CN217098844U - Combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastic - Google Patents
Combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastic Download PDFInfo
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- CN217098844U CN217098844U CN202220578210.9U CN202220578210U CN217098844U CN 217098844 U CN217098844 U CN 217098844U CN 202220578210 U CN202220578210 U CN 202220578210U CN 217098844 U CN217098844 U CN 217098844U
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Abstract
The utility model discloses a combination screw rod of calcium sulfate whisker/calcium carbonate composite modification plastics processing usefulness solves the extrusion molding processing that prior art can't guarantee high calcium sulfate whisker content system and destroys the technical problem of the reinforcing of the unable full play calcium sulfate whisker of toughening effect that leads to seriously to calcium sulfate whisker to the draw ratio of calcium sulfate whisker. The utility model comprises two mutually meshed screw rods, wherein each screw rod comprises a mandrel and thread elements distributed on the mandrel; the screw element comprises a conveying block and a kneading block, and the screw element is formed with a conveying section, a mixing section, an exhaust section, a calcium sulfate whisker mixing section and a homogenizing section which are connected in sequence on the mandrel. The utility model is used for producing calcium sulfate whisker/calcium carbonate composite modified plastics, the material mixes effectually, and calcium sulfate whisker and calcium carbonate dispersion are even, satisfy the stability of high calcium sulfate whisker content modified plastics and extrude, and the vacuum port does not emit the material, and is little to the destruction of calcium sulfate whisker simultaneously, full play calcium sulfate whisker's reinforcing toughening effect.
Description
Technical Field
The utility model belongs to the technical field of plastics extrusion molding processing equipment, concretely relates to combination screw rod of calcium sulfate whisker/calcium carbonate composite modification plastics processing usefulness.
Background
The calcium sulfate whisker is a micro-nano short fiber grown by high-purity single crystal, and has the characteristics of high strength and high modulus. The calcium sulfate whisker has large length-diameter ratio and obvious reinforcing and toughening effects, and the rigidity, toughness and heat resistance of the material can be obviously improved by compounding the calcium sulfate whisker and calcium carbonate modified plastic. However, the existing processing technology, especially the twin-screw combination, is not suitable for extrusion molding processing of calcium sulfate whisker/calcium carbonate composite modified plastics, on one hand, extrusion molding processing of a high calcium sulfate whisker content system cannot be guaranteed, and on the other hand, the length-diameter ratio of the calcium sulfate whisker is seriously damaged, so that the reinforcing and toughening effects of the calcium sulfate whisker cannot be fully exerted.
Therefore, a combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastics is needed to overcome the technical problems.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: provides a combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastics, which at least solves part of technical problems.
In order to achieve the above object, the utility model adopts the following technical scheme:
a combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastics comprises two mutually meshed screws, wherein each screw comprises a mandrel and threaded elements distributed on the mandrel; the screw element comprises a conveying block and a kneading block, and the screw element is formed with a conveying section, a mixing section, an exhaust section, a calcium sulfate whisker mixing section and a homogenizing section which are connected in sequence on the mandrel.
Further, the conveying blocks comprise forward conveying blocks and reverse conveying blocks, and the kneading blocks comprise K-type kneading blocks and M-type kneading blocks.
Furthermore, the conveying section comprises a plurality of conveying blocks, and the screw element leads of the conveying section are distributed from small to large and then from large to small from the conveying section to the mixing section; the conveying blocks forming the conveying section at least comprise an SK type conveying block.
Further, the mixing section comprises a plurality of kneading blocks and a plurality of conveying blocks, the mixing section comprises a first kneading area, a second kneading area and a third kneading area which are sequentially distributed from the mixing section to the exhaust section, the first kneading area comprises two kneading blocks, the second kneading area and the third kneading area comprise one kneading block, and at least one conveying block is arranged between every two adjacent groups of kneading areas forming the mixing section at intervals.
Further, the mixing section at least comprises 3 kneading areas consisting of kneading blocks and conveying blocks.
Further, the exhaust section comprises a plurality of conveying blocks, and the screw element lead of the exhaust section is distributed from large to small from the exhaust section to the mixing section of the calcium sulfate whisker.
Further, the calcium sulfate whisker mixing section comprises a plurality of kneading blocks and a plurality of conveying blocks, and at least one conveying block is arranged between two adjacent groups of kneading blocks forming the calcium sulfate whisker mixing section at intervals; the calcium sulfate whisker mixing section at least comprises a kneading block with an offset angle of 60 degrees, and the tail end of the calcium sulfate whisker mixing section at least comprises a TME type threaded element.
Further, the mixing section of the calcium sulfate whisker at least comprises 2 kneading areas consisting of kneading blocks and conveying blocks.
Further, the homogenization section comprises a plurality of conveying blocks, and the screw element lead of the homogenization section is connected with one end of the calcium sulfate whisker mixing section to the other end of the homogenization section from large to small.
Further, a phase angle of 90 ° is provided between the two screws.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model has the advantages of simple structure and scientific and reasonable design, convenient to use for producing calcium sulfate whisker/calcium carbonate composite modification plastics, the material mixes effectually, and calcium sulfate whisker and calcium carbonate dispersion are even, satisfy the stable extrusion of high calcium sulfate whisker content modified plastics, and the vacuum port does not emit the material, and is little to the destruction of calcium sulfate whisker simultaneously, full play calcium sulfate whisker's reinforcing toughening effect.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Wherein, the names corresponding to the reference numbers are:
1-conveying section, 2-mixing section, 3-exhausting section, 4-calcium sulfate whisker mixing section, 5-homogenizing section, 6-screw and 7-mandrel.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in figure 1, the utility model provides a pair of combination screw rod of calcium sulfate whisker/calcium carbonate composite modification plastics processing usefulness, simple structure, design scientific and reasonable, convenient to use for producing calcium sulfate whisker/calcium carbonate composite modification plastics, the material mixes effectually, calcium sulfate whisker and calcium carbonate dispersion are even, satisfy the stability of high calcium sulfate whisker content modified plastics and extrude, the vacuum port does not emit the material, it is little to the destruction of calcium sulfate whisker simultaneously, full play calcium sulfate whisker's reinforcing toughening effect. The utility model comprises two mutually meshed screw rods 6, wherein each screw rod 6 comprises a mandrel 7 and thread elements distributed on the mandrel 7; the screw element comprises a conveying block and a kneading block, and the screw element is formed with a conveying section 1, a mixing section 2, a degassing section 3, a calcium sulfate whisker mixing section 4 and a homogenizing section 5 which are connected in sequence on a mandrel 7. The conveying blocks comprise forward conveying blocks and reverse conveying blocks, and the kneading blocks comprise K-type kneading blocks and M-type kneading blocks. The conveying section 1 comprises a plurality of conveying blocks, and the screw element leads of the conveying section 1 are distributed from small to large and then from large to small from the conveying section 1 to the mixing section 2; the transport blocks forming the transport section 1 comprise at least one SK type transport block. The utility model discloses mixing section 2 includes a plurality of kneading blocks and a plurality of transport block, mixing section 2 includes from mixing section 2 to 3 direction order distribution's of exhaust section first kneading district, second kneading district and third kneading district, and first kneading district comprises two kneading blocks, and second kneading district and third kneading district comprise one kneading block, have a transport block at least at the interval between two sets of adjacent kneading districts of constituteing mixing section 2; the mixing section 2 at least comprises 3 kneading zones consisting of kneading blocks and conveying blocks.
The utility model discloses exhaust section 3 includes a plurality of transport blocks, and the screw element helical pitch of exhaust section 3 distributes from big to little from exhaust section 3 to the mixed section 4 directions of calcium sulfate whisker. The calcium sulfate whisker mixing section 4 of the utility model comprises a plurality of kneading blocks and a plurality of conveying blocks, and at least one conveying block is arranged between two adjacent kneading blocks which form the calcium sulfate whisker mixing section 4; the calcium sulfate whisker mixing section 4 at least comprises 2 sections of kneading areas consisting of kneading blocks and conveying blocks; the calcium sulfate whisker mixing section 4 at least comprises a kneading block with an offset angle of 60 degrees, and the tail end of the calcium sulfate whisker mixing section 4 at least comprises a TME type threaded element. Homogenization section 5 includes a plurality of transport blocks, and the screw element helical pitch of homogenization section 5 is connected with the mixed section 4 of calcium sulfate whisker one end to 5 other ends of homogenization section from big to little distribution on homogenization section 5. The utility model discloses have 90 phase angles between two screw rods 6.
The utility model discloses an adjustment different specifications are carried the piece and are kneaded the piece and constitute different permutation and combination at the screw rod spindle, adopt this combination screw rod production calcium sulfate whisker calcium carbonate composite modified plastics, and the material mixes effectually, and calcium sulfate whisker and calcium carbonate dispersion are even, and is little to the destruction of calcium sulfate whisker simultaneously, full play calcium sulfate whisker's reinforcing toughening effect.
In order to make those skilled in the art understand the technical solution of the present invention more intuitively, the following examples are provided for further detailed explanation.
As shown in figure 1, only one screw is shown in figure 1, the combined screw for processing the calcium sulfate whisker/calcium carbonate composite modified plastic comprises a mandrel and a threaded element on the mandrel. The screw comprises a conveying section 1, a mixing section 2, an exhaust section 3, a calcium sulfate whisker mixing section 4 and a homogenizing section 5; the conveying section, the mixing section, the exhaust section, the calcium sulfate whisker mixing section and the homogenizing section are sequentially connected from left to right and are integrated into a whole.
The utility model discloses carry section 1 to include following screw element from a left side to the right side in proper order: SE56/56A, SE72/72SK, SE72/72SK, SE72/72SK, SE64/64, SE64/64, SE56/56 and SE 56/56. Wherein SE56/56A denotes a positive feed block with a lead of 56mm and a length of 56mm, a denotes the first block screw block, SE72/72SK denotes an SK-type feed block with a lead of 72mm and a length of 72mm, and the rest of the screw elements can be analogized. The effect of transport section is that send into the screw rod smoothly with the material of feed opening, simultaneously with material compaction, heating, the material has been avoided piling up at the feed opening to big helical pitch transport block, and calcium carbonate can take place to show volume expansion after being heated, and the SK type transport block has improved conveying capacity on the one hand, and on the other hand has solved calcium carbonate volume expansion and has carried the disturbance to the material, and screw rod helical pitch reduces gradually behind the SK type transport block, sends into mixing section with the material compaction.
The utility model discloses mixing section 2 includes following screw element from a left side to the right side in proper order: KB30/7/72, KB45/5/56, SE56/56, SE44/44, KB45/5/56, SE56/56, SE44/44, KB45/5/56, SE56/56, SE44/44, KB90/5/56, SE 44/22L. KB30/7/72 shows a forward kneading block with an offset angle of 30 °, a kneading disc number of 7 and a length of 72mm, and so on, SE44/22L shows a reverse conveying block with a lead of 44mm and a length of 22 mm. The mixing section 2 is used for melting and mixing materials, uniformly mixing additives with completely molten resin, and consists of three groups of kneading zones, wherein the first kneading zone consists of two kneading blocks, the second kneading zone and the third kneading zone consist of one kneading block, the three groups of kneading zones are separated by one group of conveying zones, the materials are properly loosened, the first kneading zone consists of KB30/7/72 and KB45/5/56, the materials are compressed and completely molten, the second kneading zone and the third kneading zone consist of KB45/5/56 respectively, the materials are further uniformly mixed, wherein the shearing force of 30-degree kneading blocks is weaker, the shearing force of the 30-degree kneading blocks is used as a transition element to preliminarily compress the materials in the conveying zone, the sudden increase of viscosity when calcium carbonate is excessively cut, the shearing force of 45-degree kneading blocks is strong, the dispersion of the materials can be effectively improved, the shearing force of the 90-degree kneading blocks is large, but the retention time of the materials is long, therefore, the 45-degree kneading blocks are mainly used in the section, and the 90-degree kneading blocks and the reverse conveying blocks are only used at the tail of the section to prolong the retention time of the materials, so that the dispersion of the materials is further enhanced.
The utility model discloses exhaust section 3 includes following screw element from a left side to the right side in proper order: SE72/72, SE72/72, SE72/72, SE64/64, SE64/64, SE56/56, SE56/56, SE44/44 and SE 44/44. The function of the exhaust section 3 is to exhaust small molecular volatile components in the melt and to add calcium sulfate whiskers from a side feeding port. The part big lead screw element before this section can increase exhaust area, effectively gets rid of volatile components such as moisture, and the same is compacted with the fuse-element after the lead reduces step by step, sends into calcium sulfate whisker mixing section 4 smoothly with the calcium sulfate whisker.
The utility model discloses the mixing section 4 of calcium sulfate whisker includes following screw element from a left side to the right side in proper order: KB30/7/56, SE64/64, SE56/56, SE44/44, KB60/4/44, SE64/64, SE64/64, SE56/56, KB60/4/44, SE56/56, SE56/56, TME18, SE 44/22L. Where TME18 represents a TME module of 18mm in length. The calcium sulfate whisker mixing section 4 has the functions of uniformly dispersing calcium sulfate whiskers in a melt and simultaneously avoiding the reduction of the length-diameter ratio of the calcium sulfate whiskers, and a first 30-degree kneading block and three conveying blocks in the first section of the calcium sulfate whisker mixing section 4 form a first kneading area which is mainly used for compacting materials and avoiding the influence of air brought by the calcium sulfate whiskers on the stable flow of the melt; the second kneading zone and the third kneading zone are composed of 60-degree kneading blocks and conveying blocks, so that the distribution and mixing of calcium sulfate whiskers in a melt are effectively improved, calcium carbonate and calcium sulfate whiskers are uniformly mixed, the material retention time is prolonged by the TME18 and the reverse conveying blocks at the end of the calcium sulfate whisker mixing section 4, and the uniform mixing degree of materials is further enhanced by the TME module.
The utility model discloses homogenization section 5 includes following screw element from a left side to the right side in proper order: SE72/72, SE72/72, SE72/72, SE64/64, SE64/64, SE56/56, SE56/56, SE44/44 and SE 44/44. The homogenizing section 5 has the functions of gradually compressing the melt, establishing melt pressure to ensure the stable discharging of the neck mold and removing volatile components from the material through the vacuum port. The homogenizing section 5 is provided with a large-lead screw element for increasing degassing area and improving the extraction effect of the vacuum port, and the lead is gradually reduced to gradually compact the materials to build melt pressure and further improve the mixing of the materials.
Screw rod combination total length is 2862mm, and two screw rod structures are the same and have 90 phase angles.
Finally, it should be noted that: the above embodiments are only preferred embodiments of the present invention to illustrate the technical solution of the present invention, but not to limit the same, and certainly not to limit the scope of the present invention; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention; that is, the technical problems solved by the present invention are still consistent with the present invention and should be included in the protection scope of the present invention, even though there is no substantial change or retouching made in the design concept and spirit of the main body of the present invention; in addition, will the technical scheme of the utility model direct or indirect application is in other relevant technical field, all including on the same principle the utility model discloses a within the patent protection scope.
Claims (10)
1. A combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastics comprises two screws (6) which are meshed with each other, and is characterized in that the screws (6) comprise mandrels (7) and thread elements distributed on the mandrels (7); the screw element comprises a conveying block and a kneading block, and the screw element is formed with a conveying section (1), a mixing section (2), an exhaust section (3), a calcium sulfate whisker mixing section (4) and a homogenizing section (5) which are connected in sequence on a mandrel (7).
2. The combination screw for processing calcium sulfate whisker/calcium carbonate composite modified plastics according to claim 1, wherein the conveying blocks comprise forward conveying blocks and reverse conveying blocks, and the kneading blocks comprise K-type kneading blocks and M-type kneading blocks.
3. The combined screw for processing the calcium sulfate whisker/calcium carbonate composite modified plastic according to claim 1, wherein the conveying section (1) comprises a plurality of conveying blocks, and the lead of the thread element of the conveying section (1) is distributed from small to large and then from large to small from the direction from the conveying section (1) to the mixing section (2); the conveying blocks forming the conveying section (1) at least comprise an SK type conveying block.
4. The combined screw for processing the calcium sulfate whisker/calcium carbonate composite modified plastic according to claim 1, wherein the mixing section (2) comprises a plurality of kneading blocks and a plurality of conveying blocks, the mixing section (2) comprises a first kneading area, a second kneading area and a third kneading area which are sequentially distributed from the mixing section (2) to the exhaust section (3), the first kneading area consists of two kneading blocks, the second kneading area and the third kneading area consist of one kneading block, and at least one conveying block is arranged between two adjacent groups of kneading areas which form the mixing section (2).
5. The combined screw for processing the calcium sulfate whisker/calcium carbonate composite modified plastic is characterized in that the mixing section (2) at least comprises 3 kneading blocks consisting of kneading blocks and conveying blocks.
6. The combined screw for processing the calcium sulfate whisker/calcium carbonate composite modified plastic according to claim 1, wherein the exhaust section (3) comprises a plurality of conveying blocks, and the lead of the thread elements of the exhaust section (3) is distributed from large to small from the exhaust section (3) to the mixing section (4) of the calcium sulfate whisker.
7. The combined screw for processing the calcium sulfate whisker/calcium carbonate composite modified plastic according to claim 1, wherein the calcium sulfate whisker mixing section (4) comprises a plurality of kneading blocks and a plurality of conveying blocks, and at least one conveying block is arranged between two adjacent groups of kneading blocks which form the calcium sulfate whisker mixing section (4); the calcium sulfate whisker mixing section (4) at least comprises a kneading block with an offset angle of 60 degrees, and the tail end of the calcium sulfate whisker mixing section (4) at least comprises a TME type threaded element.
8. The combined screw for processing the calcium sulfate whisker/calcium carbonate composite modified plastic according to claim 7, wherein the calcium sulfate whisker mixing section (4) at least comprises 2 kneading blocks consisting of kneading blocks and conveying blocks.
9. The combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastics according to claim 1, wherein the homogenizing section (5) comprises a plurality of conveying blocks, and the lead of the screw element of the homogenizing section (5) is distributed from one end of the homogenizing section (5) connected with the calcium sulfate whisker mixing section (4) to the other end of the homogenizing section (5) from large to small.
10. The combined screw for processing the calcium sulfate whisker/calcium carbonate composite modified plastic according to claim 1, wherein a phase angle of 90 degrees is formed between the two screws (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220578210.9U CN217098844U (en) | 2022-03-15 | 2022-03-15 | Combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220578210.9U CN217098844U (en) | 2022-03-15 | 2022-03-15 | Combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastic |
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| Publication Number | Publication Date |
|---|---|
| CN217098844U true CN217098844U (en) | 2022-08-02 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220578210.9U Active CN217098844U (en) | 2022-03-15 | 2022-03-15 | Combined screw for processing calcium sulfate whisker/calcium carbonate composite modified plastic |
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| CN (1) | CN217098844U (en) |
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- 2022-03-15 CN CN202220578210.9U patent/CN217098844U/en active Active
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