CN104494797A - Buoyancy stick based on foam materials - Google Patents
Buoyancy stick based on foam materials Download PDFInfo
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- CN104494797A CN104494797A CN201410686365.4A CN201410686365A CN104494797A CN 104494797 A CN104494797 A CN 104494797A CN 201410686365 A CN201410686365 A CN 201410686365A CN 104494797 A CN104494797 A CN 104494797A
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Abstract
The invention relates to a buoyancy stick, and belongs to the technical field of water buoyancy devices. The buoyancy stick comprises a hollow stick body and plugging parts sealed at the two ends of the stick body. The stick body is an EPE foamed pipe molded through extrusion through an extruding machine after high foaming is carried out on LDPE. The buoyancy stick is of a hollow structure, so that materials are saved, and the manufacturing cost is effectively reduced. Due to the fact that the hollow stick body contains more gas, the buoyancy of the buoyancy stick is effectively increased.
Description
Technical field
The present invention relates to a kind of Buoyancy bar, particularly relate to a kind of Buoyancy bar based on expanded material, belong to buoyance in water equipment technical field.
Background technology
The buoyancy device that the place, waters such as swimming pool, spa pool, seashore is commonly used has swimsuit, water wing, buoyancy plate and Buoyancy bar etc.Wherein the most conventional is swimsuit and water wing, these two kinds of buoyancy device utilize to fill to be able to buoyancy in gas wherein, swimsuit needs to be worn in user and is used with it, this can make troubles to the action of user in water and make it increase heavy burden, water wing is easily because being scratched loss of buoyance by sharp thing, and this can bring potential safety hazard to user.Buoyancy plate and Buoyancy bar are also more used in place, waters by people, but buoyancy plate be not easy to user grasp, in use easy because of grasp loosely lose safety guard-safeguard.
Buoyancy bar is because being converted into multiple pattern and using and easy to carry, and be more and more subject to the liking of fan of swimming, but existing Buoyancy bar mostly is solid bar, buoyancy is poor, cost is high.Separately because solid Buoyancy bar is not easy to splicing, people are difficult to multiple solid Buoyancy bar to combinationally use, and the type of service of Buoyancy bar is restricted.
The material that existing Buoyancy bar uses is mostly EPS (Expanded Polystyrene) polystyrene, frangible during this materials'use, yielding and recovery is poor, cannot reclaim after using, thus cause environmental pollution, make its application market will be more and more less.In order to solve the defect that EPS has, someone attempts and is combined to manufacture Buoyancy bar with EPS by fluting board, the advantage such as although corrugated board has environmental protection, easily cuts, cost is low, range of use is wide, but because its surface is harder, wearing and tearing and cut are had to some product surface, difficult formation Three-dimension process product, and humidity effect is comparatively large, overload nerve is poor, so slightly inferior on amortizing packaging material.
Generally speaking, EPS at present uses amortizing packaging material more widely, but does not meet environmental demands, also not solvent resistant and mineral oil, is constantly substituted by other materials in the future; Honeycomb cardboard, carton, paper pallet shortcoming: damage resistibility energy, folding quality, resistance to expose performance etc. poor, processing characteristics is poor, and during production, degree of automation is lower; Printability is poor, non-moistureproof, and cost is high;
Summary of the invention
Technical matters to be solved by this invention provides for the state of the art that a kind of buoyancy is good, the Buoyancy bar of long service life.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of Buoyancy bar, and comprise the barred body of hollow and be sealed in the closeouts at barred body two ends, described barred body is LDPE EPE foaming tube through extruder extrusion forming after high-foaming.
Wherein, the closeouts at described barred body two ends is respectively EPE pearl wool.
Wherein, what described EPE foaming tube had axial cavity and was centered around axial cavity periphery is circular outer ring cavity, and described axial cavity is filled with gas, is filled with light solid material in the cavity of described outer ring.
Wherein, the inwall of described EPE foaming tube is provided with polypropylene composite material layer, the thickness of described EPE foaming tube is 2 ~ 100mm, such as 5mm, 10mm, 20mm, 50mm, 70mm, 80mm, the thickness of described polypropylene composite material layer is 0.1 ~ 10mm, such as 0.2mm, 0.8mm, 1mm, 2mm, 5mm, 7mm, 8mm.
Wherein, described EPE foaming tube is made up of the component of following percentage by weight:
Preferably, described EPE foaming tube is made up of the component of following percentage by weight:
Wherein, described nucleating agent is french talc, and described foaming agent is butane or dichlorodifluromethane, and described antishrinking agent is monoglyceride, and described auxiliary addition agent is color masterbatch and/or antistatic additive.
Wherein, described EPE foaming tube is prepared from by following steps:
(1) plastics processing, adds the first paragraph barrel of extruder respectively, obtains raw material, raw materials melt, complete the plastics processing of raw material by LDPE, nucleating agent, auxiliary addition agent by proportioning;
(2) mixing, by running screw rod, the raw material after plasticizing is clamp-oned the second segment barrel of extruder, respectively foaming agent, antishrinking agent injected second segment barrel by proportioning by measuring pump and mix with raw material, obtaining mixed material;
(3) cooling forming, opens the cooling mechanism of second segment barrel, makes second segment barrel be cooled to design temperature T1, and mixed material is extruded by die head and foamed through die lip, forms EPE foam pipe;
(4) post-processing, the EPE foam pipe extruded is according to after over cooling, traction, and sizing sectility, obtains EPE foaming tube.
Wherein, the preheating of step (1a) extruder was also comprised before step (1), the first paragraph barrel of extruder and the temperature of second segment barrel is made to reach design temperature T2, described first paragraph barrel comprises the firstth district, the secondth district, the 3rd district and the 4th district, and described second segment barrel comprises the 5th district, the 6th district, SECTOR-SEVEN, Section Eight and the 9th district;
Preferably, in step (1a), design temperature T2 is, the first 160 DEG C, district, 185 DEG C, the secondth district, 184 DEG C, the 3rd district, 183 DEG C, the 4th district, 150 DEG C, the 6th district, SECTOR-SEVEN 145 DEG C, Section Eight 145 DEG C, 160 DEG C, the 9th district.
Wherein, in step (1), LDPE, nucleating agent, auxiliary addition agent are joined the firstth district respectively, obtains raw material, described raw material completes plastics processing in the process sent into by screw rod in first paragraph barrel;
Preferably, in step (3), described design temperature T1 is 115 DEG C, the 5th district, 83 DEG C, the 6th district, SECTOR-SEVEN 80 DEG C, Section Eight 80 DEG C, 90 DEG C, the 9th district, and die head temperature is 90 DEG C.
Wherein, in step (2), before by measuring pump antishrinking agent being injected second segment barrel by proportioning, first heated by antishrinking agent with the pressure of 10 ~ 15Mpa, reinject second segment barrel;
Preferably, the control step that step (4) is concrete is, the EPE foam pipe extruded after foaming carries out cooling down by the cooling-air of blower fan, then enters traction, and last sizing sectility, obtains EPE foaming tube.
Compared with prior art, the invention has the advantages that: the barred body of this Buoyancy bar is LDPE EPE foaming tube through extruder extrusion forming after high-foaming, can process buoyant material because EPE foaming tube belongs to light overpressure resistant, be the light composite material of a kind of lower density, high strength; It has that density is little, excellent in mechanical performance, water absorption rate are low and the feature such as stable; Its density range is 0.35 ~ 0.70g/cm
3, therefore there is good fastness to water and buoyancy.
In addition, this Buoyancy bar production technology of EPE foaming tube have employed advanced unit butane physical foaming process, goods expansion ratio height efficient energy-saving; Secondly, EPE foaming tube manufacturing line adopts explosion-proof electric apparatus element, frequency control and intelligent digital displaying meter automatically to control, and operational security is steady, easy to operate, and steady quality is reliable, can the EPE foam pipe of continuous seepage all size.
Accompanying drawing explanation
Fig. 1 is the structural representation of embodiment of the present invention Buoyancy bar;
Fig. 2 is the structural representation view in the disconnected cross section of embodiment of the present invention Buoyancy bar.
Detailed description of the invention
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
The Buoyancy bar of the present embodiment, as depicted in figs. 1 and 2, comprise the barred body of hollow and be sealed in the closeouts 2 at barred body two ends, wherein, barred body is LDPE EPE foaming tube 1 through extruder extrusion forming after high-foaming; Meanwhile, the closeouts 2 being positioned at barred body two ends is also respectively the EPE pearl wool of LDPE through high-foaming aftershaping.The barred body of the Buoyancy bar of the present embodiment and the closeouts 2 at two ends adopt EPE material simultaneously, effectively increase its fastness to water and buoyancy.Barred body can one-body moldedly also can be fixed together by bonding, make etc. with closeouts 2.
In addition, the Buoyancy bar of the present embodiment is hollow structure, namely save material and effectively reduce manufacturing cost, and the barred body of hollow is because of containing more gas, effectively increases its buoyancy.
What EPE foaming tube 1 had axial cavity 6 and was centered around axial cavity 6 periphery is circular outer ring cavity 5, is filled with gas, and is filled with light solid material 4 in outer ring cavity 5 in axial cavity 6.Wherein light solid material 4 should select inexpensive, that buoyancy is good foam occurred frequently, can not reduce barred body buoyancy and not increase on the basis of barred body manufacturing cost like this, strengthens stress and the pressure resistance of Buoyancy bar.The shape of light solid material 4 can be determined according to needs of production, it can be light solid material 4 fragment, it can also be light solid material 4 cylinder matched with cavity shape, light solid material in the present embodiment 4 in cavity shape match cylindric, this has ensured that Buoyancy bar has enough stress and pressure resistance.
Be filled with light solid material 4 in outer ring cavity 5, make Buoyancy bar while the better buoyancy of maintenance, there is stronger compressive strength.
The thickness that the inwall of EPE foaming tube 1 is provided with polypropylene composite material layer 3, EPE foaming tube 1 is 2mm, and the thickness of polypropylene composite material layer 3 is 10mm.Wherein polypropylene composite material layer 3 has corrosion stability and resistance to abrasion, thus extends the service life of Buoyancy bar.
The EPE foaming tube 1 of the present embodiment is made up of the component of following percentage by weight:
Wherein, nucleating agent is french talc, and foaming agent is butane, and antishrinking agent is monoglyceride, and auxiliary addition agent is color masterbatch.
EPE foaming tube is prepared from by following steps:
(1a) extruder preheating, pulse-width regulated heating ring, to maximum power output, makes extruder temperature reach design temperature T2, is heated to design temperature to glycerin ester pot simultaneously---and 100 DEG C; Wherein, design temperature T2 is, the first 160 DEG C, district, 185 DEG C, the secondth district, 184 DEG C, the 3rd district, 183 DEG C, the 4th district, 150 DEG C, the 6th district, SECTOR-SEVEN 145 DEG C, Section Eight 145 DEG C, 160 DEG C, the 9th district.
(1) plastics processing, open feeding motor, be set in slow speed of revolution, simultaneously by formula filling butane and monoglyceride to measuring pump, feed zone two ends are connected with machine barrel and drop-gear box respectively, extruder sent into by raw material thus part, and comprise the parts such as hopper, screw rod, machine barrel, extruder, main motor, alternating current dynamo is connected with main-machine screw by drop-gear box;
By proportioning, LDPE, nucleating agent, auxiliary addition agent are added respectively the first paragraph barrel of extruder, obtain raw material, the high-power heating collar of first paragraph cylinder device, high temperature, by raw materials melt, completes the plastics processing of raw material; First paragraph barrel comprises the firstth district, the secondth district, the 3rd district and the 4th district, and LDPE, nucleating agent, auxiliary addition agent join the firstth district respectively, obtain raw material, and raw material completes plastics processing in the process sent into by screw rod in first paragraph barrel.
(2) mixing, by running screw rod, the raw material after plasticizing is clamp-oned the second segment barrel of extruder, respectively foaming agent, antishrinking agent injected second segment barrel by proportioning by measuring pump and mix with raw material, obtaining mixed material; Second segment barrel comprises the 5th district, the 6th district, SECTOR-SEVEN, Section Eight and the 9th district, and raw material mixes in the 5th district with foaming agent, antishrinking agent.Wherein, antishrinking agent is before injection second segment barrel, first with 10 ~ 15Mpa (i.e. 100 ~ 150mm/cm
2) pressure antishrinking agent is heated.The charging position of butane pump and antishrinking agent pump is provided with check valve, makes the unlikely reverse refluence of raw material, to guarantee production safety.
(3) cooling forming, opens the cooling mechanism of second segment barrel, namely, open second segment barrel cooling water expansion tank electric control valve, make second segment barrel be cooled to design temperature T1, mixed material is extruded by die head and is foamed through die lip, forms EPE foam pipe; Design temperature T1 is 115 DEG C, the 5th district, 83 DEG C, the 6th district, SECTOR-SEVEN 80 DEG C, Section Eight 80 DEG C, 90 DEG C, the 9th district, and die head temperature is 90 DEG C.The caliber of the EPE foam pipe extruded depends primarily on the soon slow of die lip debugging and haulage speed.
(4) post-processing, open initiatively draw gear and receiving mechanism, start foam production, the EPE foam pipe extruded after foaming is according to mould sizing, and the EPE foam pipe extruded after foaming carries out cooling down by the cooling-air of blower fan again, then enters traction, now haulage speed should be kept in balance, to ensure the quality of tubing, nip rolls are equipped with the electrical motor of frequency conversion adjustment, to adjust haulage speed; Size sizing sectility as required, obtains EPE foaming tube 1.
Above content is only preferred embodiment of the present invention, and for those of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, this description should not be construed as limitation of the present invention.
Claims (10)
1. a Buoyancy bar, the barred body comprising hollow and the closeouts (2) being sealed in barred body two ends, is characterized in that: described barred body is the EPE foaming tube (1) through extruder extrusion forming after LDPE high-foaming.
2. Buoyancy bar according to claim 1, is characterized in that: the closeouts (2) at described barred body two ends is respectively EPE pearl wool.
3. Buoyancy bar according to claim 1, it is characterized in that: what described EPE foaming tube (1) had axial cavity (6) and was centered around axial cavity (6) periphery is circular outer ring cavity (5), described axial cavity is filled with gas in (6), is filled with light solid material (4) in described outer ring cavity (5).
4. Buoyancy bar according to claim 1, it is characterized in that: the inwall of described EPE foaming tube (1) is provided with polypropylene composite material layer (3), the thickness of described EPE foaming tube (1) is 2 ~ 100mm, and the thickness of described polypropylene composite material layer (3) is 0.1 ~ 10mm.
5. Buoyancy bar according to claim 1, is characterized in that, described EPE foaming tube (1) is made up of the component of following percentage by weight:
Preferably, described EPE foaming tube (1) is made up of the component of following percentage by weight:
6. Buoyancy bar according to claim 5, is characterized in that: described nucleating agent is french talc, and described foaming agent is butane or dichlorodifluromethane, and described antishrinking agent is monoglyceride, and described auxiliary addition agent is color masterbatch and/or antistatic additive.
7. Buoyancy bar according to claim 5, is characterized in that, described EPE foaming tube (1) is prepared from by following steps:
(1) plastics processing, adds the first paragraph barrel of extruder respectively, obtains raw material, raw materials melt, complete the plastics processing of raw material by LDPE, nucleating agent, auxiliary addition agent by proportioning;
(2) mixing, by running screw rod, the raw material after plasticizing is clamp-oned the second segment barrel of extruder, respectively foaming agent, antishrinking agent injected second segment barrel by proportioning by measuring pump and mix with raw material, obtaining mixed material;
(3) cooling forming, opens the cooling mechanism of second segment barrel, makes second segment barrel be cooled to design temperature T1, and mixed material is extruded by die head and foamed through die lip, forms EPE foam pipe;
(4) post-processing, the EPE foam pipe extruded is after over cooling, traction, and sizing sectility, obtains EPE foaming tube (1).
8. Buoyancy bar according to claim 7, it is characterized in that: before step (1), also comprise the preheating of step (1a) extruder, the first paragraph barrel of extruder and the temperature of second segment barrel is made to reach design temperature T2, described first paragraph barrel comprises the firstth district, the secondth district, the 3rd district and the 4th district, and described second segment barrel comprises the 5th district, the 6th district, SECTOR-SEVEN, Section Eight and the 9th district;
Preferably, in step (1a), design temperature T2 is, the first 160 DEG C, district, 185 DEG C, the secondth district, 184 DEG C, the 3rd district, 183 DEG C, the 4th district, 150 DEG C, the 6th district, SECTOR-SEVEN 145 DEG C, Section Eight 145 DEG C, 160 DEG C, the 9th district.
9. Buoyancy bar according to claim 8, it is characterized in that: in step (1), LDPE, nucleating agent, auxiliary addition agent are joined respectively the firstth district of first paragraph barrel, obtain raw material, described raw material completes plastics processing in the process sent into by screw rod in first paragraph barrel;
Preferably, in step (3), described design temperature T1 is 115 DEG C, the 5th district, 83 DEG C, the 6th district, SECTOR-SEVEN 80 DEG C, Section Eight 80 DEG C, 90 DEG C, the 9th district, and die head temperature is 90 DEG C.
10. Buoyancy bar according to claim 7, is characterized in that: in step (2), and before by measuring pump antishrinking agent being injected second segment barrel by proportioning, first heated by antishrinking agent with the pressure of 10 ~ 15Mpa, reinject second segment barrel;
Preferably, the control step that step (4) is concrete is, the EPE foam pipe extruded after foaming carries out cooling down by the cooling-air of blower fan, then enters traction, and last sizing sectility, obtains EPE foaming tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410686365.4A CN104494797A (en) | 2014-11-25 | 2014-11-25 | Buoyancy stick based on foam materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410686365.4A CN104494797A (en) | 2014-11-25 | 2014-11-25 | Buoyancy stick based on foam materials |
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| Publication Number | Publication Date |
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| CN104494797A true CN104494797A (en) | 2015-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410686365.4A Pending CN104494797A (en) | 2014-11-25 | 2014-11-25 | Buoyancy stick based on foam materials |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105820426A (en) * | 2016-05-20 | 2016-08-03 | 太仓善融信息服务有限公司 | Hard foamed plastic swimming ring |
| CN105820425A (en) * | 2016-05-20 | 2016-08-03 | 太仓善融信息服务有限公司 | Production method of rigid foamed plastic swim ring |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000075546A1 (en) * | 1999-06-08 | 2000-12-14 | Crp Group Limited | Buoyant composite material |
| CN101289546A (en) * | 2007-04-20 | 2008-10-22 | 深圳市宝东盛塑胶包装制品有限公司 | Pearl cotton plates with high compressive strength and high thickness and preparation thereof |
| CN201670351U (en) * | 2010-04-30 | 2010-12-15 | 惠州全品科技工业有限公司 | Buoyancy bar |
| CN202572925U (en) * | 2012-04-24 | 2012-12-05 | 深圳市天之娇塑料制品有限公司 | Expandable polyethylene extruder with gear pump |
| CN102850619A (en) * | 2012-08-30 | 2013-01-02 | 苏州九鼎珍珠棉有限公司 | EPE foam for life jacket |
| CN102850620A (en) * | 2012-08-30 | 2013-01-02 | 苏州九鼎珍珠棉有限公司 | Environment-friendly single EPE sheet with high foaming capacity |
| RU2494913C2 (en) * | 2011-12-09 | 2013-10-10 | Юрий Фёдорович Тимофеев | Device for salvaging and high-speed swimming |
| CN104127992A (en) * | 2014-07-25 | 2014-11-05 | 平湖市圣柔得塑业有限公司 | Yoga rod and manufacturing method thereof |
-
2014
- 2014-11-25 CN CN201410686365.4A patent/CN104494797A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000075546A1 (en) * | 1999-06-08 | 2000-12-14 | Crp Group Limited | Buoyant composite material |
| CN101289546A (en) * | 2007-04-20 | 2008-10-22 | 深圳市宝东盛塑胶包装制品有限公司 | Pearl cotton plates with high compressive strength and high thickness and preparation thereof |
| CN201670351U (en) * | 2010-04-30 | 2010-12-15 | 惠州全品科技工业有限公司 | Buoyancy bar |
| RU2494913C2 (en) * | 2011-12-09 | 2013-10-10 | Юрий Фёдорович Тимофеев | Device for salvaging and high-speed swimming |
| CN202572925U (en) * | 2012-04-24 | 2012-12-05 | 深圳市天之娇塑料制品有限公司 | Expandable polyethylene extruder with gear pump |
| CN102850619A (en) * | 2012-08-30 | 2013-01-02 | 苏州九鼎珍珠棉有限公司 | EPE foam for life jacket |
| CN102850620A (en) * | 2012-08-30 | 2013-01-02 | 苏州九鼎珍珠棉有限公司 | Environment-friendly single EPE sheet with high foaming capacity |
| CN104127992A (en) * | 2014-07-25 | 2014-11-05 | 平湖市圣柔得塑业有限公司 | Yoga rod and manufacturing method thereof |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105820426A (en) * | 2016-05-20 | 2016-08-03 | 太仓善融信息服务有限公司 | Hard foamed plastic swimming ring |
| CN105820425A (en) * | 2016-05-20 | 2016-08-03 | 太仓善融信息服务有限公司 | Production method of rigid foamed plastic swim ring |
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