High-precision injection mold and injection molding process thereof

Abstract

The invention relates to the field of injection molds, in particular to an injection molding process of a high-precision injection mold. The injection molding process comprises the following steps that injection molding materials are injected into an inlet runner in the center of a runner table, and the injection molding materials are injected into a cross-shaped flash groove through the inlet runner; injection molding materials are injected into the cross-shaped overflow groove until the cross-shaped overflow groove is full, the full injection molding materials sequentially overflow towards the outer side of the injection molding hole site to enter the space between the injection molding column and the injection molding hole site and flow down to the injection molding bottom groove of the lower mold plate, and meanwhile redundant injection molding materials are discharged; and after injection molding and cooling are completed, the upper mold plate ascends to drive the middle mold plate to ascend, and the plastic pipe is taken out. The invention provides an injection mold and an injection molding process thereof, and effectively solves the problems that the processing efficiency is low and the processing cost is increased due to the fact that only one plastic pipe part can be processed by an existing mold.

Description

Technical Field

[0001] The invention relates to the field of injection molds, and in particular to a high-precision injection mold and an injection molding process thereof. Background Art

[0002] Injection molding, also known as injection molding, is a molding method that combines injection and molding. The advantages of the injection molding method are fast production speed, high efficiency, automated operation, a wide variety of colors, shapes from simple to complex, sizes from large to small, and precise product size. The product is easy to update and can be made into parts with complex shapes. Injection molding is suitable for mass production and molding and processing fields such as products with complex shapes. At a certain temperature, the completely molten plastic material is stirred by a screw, injected into the mold cavity with high pressure, and cooled and solidified to obtain a molded product.

[0003] Some existing plastic pipe injection molds generally only have a single processing hole for injection molding production, so that only one plastic pipe component can be processed, resulting in low processing efficiency and increased processing costs, which does not meet current processing needs. Summary of the invention

[0004] Based on this, the purpose of the present invention is to provide a high-precision injection mold and its injection molding process, which effectively solves the problem that the existing mold can only process one plastic pipe component, resulting in low processing efficiency and increased processing costs.

[0005] The present invention adopts the following technical solution:

[0006] An injection molding process of a high-precision injection mold, the injection molding process includes an injection mold, the injection mold includes an upper mold plate, a middle mold plate, and a lower mold plate which are stacked in sequence; a plurality of injection molding columns are distributed on the bottom of the upper mold plate, a flow channel platform is provided in the center of the upper mold plate, and an inlet flow channel is provided in the center of the flow channel platform; a plurality of injection molding holes are provided on the middle mold plate, the injection molding holes are matched with the injection molding columns, and a cross overflow groove is provided in the middle of the middle mold plate; a plurality of injection molding bottom grooves are provided on the upper surface of the lower mold plate, and the injection molding bottom grooves are matched with the bottom of the injection molding columns;

[0007] The injection molding process comprises the following steps:

[0008] S1, inject the injection plastic into the inlet runner in the center of the runner table, and the injection plastic is injected into the cross overflow trough through the inlet runner;

[0009] S2, the injection plastic is injected into the cross overflow groove until it is full, and the full injection plastic overflows to the outside of the injection hole in turn into the space between the injection column and the injection hole, and flows down to the injection bottom groove of the lower template, and the excess injection plastic is discharged at the same time;

[0010] S3. After injection molding is completed and cooled, the upper mold plate rises, driving the middle mold plate to rise, and the plastic tube is taken out.

[0011] A further improvement to the above technical solution is that the inlet flow channel is connected to the upper template and the middle template in sequence.

[0012] A further improvement to the above technical solution is that guide columns are respectively connected to both sides of the runner platform, and the guide columns pass through the upper template and are movably connected to the middle template and the lower template in sequence.

[0013] A further improvement to the above technical solution is that first through holes are opened on both sides of the guide column, the number of the first through holes is set to four, and the four first through holes are respectively distributed and connected to the upper template.

[0014] A further improvement to the above technical solution is that the cross overflow groove is connected to the inlet flow channel; a hole overflow groove is provided on the outside of the injection hole, and the hole overflow groove is provided outside the cross overflow groove.

[0015] A further improvement to the above technical solution is that a plurality of overflow grooves are provided at the outer edge of the middle template, a plurality of the overflow grooves are provided inside with second through holes, the number of the second through holes is set to four, and a first guide hole is provided between two adjacent second through holes.

[0016] A further improvement to the above technical solution is that a lifting connection component is passed through the second through hole, and the lower part of the lifting connection component is connected to the lower template; the number of the lifting connection components is set to four, and the lifting connection component includes a nut connecting column and a lifting spring; the bottom of the nut connecting column is provided with an installation thread, and the lifting spring is wound around the outer side of the nut connecting column.

[0017] A further improvement to the above technical solution is that the number of the first guide holes is set to two, the two first guide holes are arranged opposite to each other, and the first guide holes are movably connected to the guide column.

[0018] A further improvement to the above technical solution is that the lower template is provided with a third through hole on the outside of the plurality of injection bottom grooves, the number of the third through holes is set to four, a second guide hole is provided between two adjacent third through holes, and the inside of the third through hole is connected to the mounting thread.

[0019] A further improvement to the above technical solution is that a bottom overflow groove is provided on the outer side of the injection molding bottom groove.

[0020] The beneficial effects of the present invention are:

[0021] The overall design of the present invention is reasonable, and multi-hole processing can be realized, and multiple products can be produced at the same time, which effectively improves processing efficiency and reduces processing costs. When working, the injection plastic is injected into the inlet flow channel in the center of the flow channel platform, and the injection plastic is injected into the cross overflow groove through the inlet flow channel; the injection plastic is injected into the cross overflow groove until it is full, and the full injection plastic overflows to the overflow groove of the hole position outside the injection molding hole position in turn into between the injection molding column and the injection molding hole position, and flows down to the injection molding bottom groove of the lower template for shaping, and at the same time, the excess injection plastic is discharged through the external overflow groove; after the injection molding is completed and cooled, the upper template rises, and under the action of the lifting spring of the lifting connection component, the middle template is driven to rise, and the plastic tube is taken out. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a principle block diagram of the injection molding process of the present invention;

[0023] Figure 2 It is a structural schematic diagram of the injection mold of the present invention;

[0024] Figure 3 for Figure 2 Schematic diagram of the separation structure of the upper template, the middle template and the lower template of the injection mold;

[0025] Figure 4 for Figure 2 Exploded view of the injection mold;

[0026] Figure 5 for Figure 2 A schematic structural diagram of a middle template of an injection mold;

[0027] Figure 6 for Figure 2 A schematic diagram of the structure of the lower template and the jacking connection component of the injection mold.

[0028] The numbers in the figure are:

[0029] 10. Injection mold; 20. Upper template; 21. Injection column; 22. Runner platform; 23. Inlet runner; 24. Guide column; 25. First perforation; 30. Middle template; 31. Injection hole; 32. Cross overflow groove; 33. Hole overflow groove; 34. External overflow groove; 35. Second perforation; 36. First guide hole; 40. Lower template; 41. Injection bottom groove; 42. Third perforation; 43. Second guide hole; 44. Bottom overflow groove; 50. Lifting connection assembly; 51. Nut connecting column; 52. Lifting spring; 53. Installation thread. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of the present invention, it should be noted that the terms "vertical direction", "up", "down", "horizontal", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are 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, and therefore cannot be understood as limiting the present invention. In addition, "first", "second", "third", and "fourth" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0032] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection, it can be a mechanical connection, it can be an electrical connection, it can be a direct connection, it can be connected through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] like Figures 1 to 6 As shown, an embodiment of the present invention relates to an injection molding process of a high-precision injection mold, the injection molding process includes an injection mold 10, the injection mold 10 includes an upper mold plate 20, a middle mold plate 30, and a lower mold plate 40 which are stacked in sequence; a plurality of injection molding columns 21 are distributed at the bottom of the upper mold plate 20, a flow channel platform 22 is provided in the center of the upper mold plate 20, and an inlet flow channel 23 is provided in the center of the flow channel platform 22; a plurality of injection molding holes 31 are provided in the middle mold plate 30, the injection molding holes 31 are matched with the injection molding columns 21, and a cross overflow groove 32 is provided in the middle of the middle mold plate 30; a plurality of injection molding bottom grooves 41 are provided on the upper surface of the lower mold plate 40, and the injection molding bottom grooves 41 are matched with the bottom of the injection molding columns 21;

[0034] The injection molding process comprises the following steps:

[0035] S1, injecting the injection plastic into the inlet flow channel 23 in the center of the flow channel platform 22, and the injection plastic is injected into the cross overflow groove 32 through the inlet flow channel 23;

[0036] S2, the injection plastic is injected into the cross overflow groove 32 until it is full, and the full injection plastic overflows to the outside of the injection hole 31 in sequence into the space between the injection column 21 and the injection hole 31, and flows down to the injection bottom groove 41 of the lower template 40, and the excess injection plastic is discharged;

[0037] S3. After the injection molding is completed and cooled, the upper mold plate 20 rises, driving the middle mold plate 30 to rise, and the plastic tube is taken out.

[0038] Further, the inlet flow channel 23 is sequentially connected to the upper mold plate 20 and the middle mold plate 30. Specifically, the injection molding material enters the upper mold plate 20 and the middle mold plate 30 through the inlet flow channel 23, so as to realize the injection molding process, which is highly practical.

[0039] Furthermore, guide posts 24 are connected to both sides of the runner platform 22, and the guide posts 24 pass through the upper template 20 and are movably connected to the middle template 30 and the lower template 40 in sequence. Specifically, the guide posts 24 are provided so that the upper template 20 and the middle template 30 can be separated or closed in sequence to ensure the discharge and improve the efficiency.

[0040] Furthermore, first through holes 25 are provided on both sides of the guide column 24, and the number of the first through holes 25 is set to four, and the four first through holes 25 are respectively distributed and connected to the upper template 20. Specifically, the first through holes 25 are provided to facilitate the passage of the nut connection column 51 of the jacking connection assembly 50, so that the upper template 20, the middle template 30, and the lower template 40 are molded in sequence, thereby improving processing efficiency.

[0041] Furthermore, the cross overflow groove 32 is connected to the inlet flow channel 23; the outer side of the injection hole 31 is provided with a hole overflow groove 33, and the hole overflow groove 33 is arranged outside the cross overflow groove 32. Specifically, the injection material is injected into the cross overflow groove 32 through the inlet flow channel 23, and overflows to between the injection column 21 and the injection hole 31 through the hole overflow groove 33, completing the injection, ensuring multi-hole production, and improving efficiency.

[0042] Furthermore, the outer edge of the middle template 30 is provided with a plurality of overflow grooves 34, and a plurality of the overflow grooves 34 are provided with second perforations 35 inside. The number of the second perforations 35 is set to four, and a first guide hole 36 is provided between two adjacent second perforations 35. Specifically, the overflow grooves 34 are provided to facilitate the discharge of excess injection plastic through the overflow grooves 34, thereby ensuring consistent product quality, and at the same time, the excess injection plastic can be recycled to reduce processing costs; the second perforations 35 are provided to facilitate the passage of the nut connection column 51 of the jacking connection assembly 50, so that the upper template 20, the middle template 30, and the lower template 40 are molded in sequence, thereby improving processing efficiency.

[0043] Furthermore, the second through hole 35 is penetrated by a lifting connection component 50, and the lower part of the lifting connection component 50 is connected to the lower template 40; the number of the lifting connection components 50 is set to four, and the lifting connection component 50 includes a nut connection column 51 and a lifting spring 52; the bottom of the nut connection column 51 is provided with a mounting thread 53, and the lifting spring 52 is wound around the outer side of the nut connection column 51. Specifically, the nut connection column 51 is provided to sequentially connect the third through hole 42, the second through hole 35, and the first through hole 25, so as to effectively connect the middle template 30 and the lower template 40; the lifting spring 52 is provided to effectively separate the middle template 30 from the lower template 40 during discharging, thereby improving the discharging efficiency.

[0044] Further, the number of the first guide holes 36 is set to two, the two first guide holes 36 are arranged opposite to each other, and the first guide holes 36 are movably connected to the guide posts 24. Specifically, the guide posts 24 pass through the first guide holes 36 so that the upper template 20 can move.

[0045] Furthermore, the lower template 40 is provided with third through holes 42 located outside the plurality of injection bottom grooves 41, the number of the third through holes 42 is set to four, a second guide hole 43 is provided between two adjacent third through holes 42, and the interior of the third through hole 42 is connected to the mounting thread 53. Specifically, the third through hole 42 is provided to facilitate the passage of the nut connection column 51 of the jacking connection assembly 50, so that the upper template 20, the middle template 30, and the lower template 40 can be molded in sequence, thereby improving the processing efficiency; the second guide hole 43 is provided to facilitate the guide column 24 to move in the first guide hole 36 and the second guide hole 43 in sequence, so that the upper template 20 is separated from the middle template 30 for material discharge.

[0046] Furthermore, a bottom overflow groove 44 is provided on the outer side of the injection bottom groove 41. Specifically, the bottom overflow groove 44 is provided to store the excess injection plastic and facilitate shaping of one end of the plastic tube to ensure the shape of the product and improve efficiency.

[0047] The overall design of the present invention is reasonable, and multi-hole processing can be realized, and multiple products can be produced at the same time, which effectively improves processing efficiency and reduces processing costs. When working, the injection plastic is injected into the inlet flow channel 23 in the center of the flow channel platform 22, and the injection plastic is injected into the cross overflow groove 32 through the inlet flow channel 23; the injection plastic is injected into the cross overflow groove 32 until it is full, and the full injection plastic overflows to the overflow groove 33 of the hole outside the injection molding hole 31 in turn into between the injection molding column 21 and the injection molding hole 31, and flows down to the injection molding bottom groove 41 of the lower template 40 for shaping, and at the same time, the excess injection plastic is discharged through the external overflow groove 34; after the injection molding is completed and cooled, the upper template 20 rises, and under the action of the lifting spring 52 of the lifting connection component 50, the middle template 30 is driven to rise, and the plastic tube is taken out.

[0048] The above only expresses the preferred technical solution of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the invention patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, and the present invention is also intended to include these modifications and modifications.

Claims

1. An injection molding process for a high-precision injection mold, characterized in that: The injection molding process includes an injection mold, and the injection mold includes an upper mold plate, a middle mold plate, and a lower mold plate which are stacked in sequence; a plurality of injection molding columns are distributed on the bottom of the upper mold plate, a runner platform is provided in the center of the upper mold plate, and an inlet runner is provided in the center of the runner platform; a plurality of injection molding holes are provided on the middle mold plate, and the injection molding holes are matched with the injection molding columns, and a cross overflow groove is provided in the middle of the middle mold plate; a plurality of injection molding bottom grooves are provided on the upper surface of the lower mold plate, and the injection molding bottom grooves are matched with the bottom of the injection molding columns; The injection molding process comprises the following steps: S1, inject the injection plastic into the inlet runner in the center of the runner table, and the injection plastic is injected into the cross overflow trough through the inlet runner; S2, the injection plastic is injected into the cross overflow groove until it is full, and the full injection plastic overflows to the outside of the injection hole in turn into the space between the injection column and the injection hole, and flows down to the injection bottom groove of the lower template, and the excess injection plastic is discharged at the same time; S3. After injection molding is completed and cooled, the upper mold plate rises, driving the middle mold plate to rise, and the plastic tube is taken out.

2. The injection molding process of the high-precision injection mold according to claim 1, characterized in that: The inlet flow channel is connected to the upper mold plate and the middle mold plate in sequence.

3. The injection molding process of the high-precision injection mold according to claim 1, characterized in that: Guide columns are respectively connected to both sides of the runner platform, and the guide columns pass through the upper template and are movably connected to the middle template and the lower template in sequence.

4. The injection molding process of the high-precision injection mold according to claim 3 is characterized in that: First through holes are formed on both sides of the guide column. The number of the first through holes is set to four, and the four first through holes are respectively distributed and connected to the upper template.

5. The injection molding process of the high-precision injection mold according to claim 1, characterized in that: The cross overflow groove is connected to the inlet flow channel; the outer side of the injection hole is provided with a hole overflow groove, and the hole overflow groove is arranged outside the cross overflow groove.

6. The injection molding process of the high-precision injection mold according to claim 1, characterized in that: A plurality of overflow grooves are formed on the outer edge of the middle template, and second through holes are formed inside the plurality of overflow grooves. The number of the second through holes is set to four, and a first guide hole is formed between two adjacent second through holes.

7. The injection molding process of the high-precision injection mold according to claim 6, characterized in that: The second through hole is penetrated by a lifting connection component, and the lower part of the lifting connection component is connected to the lower template; the number of the lifting connection components is set to four, and the lifting connection component includes a nut connecting column and a lifting spring; the bottom of the nut connecting column is provided with an installation thread, and the lifting spring is wound around the outer side of the nut connecting column.

8. The injection molding process of the high-precision injection mold according to claim 6, characterized in that: The number of the first guide holes is set to two, the two first guide holes are arranged opposite to each other, and the first guide holes are movably connected to the guide column.

9. The injection molding process of the high-precision injection mold according to claim 1, characterized in that: The lower template is provided with third through holes on the outer sides of the plurality of injection bottom grooves. The number of the third through holes is set to four. A second guide hole is provided between two adjacent third through holes. The inside of the third through holes is connected with the mounting thread.

10. The injection molding process of the high-precision injection mold according to claim 1, characterized in that: A bottom overflow groove is arranged on the outer side of the injection molding bottom groove.

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