Wax injection machine capable of accurately forming patterns

Abstract

The invention discloses a wax injection machine capable of accurately forming patterns, and relates to the technical field of wax injection machines. The wax injection machine capable of accurately forming the pattern comprises a machine body and a wax injection mold arranged on the machine body, and further comprises an injection nozzle assembly, and the injection nozzle assembly is located above the wax injection mold and injects wax into the wax injection mold; a center hole is formed in the center area of the upper portion of the wax injection mold, side inclined holes are formed in the two sides of the upper portion of the wax injection mold, and the side inclined holes are located in the center area between the center hole and the mold edge. The injection nozzle assembly comprises a middle injection nozzle and a side injection nozzle, the middle injection nozzle and the side injection nozzle can inject wax into the wax injection mold at the same time so as to enlarge the wax injection area, and according to the wax injection machine accurate in pattern forming, due to the fact that the mold is provided with the three injection holes and is provided with the three corresponding nozzles, the injection efficiency is improved, and the production cost is reduced. And the purposes of multi-point wax injection and rapid wax injection can be achieved.

Description

Technical Field

[0001] The invention relates to the technical field of wax injection machines, in particular to a wax injection machine with accurate pattern forming. Background Art

[0002] ‌Wax injection machine is a kind of equipment used for wax molding of small and medium-sized complex, high-quality, high-precision precision castings. ‌It is also called wax injection machine or wax injection machine, which plays an important role in the precision casting production line.

[0003] The wax injection machine in the prior art usually uses the side injection method to inject wax. This is because the side injection port allows the wax liquid to flow into the mold in a more natural way, reducing flow resistance. When the wax liquid is injected from the side, it can better utilize gravity and flow characteristics to promote the uniform distribution of the wax liquid.

[0004] For large-volume molds, the industry generally adopts a multi-nozzle method for side-shooting, that is, at least two symmetrical half holes are opened on the upper and lower molds. When the molds are closed, the two opposite half holes form a whole hole. The two whole holes are symmetrical, and two nozzles are inserted into the corresponding whole holes respectively, and wax is injected at the same time; this method can effectively speed up the filling speed and reduce the filling time, but for large-volume molds, especially pattern wax molds weighing more than 10kg (such as Buddha statues), the range is long, and the sprayed wax liquid will collide, resulting in atomization, affecting the filling stability inside the mold; in addition, this side-shooting method will also cause a large distance between the injection point and the farthest point that can be injected, resulting in the initial wax injection (when the wax liquid level has not exceeded the height of the nozzle), the wax liquid after injection needs to flow over a large area to maintain the wax liquid level in the mold cavity stable, resulting in extended filling time.

[0005] In fact, for large-volume molds (especially pattern wax molds weighing more than 10kg), the top wax injection port can also be used. The top wax injection port can help the wax liquid quickly fill the entire mold, reduce the filling time, and effectively fill the entire mold.

[0006] However, the top method also has certain defects, that is, it is not convenient to install multiple sets of nozzles, and the wax liquid is ejected vertically downward, resulting in uneven wax flow. Especially when the mold shape is complex, insufficient filling may cause unclear patterns. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides a wax injection machine with accurate pattern molding, which solves the problem that it is inconvenient to install multiple sets of nozzles, and the wax liquid is injected vertically downward, resulting in uneven wax liquid flow. Especially when the mold shape is complex, the pattern is unclear due to insufficient filling.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: a wax injection machine with accurate pattern forming, including a machine body and a wax injection mold arranged on the machine body, and also including a nozzle assembly, the nozzle assembly is located above the wax injection mold, and injects wax into the wax injection mold; the wax injection mold has a central hole in the upper central area, and the wax injection mold has side inclined holes on both sides of the upper part, and the side inclined holes are located in the central area between the central hole and the edge of the mold; the nozzle assembly includes a central nozzle and a side nozzle, and the central nozzle and the side nozzle can simultaneously inject wax into the wax injection mold Internal wax injection to expand the wax injection area to adapt to the required large pattern wax model: wherein the middle nozzle is located above the middle hole, and the middle nozzle is used to be inserted into the middle hole and inject wax into the wax injection mold in an inclined injection manner, so that the middle wax liquid is injected into the wax injection mold in the form of vertical self-flow and pressure injection; wherein the side nozzle is located above the side inclined hole, and the side nozzle is used to be inserted into the side inclined hole and inject wax into the wax injection mold in an inclined injection manner, so that the side wax liquid is injected into the wax injection mold in the form of vertical self-flow and pressure injection.

[0009] Furthermore, the inclination angle of the side inclined hole is 30-45°; there are inclined cavities on both sides of the center nozzle, and the inclined cavity is a hole that is gradually inclined from top to bottom away from the center of the center nozzle, and the inclination angle of the inclined cavity is 30-45°; the diameter of the inclined cavity gradually decreases from top to bottom.

[0010] Furthermore, the wax injection mold includes a lower mold and an upper mold arranged above the lower mold; the upper mold is formed by two symmetrical single-petal molds, and the relatively close sides of the two single-petal molds are provided with protruding edges, and the two opposite protruding edges are pre-connected by bolts; the middle hole is composed of semi-straight holes on the two single-petal molds, and each side inclined hole is composed of semi-inclined holes on the two single-petal molds.

[0011] Furthermore, it also includes a main pressure plate and a downward pressure assembly assembled on the machine body for pushing the main pressure plate downward, so that the main pressure plate can close the upper mold and the lower mold, and a hollow cavity for accommodating the nozzle assembly is opened in the middle of the main pressure plate; side pressure assemblies are provided on the lower edges of both sides of the main pressure plate, and the side pressure assemblies are used to apply relative thrust to the two single-flap molds, so that when the main pressure plate presses down on the upper mold, the side pressure assemblies can make the two single-flap molds tightly closed.

[0012] Furthermore, the side pressure assembly includes a side pressure plate, which is fixed to the lower edges on both sides of the main pressure plate by long bolts. The preset position of the side pressure plate is a position capable of extruding the single-flap mold, and a slope is provided on the lower edge of one side of the side pressure plate close to the single-flap mold.

[0013] Furthermore, the side pressure assembly includes: side extension edges, which are integrally formed on the lower edges of both sides of the main pressure plate, and a side pressure plate is fixedly provided on the side of the side extension edge close to the wax injection mold through a first spring, and the side pressure plate can pass over the side of the single-petal mold under the natural state of the first spring, so that when the side pressure plate moves down to the side of the single-petal mold, the first spring is in a compressed state to squeeze the side pressure plate; a first pressure rod, one end of the first pressure rod is fixedly connected to the side pressure plate, and the other end of the first pressure rod is fixedly provided with a limit plate after passing through the side extension edge; a slope is provided on the lower edge of one side of the side pressure plate close to the single-petal mold.

[0014] Furthermore, the side pressure assembly includes: a side extension edge, which is integrally formed on the lower edges of both sides of the main pressure plate, and a side pressure plate is fixedly provided on the side of the side extension edge close to the wax injection mold through a second spring, and a gap is provided between the side pressure plate and the single-flap mold in a natural state of the second pressure rod; a second pressure rod, one end of the second pressure rod is fixed on the side pressure plate, and the other end of the second pressure rod passes through the side extension edge; an auxiliary platform, which is fixed on the machine body at a position opposite to the second pressure rod, and a pressure protrusion is provided on the side of the auxiliary platform close to the side extension edge, so that when the side pressure assembly moves downward with the main pressure plate, the pressure protrusion can apply pressure to the single-flap mold through the second pressure rod and the side pressure plate.

[0015] Furthermore, the nozzle assembly also includes: a main head, the middle nozzle is fixed below the main head, and the side nozzles are connected on both sides of the main head through side tubes; a distance adjustment structure, the side tube is used to assemble the side nozzles on the upper end of the middle nozzle, so that the side tube can adjust the distance between itself and the middle nozzle; a guide groove is provided on the side of the single-petal mold close to the side inclined hole, so that the side nozzle is guided when it moves down to the upper surface of the upper mold, so that the side nozzle enters the side inclined hole; a narrow spray chamber is provided in the side nozzle, and a negative pressure suction pipe is assembled on the side nozzle, one end of the negative pressure suction pipe is connected to the narrow spray chamber, and the other end of the negative pressure suction pipe is taken into the guide groove to absorb excess wax liquid in the guide groove.

[0016] Furthermore, the distance adjustment structure includes: a middle platform, which is fixed at the middle nozzle near the upper end, and a movable seat is provided on both sides of the middle platform; an adjusting rod, which is provided with a thread, and the adjusting rod is connected to the middle platform through the thread, and the end of the adjusting rod close to the movable seat passes through the movable seat to adjust the distance between the movable seat and the middle platform when the adjusting rod rotates to adapt to the side nozzles in different positions; a rotating seat, which is fixed at the upper end of the side nozzle, and the rotating seat is rotatably connected to the mobile seat, so that the side nozzle can continuously adjust its own angle through the side inclined hole when it moves downward.

[0017] Furthermore, the downward pressing assembly includes: a downward pressing hydraulic cylinder, which is installed in the upper middle part of the machine body and is used to provide downward force; a movable plate, which is fixed to the lower end of the piston rod of the downward pressing hydraulic cylinder, and the lower part of the movable plate is fixedly connected to the main pressing plate through a connecting rod; a guide rod, which is installed between the movable plate and the main pressing plate; a feed pipe is fixed to the upper end of the main head through a top plate, and brackets are provided on both sides of the top plate, the other end of the bracket is sleeved on the guide rod, and a third spring is provided between the bracket and the movable plate.

[0018] The present invention has the following beneficial effects: (1) The wax injection machine with accurate pattern molding, provided by the embodiment of the present invention, has three injection holes arranged on the mold and is equipped with three corresponding nozzles, so that the purpose of multi-point wax injection and rapid wax injection can be achieved.

[0019] (2) The wax injection machine with accurate pattern forming allows the wax liquid to be injected into the wax injection mold in the form of vertical self-flow and pressure injection. Thus: on the one hand, the wax liquid of the inclined wax injection has a vertical flow direction. Compared with the side injection, it can use gravity to help the wax liquid flow into the mold quickly, thereby reducing the filling time; on the other hand, the wax liquid of the inclined wax injection has a horizontal flow trend, which can quickly fill the entire mold and improve the filling uniformity like the side injection, thereby ensuring the accuracy of the pattern wax mold; thirdly, compared with the injection method of multiple side nozzles in the prior art, the distance between each nozzle (two side nozzles and one middle nozzle) and the farthest point that can be sprayed is shortened, reducing the range of the wax liquid that needs to flow in the mold after injection (that is, the wax liquid only needs to flow slightly in the corresponding area after injection to maintain the stability of the wax liquid level), further accelerating the filling speed; fourthly, there will be no contact between the wax beams injected, which will not cause the wax liquid to atomize, thereby maintaining the liquid stability of the wax.

[0020] (3) The wax injection machine with accurate pattern forming has an upper mold that is assembled from two single-piece molds, thereby facilitating the cleaning of the perforations.

[0021] (4) The wax injection machine with accurate pattern forming can squeeze the side single-flap mold from the side when pressing down the upper mold by setting a side pressure component, thereby ensuring the sealing of the upper mold.

[0022] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an overall diagram of the first embodiment of the present invention; Figure 2 For the present invention Figure 1The main view; Figure 3 It is a mold drawing of the wax injection mold of the present invention; Figure 4 This is a cutaway view of the wax injection mold of the present invention after being disassembled; Figure 5 This is a cross-sectional view of the main pressing plate and the wax injection mold from the front perspective in the first embodiment of the present invention; Figure 6 It is a cross-sectional view of the upper mold from the right perspective in the first embodiment of the present invention; Figure 7 For the present invention Figure 6 A magnified image of area A; Figure 8 Schematic diagram of the internal structure of the nozzle in the present invention; Fig. 9 This is a diagram showing the coordination between the side pressure plate and the wax injection mold from the front perspective of the first embodiment of the present invention; Fig.10 Schematic diagram of the position of the nozzle assembly in the wax injection state from the front perspective in the first embodiment of the present invention; Fig.11 It is a front view of the nozzle assembly in the wax injection state in the first embodiment of the present invention; Fig.12 The cutaway view of the side nozzle of the present invention Fig.13 It is a first state diagram of the distance adjustment structure of the present invention; Fig.14 A second state diagram of the distance adjustment structure of the present invention; Fig.15 A flow chart of inserting a side nozzle into a side oblique hole of the present invention; Fig.16 is a schematic diagram of a side pressure assembly in Embodiment 2 of the present invention; Fig.17 This is a schematic diagram of the structure of the side pressure assembly in the third embodiment of the present invention; Fig.18 A schematic diagram of the pressure protrusion of the present invention pushing the second pressure rod; Fig.19 This is a diagram showing the coordination between the side pressure assembly and the wax injection mold in the third embodiment of the present invention; Fig. 20 Schematic diagram of the structure of the auxiliary platform in the third embodiment of the present invention; Fig.21 It is a schematic diagram of the structure of the side pressure plate in the third embodiment of the present invention.

[0024] In the figure, 1, support leg; 2, guide column; 3, machine body; 31, upper machine body; 32, lower machine body; 33, operating table; 4, pressing assembly; 41, pressing hydraulic cylinder; 42, moving plate; 43, connecting rod; 44, guide rod; 441, third spring; 5, wax injection mold; 51, lower mold; 52, upper mold; 502, single-flap mold; 521, middle hole; 522, side inclined hole; 523, guide groove; 524, extended edge; 6, main pressure plate; 61, hollow cavity; 62, long hole; 7, side pressure assembly; 71, side pressure Plate; 72, long bolt; 73, side extension edge; 74, first spring; 75, first pressure rod; 76, second pressure rod; 77, second spring; 78, auxiliary platform; 79, pressure protrusion; 8, nozzle assembly; 81, main head; 82, middle nozzle; 821, oblique cavity; 83, distance adjustment structure; 831, middle platform; 832, rotating seat; 833, adjusting rod; 834, moving seat; 84, side pipe; 85, side nozzle; 851, narrow spray cavity; 86, top plate; 87, feed pipe; 88, bracket; 9, negative pressure suction pipe. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0027] According to the following Figure 1-Figure 21 A wax injection machine with accurate pattern forming provided by an embodiment of the present invention is described.

[0028] Embodiment 1 See also Figure 1 and Figure 2The embodiment of the present invention provides a wax injection machine with accurate pattern molding, including a machine body 3 and a wax injection mold 5 arranged on the machine body 3, the machine body 3 includes a lower body 32 and an upper body 31 located above the lower body 32, the lower body 32 is fixedly connected to one side of the upper body 31 through a vertical plate, an operating table 33 is provided on the upper surface of the lower body 32, and the side of the operating table 33 away from the vertical plate should protrude from the lower body 32, and a supporting leg 1 should be installed below the protruding portion, and the wax injection mold 5 is wax-injected at the non-protruding portion of the upper surface of the operating table 33.

[0029] Specifically, a center hole 521 is provided in the central area of ​​the upper part of the wax injection mold 5, and side inclined holes 522 are provided on both sides of the upper part of the wax injection mold 5. The side inclined holes 522 are located in the center area between the center hole 521 and the edge of the mold, preferably at the midpoint of the center hole 521 and the edge of the mold. Wax is injected into the wax injection mold 5 synchronously through the center hole 521 and the side inclined holes 522. On the first hand, the amount of wax injection per unit time can be increased and the wax injection time can be shortened. On the second hand, the single-point wax injection can avoid the problem that the nozzle and the wax liquid cannot be completely covered. The ductility can also be expanded without the need to be greatly expanded.

[0030] Combination Figure 3 and Figure 4 As shown, a nozzle assembly 8 is also provided to inject wax into the wax injection mold 5. The nozzle assembly 8 is located above the wax injection mold 5. The nozzle assembly 8 includes a middle nozzle 82 and a side nozzle 85. The middle nozzle 82 and the side nozzle 85 can simultaneously inject wax into the wax injection mold 5 to expand the wax injection area to accommodate the required large pattern wax mold.

[0031] Therefore, the wax injection machine with accurate pattern molding provided by the embodiment of the present invention can achieve the purpose of multi-point wax injection and rapid wax injection because three injection holes are set on the mold and equipped with corresponding three nozzles.

[0032] Combination Figure 5 - Figure 7 As shown, the above-mentioned center nozzle 82 is located above the center hole 521, and the center nozzle 82 is used to be inserted into the center hole 521 and inject wax into the wax mold 5 in an inclined spraying manner, so that the middle wax liquid is injected into the wax mold 5 in the form of vertical self-flow and pressure injection; the side nozzle 85 is located above the side inclined hole 522, and the side nozzle 85 is used to be inserted into the side inclined hole 522 and inject wax into the wax mold 5 in an inclined spraying manner, so that the side wax liquid is injected into the wax mold 5 in the form of vertical self-flow and pressure injection.

[0033] The above-mentioned method of injecting wax into the wax injection mold 5 in an inclined spraying manner so that the side wax liquid is injected into the wax injection mold 5 in the form of vertical self-flow and pressure injection spraying is expressed as follows: on the one hand, the wax liquid of the inclined wax injection has a vertical flow direction, which can use gravity to help the wax liquid flow into the mold quickly compared to the side injection, thereby reducing the filling time; on the other hand, the wax liquid of the inclined wax injection has a horizontal flow direction, which can quickly fill the entire mold, thereby ensuring the accuracy of the pattern wax mold.

[0034] Thirdly, compared with the injection method of multiple side nozzles in the prior art, the distance between each nozzle (two side nozzles 85 and one middle nozzle 82) and the farthest point at which it can spray is shortened, and the range of flow of the wax liquid in the mold after injection is reduced (that is, the wax liquid after injection only needs to flow slightly in the corresponding area to maintain the stability of the wax liquid level), further accelerating the filling speed; fourthly, there will be no contact between the various injected wax beams, which will not cause the wax liquid to atomize, thereby maintaining the liquid stability of the wax.

[0035] Combination Figure 4 and Figure 8 As shown, preferably, the above-mentioned side inclined hole 522 has an inclination angle of 30-45°, and both sides of the middle nozzle 82 have inclined cavities 821, and the inclined cavity 821 is a hole that is gradually inclined from top to bottom away from the center of the middle nozzle 82 (that is, the wax liquid ejected from the middle nozzle 82 is divided into two streams), and the inclination angle of the inclined cavity 821 is 30-45°; this angle has a better gravity extension advantage and a better ejection distance in the horizontal direction.

[0036] In addition, the diameter of the oblique cavity 821 here gradually decreases from top to bottom, thereby increasing the injection pressure.

[0037] Combination Figure 1 - Figure 7 As shown, the wax injection mold 5 provided in the embodiment of the present invention includes a lower mold 51 and an upper mold 52 arranged above the lower mold 51, the upper mold 52 is formed by two symmetrical single-petal molds 502, and the relatively close sides of the two single-petal molds 502 are each provided with an extended edge 524, and the two opposite extended edges 524 are pre-connected by bolts.

[0038] The middle hole 521 is composed of semi-straight holes on two single-flap molds 502, and each side inclined hole 522 is composed of semi-slanted holes on two single-flap molds 502. Therefore, disassembling the openings of the two single-flap molds 502 can expose the inner walls of the middle hole 521 and the side inclined holes 522, so as to facilitate cleaning of excess solidified wax liquid that has entered therein.

[0039] In addition, a fourth spring may be used to connect the two protruding edges 524, and a corresponding fourth guide rod should be provided inside the fourth spring to maintain the relative state of the two single-flap molds 502. This connection method only requires pulling the two single-flap molds 502 to clean the impurities in the middle hole 521 and the side inclined hole 522, which is more convenient.

[0040] Combination Figure 1 , Figure 2 , Fig. 9 and Fig.10 As shown, in order to realize the pressing of the upper mold 52 and the lower mold 52, it also includes a main pressure plate 6 and a pressing assembly 4 assembled on the machine body 3 for pushing the main pressure plate 6 downward. When the pressing assembly 4 is working, it can drive the main pressure plate 6 to move downward, so that the main pressure plate 6 can close the upper mold 52 and the lower mold 51. In addition, it is best to set a limit column on the lower mold 51 and a limit groove on the upper mold 51 to maintain the relative positions of the two in the horizontal direction.

[0041] In addition, a hollow cavity 61 for accommodating the nozzle assembly 8 is opened in the middle of the main pressure plate 6 , that is, the entire nozzle assembly 8 is located in the hollow cavity 61 .

[0042] In order to prevent the wax liquid from overflowing from the gap between the two single-flap molds 502 due to high pressure during the wax injection stage, side pressure assemblies 7 are provided on the lower edges of both sides of the two main pressure plates 6. The side pressure assemblies 7 are used to apply relative thrust to the two single-flap molds 502, so that when the main pressure plate 6 presses down the upper mold 52, the side pressure assemblies 7 can make the two single-flap molds 502 tightly closed to avoid liquid leakage.

[0043] Specifically, Fig. 9 , Fig.10 as well as Fig.11 As shown, the side pressure assembly 7 includes a side pressure plate 71, which is fixed to the lower edges on both sides of the main pressure plate 6 by long bolts 72. The preset position of the side pressure plate 71 is a position capable of extruding the single-flap mold 502, and the side pressure plate 71 is provided with a slope at the lower edge of one side close to the single-flap mold 502. When the main pressure plate 6 presses down the upper mold 52, the side pressure plate 71 can relatively squeeze the single-flap mold 502, so that the two single-flap molds 502 are tightly closed, thereby ensuring the sealing of the upper mold 52.

[0044] Preferably, the hole on the main pressure plate 6 that matches the long bolt 72 is a long hole 62 to adjust the position of the side pressure plate 71 so that the preset position of the side pressure plate 71 is a position capable of squeezing the side of the upper mold 52 .

[0045] Combination Figure 6 and Figure 7As shown, the nozzle assembly 8 mentioned above also includes a main head 81 and a distance adjustment structure 83, wherein the middle nozzle 82 is fixed below the main head 81, and the side nozzles 85 are connected to both sides of the main head 81 through side tubes 84. Preferably, the side tubes 84 are hoses, and the distance adjustment structure 83 is used to assemble the side nozzles 85 on the upper end of the middle nozzle 82, so that the side nozzles 85 can adjust the distance between themselves and the middle nozzle 82, thereby adjusting the specific position of the side nozzles 85, so that the side nozzles 85 can be aligned with the side inclined holes 522.

[0046] Preferably, a guide groove 523 is provided on one side of the single-petal mold 502 close to the side inclined hole 522 to guide the side nozzle 85 when it moves down to the upper surface of the upper mold 52, so that the side nozzle 85 enters the side inclined hole 522, thereby avoiding the situation where the side nozzle 85 cannot enter the side inclined hole 522.

[0047] In actual use, the diameter of the side nozzle 85 should be slightly smaller than the diameter of the side inclined hole 522, so that the side nozzle 85 can enter the side inclined hole 522 more conveniently. However, this will result in a certain small gap between the two, and a part of the high-pressure wax liquid will overflow from this gap and enter the guide groove 523. Therefore, a narrow spray chamber 851 is provided in the side nozzle 85, and a negative pressure suction pipe 9 is assembled on the side nozzle 85. One end of the negative pressure suction pipe 9 is connected to the narrow spray chamber 851, and the other end of the negative pressure suction pipe 9 is sucked into the guide groove 523 to absorb the excess wax liquid in the guide groove 523. Fig.12 It can be better understood; in this embodiment, when the wax liquid passes through the narrow spray chamber 851, it can generate negative pressure in the negative pressure suction pipe 9, so that the negative pressure suction pipe 9 reabsorbs the wax liquid in the guide groove 523 to avoid the accumulation of overflowed wax liquid.

[0048] Combination Fig.13 and Fig.14 As shown, the distance adjustment structure 83 mentioned above includes a middle platform 831, an adjusting rod 833 and a rotating seat 832, wherein the middle platform 831 is fixed near the upper end of the middle nozzle 82, and movable seats 834 are provided on both sides of the middle platform 831. Specifically, a thread is provided on the adjusting rod 833, and the adjusting rod 833 is connected to the middle platform 831 through the thread, so that when the adjusting rod 833 is rotated, it can generate relative displacement with the middle platform 831, and the end of the adjusting rod 833 close to the movable seat 834 is passed through the movable seat 834 (the adjusting rod 833 and the movable seat 834 should also be equipped with corresponding limiting structures to limit the axial relative displacement of the adjusting rod 833 and the movable seat 834), so that when the adjusting rod 833 rotates, the distance between the movable seat 834 and the middle platform 831 is adjusted to adapt to the side nozzles 85 in different positions.

[0049] In addition, the rotating seat 832 is fixed to the upper end of the side nozzle 85, and the rotating seat 832 is rotatably connected to the moving seat 834, so that the side nozzle 85 can continuously adjust its own angle through the side inclined hole 522 when moving downward.

[0050] Specifically, Fig.15 The flow chart of the side nozzle 85 and the middle nozzle 82 entering the side inclined hole 522 and the middle hole 521 is shown as follows: 1) In the initial state, the side nozzle 85 is naturally slightly inclined outward, such as Fig.15 (a); 2) As the lower pressure assembly 4 moves downward, the main pressure plate 6 moves downward to drive the side pressure assembly 7 to move downward, and drives the entire side nozzle 85 and the middle nozzle 82 to move downward until the side nozzle 85 reaches the guide groove 523, as shown in FIG. Fig.15 (b); As the main pressure plate 6 continues to descend, the side nozzle 85 enters the side inclined hole 522 and gradually adjusts its angle due to the restriction of the side inclined hole 522, such as Fig.15 (c) As the main pressure plate 6 continues to descend, the side nozzle 85 completely enters the side inclined hole 522, and the middle nozzle 82 completely enters the middle hole 521. Fig.15 (d).

[0051] Combination Figure 1 , Figure 2 , Figure 5 and Figure 6 As shown, the pressing assembly 4 in the wax injection machine with accurate pattern forming provided by the embodiment of the present invention includes a pressing hydraulic cylinder 41, a movable plate 42, a connecting rod 43 and a guide rod 44. The pressing hydraulic cylinder 41 is installed in the upper middle part of the machine body 3 (that is, fixed in the upper machine body 31), and the pressing hydraulic cylinder 41 is used to provide downward force. The movable plate 42 is fixed to the lower end of the piston rod of the pressing hydraulic cylinder 41, and the lower part of the movable plate 42 is fixedly connected to the main pressure plate 6 through the connecting rod 43. The connecting rod 43 is fixed between the movable plate 42 and the main pressure plate 6, and is used to connect the movable plate 42 and the main pressure plate 6, so that when the pressing hydraulic cylinder 41 is extended, the movable plate 42 can drive the main pressure plate 6 to move.

[0052] Preferably, a guide column 2 is installed between the upper body 31 and the lower body 32 to guide the movement of the movable plate 42 .

[0053] The guide rod 44 is mainly used for assembling the nozzle assembly 8, which is installed between the movable plate 42 and the main pressure plate 6. The upper end of the main head 81 is fixed with a feed pipe 87 through a top plate 86, and brackets 88 are provided on both sides of the top plate 86. The other end of the bracket 88 is sleeved on the guide rod 44, and a third spring 441 is provided between the bracket 88 and the movable plate 42. This third spring 441 is used to compensate for the difference in the downward movement distance of each nozzle and the downward movement distance of the main pressure plate 6.

[0054] The feed pipe 87 mentioned here should be connected to the feeding hydraulic cylinder through a bellows, and the feeding hydraulic cylinder is connected to the barrel.

[0055] In the present invention, the nozzle is directly driven to move downward by the downward movement of the main pressure plate 6, and there is no need to equip the nozzle with a hydraulic cylinder.

[0056] When in use (working), in the initial state, the bracket 88 is located at the lower end of the guide rod 44, and the third spring 441 is in a natural state. The wax injection mold 5 is placed on the upper surface of the operating table 33 and is located below the main pressure plate 6. The main pressure plate 6 is driven to move downward by driving the downward hydraulic cylinder 41. During its downward movement, the side nozzle 85 and the middle nozzle 82 are gradually inserted into the side inclined hole 522 and the middle hole 521. At this time, the main pressure plate 6 continues to press downward, so that the side pressure plate 71 squeezes the single-petal mold 502 to form a sealed state of the upper mold 52. As the main pressure plate 6 continues to press downward, the main pressure plate 6 squeezes the upper mold 52 downward, and then the loading hydraulic cylinder feeds wax liquid from the barrel. The wax liquid passes through the bellows, the feed pipe 87, and the main head 81 into the middle nozzle 82 and the side nozzle 85 for inclined injection, thereby improving the accuracy and filling speed of the wax mold.

[0057] Embodiment 2 like Fig.16 As shown, the difference between this embodiment and the first embodiment is that the side pressure assembly 7 includes a side extension edge 73 and a first pressure rod 75: wherein the side extension edge 73 is integrally formed on the lower edges on both sides of the main pressure plate 6, and the side of the side extension edge 73 close to the wax injection mold 5 is fixed with a side pressure plate 71 through a first spring 74, and in the natural state of the first spring 74, the side pressure plate 71 can pass over the side of the single-flap mold 502 (the passing here refers to passing along the single-flap mold 502 toward the center of the mold), so that when the side pressure plate 71 moves down to the side of the single-flap mold 502, the first spring 74 is in a compressed state to squeeze the side pressure plate 71.

[0058] In the present embodiment, the main pressure plate 6 moves downward to drive the side pressure assembly 7 to move downward. When the side pressure plate 71 is located on the side of the single-flap mold 502, the side of the single-flap mold 502 can squeeze the first spring 74, so that the first spring 74 is in a compressed state. Therefore, the first spring 74 can generate pressure on the single-flap mold 502, thereby increasing the squeezing force of the side pressure assembly 7 on the single-flap mold 502.

[0059] Preferably, a first pressure rod 75 is also provided, one end of which is fixedly connected to the side pressure plate 71, and the other end of the first pressure rod 75 is fixedly provided with a limit plate after passing through the side extension edge 73. The first pressure rod 75 actually guides the first spring 74, and the limit plate can limit the first pressure rod 75 from detaching from the side extension edge 73 when the first spring 74 is in a natural state.

[0060] Preferably, a slope is provided at a lower edge of one side of the side pressure plate 71 close to the single-flap mold 502 to facilitate the initial downward movement of the side pressure plate 71 to the outside of the single-flap mold 502 .

[0061] Embodiment 3 Combination Figure 17-Figure 21 As shown, the difference between this embodiment and the above two embodiments is that the side pressure assembly 7 includes a side extension edge 73 , a second pressure rod 76 and an auxiliary platform 78 .

[0062] The side extension edges 73 are integrally formed on the lower edges of both sides of the main pressure plate 6, and a side pressure plate 71 is fixed to the side of the side extension edge 73 close to the wax injection mold 5 through a second spring 77. In the natural state of the second pressure rod 76, there is a gap between the side pressure plate 71 and the single-flap mold 502. This gap enables the side pressure plate 71 to move smoothly down to the outside of the single-flap mold 502. One end of the second pressure rod 76 is fixed on the side pressure plate 71, and the other end of the second pressure rod 76 passes through the side extension edge 73. The auxiliary platform 78 is fixed on the body 3 at a position opposite to the second pressure rod 76, and a pressure protrusion 79 is provided on the side of the auxiliary platform 78 close to the side extension edge 73.

[0063] In this embodiment, when the main pressure plate 6 moves downward and drives the side pressure assembly 7 to move downward, the second pressure rod 76 can be gradually pushed by the pressure protrusion 79, so that when the second pressure rod 76 and the side pressure plate 71 apply pressure to the single-flap mold 502, the two single-flap molds 502 are sealed.

[0064] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0065] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A wax injection machine with accurate pattern forming, comprising a machine body (3) and a wax injection mold (5) arranged on the machine body (3), characterized in that: It also includes a nozzle assembly (8), wherein the nozzle assembly (8) is located above the wax injection mold (5) and injects wax into the wax injection mold (5); The wax injection mold (5) has a central hole (521) in the upper central area, and has side oblique holes (522) on both sides of the upper part of the wax injection mold (5), wherein the side oblique holes (522) are located in the central area between the central hole (521) and the mold edge; The nozzle assembly (8) comprises a central nozzle (82) and a side nozzle (85), and the central nozzle (82) and the side nozzle (85) can simultaneously inject wax into the wax mold (5) to expand the wax injection area and adapt to the required large pattern wax mold: The middle injection nozzle (82) is located above the middle hole (521), and is used to be inserted into the middle hole (521) and inject wax into the wax injection mold (5) in an inclined injection manner, so that the middle wax liquid is injected into the wax injection mold (5) in the form of vertical self-flow and pressure injection; The side injection nozzle (85) is located above the side inclined hole (522), and is used to be inserted into the side inclined hole (522) and inject wax into the wax injection mold (5) in an inclined injection manner, so that the side wax liquid is injected into the wax injection mold (5) in the form of vertical self-flow and pressure injection.

2. A wax injection machine with accurate pattern forming according to claim 1, characterized in that: The inclination angle of the side inclined hole (522) is 30-45°; Both sides of the middle nozzle (82) are provided with oblique cavities (821), the oblique cavities (821) being holes that are gradually inclined from top to bottom away from the center of the middle nozzle (82), and the inclination angle of the oblique cavities (821) is 30-45°; The diameter of the oblique cavity (821) gradually decreases from top to bottom.

3. A wax injection machine with accurate pattern forming according to claim 1, characterized in that: The wax injection mold (5) comprises a lower mold (51) and an upper mold (52) arranged above the lower mold (51); The upper mold (52) is formed by two symmetrical single-flap molds (502), and the two single-flap molds (502) are provided with a protruding edge (524) on the relatively close side, and the two opposite protruding edges (524) are pre-connected by bolts. The middle hole (521) is composed of semi-straight holes on the two single-flap molds (502), and each side inclined hole (522) is composed of semi-inclined holes on the two single-flap molds (502).

4. A wax injection machine with accurate pattern forming according to claim 3, characterized in that: It also includes a main pressing plate (6) and a pressing assembly (4) assembled on the machine body (3) for pushing the main pressing plate (6) downward, so that the main pressing plate (6) can close the upper mold (52) and the lower mold (51), and a hollow cavity (61) for accommodating the nozzle assembly (8) is provided in the middle of the main pressing plate (6); The lower edges of both sides of the main pressure plate (6) are provided with side pressure components (7), and the side pressure components (7) are used to apply relative thrust to the two single-flap molds (502), so that when the main pressure plate (6) presses down the upper mold (52), the side pressure components (7) can make the two single-flap molds (502) tightly closed.

5. A wax injection machine with accurate pattern forming according to claim 4, characterized in that: The side pressure assembly (7) comprises a side pressure plate (71), wherein the side pressure plate (71) is fixed to the lower edges of both sides of the main pressure plate (6) by means of long bolts (72), the preset position of the side pressure plate (71) is a position capable of squeezing the single-flap mould (502), and a slope is provided at a lower edge of one side of the side pressure plate (71) close to the single-flap mould (502).

6. A wax injection machine with accurate pattern forming according to claim 4, characterized in that: The side pressure assembly (7) comprises: Side extension edges (73), the side extension edges (73) are integrally formed at the lower edges of both sides of the main pressure plate (6), and a side pressure plate (71) is fixedly provided on one side of the side extension edge (73) close to the wax injection mold (5) through a first spring (74), and the side pressure plate (71) can pass over the side of the single-flap mold (502) in a natural state of the first spring (74), so that when the side pressure plate (71) moves down to the side of the single-flap mold (502), the first spring (74) is in a compressed state to squeeze the side pressure plate (71); A first pressure rod (75), one end of the first pressure rod (75) being fixedly connected to the side pressure plate (71), and the other end of the first pressure rod (75) passing through the side extension edge (73) and being fixedly provided with a limit plate; The side pressure plate (71) is provided with an inclined surface at a lower edge on one side close to the single-flap mold (502).

7. A wax injection machine with accurate pattern forming according to claim 4, characterized in that: The side pressure assembly (7) comprises: Side extension edges (73), the side extension edges (73) are integrally formed on the lower edges of both sides of the main pressure plate (6), and a side pressure plate (71) is fixedly provided on one side of the side extension edge (73) close to the wax injection mold (5) via a second spring (77), and a gap exists between the side pressure plate (71) and the single-flap mold (502) when the second pressure rod (76) is in a natural state; A second pressure rod (76), one end of the second pressure rod (76) being fixed on the side pressure plate (71), and the other end of the second pressure rod (76) passing through the side extension edge (73); An auxiliary platform (78) is fixed on the machine body (3) at a position opposite to the second pressure rod (76), and a pressure protrusion (79) is provided on a side of the auxiliary platform (78) close to the side extension edge (73), so that when the side pressure assembly (7) moves downward with the main pressure plate (6), the pressure protrusion (79) can apply pressure to the single-flap mold (502) through the second pressure rod (76) and the side pressure plate (71).

8. A wax injection machine with accurate pattern forming according to any one of claims 1 to 7, characterized in that: The nozzle assembly (8) further comprises: A main head (81), the middle nozzle (82) is fixed below the main head (81), and the side nozzles (85) are connected to both sides of the main head (81) through side pipes (84); A distance adjustment structure (83), wherein the distance adjustment structure (83) is used to assemble the side nozzle (85) on the upper end of the middle nozzle (82), so that the side nozzle (85) can adjust the distance between itself and the middle nozzle (82); A guide groove (523) is provided on one side of the single-flap mold (502) close to the side inclined hole (522) so as to guide the side nozzle (85) when the side nozzle (85) moves downward to reach the upper surface of the upper mold (52) so as to allow the side nozzle (85) to enter the side inclined hole (522); The side-shooting nozzle (85) has a narrow spray chamber (851) therein, and a negative pressure suction pipe (9) is assembled on the side-shooting nozzle (85), one end of the negative pressure suction pipe (9) is in communication with the narrow spray chamber (851), and the other end of the negative pressure suction pipe (9) is sucked into the guide groove (523) to absorb excess wax liquid in the guide groove (523).

9. A wax injection machine with accurate pattern forming according to claim 8, characterized in that: The distance adjustment structure (83) comprises: A middle platform (831), wherein the middle platform (831) is fixed near the upper end of the middle nozzle (82), and movable seats (834) are provided on both sides of the middle platform (831); An adjusting rod (833), wherein the adjusting rod (833) is provided with a thread, and the adjusting rod (833) is connected to the middle platform (831) via the thread, and an end of the adjusting rod (833) close to the movable seat (834) passes through the movable seat (834), so as to adjust the distance between the movable seat (834) and the middle platform (831) when the adjusting rod (833) rotates, so as to adapt to the side nozzles (85) at different positions; The rotating seat (832) is fixed to the upper end of the side nozzle (85), and the rotating seat (832) is rotatably connected to the moving seat (834), so that the side nozzle (85) can continuously adjust its angle through the side inclined hole (522) when moving downward.

10. The wax injection machine with accurate pattern forming according to claim 1, characterized in that: The pressing component (4) comprises: A downward pressure hydraulic cylinder (41), the downward pressure hydraulic cylinder (41) being installed in the upper middle part of the machine body (3), and the downward pressure hydraulic cylinder (41) being used to provide downward pressure; A movable plate (42), wherein the movable plate (42) is fixed to the lower end of the piston rod of the downward pressure hydraulic cylinder (41), and the lower part of the movable plate (42) is fixedly connected to the main pressure plate (6) via a connecting rod (43); A connecting rod (43), wherein the connecting rod (43) is fixed between the movable plate (42) and the main pressing plate (6) and is used to connect the movable plate (42) and the main pressing plate (6); A guide rod (44) is installed between the movable plate (42) and the main pressure plate (6); a feed pipe (87) is fixed to the upper end of the main head (81) via a top plate (86); brackets (88) are provided on both sides of the top plate (86); the other end of the bracket (88) is sleeved on the guide rod (44); and a third spring (441) is provided between the bracket (88) and the movable plate (42).

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