GB2454004A - A sound absorbing material and improvements in and relating to delivery trolleys - Google Patents
A sound absorbing material and improvements in and relating to delivery trolleys Download PDFInfo
- Publication number
- GB2454004A GB2454004A GB0721029A GB0721029A GB2454004A GB 2454004 A GB2454004 A GB 2454004A GB 0721029 A GB0721029 A GB 0721029A GB 0721029 A GB0721029 A GB 0721029A GB 2454004 A GB2454004 A GB 2454004A
- Authority
- GB
- United Kingdom
- Prior art keywords
- sound absorbing
- absorbing material
- delivery apparatus
- frame
- delivery
- 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.)
- Granted
Links
- 239000011358 absorbing material Substances 0.000 title claims abstract description 43
- 238000012384 transportation and delivery Methods 0.000 title claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 40
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 22
- 229920001179 medium density polyethylene Polymers 0.000 claims abstract description 17
- 239000004701 medium-density polyethylene Substances 0.000 claims abstract description 17
- 239000000654 additive Substances 0.000 claims abstract description 16
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 8
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- 238000000034 method Methods 0.000 claims abstract description 7
- 239000007822 coupling agent Substances 0.000 claims abstract description 3
- 238000004519 manufacturing process Methods 0.000 claims abstract description 3
- 238000005728 strengthening Methods 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 14
- 239000006057 Non-nutritive feed additive Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 7
- 235000004443 Ricinus communis Nutrition 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 229920005989 resin Polymers 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 239000011152 fibreglass Substances 0.000 description 4
- 239000010959 steel Substances 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 3
- 230000002745 absorbent Effects 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 240000000528 Ricinus communis Species 0.000 description 2
- 239000004615 ingredient Substances 0.000 description 2
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- PYVRVRFVLRNJLY-KTKRTIGZSA-N 1-oleoyl phosphatidylethanolamine Chemical compound CCCCCCCC\C=C/CCCCCCCC(=O)OCC(O)COP(O)(=O)OCCN PYVRVRFVLRNJLY-KTKRTIGZSA-N 0.000 description 1
- 235000018087 Spondias lutea Nutrition 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- -1 fibres Substances 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- VOZRXNHHFUQHIL-UHFFFAOYSA-N glycidyl methacrylate Chemical compound CC(=C)C(=O)OCC1CO1 VOZRXNHHFUQHIL-UHFFFAOYSA-N 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000178 monomer Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000001175 rotational moulding Methods 0.000 description 1
- 239000005060 rubber Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B1/00—Hand carts having only one axis carrying one or more transport wheels; Equipment therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B3/00—Hand carts having more than one axis carrying transport wheels; Steering devices therefor; Equipment therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F1/00—Springs
- F16F1/36—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers
- F16F1/3605—Springs made of rubber or other material having high internal friction, e.g. thermoplastic elastomers characterised by their material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B2301/00—Wheel arrangements; Steering; Stability; Wheel suspension
- B62B2301/20—Resilient wheel suspension using springs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
- B62B—HAND-PROPELLED VEHICLES, e.g. HAND CARTS OR PERAMBULATORS; SLEDGES
- B62B5/00—Accessories or details specially adapted for hand carts
- B62B5/0006—Bumpers; Safety devices
- B62B5/0009—Stops for moving parts, e.g. rubber elements to eliminate stop noise
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Transportation (AREA)
- General Engineering & Computer Science (AREA)
- Laminated Bodies (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Abstract
The invention provides a sound absorbing material in the form of a plate 10, the material comprising a base polymeric material such as medium density polyethylene (MDPE), and additives comprising a coupling agent such as a silane coupling agent and a strengthening additive such as calcium carbonate. The invention also provides a method for manufacturing the sound absorbing material and to a delivery apparatus 1 including the sound absorbing material 10 and positioned on the delivery apparatus so as to reduce noise levels which arise when the delivery apparatus is moved.
Description
A SOUND ABSORBING MATERIAL AND IMPROVEMENTS IN AND RELATING TO
DELIVERY TROLLEYS
The present invention relates the composition of a sound absorbent material for use on various products and the present invention also concerns improvements in and relating to delivery trolleys.
In the transport industry, steel roll cages or steel delivery trolleys are commonplace and are highly necessary for transporting goods from a delivery van or truck into the premises such as a supermarket, where the goods will be displayed and sold. These cages or trolleys have the associated disadvantage, in that they are extremely noisy. The impending introduction of EC Noise Directive 2002149/EC in 2008 will mean that deliveries can only be made between 7pm and 7am. Thus, there will be a requirement to make deliveries using such roll cages or delivery trolleys without the associated noise.
The present invention seeks to alleviate the disadvantages associated with the use of prior known delivery apparatus such as roll cages and delivery trolleys.
The present invention accordingly provides a sound absorbing material adapted to De located between component parts of a delivery apparatus. The sound absorbing material composition comprises a polymeric material together with additives.
* Ideally, the polymeric material comprises a resin having good impact absorbing properties *S..SS * and preferably, comprises medium density polyethylene (MDPE). *
S. *S** * * 20 The invention provides a sound absorbing material comprising a polymeric material such as medium density polyethylene (MDPE), and additives comprising a coupling agent such as silane coupling agent and a strengthening additive such as calcium carbonate.
Accordingly, the sound absorbing material preferably comprises medium density polyethylene (MDPE), Silane Coupling Agent (Si-O) and Calcium Carbonate (CaCO3).
The additives included may also comprise a processing aid. The processing aid is preferably supplied by AXEL Plastics Research Laboratories, Inc., Woodside, New York.
Preferably, a compatibiliser may be included in the composition, if required, to provide improved adhesion of the additives to the polymeric material. Examples of suitable compatibilisers include Maleic Anhydride (MHA) and monomers such as Glycidyl Methacrylate.
The range or combinations of materials that would provide effective sound absorbing properties are very wide but includes foams, fibres, rubbers, plastics or a combination thereof.
The sound absorbing material of the present invention has the advantage that all of the component parts and fittings on the delivery apparatus are isolated from each other (e.g. castors from the frame, frame from the body, etc), by introducing a layer of the sound absorbing material between each of the component parts.
Thus, the present invention provides a specialist material, which has the advantage that it reduces noise levels considerably. Blends of the materials are mixed and moulded using rotational moulding machinery.
The sound absorbing material of the invention has the advantage that the material is flexible with moderate to high impact strength in order to resist vibrations and to allow for smooth movement of the delivery apparatus The sound absorbing material of the invention also withstands cracking when subjected to impact. The material provides a 1.hrjrir off,-t in orr1r to dmnçn noise and orovide the noise absorption qualities :. required.
It was found through acoustic testing that there was a significant reduction in the decibel level emanating from a test trolley including the sound absorbing material of the present invention compared to that of a standard, prior art steel roll cage (delivery trolley). * SS* * S
In a second aspect, the present invention provides a method of manufacturing a sound * absorbing material, the method comprising the steps of: *5*
S
a) mixing a polymeric material together with additives in a mixing apparatus; b) placing the mixed material in a mould; C) rotationally moulding the material in a hot air oven at a temperature ranging from 200°C to 350°C for 3 mm/kg of material; d) cooling the moulded material to produce the sound absorbing material.
Preferably, at step (a), the mixing apparatus is rotated at 30 rpm for 10 mm/kg of material.
Ideally, at step (d), the cooling step is carried out by transferring the mould to a cooling chamber where the material was cooled for 3 mm/kg of material.
In a further aspect, the present invention also provides a delivery trolley comprising the sound absorbing material described above and manufactured using the method as described above.
The invention will now be described more particularly with reference to the accompanying drawings in which are shown by way of example only, one embodiment of the present invention and with reference to the Examples in which are described a number of exemplary embodiments/compositions for the sound absorbing material of the present invention.
In the drawings: Figure 1 is a side view of a delivery trolley (delivery apparatus) including the sound absorbing material of the present invention, with the undercarriage components of the delivery trolley shown disassembled; Figure 2 is a side view of the delivery trolley of Figure 1 with the components of the undercarriage shown assembled; and Figure 3 is a perspective view of the sound absorbing material manufactured in the form of a plate of material, in accordance with the present invention. S...
Referring initially to Figures 1 and 2, a delivery trolley is indicated generally by reference numeral 1, and includes an upstanding body 2 for holding goods to be transported from a S.....
* delivery truck or van to a premises such as a supermarket. The delivery trolley 1 also * 20 includes a frame 3 and four castors 4 (only two of which are shown in Figures 1 and 2). A layer of sound absorbing material 10 is placed between the frame 3 and the body 2 and a * further layer of sound absorbing material 11 is placed between each castor 4 and the *..
frame 3. The sound absorbing material 10 is manufactured using the composition given in Example 1, hereinbelow, which is the preferred composition. The sound absorbing material 10 is produced in the form of a plate as shown in Figure 2 and each plate includes a circular shaped aperture 11 located centrally on the plate through which aperture 11, a castor 4 can be inserted so that the castor 4 can be connected to the frame 3 and the body 2 with layers of sound absorbing material 10 sandwiching the frame 3 therebetween as shown in Figure 2.
Examples
Example 1:
The composition of the material in a preferred embodiment of the invention is as follows: % per kg of the total composition of the sound absorbing material Medium Density Polyethylene (MOPE) %wlw -MDPE with a melt flow in the range of 2-6 and with a density of between 0 926 -0.945 79.4% Chopped Fibreglass Strands -having a length ranging between 7mm and 15mm and having a width ranging between 5 microns -1.5mm and a depth of 35-100 microns 150% Silane Coupling Agent (Si.O) -flaying a aerisiLy wiuge.e.wil 3.3 -I fl 2% Internal Processing Aid Additive * * * *** -having a particle size ranging between 35 -100 microns 0.4% S... S* * 15 Calcium Carbonate (CaCO3) * -having a particle size ranging between 3 -25 microns 5 0% *.*S.* * .
S
The function of each of the ingredients is as follows: 1. MDPE provides good Impact Absorbing Properties, 2. Fibreglass -Prevents spreading (i.e. deformation by elongation) and provides strength 3. Silane Coupling Agent -Allows all materials to bond together 4. Processing Aid -Improves the processing and flow of the materials 5. Calcium Carbonate -Gives additional Strength and combined with the MDPE and silane coupling agent, provides an effective sound absorbent material and helps prevent the transfer of sound.
The processing aid additive is an of-the-shelf proprietary product composition available in the market place. The preferred processing aid additive is MOLD WIZ INT-40 DHT* powder supplied by AXEL Plastics Research Laboratories Inc., Woodside New York.
Samples of this preferred embodiment of the sound absorbing material were instaUed on a delivery trolley as shown in Figures 1 and 2 and the delivery trolley was acoustically tested by an independent company. As stated hereinabove, it was found that there was a significant reduction in the decibel level emanating from the trolley.
The process used to produce the sound absorbing material of the present invention was as follows: The ingredients were mixed in a tumble mixer, which rotates at 30 rpm for 10 mm/kg of material Material was then placed in a mould and rotationally moulded in a hot air oven at a temperature ranging from 2000 to 350° for 3mm/kg of material. The mould was then transferred to a cooling chamber where the material was cooled for 3 mm/kg of matenal.
Example 2:
Total composition 10.1 kg MDPE 7kg CaCO3 3kg INT-4OHT 0.1kg * *
* **s Example 3: ***. * * *..
Total composition 12.05kg MDPE 10kg CaCO3 0.5kg INT-4OHT 0.05kg S. .*S* * Chopped fiberglass strands 1kg
Example 4:
Total composition 11.6kg MDPE 10kg CaCO3 0.5kg INT-4OHT 0.05kg Chopped fiberglass 1 kg strands.
MOLD WIZ iNT-40 DHT us a Trade Mark Thus, the present invention has the advantage that it provides a sound absorbing material that can be used as a noise absorbent layer in delivery trolleys, steel roll cages and in many other similar products.
It will of course be understood that the invention is not limited to the specific details herein described, which are given by way of example only, and that various modifications and alterations are possible within the scope of the invention as defined in the appended claims. * 4_ * *** * *
S... e
S
55S5*5 * S *5**SS * S
S
S. .**S S *
I S..
S
Claims (14)
- CLAIMS: 1. A sound absorbing material adapted to be located between component parts of a delivery apparatus, the sound absorbing material composition comprising a polymeric material together with additives.
- 2. A sound absorbing material as claimed in claim 1, wherein the polymeric material comprises a resin having good impact absorbing properties.
- 3. A sound absorbing material as claimed in claim 1 wherein the polymeric material comprises medium density polyethylene (MDPE)
- 4. A sound absorbing material as claimed in any one of the preceding claims wherein the additives comprise a coupling agent such as silane coupling agent and a strengthening additive such as calcium carbonate.
- 5. A sound absorbing material as claimed in any one of the preceding claims wherein a processing aid additive is included.*
- 6. A method of manufacturing a sound absorbing material, the method comprising ****** * : the steps of: **.*S, * * * a) mixing a base polymeric material together with additives in a mixing apparatus; S. *SS * S b) placing the mixed material in a mould; c) rotationally moulding the material in a hot air oven at a temperature ranging from 200°C to 350°C for 3 mm/kg of material; d) cooling the moulded material to produce the sound absorbing material.
- 7. A method as claimed in claim 6 wherein at step (a) the mixing apparatus is rotated at 30 rpm for 10 mm/kg of material.
- 8. A method as claimed in claim 7 wherein at step (d), the cooling step is carried out by transferring the mould to a cooling chamber where the material was cooled for 3 mm/kg of material.
- 9. A delivery apparatus comprising an upstanding body, a frame and the delivery apparatus having wheels adapted to be connected to the frame and the body, wherein a sound absorbing material as claimed in claim 1 is included on the delivery apparatus such that the sound absorbing material is effective to reduce noise levels which arise when the apparatus is moved.
- 10. A delivery apparatus as claimed in claim 9 wherein the sound absorbing material is in the form of a plate.
- 11. A delivery apparatus as claimed in claim 9 wherein the sound absorbing material is provided between the castor wheels and the frame.
- 12 A delivery apparatus as claimed in claim 11 wherein the sound absorbing material is also provided between the frame and the body.
- 13. A sound absorbing material, substantially in accordance with any of the embodiments described herein in the Examples and with reference to and as shown in the * -nnn*,In#. rlrntn,Iflflc. * . * *** ****
- 14. A delivery apparatus substantially as herein described with reference to and as shown in the accompanying drawings. **.*..S * *S*SS.S* * SS S..S
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0721029A GB2454004B (en) | 2007-10-26 | 2007-10-26 | A sound absorbing material and improvements in and relating to delivery trolleys |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB0721029A GB2454004B (en) | 2007-10-26 | 2007-10-26 | A sound absorbing material and improvements in and relating to delivery trolleys |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB0721029D0 GB0721029D0 (en) | 2007-12-05 |
| GB2454004A true GB2454004A (en) | 2009-04-29 |
| GB2454004B GB2454004B (en) | 2009-11-11 |
Family
ID=38829989
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB0721029A Expired - Fee Related GB2454004B (en) | 2007-10-26 | 2007-10-26 | A sound absorbing material and improvements in and relating to delivery trolleys |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2454004B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2340978A2 (en) | 2009-12-23 | 2011-07-06 | Container Centralen A/S | A system for the mounting of shelves and the reduction of noise |
| CN111762573A (en) * | 2020-03-03 | 2020-10-13 | 山东炎黄工业设计有限公司 | Glass conveyer for building |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981001820A1 (en) * | 1979-12-27 | 1981-07-09 | Pelly Ab | Apparatus in a load carrier for the carriage and transport of goods |
| US5877246A (en) * | 1995-07-06 | 1999-03-02 | Societe Civile Neurone | Moulding material composition |
| JP2000236971A (en) * | 1999-02-22 | 2000-09-05 | Matsushita Electric Works Ltd | Catering wagon |
| EP1640391A1 (en) * | 2003-06-30 | 2006-03-29 | Kaneka Corporation | Curing composition |
| GB2421480A (en) * | 2004-12-24 | 2006-06-28 | Linpac Mouldings Ltd | Roll cage base plate |
-
2007
- 2007-10-26 GB GB0721029A patent/GB2454004B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1981001820A1 (en) * | 1979-12-27 | 1981-07-09 | Pelly Ab | Apparatus in a load carrier for the carriage and transport of goods |
| US5877246A (en) * | 1995-07-06 | 1999-03-02 | Societe Civile Neurone | Moulding material composition |
| JP2000236971A (en) * | 1999-02-22 | 2000-09-05 | Matsushita Electric Works Ltd | Catering wagon |
| EP1640391A1 (en) * | 2003-06-30 | 2006-03-29 | Kaneka Corporation | Curing composition |
| GB2421480A (en) * | 2004-12-24 | 2006-06-28 | Linpac Mouldings Ltd | Roll cage base plate |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2340978A2 (en) | 2009-12-23 | 2011-07-06 | Container Centralen A/S | A system for the mounting of shelves and the reduction of noise |
| EP2340978A3 (en) * | 2009-12-23 | 2013-06-19 | Container Centralen A/S | A system for the mounting of shelves and the reduction of noise |
| CN111762573A (en) * | 2020-03-03 | 2020-10-13 | 山东炎黄工业设计有限公司 | Glass conveyer for building |
| CN111762573B (en) * | 2020-03-03 | 2022-11-15 | 山东炎黄工业设计有限公司 | Glass conveyer for building |
Also Published As
| Publication number | Publication date |
|---|---|
| GB0721029D0 (en) | 2007-12-05 |
| GB2454004B (en) | 2009-11-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |
Effective date: 20131026 |