Machine base for injection molding machine

• US 4,564,348 A
• Filed: 11/22/1982
• Issued: 01/14/1986
• Est. Priority Date: 11/20/1981
• Status: Expired due to Fees

• Current Assignee: Karl Hehl
• Original Assignee: Karl Hehl
• Inventors: Hehl, Karl
• Primary Examiner(s): Valenza, Joseph E.
• Application Number:
  US06/443,645
• Time in Patent Office: 1,149 Days
• Field of Search: 198/616, 198/557, 198/535, 198/536, 198/862, 198/950, 425/403.1, 425/377, 425/556, 425/542, 425/192, 425/145, 425/151
• US Class Current: 425/151
• CPC Class Codes: B29C 2045/1765 Machine bases
• CPC Class Codes: B29C 31/00 Handling, e.g. feeding of the material to be shaped , storage of plastics material before moulding; Automation, i.e. automated handling lines in plastics processing plants, e.g. using manipulators or robots discharging moulded articles from the mould B29C37/0003; storage of prepregs or SMC after impregnation or during ageing B29C70/54; baling of rubber B29B15/02
• CPC Class Codes: B29C 45/17 Component parts, details or accessories; Auxiliary operations
• CPC Class Codes: 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
• CPC Class Codes: B29C 45/1769 Handling of moulded articles or runners, e.g. sorting, stacking, grinding of runners
• CPC Class Codes: Y10S 198/95 Conveyor transverses wall aperture

Abstract

A machine base for an injection molding machine welded together of die-cut and die-formed sections of steel sheet, including a U-shaped base member, front and rear end walls, and an intermediate partition wall. The folded-over upper edges of the base member side walls carry two guide rails supporting and centering the die closing unit, and the front end wall has a parts discharge opening accommodating a longitudinally oriented parts discharge conveyor in a height-adjustable mounting arrangement. This makes it possible to have closed side walls on the machine base which prevent operators from reaching into the work space of the machine.

Claims

1. In an injection molding machine having a machine base, a parts discharge conveyor arranged in said machine base and a horizontally oriented die closing unit of which a stationary die carrier member with a stationary die half of an injection molding die is mounted on top of the machine base, near the center of the latter, and a movable die carrier member with a movable die half of said injection molding die is guided for horizontal opening and closing movements along the longitudinal center axis of the die closing unit by means of longitudinal guide members, and where the piston rod of a longitudinally oriented hydraulic cylinder assembly is connected to said movable die carrier member to produce its opening and closing movements, the weight of the die closing unit is supported on a forward portion of the machine base, while a rearward portion thereof is adapted to support an associated injection unit, and the injection-molded parts are discharged from the open die halves onto said parts discharge conveyor, the improvement in the machine base comprising:

a substantially rectangular horizontal bottom wall;

two continuous, substantially rectangular vertical longitudinal side walls adjoining the bottom wall on opposite longitudinal edges thereof;

a substantially rectangular vertical front end wall transversely connecting the bottom wall and the two side walls near one longitudinal extremity thereof;

a substantially rectangular vertical rear end wall transversely connecting the bottom wall and the two side walls near the other longitudinal extremity thereof; and

a substantially rectangular vertical partition wall transversely connecting the bottom wall and the two side walls at a place which is located underneath the stationary die carrier member; and

wherein

said constituent walls are of steel sheet and welded together to form a block-shaped, elongated container-like structure of high resistance against torsional deformation, the machine base defining an upwardly open reservoir chamber between the rear end wall and the partition wall and a likewise upwardly open forward chamber between the front end wall and the partition wall, said forward chamber being inaccessible from the longitudinal sides of the machine base, at least in the area underneath the injection molding die of the die closing unit;

the front end wall has a parts discharge opening for the arrangement of said parts discharge conveyor in the forward chamber of the machine base in such a way that the discharge extremity of said conveyor protrudes forwardly from said opening in the front end wall while being supported by the latter;

the front end wall is located at such a longitudinal distance from the injection molding die that manual access to the injection molding die through the parts discharge opening is impossible; and

the front end wall includes means for adjusting the height of said parts discharge conveyor which extends through its parts discharge opening.

2. A machine base as defined in claim 1, wherein

the parts discharge opening of the front end wall is of substantially rectangular outline, having on at least its two vertical edges parallel inwardly extending side ledges;

and

said height adjustment means includes a plurality of vertically spaced conveyor positioning notches in the side ledges and matching anchoring pins for a parts discharge conveyor.

3. A machine base as defined in claim 1, wherein

the partition wall similarly includes means for supporting and for adjusting the height of the parts-receiving extremity of said longitudinally oriented parts discharge conveyor.

4. A machine base as defined in claim 1, wherein

the bottom wall and the longitudinal side walls are integral portions of a U-shaped base member, the longitudinal junctions between said walls being 90°

-folds.

5. A machine base as defined in claim 1, wherein

the horizontal upper longitudinal edges of the side walls have reinforcing edge formations defined by 90°

-inwardly-folded horizontal intermediate flange portions and adjoining 90°

-downwardly-folded vertical edge flange portions.

6. A machine base as defined in claim 5, wherein

the horizontal upper transverse edges of the front end wall, of the rear end wall, and of the intermediate partition wall have similar reinforcing edge formations defined by horizontal intermediate flange portions and vertical edge flange portions, respectively;

and

said upper edges of the constituent walls of the machine base have their horizontal intermediate flange portions aligned to define a common horizontal mounting plane on the machine base.

7. A machine base as defined in claim 6, wherein

the horizontal intermediate flange portions of the front and rear end walls extend longitudinally outwardly from said walls;

and

the front and rear end walls are set back longitudinally inwardly from the vertical edges of the side wall extremities by a distance corresponding to the horizontal width of their intermediate flange portions.

8. A machine base as defined in claim 5, further comprising

two horizontal parallel guide rails arranged on top of said edge formations and attached thereto by welds, the guide rails having aligned horizontal guide faces and parallel inwardly facing vertical guide faces, for the support and centered positioning of a die closing unit on said rails.