CYLINDERS SREW-TIP-SETS NOZZLES SPECIAL DESIGNS...The claws of this screw-tip-set guaran-tee a...

W e m a n u f a c t u r e . Y o u p l a s t i c i z e .

SCREWS CYLINDERS

SREW-TIP-SETS

NOZZLES

SPECIAL DESIGNS

. . .

Certified andmade in Germany.

Groche specialists. Qualified and committed.

Groche products. Accuracy and precision.

PRODUCTS. PROGRAMME.

02 | 03 | INTRO & CONTENTS

Screws Seite

Cylinders

Screw-Tip-Sets

Active Srew-Tip-Set

Nozzles & End Caps

Special Nozzles

Spring activated Shut-Off Nozzles

Hydraulic/Pneumatic Shut-Off Nozzles

Nozzles with Coil Heater

GSM mixing Nozzles

Dynamic mixing Nozzles

PVD Coating

HVOF Refinement

Screw and Cylinder Regeneration

Choice of Steel

Groche international Sales Network

8 - 13

14 - 18

20 - 27

26 - 27

28 - 32

34 - 35

36 - 37

38 - 39

40 - 41

43

44 - 45

46 - 47

48 - 49

50 - 51

52 - 53

The story of our family business begins in the year 1970 as a subcontractor of turned parts for manufacturers of injection moulding machines. Since then Groche Technik has continuously developed in line with future de-mands. Today we make high-end steel products for plastics machinery. With technical know-how and precise expertise, our highly experienced CNC processing centres create spe-cialised plasticizing units. Groche offers the best solutions for discerning customers in Germany and Europe. Try our certified value of work.

Groche Technik has been producing high-end plasticising units since 1970.

WE MANIFACTURE. YOU PLASTICISE.

WE PRODUCE PLASTICIZING UNITS. SUITABLE FOR YOUR PRODUCT.

04 | 05 | INTRO

Die Groche Bearbeitungszentren und Maschinen sind stets auf dem neuesten Stand wie unser motiviertes Fachperso-nal. Wir erfüllen die hohen Qualitätsan-forderungen unserer Kunden.

Das Plasma-Pulver-Auftragsschweissen als Verschleißschutz bei Neuanfertigungen und zur Regeneration - unsere Produkte zeichnen sich durch überdurchschnittli-che Beanspruchbarkeit und Lebensdauer aus.

Bei der Konstruktion unserer Erzeugnisse setzen wir auf CAD/CAM Anwendungen für höchste Präzision und ein gleichblei-bendes Qualitätslevel. Unser Anspruch ist Wertarbeit, die beständig überprüft wird.

Groche liefert Ersatzteile für alle euro-päischen Hersteller von Kunstoff-Spritz-gussmaschinen. Nutzen Sie unsere umfangreiche Lagerhaltung für gängige europäische Plastifiziereinheiten.

Groche processing centres and ma-chines always work to the latest tech-nological state-of-the art, just like our motivated specialist personnel. We fulfil the high demands for quality set by our customers.

Plasma-powder welding as protection against wear and tear for new products and for regeneration – our products are distinguished by their above average durability and service life.

We use CAD/CAM technology when constructing our products to ensure the highest precision and consistent levels of quality. We demand workmanship, which is constantly monitored.

Groche supplies spare parts fitting for all European manufacturers of plastic injection moulding machines. Use our comprehensive stock of all conventio-nal plasticizing units.

PLASTICISING UNITS ARE UNDER PARTICULAR STRESS.

We develop, construct and produce the central elements of plasticizing units according to your specifications.

GROCHE PRODUCES HIGH-END COMPONENTS.

C o n t r o l c a b i n e t sM a c h i n e t a b l e

M o d e l : P l a s t i c i n j e c t i o n m o u l d i n g m a c h i n e

06 | 07 | PLASTICIS ING UNITS

P l a s t i c i s i n g u n i tC l o s i n g u n i t

C o n t r o l e l e m e n t

Screws

Cylinders

Nozzles

Screw-Tip-Sets

Special Designs

SCREWS BY GROCHE. PRECISION FOR YOUR PLASTICS.

We manufacture screws as individually as plastics. They are performance opti-mised, highly resistant to wear and tear and corrosion-proof. Our screw produc-tion can fulfil your requirements from 12 mm to 140 mm in diameter up to a length of 5000 mm. The manufacture of screws for plastic injection moulding machines sets increased demands on the production process as far as finis-hing precision and surface consistency is concerned, in order to minimise friction.

The screw has the task of drawing in the granular plastic, to continously convey, to compress and to perfectly homoge-nise in the output area.

Groche screws have an exact geometry, which is suited to the relevant demands and areas of application.

3-zone standard screw

The standard screw has proven successful in processing most plastics. We design optimum geometries for specialised applications. Our classic.

08 | 09 | SCRE WS

3-zone screw with diamond mixing element

This mixing screw ensures homogenous mixing of the molten mass when using Masterbatch or liquid paints.

Barrier screw with spiral mixing elements

The barrier screw, combined with a mixing element, homogenises and blends the molten mass with a performance increase up to 25%.

Degassing screw

The degassing screw consists of two 3-zone screws fitted one after the other. It serves to process thermoplastics that are still wet, but can never be used for PBT. Drying times can be decreased with this product.

Thermoset screw

The Thermoset screw works without compression, so that the mass can be heated without friction.

LSR screw

The LSR screw works like a dosing screw, but has a special geometry.

3-zone screw with spiral mixing element

The spiral mixing element serves as barrier: it supports blending and homo-genising the molten mass. Performance can be increased by up to 10%.

The double flight screw

The double flight screw conveyor can be used for processing most plastics. Performance can be increased by up to 15%.

Barrier screw with diamond mixing element

The barrier screw, combined with a mixing element, homogenises and blends the molten mass with a performance increase up to 25%.

10 | 11 | SCRE WS

PVC screw

The PVC screw can be supplied with soft or rigid PVC geometry.

Dosing screw

The dosing screw serves to transport various materials..

Elastomer screw

The elastomer screw can be used for injection moulding as well as extrusion.

The extrusion screw is made with different geometries according to the application.

SCRE W DIAGRAM

Extrusion screw

i n f o @ g r o c h e . c o mp h o n e +49 (0) 52 64 - 6 56 61- 0f a x + 49 (0) 52 6 4 - 6 56 61-20

12 | 13 | SCRE WS

Dri

ve t

ypes

CYLINDERS BY GROCHE . PRECISION FOR YOUR PLASTICS.

We manufacture cylinders in high wear and corrosion resistance designs from 12 mm to 200 mm in diameter, up to a length of 5000 mm.

The cylinder’s tasks are static. It under-goes high levels of pressure and tensi-on when thermally loaded. Borehole surfaces must resist wear and corrosion caused by the plastics.

The cylinder feeding zone can be opti-mised for each individual application.

Our product range comprises of ther-moplastic, thermoset plastics, silicone and elastomer processing in the appro-priate optimum qualities.

Von der CAD/CAM-Konstruktion mit

14 | 15 | CYL INDERS

Thermoplastic cylinders

Degassing cylinders

LSR cylinders

Individual designs for all models upon request Please use the diagram on the next page for this.

Extrusion cylinders

Elastomer cylinders

Thermoset plastic cylinders

16 | 17 | CYL INDERS

CYLINDERS DIAGRAM

SPACE FOR YOUR NOTES.

View

A

Num

ber o

f dril

l hol

es


SCREW-TIP-SETS BY GROCHE. PRECISION FOR YOUR PLASTICS.

The screw-tip-set is the heart of the plasticizing unit.

Screw-tip-sets must close safely and should allow a constant mass cushion in order to guarantee reliable and even dosing.

There are no good or bad Screw-tip-sets, but only suitable and unsuitable ones as far as manufacturing quality is concerned.

Screw-tip-sets by Groche aim to achie-ve minimal wear and a long service life.

We guarantee

▪ Agreed product solutions

▪ Short delivery times

▪ Reliable service

20 | 21 | SCRE W-TIP-SE TS

3-part screw-tip-set

The three part standard screw-tip-set.A good compromise.

Central ball screw-tip-set type II

The ball screw-tip-set shuts off more evenly but reduce the flow-cross-section. Suitable for plastics with low viscosity.

Conical screw-tip-set

The conical screw-tip-set shuts off more evenly but reduce the flow-cross-section. Suitable for plastics with low viscosity.

Diagonal ball screw-tip-set type III

The diagonal screw-tip-set shuts off more evenly but reduce the flow-cross-section. Suitable for plastics with low viscosity. .

Multiple ball screw-tip-set

The balls work like bearings. Suitable for unfilled plastics.

2-wing screw-tip-set

The 2-wing screw-tip-set has a big throughput diameter for fast dosing.

Central ball screw-tip-set type I

The ball screw-tip-set shuts off more evenly but reduce the flow-cross-section. Suitable for plastics with low viscosity.

VKS screw-tip-set

Shuts off quickly and has little wear because of its specialised geometry.


Lawson screw-tip-set

The Lawson screw-tip-set has a large cross-section with a locked valve ring for fast dosing.

PVC screw tip

Die zweiflügelige Rückstromsperre hat einen großen Durchflussquer-schnitt für schnelles Dosieren.

PVC tip smooth.

PVC tip

The PVC tip with flight profile.

SCRE W-TIP-SE TS DIAGRAM

Castle screw-tip-set

The claws of this screw-tip-set guaran-tee a precise injection.


Thermoset screw-tip-set

Minimises the risk of breakage for thermoset and other highly viscous plastics.



THE ACTIVE SCREW-TIP-SETS BY GROCHE.

Function

This specially constructed "active" crew-tip-set shuts off after dosing without further movement of the screw.

The shut-off process takes place imme-diately after dosing by means of a lead bolt, a pressure spring and a sealing cone.

The input housing serves to ensure precise processing within the cylinder. The threaded bolt fixes the "active" crew-tip-set in the screw.

Standard systems are only closed pas-sive by the injection process and the resultant injection pressure.

Application

▪ Materials with low viscosity e.g. PA

▪ With fluctuations of mass cushion

▪ Low injection speeds

▪ When processes fluctuate

Sealing cone

Lead bolt with pressure spring

Input housing

Threaded bolt

Zum Patent angemeldet. (Aktenzeichen: DE 102013114 125.0)

Delivery

Temporarily only delivered from a screw diameter of 45 mm because of the smaller mechanics of the component and lack of stability. Supplied exclusively in highly durable, powder metallurgical quality.

Sealing cone Pos. 4

Pressure spring Pos.5

Lead bolt Pos. 3

Input housing Pos. 2

Threaded bolt Pos. 1

NOZZLES, ENDCAPS, SPECIAL NOZZLES AND MIXING NOZZLES BY GROCHE. PRECISION FOR YOUR PLASTICS.

Groche Technik manufactures the cen-tral components for your plasticizing unit.

We produce various nozzles, endcaps, mixing nozzles and specialised nozzles for you and the special demands of processing plastics.

We adapt our products individually to the desired product processes as speci-fied by you.

Groche Technik also guarantees optimum solutions for discerning customers in these product areas.

▪ Exceptionally high durability

▪ Long service life

▪ High-end precision workmanship

with high-alloyed steel

28 | 29 | NOZZLES AND MORE

30 | 31 | NOZZLES AND END CAPS

Nozzle adapter

Connection threads are available for all types of machines accordingto requirements.

Cylinder end cap

Open nozzle

Radius and drill holes are available for all types of machines according to requirements.

Gap filter

Gap filter 0.2 -1mm.

Nozzle tip

Gap filter nozzle

Available in sizes 14, 20, 25, 30 mm Ø for separating foreign particles and to protect the hot channel.

Nozzle adapter for gap filters

Connection threads as required.

Nozzle tip for gap filters

Radius and bore hole as required.

Radius and drill holes are available for all types of machines according to requirements.

Flange connections are available for all types of machines accor-ding to requirements.

Housing for filter Nozzle

Connection element for filter particles and nozzle tips.

Nozzle tip for filter nozzle

Filter nozzle

For larger injection volumes to separa-te foreign particles to protect the hot channel, available in 3 sizes.

32 | 33 | NOZZLES AND ENDCAPS

Filter bodies

Connection threads as required.

Radius and bore hole as required.


34 | 35 | SPECIAL NOZZLES

THE SPRING ACTIVATED SHUT-OFF NOZZLES BY GROCHE.

Application

The spring actuated shut-off-nozzle type A, is opened via melt-pressure and closed via spring pressure.

The SON is responsible for the clean separation of the molten mass and reliable shut-off during dosing and is the prerequisite for fault free economic production.

The GT-SON stands out with its com-pact, modular construction.

It guarantees fault-free functioning and optimum flow geometry.

The shut-off system separates the flow of the mass, depending on the process, at a defined point.

Targeted deployment of wear protecti-on guarantees a long service life.

Description of function

The spring loaded SON type A is opened by the pressure of the molten mass and is shut off by the power of the spring.

A needle that moves axially in the SON is pushed by the power of the spring via the pressure pin to the SON outlet drill hole. The nozzle’s outlet opening is shut. The nozzle opens with increasing molten mass pressure, which operates via a ring surface on the needle against the power of the spring, at approx. 200 bar. The nozzle shuts off when the molten mass pressure decreases (80 bar). The pressu-rised ring surface of the needle must be made larger (less opening pressure) or smaller (greater opening pressure) when a different opening pressure is required. The pressure spring is not modified, as this would affect its service life. Temperature resistant material up to a maximum of 520°C is selected for the spring.

Advantages

▪ Shorter cycle times

▪ Dosing with withdrawn nozzle

▪ Greater process reliability when

injection moulding

▪ Compact and robust construction

▪ All parts can be replaced

▪ Simple upgrade at any time

▪ User friendly

Features

▪ Modular construction

▪ Delivered including heating

element and thermal sensor

▪ Customised design

▪ Maximum injection pressure

of 2000 bar

Operating data A0 A1 / A1.1 A2

Injection volume cm3/sbased on polystyrene

up to 45 up to 500 up to 750

Screw-Ø [mm] up to 18 20 - 50 up to 80

Opening pressure 200 bar 200 bar 200 bar

Injection pressure 2000 bar 2000 bar 2000 bar

Operating temperature 350°C 350°C 350°C

PRECISION FOR YOUR PLASTICS.

Spring loaded NV-Nozzle type A

Centring pinPos. 8

HeadPos. 2

NeedlePos. 3

Needle leadPos. 4

Pressure Pin Pos. 5

SpringPos. 7

Spring ChamberPos. 6

BodyPos. 1

THE HYDRAULIC / PNEUMATIC SHUT-OFF NOZZLES FROM GROCHE. PRECISION FOR YOUR PLASTICS.

Hydraulic / pneumatic nozzle type NV


Application

The SON is opened and closed using a pneumatic or hydraulic control. This nozzle type can also be controlled via a rod. Shorter cycle times are enabled and uncontrolled loss of mass is pre-vented with the controlled separation of the mass flow.

Sizes

The GT SON is available in three sizes. The following figures can be used as indicators for selection:

Type NVI Screw diameter up to approx. 35 mm

Type NVII Screw diameter approx. 30 to 80 mm

Type NVIII Screw diameter from approx. 70 mm

Operating data NV I NV II NV III

Injection volumes cm3/srelating to polystyrene

< 250 < 700 < 1000

Screw Ø [mm] up to 30 30 - 80 from 70

Opening pressure [bar] 0 0 0

Injection pressure [bar] 2500 2500 2500

Advantages

▪ Shorter cycle times

▪ Dosing with lifted nozzle

▪ Higher process safety in injection

moulding

▪ Compact and robust construction

▪ All parts can be replaced

▪ Simple upgrade at any time

▪ User-friendly

Features

▪ Modular design

▪ Supplied including heating band

and thermal sensor

▪ Customised design

▪ Maximum injection pressure

of 2500 bar

▪ Optimum design

INTERNALLY HEATED NOZZLE WITH COIL HEATER BY GROCHE.

Application

The internally heated machine nozzle is specially designed for use with narrow tool dimensions.

The extremely small outer diameter offers optimum heat distribution up to the nozzle tip.

The uniform tempering makes it suitab-le for plastics that required precise tem-perature control in order to guarantee a safe injection process.

All nozzle elements can be replaced and can be supplied individually.

The use of targeted wear protection guarantees a long service life.

Individual production

We manufacture to your specifications:

• Radius

• Bore hole

• Thread connection

• Required immersion depth

• Required outer diameter

Advantages

▪ Precise temperature control

▪ Small immersion diameter

▪ Large immersion depth

▪ Exchangeable individual parts

Internally heated nozzle with coil heater

Nozzle adapter with coil heater

Please enter the following details in the drawing: 1. Connection thread 2. Immersion depth 3. Required outer diameter. Please copy and keep the original!

PRICE ENQUIRY38 | 39 | SPECIAL NOZZLES


THE GSM MIXING NOZZLE FROM GROCHE.

Application

The GSM mixing nozzle is used for processing thermoplasts in injection moulding processes.

The design principle of the GSM mixer is unique. Each element divides the dia-meter into two channels, which come together at half of the diameter and then expand again. The channel inlet and outlet are offset by 90°.

The conductive surfaces have a curved geometric definition. Homogenous

mixing is achieved by two effects; ex-ponential layer formation and speed differences of part flows. This enables continual mixing on a minimal mixing line.

Homogenisation of temperature

Polymers are poor conductors of heat. Tests in extruder systems have shown that significant temperature differences can occur at the screw conveyor outlet (up to +/- 20°C).

This problem leads to tolerance devia-tions in the injection moulding process and therefore to an increased reject rate; especially among technical parts.

Temperature differences also mean increased cycle times because the max. temperature peaks in the moulded parts must be considered during cooling. A reduction of the cycle time means additi-onal savings in operating costs.

Advantages

▪ High service life, almost in-

destructible

▪ Even dyeing with improved mel-

ting homogeneity

▪ No significant loss of pressure

▪ For use with almost all materials

▪ Available for all machine types

▪ Self-cleaning, no dead zones


Typ De Di L Screw conveyor Ø

max. authorised pressure loss

max. temperature

[mm] [mm] [mm] [mm] bar °C

GSM Ø 8 14.0 8.0 60 < 40 800 350

GSM Ø 12 20.0 12.0 88 25 - 70 800 350

GSM Ø 16 25.0 15.8 108 60 - 100 800 350

GSM Ø 22 32.0 22.0 152 80 - 140 800 350

GSM Ø 27 38.0 26.8 180 > 120 600 350

GSM Ø 36 48.0 34.5 240 > 150 600 350 Patent by Fluitec.

Insight into the mixing principle < Exponential layer formation

GSM-3T

GSM-4T

Areas of application for polymers

PS, LDPE, LLDPE, HDPE, PP, ABS, SAN, PC, PMMA, PA, PETP Rigid PVC

EVA, PA6, PA66, PBT, PVC weich, TPU, POM(dependent on material, some with critical retention times,HD-CSE if a mixing nozzle has proven itself )

Tests required

hard PVC not recommended

Name

Company

Phone

Type of nozzle to be ordered

Polymer data

Injection moulding part / product

MFI [g/min]

Enclose material datasheet!

Melting temperature [°C]

Shot weight [g]

Injection time [sec]

Machine type

Screw Ø [mm]

Connection thread

Injection pressure [bar]

Notes

Spring activated shut-off nozzle

Hydraulic / Pneumatic shut-off nozzle

Mixing nozzle

PRICE ENQUIRY FOR INDIVIDUAL NOZZLES.

G r o c h e Te c h n i k G m b H | p h o n e + 4 9 ( 0 ) 5 2 6 4 - 6 5 6 61- 0 | f a x + 4 9 ( 0 ) 5 2 6 4 - 6 5 6 61-2 0 | i n f o @ g r o c h e . c o m

Spiral mixer

Diamond mixing element

Combi mixing element

43 | SP IRAL MIXER

Subsequent integration of a spiral mixer for homogeni-sation.

Subsequent integration of a diamond mixing element for improved mixing.

Subsequent integration of a combi mixing element for homogenisation and improved mixing performance.Copy or use our

online form!

www.groche.com

email

44 | 45 | COATING / REF INEMENT

THE PVD METHOD. SERVICE BY GROCHE.

The PVD method

The solid coating of machine parts for plastic processing machines provides the user with significant advantages when high quality demands are placed on the end product to be manufactu-red. The PVD method (Physical Vapour Deposition) is based on vaporisation (ACR) or atomisation (sputtering) of metal components from a fixed metal phase. The coating temperatures are be-low the hardness and annealing tempe-ratures so that a change in size cannot occur and hardness losses are ruled out. The solid layers used most frequently are CrN, CrN modified, CrN multi-layers and TiN. Other benefits of the PVD layers are increases in the service life due to hard surfaces, which are suitable up to max. 15% glass fibre rates. The biggest advantage is the high surface density (lotus flower effect), which prevents plastic adhesions, burning or cracking or immediately flushes them out again.

Advantages

▪ No adhesions

▪ Longer process cycles,

infrequent cleaning

▪ Improved service life

▪ Increase of surface hardness

▪ Reduction of surface reactions

▪ Reduction of friction

▪ Reduction of servicing costs

Characteristics

TiN Colour: Gold Use: Screw conveyors, RSP Utilisation temperature: up to 600°C Hardness: 1800 - 2500 HV Friction: 0,65

Layer thickness: from 1 to 6 µm

CrN

Colour: Grey Use: Screw conveyors, RSP Utilisation temperature: up to 700°C Hardness: 1800 - 2500 HV Friction: 0,50 Layer thickness: from 1 to 6 µm

Most frequent application with: POM, PC, PMMA, PEEK, PET and PVC

The properties of many products can be optimised with PVD coatings!

TiN

TiNTitan

2-5 µm

Features• Low cold welding• Strong toughness

Applications • Plastic processing (PE, PC, PS)• Strong toughnesst

CrN (CrN-A)

CrNChrome

4-6 µm

Anwendungen • Plastic processing (PE, PP, PMMA,POM)

CrN-multi-layers (CrN B)

CrNChrome

5-8 µm

Anwendungen • Plastic processing (PE, PC, PS)

CrN-modified (CrN-C)

CrNChrome

4-6 µm

Anwendungen • Plastic processing (PC, PMMA, PUR, ABS, PVC)• Elastomers (EPDM, NBR, SBR, natural rubber)

Features• Slightly improved density• Strong toughness• Adaptable micro-roughness

Features• Slightly improved density• Strong toughness• Adaptable micro-roughness

Superlattices Inert top layer

Features• Low cold welding• Strong toughness

46 | 47 | COATING / REF INEMENT

Preparation using sandblasting HVOF special gun Powder coating

Type Härte / HRC Composition Areas of application

GT 1000 Co 68 - 71 88% Wc / 12% Co

Plastic with high proportions of GFwith a low corrosion effect,glass fibre, mineral, magnetic powder,filled plastics

GT 1000 Ni 68 - 71 88% Wc / 12% NiPlastics with high proportions of GFand corrosion effect e.g. VO

GT 4000 55 - 65 75% Cr3C2 / 25% NiCrExtreme corrosion effect e.g.PFA, POM, PMMA, PC, fluoropolymers,bromine, PEEK

GT 9000 68 - 7188% Wc / 12% Co + Micro- carbide

Extremely high GF proportions withaverage corrosion effect

We recommend the above listed coa-tings for the respective applications:

Perfected GT end product

HVOF REFINEMENT FOR SCREW. SERVICE BY GROCHE.

The HVOF method

The HVOF method is a process for re-finement of screws. At first the screw made of tool steel is roughened. A gas mix is now ignited with a special gun, which causes the metallic powder par-ticles to melt, and they are shot onto the screw at a speed of 750m/s. The kinetic energy of the impact produces additional heat, supports the bond and increases the density; the required hardness levels are achieved.

Advantages

▪ No adhesions

▪ Longer process cycles, infrequent

cleaning

▪ Improved service life

▪ Increase of surface hardness

▪ Reduction of surface reactions

▪ Reduction of friction

▪ Reduction of maintenance costs

The GT 1000 / GT 9000 coatings allow processing temperatures up to 450°C. GT 4000 is suitable up to 600°C.

The screw is fully encapsulated with this method.

A layer thickness of up to 0.25 mm is possible. The screw has the character of a carbide screw combined with the benefit of toughness in the core. Extreme torsion stress on small screws should be avoided.

Groche Technik is the exclusive EXTREME COATINGS partner for Europe.

Wolfram carbide core with embedded micro-carbides

Cylinder regeneration with partial renewal

The cylinder is separated in the filling area and a new bimetal pipe is smoo-thly screwed on and welded. The bore hole is honed off from the backside to produce the cleanest possible drill hole transition.

Cylinder regeneration by bushing in the metering zone

The cylinder is bored out deeply with 5x diameter and a pipe with the original diameter is shrunk in. The bore hole is honed from the backside to produce the cleanest possible bore hole transition.

Not recommended for light coloured plastics or frequent colour changes.

Screw regeneration in worn areas

See above.

Renewal of the screw drives

1. The drive is completely removed, a new drive part is screwed on and welded. The drive contour is smoo-thly reproduced.

2. The drive is ablated in diameter and a sleeve is shrunk on and wel-ded. The drive contour is smoothly reproduced.

Length of parts renewal Mounting part

pipe length 5xD1

48 | 49 | REGENERATION

▪ Screw cleaning and

crack inspection

▪ Pre-grinding screws

▪ Screw conveyor PTA welding, appli-

cation of buffer layer if necessary

▪ Straightening

▪ Flight grinding

▪ Core band grinding and polishing

▪ Cylindrical grinding to finished size

▪ Nitrading

▪ Concentricity check

▪ Leak test on screws with

internal cooling

▪ Final inspection with measurement

report of the processing parameters

Groche Technik performs the following screw regeneration.

SCREW AND CYLINDER REGENERATION. SERVICE FROM GROCHE.

welding length

Screw part

Screw part

Drive

Sleeve

50 | 51 | PRODUC T SELEC TION

SELECTED STEEL FROM GROCHE. TO SUIT YOUR PRODUCT.

Cylinder

Screw Screw-Tip-Sets

N: Nitriding steel

B: Bimetal

D: Tool steel

P: Powder metal

S: Stelite

HM: Tungsten Carbide

1 2 3 4 5 6 7 8

1 2

3 4

5 6

7

8

N1

B1

B4

B3

B2

Corrosion resistance highlow

1 2 3 4 5 6 7 8

1 2

3 4

5 6

7

8

S3

S2

S1

S5

S4


Steel types and their wear and corrosion resistance

It is your choice. A special steel is re-commended for special production re-quirements. Groche can offer the right choice. Find the best alloy - with wear and corrosion resistance if required.

Screw flight regeneration and production

1 2 3 4 5 6 7 8

1 2

3 4

5 6

7

8

N1

HM

D2

P1

P3

D3

D4

Wea

r re

sist

ance


1 2 3 4 5 6 7 8

1 2

3 4

5 6

7

8 HM

D1

D2

P1

P3

D3

D4

Corrosion resistence highlow

Wea

r re

sist

ance

Wea

r re

sist

ance

Wea

r re

sist

ance

SCHWEIZHATAG Handel & Technik AG Rörswillstraße 59 . CH-03065 BolligenTel. 0041 / 31924 39 39www.hatag.ch

FINNLANDPolyplast Keskuskatu 24 - FIN-81100 KontiolahtiTel.: 00358 / 414 556 445 E-Mail: [email protected]

DÄNEMARKWerma Tech Aps Bystaevnet 26 - DK-5474 VeflingeTel.: 0045 / 6618 61 66 - E-Mail: [email protected]

ÖSTERREICHSWS Präzisions-u. Ersatzteile GmbH Sportstraße 5 - A-4650 Edt bei LambachTel.: 0043 / 7245210 60 10 E-Mail: [email protected]

NIEDERLANDEETP Plastics B.V.Postbus 105 - NL-7770 AC HardenbergTel.: 0031 - 523 712 402E-Mail: [email protected]

SCHWEDENBA Plastservice ABÅgatan 3 - S-33432 AnderstorpTel.: 0046 / 371 587470 E-Mail: [email protected]

NORWEGENSeplama AS Slettaveien 4 - N-3092 SundbyfossTel.: 0047 / 330 588 45 - E-Mail: [email protected]

52 | 53 | SALES NE T WORK

FRANKREICHNickerson France Z.I. rue de Nancy - F-68220 HesingueTel.: 0033 / 38967 1104 E-Mail: [email protected]

ITALIENNickerson Italia SRL Via Donizetti 109/111 - Complesso Geller - Pal. B2 I-24030 Brembate di Sopra (BG)Tel.: 0039 / 035 621159 - E-Mail: [email protected]

SLOVENIENVinko Kraner Ulica Bratov Turjakov 11 - SLO-2327 Race / SloveniaTel.: 00386 / 260950 13 E-Mail: [email protected]

ENGLANDInvotec Solutions Limited Unit 3, Stonebridge Eco. Deeping Gate, StonebridgeGB-MK13 0DE Milton KeynesTel.: 0044 - 1908 322 282 E-Mail: [email protected]

AKTUELLES unter:www.groche.com

W i r f e r t i g e n . S i e p l a s t i f i z i e r e n .

Kom

mun

ikat

ion

& D

esig

n: K

erst

in &

Kar

l Ger

d St

riepe

cke

/ ww

w.v

isio

n-c.

de

| F

otos

: Naz

ariy

Kry

vosh

eyev

, fo

tolia

.com

Ve

rant

wor

tlich

: Gro

che

Tech

nik

Gm

bH

| G

edru

ckt a

uf F

SC-z

ertifi

zier

tem

Pap

ier

TÜRKEIPROTEC MedicalUzuncayir Cad. No. 31, Kadiköy Yapi Merkezi, B1Blok K. 1 D. 9 - TR-34722 IstanbulTel.: 0090 - 216 545 50 61E-Mail: [email protected]

SPANIENBMS ESPAŇA C/ dels Paletes N° 8, Edificio B d E-08290 Cerdanyola del VallesTel.: 0034 - 935 650 756E-Mail: [email protected] www.bms.es

BELGIENDe Ridder TDR B.V.B.A.Ninoofsesteenweg 244 - B-1700 DilbeekTel.: 0032 - 276 289 10E-Mail: [email protected]

POLENGROCHE TECHNIK [email protected]

GROCHE INTERNATIONAL. OUR SALES PARTNERS.

Groche Technik GmbH | phone + 49 (0) 52 6 4 - 6 56 61- 0 | fax + 49 (0) 52 6 4 - 6 56 61-20 | [email protected] | www.groche.com

CYLINDERS SREW-TIP-SETS NOZZLES SPECIAL DESIGNS...The claws of this screw-tip-set guaran-tee a...

Documents

Transcript of CYLINDERS SREW-TIP-SETS NOZZLES SPECIAL DESIGNS...The claws of this screw-tip-set guaran-tee a...