GB2266857A - Twin sheet formed plastic showertray - Google Patents

Twin sheet formed plastic showertray Download PDF

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Publication number
GB2266857A
GB2266857A GB9210050A GB9210050A GB2266857A GB 2266857 A GB2266857 A GB 2266857A GB 9210050 A GB9210050 A GB 9210050A GB 9210050 A GB9210050 A GB 9210050A GB 2266857 A GB2266857 A GB 2266857A
Authority
GB
United Kingdom
Prior art keywords
showertray
tsfp
thermoformed
twin sheet
twin
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
Application number
GB9210050A
Other versions
GB2266857B (en
GB9210050D0 (en
Inventor
Klaus Juerger Fikeis
Roger Folkard
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to GB9210050A priority Critical patent/GB2266857B/en
Publication of GB9210050D0 publication Critical patent/GB9210050D0/en
Publication of GB2266857A publication Critical patent/GB2266857A/en
Application granted granted Critical
Publication of GB2266857B publication Critical patent/GB2266857B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/266—Auxiliary operations after the thermoforming operation
    • B29C51/267—Two sheets being thermoformed in separate mould parts and joined together while still in the mould
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47K—SANITARY EQUIPMENT NOT OTHERWISE PROVIDED FOR; TOILET ACCESSORIES
    • A47K3/00—Baths; Douches; Appurtenances therefor
    • A47K3/28—Showers or bathing douches
    • A47K3/40—Pans or trays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/006—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor for making articles having hollow walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/022—Particular heating or welding methods not otherwise provided for
    • B29C65/028—Particular heating or welding methods not otherwise provided for making use of inherent heat, i.e. the heat for the joining comes from the moulding process of one of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/131—Single flanged joints, i.e. one of the parts to be joined being rigid and flanged in the joint area
    • B29C66/1312—Single flange to flange joints, the parts to be joined being rigid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/10—Forming by pressure difference, e.g. vacuum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2024/00—Articles with hollow walls
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7126—Containers; Packaging elements or accessories, Packages large, e.g. for bulk storage
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/769—Sanitary equipment
    • B29L2031/7696—Showers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Epidemiology (AREA)
  • General Health & Medical Sciences (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

A showertray of twin sheet construction, comprises a showertray 10 and a support liner 11 both of which wherein the processes of thermoforming of the two sheets and of welding of the two sheets together are carried out simultaneously as one operation. Features such as base board can be integrated into the construction. <IMAGE>

Description

TWIN SHEET FORMED PLASTIC SHOWERTRAY (TSFP SHOWERTRAY) This invention relates to showertray design, construction and manufacture.
Showertrays currently available in the market place are of 2 main manufacturing methods.
A) Showertrays thermoformed from single or multilayer thermoplastic sheet which is reinforced by application of a reactive polymer based foam system layer. This process (RIM) reaction injection moulding involves the tray form being enclosed to one side of a cavity between male/female moulds and the remaining cavity being filled by injected PU foam.
B) Showertrays thermoformed from single or multlayer thermoplastic sheet which is reinforced by fitting a separately moulded polystyrene support.
These 2 methods have the follow drawbacks which are causing the showertray manufacturers to search for alternatives.
A) Reinforcement by RIM is a subsequent operation which requires complex, expensive capital equipment and has a long process time and consequently is very expensive. Also scrap products cannot be reprocessed.
B) Reinforcement by polystyrene support moulding is a separate operation which requires complex, expensive capital equipment and has long process time and consequently is very expensive.
According to the present invention - The showertray consists of a twin sheet thermoforming construction, were the normal tray together with a support liner are thermoformed and welded together simultaneously, to comprise a one piece assembly.
- Features such as a base board can be integrated in the construction.
A specific embodiment of the invention will now be described by way of example with reference to the accompanying drawing in which: Figure 1 shows a plan view for the showertray and support liner assembly in trimmed condition ready for installation.
Figure 2 is a section view showing the configuration of the support liner and its relationship to the showertray.
Figure 3 is a detailed section view showing the relationship of tray and support liner forms and particularly the weld areas.
Referring to the drawing, two individual thermoplastic sheets have been simultaneously thermoformed and welded together by application of a combined twin sheet/pressure/vacuum thermoforming process to comprise one twin sheet showertray assembly.
The showertray 10 has been thermoformed from the upper sheet onto a male mould, and the support liner 11 has been thermoformed from the lower sheet into a female mould as the two moulds are closing.
At final closing, a pressure is applied achieving a weld at the designated areas 12,13,14, and 15.
A flat welded area for waste hole 15 is produced for fitment of same.
A non-slip pattern 16 when desired is formed in the tray base coinciding to the weld areas.
Cavity links 17 are formed in the weld areas to allow venting, so preventing air pressure variation when the tray base is heated and cooled in service.
Surplus sheet material 18 at the rim is trimmed.

Claims (6)

1. A TSFP showertray consists of a twin sheet thermoformed construction, were the showertray together with a support liner are thermoformed and welded together simultaneously.
2. A TSFP showertray as claimed in claim 1 wherein twin sheets consist of similar or non-similar thermoplastic sheet compositions.
3. A TSFP showertray as claimed in claims 1 and 2 wherein each tray and support liner assembly is produced in one operation in one machine cycle.
4. A TSFP showertray as claimed in claims 1,2 and 3 wherein the weld areas provide all necessary strength, requiring no further reinforcement materials or reinforcement operations.
5. A TSFP showertray as claimed in any previous claim wherein such features as base board can be integrated to the forms.
6. A TSFP showertray substantially as described herein with reference to figure 1-3 of the accompanying drawing.
GB9210050A 1992-05-09 1992-05-09 Twin sheet formed plastics showertray Expired - Fee Related GB2266857B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9210050A GB2266857B (en) 1992-05-09 1992-05-09 Twin sheet formed plastics showertray

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9210050A GB2266857B (en) 1992-05-09 1992-05-09 Twin sheet formed plastics showertray

Publications (3)

Publication Number Publication Date
GB9210050D0 GB9210050D0 (en) 1992-06-24
GB2266857A true GB2266857A (en) 1993-11-17
GB2266857B GB2266857B (en) 1995-12-13

Family

ID=10715270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9210050A Expired - Fee Related GB2266857B (en) 1992-05-09 1992-05-09 Twin sheet formed plastics showertray

Country Status (1)

Country Link
GB (1) GB2266857B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0618062A2 (en) * 1993-03-10 1994-10-05 Maschinenfabrik Georg Geiss Sanitary article, for example shower basin or bathtub, as well as proces and apparatus for its manufacture
EP0643939A2 (en) * 1993-09-21 1995-03-22 ALBATROS SYSTEM S.p.A. Shower-bath basin, in particular for a self-bearing shower-Bath booth
EP0824462A1 (en) * 1995-04-24 1998-02-25 Lyle H. Shuert Pallet with plastic legs
DE19746944A1 (en) * 1997-10-23 1999-07-29 Huber Maximilian Base for a bath or shower tray
EP0983738A1 (en) * 1998-08-28 2000-03-08 Beldore Limited Shower trays
EP1031404A2 (en) * 1999-02-26 2000-08-30 Findlay Industries Deutschland GmbH Filled hollow-body
EP1199019A1 (en) * 2000-10-20 2002-04-24 Liebscher Kunststofftechnik GmbH &amp; Co.KG Bottom reinforced bath tub
EP1064875A3 (en) * 1999-07-02 2003-06-04 Terence Luther Cundick Shower tray arrangement
GB2471687A (en) * 2009-07-08 2011-01-12 Polymer Recovery Ltd A shower floor structure with support layer

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001330A1 (en) * 1985-08-30 1987-03-12 Garwood Ltd. Improved tray for packaging

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE632196A (en) * 1962-05-11
US4294498A (en) * 1979-10-17 1981-10-13 Luit Richard D Van Wall cabinet and method of making
DE69128713T2 (en) * 1991-05-24 1998-04-23 Selmat Ind S P A Process for the production of hollow bodies from thermoplastic material

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1987001330A1 (en) * 1985-08-30 1987-03-12 Garwood Ltd. Improved tray for packaging

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0618062A3 (en) * 1993-03-10 1996-04-24 Geiss Georg Maschf Sanitary article, for example shower basin or bathtub, as well as proces and apparatus for its manufacture.
EP0618062A2 (en) * 1993-03-10 1994-10-05 Maschinenfabrik Georg Geiss Sanitary article, for example shower basin or bathtub, as well as proces and apparatus for its manufacture
EP0643939A2 (en) * 1993-09-21 1995-03-22 ALBATROS SYSTEM S.p.A. Shower-bath basin, in particular for a self-bearing shower-Bath booth
EP0643939A3 (en) * 1993-09-21 1995-08-30 Albatros System Spa Shower-bath basin, in particular for a self-bearing shower-Bath booth.
EP0824462A4 (en) * 1995-04-24 2000-05-03 Lyle H Shuert Pallet with plastic legs
EP0824462A1 (en) * 1995-04-24 1998-02-25 Lyle H. Shuert Pallet with plastic legs
DE19746944A1 (en) * 1997-10-23 1999-07-29 Huber Maximilian Base for a bath or shower tray
EP0983738A1 (en) * 1998-08-28 2000-03-08 Beldore Limited Shower trays
EP1031404A2 (en) * 1999-02-26 2000-08-30 Findlay Industries Deutschland GmbH Filled hollow-body
EP1031404A3 (en) * 1999-02-26 2001-01-31 Findlay Industries Deutschland GmbH Filled hollow-body
EP1064875A3 (en) * 1999-07-02 2003-06-04 Terence Luther Cundick Shower tray arrangement
EP1199019A1 (en) * 2000-10-20 2002-04-24 Liebscher Kunststofftechnik GmbH &amp; Co.KG Bottom reinforced bath tub
WO2002032279A1 (en) * 2000-10-20 2002-04-25 Liebscher Kunststofftechnik Gmbh & Co.Kg Bathtub having a reinforced bottom
GB2471687A (en) * 2009-07-08 2011-01-12 Polymer Recovery Ltd A shower floor structure with support layer
GB2471779A (en) * 2009-07-08 2011-01-12 Polymer Recovery Ltd Shower floor structure with support layer

Also Published As

Publication number Publication date
GB2266857B (en) 1995-12-13
GB9210050D0 (en) 1992-06-24

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990509