A kind of manifold pipe connection structure

Abstract

The utility model belongs to the field of hot runner technology, and particularly relates to a manifold tube connection structure. The injection nozzle manifold and the hot nozzle manifold are connected together as a manifold. It includes an injection nozzle manifold and a hot nozzle manifold, and the injection nozzle manifold and the hot nozzle manifold are connected through a connecting pipe; the injection nozzle manifold, the hot nozzle manifold and the connecting pipe form a connected flow channel; the two ends of the connecting pipe are respectively installed on the injection nozzle manifold and the hot nozzle manifold through a fixing mechanism; the threaded fixed pressure block is used to connect with the injection nozzle manifold and the hot nozzle manifold; the slot fixed pressure block is used to resist the connecting pipe and limit the threaded fixed pressure block at the same time. The connecting pipe is installed on the injection nozzle manifold and the hot nozzle manifold through the fixing mechanism, which is convenient to install and has good stability. There is no obstacle to the connection between the flow channel of the connecting pipe and the flow channel on the manifold plate, and each flow channel is tightly connected; the fixing mechanism plays a radial positioning role when the connecting pipe is installed.

Description

Technical Field

[0001] The utility model belongs to the technical field of hot runners, in particular to a manifold tube type connection structure. Background Art

[0002] With the widespread use of plastic products in daily life, people's requirements for plastic products are getting higher and higher. Therefore, the requirements for hot runners in mold production are also increasing. Hot runners are generally customized one-to-one, and one set of molds corresponds to one set of hot runners, which cannot be interchanged. Unless the mold is completely the same when it is backed up, the hot runner can be interchanged. In order to innovate and open up the market, and to help customers save costs, it can also make the hot runner more standardized, improve production and processing efficiency, and shorten the delivery cycle. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a manifold pipe connection structure which connects an injection nozzle manifold plate and a hot nozzle manifold plate together as a manifold plate.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] A manifold pipe connection structure comprises an injection nozzle manifold and a hot nozzle manifold, wherein the injection nozzle manifold and the hot nozzle manifold are connected via a connecting pipe; the injection nozzle manifold, the hot nozzle manifold and the connecting pipe form a flow channel that is interconnected; the two ends of the connecting pipe are respectively mounted on the injection nozzle manifold and the hot nozzle manifold via a fixing mechanism; the fixing mechanism comprises a threaded fixing pressure block sleeved on the end of the connecting pipe, a slot fixing pressure block mounted on the connecting pipe is provided in the threaded fixing pressure block; the threaded fixing pressure block is used to connect with the injection nozzle manifold and the hot nozzle manifold; the slot fixing pressure block is used to press against the connecting pipe and limit the threaded fixing pressure block at the same time.

[0006] Furthermore, connecting pipe grooves are symmetrically provided on the outer wall surfaces at both ends of the connecting pipe, and a connecting pipe flow channel is provided in the connecting pipe; the connecting pipe flow channel is connected with the flow channel I of the injection nozzle manifold plate and the flow channel II of the hot nozzle manifold plate; the threaded fixing pressure block is provided with a connected threaded fixing chamber I and a threaded fixing chamber II, and the outer wall surface of the threaded fixing pressure block located at the position of the threaded fixing chamber I is provided with an external thread I; the groove fixing pressure block includes a groove block body and a groove block; the two ends of the connecting pipe respectively pass through the threaded fixing chamber II and the threaded fixing chamber I in sequence until the connecting pipe groove is located outside the threaded fixing chamber I, the groove block is inserted into the connecting pipe groove, the groove block body contacts the outer wall surface of the connecting pipe, the threaded fixing pressure block moves toward the end of the connecting pipe until the bottom surface of the threaded fixing chamber I contacts the groove block, and the external thread I is respectively connected and fixed to the internal thread I of the injection nozzle manifold plate and the internal thread II of the hot nozzle manifold plate.

[0007] Furthermore, the threaded fixing feature surface in the threaded fixing chamber I is pressed against the slot block feature surface of the slot block, and the slot block fixing surface of the slot block is pressed against the slot feature surface in the connecting pipe slot.

[0008] Further, the internal thread I is located on the inner wall surface of the pipe mounting hole I, a connected pipe positioning hole I is provided between the pipe mounting hole I and the flow channel I, the positioning surface I in the pipe positioning hole I cooperates with the pipe positioning surface on one end of the connecting pipe for positioning, and the characteristic surface I in the pipe positioning hole I abuts and presses against the pipe characteristic surface on one end of the connecting pipe; the internal thread II is located on the inner wall surface of the pipe mounting hole II, a connected pipe positioning hole II is provided between the pipe mounting hole II and the flow channel II, the positioning surface II in the pipe positioning hole II cooperates with the pipe positioning surface on the other end of the connecting pipe for positioning, and the characteristic surface II in the pipe positioning hole II abuts and presses against the pipe characteristic surface on the other end of the connecting pipe.

[0009] Furthermore, an injection nozzle is installed on the injection nozzle diverter plate, and a detachable injection nozzle flow tube is provided in the injection nozzle; a hot nozzle is installed on the hot nozzle diverter plate, and a detachable hot nozzle flow tube is provided in the hot nozzle; the injection nozzle flow tube is connected with flow channel I, connecting pipeline flow channel, flow channel II, and hot nozzle flow tube.

[0010] Furthermore, a flow channel installation cavity I for installing the injection nozzle flow channel tube is provided in the injection nozzle, the outer circumferential surface of the injection nozzle flow channel tube cooperates with the inner circumferential surface of the flow channel installation cavity I, and the inner circumferential surface of the injection nozzle flow channel tube is connected and matched with the inner circumferential surface of the flow channel I; a flow channel installation cavity II for installing the hot nozzle flow channel tube is provided in the hot nozzle, the outer circumferential surface of the hot nozzle flow channel tube cooperates with the inner circumferential surface of the flow channel installation cavity II, and the inner circumferential surface of the hot nozzle flow channel tube is connected and matched with the inner circumferential surface of the flow channel II.

[0011] Furthermore, by adjusting the thickness of the tube wall formed between the outer circumferential surface and the inner circumferential surface of the injection nozzle flow channel tube, it is seamlessly connected with flow channel I to allow the rubber material to flow; by adjusting the thickness of the tube wall formed between the outer circumferential surface and the inner circumferential surface of the hot nozzle flow channel tube, it is seamlessly connected with flow channel II to allow the rubber material to flow.

[0012] Furthermore, a fixing plate is provided between the injection nozzle diverter plate and the hot nozzle diverter plate.

[0013] Furthermore, a heater is provided on the outer wall surface of the connecting pipe.

[0014] Furthermore, the slot fixing pressing block is composed of a pressing block I and a pressing block II combined into a circular ring shape, and the pressing block I and the pressing block II have the same structure.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. Standardize the design of the hot nozzle manifold head, connect the injection nozzle manifold and the hot nozzle manifold with a stainless steel connecting pipe, set a copper sleeve heater outside the connecting pipe, and connect and fix the hot nozzle manifold and the injection nozzle manifold with a fixing plate, and connect and fix all the manifolds into one manifold through the connecting pipe.

[0017] 2. The connecting pipe is installed on the injection nozzle manifold and the hot nozzle manifold through a fixing mechanism. It is easy to install and has good stability. The flow channel of the connecting pipe is unobstructedly connected with the flow channel on the manifold, and the various flow channels are tightly connected. The fixing mechanism plays a radial positioning role when installing the connecting pipe. The threaded fixing block is used to connect and fix with the injection nozzle manifold and the hot nozzle manifold by thread. The thread design is more convenient for disassembly and assembly. On the basis of convenient disassembly and assembly, the tight connection between the connecting pipe and the manifold must also be considered to ensure seamless and no leakage of rubber. The fixing block is used to hold the connecting pipe against the connecting pipe and limit the threaded fixing block to prevent the connecting pipe from shifting.

[0018] 3. The injection nozzle and hot nozzle are provided with detachable injection nozzle flow tube and hot nozzle flow tube, both of which are seamless steel tubes. If the material needs to be cleaned due to carbonization or the flow diameter needs to be changed due to unbalanced filling, the injection nozzle flow tube and hot nozzle flow tube are removed for cleaning and then reinstalled or replaced with injection nozzle flow tubes and hot nozzle flow tubes with different inner diameters. The outer diameters of flow tubes with different inner diameters are fixed, and the difference in inner diameters is achieved by adjusting the wall thickness of the flow tube. If a small-sized inner diameter flow tube is required, the inner diameter is reduced by increasing the wall thickness; if a large-sized inner diameter flow tube is required, the inner diameter is increased by reducing the wall thickness. The adjustment of the wall thickness affects the size of the inner diameter of the flow tube. In production, injection nozzle flow tubes and hot nozzle flow tubes with different inner diameters can be achieved by changing the wall thickness of the flow tube.

[0019] 4. Seamless steel pipes are easy to replace, and standardized blocks of hot nozzle manifolds can be kept in stock and are also easy to replace. There is no need to replace the entire system, which saves time, effort and production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the utility model;

[0021] Figure 2 It is a schematic diagram of the structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the diverter plate of the injection nozzle of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the hot nozzle manifold of the utility model;

[0024] Figure 5 This is a schematic diagram of the connecting pipeline structure of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the threaded fixed pressing block of the utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the card slot fixing block of the utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the pressing block I and the pressing block II of the utility model;

[0028] Fig. 9 It is a schematic diagram of the matching structure of the fixing mechanism and the connecting pipe of the utility model. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. Obviously, the described implementation is a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention but merely represents selected embodiments of the present invention.

[0031] Based on the implementations in the utility model, all other implementations obtained by ordinary technicians in the field under the instructions before making creative work are within the scope of protection of the utility model.

[0032] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0034] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0035] like Figure 1 , 2 , 3, 4, 5, 6, 7, 8, 9 as shown:

[0036] A manifold pipe connection structure includes an injection nozzle manifold 1 and a hot nozzle manifold 2, wherein the injection nozzle manifold 1 and the hot nozzle manifold 2 are connected via a connecting pipe 3; the injection nozzle manifold 1, the hot nozzle manifold 2 and the connecting pipe 3 form a flow channel in communication; the two ends of the connecting pipe 3 are respectively mounted on the injection nozzle manifold 1 and the hot nozzle manifold 2 via a fixing mechanism 4; the fixing mechanism 4 includes a threaded fixing block 41 sleeved on the end of the connecting pipe 3, and a slot fixing block 42 mounted on the connecting pipe 3 is arranged inside the threaded fixing block 41; the threaded fixing block 41 is used to connect with the injection nozzle manifold 1 and the hot nozzle manifold 2; the slot fixing block 42 is used to abut against the connecting pipe 3 and limit the threaded fixing block 41 at the same time. A heater 8 is sleeved on the outer wall of the connecting pipe 3.

[0037] The design of the hot nozzle manifold head will be standardized, the injection nozzle manifold and the hot nozzle manifold will be connected with a section of stainless steel connecting pipe, a copper sleeve heater will be set outside the connecting pipe, and a fixing plate will be used to connect and fix the hot nozzle manifold and the injection nozzle manifold. All manifolds will be connected and fixed into one manifold through the connecting pipe.

[0038] Further, the outer wall surfaces at both ends of the connecting pipe 3 are symmetrically provided with connecting pipe grooves 31, and the connecting pipe flow channel 32 is provided in the connecting pipe 3; the connecting pipe flow channel 32 is connected with the flow channel I12 of the injection nozzle manifold 1 and the flow channel II22 of the hot nozzle manifold 2; the threaded fixing pressure block 41 is provided with a connected threaded fixing chamber I411 and a threaded fixing chamber II412, and the outer wall surface of the threaded fixing pressure block 41 located at the position of the threaded fixing chamber I411 is provided with an external thread I413; the slot fixing pressure block 42 includes a slot block body 421 and a slot block 422;

[0039] The two ends of the connecting pipe 3 respectively pass through the threaded fixing chamber II 412 and the threaded fixing chamber I 411 in sequence until the connecting pipe slot 31 is located outside the threaded fixing chamber I 411, the slot block 422 is inserted into the connecting pipe slot 31, the slot block body 421 contacts the outer wall surface of the connecting pipe 3, the threaded fixing pressure block 41 moves toward the end of the connecting pipe 3 until the bottom surface of the threaded fixing chamber I 411 contacts the slot block 422, and the external thread I 413 is respectively connected and fixed with the internal thread I 11 of the injection nozzle diverter plate 1 and the internal thread II 21 of the hot nozzle diverter plate 2.

[0040] Furthermore, the threaded fixing feature surface 414 in the threaded fixing chamber I 411 is pressed against the slot block feature surface 423 of the slot block 422 , and the slot block fixing surface 424 of the slot block 422 is pressed against the slot feature surface 33 in the connecting pipe slot 31 .

[0041] Furthermore, the internal thread I11 is located on the inner wall surface of the pipe mounting hole I13, and a connected pipe positioning hole I14 is provided between the pipe mounting hole I13 and the flow channel I12. The positioning surface I141 in the pipe positioning hole I14 cooperates with the pipe positioning surface 34 on one end of the connecting pipe 3 for positioning, and the characteristic surface I142 in the pipe positioning hole I14 abuts and presses against the pipe characteristic surface 35 on one end of the connecting pipe 3; the internal thread II21 is located on the inner wall surface of the pipe mounting hole II23, and a connected pipe positioning hole II24 is provided between the pipe mounting hole II23 and the flow channel II22. The positioning surface II241 in the pipe positioning hole II24 cooperates with the pipe positioning surface 34 on the other end of the connecting pipe 3 for positioning, and the characteristic surface II242 in the pipe positioning hole II24 abuts and presses against the pipe characteristic surface 35 on the other end of the connecting pipe 3.

[0042] Furthermore, an injection nozzle 5 is installed on the injection nozzle diverter plate 1, and a detachable injection nozzle flow channel tube 51 is provided in the injection nozzle 5; a hot nozzle 6 is installed on the hot nozzle diverter plate 2, and a detachable hot nozzle flow channel tube 61 is provided in the hot nozzle 6; the injection nozzle flow channel tube 51 is connected with the flow channel I12, the connecting pipeline flow channel 32, the flow channel II22, and the hot nozzle flow channel tube 61.

[0043] Furthermore, a flow channel installation cavity I52 for installing the injection nozzle flow channel tube 51 is provided in the injection nozzle 5, the outer circumferential surface of the injection nozzle flow channel tube 51 cooperates with the inner circumferential surface of the flow channel installation cavity I52, and the inner circumferential surface of the injection nozzle flow channel tube 51 is connected and matched with the inner circumferential surface of the flow channel I12; a flow channel installation cavity II62 for installing the hot nozzle flow channel tube 61 is provided in the hot nozzle 6, the outer circumferential surface of the hot nozzle flow channel tube 61 cooperates with the inner circumferential surface of the flow channel installation cavity II62, and the inner circumferential surface of the hot nozzle flow channel tube 61 is connected and matched with the inner circumferential surface of the flow channel II22.

[0044] Furthermore, by adjusting the thickness of the tube wall formed between the outer circumferential surface and the inner circumferential surface of the injection nozzle runner tube 51, the inner circumferential surface of the injection nozzle runner tube 51 is seamlessly connected to the inner circumferential surface of the runner I12 for the rubber to flow; by adjusting the thickness of the tube wall formed between the outer circumferential surface and the inner circumferential surface of the hot nozzle runner tube 61, the inner circumferential surface of the hot nozzle runner tube 61 is seamlessly connected to the inner circumferential surface of the runner II22 for the rubber to flow.

[0045] If a small inner diameter flow channel tube is required, the inner diameter is reduced by increasing the wall thickness; if a large inner diameter flow channel tube is required, the inner diameter is increased by reducing the wall thickness; the adjustment of the wall thickness affects the size of the inner diameter of the flow channel tube; the size of the inner diameter is also the size that interfaces with flow channel I12 and flow channel II22.

[0046] Furthermore, a fixing plate 7 is provided between the injection nozzle manifold plate 1 and the hot nozzle manifold plate 2. The fixing plate 7 is used to reinforce the connection between the injection nozzle manifold plate 1 and the hot nozzle manifold plate 2.

[0047] Furthermore, the slot fixing block 42 is composed of a block I 43 and a block II 44 in a circular ring shape, and the blocks I 43 and II 44 have the same structure. The blocks I 43 and II 44 are both semicircular ring-shaped, which is convenient for installation and matching with the connecting pipe 3. After the blocks I 43 and II 44 are sequentially installed at the corresponding positions of the connecting pipe 3, the two blocks are molded together to form a circular ring shape, and then the screw fixing block 41 is used to press the blocks I 43 and II 44 in the screw fixing chamber I 411.

[0048] When in use, the injection molding rubber enters the injection nozzle through the injection head of the injection molding machine, and then enters the injection nozzle runner tube of the injection nozzle, and then enters the runner I of the injection nozzle diversion plate, and then enters the connected connecting pipeline runner, and then enters the runner II of the hot nozzle diversion plate, and then enters the hot nozzle runner tube of the hot nozzle, and finally enters the nozzle tip runner through the gate to complete the injection molding.

[0049] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited by the above-mentioned embodiments. Those skilled in the art may make various modifications or variations to the utility model without departing from the technical concept of the utility model, and these modifications or variations certainly fall within the scope of protection of the utility model.

Claims

1. A manifold tube connection structure, characterized in that: It comprises an injection nozzle diverter plate (1) and a hot nozzle diverter plate (2), wherein the injection nozzle diverter plate (1) and the hot nozzle diverter plate (2) are connected via a connecting pipe (3); The injection nozzle manifold plate (1), the hot nozzle manifold plate (2) and the connecting pipe (3) form a connected flow channel; The two ends of the connecting pipe (3) are respectively mounted on the injection nozzle manifold (1) and the hot nozzle manifold (2) through fixing mechanisms (4); The fixing mechanism (4) comprises a threaded fixing block (41) sleeved on the end of the connecting pipe (3), wherein a slot fixing block (42) mounted on the connecting pipe (3) is provided in the threaded fixing block (41); The threaded fixed pressing block (41) is used to be connected to the injection nozzle manifold plate (1) and the hot nozzle manifold plate (2); The slot fixing pressing block (42) is used to press against the connecting pipe (3) and limit the thread fixing pressing block (41) at the same time.

2. The manifold-tube connection structure according to claim 1, characterized in that: The outer wall surfaces at both ends of the connecting pipe (3) are symmetrically provided with connecting pipe clamping grooves (31), and the connecting pipe (3) is provided with a connecting pipe flow channel (32); The connecting pipe flow channel (32) is in communication with the flow channel I (12) of the injection nozzle manifold (1) and the flow channel II (22) of the hot nozzle manifold (2); The threaded fixing pressing block (41) is provided with a threaded fixing chamber I (411) and a threaded fixing chamber II (412) which are connected to each other, and an outer wall surface of the threaded fixing pressing block (41) located at the threaded fixing chamber I (411) is provided with an external thread I (413); The slot fixing pressing block (42) comprises a slot block body (421) and a slot block (422); The two ends of the connecting pipe (3) pass through the threaded fixing chamber II (412) and the threaded fixing chamber I (411) in sequence until the connecting pipe slot (31) is located outside the threaded fixing chamber I (411), the slot block (422) is inserted into the connecting pipe slot (31), the slot block body (421) contacts the outer wall surface of the connecting pipe (3), the threaded fixing pressure block (41) moves toward the end of the connecting pipe (3) until the bottom surface of the threaded fixing chamber I (411) contacts the slot block (422), and the external thread I (413) is connected and fixed to the internal thread I (11) of the injection nozzle manifold (1) and the internal thread II (21) of the hot nozzle manifold (2).

3. The manifold-tube connection structure according to claim 2, characterized in that: The thread fixing characteristic surface (414) in the thread fixing chamber I (411) is pressed against the slot block characteristic surface (423) of the slot block (422), and the slot block fixing surface (424) of the slot block (422) is pressed against the slot characteristic surface (33) in the connecting pipe slot (31).

4. The manifold-tube connection structure according to claim 2, characterized in that: The internal thread I (11) is located on the inner wall surface of the pipe installation hole I (13); a pipe positioning hole I (14) is provided between the pipe installation hole I (13) and the flow channel I (12); a positioning surface I (141) in the pipe positioning hole I (14) cooperates with a pipe positioning surface (34) on one end of the connecting pipe (3) for positioning; a characteristic surface I (142) in the pipe positioning hole I (14) abuts against and presses against a pipe characteristic surface (35) on one end of the connecting pipe (3); The internal thread II (21) is located on the inner wall surface of the pipe installation hole II (23); a pipe positioning hole II (24) is provided between the pipe installation hole II (23) and the flow channel II (22); a positioning surface II (241) in the pipe positioning hole II (24) cooperates with a pipe positioning surface (34) on the other end of the connecting pipe (3) for positioning; a characteristic surface II (242) in the pipe positioning hole II (24) abuts against and presses against a pipe characteristic surface (35) on the other end of the connecting pipe (3).

5. The manifold-tube connection structure according to claim 2, characterized in that: An injection nozzle (5) is mounted on the injection nozzle manifold plate (1), and a detachable injection nozzle flow channel tube (51) is provided inside the injection nozzle (5); A hot nozzle (6) is mounted on the hot nozzle manifold plate (2), and a detachable hot nozzle flow channel pipe (61) is provided in the hot nozzle (6); The injection nozzle flow channel tube (51) is connected to the flow channel I (12), the connecting pipeline flow channel (32), the flow channel II (22), and the hot nozzle flow channel tube (61).

6. The manifold-tube connection structure according to claim 5, characterized in that: The injection nozzle (5) is provided with a flow channel installation cavity I (52) for installing the injection nozzle flow channel tube (51), the outer circumferential surface of the injection nozzle flow channel tube (51) is matched with the inner circumferential surface of the flow channel installation cavity I (52), and the inner circumferential surface of the injection nozzle flow channel tube (51) is connected and matched with the inner circumferential surface of the flow channel I (12); The hot nozzle (6) is provided with a flow channel installation cavity II (62) for installing the hot nozzle flow channel tube (61), the outer circumferential surface of the hot nozzle flow channel tube (61) cooperates with the inner circumferential surface of the flow channel installation cavity II (62), and the inner circumferential surface of the hot nozzle flow channel tube (61) is connected and cooperated with the inner circumferential surface of the flow channel II (22).

7. The manifold-tube connection structure according to claim 6, characterized in that: By adjusting the thickness of the tube wall formed between the outer circumferential surface and the inner circumferential surface of the injection nozzle flow channel tube (51), the tube wall is seamlessly connected to the flow channel I (12) to allow the rubber material to flow; By adjusting the thickness of the tube wall formed between the outer circumferential surface and the inner circumferential surface of the hot nozzle flow channel tube (61), the flow channel II (22) is seamlessly connected to allow the rubber material to flow.

8. The manifold-tube connection structure according to claim 1, characterized in that: A fixing plate (7) is provided between the injection nozzle diverter plate (1) and the hot nozzle diverter plate (2).

9. The manifold-tube connection structure according to claim 6, characterized in that: The outer wall surface of the connecting pipe (3) is provided with a heater (8).

10. The manifold-tube connection structure according to claim 2, characterized in that: The slot fixing pressure block (42) is composed of a pressure block I (43) and a pressure block II (44) combined into a circular ring shape, and the pressure block I (43) and the pressure block II (44) have the same structure.

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