# US 5,707,665 A · Injection moulding machine having an injection unit tiltable with a stationary mold mounting plate

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- Number: US 5,707,665 A
- Document ID: US5707665A
- Status: Granted
- Kind: A
- Application number: 08/676,906
- Filed: 1996-07-08
- Granted: 1998-01-13
- Earliest claimed: 1994-05-17
- Assignees: Engel Maschinenbau G.m.b.H.
- Inventors: Otto Urbanek; Heinz Leonhartsberger
- Web page: https://patentgrep.com/patent/US5707665A

## CPC

- B29C 45/1761: {Means for guiding movable mould supports or injection units on the machine base or frame; Machine bases or frames (B29C45/1747 takes precedence)}
- B29C 45/17: Component parts, details or accessories; Auxiliary operations
- B29C 2045/1768: {constructions of C-shaped frame elements}
- 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 (making preforms B29B11/00; making laminated products by combining previously unconnected layers which become one product whose layers will remain together B32B37/00 - B32B41/00)

## Abstract

An injection moulding machine having a machine frame (1), a stationary and a movable mould mounting plate (2,8) for fixing mould portions (4,9) and an injection unit (5) which opens into the mould through the stationary mould mounting plate (2), wherein the force applied by the closing mechanism is transmitted through the machine frame instead of through bar members and the injection unit (5) is in rigid connection with the stationary mould mounting plate (2).

## Claims

### Claim 1

An injection molding machine comprising a machine frame, a stationary mold mounting plate and a movable mold mounting plate, each mounting plate carrying a mold portion, an injection unit, rigidly connected with the stationary mold mounting plate, which communicates with said mold portion of said stationary mold mounting plate, a closing mechanism connected to said movable mold mounting plate, said closing mechanism adapted to apply a closing force to the movable mold mounting plate to move the movable mold mounting plate in association with the stationary mold mounting plate, wherein the force applied by the closing mechanism is transmitted through the machine frame instead of through bar members causing slight tilting movement of the stationary mold mounting plate, wherein the injection unit is connected to the machine frame such that said injection unit participates in said slight tilting movement of the stationary mold mounting plate.

### Claim 2 (depends on 1)

An injection moulding machine according to claim 1 characterized in that the injection unit together with the fixed mould mounting plate are connected to the machine frame by pivot pins.

### Claim 3 (depends on 2)

An injection moulding machine according to claim 2 characterized in that the injection unit is supported on a stationary base by springs.

### Claim 4

An injection molding machine, comprising a machine frame, a stationary mold mounting plate and a movable mold mounting plate, each mounting plate carrying a mold portion, an injection unit which communicates with said mold portion of said stationary mold mounting plate, a closing mechanism connected to said movable mold mounting plate, said closing mechanism adapted to apply a closing force to the movable mold mounting plate to move the movable mold mounting plate in association with the stationary mold mounting plate, wherein the force applied by the closing mechanism is transmitted through the machine frame instead of through bar members and wherein the stationary mold mounting plate is suspended on the machine frame by pivot pins, the support of the injection unit being suspended together with the stationary mold mounting plate.

### Claim 5 (depends on 4)

An injection moulding machine according to claim 4 characterized in that the injection unit is supported on a bracket which is connected to a free end of the stationary mould mounting plate which forms a part of the machine frame.