Novel PPS high-temperature material gear injection mold

Abstract

A novel PPS high-temperature material gear injection mold comprises an upper mold body, a lower mold body, a lower mold base, a pouring mechanism and an ejection mechanism, the top of the upper mold body is connected with an upper mold cover, the upper mold body comprises an upper mold upper plate, an upper mold middle bearing plate and an upper mold lower plate, the pouring mechanism extends into the upper mold body from the upper mold cover, a shaping gear sleeve is arranged in an upper mold core, and the ejection mechanism is connected with the lower mold base. A gear is integrally connected to the top of the shaping gear sleeve, a shaping sleeve is fixedly connected to the inner wall of the shaping gear sleeve, the upper die body, the lower die body and the lower die base are movably connected through a sliding lock catch, a circulating flowing cooling system is arranged in the upper die body and the lower die body, a rifle rod is arranged between the lower die body and the upper die lower plate, and a gear sleeve is connected to the rifle rod in a threaded mode. And the gear sleeve is in meshed connection with the gears on the four shaping gear sleeves. The gear sleeve arranged on the rifle drives the shaping gear sleeve on the product to be in meshing transmission, the shaping gear sleeve rotates to precisely shape the helical tooth part of the product during demolding, and the precision of the gear product is improved.

Description

Technical Field

[0001] The utility model relates to the field of injection molds, and particularly to a novel injection mold for gears made of PPS high-temperature material. Background Art

[0002] An injection mold injects the heat-melted plastic into the mold cavity under high pressure by an injection molding machine, and a formed product is obtained after cooling and solidification. PPS is a high-temperature resistant engineering material with high strength, high rigidity, and creep resistance. It is commonly known as "plastic steel" in the market and has good fluidity. It is the main material type for replacing steel with plastic. Using PPS high-temperature material as the raw material for gear injection molding, the manufactured gears have the advantages of light weight and low noise during operation that metal gears do not have. The helical tooth part structure in plastic gears is relatively special, and there is a problem of difficult demolding in actual production. In the past, for demolding the helical tooth part, since the teeth are inclined, they cannot be directly ejected during ejection, and a rotating ejection mechanism needs to be made to eject while rotating. Currently, the ejector pin method is mostly used to eject the product in the cavity, and it rotates when relying on its own gravity for demolding. Inevitably, damage to the helical teeth or non-standard tooth shapes will be caused during the demolding process, resulting in low processing accuracy, poor product fit during application, large noise, and easy to cause defective products. Summary of the Invention

[0003] The utility model aims to solve the deficiencies of the prior art and provides a novel injection mold for gears made of PPS high-temperature material.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] A novel injection mold for gears made of PPS high-temperature material includes an upper mold body, a lower mold body, a lower mold base, a pouring mechanism, and an ejection mechanism. The top of the upper mold body is connected with an upper mold cover. The upper mold body includes an upper mold upper plate, an upper mold middle bearing plate, and an upper mold lower plate. The pouring mechanism extends from the upper mold cover into the upper mold body. The pouring mechanism has four pouring points in the upper mold body and extends to four upper mold cores on the upper mold lower plate. A shaping gear sleeve is arranged inside the upper mold core, a gear is integrally connected to the top of the shaping gear sleeve, and a shaping sleeve is fixedly connected to the inner wall of the shaping gear sleeve. The lower mold body abuts against the lower surface of the upper mold body, and the lower mold body is supported on the lower mold base. The upper mold body, the lower mold body, and the lower mold base are movably connected through sliding latches. A circulating cooling system is arranged inside the upper mold body and the lower mold body. The ejection mechanism is arranged below the lower mold body inside the lower mold base, and the ejector pin of the ejection mechanism abuts against the bottom of the lower mold core. A rifling rod is arranged between the lower mold body and the upper mold lower plate, a gear sleeve is threadedly connected to the rifling rod, the gear sleeve is rotationally clamped on the upper mold lower plate through a bearing, and the gear on the gear sleeve is meshed and connected with the gears on the four shaping gear sleeves.

[0006] The described pouring mechanism includes a pouring port, a pouring pipe, pouring branch pipes, a pouring head, and a pouring head pipe. The pouring port is connected to the pouring pipe arranged in the upper die upper plate. The pouring pipe is divided into four pouring branch pipes. The bottom ends of the pouring branch pipes are connected to the pouring head. The pouring head is arranged in the middle bearing plate of the upper die. Multiple pouring head pipes are obliquely connected to the pouring head, and the bottom ends of the pouring head pipes extend to the top of the helical tooth part of the product.

[0007] The described lower die base includes a lower die base bottom plate, a lower die base support plate, and a lower die base top plate. The lower die base support plate is fixed on the lower die base bottom plate, and the lower die base top plate is fixed on the lower die base support plate.

[0008] The described ejection mechanism includes an ejection bottom plate, an ejector pin fixing plate, ejection support columns, ejection springs, and ejector pins. The ejector pin fixing plate is arranged on the ejection bottom plate. The ejection support columns are arranged at the four corners of the ejector pin fixing plate and penetrate through the lower die base top plate. Ejection springs are sleeved on the ejection support columns. The ejector pins are arranged on the ejector pin fixing plate and extend upward to the bottom of the product.

[0009] The described sliding lock includes an upper sliding plate and a lower fixing plate. The lower fixing plate is fixed on the lower die base support plate. The upper sliding plate is semi - wrapped and slidably sleeved on the lower fixing plate. A first connecting block and a second connecting block are respectively arranged on the upper part and the middle part of the inner side of the upper sliding plate. The first connecting block is connected to the side wall of the upper die upper plate, and the second connecting block is connected to the side wall of the lower die lower plate.

[0010] The beneficial effects of the present utility model are as follows: The present utility model drives the shaping gear sleeve on the product to engage and transmit through the gear sleeve arranged on the rifling rod. When demolding, the shaping gear sleeve rotates to accurately shape the helical tooth part of the product, improving the precision of the gear product. During application, it has a high degree of cooperation with other products and low noise. Description of the Drawings

[0011] Figure 1 is a structural schematic diagram of the present utility model;

[0012] Figure 2 is a front view of the present utility model;

[0013] Figure 3 is Figure 2 a sectional view taken along the A - A direction of

[0014] Figure 4 is Figure 3 a partially enlarged schematic diagram of the local structure at B in

[0015] In the figure: 1 - upper die cover; 2 - upper die body; 21 - upper die top plate; 22 - upper die middle bearing plate; 23 - upper die bottom plate; 3 - lower die body; 4 - lower die base; 41 - lower die base top plate; 42 - lower die base support plate; 43 - lower die base bottom plate; 5 - ejection mechanism; 51 - ejection bottom plate; 52 - ejector pin; 53 - ejector pin fixing plate; 54 - ejection support column; 55 - ejection spring; 6 - sliding lock; 61 - upper sliding plate; 62 - first connecting block; 63 - second connecting block; 64 - lower fixing plate; 7 - cooling system; 8 - pouring mechanism; 81 - pouring port; 82 - pouring pipe; 83 - pouring branch pipe; 84 - pouring head; 85 - pouring head pipe; 9 - upper die core; 10 - shaping gear sleeve; 11 - shaping sleeve; 12 - gear sleeve; 13 - rifling rod; 14 - product

[0016] The following will be described in detail with reference to the embodiments of the present utility model and the accompanying drawings. Specific embodiments

[0017] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments:

[0018] As Figures 1-4 shown, a new type of gear injection mold for PPS high-temperature material includes an upper die body 2, a lower die body 3, a lower die base 4, a pouring mechanism 8 and an ejection mechanism 5. The top of the upper die body 2 is connected to the upper die cover 1. The upper die body 2 includes an upper die top plate 21, an upper die middle bearing plate 22 and an upper die bottom plate 23. The pouring mechanism 8 extends from the upper die cover 1 into the upper die body 2. The pouring mechanism 8 has four pouring points in the upper die body 2 and extends to the four upper die cores 9 of the upper die bottom plate 23. A shaping gear sleeve 10 is arranged inside the upper die core 9. A gear is integrally connected to the top of the shaping gear sleeve 10. A shaping sleeve 11 is fixedly connected to the inner wall of the shaping gear sleeve 10. The lower die body 3 abuts against the lower surface of the upper die body 2. The lower die body 3 is supported on the lower die base 4. The upper die body 2, the lower die body 3 and the lower die base 4 are movably connected through a sliding lock 6. A circulating cooling system 7 is arranged inside the upper die body 2 and the lower die body 3. The ejection mechanism 5 is arranged below the lower die body 3 inside the lower die base 4. The ejector pin 52 of the ejection mechanism 5 abuts against the bottom of the lower die core. A rifling rod 13 is arranged between the lower die body 3 and the upper die bottom plate 23. A gear sleeve 12 is threadedly connected to the rifling rod 13. The gear sleeve 12 is rotatably clamped on the upper die bottom plate 23 through a bearing. The gear on the gear sleeve 12 is meshed and connected with the gears on the four shaping gear sleeves 10.

[0019] The described pouring mechanism 8 includes a pouring port 81, a pouring pipe 82, a pouring branch pipe 83, a pouring head 84, and a pouring head pipe 85. The pouring port 81 is communicated with the pouring pipe 82 arranged in the upper die upper plate 21. The pouring pipe 82 is divided into four pouring branch pipes 83. The bottom end of the pouring branch pipe 83 is connected to the pouring head 84. The pouring head 84 is arranged in the upper die middle plate 22. Multiple pouring head pipes 85 are obliquely connected to the pouring head 84. The bottom end of the pouring head pipe 85 extends to the top of the helical tooth part of the product 14. The product includes a straight ruler part and a helical tooth part, and the helical tooth part faces upward. The pouring head pipe 85 extends to the top of the helical tooth part of the product 14.

[0020] The described lower die base 4 includes a lower die base bottom plate 43, a lower die base support plate 42, and a lower die base top plate 41. The lower die base support plate 42 is fixed on the lower die base bottom plate 43. The lower die base top plate 41 is fixed on the lower die base support plate 42. The lower die base top plate 41 supports the lower die body 3 and at the same time blocks the ejecting spring 55 of the ejecting structure 5 so as to enable the ejecting pin 52 to act.

[0021] The described ejecting mechanism 5 includes an ejecting bottom plate 51, an ejecting pin fixing plate 53, ejecting support columns 54, ejecting springs 55, and ejecting pins 52. The ejecting pin fixing plate 53 is arranged on the ejecting bottom plate 51. The ejecting support columns 54 are arranged at the four corners of the ejecting pin fixing plate 53 and penetrate through the lower die base top plate 41. The ejecting springs 55 are sleeved on the ejecting support columns 54. The ejecting pins 52 are arranged on the ejecting pin fixing plate 53 and extend upward to the bottom of the product 14.

[0022] The described sliding lock 6 includes an upper sliding plate 61 and a lower fixing plate 64. The lower fixing plate 64 is fixed on the lower die base support plate 42. The upper sliding plate 61 is semi - wrapped and slidably sleeved on the lower fixing plate 64. The upper part and the middle part of the inner side of the upper sliding plate 61 are respectively provided with a first connecting block 62 and a second connecting block 63. The first connecting block 62 is connected to the side wall of the upper die upper plate 21, and the second connecting block 63 is connected to the side wall of the upper die lower plate 23.

[0023] During application, the raw material liquid is injected by a pouring machine into the pouring port 81 of the mold pouring mechanism 8. The liquid material flows into four pouring branch pipes 83 through the pouring pipe 82. The end of the pouring branch pipe 83 is connected to the pouring head 84. The pouring head 84 extends into the middle bearing plate 22 of the upper mold. The liquid outlet of the pouring head 84 is communicated with three pouring head pipes 85. The pouring head pipes 85 extend obliquely downward to the upper mold core 9 in the lower plate 23 of the upper mold. A shaping gear sleeve 10 is arranged in the upper mold core 9 of the lower plate 23 of the upper mold. The inner side of the shaping gear sleeve 10 is connected to the shaping sleeve 11. The upper mold cover 1, the upper mold body 2, the lower mold body 3, the lower mold base 4 and the ejection mechanism 5 are connected. The pouring head pipes 85 of the pouring mechanism 8 extend to the top of the helical tooth part of the product 14 for pouring. The cooling system 7 is turned on to cool the product. When the temperature is cooled to 70 - 80 °C, the mold is opened. The upper mold body 2 moves upward with the whole machine. The gear sleeve 12 on the lifter bar 13 moves upward with the lower plate 23 of the upper mold. During the upward movement of the gear sleeve 12, it rotates on the lifter bar 13. The rotation of the gear sleeve 12 drives the four shaping gear sleeves 10 to rotate. The shaping gear sleeves 10 rotate and move upward together with the gear sleeve 12. The shaping sleeve 11 inside the shaping gear sleeve 10 shapes the helical tooth part of the gear during the upward movement, and at the same time, the mold opening action is completed. The upper sliding plate 61 of the sliding lock 6 moves upward with the upper mold body 2. The lower mold body 3 does not move. The lower fixed plate 64 is fixed and does not move with the lower mold base 4. The upper sliding plate 61 slides on the lower fixed plate 64. The separation of the lower plate 23 of the upper mold from the lower mold body 3 exposes the product. The ejection mechanism 5 starts to act. The ejection bottom plate 51 jacks upward, compressing the ejection spring 55. The ejector pins 52 on the ejection bottom plate 51 jack up the product, and the product is taken out mechanically.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0025] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0026] In the present utility model, unless otherwise clearly stipulated and defined, terms such as "installation", "connection", "linkage", "fixation", etc. shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral body; it may be a mechanical connection, an electrical connection, or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication between two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The above has described the present utility model by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present utility model is not limited by the above methods. As long as various improvements are made by adopting the method concept and technical solution of the present utility model, or directly applied to other occasions without improvement, they are all within the protection scope of the present utility model.

Claims

1. A new type of PPS high temperature material gear injection mold, characterized in that: The invention comprises an upper mold body (2), a lower mold body (3), a lower mold base (4), a pouring mechanism (8) and an ejection mechanism (5); the top of the upper mold body (2) is connected to an upper mold cover (1); the upper mold body (2) comprises an upper mold upper plate (21), an upper mold middle plate (22) and an upper mold lower plate (23); the pouring mechanism (8) extends from the upper mold cover (1) into the upper mold body (2); the pouring mechanism (8) is divided into four pouring points in the upper mold body (2); the pouring mechanism (8) extends to four upper mold cores (9) of the upper mold lower plate (23); a shaping gear sleeve (10) is arranged in the upper mold core (9); a gear is integrally connected to the top of the shaping gear sleeve (10); a shaping sleeve (11) is fixedly connected to the inner wall of the shaping gear sleeve (10); the lower mold body (3) abuts against the upper mold body The lower mold body (2) is supported on the lower mold base (4), the upper mold body (2), the lower mold body (3) and the lower mold base (4) are movably connected by a sliding lock (6), a circulating cooling system (7) is arranged in the upper mold body (2) and the lower mold body (3), an ejection mechanism (5) is arranged below the lower mold body (3) on the inner side of the lower mold base (4), and the ejector pin (52) of the ejection mechanism (5) is pressed against the bottom of the lower mold core, a rifling rod (13) is arranged between the lower mold body (3) and the upper mold lower plate (23), a gear sleeve (12) is threadedly connected to the rifling rod (13), the gear sleeve (12) is rotatably clamped on the upper mold lower plate (23) through a bearing, and the gear on the gear sleeve (12) is meshed with the gears on the four fixed gear sleeves (10).

2. A new type of PPS high temperature material gear injection mold according to claim 1, characterized in that: The pouring mechanism (8) comprises a pouring port (81), a pouring pipe (82), a pouring branch pipe (83), a pouring head (84) and a pouring head pipe (85); the pouring port (81) is connected to a pouring pipe (82) arranged in the upper plate (21) of the upper mold; the pouring pipe (82) is divided into four pouring branch pipes (83); the bottom end of the pouring branch pipe (83) is connected to the pouring head (84); the pouring head (84) is arranged in the middle supporting plate (22) of the upper mold; a plurality of pouring head pipes (85) are obliquely connected to the pouring head (84); the bottom end of the pouring head pipe (85) extends to the top of the oblique tooth part of the product (14).

3. A new type of PPS high temperature material gear injection mold according to claim 2, characterized in that: The lower die base (4) comprises a lower die base bottom plate (43), a lower die base support plate (42) and a lower die base top plate (41); the lower die base support plate (42) is fixed on the lower die base bottom plate (43), and the lower die base top plate (41) is fixed on the lower die base support plate (42).

4. The new PPS high temperature material gear injection mold according to claim 3 is characterized in that: The ejection mechanism (5) comprises an ejection base plate (51), an ejector pin fixing plate (53), an ejection support column (54), an ejection spring (55) and an ejector pin (52); the ejector pin fixing plate (53) is arranged on the ejection base plate (51); the ejection support column (54) is arranged at four corners of the ejector pin fixing plate (53) and passes through the lower die base top plate (41); the ejection spring (55) is sleeved on the ejection support column (54); the ejector pin (52) is arranged on the ejector pin fixing plate (53) and extends upward to the bottom of the product (14).

5. The new PPS high temperature material gear injection mold according to claim 4 is characterized in that: The sliding lock (6) comprises an upper sliding plate (61) and a lower fixed plate (64), wherein the lower fixed plate (64) is fixed on the lower mold base support plate (42), and the upper sliding plate (61) is half-wrapped and slidably sleeved on the lower fixed plate (64). The upper inner part and the middle part of the upper sliding plate (61) are respectively provided with a first connecting block (62) and a second connecting block (63), wherein the first connecting block (62) is connected to the side wall of the upper mold upper plate (21), and the second connecting block (63) is connected to the side wall of the upper mold lower plate (23).

Images