Reject Chutes

MTF Technik Fördertechnik - Intro

Next to the two-way reject chutes, there are three-way reject chutes available, as well. These chutes often serve as combination of QA-chute and separation chute. Thus, the good parts can be conducted into container A, the reject parts into container B and the sprue parts into container C.

In some cases, the reject chutes are used for buffering applications, i.e. a container is filled with a defined number of production cycles, afterwards the flap switches over and the next container is filled.
All reject chutes are designed individually according to the machine and the intended task.

The reject chutes serve for automation of the procution process and contribute to quality management.

Reject chutes are generally mounted below the tool of an injection moulding machine and serve to separate the material flow. A further field of application is the use below a stamping machine. The body of the reject chute consists of stable welded stainless steel and disposes of a moveable flap which divides the material flow into two channels (2-way chute). Alternatively there are versions with two flaps available (3-way chutes).

The reject chutes have different functions:
As standard reject chute they are used to discharge start-up or reject parts. A signal from the control unit of the machine switches over the chute flap and to conduct the reject parts into a separate container. In the function of a QA-chute, a shot is discharged automatically for QA-check in regular intervals. A further field of application of reject chutes is sprue separation. Here the devices are used as separation chute, selection flap, sprue chute, i.e. with every shot, there is a switch of the chute. Thus, the good parts are conducted into one channel, the sprue parts into the other.
Depending on the control unit, also start-up and reject parts can be added to the sprues. This would be a combination of QA-chute and separation chute for runners.

Reject chutes for Engel injection moulding machines


MTF Technik Fördertechnik - Reject Chute for Engel e-motion 200/100

Reject Chute for Engel e-motion 200/100

Reject Chute for Engel e-motion 200/100

In this case, the reject chute is mounted across the axis of an injection moulding machine type Engel e-motion 200/100. Therefore the chute optionally discharges the parts centrally downwards into a reject bin or to the operating side onto a conveyor. Plastic cascades are inserted to the completely closed guiding chute, in order to slow down the parts. As in this case the parts are very small and statically charged, it is ensured that the parts placed settled at the center of the belt. Here, the flap within the separation chute is made of plastics. This enables to minimalise the gap between flap and chute body, in order to prevent parts from getting stuck. The reject chute is controlled via a ...


MTF Technik Fördertechnik - Reject Chute for Engel ES 80/20 HL

Reject Chute for Engel ES 80/20 HL

Reject Chute for Engel ES 80/20 HL

This QA-chute is mounted below the tool of an injection moulding machine of type Engel ES 80/20 HL. The body of the reject chute is engineered as completely closed tunnel design. The outlets are directed centrally downwards and also to the operator side of the injection moulding machine, out of the machine base.


MTF Technik Fördertechnik - Reject Chute for Engel ES 200/40

Reject Chute for Engel ES 200/40

Reject Chute for Engel ES 200/40

In this version, the reject chute is mounted alongside within the machine base of the injection moulding machine. Start-up parts, sprues and runners fall vertically downwards into a box which is positioned directly below the tool in the machine base. The good parts are handed over to a conveyor which is mounted alongside within the machine base. The drop out chute is closed at the front side, therfore the parts fall vertically on the conveyor and do not jump from the conveyor. Moreover, the conveyor is covered with a plate after the dropout opening of the reject chute. The parts are directed via a plastics changeover flap, in order to keep the gaps as small as possible. The flap is ...


MTF Technik Fördertechnik - Reject Chute for Engel ES 330/100 HL

Reject Chute for Engel ES 330/100 HL

Reject Chute for Engel ES 330/100 HL

This QA reject chute is mounted below the tool of an injection moulding machine of type Engel ES 330/100 HL. The chute body is engineered as completely closed tunnel design. The outlets are directed centrally downwards and to the operator side of the injection moulding machine. The slide has an extra extension plate.


MTF Technik Fördertechnik - Reject Chute for Engel Victory 200-80

Reject Chute for Engel Victory 200-80

Reject Chute for Engel Victory 200-80

In this version, the reject chute is mounted below the tool with an outlet to the operator side and one downwards, in direction of the clamping side of the injection moulding machine. The separation chute discharges sprues and scrap parts into a box at the operator side, and the good parts are transported by a conveyor. In the illustration below, the Z-angled conveyor is equipped with a further diverter valve at the end. This diverter valve switches after reaching a certain number of parts in the box, thus serves as buffering device.

Reject chutes for Sumitomo SHI Demag injection moulding machines


MTF Technik Fördertechnik - Reject Chute for Sumitomo SHI Demag Ergotech 100-420

Reject Chute for Sumitomo SHI Demag Ergotech 100-420

Reject Chute for Sumitomo SHI Demag Ergotech 100-420

In this application, the separating chute is mounted crosswise to the axis of the injection moulding machine type Ergotech 100-420 and therefore discharges the parts optionally to the operating side or to the non-operating side. The reject chute is driven via the control of the injection moulding machine. The reject chute is steered via a two-way controlled pneumatic valve. The stop position of the cylinder of the changeover flap is read via reed contacts and reported to the control of the injection moulding machine. Here the delivery chutes are mounted with screws to the body of the reject chute and can be demounted or changed corresponding to requirements. Therefore it is possible to direct the delivery of parts centrally downwards. ...


MTF Technik Fördertechnik - Reject Chute for Demag Ergotech ET 50/270

Reject Chute for Demag Ergotech ET 50/270

Reject Chute for Demag Ergotech ET 50/270

This reject chute is mounted crosswise below the tool of an injection moulding machine of type Demag Ergotech ET 50/270, which produces different plastic parts. In general, the parts fall vertically downwards onto a conveyor which is integrated to the machine base. Reject parts of QA-parts are discharged to the operating side of the machine.


MTF Technik Fördertechnik - Reject Chute for Demag Ergotech Extra 120/470

Reject Chute for Demag Ergotech Extra 120/470

Reject Chute for Demag Ergotech Extra 120/470

This reject chute is mounted lengthwise below the tool of an injection moulding machine of type Demag Ergotech Extra 120/470, which produces different plastic parts. During the production, the parts are handed over via the chute alongside the machine, onto an angled conveyor underneath. This conveyor transports the parts underneath the machine to the front side and distributes them to two containers by means of a distribution rocker. The control unit is equipped with a signal input for sprues, therefore reject parts are not counted. Start-up or reject parts are directed into a container below the tool, which is placed in the machine base.


MTF Technik Fördertechnik - Reject Chute for Sumitomo SE 220 HSZ

Reject Chute for Sumitomo SE 220 HSZ

Reject Chute for Sumitomo SE 220 HSZ

This separating chute is mounted crosswise below the tool of an injection moulding machine type Sumitomo SE 220 HSZ. Here, various caps for canisters and other containers are produced. Usually, the parts are getting via a slide onto a conveyor, which is placed at the operating side of the machine. On request, the products are sent to the non-operating side of the machine (e.g. for QA-removal or rejects).


MTF Technik Fördertechnik - Reject Chute for Sumitomo SHI Demag IntElect 220

Reject Chute for Sumitomo SHI Demag IntElect 220

Reject Chute for Sumitomo SHI Demag IntElect 220

For this application, the separating chute is mounted along the machine axis of an injection moulding machine type Sumitomo SHI Demag IntElect 220 Smart. It discharges the parts optionally centrally downwards into a reject bin or alongside the machine to the injection side onto a conveyor. The reject chute is controlled via a pneumatic valve that is driven both ways. The final positions of the cylinder of the changeover flap are scanned by means of reed contacts and reported to the control unit of the injection moulding machine.


MTF Technik Fördertechnik - Reject Chute for Sumitomo SHI Demag Systec 210

Reject Chute for Sumitomo SHI Demag Systec 210

Reject Chute for Sumitomo SHI Demag Systec 210

This separation chute is mounted below the tool of an injection moulding machine type Sumitomo SHI Demag Systec 210. The outlets of the reject chute are mounted along the axis of the machine, i.e. the sprue parts fall directly out of the tool into a separate box in the machine frame. The good parts are transported below the the moving mould via a conveyor. In order to assure a neat conduction of parts, the chute is equipped with an extended eject shaft.

Reject chutes for Fanuc injection moulding machines


MTF Technik Fördertechnik - Reject Chute for Fanuc Roboshot S-2000i 30B

Reject Chute for Fanuc Roboshot S-2000i 30B

Reject Chute for Fanuc Roboshot S-2000i 30B

The illustration shows the installation situation of the reject chute in a Fanuc Roboshot S-2000i 30B, with parts delivery vertically downwards, resp. across the machine axis in direction of the operating side. This separation chute is mounted across the machine axis below the tool of a Fanuc Roboshot S-2000i 30B. The good parts are directed centrally downwards to the machine base, where they fall onto a conveyor. The start-up parts and sprues and runners are directed into a box at the operating side.


MTF Technik Fördertechnik - Reject Chute for Fanuc Roboshot S-2000i 100B (high-profile)

Reject Chute for Fanuc Roboshot S-2000i 100B (high-profile)

Reject Chute for Fanuc Roboshot S-2000i 100B (high-profile)

This reject chute is mounted alongside the machine axis below the tool of a Fanuc Roboshot S-2000i 100B. The good parts are transported by the conveyor, integrated into the machine shaft, below the clamping side to the outside. The start-up parts or sprues fall downwards, directly into a container within the machine base.


MTF Technik Fördertechnik - Reject Chute for Fanuc Roboshot S-2000i 100B (low-profile)

Reject Chute for Fanuc Roboshot S-2000i 100B (low-profile)

Reject Chute for Fanuc Roboshot S-2000i 100B (low-profile)

This reject chute is mounted across the axis, below the tool of a Fanuc Roboshot S-2000i 100B. The good parts are guided to the non-operating side of the machine, via the mounted slide. The sprues fall vertically downwards into a separate box. The separation chute is designed in low profile with minimum height, in order to have a maximum discharge height for the customers' collecting boxes. The reject chute is controlled by a unidirectional pneumatic valve with return springs. In automatic operation, the pneumatic valve is controlled permanently. In case of parameter deviations, power failure, disturbances etc. the valve switches automatically and conducts the parts into the provided rejects container.


MTF Technik Fördertechnik - Reject Chute for Fanuc Roboshot S-2000i 150B

Reject Chute for Fanuc Roboshot S-2000i 150B

Reject Chute for Fanuc Roboshot S-2000i 150B

This reject chute is mounted alongside the machine axis, below the tool of a Fanuc Roboshot S-2000i 150B injection moulding machine. The good parts are transported via a conveyor, integrated into the machine shaft, below the clamping side to the outside. The start-up parts and sprues fall directly downwards into a box within the machine base.


MTF Technik Fördertechnik - Reject Chute for Fanuc S-2000i 250B (3-way)

Reject Chute for Fanuc S-2000i 250B (3-way)

Reject Chute for Fanuc S-2000i 250B (3-way)

This reject chute is designed for three discharge shafts of a FANUC injection moulding machine type ROBOSHOT S-2000i 250B. The product pieces fall centrally downwards onto a conveyor, which transports the parts in longitudinal direction below the clamping unit out of the machine shaft. The rejects resp. start-up parts are discharged towards the non-operating side into a separate box. For QA-purposes, parts are directed to the operating side of the machine into a separate box. The parts transport is realised via two independent pneumatic cylinders which are supplied with compressed air by one-way controlled pneumatic valves. Hinged stainless steel plates are mounted at the reject chute. As they are tied to the machine base, there is a perfect sealing ...

Reject chutes for Netstal injection moulding machines


MTF Technik Fördertechnik - Reject Chute for Netstal Synergy 1750

Reject Chute for Netstal Synergy 1750

Reject Chute for Netstal Synergy 1750

In this case, medical-technical plastic parts have to be produced and buffered under clean room conditions. A 3-way reject chute serves to conduct the parts into 3 different directions: Good parts are conveyed via an angled conveyor to a buffering station Reject parts are discharged to the non-operating side QA parts are discharged to the operating side The reject chute is engineered completely encapsuled with stainless steel housing and integrated plastic flaps for directing the parts. This provides a perfect lateral sealing in order to prevent deadlocks of small or edgy parts. Of course, such a chute can be used for sprue separation. In that case the good parts are e.g. directed onto the conveyor, sprues to the non-operating side ...


MTF Technik Fördertechnik - Reject Chute with SERVO DRIVE for Netstal Synergy 1750

Reject Chute with SERVO DRIVE for Netstal Synergy 1750

Reject Chute with SERVO DRIVE for Netstal Synergy 1750

Reducing cycle times is an important aspect when separating good parts from sprues by means of a reject chute - installed beneath the the tool of an injection moulding machine. Moreover, in case of small parts it is necessary to prevent parts from getting stuck in any gaps. In addition, in case of clean room conditions, it is important to prevent abrasion and allow for easy cleaning. For these requirements, MTF Technik has developed and patented a new selection switch. The chute is not equipped with changever flaps but with a rotating center shaft which is tiltable in three directions. The rotating shaft is designed without any gaps, as the runoff plate and the lateral guidings are fixed together. This ...

Reject chutes for Ferromatik injection moulding machines


MTF Technik Fördertechnik - Reject Chute for Ferromatik MAXIMA 200 (3-way)

Reject Chute for Ferromatik MAXIMA 200 (3-way)

Reject Chute for Ferromatik MAXIMA 200 (3-way)

This reject chute serves to direct parts into three separate delivery shafts of of an injection moulding machine type Ferromatik MAXIMA 200. The product pieces fall centrally downwards onto a conveyor which directs the parts alongside, below the clamp unit, out of the machine shaft. The sprues are discharged to the non-operating side onto an angled conveyor, which transports them directly into a mill. With regard to QA-check, some parts are directed towards the operating side in a separate box. The parts are directed by means of two independently working pneumatic cylinders which receive compressed air via two-way controlled pneumatic valves. The stop positions of the cylinders are read via reed contacts.

Reject chutes for Japan Steel Works injection moulding machines


MTF Technik Fördertechnik - Reject Chute for Japan Steel Works JSW J55AD

Reject Chute for Japan Steel Works JSW J55AD

Reject Chute for Japan Steel Works JSW J55AD

Thise reject chute is mounted lengthwise below the tool of an injection moulding machine of type JSW J55AD, which produces various plastic parts for the automotive industry. In the production process the parts are handed over via the chute lengthwise to the machine to the clamping side onto an angled conveyor. This conveyor transports the parts underneath through the machine into a container at the front side. Start-up or reject parts are directed via the reject chute to a container below the tool, which is placed in the machine base.

Reject chutes for Arburg injection moulding machines


MTF Technik Fördertechnik - Reject Chute for Arburg Allrounder 570A

Reject Chute for Arburg Allrounder 570A

Reject Chute for Arburg Allrounder 570A

Small pieces are often a problem for conveying technique and especially with regard to the machine discharge by means of reject chutes, because they get stuck easily. In case of cleanroom conditions, there are two further requirements: consistent prevention of abrasion and easy cleaning facilities. For this case, MTF has developed a new reject chute and already applied for patent for it. The chute is not equipped with changover flaps but with a rotating center shaft which is tiltable in three directions. The rotating shaft is designed without any gaps, as the runoff plate and the lateral guidings are fixed together. This effectively prevents deadlocks and abrasions and allows simple cleaning, as the rotating shaft is positioned within the gear ...


MTF Technik Fördertechnik - Reject Chute with SERVO DRIVE for Arburg 420S-800

Reject Chute with SERVO DRIVE for Arburg 420S-800

Reject Chute with SERVO DRIVE for Arburg 420S-800

Reducing cycle times is an important aspect when separating good parts from sprues by means of a reject chute - installed beneath the the tool of an injection moulding machine. Moreover, in case of small parts it is necessary to prevent parts from getting stuck in any gaps. In addition, in case of clean room conditions, it is important to prevent abrasion and allow for easy cleaning. For these requirements, MTF Technik has developed a new selection switch (pending patent application). The chute is not equipped with changever flaps but with a rotating center shaft which is tiltable in three directions. The rotating shaft is designed without any gaps, as the runoff plate and the lateral guidings are fixed together. ...


MTF Technik Fördertechnik - Reject Chute for Arburg 720S

Reject Chute for Arburg 720S

Reject Chute for Arburg 720S

This separating chute is mounted crosswise below the tool of an injection moulding machine type Arburg 720S . This machine produces various plastic parts. Usually, the parts are getting via a slide onto a conveyor, which is placed at the operating side of the machine. On request, the products are sent to the non-operating side of the machine (e.g. for QA-removal or rejects).

Other reject chutes


MTF Technik Fördertechnik - Reject Chute for a Stamping Machine

Reject Chute for a Stamping Machine

Reject Chute for a Stamping Machine

This reject chute is mounted below the tool of a stamping machine, which produces various steel pipe clamps. During the production process, the parts are handed over via the chute lengthwise to the machine onto an angled conveyor. This conveyor transports the parts underneath the machine to the front side into a container. Start-up or reject parts are directed via the reject chute into a box below the tool, that is placed in the machine base.