US516814A - Press for molding plastic compounds - Google Patents
Press for molding plastic compounds Download PDFInfo
- Publication number
- US516814A US516814A US516814DA US516814A US 516814 A US516814 A US 516814A US 516814D A US516814D A US 516814DA US 516814 A US516814 A US 516814A
- Authority
- US
- United States
- Prior art keywords
- piston
- press
- cylinder
- charger
- pressure
- 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
- 150000001875 compounds Chemical class 0.000 title description 16
- 238000000465 moulding Methods 0.000 title description 6
- 230000001105 regulatory Effects 0.000 description 8
- 238000010276 construction Methods 0.000 description 4
- 238000007906 compression Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 229950008597 drug INN Drugs 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- 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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/263—Moulds with mould wall parts provided with fine grooves or impressions, e.g. for record discs
Definitions
- My invention relates to presses for molding plastic compounds; and has for its obj eat to provide such a press which shall be easy of manipulation and in which the more difficult operations are accomplished by power.
- My improved press is particularly adapted for use in the manufacture of the material known as Kunststoffite, now extensively used for insulating purposes.
- Figure 1 is a front elevation partly in section of my improved press and Fig. 2 a section of details of the mold which I employ.
- pistons M Attached to each end of the platen G are pistons M, M only one of which is shown; these pistons reciprocate in the cylinders K, K, shown at the top of Fi 1, which cylinders are of small diameter as compared to the main cylinder I.
- Acharger- B formed to fit the cap C, is used to hold the plastic compound which is to be forced into the mold D, the capacity of the charger being several times that of the mold D, as will be hereinafter explained.
- Secured to the plate H, which is fastened to the head 0, are two links or hooks E, E, passing over ,trunnions R, R, adapted to sustain the charger B in place when the cap C is withdrawn from it.
- the cap 0 being removably secured to the piston A, chargers of various capacities may be used without making any change in the piston A, by simply substituting caps adapted to fit the charger for the ones already in use.
- the small cylinders K, K are preferably under constant pressure opposing the motion of the piston F in the cylinder I, the pistons M, M and F being all attached to the platen G, but I may also arrange valves to throw on or release the pressure in these cylinders in well-known ways.
- the Whole apparatus is preferably operated by hydraulic pressure.
- Means for controlling the hydraulic pressure are shown in the drawings and consist of the pipes T, T, &c., the pressure in which is regulated by means of valves controlled by the hand-wheels S, S'- and the handle S the pipe T communicates with the system through the cylinder I, and with the gage U, furnishing an index of the pressure. All of these parts are old and well known in the art and are used in ways well understood which form no part of my invention except in combination with other features.
- a main'cylinder containing a piston, means for regulating the pressure therein, a smaller cylinder also containing a piston opposing the motion of the piston in v the main cylinder, a platen attached to the pistons in both cylinders and a piston removably secured to the platen.
- a main cylinder contain- 1 ing a piston, means for regulating the pressure therein, a smaller cylinder also containing a piston opposing the motion of the piston in the main cylinder, a platen attached to the pistons in both cylinders, apiston secured to the platen adapted to register with a charger adapted to contain a plastic compound and a mold arranged to be filled from such charger.
- a main cylinder containing a piston, means for regulating the pressure therein, a small cylinder containing a piston opposing the motion of the piston in the main cylinder, a platen attached to the pistons in both cylinders, a piston secured thereto adapted to register with a charger, and links arranged to engage the charger upon a withdrawal of the piston therefrom.
Description
' Patented Mar. 20, 1894. v
INN
WITNESSES- I UNrr STATES ATENT Fries.
:TOSEPH HOFFMAN, OF SCHENECTADY, NEW YORK, ASSIGNOR TO THE GENERAL ELECTRIC COMPANY, OF BOSTON, MASSACHUSETTS.
PRESS FOR MOLDI NG PLASTIC COMPOUNDS.
SPECIFICATION forming part of Letters Patent No. 516,814, dated March 20, 1894.
' Application filed June 19,1893. Serial No. 478,037. (No model.)
To all whom it may concern:
Be it known that I, JosEPH HOFFMAN, a citizen of the United States, residing at Schenectady, in the county of Schenectady and State of New York, have invented a certain new and useful Improvement in Presses for Molding Plastic Compounds, of which the following is a specification.
My invention relates to presses for molding plastic compounds; and has for its obj eat to provide such a press which shall be easy of manipulation and in which the more difficult operations are accomplished by power.
My improved press is particularly adapted for use in the manufacture of the material known as liebite, now extensively used for insulating purposes.
In the accompanying drawings, which show an embodiment of my invention, Figure 1 is a front elevation partly in section of my improved press and Fig. 2 a section of details of the mold which I employ. I
In my prior Patent No. 458,754 granted September 1, 1891, I have shown a press for use in a similar manner to the one here shown; but the construction there shown has some objections which itis the purpose of the present invention to remove; that press employed one cylinder for holding the mold in place and a second cylinder for pressing the com position into the mold, while my present construction performs both of these operations with one cylinder; again, the perforated plates therein shown are difficult to remove and the cylinder was hard to handle when heated.
As shown-in the drawings 0, O, are tlie foundation plate and head respectively of a hydraulic press, L, L, are the columns supporting the press, I is the main cylinder, F is the piston sliding therein and G is the platen secured to the piston F. All of these parts are old and in common use. Upon the platen G, I secure removably apiston A, provided with a removable cap C; preferably the piston A is secured to the platen by means of an enlarged collar-Q formed upon it, over which a collar P fits and is secured to the platen G by bolts. Attached to each end of the platen G are pistons M, M only one of which is shown; these pistons reciprocate in the cylinders K, K, shown at the top of Fi 1, which cylinders are of small diameter as compared to the main cylinder I. Acharger- B, formed to fit the cap C, is used to hold the plastic compound which is to be forced into the mold D, the capacity of the charger being several times that of the mold D, as will be hereinafter explained. Secured to the plate H, which is fastened to the head 0, are two links or hooks E, E, passing over ,trunnions R, R, adapted to sustain the charger B in place when the cap C is withdrawn from it. The cap 0 being removably secured to the piston A, chargers of various capacities may be used without making any change in the piston A, by simply substituting caps adapted to fit the charger for the ones already in use. The small cylinders K, K, are preferably under constant pressure opposing the motion of the piston F in the cylinder I, the pistons M, M and F being all attached to the platen G, but I may also arrange valves to throw on or release the pressure in these cylinders in well-known ways. The Whole apparatus is preferably operated by hydraulic pressure.
Means for controlling the hydraulic pressure are shown in the drawings and consist of the pipes T, T, &c., the pressure in which is regulated by means of valves controlled by the hand-wheels S, S'- and the handle S the pipe T communicates with the system through the cylinder I, and with the gage U, furnishing an index of the pressure. All of these parts are old and well known in the art and are used in ways well understood which form no part of my invention except in combination with other features.
Its operation is as follows: A sufficient quantity of the plastic compound is inserted while hot into the charger B, which is heated to receive it; the charger is then plaeedover the cap C, the mold D placed above it, and the pressure being turned into the cylinder I, the piston F is forced up against the pressure in the cylinders K, K until the mold D abuts against the plate H; the cap C being then forced into the charger B the mold D is filled, and after the compression. ceases the pressure is thrown off the cylinder I, sufficiently to permit removing of the mold D and the substitution of another mold in its place. When the contents of the charger B have been exhausted the links E, E, are placed over the trunnions R, R, the pressure is released from the cylinder I and the pressure in the cylinders K, K, forces down the platen G, thus withdrawing the cap 0 from the charger, in which it would otherwise be stuck fast by the cementing action of the hot compound and by the great pressure in the cylinder I. The charger is then removed, heated and refilled and the operation is continued.
Having thus described my invention, what I claim as new, and wish to protect by Letters Patent of the United States, is-
1. In cotnbination,a main'cylinder containing a piston, means for regulating the pressure therein,a smaller cylinder also containing a piston opposing the motion of the piston in v the main cylinder, a platen attached to the pistons in both cylinders and a piston removably secured to the platen.
2. In combination, a main cylinder contain- 1 ing a piston, means for regulating the pressure therein, a smaller cylinder also containing a piston opposing the motion of the piston in the main cylinder, a platen attached to the pistons in both cylinders, apiston secured to the platen adapted to register with a charger adapted to contain a plastic compound and a mold arranged to be filled from such charger.
3. In combination, a main cylinder containing a piston, means for regulating the pressure therein, a small cylinder containing a piston opposing the motion of the piston in the main cylinder, a platen attached to the pistons in both cylinders, a piston secured thereto adapted to register with a charger, and links arranged to engage the charger upon a withdrawal of the piston therefrom.
In witness whereof I have hereunto set my hand this 13th day of June, 1893.
JOSEPH HOFFMAN. Witnesses:
"1. A. BRANIN, FRED BATHURST.
Publications (1)
Publication Number | Publication Date |
---|---|
US516814A true US516814A (en) | 1894-03-20 |
Family
ID=2585619
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US516814D Expired - Lifetime US516814A (en) | Press for molding plastic compounds |
Country Status (1)
Country | Link |
---|---|
US (1) | US516814A (en) |
-
0
- US US516814D patent/US516814A/en not_active Expired - Lifetime
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US516814A (en) | Press for molding plastic compounds | |
US133229A (en) | hyatt | |
US306730A (en) | Machines | |
US566207A (en) | Press for dental flasks | |
US811456A (en) | Shingle-press. | |
US671835A (en) | Hydraulic press for splicing electrical conductors. | |
US230429A (en) | Hydrostatic press | |
US407696A (en) | smith | |
US1129182A (en) | Heated press-plate for embossing. | |
US447003A (en) | Finisher-press | |
US45893A (en) | Hand-stamp | |
US571265A (en) | Apparatus for treating heated metals under pressure | |
US519773A (en) | Tile-machine | |
US978067A (en) | Hydraulic vise. | |
US699018A (en) | Apparatus for forming plates. | |
US202660A (en) | Improvement in hydraulic power-accumulators | |
US772670A (en) | Powder-press. | |
US1041540A (en) | Spring filler or cut-off for use in connection with molding machinery. | |
US3944A (en) | Henry m | |
US1657398A (en) | Rubber-molding apparatus | |
US1636962A (en) | jacobson | |
US395740A (en) | Machine for molding multitubular pipe | |
US1022361A (en) | Piano-hammer molding and gluing machine. | |
US644782A (en) | Hydraulic press for mining purposes. | |
US383591A (en) | puchta |