CA1292852C - Temperature adjusting device for plastics material extruding, injecting and drawing machines and cylinders of plastics material processing machines in general - Google Patents
Temperature adjusting device for plastics material extruding, injecting and drawing machines and cylinders of plastics material processing machines in generalInfo
- Publication number
- CA1292852C CA1292852C CA000536138A CA536138A CA1292852C CA 1292852 C CA1292852 C CA 1292852C CA 000536138 A CA000536138 A CA 000536138A CA 536138 A CA536138 A CA 536138A CA 1292852 C CA1292852 C CA 1292852C
- Authority
- CA
- Canada
- Prior art keywords
- plastics material
- machines
- metal sheet
- outer casing
- cylinders
- 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.)
- Expired - Lifetime
Links
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a temperature adjusting device, particularly designed for processing cylinders of extruding, injecting, drawing and the like machines for processing plastics materials in general, which comprises a flexible body, of sleeve shape, which may be arranged on the outside of the plastics material processing machine; the body is housed in an outer duct, for conveying and discharging air in a substantially transversal direction with respect to the body itself.
Description
l~Z~3~iZ
The present invention relates to a temperature adjusting device, particularly designed for extruding, injecting and drawing machine cylinders, for processing plastics material in general.
As is known, for processing plastics materials and elastomeric materials in general, there are used machines which are provided with an plasticizing cylinder including heating systems which are controlled by automatic temperature adjusting means, provided for holding at a set value the temperature, in order to process in the most suitable way the plastics materials.
In these machines, as the temperature rlses above the set thermal levels, it is necessary to stop the operation of the machine, with a consequent yield reduction and increase of the production cost.
The presen-tly used devices for stabilizing the operation temperatures in these machines are not generally able of solving the above mentioned problem slnce they are rather complex and of difflcult assembling.
Moreover, the known devlces are not able oE provlding a constant operation and require frequently maintenance operatlons.
According to the present invention there is provided a temperature ad~usting device, partlcularly designed for cylinders of plastlcs material extruding machines, in~ecting machines, drawing machines for processing plastics material in general, comprising a flexible body adapted to be mounted, as a sleeve member, on thè outslde of the machine cylinder, a thermally insulated outer casing for housing said flexible body including a plurality of ceramics material strip members of substantially semicircular shape arranged in an ad~oining relationship, said strip members being provided with throughgoing holes for housing heating electric resistances, said holes defining forced cooling . ~
~'~9Z~352 air passage paths, said thermally insulated outer casing having a fixed portion and a removable portion, said fixed portion consisting of a base metal sheet, made rigid with said machine cylinder by means of flanges and supporting small blocks, said base metal sheet being provided with intermediate slots for allowing for said forced cooling air to pass therethrough, at the transversal end portions of said thermally insulated outer casing there being provided an insulating material layer which is encompassed on a side by a corrugated metal sheet adapted for operating as a reflecting mirror element and, at the top, by a flat metal sheet providing a resting abutment, and two longitudinal semicylindrical corrugated metal sheets, providing reflecting mirror like elements encompassing said strip members and provided with continuous gaps for the passage of said forced cooling air, to sald corrugated metal sheets an insulating material layer being applied which is enclosed and protected by a holding outer metal sheet defining, with the outer walls of said outer casing, a gap communicating to the outside through aerating slots.
The invention overcomes the above mentioned drawbacks, by providlng a temperature ad~usting device, specifically designed for plastics material extrudirlg cylinders, in~ection machines, drawlng machines and plastics material processing machines in general, which affords the possibllity of holding the operation temperature constant, under all oE the operation conditlons.
According to the present invention there is provided a temperature ad~usting device, particularly designed for cylinders of plastics material extruding machines, in~ecting machines, drawing machines for processing plastics material in general, comprising a flexible body adapted to be mounted, as a sleeve member, on the outside of the machine cylinder, a thermally insulated outer casing for housing said flexible body including a plurality of ceramics material strip members of substantially semicircular shape arranged in an ad~oining relationship, said strip members being provided with throughgoing holes for housing heating electric resistances, said holes defining forced cooling air passage paths, said thermally insulated outer casing having a fixed portion and a removable portion, said fixed portion consisting of a base metal sheet, made rigid with said machine cylinder by means of flanges and supporting small blocks, said base metal sheet being provided with intermediate slots for allowing for said forced cooling air to pass therethrough, at the transversal end portions of said thermally insulated outer casing there being provided an insulating material layer which is encompassed on a side by a corrugated metal sheet adapted for operating as a reflecting mirror element and, at the top, by a flat metal sheet providing a resting abutment, and two longitudinal semicylindrical corrugated metal sheets, providing reflecting mirror like elements encompassing said strip members and provided with continuous gaps for the passage of said forced cooling air, to said corrugated metal sheets an insulating material layer being applied which is enclosed and protected by a holding outer metal sheet defining, with the outer walls of said outer casing, a gap communica-ting to the outside through aerating slots.
The invention can also provlde such a temperature ad~usting device which may be quickly and simply installed on any types of plastics material proce3sing cylinders, whlle affording the possibility of qulckly controlling -the machine with reduced maintenance re~uirements.
The invention can provide a temperature ad~usting device of very simplified structure, which is very reliable and safe in operation.
The invention can also provide such a temperature adjusting device, particularly designed for cylinders of plastics material extruding machines, in~ecting machines, drawing machines and machines for processing plastics material in general, which may be easily made starting from easily commercially available elements and materials and which, moreover, is competitive from a mere economic standpoint.
Further characteristics and advantages of the invention will become more apparent thereinafter from the following detailed description of a preferred though not exclusive embodiment of a temperature ad~ustlng device, particularly designed for plastics material processing cylinders, which is illustrated by way of an indicative but not limitative example in the accompanying drawings, where:
Figure 1 ls a cross-sectional view illustrating the -temperature ad~usting devlce according to the invention;
Figure 2 illustrates a longitudlnal cross-sectlonal view of the temperature ad~ustlng device applled to an extrudlng machlne cylinder;
Flgure 3 illustrates a heating electric resistance which forms a part of the flexible body, - 4a -'- i~Z~S~
with air cooling;
~ igs. 4 and 5 illu~trate -two dif:~erent embodiments o-~ the heat exchan~er finned assemblie~;
Figures.6 and 7 illustrates -two difL`erent embodimonts of 6trip members, devoid of fin~;
and Figure ~ ie a side vlew illus-tratin~r n strip mcmber dev-~id of in~.
D~SCl~IPTIOI~ OF ~ . PR~FEI~ED ~ODI~'~Nl'S
Witll reference to tho drawin~s, t;ho tempexa-ture adjustin~ device, particultLrly dc~igned f()r cylinder~t of pla~tic3 n~terial ~)roce3sing machine3 in general, such a~ oxtruding, injectin~ aIl(1 drl.lwing tnaclline~t, accordin~ to t~le invcntlon, coln~)risc~ t~
flexible body whicll ~L~b~.ttantlal.ly consi3t-J o~ eat-in~ at3emblie~ l nnd heut exchanger ~tt~clIlbl:i.e~ ~, wh.ich, t.~dvu~t~L~evus~.y, ~re mutually interctllated and cvupled alon~ an axlal diroction.
Moreover, a not ~inncd ~e~-ting as~embly 3 arrun~ed at one ~nd iB provided.
'l`he as~emblie~ l, 2 and 3 are axi~Llly ap-})lied on the outside o~ a pla~tics material pla3ti-ci~ing cylinder, indicated at 4.
More ~pecificallyJ the~e assemblies are made ~tarting from strip members, which are clearly illu~-trated in Figures 4 to ~, and wllich ~Ly be ad-joined one another according to the most suitable ~Z9Z~352 arrangements.
The strip members illustrated in Figures 4 and 5 are provided with outer fins and hollows 6 at the end portions thereof contacting the plastics material processing cylinder 4.
S The strip members indicated at 5' have a like shape, with the difference that they are not provided with fins.
All of the strip members are formed with throughgoing holes 7 for introducing thereinto electric heating resistances, indicated at 8, and are so constructed as to allow for cooling air to pass therethrough, as it will be illustrated in a more detailed way thereinafter.
As is clearly shown in the end elevation view of Figure 8, the strip members are provided, on a side with a recess 5a, with substantially circular shape, and, on the other side, with a projection 5b, also of substantially circular shape, so as to provide a coupling able of causing the adjoining strip members to assume a nearly circular shape.
The not finned heating assembly 3, which is specifically shown in Figure 3, consists of two assemblies, arranged to ~0 define a semicylindrical shape, which are separated by a base strip member 9 and a bottom strip member 10, having respective mating shapes.
On the outside the strip members 9 and 10 are coated with a thermally insulating material layer 11 which is restrained tightly to the two semicylindrical assemblies by tight band 12, which is locked by a tie-rod 13 and which supports insulating small blocks 14 at which end the power supply wires 15 and ground wires 16.
"i~"
_ . .
lZ~Z~S2 The heating assemblies 1, heat exchanger assemblies 2 and not finned heating assemblies 3 are protected by a thermally insulated carter, including a fixed portion 17 and a removable portion 18.
The fixed portion consists of a base metal sheet, which is made rigid with the extruding cylinder 4 by means of flanges 19 and supporting small blocks 20.
The base metal sheet is provided with intermediate slots 21, therethrough the forced cooling air is caused to pass, and is provided, at the transversal end portions thereof, upwardly curved, with a thermally insulating material layer 22 which is coated, on a side, by a corrugated metal sheet 23 adapted for operating as a reflecting mirror element and, on the top, by a flat metal sheet 24 providing a resting abutment.
An outer casing, made of stainless steel, is further provided for defining a forced ventilation path, which ventilation path is controlled by an electric motor operating a double fan so as to generate an air flow which flows transversely relative to the axial extension of the flexible body. The fan is provided with a discharging outlet which is diametrically arranged relative to the inlet region.
The removable portion 18 of the carter or casing is advantageously made of a shaped metal sheet having vertically extending walls which are provided with aerating slots 25, and a top horizontally extending wall in which there is formed an air discharging stack 26 for discharging the air conveyed through the outer envelope or casing.
The vertical walls are provided with closure hook members 27 engaging with corresponding hook members 28 provided on the fixed portion of the carter or casing and which are lZ92852 intercoupled, at thelr end portions, by shaped perpendicular walls for closing the carter at the front and rear thereof.
The carter further supports, in its inside and in the longitudinal direction, two corrugated metal sheets 30, which have a substantially semicylindrical arrangement and operate as reflecting mirror elements, and encompass the heating and heat exchanger structure, so as to form, thereabout, continuous gaps for the passage of the cooling air which contributes to the temperature adjusting of the system.
To the mentioned corrugated metal sheets there is coupled a thermally insulating material layer 32 which is enclosed and protected by an outer holding metal sheet 33, which defines, with the carter outer walls, a further gap 34 communicating to the outside through the aerating slots 25.
Thus, a portion of the cooling airflow, by directly entering through the slots 21, contacts the plastics material processing cylinder and passes through the offset hollows 6 of the strip members 5 and 5' so as to adjust to the set value the temperature of said cylinder and prevent the temperature from undesirable increasing.
A portion of the airflow flows through the gaps thereby cooling the outer portion, possibly finned, of the strip members 5 and 5'.
Accordingly, the carter or casing is constantly held at a comparatively low temperature, thereby it does not represent a danger source for the operators.
~y acting on the hook members 27, the removable portion 18 of the casing may be easily removed, thereby affording the possibility of visually controlling the heat exchanger and heating assemblies.
_ .
lZ9Z852 In order to more accurately control the temperature, inside the carter or casing there is provided at least a thermocouple 35 for controlling the power supplying of the electric resistance 8.
From the above disclosure it should be apparent that the invention fully achieves the intended objects.
While the invention has been disclosed with reference to preferred embodiments thereof, it should be apparent that it is susceptible to several modifications and variations all of which come within the scope of the appended claims.
, .~
The present invention relates to a temperature adjusting device, particularly designed for extruding, injecting and drawing machine cylinders, for processing plastics material in general.
As is known, for processing plastics materials and elastomeric materials in general, there are used machines which are provided with an plasticizing cylinder including heating systems which are controlled by automatic temperature adjusting means, provided for holding at a set value the temperature, in order to process in the most suitable way the plastics materials.
In these machines, as the temperature rlses above the set thermal levels, it is necessary to stop the operation of the machine, with a consequent yield reduction and increase of the production cost.
The presen-tly used devices for stabilizing the operation temperatures in these machines are not generally able of solving the above mentioned problem slnce they are rather complex and of difflcult assembling.
Moreover, the known devlces are not able oE provlding a constant operation and require frequently maintenance operatlons.
According to the present invention there is provided a temperature ad~usting device, partlcularly designed for cylinders of plastlcs material extruding machines, in~ecting machines, drawing machines for processing plastics material in general, comprising a flexible body adapted to be mounted, as a sleeve member, on thè outslde of the machine cylinder, a thermally insulated outer casing for housing said flexible body including a plurality of ceramics material strip members of substantially semicircular shape arranged in an ad~oining relationship, said strip members being provided with throughgoing holes for housing heating electric resistances, said holes defining forced cooling . ~
~'~9Z~352 air passage paths, said thermally insulated outer casing having a fixed portion and a removable portion, said fixed portion consisting of a base metal sheet, made rigid with said machine cylinder by means of flanges and supporting small blocks, said base metal sheet being provided with intermediate slots for allowing for said forced cooling air to pass therethrough, at the transversal end portions of said thermally insulated outer casing there being provided an insulating material layer which is encompassed on a side by a corrugated metal sheet adapted for operating as a reflecting mirror element and, at the top, by a flat metal sheet providing a resting abutment, and two longitudinal semicylindrical corrugated metal sheets, providing reflecting mirror like elements encompassing said strip members and provided with continuous gaps for the passage of said forced cooling air, to sald corrugated metal sheets an insulating material layer being applied which is enclosed and protected by a holding outer metal sheet defining, with the outer walls of said outer casing, a gap communicating to the outside through aerating slots.
The invention overcomes the above mentioned drawbacks, by providlng a temperature ad~usting device, specifically designed for plastics material extrudirlg cylinders, in~ection machines, drawlng machines and plastics material processing machines in general, which affords the possibllity of holding the operation temperature constant, under all oE the operation conditlons.
According to the present invention there is provided a temperature ad~usting device, particularly designed for cylinders of plastics material extruding machines, in~ecting machines, drawing machines for processing plastics material in general, comprising a flexible body adapted to be mounted, as a sleeve member, on the outside of the machine cylinder, a thermally insulated outer casing for housing said flexible body including a plurality of ceramics material strip members of substantially semicircular shape arranged in an ad~oining relationship, said strip members being provided with throughgoing holes for housing heating electric resistances, said holes defining forced cooling air passage paths, said thermally insulated outer casing having a fixed portion and a removable portion, said fixed portion consisting of a base metal sheet, made rigid with said machine cylinder by means of flanges and supporting small blocks, said base metal sheet being provided with intermediate slots for allowing for said forced cooling air to pass therethrough, at the transversal end portions of said thermally insulated outer casing there being provided an insulating material layer which is encompassed on a side by a corrugated metal sheet adapted for operating as a reflecting mirror element and, at the top, by a flat metal sheet providing a resting abutment, and two longitudinal semicylindrical corrugated metal sheets, providing reflecting mirror like elements encompassing said strip members and provided with continuous gaps for the passage of said forced cooling air, to said corrugated metal sheets an insulating material layer being applied which is enclosed and protected by a holding outer metal sheet defining, with the outer walls of said outer casing, a gap communica-ting to the outside through aerating slots.
The invention can also provlde such a temperature ad~usting device which may be quickly and simply installed on any types of plastics material proce3sing cylinders, whlle affording the possibility of qulckly controlling -the machine with reduced maintenance re~uirements.
The invention can provide a temperature ad~usting device of very simplified structure, which is very reliable and safe in operation.
The invention can also provide such a temperature adjusting device, particularly designed for cylinders of plastics material extruding machines, in~ecting machines, drawing machines and machines for processing plastics material in general, which may be easily made starting from easily commercially available elements and materials and which, moreover, is competitive from a mere economic standpoint.
Further characteristics and advantages of the invention will become more apparent thereinafter from the following detailed description of a preferred though not exclusive embodiment of a temperature ad~ustlng device, particularly designed for plastics material processing cylinders, which is illustrated by way of an indicative but not limitative example in the accompanying drawings, where:
Figure 1 ls a cross-sectional view illustrating the -temperature ad~usting devlce according to the invention;
Figure 2 illustrates a longitudlnal cross-sectlonal view of the temperature ad~ustlng device applled to an extrudlng machlne cylinder;
Flgure 3 illustrates a heating electric resistance which forms a part of the flexible body, - 4a -'- i~Z~S~
with air cooling;
~ igs. 4 and 5 illu~trate -two dif:~erent embodiments o-~ the heat exchan~er finned assemblie~;
Figures.6 and 7 illustrates -two difL`erent embodimonts of 6trip members, devoid of fin~;
and Figure ~ ie a side vlew illus-tratin~r n strip mcmber dev-~id of in~.
D~SCl~IPTIOI~ OF ~ . PR~FEI~ED ~ODI~'~Nl'S
Witll reference to tho drawin~s, t;ho tempexa-ture adjustin~ device, particultLrly dc~igned f()r cylinder~t of pla~tic3 n~terial ~)roce3sing machine3 in general, such a~ oxtruding, injectin~ aIl(1 drl.lwing tnaclline~t, accordin~ to t~le invcntlon, coln~)risc~ t~
flexible body whicll ~L~b~.ttantlal.ly consi3t-J o~ eat-in~ at3emblie~ l nnd heut exchanger ~tt~clIlbl:i.e~ ~, wh.ich, t.~dvu~t~L~evus~.y, ~re mutually interctllated and cvupled alon~ an axlal diroction.
Moreover, a not ~inncd ~e~-ting as~embly 3 arrun~ed at one ~nd iB provided.
'l`he as~emblie~ l, 2 and 3 are axi~Llly ap-})lied on the outside o~ a pla~tics material pla3ti-ci~ing cylinder, indicated at 4.
More ~pecificallyJ the~e assemblies are made ~tarting from strip members, which are clearly illu~-trated in Figures 4 to ~, and wllich ~Ly be ad-joined one another according to the most suitable ~Z9Z~352 arrangements.
The strip members illustrated in Figures 4 and 5 are provided with outer fins and hollows 6 at the end portions thereof contacting the plastics material processing cylinder 4.
S The strip members indicated at 5' have a like shape, with the difference that they are not provided with fins.
All of the strip members are formed with throughgoing holes 7 for introducing thereinto electric heating resistances, indicated at 8, and are so constructed as to allow for cooling air to pass therethrough, as it will be illustrated in a more detailed way thereinafter.
As is clearly shown in the end elevation view of Figure 8, the strip members are provided, on a side with a recess 5a, with substantially circular shape, and, on the other side, with a projection 5b, also of substantially circular shape, so as to provide a coupling able of causing the adjoining strip members to assume a nearly circular shape.
The not finned heating assembly 3, which is specifically shown in Figure 3, consists of two assemblies, arranged to ~0 define a semicylindrical shape, which are separated by a base strip member 9 and a bottom strip member 10, having respective mating shapes.
On the outside the strip members 9 and 10 are coated with a thermally insulating material layer 11 which is restrained tightly to the two semicylindrical assemblies by tight band 12, which is locked by a tie-rod 13 and which supports insulating small blocks 14 at which end the power supply wires 15 and ground wires 16.
"i~"
_ . .
lZ~Z~S2 The heating assemblies 1, heat exchanger assemblies 2 and not finned heating assemblies 3 are protected by a thermally insulated carter, including a fixed portion 17 and a removable portion 18.
The fixed portion consists of a base metal sheet, which is made rigid with the extruding cylinder 4 by means of flanges 19 and supporting small blocks 20.
The base metal sheet is provided with intermediate slots 21, therethrough the forced cooling air is caused to pass, and is provided, at the transversal end portions thereof, upwardly curved, with a thermally insulating material layer 22 which is coated, on a side, by a corrugated metal sheet 23 adapted for operating as a reflecting mirror element and, on the top, by a flat metal sheet 24 providing a resting abutment.
An outer casing, made of stainless steel, is further provided for defining a forced ventilation path, which ventilation path is controlled by an electric motor operating a double fan so as to generate an air flow which flows transversely relative to the axial extension of the flexible body. The fan is provided with a discharging outlet which is diametrically arranged relative to the inlet region.
The removable portion 18 of the carter or casing is advantageously made of a shaped metal sheet having vertically extending walls which are provided with aerating slots 25, and a top horizontally extending wall in which there is formed an air discharging stack 26 for discharging the air conveyed through the outer envelope or casing.
The vertical walls are provided with closure hook members 27 engaging with corresponding hook members 28 provided on the fixed portion of the carter or casing and which are lZ92852 intercoupled, at thelr end portions, by shaped perpendicular walls for closing the carter at the front and rear thereof.
The carter further supports, in its inside and in the longitudinal direction, two corrugated metal sheets 30, which have a substantially semicylindrical arrangement and operate as reflecting mirror elements, and encompass the heating and heat exchanger structure, so as to form, thereabout, continuous gaps for the passage of the cooling air which contributes to the temperature adjusting of the system.
To the mentioned corrugated metal sheets there is coupled a thermally insulating material layer 32 which is enclosed and protected by an outer holding metal sheet 33, which defines, with the carter outer walls, a further gap 34 communicating to the outside through the aerating slots 25.
Thus, a portion of the cooling airflow, by directly entering through the slots 21, contacts the plastics material processing cylinder and passes through the offset hollows 6 of the strip members 5 and 5' so as to adjust to the set value the temperature of said cylinder and prevent the temperature from undesirable increasing.
A portion of the airflow flows through the gaps thereby cooling the outer portion, possibly finned, of the strip members 5 and 5'.
Accordingly, the carter or casing is constantly held at a comparatively low temperature, thereby it does not represent a danger source for the operators.
~y acting on the hook members 27, the removable portion 18 of the casing may be easily removed, thereby affording the possibility of visually controlling the heat exchanger and heating assemblies.
_ .
lZ9Z852 In order to more accurately control the temperature, inside the carter or casing there is provided at least a thermocouple 35 for controlling the power supplying of the electric resistance 8.
From the above disclosure it should be apparent that the invention fully achieves the intended objects.
While the invention has been disclosed with reference to preferred embodiments thereof, it should be apparent that it is susceptible to several modifications and variations all of which come within the scope of the appended claims.
, .~
Claims
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:
1. A temperature adjusting device, particularly designed for cylinders of plastics material extruding machines, injecting machines, drawing machines for processing plastics material in general, comprising a flexible body adapted to be mounted, as a sleeve member, on the outside of the machine cylinder, a thermally insulated outer casing for housing said flexible body including a plurality of ceramics material strip members of substantially semicircular shape arranged in an adjoining relationship, said strip members being provided with throughgoing holes for housing heating electric resistances, said holes defining forced cooling air passage paths, said thermally insulated outer casing having a fixed portion and a removable portion, said fixed portion consisting of a base metal sheet, made rigid with said machine cylinder by means of flanges and supporting small blocks, said base metal sheet being provided with intermediate slots for allowing for said forced cooling air to pass therethrough, at the transversal end portions of said thermally insulated outer casing there being provided an insulating material layer which is encompassed on a side by a corrugated metal sheet adapted for operating as a reflecting mirror element and, at the top, by a flat metal sheet providing a resting abutment, and two longitudinal semicylindrical corrugated metal sheets, providing reflecting mirror like elements encompassing said strip members and provided with continuous gaps for the passage of said forced cooling air, to said corrugated metal sheets an insulating material layer being applied which is enclosed and protected by a holding outer metal sheet defining, with the outer walls of said outer casing, a gap communicating to the outside through aerating slots.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000536138A CA1292852C (en) | 1987-05-01 | 1987-05-01 | Temperature adjusting device for plastics material extruding, injecting and drawing machines and cylinders of plastics material processing machines in general |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000536138A CA1292852C (en) | 1987-05-01 | 1987-05-01 | Temperature adjusting device for plastics material extruding, injecting and drawing machines and cylinders of plastics material processing machines in general |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1292852C true CA1292852C (en) | 1991-12-10 |
Family
ID=4135560
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000536138A Expired - Lifetime CA1292852C (en) | 1987-05-01 | 1987-05-01 | Temperature adjusting device for plastics material extruding, injecting and drawing machines and cylinders of plastics material processing machines in general |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1292852C (en) |
-
1987
- 1987-05-01 CA CA000536138A patent/CA1292852C/en not_active Expired - Lifetime
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4758146A (en) | Temperature adjusting device for plastics material extruding, injecting and drawing machines and cylinders of plastics material processing machines in general | |
| AU705502B2 (en) | Directly cooled, side fired forehearth | |
| EP0152844B1 (en) | Die for hot die face cutting thermoplastic polymers | |
| US4964795A (en) | Manifold assembly for plastic injection molding | |
| US4558210A (en) | Electric cast-metal heater | |
| US3978910A (en) | Mold plate cooling system | |
| KR900007330B1 (en) | Heat displacing type dies | |
| EP0242340B1 (en) | Modular element heat exchanger, particularly for extrusion cylinders, injection molding machines, drawing machines and the like plastics processing machines | |
| CA1292852C (en) | Temperature adjusting device for plastics material extruding, injecting and drawing machines and cylinders of plastics material processing machines in general | |
| KR20020075290A (en) | Heatable throttle device for internal combustion engine | |
| US5200205A (en) | Extruder barrel temperature regulation apparatus | |
| US5178351A (en) | Insulating support base for a cylindrical electric hot water tank | |
| JP4567457B2 (en) | Vacuum cast ceramic fiber insulation band with heating and cooling elements | |
| ES2175541T3 (en) | HEATING PANEL. | |
| US2574907A (en) | Extrusion apparatus | |
| US4028051A (en) | Curing oven for mineral wool | |
| US3067316A (en) | Electrical duct heater | |
| US4204340A (en) | Installation for treating a product in a gaseous medium | |
| US2823026A (en) | Heater assembly for salvaging heat lost with products of combustion | |
| US4634361A (en) | Heat transfer means to be installed around the barrel of an extruder or injection molding machine | |
| US4729735A (en) | Vertical air flow ingot pusher furnace | |
| US4676743A (en) | Vertical air flow ingot pusher furnace | |
| US5431755A (en) | Method of and arrangement for thermal treatment of continuously moving metal bands | |
| EP0109368A2 (en) | Electric resistance heating assembly for plastics material extruders | |
| SU1362695A1 (en) | Thermal pneumatic conveyer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |