1. A golf ball mold frame, comprising
a lower plate containing multiple annular recesses for holding mold cavities, each recess having at least two locator pins arranged on a rim for inserting into corresponding locator slots of a mold cavity; the two locator pins being arranged symmetrically about an axis intersecting the center of the annular recesses; and
an upper plate containing multiple annular recesses for holding mold cavities, each recess having at least one locator pin arranged on a rim for inserting into at least one corresponding locator slot of a mold cavity; the at least one locator pin being positioned on the same axis where the two locator pins in the lower frame plate are positioned, the upper plate and lower plate including a fastening means so that when the lower and upper mold frames are brought into contact with each other, the mold cavities in the lower frame are mated to the mold frames in the upper frame under compressive force.
2. The frame of claim 1, wherein the lower and upper frame plates are substantially square-shaped and each plate contains four annular recesses for receiving four mold cavities.
3. The frame of claim 1, wherein each annular recess in the lower frame has two locator pins arranged on its rim and each annular recess in the upper mold frame has a single locator pin arranged on its rim.
4. The frame of claim 3, wherein the two locator pins are positioned symmetrically about a first axis that intersects the center of the annular recesses in the lower frame plate, and the single locator pin is positioned on a second axis that intersects the annular recesses in the upper frame plate, the first and second axes being identical.
5. The frame of claim 4, wherein the two locator pins have the same diameter, each pin having a diameter of \u22660.125 inches.
6. The frame of claim 5, wherein the relationship of the diameter of the two locator pins (dp) and diameter of the single locator pin (Dp) is defined according to the following relationship:
dp<Dp\u22661.25dp
7. The frame of claim 4, wherein the two locator pins are separated by a separation angle in the range of about 10 to about 45 degrees.
8. The frame of claim 1, wherein each mold frame plate contains two cut-out cavity hold areas for placing retaining means to secure the mold cavities in place, the cut-out areas being located on an axis extending through the center of each frame plate.
9. The frame of claim 8, wherein the position of a locator pin to an adjacent cavity hold area is defined by a proximity angle of less than 75 degrees.
10. The frame of claim 1, wherein a retainer washer is positioned between the lower and upper frame plates to secure the mold cavities in place as the plates are pressed together.
11. The frame of claim 1, wherein the lower plate has at least one alignment hole for receiving a guide pin and the upper plate has at least one guide pin for inserting into the at least one alignment hole when the lower and upper frame frames are brought into contact with each other.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. Method for assembling decreasing section concrete towers for wind turbines which comprises:
a pre-assembly phase of concrete tower sections,
wherein the tower comprises at least two stackable annular sections, a first stackable annular section and a second stackable annular section with a greater section than the first stackable annular section, wherein the stackable annular sections comprise in turn at least two precast concrete segments and,
wherein the pre-assembly phase is carried out in at least one pre-assembly zone near to the base of the tower and comprises stages of joining the at least two precast concrete segments of a stackable annular section carried out for at least the first stackable annular section and the second stackable annular section, and
wherein during the pre-assembly phase the at least two precast concrete segments of the first stackable annular section are confined at least partially within the inner space defined by the at least two precast concrete segments of the second stackable annular section.
2. The method decreasing of claim 1 wherein the stage of joining the at least two precast concrete segments of a stackable annular section carried out for at least the first stackable annular section and the second stackable annular section are provisional joining stages carried out using provisional joining means used during part or the entire method for assembling decreasing section concrete towers.
3. The method of claim 1 wherein the stages of joining the at least two precast concrete segments of a stackable annular section carried out for at least the first stackable annular section and the second stackable annular section are definitive joining stages carried out using definitive joining means so that the tower once assembled withstands the loads of the wind turbine during its operation.
4. The method of claim 1, wherein the stage of joining the at least two precast concrete segments of the first stackable annular section is carried out before the stage of joining the at least two precast concrete segments of the second stackable annular section.
5. The method of claim 1, wherein the pre-assembly phase comprises, previously to the phases of joining the at least two precast concrete segments of each of the stackable annular sections, a positioning stage of the precast concrete segments which comprises disposing the at least two precast concrete segments of each of the stackable annular sections vertically in an adjacent manner, in such a way that the joining flanges between them are disposed adjacent to each other.
6. The Method of claim 1, wherein the pre-assembly phase comprises, previously to the phases of joining the at least two precast concrete segments of each of the stackable annular sections, a positioning stage of the precast concrete segments which comprises disposing the at least two precast concrete segments of each of the stackable annular sections vertically opposite each other, the at least two precast concrete segments of each of the stackable annular sections being not adjacent.
7. The method of claim 5, wherein the positioning stage of the precast concrete segments of the first stackable annular section is carried out with respect to one of the pre-assembly zones and the positioning stage of the precast concrete segments of the second stackable annular section is carried out with respect to the first stackable annular section.
8. The method of claim 7, wherein the positioning stage of the precast concrete segments of the first stackable annular section with respect to the pre-assembly zone is carried out by means of struts to position and support each precast concrete segment, and the positioning stage of the precast concrete segments of the second stackable annular section with respect to the first stackable annular section is carried out by means of support elements.
9. The method of claim 8, wherein the positioning stage of the precast concrete segments of the second stackable annular section with respect to the first stackable annular section is carried out either by pre-assembling the support element on the first stackable annular section, or by pre-assembling the support element on the second stackable annular section.
10. The method of claim 1, wherein the tower comprises also a third stackable annular section whose section is greater than the section of the first stackable annular section and smaller than the section of the second stackable annular section, and which in turn comprises at least two precast concrete segments, characterised in that the pre-assembly phase comprises stages of joining the at least two precast concrete segments of the third stackable annular section, wherein the pre-assembly phase of the first stackable annular section and the second stackable annular section is carried out in a first pre-assembly zone near to the base of the tower and wherein the pre-assembly phase of the third stackable annular section is carried out in a second pre-assembly zone near to the base of the tower.
11. The method of claim 1 further comprising a phase of stacking of a stackable annular section on a stackable annular section immediately below.
12. The method of claim 11 wherein the tower comprises also a third stackable annular section whose section is greater than the section of the first stackable annular section and smaller than the section of the second stackable annular section, and which in turn comprises at least two precast concrete segments, characterised in that the pre-assembly phase comprises stages of joining the at least two precast concrete segments of the third stackable annular section, wherein the pre-assembly phase of the first stackable annular section and the second stackable annular section is carried out in a first pre-assembly zone near to the base of the tower and wherein the pre-assembly phase of the third stackable annular section is carried out in a second pre-assembly zone near to the base of the tower and wherein in the stacking phase the second stackable annular section is stacked on the base of the tower, next the third stackable annular section is stacked on the second stackable annular section and then the first stackable annular section is stacked on the third stackable annular section.
13. The method of claim 1 wherein in the pre-assembly phase is used a pre-assembly platform disposed in one of the pre-assembly zones for each of the stackable annular sections, wherein on each pre-assembly platform the precast concrete segments of a stackable annular section are disposed.
14. The method of claim 1 wherein the pre-assembly phase of the at least two stackable annular sections is carried out concentrically in such a way that the longitudinal axes of the stackable annular sections coincide.
15. The method of claim 14 wherein in the pre-assembly phase is used a pre-assembly platform disposed in one of the pre-assembly zones for each of the stackable annular sections wherein on each pre-assembly platform the precast concrete segments of a stackable annular section are disposed and wherein the pre-assembly platforms disposed in each of the pre-assembly zones are disposed concentrically.
16. The method of claim 13 wherein the pre-assembly platforms are disposed at different heights.
17. The method of claim 16 wherein the pre-assembly platform of an outer-stackable annular section is disposed at a greater height than the pre-assembly platform of the nearest stackable annular section confined within the inner space of the outer stackable annular section.
18. The method of claim 2 wherein the pre-assembly phase comprises, previously to the phases of joining the at least two precast concrete segments of each of the stackable annular sections, a positioning stage of the precast concrete segments which comprises disposing the at least two precast concrete segments of each of the stackable annular sections vertically opposite each other, the at least two precast concrete segments of each of the stackable annular sections being not adjacent.
19. The method of claim 3 wherein the pre-assembly phase comprises, previously to the phases of joining the at least two precast concrete segments of each of the stackable annular sections, a positioning stage of the precast concrete segments which comprises disposing the at least two precast concrete segments of each of the stackable annular sections vertically opposite each other, the at least two precast concrete segments of each of the stackable annular sections being not adjacent.
20. The method of claim 4 wherein the pre-assembly phase comprises, previously to the phases of joining the at least two precast concrete segments of each of the stackable annular sections, a positioning stage of the precast concrete segments which comprises disposing the at least two precast concrete segments of each of the stackable annular sections vertically opposite each other, the at least two precast concrete segments of each of the stackable annular sections being not adjacent.