MXPA00002607A - Injection mold apparatus for producing a pattern and method of mold use - Google Patents

Abstract

An injection mold (10) for forming a pattern (P) for use in investment casting having mold sections (12, 13) carrying two pattern-forming surfaces (18, 19) and a translatable third pattern-forming element (21) movable on a mold section (16). The mold also includes an inner core (23). Parting lines (36, 37) are located at inconspicuous locations by sizing and shaping the mold sections. The method of use of the injection mold includes employing an arrangement for facilitating lower mold section (13) and for raising the inner core to facilitate its removal.

Description

MOLDING APPARATUS BY INJECTION TO PRODUCE A PATTERN AND METHOD OF USE OF THE MOLD This TS request a continuation in part of an application filed on July 10 d? 1997, entitled "Injection Mold to Produce a Pattern and Method of Use of the Mold?", Serial No. 08 / 891,435, which in turn was a continuation d? the Request d? E.U.A. No. d? Seri? 08 / 662,900, filed? L 12 d? June d? 1996 of the same title.

Background d? The Invention The molds d? Aluminum to make wax patterns have been used durant? years. The molds d? combination of aluminum and? poxi also ST have used. The parts d? mold d? ? Poxi have the disadvantage of wearing down after d? repeated use and easily damaged during the handling required to carry out the operations d? molding r? petidas. Additional? ,. It is well known that molds d? aluminum have superior heat transfer in relation to the poxy molds, reducing d? this way the dwell time for the production of wax pattern and the total cycle time. When the molded parts have included an intricate interior cavity, a plurality of sections and cores d? mold. The parts and cores d? mold require d? management to achieve the armed and disarmed. Additionally, in the molding of demanding configurations such as golf club heads, the dividing lines have presented problems that require trimming and reworking of wax patterns. Previous wax patterns for making golf club heads are described in U.S. Pat. Nos. 5,204,046 and 5,417,559.

SUMMARY OF THE INVENTION In summary, the present invention comprises a multi-section mold including an internal core d? .haz whose mold? Novelty is configured and provided to facilitate handling during the molding operation. The manipulation of the mold by hand is limited to sliding and transferring the mold sections and the removal and replacement of the core d? make. Preferably, the mold is connected to and operated with a press d? mold including a work station and a preparation station towards which a lower mold portion is slidably mounted? with the inner beam core in place and the upper mold section was made descend against the STCCÍÓ? lower. After the injection of wax and cooling, the upper section is raised, the lower section ST moves slidably outside the station d? work to the preparation station and a third portion d? ST mold moves in its open position. Finally, the ST beam core separates. As a particularity, it is contemplated that, as the lower section moves out of the work station, the core along with the wax pattern can automatically rise to facilitate the removal of pattern and core. The mold? It is made of aluminum.

Brief description d? The Drawings Figure 1 TS a side elevational view of the upper lower portions of mold? assembled with a separable number beam; Figure 2 TS a perspective view of the separated upper and lower portions, with the separated core bundle; Figure 3 is a perspective view of the lower portion of mold? showing the cavity d? lower mold and third mold portion slidable in its closed position; Figure 3A is a view similar to Figure 3, with the third portion of mold? open by sliding; Figure 4 is a perspective view of the upper mold portion; Figure 5 is a plan view of the pattern mold with dividing lines and with the bundle of cores therein and with the pattern d? wax, not shown, surrounding the beam d? core: Figure 6 TS a view of the front elevation of the pattern mold including dividing lines with the wax pattern not shown; Figure 7 is an expanded perspective view of the core beam and the ring d? mounting; Figure 8 is a front elevational view of the press and mold apparatus, with the lower mold in its injection position; and Figure 9 TS a view similar to Figure 8, with the mold? lower in your station d? assembly preparation; Figure 10 is a front elevational perspective view of an alternative embodiment of the mold apparatus of the invention, including the upper mold, the lower mold and the lower mold guide path; Figure 11 is a side elevational view. partially broken, showing the assembled apparatus and one of the grooved track rails; Figure 12 is a view similar to Figure 11, in which the upper mold has been lifted and the lower mold has moved partially along the track; Figure 12a is an enlarged side elevational view of rail d? via d? Figure 12; Figure 13 is a top view of the lower mold; Figure 14 is a bottom view of the mold? Figure 15 TS a bottom view of the upper mold Figure 16 is a side view of the lower mold Figure 17 is a perspective view of the beam station d? portable core with vertical pins; Figure 18 is a perspective view of the station with the beam mounted thereon; Figure 19 TS a perspective view of the station with the beam mounted thereon and the lever operated to lower the central core unit; Figure 20 is a perspective view of the central core unit; and Figure 20a is a side elevational view of the unit d? central core including a boss groove with the lever pin in engagement with the boss groove.

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the Figures, the pattern forming mold unit 10 functions to mold a molded pattern P of wax having an outer surface lie and an interior surface lli (see Figure 5), whose pattern P is used in inversion melting of a metallic part such as a head portion d? golf club see Figures 1, 5 and 6). The mold 10 includes four (4) pattern setting determination portions that create the mold cavity C: The first portion is the portion 12 d? upper mold; the second is the 13th portion? mold? lower; and the third is a 16 d portion? Sliding mold mounted for sliding movement? horizontal in the lower portion 13 and the fourth portion is the core bundle 23 (see Figures 1, 3, 3A and 4). The upper mold portion 12 includes the cavity surface 18 defining the upper rain surface of the molded pattern P (not shown) (see Figure 5). The lower mold portion 13 includes a surface 19 d? cavity defining a portion 111 of the bottom surface of the molded pattern P. Finally, the face surface 21 of the slidable mold portion 16 defines the remainder of the outer surface of the pattern P. The face surface 21 includes the frames 21g for forming d? groove. The mold 10 also includes a beam 23 d? core that is composed of six (6) sections 26a-f d? core with section 26f d? core which is the central core section (see Figure 5), Each core section 26a-f has receivers 27a-f respectively (Figure 1). The core beam 23 is placed in the mounting ring 29 having holes 31a-f to receive the pins 2? A-f. Fixed to the ring 29 and extending therefrom is a locating projection 32 which ST fits towards the recess 33 of the mold groove. to place? l beam 23 of nucleus. Referring now to Figures 2, 3 and 4, the size and configuration of the pattern P ST defines by the surface 18 of the upper mold portion cavity, the lower mold portion cavity surface 19 and the face surface 21 the slidable mold portion 16. The dividing lines created by matching the cavities 18, 19 and the surface 21 d? face are dividing lines of crown periphery 36 (see Figure 5) and dividing line 37 d? load periphery (see Figure 6). These dividing lines 36, 37 are placed in the pattern P so that they are inconspicuous and, therefore, little or no new work of the molded pattern P is necessary to ensure that the mold product made using the pattern P has no imperfections. conspicuous Likewise, the wax injection gate 20 is shown. Returning to Figures 8 and 9, the mold 10, -the portions 12 and 13 are placed for use in a press 40 d? mold? having reciprocating plate 42 which can be moved up and down. The 12th portion of mold? The upper part is fixed to the plate 42. Under the plate 42 of the cyclo, the base 41 d? The press supports the lower mold portion 13 shown resting in its injection position in Figure 8 and in its assembled position in Figure 9). The lower mold portion 13 is mounted on the guide rails (not shown) for ease of horizontal translation on the base 42 from its injection station (IS) to its assembly preparation station (PS). In the operation of the mold press 40, the lower mold portion 13 is translated horizontally by an operator to the preparation station (PS), where the portion 16 d? d? slizable mold moves away from mold surface 19 ?. The bundle of cores 23 are placed in the mounting ring 29, whose ring 29 is assembled and placed by insertion of the projection 32 in the recess 33 in the lower mold portion 13. Next, the slidable mold portion 16 moves to its injection position. The lower mold portion 13 is transferred to its station (IS) d? injection. The reciprocal plate 41 carrying the upper mold portion 12 ST then descends to engage with the mold portion 13? lower. The alignment pins 24, 25 on the upper portion 12 enter the alignment holes 34, 35 of the lower portion 13. The pin hole core pin (not shown) is inserted into the cavity C to form the tang opening 38 (Figure 4). ST exerts pressure to retighten the mold portions 12, 13 together as the wax is injected into the pattern forming cavity C. After an appropriate cooling period for the wax to solidify, the pin d? spike core ST retracts and then the reciprocal plate 41 carrying the upper mold portion 12 rises and the portion 13 d? lower mold ST moves from the injection station (IS) to the preparation station (PS). As the lower mold section retracts towards the operator, the beam d? core automatically moves up approximately 12.7 millimeters by half d? a wedge or cam device not shown, thereby improving the ease of core beam disassembly. The slide 16 moves in alignment of both the beam 34 and the pattern P. The ring 29 d? assembly including pattern P ST then held by the operator, lifted out of mold 13 and placed in a frame (not shown). A second mounting ring and core bundle unit ST placed in the lower mold portion 13, the mold portion 16 moves towards the molding position, the lower mold portion 13 moves back to its station (IS) of injection and the press mold 40 is ready for the next cycle. The operator holds the wax pattern in one hand and lifts the beam pieces 26a-f d? core, then the beam 23 d? The core is assembled again for use in the next injection cycle. A piece of identification with a mark on it can be placed in the cavity C d? mold causing corresponding marks to appear in "the wax pattern P. Returning to Figures 10 to 12, the mold press apparatus 50 operates to place the mold sections described above for injection, for disassembly and re-assembly, whose mold press apparatus 50 has a vertically reciprocal top plate 51 to which the upper mold section 52 with nose section 52a is fixed.The mold press apparatus 50 includes a lower mold section 53 which is reciprocal in the guide track 55 once it is separated from its upper mold section 52 from an injection position to a retracted position for disassembly and assembly The movement of the lower mold section 53 in housing d? its section 52 'of upper mold, as guided by track 55, is limited by the piece 65 from top. The pin pin 58, which extends during the operation to and occupies the opening 54 (FIG. ) to create a cylindrical hollow in the pattern that ST is forming, is attached to a double-acting air-cylinder-piston unit 67, the cylinder-piston unit 67 is mounted on the plate 51. Track 55 includes the kidney 56 left of spaced guide and rail 57 right (as seen in Figure 10) with each rail 56, 57 including forward guide grooves 68a, 68b d? the upper guide grooves 69a, 69b, forward of the lower guide grooves 71a, 71b and the spring-loaded ramp 56a (Figure 12a). The spring-loaded ramp 56a having a groove 79a TS oscillatable in the rail cavity 71a. Cross bar 59 of section d? mold? bottom is positioned in the opening 62 of the lower mold section 53 (Figure 16) has a cross bar 59 with the right pin end 60 and the left pin end 61 (not shown) whose ends 60, 61 mount in the guide grooves 68a, 68b and 71a, 71b (Figure 12a). Turning to Figure 12a, the bar bolt end 60 mounts in the path indicated by the arrows a during movement of the lower mold 53 towards the stop piece 65 in the guide groove 68a until it enters the groove 79a of the ramp 56a causing the bolt end 60 to be raised towards the upper guide groove 69a and as it continues forward to pass into the guide groove recess areas 87a, 87b. The bolt end 60, under the spring drive, then falls towards the lower return groove 71a. As the bolt end 60 engages the lower ramp surface 56s of the ramp 56a during said return, it raises the ramp 56a and continues rearwardly through the slot 68a. Returning additional? Nt? to Figure 16, the opening 62 d? lower mold section houses plate 63 d? support mounting up and down on vertical rods 64a and 64b (not shown). The springs 65a, 65b urge the plate 63 downwards. The plate 63 engages and causes the upward movement of the central core unit 88 during the removal of the lower mold section 53 to its disassembly / assembly station adjacent to the part 65 d? stop and simultaneously cut the injection sprue. The plate 53 is raised by the bar bolt ends 60, 61 running in the guide grooves as. is described above. The rise and fall of plate 63 under the action d? the cross bar 59 with its ends 60, 61 is achieved by the inclined groove system of Figure 12a serving the end 60 d? bolt and a similar groove system on the rail 56 serving the bolt end 61, all as explained above. Turning now to Figures 13-16, the lower mold section 53 includes the portion 53s d? vertical mounting of the air cylinder, a section 70 of sliding mold that mounts in the sliding cavity 70p that dies? the face 70f and the core 73. When the upper mold section 53 is raised, its projection section 52a releases the sliding mold section 70 allowing it to move ST away from the pattern (P) under the force of an element d? spring (not shown). The lower mold section 53 further includes the lower surface 74 with a plurality of air outlet holes 76 (or other fluid) disposed in rows 77a- ?. the air outlet holes 74 can be arranged. in rows or in any other design. The air outlet holes 76 are connected to an air distributor (not shown). When the core 73 is placed in the section 13 mold? lower, six 86) rare earth magnets 98 (Figure 13), aligned with the core pins 95a-f magnetically attract the pins 95a-f by ensuring that the pins 95a-f are properly seated in section 53 of mold? lower against plate 63 (Figure 16). In Figures 17 and 18, a portable core beam handling device 82, normally placed on the surface S of the mold apparatus 50 (Figure 10) includes the body 83 with the front panel 83f and the upper surface 83t. the vertical pins 85 are mounted on the suprfici? 83t upper and an opening 83o is found in the upper surface 83t to receive the central core projection 86 of the central core unit 88 (see Figure 20). The device 82 has a crank 81 pivoted in the pin 80 in the front pan 83l. The crank 82 carries the projecting cam pin 78 which ST projects through the front face slot 75 towards the slot 86s d? outgoing. The pattern (P) is placed on the core beam 73. The core 73 includes the central core unit 88 which in turn also includes the ring body 89 and the central core 91. The body 89 d? ring includes holes 90 to receive pins 95a-f of sections 94a-c d? core (see Figures 28, 29 and also Figures 5 and 7). In the operation of the mold apparatus 50 and the associated portable device 83, during the injection of the wax or other molding material towards the mold sections 52, 53 coupled through the sprue hole (not shown) together with the core pin 58 in place, the pin 58 is removed and the upper stage 51 with its fixed mold section 52, after an appropriate time delay, is raised. Preferably, this step of the mold apparatus 50 and the subsequent steps are automatically operated in a computer programmed control sequence. As the upper mold section ST moves up and away from the lower mold sliding section 70, the mold sliding section 70 is free under the drive d? spring to move away from the molded pattern (P). Next, the operator holds the handle 53h and at the same time opens the valve 53v d? handle d? air (Figure 10) causing the air to flow out d? the lower holes 76 of the mold? lower providing a cushion of air between the lower surface 74 of lower mold and the surface (S) of the table d? press. The lower mold section 53 then easily pulls on the air cushion by the operator in the D direction (Figure 10). as section 53 of mold? lower ST moves towards the stop part 65, the lower mold plate 63 is raised due to the camming action of the cross bar 59 with its bolt ends 60, 61, as the bolt ends 60, 61 act upwardly in the guide slots 68, 68b, 69a, 69b and 71, 71b causing the unit 88 d? ST eleve core (Figure 12a). The sprue (not shown) ST cuts as the core unit rises. When the bolt ends 60, 61 reach the ends of the grooves 69a, 69b fall downwardly through the recesses 87a, 87b under the action of the spring loaded plate 63. The bolt ends 60, 61 are then free to move beneath the slots 71a, 7b as the mold section 53 is pushed by the operator back into position to coincide with the upper mold 52. The core unit 88, which ST has lifted by plate 63, is then easily held by the operator for removal. as the ring unit 88 is removed, the injection sprue is cut off. Lubricant or cold air can be sprayed on the pin pin 58 to reduce adhesion. The operator then places the wax pattern (P) with the inner core beam 73 on the device 82 d? core beam assembly. The central core 88 is extracted by operation d? the handle 81. The projection pin 78 of the handle 81 engages the slot 86s of the projection 86 to cause the projection 86 to move downwardly as the crank 81 is pushed downward. As the projection 86 is lowered by the crank action, the ring holes 90 accommodate the vertical pins 85 allowing downward movement until the central ring beam 89 sits on the upper surface 83f of the device. The core core 88 is thus separated from the pattern (P) without the operator holding it. the pattern (P) that could cause its deformation. The remaining core sections are then easily removed by hand and placed on a pedestal for assembly.

Claims (18)

1. CLAIMS 1. - A mold by injection to form a pattern having an outer surface and a lower surface, whose pattern is useful in investment molding, comprising: (a) a plurality d? mold sections assembled to mold the pattern and disassembled to release the pattern; He armed d? said sections forming dividing lines; (b) the mold sections carrying a plurality of pattern forming mold elements to form the outer surface of the pattern, whose mold surface elements include i) a first element having a first pattern forming surface on a section d? mold in it; ii) a second element that has a second surface d? pattern formation on a mold section therein; and iii) a third movable pattern forming element movable along a mold section; (c) an internal core to define the interior surface of the pattern d? mold; and (d) sections d? mold being dimensioned and configured so that the dividing lines are placed on the mold pattern to place the dividing line imperfections in the mold pattern in the less conspicuous locations, 2.- The injection mold d? according to claim 1, wherein the pattern is cast is used to make a head d? type of wooden stick d? golf whose pattern has a periphery d? crown of head and a periphery of face and in the one dividing line is on the periphery of crown of the head of pattern and another dividing line is on the periphery of face of the head d? Pattern. 3.- The injection mold d? according to claim 1, wherein a section d? mold? TS one upper section and another section is a lower section and the inner core is in the lower section and includes a bundle of cores. 4.- the mold? d? injection according to claim 3, wherein the beam d? cores is mounted on a ring and protruding device insertable towards a section d? mold. 5. The injection mold according to claim 1, wherein? the mold sections are made of aluminum. 6. An injection mold according to claim 3, wherein the ring and protrusion devices are mounted for vertical reciprocal movement in the lower mold section. 7.- A mold press arrangement? to support and move a pattern mold what? has an upper and a lower mold portion, including a core bundle unit, comprising: (a) a vertically reciprocable stage member that will hold the mold portion? higher; (b) an element d? base on which TS transfers the lower mold portion from an injection station to a preparation station; and (c) an element d? lifting beam unit d? core placed on the base element to raise the unit d? do when it is in your preparation station. 8. - The mold press arrangement according to claim 7, wherein the lower mold portion includes a slidable element, capable of sliding to an open position to aid in beam removal d? core from d? the portion d? lower mold. 9.- An apparatus to form a mold pattern qu? comprises: a. a upper mold section; b. a lower mold section that can move along a surface; c. a core bundle placed in the lower mold section; and d. a guide track element for guiding the lower mold section during transport from a molding position to a remote position for removal of the core bundle. 10.- The device d? according to claim 9, which further has a first cam element in track element and a second element d? Cam T? the lower mold section, whose cam element causes the core bundle to move upwards when the section d? Lower mold ST moves along the track element. 11. - The apparatus according to claim 9, which further has an expulsion element d? fluid to create fluid d? supply between section d? Lower mold and surface. 12. The apparatus according to claim 9, further having a central core in the beam core and a device for receiving the beam core with a pattern thereon and for separating the core number from the core of the beam core. make. 13.- The device d? according to claim 9, wherein the section d? Lower mold includes a magnet element to attract? l beam d? core towards the lower mold section. 14. A method for molding a pattern using a multi-section mold, including a top mold section, a section d? mold? bottom with a sliding piece and a core bundle a. provide an upper section for vertical reciprocal movement; b. place section d? Lower mold that includes the sliding piece and the core bundle on a horizontal control surface for translation movement; c. providing a lower mold section movable from a first position below the upper mold section to a second position d? assembly; d. provide a fluid cushion under d? the lower mold section during the translation; and. moving the lower mold section underneath and then coupling it with the upper mold section; F. inject material into the mold; g. then move the lower mold section over the surface d? horizontal control to its second position after raising the upper mold section; h. remove the core beam; and i. place? l beam d? core in a central core separation device. 15. The method according to claim 14 ', which also has the steps d? : to. providing a track element for controlling and guiding the lower mold section during said translation; b. provide a guiding element in the track element; and c. providing a cam member in the lower mold section that mounts on the guide element for lifting the core bundle. 16.- The method d? according to claim 14, further having the steps of; to. a core beam that has a unit d? Central core; b. provide a means for mounting the core bundle; and c. provide an element for separating the core number unit from the core beam. 17.- The method d? according to claim 14, further having a sprue formed in the pattern and providing a means for cutting the sprue when the transferable lower mold section ST moves from its first molding position to a second assembling position, 18.- The method according to claim 147 further providing a magnet in the lower mold section to bring the core beam to the lower mold section.