling and rubbing; a blade type sand mixer mainly using mixing action; a reverse flow type or called rotor type sand mixer with rubbing and grinding and mixing functions and a balance wheel type sand mixer with rolling and mixing functions; the sand mixer is also divided into an intermittent sand mixer and a continuous sand mixer according to work.
The sand mixer for casting in the prior art is often generated in the using process, a large amount of sand is adhered to the inner wall of equipment, and then the sand mixing effect is influenced, so that the sand mixer for casting needs to be designed to solve the technical problem.
Disclosure of Invention
The present invention has been made to solve the above-mentioned problems occurring in the background art, and an object of the present invention is to provide a sand mixer for casting.
In order to achieve the purpose, the invention provides the following technical scheme:
a sand mixer for casting comprises a sand mixer main body, a rotating shaft is rotatably arranged in the sand mixer main body, a sleeve rotating along with the rotating shaft is sleeved outside the rotating shaft, and a reciprocating mechanism for driving the sleeve to reciprocate up and down is arranged between the sleeve and the rotating shaft; a connecting rod is arranged in the rotating shaft in a self-rotating mode, the connecting rod penetrates through the rotating shaft and the sleeve, and stirring blades are fixedly arranged at two ends of the connecting rod respectively; and a hammer for intermittently knocking the main body of the sand mixer is arranged on the outer side of the main body of the sand mixer.
As a further scheme of the invention: the sleeve is internally provided with a plurality of sliders, and the sliders are arranged in sliding grooves on the outer side of the rotating shaft in a sliding mode.
As a still further scheme of the invention: the inside mounting groove that is provided with of axis of rotation, the inside both sides fixed mounting of mounting groove has the rack, both sides the rack respectively with two A gear engagement that the connecting rod outside cover was put.
As a still further scheme of the invention: the connecting rod rotates and is installed inside the installation sleeve, the installation sleeve fixedly installs the telescopic both sides, the connecting rod passes through the bearing and installs inside the installation sleeve.
As a still further scheme of the invention: the reciprocating mechanism comprises a driving disc and a driven ring, wherein the driving disc is sleeved outside the rotating shaft, the driven ring is fixedly installed on the sleeve, the driven ring is sleeved outside the rotating shaft, two driving rods are fixedly arranged at the bottom of the driving disc, the two driving rods abut against the driven ring, a plurality of arc-shaped bulges are symmetrically arranged on the driven ring, and the two driven rings are arranged on the moving tracks of the arc-shaped bulges; the driving disc is fixedly installed on the sand mixer main body, an elastic piece A is sleeved on the rotating shaft, one end of the elastic piece A is fixedly installed on the rotating shaft, and the other end of the elastic piece A is fixedly installed on the sleeve.
As a still further scheme of the invention: the lower end of the rotating shaft penetrates through the bottom of the sand mixer main body, and a reciprocating driving part for driving the rotating shaft to rotate in a reciprocating mode is further arranged on the sand mixer main body.
As a still further scheme of the invention: the reciprocating driving part comprises a gear B fixedly sleeved at the lower end of the rotating shaft, incomplete gears are respectively meshed with two sides of the gear B, the incomplete gears on two sides are respectively in transmission connection with motors on two sides of the bottom of the main body of the sand mixer, the incomplete gears on two sides are in the same steering direction, the installation directions of the incomplete gears are the same, and the incomplete degree of the incomplete gears is less than 120 degrees.
As a still further scheme of the invention: and a driving part for driving the hammer to reciprocate.
As a still further scheme of the invention: the driving part comprises an elliptical wheel sleeved at the upper end of the rotating shaft, the rotating shaft penetrates through the top of the main body of the sand mixer, moving blocks in intermittent elastic contact with the elliptical wheel are arranged on two sides of the elliptical wheel, a sliding rod is fixedly mounted on the moving blocks, the sliding rod penetrates through the through holes in the sliding seat in a sliding mode, the sliding rod is far away from one end of the moving block, the movable block is fixedly mounted on the connecting piece, a B elastic piece is sleeved on the outer side of the sliding rod, one end of the B elastic piece is fixedly mounted on the sliding seat, and the other end of the.
As a still further scheme of the invention: the elastic piece B is made of a spring.
Compared with the prior art, the invention has the beneficial effects that: materials to be mixed are added into the main body of the sand mixer through the feeding hole, the motors on two sides are electrified, so that the incomplete gears on two sides drive the gears B to drive the rotating shaft to rotate in a reciprocating mode, the driven ring on the sleeve vibrates in a reciprocating mode up and down under the driving of the driving disc when the rotating shaft rotates, the sleeve drives the stirring blades to vibrate up and down in the rotating and stirring process through the connecting rods, the connecting rods are rotatably installed in the installation sleeve, the gear A on the connecting rods drives the connecting rods to rotate in a self-rotating mode under the action of the racks to drive the stirring blades to rotate in a self-rotating mode to mix, and in sum, the stirring blades are matched with one another in a vertical vibrating mode, a reciprocating rotating mode and a self-rotating mode; meanwhile, the rotating shaft drives the hammer to strike the main body of the sand mixer in a reciprocating manner through the elliptical wheel, the moving block, the sliding rod, the connecting piece and the B elastic piece, so that sand is prevented from being adhered to the inner wall of the main body of the sand mixer, and the mixing effect is prevented from being influenced; the rotating shaft drives the elliptical wheel, so that the structure is more compact. The sand mixer has a good mixing effect, and meanwhile, sand is prevented from being stuck to the inner wall of the main body of the sand mixer to influence the mixing effect.
Drawings
FIG. 1 is a schematic structural view of a kneading machine for casting according to example 1.
Fig. 2 is a schematic structural view of a rotary shaft in a sand mixer for casting.
FIG. 3 is a schematic view showing the structure of a sleeve in a sand mixer for casting.
FIG. 4 is a schematic view showing the structure of a drive plate in a sand mixer for casting.
FIG. 5 is a schematic view showing the structure of a passive ring in a sand mixer for casting.
FIG. 6 is a schematic view showing the structure of an elliptical wheel in a sand mixer for casting.
In the figure: 1-sand mixer main body, 2-stirring blade, 3-connecting rod, 4-mounting sleeve, 5-mounting groove, 6-rotating shaft, 7-rack, 8-A elastic element, 9-sleeve, 10-elliptical wheel, 11-driving disk, 12-A gear, 13-driven ring, 14-connecting element, 15-sliding seat, 16-B elastic element, 17-moving block, 18-sliding rod, 19-arc bulge, 20-sliding piece, 21-sliding groove, 22-discharge port, 23-hammer, 24-B gear, 25-incomplete gear, 26-motor, 27-feed port and 28-driving rod.
Detailed Description
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 1, in embodiment 1 of the present invention, a sand mixer for casting includes a sand mixer main body 1, a rotating shaft 6 rotatably disposed inside the sand mixer main body 1, a sleeve 9 rotating along with the rotating shaft 6 is sleeved outside the rotating shaft 6, and a reciprocating mechanism for driving the sleeve 9 to reciprocate up and down is disposed between the sleeve 9 and the rotating shaft 6; the connecting rod 3 is arranged inside the rotating shaft 6 in a self-rotating mode, the connecting rod 3 penetrates through the rotating shaft 6 and the sleeve 9, the stirring blades 2 are fixedly mounted at two ends of the connecting rod 3 respectively, the rotating shaft 6 drives the sleeve 9 to rotate, the sleeve 9 drives the stirring blades 2 to mix sand, meanwhile, the sleeve 9 drives the stirring blades 2 to reciprocate up and down to mix sand, the sand mixing effect is improved, and meanwhile, the stirring blades 2 rotate automatically along with the sleeve 9, so that the sand mixing effect is further improved;
the outside of the main body 1 of the sand mixer is provided with a hammer 23 for intermittently knocking the main body 1 of the sand mixer, and the hammer 23 is arranged to knock the main body 1 of the sand mixer, so that sand adhered to the inner wall of the main body 1 of the sand mixer is prevented from influencing the sand mixing effect.
The sleeve 9 is internally provided with a plurality of sliders 20, the plurality of sliders 20 are slidably arranged in sliding grooves 21 outside the rotating shaft 6, the arrangement is such that the sleeve 9 can be slidably arranged outside the rotating shaft 6, and the number of the sliders 20 is two.
Example 2
Referring to fig. 1 to 6, the main difference between the present embodiment 2 and the present embodiment 1 is that a mounting groove 5 is disposed inside the rotating shaft 6, racks 7 are fixedly mounted on two sides inside the mounting groove 5, the racks 7 on two sides are respectively engaged with two a gears 12 sleeved outside the connecting rod 3, the connecting rod 3 moves up and down along with the sleeve 9, and the a gears 12 are engaged with the racks 7, so that the a gears 12 drive the connecting rod 3 and the stirring blades 2 to rotate, and further the stirring blades 2 rotate along with the sleeve 9 and rotate by themselves, thereby improving the sand mixing effect.
Connecting rod 3 rotates and installs inside installation cover 4, the both sides of 4 fixed mounting sleeves 9 of installation cover, connecting rod 3 passes through the bearing and installs inside installation cover 4, is used for rotating the support to connecting rod 3 through setting up installation cover 4.
The reciprocating mechanism comprises a driving disc 11 sleeved outside the rotating shaft 6 and a driven ring 13 fixedly installed on the sleeve 9, the driven ring 13 is sleeved outside the rotating shaft 6, two driving rods 28 are fixedly arranged at the bottom of the driving disc 11, the two driving rods 28 abut against the driven ring 13, a plurality of arc-shaped bulges 19 are symmetrically arranged on the driven ring 13, and the two driven rings 13 are arranged on the moving tracks of the arc-shaped bulges 19; the driving-disc 11 fixed mounting is on roller mill main part 1, it has A elastic component 8 still to cover on axis of rotation 6, 8 one end fixed mounting of A elastic component is on axis of rotation 6, other end fixed mounting is on sleeve 9, passive ring 13 rotates along with sleeve 9, the protruding 19 intermittent conflict of arc on the passive ring 13 to actuating lever 28 for sleeve 9 moves down, sleeve 9 is under A elastic component 8's effect when protruding 19 roll-offs from actuating lever 28, sleeve 9 resumes to original position, above-mentioned setting and then makes sleeve 9 reciprocate at the rotation in-process.
The lower end of the rotating shaft 6 penetrates through the bottom of the sand mixer main body 1, and a reciprocating driving part for driving the rotating shaft 6 to rotate in a reciprocating mode is further arranged on the sand mixer main body 1.
The reciprocating driving part comprises a B gear 24 fixedly sleeved at the lower end of the rotating shaft 6, incomplete gears 25 are respectively meshed with two sides of the B gear 24, the incomplete gears 25 on the two sides are respectively in transmission connection with motors 26 on two sides of the bottom of the main body 1 of the sand mixer, the incomplete gears 25 on the two sides rotate in the same direction, the installation directions of the incomplete gears are the same, and the incomplete degree of the incomplete gears is less than 120 degrees. The incomplete gears 25 on the two sides are intermittently meshed with the gear B24 to drive the gear B24 to rotate in a reciprocating manner, so that the rotating shaft 6 drives the stirring blades 2 to rotate in a reciprocating manner to mix sand.
And a driving means for driving the hammer 23 to reciprocate.
The driving part comprises an elliptical wheel 10 sleeved at the upper end of a rotating shaft 6, the rotating shaft 6 penetrates through the top of the sand mixer main body 1, moving blocks 17 intermittently and elastically contacted with the elliptical wheel 10 are arranged on two sides of the elliptical wheel 10, a sliding rod 18 is fixedly installed on the moving blocks 17, the sliding rod 18 penetrates through a through hole in a sliding seat 15 in a sliding mode, one end, far away from the moving blocks 17, of the sliding rod 18 is fixedly installed on a connecting piece 14, a hammer 23 is installed on the connecting piece 14, a B elastic piece 16 is sleeved on the outer side of the sliding rod 18, one end of the B elastic piece 16 is fixedly installed on the sliding seat 15, the other end of the B elastic piece is fixedly installed on the moving blocks 17, the sliding rod 18 drives the connecting piece; the elliptical wheel 10 rotates along with the rotating shaft 6, when the long axis position on the elliptical wheel 10 is in contact with the moving block 17, the moving blocks 17 on two sides are driven to move outwards, further, the sliding rod 18, the connecting piece 14 and the hammer 23 are driven to move outwards, when the elliptical wheel 10 rotates to the short axis position, the moving block 17 loses contact, under the action of the B elastic piece 16, the sliding rod 18, the connecting piece 14 and the hammer 23 are close to the sand mixer main body 1 rapidly, the sand mixer main body 1 is knocked, and sand is prevented from being adhered to the inner wall of the sand mixer main body 1. The elliptical wheel 10 is fixedly arranged on the rotating shaft 6, so that the structure is more compact.
The B elastic member 16 is made of a spring, and this arrangement is easy to realize.
The upper end of the main body 1 of the sand mixer is provided with a feed inlet 27 for adding materials into the main body 1 of the sand mixer, the bottom of the main body 1 of the sand mixer is also provided with a discharge outlet 22, and the discharge outlet 22 is arranged to facilitate discharging the materials.
The working principle of the invention is as follows: materials to be mixed are added into the sand mixer main body 1 through the feeding hole 27, the motors 26 on the two sides are electrified, so that the incomplete gears 25 on the two sides drive the B gear 24 to drive the rotating shaft 6 to rotate in a reciprocating manner, the rotating shaft 6 rotates, the driven ring 13 on the sleeve 9 drives the sleeve 9 to vibrate up and down in a reciprocating manner under the driving of the driving disc 11, the sleeve 9 drives the stirring blades 2 to vibrate up and down in the rotating and stirring process through the connecting rod 3, meanwhile, the connecting rod 3 is rotatably installed in the installation sleeve 4, the A gear 12 on the connecting rod 3 drives the connecting rod 3 to rotate by itself under the action of the rack 7, the stirring blades 2 are driven to rotate by itself to mix, and in conclusion, the stirring blades 2 mix sand through the vertical vibration, the reciprocating rotation and the self-rotation in the mixing process, the disturbance; meanwhile, the rotating shaft 6 drives the hammer 23 to strike the main body 1 of the sand mixer in a reciprocating manner through the elliptical wheel 10, the moving block 17, the sliding rod 18, the connecting piece 14 and the B elastic piece 16, so that sand is prevented from adhering to the inner wall of the main body 1 of the sand mixer, and the mixing effect is prevented from being influenced; the rotating shaft 6 drives the elliptical wheel 10 to be arranged, and the structure is more compact. The sand mixer has a good mixing effect, and meanwhile, sand is prevented from being stuck to the inner wall of the main body 1 of the sand mixer to influence the mixing effect.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.
Claims (10)
1. A sand mixer for casting comprises a sand mixer main body (1), a rotating shaft (6) is rotatably arranged in the sand mixer main body (1), a sleeve (9) rotating along with the rotating shaft (6) is sleeved on the outer side of the rotating shaft (6), and a reciprocating mechanism for driving the sleeve (9) to reciprocate up and down is arranged between the sleeve (9) and the rotating shaft (6); the stirring device is characterized in that a connecting rod (3) is arranged in the rotating shaft (6) in a self-rotating mode, the connecting rod (3) penetrates through the rotating shaft (6) and the sleeve (9), and stirring blades (2) are fixedly arranged at two ends of the connecting rod (3) respectively; and a hammer (23) for intermittently knocking the sand mixer main body (1) is arranged on the outer side of the sand mixer main body (1).
2. A casting mixer according to claim 1, characterized in that a plurality of slides (20) are provided inside the sleeve (9), the plurality of slides (20) being slidably arranged in sliding slots (21) outside the rotating shaft (6).
3. The sand mixer for casting according to claim 2, wherein the rotating shaft (6) is internally provided with a mounting groove (5), racks (7) are fixedly mounted on two sides in the mounting groove (5), and the racks (7) on two sides are respectively meshed with two A gears (12) sleeved on the outer side of the connecting rod (3).
4. A foundry mill according to claim 3, characterized in that the connecting rod (3) is rotatably mounted inside a mounting sleeve (4), the mounting sleeve (4) fixing both sides of a mounting sleeve (9).
5. The sand mixer for casting according to claim 1, wherein the reciprocating mechanism comprises a driving disc (11) sleeved outside the rotating shaft (6) and a driven ring (13) fixedly installed on the sleeve (9), the driven ring (13) is sleeved outside the rotating shaft (6), two driving rods (28) are fixedly arranged at the bottom of the driving disc (11), the two driving rods (28) abut against the driven ring (13), a plurality of arc-shaped protrusions (19) are symmetrically arranged on the driven ring (13), and the two driven rings (13) are arranged on the moving tracks of the arc-shaped protrusions (19); the driving disc (11) is fixedly installed on the sand mixer main body (1), the rotating shaft (6) is further sleeved with an elastic piece A (8), one end of the elastic piece A (8) is fixedly installed on the rotating shaft (6), and the other end of the elastic piece A (8) is fixedly installed on the sleeve (9).
6. The sand mixer for casting according to claim 1, wherein the lower end of the rotating shaft (6) is provided through the bottom of the sand mixer main body (1), and a reciprocating driving part for driving the rotating shaft (6) to rotate in a reciprocating manner is further provided on the sand mixer main body (1).
7. The sand mixer for casting according to claim 6, wherein the reciprocating driving part comprises a B gear (24) fixedly sleeved at the lower end of the rotating shaft (6), incomplete gears (25) are respectively meshed at two sides of the B gear (24), the incomplete gears (25) at two sides are respectively in transmission connection with motors (26) at two sides of the bottom of the main body (1) of the sand mixer, the incomplete gears (25) at two sides rotate in the same direction, the installation directions of the incomplete gears are the same, and the degree of incomplete gear is less than 120 degrees.
8. A foundry mixer according to any one of claims 1 to 7, further comprising a driving unit for driving the hammer (23) to reciprocate.
9. The roller mill for casting according to claim 8, characterized in that the driving part comprises an elliptical wheel (10) sleeved at the upper end of a rotating shaft (6), the rotating shaft (6) penetrates through the top of the roller mill main body (1), moving blocks (17) in intermittent elastic contact with the rotating shaft are arranged on two sides of the elliptical wheel (10), a sliding rod (18) is fixedly installed on the moving blocks (17), the sliding rod (18) penetrates through a through hole in the sliding base (15) in a sliding mode, one end of the sliding rod (18) far away from the moving blocks (17) is fixedly installed on the connecting piece (14), a B elastic piece (16) is sleeved on the outer side of the sliding rod (18), one end of the B elastic piece (16) is fixedly installed on the sliding base (15), and the other end of the B elastic piece is fixedly installed on the moving blocks (17).
10. A casting roller according to claim 9, characterized in that said B elastic member (16) is made of a spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010199881.XA CN111331073A (en) | 2020-03-20 | 2020-03-20 | Sand mixer for casting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010199881.XA CN111331073A (en) | 2020-03-20 | 2020-03-20 | Sand mixer for casting |
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| Publication Number | Publication Date |
|---|---|
| CN111331073A true CN111331073A (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010199881.XA Pending CN111331073A (en) | 2020-03-20 | 2020-03-20 | Sand mixer for casting |
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| CN (1) | CN111331073A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112475221A (en) * | 2020-11-04 | 2021-03-12 | 王月 | Self-grinding side-turning casting sand mixer |
| CN114769504A (en) * | 2022-04-12 | 2022-07-22 | 苏州市通润机械铸造有限公司 | Pretreatment device of sand for sand casting processing |
| CN116078264A (en) * | 2023-04-07 | 2023-05-09 | 东营海瑞宝新材料有限公司 | Diethyl toluenediamine production device and production method based on intermittent impurity removal |
| CN117259734A (en) * | 2023-11-22 | 2023-12-22 | 江苏祥荣机械制造有限公司 | Sand casting shakeout equipment for shaft sleeve sand mould |
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Application publication date: 20200626 |