GB2046072A - Cheesemaking installation - Google Patents
Cheesemaking installation Download PDFInfo
- Publication number
- GB2046072A GB2046072A GB8009465A GB8009465A GB2046072A GB 2046072 A GB2046072 A GB 2046072A GB 8009465 A GB8009465 A GB 8009465A GB 8009465 A GB8009465 A GB 8009465A GB 2046072 A GB2046072 A GB 2046072A
- Authority
- GB
- United Kingdom
- Prior art keywords
- curd
- section
- whey
- conveyor
- making apparatus
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J25/00—Cheese-making
- A01J25/002—Cheese-making continuously
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01J—MANUFACTURE OF DAIRY PRODUCTS
- A01J25/00—Cheese-making
- A01J25/11—Separating whey from curds; Washing the curds
- A01J25/111—Separating whey from curds; Washing the curds by continuous separation
- A01J25/114—Separating whey from curds; Washing the curds by continuous separation on endless belts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G2201/00—Indexing codes relating to handling devices, e.g. conveyors, characterised by the type of product or load being conveyed or handled
- B65G2201/02—Articles
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Animal Husbandry (AREA)
- Environmental Sciences (AREA)
- Dairy Products (AREA)
Abstract
A cheesemaking installation comprising means 20 for forming a mat of curd from a slurry of curd and whey, a plurality of endless conveyors 21, 35, 45 and 55 for continuously moving the mat of curd in succession through a drying and de-wheying section 12, a fusing section 13, a stretching and cheddaring section 14, a milling section 15 having means 52 for cutting the curd into separate particles or pieces, a salting section 16 having means 60 for applying salt to the curd, and a mellowing section 17 permitting absorption of the salt into the curd, and means 31 for agitating the curd in the de- wheying and salting sections. Additional agitators 40 are selectively operable when the installation is used for production of granular curd, and water sprays 32 are provided for use when producing washed granular curd. The installation is completely enclosed to enable the temperature to be controlled and to prevent air-borne contamination. <IMAGE>
Description
SPECIFICATION
Cheese making method and apparatus
The present invention relates to improvements
in cheese making methods and apparatus and is
particularly (but not exclusiveiy) applicable to the
production of cheddar cheese.
Conventionally cheese making has involved a
number of different steps or stages which have
normally been carried out in different apparatus
and transported either manually or with some
mechanised aid between the apparatus stages.
The various stages include producing a slurry of cheese curd and whey from a milk supply; draining
most of the whey from the curd; fusing or matting the drained curd together and allowing a period of time for acid development in the so-called
cheddaring stage; milling or cutting the matted curd into small particles and applying salt to these particles or chips; allowing a further period of time for mellowing of the salted curd particles; and subsequently pressing the salted curd particles into a coherent mass before packing into blocks.
The quality of cheese produced by these techniques has to a very large extent depended upon the skill and experience of the cheese maker in controlling the various operating parameters and in particular in determining appropriate draining, acid development and mellowing times.
Over recent years there have been several attempts (particularly in cheddar cheese making) to mechanise the process by providing continuous or semi-continuous installations. These developments have generally involved trying to get a continuous flow through all or part of the various stages of production and have normally used different types of conveyors for conveying the curd through and between the various stages.
These systems, although providing some advantages from the point of view of improving the flow rate of material through the system, have not proved altogether satisfactory in practice.
Some of the disadvantages of these known systems are listed below.
(I) They do not provide a continuous through flow of material through all stages of the cheese making process within one machine, and in particular, a continuous through flow from the cheddaring stage through a milling operation and the subsequent salting and mellowing stages.
(II) They provide insufficient control of the variable parameters involved in cheese making and in consequence the quality of cheese produced suffers. Generally it is desirable to be able to vary the maturing or cheddaring time as well as the mellowing time in response to the acidity level of the cheese at varying times throughout its development. Generally known mechanised systems do not allow for easy testing of the acidity levels at the various critical phases of production.
(Ill) One of the major problems with both conventional and the more recent mechanised or semi-mechanised systems is the high capital expense of the installation. However, generally very little attempt has been made to restrict the floor space required for these installations and the high capital expense of the machinery is aggravated by the high capital cost of the floor space required for the installation.
(IV) Known mechanised and semi-mechanised systems have generally suffered from an inflexibility in that they are usually only capable of producing one type of cheese.
One of the main objectives of the present invention is to provide an apparatus for cheese production, capable of continuous through flow from the production of cheese curd and whey to subsequent salting and mellowing stage.
According to the present invention there is provided a cheese making apparatus comprising whey draining means for receiving a slurry of curds and whey and for draining a substantial portion of the whey therefrom, an endless conveyor system for receiving drained curd from said whey draining means and for moving the curd in succession through a drying and de-wheying section, a fusing section for forming the curd into a mat, and a cheddaring section for acid development in the curd, means for cutting the cheddared curd into separate particles or pieces, and an endless salting conveyor disposed substantially beneath the aforementioned conveyor system for receiving pieces or particles of curd from said cutting means, the salting conveyor being arranged to pass the pieces of curd through a salting section having means for applying salt to the curd and a mellowing section permitting absorption of the salt into the curd.
The apparatus of the invention is preferably provided with a plurality of trays for collecting whey drained from the curd, the trays being arranged so as to segregate whey of different acid levels drained from the different sections of the apparatus. The conveyor system preferably comprises a plurality of conveyors each provided with separate drive means which are individually adjustable to vary the speed of each conveyor, whereby the acidity level of the whey drained from each of said sections may be adjusted by varying the residence time of the curd in each of the sections.
The apparatus can then be completely enclosed in a casing to enable the temperature of the curd to be maintained at a substantially constant temperature and to avoid air-borne contamination, the speed of the conveyors and other parameters which affect the quality of the cheese being controlled in accordance with the measured acidity levels of the whey drained from the various sections.
A cheese making apparatus according to the invention for producing cheddar cheese, but which is also capable of being used for producing other forms of cheese, will now be described by way of example, with reference to the accompanying drawings, in which:
Figure 1 is a perspective view of the installation, with part of the outer casing cut away to show details of construction.
Figure 2 is a cross sectional elevation view of
the apparatus taken from the other side to that
shown in Figure 1,
Figure 3 is a plan view of the conveyor in the
whey drainage section of the apparatus showing
in broken lines the side skirts for retaining the curd
on the conveyor,
Figure 4 is a plan view of the conveyor in the
matting and fusing section, showing the side skirts in broken lines,
Figure 5 is a plan view of the conveyor in the cheddaring section, showing the side skirts in broken lines, and
Figure 6 is a plan view of the conveyor in the salting and mellowing sections, showing the side skirts in broken lines.
The cheese making apparatus shown in the drawings comprises a frame 10 fitted with an outer casing 11 which completely encloses a primary whey drainage section 12, a matting and fusing section 13, a cheddaring section 14, a milling section 15, a salting section 1 6 and a
mellowing section 1 7. The whey drainage section
12 and the matting and fusing section 13 are positioned above the cheddaring section 14 which is in turn positioned above the salting section 1 6 and mellowing section 17, so that the cheese curd flows in a cascade flow pattern from an upper input level to a lower output level.
The primary drainage section 12 has a drainage unit 20 and a drainage conveyor 21. The unit 20 consists of a reservoir 22 for reception of a slurry of curds and whey, the reservoir having a weir 23, a drainage screen 24 inclined downwardly from the weir for reception of slurry overflowing the weir, and a tray 25 for collecting whey drained from curd flowing down the screen. The curds travel by gravity downwardly over the screen while a substantial portion of the whey is drained through the screen and collected in the tray 25.
The screen 24 comprises a plurality of closely spaced parallel bars of wedged shaped cross section which defined drainage apertures having opposing walls which are flared outwardly from one another in the direction from the upper surface to the lower surface of the screen. The drainage screen is curved so that the end of the screen adjacent the weir lies at a steep angle to the horizontal and the end of the screen remote from the weir lies at a shallow angle of inclination to the horizontal. The reservoir, screen and tray from a single unit mounted for pivotal movement about a substantially horizontal axis so as to adjust the angle of inclination of the screen to the horizontal. The curd exits from the drainage screen 24 onto the drainage conveyor 21. The drainage unit 20 is the subject of our co-pending patent application No.
The drainage conveyor 21 comprises an endless slat conveyor (Figure 3) consisting of two endless drive chains 26, a plurality of thin metal slats 27 extending between and mounted on the chains, and two side skirts 28, 29 for retaining the curd on the slats, the side skirts being fixed to the frame and in sliding contact with the slats. The slats are provided with perforations for draining whey from curd on the conveyor, and a plurality of trays 30 are positioned below the conveyor to collect whey draining therefrom. Arranged above the conveyor 21 are a number of peg stirrers 31 and spray nozzles 32 between the peg stirrers 31.
The stirrers 31 each comprises a shaft extending transversely across the conveyor and rotatably
mounted in bearings on the frame 10, the shaft having radially extending pegs or arms 33 spaced at equal anguiar intervals around the shaft and arranged to engage curd on the conveyor upon rotation of the shaft. The shaft is driven by a motor (not shown). The pegs 33 may be helically arranged along the shaft.
The matting and fusing section 13 has a conveyor 35 consisting of two endless chains 36, transverse slats 37 mounted on and extending between the chains, and side skirts 38, 39 for retaining curd on the slats. The upper run of conveyor 35 is provided with peg stirrers 40 similar to peg stirrers 31 except that the pegs extend radially on only about half the periphery of the drive shaft whereby the stirrers may be parked in a non-operative position out of contact with any material on the conveyor. The conveyor 35 extends from and slightly beneath the conveyor 21 , the direction of movement of the upper runs of the conveyors 21, 35 being the same such that cheese curd (at this stage being in loose particle form) passes directly from the conveyor 21 to the conveyor 35.The length and speed of the conveyor 35 is sufficient to allow the initially particulate cheese curd to pile and fuse and mat together, when the peg stirrers 40 are in the parked non-operative position, such that at the end of conveyor 35 a substantially continuous mat of cheese curd is formed. A plurality of trays 41 are positioned below the conveyor 35 to collect whey from the curd on the conveyor, the whey draining through the gaps between the slats of the conveyor.
The cheddaring section 14 comprises a conveyor 45 (Figure 5) consisting of two endless chains 46, transverse slats 47 on the chains, and side skirts 48, 49 for retaining curd on the slats. A plurality of peg stirrers 40 having pegs on only one half of the periphery of the stirrer are spaced along the conveyor, the stirrers being positioned between the drainage trays 41 of conveyor 35 to minimise the overall height of the installation. The cheddaring conveyor 45 is arranged with its direction of movement opposite to that of the conveyor 35. A deflector plate 50 is mounted on the frame at the end of conveyor 35 and arranged to invert the mat of curd and guide it onto the upstream end of conveyor 45. A plurality of trays 51 are positioned below the conveyor 45 to collect whey from the curd on the conveyor, the whey draining through the gaps between the slats of the conveyor.
The milling section 1 5 is at the downstream end of the cheddaring conveyor 45. The milling section comprises a cutting device 52 adapted to cut the mat of cheese curd into small particles or chips ready for salting. Salt is generally absorbed more quickly when the surface area to volume of the cheese curd is relatively large and this ratio is increased by decreasing the size particle or chip.
The cutting device 52 comprises a cylindrical drum having a transverse plate adapted to cut a strip across the complete width of the cheese curd mat and shorter longitudinal blades generally perpendicular to the transverse blade adapted to cut the transverse strips into shorter "chip" lengths. Drive means are operable to oscillate the drum between a cutting position and an inoperative position generally beneath the curd mat. In the cutting position the blades strike the curd mat against a cutting block arranged above the mat. The length of travel of the oscillating blades need only be fairly short such that movement of the blade occurs generally within the lower left-hand quadrant as viewed in Figure 2.
The cheese curd cut in any one stroke of the cutting blade is generally dislodged by curd cut in a sudsequent stroke such that the curd ships fall by gravity into the salting section 16. The cutting device 52 is of known construction and has not been illustrated in detail.
The salting section 1 6 has the upstream half of a conveyor 55 which is positioned below the cheddaring conveyor 45 and adapted to move in a direction opposite to that of conveyor 45. The conveyor 55 (Fig. 6) consists of two endless chains 56, transverse slats 57 on the chains, and side skirts 58, 59 for retaining curd on the slats.
The salting section 1 6 is provided with nozzles 60 for spraying whey saturated with salt on the curd on the conveyor 55, and peg stirrers 31 operable to agitate the curd to distribute the whey/salt solution more uniformly throughout the curd. The slats 57 of the conveyor 55 are apertured to facilitate drainage of the whey/salt solution from the curd on the conveyor, and a plurality of trays 61 are positioned below the conveyor 55 to collect the whey/salt solution. This method of salting curd is described in more detail in our copending application No.
The mellowing section 1 7 comprises the downstream half of the conveyor 55. This section is provided with peg stirrers 40 having pegs on only half the periphery so that the stirrers can be parked in a non-operative position. The curd discharged from the conveyor 55 falls into a vibratory conveyor 62 from which curd can be drawn by vacuum into a tower (not shown) for consolidating the curd into a block of natural cheese as described in British patent No.
1542844.
The conveyors 21, 35, 45, 55 are each provided with a separate drive motor and gear reduction mechanism 63 adjustable to enable each conveyor to be driven at any desired speed.
The conveyors are preferably of the construction described and illustrated in our co-pending patent application No. in which each slat comprises a thin elongated metal plate having the longitudinal margins thereof bent through an angle in excess of 900 and longitudinal strengthening means in the form of a V shaped bar having the ends thereof secured to the end portions of the plate, the centre portion of the plate being supported by a strut on the centre of the bar. Conveyors having slats of this construction can provide a substantially flat upper surface but nevertheless be several metres wide and support a heavy load per unit area without the aid of additional supports between the chains.
The side skirts 28, 29 of the drainage conveyor 21 are arranged as shown in Figure 3 to effect a lateral compression of the curd as it travels along the conveyor, and the side skirts 38, 39 of the matting conveyor 35 are arranged as shown in
Figure 4 to effect a further lateral compression of the curd in the upstream portion of the conveyor, and then to permit expansion of the curd in the downstream portion of the conveyor 35. The lateral compression of the curd, in conjunction with agitation by the peg stirrers 31 assists in releasing whey from the curd, and the subsequent expansion of the curd in the downstream portion of the conveyor 35 assists in allowing the whey to filter down to the top surface of the conveyor and drain away between the slats.
As explained previously, the curd at the downstream end of the conveyor 35 has fused into a substantially continuous mat of curd, and the conveyor 45 is driven at a slightly higher speed than conveyor 35 so as to effect longitudinal stretching of the mat of curd as it is transferred from the conveyor 35 to conveyor 45.
In addition, the side skirts 48, 49 of the cheddaring conveyor 45 are arranged as shown in
Figure 5 to permit a lateral stretching of the mat of curd under its own weight. The stretching of the curd assists in the cheddaring action.
The side skirts 58, 59 of the conveyor 55 which extends through the salting and mellowing sections are parallel to one another.
As shown in Figure 1 the whey collecting tray 25 of the drainage unit 20 and the whey collecting trays 30 of the drainage conveyor 21 are connected to a separate outlet pipe 65. The whey collecting trays 41 of the conveyor 35 are connected to a separate outlet pipe 66. The trays 51 under the upstream portion of the cheddaring conveyor 45 are connected to an outlet pipe 67 and the trays under the downstream portion of the conveyor are connected to a separate outlet pipe 68. The trays 61 under the upstream portion of the conveyor 55, that is the portion extending through the salting section, are connected to an outlet pipe 69, and the trays 61 under the downstream portion of the conveyor 55, that is the portion extending through the mellowing section are connected to an outlet pipe 70.
Each of the outlet pipes 65-70 are fitted with sensors (not shown) adapted to measure the acidity level of the whey draining from the collecting trays associated with the outlet pipe.
The spray nozzles 32 on the conveyors 21, 35 are for use in spraying water or other liquid onto the curd to wash away lactic acid from the surfaces of the curd, and thereby arrest acid development in the curd.
In the manufacture of cheddar cheese with the apparatus shown in the drawings, the peg stirrers 40 on the conveyors 35, 45 are held in their inoperative positions to permit the curd particles to fuse together.
The peg stirrers 40 are operated when the apparatus is used for the manufacture of Colby or
Montery cheese and the curd has to be maintained in a granular form. The spray nozzles 32 are used to spray water onto the curd in the manufacture of cheese from washed granular curd.
Although the apparatus shown in the drawings is particular suitable for the continuous manufacture of cheese, it may be used to process curd in batches taken sequentially from a number of vats in which the curd and whey is produced.
Claims (13)
1. Cheese making apparatus comprising whey draining means for receiving a slurry of curds and whey and for draining a substantial portion of the whey therefrom, an endless conveyor system for receiving drained curd from said whey draining means and for moving the curd in succession through a drying and de-wheying section, a fusing section for forming the curd into a mat; and a cheddaring section for acid development in the curd, means for cutting the cheddared curd into separate particles or pieces, and an endless salting conveyor disposed substantially beneath the aforementioned conveyor system for receiving pieces or particles of curd from said cutting means, the salting conveyor being arranged to pass the pieces of curd through a salting section having means for applying salt to the curd and a mellowing section permitting absorption of the salt into the curd.
2. Cheese making apparatus as claimed in claim 1 including a plurality of trays for collecting whey drained from the curd, the trays being arranged so as to segregate whey drained from the curd, the trays being arranged so as to segregate whey of different acid levels drained from the different sections of the apparatus.
3. Cheese making apparatus as claimed in claim 2, wherein the conveyor system comprises a plurality of conveyors each provided with separate drive means which are individually adjustable to vary the speed of each conveyor, whereby the acidity. level of the whey drained from each of said sections may be adjusted by varying the residence time of the curd in each of the sections.
4. Cheese making apparatus as claimed in any of claims 1-3 wherein each of said sections is provided with a plurality of stirrers operable to agitate the curd on the conveyors.
5. Cheese making apparatus as claimed in claim 4, wherein at least some of said stirrers each comprises a rotatable transverse shaft and a plurality of radially extending pegs adapted to engage curd on the conveyor upon rotation of the stirrers, said pegs not extending on all sides of the shaft whereby it is possible to position the stirrer such that the pegs do not engage curd on the conveyor.
6. Cheese making apparatus as claimed in claim 4 or 5 as appendent to claim 3, wherein at least some of the conveyors are superimposed one above the other, and the peg stirrers of the lower of two superimposed conveyors are interposed between the whey collecting trays of the upper of the two conveyors to minimise the overall height of the installation.
7. Cheese making apparatus as claimed in any of claims 1-6, wherein the conveyors are provided with side skirts for retaining the curd on the conveyors, said side skirts being arranged to compress the curd laterally during passage through the drying and de-wheying section and the upstream portion of the fusing section, and then to permit expansion of the curd during passage through the downstream portion of the fusing section and through the cheddaring section.
8. Cheese making apparatus as claimed in any of claims 1-7 including means for spraying a liquid onto the curd in at least one of the dewheying and fusing sections to wash lactic acid from the surfaces of the curd.
9. Cheese making apparatus comprising whey draining means for receiving a slurry of curds and whey and for draining a substantial portion of the whey therefrom, a conveyor system for receiving drained curd from said whey draining means and for moving the curd in succession through a drying and de-wheying section, a fusing section for forming the curd into a mat, a stretching and cheddaring section, a salting section having means for applying salt to the curd, and a mellowing section permitting absorption of the salt into the curd, and cutting means disposed between the cheddaring and salting sections and operable to cut the curd into separate particles or pieces, wherein the whey draining means and said sections are enclosed in a casing to enable the curd to be maintained at a substantially constant temperature and to avoid air-borne contamination.
10. Cheese making apparatus as claimed in claim 9, including means for measuring the acidity of whey drained from at least some of said sections, and means for regulating the residence time of the curd in each section in accordance with the measured acidity level.
11. Cheese making apparatus as claimed in claim 9 or 10, wherein the conveyor system comprises a plurality of endless slat conveyors arranged to move the curd in cascade flow through said sections, the slat conveyors being fitted with stationary side skirts for retaining curd on the conveyors.
12. Cheese making apparatus as claimed in claim 11, wherein said side skirts are arranged to effect lateral compression and subsequent expansion of the curd during passage of the curd through the apparatus.
13. Cheese making apparatus constructed, arranged and adapted to operate substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8009465A GB2046072B (en) | 1979-03-23 | 1980-03-20 | Cheese making installation |
GB8010482A GB2072480A (en) | 1980-03-20 | 1980-03-28 | Method and apparatus for the salting of cheese curd |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB7910317 | 1979-03-23 | ||
AUPD816679 | 1979-03-26 | ||
GB8009465A GB2046072B (en) | 1979-03-23 | 1980-03-20 | Cheese making installation |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2046072A true GB2046072A (en) | 1980-11-12 |
GB2046072B GB2046072B (en) | 1983-08-24 |
Family
ID=27157090
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8009465A Expired GB2046072B (en) | 1979-03-23 | 1980-03-20 | Cheese making installation |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2046072B (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151896A (en) * | 1983-09-28 | 1985-07-31 | Sr Angelo Mongiello | Cheese cooking system |
DE3844147A1 (en) * | 1987-12-28 | 1989-07-06 | Damrow Co | METHOD AND DEVICE FOR CONTINUOUSLY SPREADING AND DELIVERING WHITE CHEESE |
GB2477922A (en) * | 2010-02-17 | 2011-08-24 | Andrew Martyn Lockyer | Method of cheese production using reduced size curds. |
-
1980
- 1980-03-20 GB GB8009465A patent/GB2046072B/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2151896A (en) * | 1983-09-28 | 1985-07-31 | Sr Angelo Mongiello | Cheese cooking system |
DE3844147A1 (en) * | 1987-12-28 | 1989-07-06 | Damrow Co | METHOD AND DEVICE FOR CONTINUOUSLY SPREADING AND DELIVERING WHITE CHEESE |
GB2477922A (en) * | 2010-02-17 | 2011-08-24 | Andrew Martyn Lockyer | Method of cheese production using reduced size curds. |
Also Published As
Publication number | Publication date |
---|---|
GB2046072B (en) | 1983-08-24 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |