Machining error automatic compensation structure of mold hot runner system

Abstract

The invention provides a machining error automatic compensation structure of a mold hot runner system, and belongs to the technical field of mold manufacturing. The hot runner system solves the problem of glue leakage caused by machining errors after the hot runner system is assembled. The compensation structure comprises a runner cylinder with a concave cavity in the lower end face, the inner surface of the concave cavity is an inner spherical surface, and a hemispherical compensation block which can rotate along the inner spherical surface and is provided with a through hole is arranged in the concave cavity. A limiting structure which is used for limiting the compensation block to be separated from the concave cavity and does not influence the compensation block to slightly rotate along the inner spherical surface in any direction is further arranged on the runner column body, part of the compensation block protrudes out of the concave cavity, and the end face of the protruding part is a straight matching surface II; and the matching surface II is tightly attached to the matching surface I, so that the nozzle main body is communicated with the runner column body through the through hole. Through the design, the machining error can be well and automatically compensated and adjusted, so that the matching surface between the splitter plate and the nozzle main body is not influenced by the machining error and is always kept in tight fit.

Description

Technical Field

[0001] The invention belongs to the technical field of mold manufacturing and relates to an automatic compensation structure for machining errors of a mold hot runner system. Background Art

[0002] The hot runner system is an advanced pouring system for mold injection molding, which can keep the raw materials in the appropriate melting temperature range at all times, thereby avoiding the generation of cold material waste. It not only solves the problem of raw material waste, but also solves the problem of automation of injection molding. Hot runner nozzles are divided into open and needle valve types according to the different sealing forms of the nozzle type. The so-called open type means that there is no valve needle for actively closing the gate for sealing. The closure of the gate mainly relies on the front gate to produce a small section of cold material plug after the injection molding is completed to block the outflow of the molten plastic at the rear end. The completion of this transformation requires factors such as appropriate mold temperature and cooling water channel position. Various problems will arise for engineering plastics and heat-sensitive plastics that are difficult to injection mold. Needle valve nozzles came into being to address this problem. For example, the hot runner pneumatic needle valve single nozzle for injection molding disclosed in Chinese patent document CN2638963Y has a valve needle for sealing inside the gate. The movement of the valve needle matches the operation of the injection molding machine and realizes reciprocating motion according to different injection molding signals, that is, the valve needle can be opened and closed.

[0003] The needle valve nozzle solves the above problems of the open nozzle, but the needle valve nozzle structure is more complicated than the open one. During the installation process, it takes a long time to install and debug because of the complex structure and many parts. In particular, the nozzle and the manifold of the existing needle valve system adopt a stacked sliding combination matching method. This matching method relies on the accurate fit of the surface and has high requirements for both mold processing and hot runner processing. If either of the two does not meet the requirements, leakage will occur. Leakage is undoubtedly a catastrophic trouble for injection molding. Leakage will cause environmental pollution, reduce production efficiency, increase maintenance costs, and other problems. However, in the existing mold manufacturing process, the machining errors of the manifold and the nozzle matching surface are difficult to avoid, which leads to the hidden danger of glue leakage in the assembled mold hot runner system due to the influence of the above errors. Summary of the invention

[0004] The purpose of the present invention is to address the above-mentioned problems in the prior art and to propose an automatic compensation structure for machining errors of a mold hot runner system. The technical problem to be solved by the present invention is how to avoid glue leakage due to machining errors after the hot runner system is assembled.

[0005] The purpose of the present invention can be achieved through the following technical solutions: an automatic compensation structure for machining errors of a mold hot runner system, the mold hot runner system comprises a manifold and a nozzle body respectively fixed in the mold body, the nozzle body has a straight mating surface at one end facing the manifold, and is characterized in that the automatic compensation structure for machining errors comprises a columnar flow channel column fixed in the manifold and used for conveying raw materials, the lower end surface of the flow channel column is provided with an inwardly concave and hemispherical concave cavity, the inner surface of the concave cavity is An inner spherical surface facing the mating surface one, a compensation block with a hemispherical shape and capable of rotating along the inner spherical surface is arranged in the concave cavity, the compensation block has a through hole that penetrates along the axial direction, and the flow channel column is also provided with a limiting structure for limiting the compensation block from escaping from the concave cavity, and the limiting structure does not affect the small rotation of the compensation block along the inner spherical surface in any direction, part of the compensation block protrudes from the concave cavity and the end face of the protruding part is a straight mating surface two, the mating surface two is tightly fitted with the mating surface one and the nozzle body and the flow channel column are connected through the above-mentioned through hole.

[0006] The hot runner system of the mold follows the existing assembly method of overlapping the manifold and the nozzle body, and innovatively designs an automatic compensation structure for machining errors to ensure that the mating surface between the manifold and the nozzle body is not affected by the machining errors. The compensation effect of the compensation structure is used to keep the mating surfaces tightly fitted at all times, thereby solving the technical problem of potential glue leakage caused by machining errors. Specifically, the automatic compensation structure for machining errors includes a columnar flow channel column that is fixedly connected to the manifold and used to transport raw materials. An inwardly concave and hemispherical cavity is opened on the lower end face of the flow channel column, and the inner surface of the cavity is designed to be an inner spherical surface facing the mating surface. A hemispherical compensation block is then arranged in the cavity, and the compensation block is limited by a limiting structure. The compensation block is limited in the concave cavity, but the limiting structure does not affect the small rotational movement of the compensation block along the inner spherical surface in any direction. At the same time, the compensation block is provided with a through hole that penetrates along the axial direction and partially protrudes from the concave cavity. The end face of the protruding part is a straight mating surface 2. The mating surface 2 is used to overlap and fit with the mating surface 1. After such a design, when there are machining errors between the mating surface 1 and the mating surface 2, especially machining angle errors, the compensation block can make a small rotational movement in any direction along the inner spherical surface. Then, after the rotation adjustment of the compensation block, the mating surface 2 can always fit tightly with the mating surface 1. Then, the locking diverter plate can realize its overlapping and fitting assembly with the nozzle body, ensuring that there will be no glue leakage when the nozzle body and the flow channel column are connected through the above-mentioned through hole. In the above-mentioned assembly process, the inner spherical surface in the concave cavity not only provides guidance for the rotation adjustment of the compensation block, but also plays a role in pressing the compensation block when the diverter plate is locked and the mating surface 2 is pressed tightly against the mating surface 1, so that the locking force of the diverter plate can be well transmitted to the compensation block. Therefore, the above automatic compensation structure for machining errors can effectively avoid the problem of glue leakage due to machining errors after the mold hot runner system is assembled.

[0007] In the above-mentioned automatic compensation structure for machining errors of the mold hot runner system, the limiting structure includes limiting screws fixedly connected to both sides of the runner column and arranged radially, and limiting holes opened on both sides of the outer surface of the compensation block and corresponding to the limiting screws, and part of the studs of the limiting screws extend into the corresponding limiting holes, and the aperture of the limiting hole is larger than the outer diameter of the studs of the limiting screws. Through the limiting structure designed above, since the aperture of the limiting hole is larger than the outer diameter of the studs of the limiting screws, there is a gap between the two when part of the studs of the limiting screws extend into the corresponding limiting holes, which not only ensures that the compensation block will not fall out of the concave cavity, but also does not affect the small rotation movement of the compensation block along the inner spherical surface in any direction, thereby ensuring that the compensation block can realize the function of error compensation, so that the mating surface one and the mating surface two can always fit tightly, thereby avoiding the problem of glue leakage due to the existence of machining errors after the mold hot runner system is assembled.

[0008] In the automatic compensation structure for machining errors of the above-mentioned hot runner system of the mold, the runner column includes a cylindrical main body and a connecting section located at the upper end of the main body, the manifold has mounting hole 1 and mounting hole 2, a stop shoulder is provided between the mounting hole 1 and the mounting hole 2, the connecting section is threadedly connected to the mounting hole 1, and the upper end of the main body abuts against the stop shoulder. The design of the above-mentioned connecting section enables the runner column to be reliably fixed to the manifold, and at the same time, the design of the above-mentioned stop shoulder enables the locking force generated when the manifold is fixed to the mold body to be well transmitted to the runner column through the stop shoulder, and then transmitted to the compensation block by the runner column, which is conducive to ensuring the close fit between the mating surface 1 and the mating surface 2, thereby avoiding the problem of glue leakage due to the existence of machining errors after the hot runner system of the mold is assembled.

[0009] In the above-mentioned automatic compensation structure for machining errors of the hot runner system of the mold, the lower end of the runner column has a flange, the concave cavity is provided on the end face of the flange, and a gap is formed between the flange and the first mating surface. Through the above design, on the one hand, the gap does not affect the compensation block to perform compensatory rotation adjustment; on the other hand, when the manifold is locked, the gap can be nearly closed after the second mating surface and the first mating surface are closely fitted, so that the cooperation between the end face of the flange and the first mating surface can further improve the anti-leakage effect here.

[0010] In the above-mentioned automatic compensation structure for machining errors of the mold hot runner system, one side of the diverter plate has a side mounting hole radially opened along the runner column, a positioning hole one with a D-shaped cross section is provided at the bottom of the side mounting hole, a positioning hole two is provided at the bottom of the positioning hole one, radial holes arranged along the radial direction are provided on the outer peripheral surface of the runner column, the positioning hole two and the radial hole have the same aperture, a positioning rod is inserted in the positioning hole two, the inner end of the positioning rod is inserted into the radial hole and tightly fits with the radial hole, the outer end of the positioning rod has a positioning cap with a D-shaped cross section, the positioning cap is located in the positioning hole one and forms a circumferential positioning, a fixing screw plug is threadedly connected to the side mounting hole, and the inner end of the fixing screw plug abuts against the positioning cap. Through the design of the above positioning rods and related positioning holes, especially the radial arrangement of the positioning rods and the D-type anti-rotation design of the positioning caps, the runner column can be better connected closely with the manifold, so that the locking force generated by the manifold can be better transmitted to the compensation block through the inner spherical surface on the runner column, which is conducive to ensuring a closer fit between the mating surface one and the mating surface two, thereby avoiding the problem of glue leakage due to the existence of processing errors after the mold hot runner system is assembled.

[0011] In the above-mentioned automatic compensation structure for machining errors of the mold hot runner system, the center of the mating surface 1 has an input hole, the through hole is opened at the center of the mating surface 2, and the aperture of the through hole is consistent with the aperture of the input hole. Through the above design, when the mating surfaces 1 and 2 are fitted together, since the above-mentioned two holes are both in the center and have the same aperture, the misalignment area of ​​the two holes is minimized, thereby ensuring the maximum contact area of ​​the mating surfaces 1 and 2, which is conducive to improving the anti-leakage effect.

[0012] In the automatic compensation structure for machining errors of the mold hot runner system, a flow channel hole is provided at the bottom center of the cavity, and the through hole is provided at the center of the second mating surface, and the diameter of the flow channel hole is consistent with the diameter of the through hole. Through the above design, when the first and second mating surfaces are fitted together, since the two holes are both in the center and have the same diameter, the misalignment area of ​​the two holes is minimized, thereby reducing the risk of glue leakage between the compensation block and the flow channel column, which is beneficial to improving the anti-leakage effect.

[0013] In the above-mentioned automatic compensation structure for machining errors of the mold hot runner system, the diverter plate is arranged obliquely in the mold body, the diverter plate is fixedly connected to the mold body by a locking screw, and a pad is provided between the lower side of the diverter plate and the mold body, and the pad is sleeved on the locking screw. Through the above pad design, the diverter plate can be more reliably fixed to the mold body, thereby providing a more reliable locking force for the compensation block, which is conducive to ensuring a tighter fit between the mating surface 1 and the mating surface 2, and improving the anti-leakage effect.

[0014] In the automatic compensation structure for machining errors of the mold hot runner system, a positioning block is further provided between the lower side of the manifold and the mold body, one end of the positioning block is fixedly connected to the lower side of the manifold, and the other end is embedded in the mold body. Through the design of the positioning block, the manifold can be more stably connected to the mold body, thereby providing a more reliable locking force for the compensation block, which is conducive to ensuring a tighter fit between the mating surface 1 and the mating surface 2, and improving the anti-leakage effect.

[0015] As an alternative, in the automatic compensation structure for machining errors of the above-mentioned mold hot runner system, the limiting structure includes through holes that radially penetrate the runner column and are located on both sides of the lower end of the runner column, and each of the through holes is provided with a limiting column, the inner end of the limiting column extends into the concave cavity and is threadedly connected to the compensation block, and the outer diameter of the limiting column is smaller than the aperture of the through hole. With the limiting structure designed as above, since the outer diameter of the limiting column is smaller than the aperture of the through hole, there is a gap between the limiting column and the corresponding through hole when the limiting column is located in the through hole, which ensures that the compensation block will not fall out of the concave cavity, and does not affect the small rotational movement of the compensation block in any direction along the inner spherical surface, thereby ensuring that the compensation block can realize the error compensation function, so that the mating surface one and the mating surface two can always fit tightly, thereby avoiding the problem of glue leakage due to the existence of machining errors after the mold hot runner system is assembled.

[0016] Compared with the prior art, the automatic compensation structure for machining errors of the mold hot runner system has the following advantages: the design structure of the automatic compensation structure for machining errors is ingenious and reasonable, and can perform good automatic compensation adjustment for machining errors, so that the mating surface between the manifold and the nozzle body is not affected by the machining errors and always maintains a tight fit, which completely solves the problem of glue leakage in the mold hot runner system due to machining errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a cross-sectional view of the overall structure of the hot runner system of this mold.

[0018] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0019] Figure 3 It is a schematic diagram of the exploded structure of the flow channel column and the compensation block in the automatic compensation structure for machining errors.

[0020] In the figure, 1, mold body; 2, manifold; 21, mounting hole one; 22, mounting hole two; 23, shoulder; 24, side mounting hole; 25, positioning hole one; 26, positioning hole two; 3, nozzle body; 3a, mating surface one; 3b, input hole; 4, flow channel column; 4a, concave cavity; 4a1, inner spherical surface; 4b, radial hole; 4c, flow channel hole; 41, main body; 42, connecting section; 43, flange; 5, compensation block; 5a, mating surface two; 51, through hole; 52, limit hole; 6, limit screw; 7, gap; 8, positioning rod; 81, positioning cap; 9, fixing screw plug; 10, locking screw; 11, spacer; 12, positioning block; 13, cylinder; 14, valve needle. DETAILED DESCRIPTION

[0021] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0022] Embodiment 1:

[0023] Specifically, if Figure 1 As shown, the mold includes a mold body 1, and the mold hot runner system includes a valve needle 14, a cylinder 13, a manifold 2 and a nozzle body 3 respectively fixed in the mold body 1. The manifold 2 is arranged obliquely in the mold body 1 and is fixed to the mold body 1 through a locking screw 10. A cushion block 11 is provided between the lower side of the manifold 2 and the mold body 1, and the cushion block 11 is sleeved on the locking screw 10. A positioning block 12 is also provided between the lower side of the manifold 2 and the mold body 1, and one end of the positioning block 12 is fixedly connected to the lower side of the manifold 2, and the other end is embedded in the mold body 1.

[0024] For example Figure 2 and Figure 3 As shown, the end of the nozzle body 3 facing the diverter plate 2 has a straight mating surface 3a, and the automatic compensation structure for machining errors includes a columnar flow channel column 4 fixedly connected in the diverter plate 2 and used for conveying raw materials. A concave cavity 4a that is recessed inward and has a hemispherical shape is provided on the lower end face of the flow channel column 4. The inner surface of the concave cavity 4a is an inner spherical surface 4a1 facing the mating surface 3a. A compensation block 5 that is hemispherical and can rotate along the inner spherical surface 4a1 is provided in the concave cavity 4a. The compensation block 5 has a through hole 51 that passes through the axial direction. A limiting structure for limiting the compensation block 5 from escaping from the concave cavity 4a is also provided on the flow channel column 4, and the limiting structure does not affect the small rotation of the compensation block 5 along the inner spherical surface 4a1 in any direction. Part of the compensation block 5 protrudes from the concave cavity 4a and the end face of the protruding portion is a straight mating surface 2 5a. An input hole 3b is provided at the center of the mating surface 1 3a. A through hole 51 is located at the center of the mating surface 2 5a, and the aperture of the through hole 51 is consistent with the aperture of the input hole 3b. A flow channel hole 4c is provided at the bottom center of the concave cavity 4a, and the aperture of the flow channel hole 4c is consistent with the aperture of the through hole 51. The mating surface 2 5a is tightly fitted with the mating surface 1 3a, and the nozzle body 3 is connected with the flow channel column 4 through the above-mentioned through hole 51.

[0025] More specifically, in this embodiment, if Figure 2 and Figure 3As shown, the above-mentioned limiting structure includes limiting screws 6 fixedly connected to both sides of the flow channel column 4 and arranged in the radial direction, and limiting holes 52 opened on both sides of the outer surface of the compensation block 5 and corresponding to the limiting screws 6. Part of the studs of the limiting screws 6 extend into the corresponding limiting holes 52, and the diameter of the limiting holes 52 is larger than the outer diameter of the studs of the limiting screws 6. The flow channel column 4 includes a cylindrical main body 41 and a connecting section 42 located at the upper end of the main body 41. The diverter plate 2 has a mounting hole 1 21 and a mounting hole 22. There is a shoulder 23 between the mounting hole 1 21 and the mounting hole 22. The connecting section 42 is threadedly connected to the mounting hole 1 21, and the upper end of the main body 41 abuts against the shoulder 23. The lower end of the flow channel column 4 has a flange portion 43, and the concave cavity 4a is opened on the end surface of the flange portion 43. A gap 7 is formed between the flange portion 43 and the matching surface 1 3a. One side of the diverter plate 2 has a side mounting hole 24 radially opened along the flow channel column 4, a positioning hole 25 with a D-shaped cross section is provided at the bottom of the side mounting hole 24, a positioning hole 26 is provided at the bottom of the positioning hole 25, and radial holes 4b arranged along the radial direction are provided on the outer peripheral surface of the flow channel column 4, the apertures of the positioning hole 26 and the radial hole 4b are consistent, a positioning rod 8 is inserted in the positioning hole 26, the inner end of the positioning rod 8 is inserted into the radial hole 4b and tightly fits with the radial hole 4b, the outer end of the positioning rod 8 has a positioning cap 81 with a D-shaped cross section, the positioning cap 81 is located in the positioning hole 25 and forms a circumferential positioning, a fixing screw plug 9 is threadedly connected to the inner thread of the side mounting hole 24, and the inner end of the fixing screw plug 9 abuts against the positioning cap 81.

[0026] Embodiment 2:

[0027] The technical solution in this embodiment is basically the same as the technical solution in Example 1, with the difference being that, in this embodiment, the limiting structure includes through holes that radially penetrate the flow channel column 4 and are located on both sides of the lower end of the flow channel column 4, and each through hole is provided with a limiting column, the inner end of the limiting column extends into the concave cavity 4a and is threadedly connected to the compensation block 5, and the outer diameter of the limiting column is smaller than the aperture of the through hole 51.

[0028] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0029] Although the present invention uses the terms such as mold body 1, manifold 2, mounting hole 1 21, mounting hole 2 22, shoulder 23, side mounting hole 24, positioning hole 1 25, positioning hole 2 26, nozzle body 3, mating surface 1 3a, input hole 3b, flow channel column 4, concave cavity 4a, inner sphere 4a1, radial hole 4b, flow channel hole 4c, body 41, connecting section 42, flange 43, compensation block 5, mating surface 2 5a, through hole 51, limiting hole 52, limiting screw 6, gap 7, positioning rod 8, positioning cap 81, fixing screw plug 9, locking screw 10, pad 11, positioning block 12, cylinder 13, valve needle 14, etc. more frequently, the possibility of using other terms is not excluded. The use of these terms is only for the purpose of more conveniently describing and explaining the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A processing error automatic compensation structure of a mold hot runner system, the mold hot runner system comprising a manifold (2) and a nozzle body (3) respectively fixed in a mold body (1), the nozzle body (3) having a straight mating surface (3a) at one end facing the manifold (2), characterized in that: The automatic machining error compensation structure comprises a columnar flow channel column (4) fixedly connected to the flow distribution plate (2) and used for conveying raw materials, the lower end surface of the flow channel column (4) is provided with a concave cavity (4a) recessed inwardly and in a hemispherical shape, the inner surface of the concave cavity (4a) is an inner spherical surface (4a1) facing the mating surface (3a), a compensation block (5) in a hemispherical shape and rotatable along the inner spherical surface (4a1) is provided in the concave cavity (4a), and the compensation block (5) has a through hole (5) penetrating along the axial direction. 1), the flow channel column (4) is also provided with a limiting structure for limiting the compensation block (5) from being separated from the concave cavity (4a), and the limiting structure does not affect the compensation block (5) from making a small rotation in any direction along the inner spherical surface (4a1), a portion of the compensation block (5) protrudes from the concave cavity (4a), and the end face of the protruding portion is a straight matching surface 2 (5a), the matching surface 2 (5a) is tightly fitted with the matching surface 1 (3a), and the nozzle body (3) and the flow channel column (4) are connected through the above-mentioned through hole (51).

2. The automatic compensation structure for machining errors of a mold hot runner system according to claim 1, characterized in that: The limiting structure comprises limiting screws (6) fixedly connected to both sides of the flow channel column (4) and arranged in the radial direction, and limiting holes (52) opened on both sides of the outer surface of the compensation block (5) and corresponding to the limiting screws (6) one by one, and part of the studs of the limiting screws (6) extend into the corresponding limiting holes (52), and the hole diameter of the limiting hole (52) is larger than the outer diameter of the studs of the limiting screws (6).

3. The automatic compensation structure for machining errors of a mold hot runner system according to claim 1 or 2, characterized in that: The flow channel column (4) comprises a cylindrical main body (41) and a connecting section (42) located at the upper end of the main body (41); the diverter plate (2) has a first mounting hole (21) and a second mounting hole (22); a stop shoulder (23) is provided between the first mounting hole (21) and the second mounting hole (22); the connecting section (42) is threadedly connected to the first mounting hole (21); and the upper end of the main body (41) abuts against the stop shoulder (23).

4. The automatic compensation structure for machining errors of a mold hot runner system according to claim 1 or 2, characterized in that: The lower end of the flow channel column (4) has a flange portion (43), the concave cavity (4a) is opened on the end surface of the flange portion (43), and a gap (7) is formed between the flange portion (43) and the first mating surface (3a).

5. The automatic compensation structure for machining errors of a mold hot runner system according to claim 1 or 2, characterized in that: One side of the flow channel plate (2) has a side mounting hole (24) radially opened along the flow channel column (4); a positioning hole (25) with a D-shaped cross section is provided at the bottom of the side mounting hole (24); a positioning hole (26) is provided at the bottom of the positioning hole (25); radial holes (4b) arranged radially are provided on the outer peripheral surface of the flow channel column (4); the apertures of the positioning hole (26) and the radial holes (4b) are consistent; a positioning rod (8) is inserted into the positioning hole (26); the inner end of the positioning rod (8) is inserted into the radial hole (4b) and tightly fits with the radial hole (4b); the outer end of the positioning rod (8) has a positioning cap (81) with a D-shaped cross section; the positioning cap (81) is located in the positioning hole (25) and forms circumferential positioning; a fixing screw plug (9) is connected to the inner thread of the side mounting hole (24); the inner end of the fixing screw plug (9) abuts against the positioning cap (81).

6. The automatic compensation structure for machining errors of a mold hot runner system according to claim 1 or 2, characterized in that: An input hole (3b) is provided at the center of the first mating surface (3a), the through hole (51) is located at the center of the second mating surface (5a), and the aperture of the through hole (51) is consistent with the aperture of the input hole (3b).

7. The automatic compensation structure for machining errors of a mold hot runner system according to claim 1 or 2, characterized in that: A flow channel hole (4c) is provided at the bottom centre of the concave cavity (4a), and the diameter of the flow channel hole (4c) is consistent with the diameter of the through hole (51).

8. The automatic compensation structure for machining errors of a mold hot runner system according to claim 1 or 2, characterized in that: The diverter plate (2) is arranged obliquely in the mold body (1), the diverter plate (2) is fixedly connected to the mold body (1) via a locking screw (10), a cushion block (11) is provided between the lower side of the diverter plate (2) and the mold body (1), and the cushion block (11) is sleeved on the locking screw (10).

9. The automatic compensation structure for machining errors of a mold hot runner system according to claim 8, characterized in that: A positioning block (12) is further provided between the lower side of the diverter plate (2) and the mold body (1); one end of the positioning block (12) is fixedly connected to the lower side of the diverter plate (2), and the other end is embedded in the mold body (1).

10. The automatic compensation structure for machining errors of a mold hot runner system according to claim 1, characterized in that: The limiting structure comprises through holes which penetrate the flow channel column (4) in a radial direction and are located on both sides of the lower end of the flow channel column (4), each of the through holes (51) is provided with a limiting column, the inner end of the limiting column extends into the concave cavity (4a) and is threadedly connected to the compensation block (5), and the outer diameter of the limiting column is smaller than the aperture of the through hole.

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