US3830614A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Injection molding machine
Assignee: Individual
•
Filing: 1972-12-01
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Granted: 1974-08-20
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Expires: 1992-12-01
Abstract
Abstract An injection molding machine comprises a stationary support having first and second mold parts reciprocally mounted thereon to define a split mold cavity therebetween. The upper end of an actuating lever is pivotally attached to the second mold part whereas the lower end thereof is pivotally attached to a springbiased slide block. A continuously rotating crank is attached to the lever to reciprocate the second mold part relative to the first mold part during a molding cycle. The spring-biased slide block is pre-adjusted to apply a substantially uniform molding pressure to the mold parts and attendant structures upon rotation of the crank.
Inventors
- 👤 A Kurtz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:33
CPC Classifications
B; B29; B29C; B29C45/00; B29C45/17; B29C45/64; B29C45/66; B29C45/70; B29C45/706
Claims Analysis
Total Claims: 22
Claim 1
Independent Claim
122 words
An injection molding machine comprising a stationary support, and filling, heating and molding units sequentially mounted on said support, said molding units respectively comprising first and second separable mold parts, defining a split mold cavity therein between, each mounted for reciprocal movement on said support, actuating means connected to said second mold part for engaging and moving said first mold part axially, and spring means operatively connected to said actuating means for applying a substantially uniform pressure to said second mold part when it engages and moves said first mold part, said actuating means comprising a lever having its upper end pivotally mounted to said second mold part and its lower end pivotally mounted to a slide block abutting said spring means.
Claim 2
Dependent Claim
122 words
An injection molding machine comprising a stationary support, and filling, heating and molding units sequentially mounted on said support, said molding units respectively comprising first and second separable mold parts, defining a split mold cavity therein between, each mounted for reciprocal movement on said support, actuating means connected to said second mold part for engaging and moving said first mold part axially, and spring means operatively connected to said actuating means for applying a substantially uniform pressure to said second mold part when it engages and moves said first mold part, said actuating means comprising a lever having its upper end pivotally mounted to said second mold part and its lower end pivotally mounted to a slide block abutting said spring means.
Claim 3
Dependent Claim
28 words
The invention of claim 1 further comprising a second spring means positioned between said support and said filling unit to urge said filling unit towards said molding units.
Claim 4
Dependent Claim
66 words
The invention of claim 1 wherein said filling station comprises a hopper for charging said filling station with a plastic material and passage means for communicating said plastic material from said hopper to said mold cavity and further comprising plunger means for ejecting said plastic material through said passage means and into said mold cavity upon axial movement of said first and second mold parts theretowards.
Claim 5
Dependent Claim
49 words
The invention of claim 3 wherein said pluNger means is secured to said support and normally projects into said passage means to communicate said hopper with said passage means and to prevent such communication when said ejector means is operative to eject said plastic material into said mold cavity.
Claim 6
Dependent Claim
31 words
The invention of claim 3 wherein said passage means terminates at said mold cavity at an ejector nozzle mounted on said support to be normally separated from said first mold part.
Claim 7
Dependent Claim
44 words
The invention of claim 3 wherein said heating unit comprises electrical heating coils circumferentially mounted about a portion of said passage means, adjacent to said filling unit, for heating said plastic material to a liquid state prior to its injection into said mold cavity.
Claim 8
Dependent Claim
27 words
The invention of claim 1 wherein said support comprises a pair of longitudinally extending and parallel guide bars slidably mounting said filling, heating and molding units thereon.
Claim 9
Dependent Claim
45 words
The invention of claim 7 further comprising stop means mounted on said guide bars for limiting the axial movement of said filling and heating units towards said molding units and for limiting the axial movement of said first mold part towards said second mold part.
Claim 10
Dependent Claim
33 words
The invention of claim 1 further comprising adjustment means for selectively compressing said spring against said slide block to adjust the pressure applied to said first mold part by said second mold part.
Claim 11
Dependent Claim
23 words
The invention of claim 1 wherein said actuating means further comprises a motor-driven crank operatively connected to said lever, between the ends thereof.
Claim 12
Dependent Claim
21 words
The invention of claim 10 wherein said actuating means further comprises a link pivotally attached between said lever and said bellcrank.
Claim 13
Dependent Claim
80 words
In an injection molding machine comprising separable first and second mold parts, defining a split mold cavity therebetween, and actuating means, including a lever, operatively connected to said second mold part for axially engaging and moving said first mold part with said second mold part, the invention comprising spring means operatively connected to the lever of said actuating means for applying a substantially uniform pressure to said second mold part when it axially engages and moves said first mold part.
Claim 14
Dependent Claim
80 words
In an injection molding machine comprising separable first and second mold parts, defining a split mold cavity therebetween, and actuating means, including a lever, operatively connected to said second mold part for axially engaging and moving said first mold part with said second mold part, the invention comprising spring means operatively connected to the lever of said actuating means for applying a substantially uniform pressure to said second mold part when it axially engages and moves said first mold part.
Claim 15
Dependent Claim
22 words
The invention of claim 12 further comprising second spring means positioned to urge said first mold part towards said second mold part.
Claim 16
Dependent Claim
32 words
The invention of claim 12 further comprising plunger means for ejecting a plastic material into said mold cavity upon axial movement of said first and second mold parts towards said plunger means.
Claim 17
Dependent Claim
32 words
The invention of claim 14 further comprising heating means positioned adjacent to said plunger means for heating said plastic material to a liquid state prior to its injection into said mold cavity.
Claim 18
Dependent Claim
24 words
The invention of claim 12 further comprising stop means for limiting the axial movement of said first mold part towards said second mold part.
Claim 19
Dependent Claim
37 words
The invention of claim 12 wherein the lever of said actuating means has its upper end pivotally mounted to said second mold part and its lower end pivotally mounted to a slide block abutting said spring means.
Claim 20
Dependent Claim
33 words
The invention of claim 17 further comprising adjustment means for selectively compressing said spring against said slide block to adjust the pressure applied to said first mold part by said second mold part.
Claim 21
Dependent Claim
23 words
The invention of claim 17 wherein said actuating means further comprises a motor-driven crank operatively connected to said lever, between the ends thereof.
Claim 22
Dependent Claim
21 words
The invention of claim 19 wherein said actuating means further comprises a link pivotally attached between said lever and said crank.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-08-19 | 1978-02-18 | 1978-08-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-08-19 | 1982-02-18 | 1982-08-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-08-19 | 1986-02-18 | 1986-08-20 | $7700.00 | Window Closed / Lapsed |