Injection device of injection molding machine with separated injection and loosening structures

Abstract

The utility model belongs to the technical field of injection molding devices of injection molding machines, and particularly relates to an injection device of an injection molding machine with separated injection and loosening structures. The injection table comprises an injection table base, a sliding table is arranged above the injection table base, a main pipe sleeve base and a supporting base are arranged above the sliding table, an inner pipe sleeve is arranged on one side in the main pipe sleeve base and connected with a main injection cylinder, a bearing shaft is arranged on the other side of the main injection cylinder and connected with the main injection cylinder, and a bearing shaft sleeve is arranged outside the bearing shaft. And meanwhile, an injection piston rod is arranged outside the bearing shaft sleeve and is connected with an injection head, two auxiliary loosening cylinders are arranged outside the main pipe sleeve base, and the outer ends of the auxiliary loosening cylinders are connected to a rhombic frame, the injection and loosening actions are completed by utilizing the main injection cylinder and the two auxiliary loosening cylinders, and compared with an integrated injection mechanism, the injection mechanism has the advantages that the structure is simplified, the cost is reduced, and the production efficiency is improved. The installation and maintenance difficulty is reduced, the number of parts needing multiple seals is reduced, the operation load is reduced, and the service life is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of injection molding devices of injection molding machines, and relates to an injection molding device of an injection molding machine with separated injection and release structures. Background Art

[0002] Injection molding machine is also known as injection molding machine or injection machine. It is the main molding equipment that uses plastic molding molds to make plastic products of various shapes from thermoplastics or thermosetting plastics. The injection part of the injection molding machine is the most important core component of whether the entire injection molding machine can produce good products. The internal bearing shaft of the existing injection molding machine cooperates with the output transition shaft. During the injection process, it is necessary to perform left and right reciprocating motion and counterclockwise rotation motion at the same time. The sealing effect of the key parts needs to be ensured, resulting in a complex structure of the injection part, and the moving parts of the injection device are integrally connected to the reduction box and servo motor, resulting in a large inertia of the injection device, high energy consumption, and slow response, which has a great impact on the installation, maintenance and service life of the injection molding machine. Therefore, in view of the above problems, an injection device of an injection molding machine with a separated injection and release structure is proposed. Utility Model Content

[0003] The utility model aims to solve the above problems and provides an injection device of an injection molding machine with separated injection and release structures.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An injection device of an injection molding machine with a separate injection and release structure, comprising a shooting platform base, a slide table is arranged above the shooting platform base, a main pipe sleeve base and a support seat are arranged above the slide table, an inner pipe sleeve is inserted into one end of the main pipe sleeve base, and one end of a main shooting cylinder is inserted into the inner pipe sleeve, two auxiliary release cylinders are inserted into one end of the main pipe sleeve base, and a support frame is arranged on the inner auxiliary release cylinder, a hydraulic system is arranged above the support frame, and an oil pipe is arranged outside the hydraulic system, and the other end of the oil pipe is respectively arranged above the other end of the main shooting cylinder and the two auxiliary release cylinders. In one end of the retraction cylinder, a diamond frame is provided at the other end of the auxiliary loosening and retraction cylinder, and a connecting pipe sleeve is provided between the diamond frame and the main shooting cylinder, one end of the driving motor assembly is inserted into the diamond frame and the connecting pipe sleeve, and one end of the driving motor assembly is inserted into the main shooting cylinder, and the driving motor assembly is placed above the support seat at the same time, an shooting piston rod and a bearing sleeve are inserted at the other end of the main pipe sleeve base, and a bearing shaft is inserted into the shooting piston rod and the bearing sleeve, and one end of the bearing shaft is inserted into the main shooting cylinder, and the other end of the main pipe sleeve base is fixedly connected to one end of the telescopic cylinder on the outside.

[0006] In the above-mentioned injection device of an injection molding machine with a separated injection and release structure, the top of the shooting platform base is fixedly connected to a slide, one side of the top of the slide is slidably connected to the bottom of the main pipe sleeve base, and the other side of the top of the slide is fixedly connected to the bottom of the support seat, and there is a distance between the support seat and the main pipe sleeve base, a placement through hole is opened in the main pipe sleeve base, and a port at one end of the main pipe sleeve base is placed in the middle of the slide.

[0007] In the above-mentioned injection device of an injection molding machine with a separate injection and release structure, an inner tube sleeve is inserted into one side of the placement through hole for rotational connection, and the end face of the inner tube sleeve is flush with the end face of the main tube sleeve base, and one end of the main tube sleeve is inserted into the inner tube sleeve for fixed connection with the main shooting cylinder, and the inner tube sleeve and the end face of the main tube sleeve base are tightly fitted with the step surface of the main shooting cylinder.

[0008] In the above-mentioned injection device of an injection molding machine with separated injection and release structures, two U-shaped clamping parts are fixedly connected to the outer middle part of one end of the main sleeve base, and the two U-shaped clamping parts are at the same level as the center line of the main shooting cylinder. The U-shaped clamping part is inserted and fixedly connected to the middle part of the auxiliary release cylinder, and one end of the inner auxiliary release cylinder is fixedly connected to the support frame upwardly.

[0009] In the above-mentioned injection device of an injection molding machine with separated injection and release structures, the hydraulic system is fixedly connected to the top of the support frame, and the front of the hydraulic system is fixedly connected to one end of three oil pipes, and the other ends of the oil pipes are fixedly connected to one end of two auxiliary release cylinders and the top of the outer end of the main shooting cylinder, and the other end of the auxiliary release cylinder is fixedly connected to the two ends of the diamond frame.

[0010] In the above-mentioned injection device of an injection molding machine with separate injection and release structures, a limiting hole is opened in the diamond frame, and the limiting hole is on the same axis as the main shooting cylinder, and the two ends of the fixed connection sleeve are inserted between the inner side of the limiting hole and the middle of the outer end of the main shooting cylinder.

[0011] In the above-mentioned injection device of an injection molding machine with a separated injection and release structure, a drive motor assembly is fixedly connected inside the top of the support seat, a rotating shaft assembly is provided at one end of the drive motor assembly, and the middle part of the rotating shaft assembly is inserted into the rotation connection limit hole and the connecting sleeve, and at the same time, one end of the rotating shaft assembly is inserted into the middle part of the outer end of the main shooting cylinder for fixed connection.

[0012] In the above-mentioned injection device of an injection molding machine with separated injection and release structures, the middle part of the rotatably connected bearing sleeve is inserted into the other side of the placement through hole, and the outer end of the bearing sleeve is flush with the outer end of the main sleeve base, and the outer end of the bearing sleeve is rotatably connected to one end of the injection piston rod.

[0013] In the above-mentioned injection device of an injection molding machine with a separated injection and release structure, the other end of the injection piston rod is fixedly connected to the injection head, the injection piston rod and the bearing shaft are inserted into the bearing sleeve, and the inner end of the bearing shaft is fixedly connected to the bearing sleeve, and the inner end of the bearing shaft passes through the bearing sleeve.

[0014] In the above-mentioned injection device of an injection molding machine with separate injection and release structures, the inner end of the bearing shaft is inserted and fixedly connected to the middle part of the other side of the main shooting cylinder, and there is a gap between the outer cone end of the bearing shaft and the inner center of the shooting head.

[0015] Compared with the existing technology, the advantages of the utility model are:

[0016] The utility model is provided with a slide above the shooting platform base, and a main pipe sleeve base and a supporting seat are provided above the slide, an inner pipe sleeve and a main shooting cylinder are provided on one side of the main pipe sleeve base, and one side of the main shooting cylinder is connected to a rotating shaft assembly of a driving motor assembly, a bearing shaft is provided on the other side of the main shooting cylinder for connection, and a bearing sleeve is provided outside the bearing shaft, and an shooting piston rod is provided outside the bearing sleeve for connection with the shooting head, two auxiliary loosening and withdrawing cylinders are provided outside the main pipe sleeve base, and the outer ends of the auxiliary loosening and withdrawing cylinders are connected to a rhombus frame, and the main shooting cylinder and the two auxiliary loosening and withdrawing cylinders are used to complete the injection and loosening and withdrawing actions. Compared with an integrated injection mechanism, the utility model simplifies the structure, reduces the difficulty of installation and maintenance, reduces the parts requiring multiple seals, reduces the running load, and increases the service life.

[0017] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is an overall schematic diagram of the utility model;

[0019] Figure 2 It is an overall exploded schematic diagram of the utility model;

[0020] Figure 3 It is a schematic diagram of the overall left side view of the utility model;

[0021] Figure 4 It is a schematic diagram of the overall right side view of the utility model;

[0022] Figure 5 It is an overall front view schematic diagram of the utility model;

[0023] Figure 6 It is a schematic diagram of the overall back view of the utility model;

[0024] Figure 7 It is an overall top view schematic diagram of the utility model.

[0025] In the figure: 1. Shooting platform base; 2. Slide; 3. Support seat; 4. Drive motor assembly; 41. Rotating shaft assembly; 5. Diamond frame; 51. Limit hole; 6. Connecting sleeve; 7. Secondary loosening cylinder; 8. Main sleeve base; 81. Placement through hole; 9. Support frame; 10. Hydraulic system; 11. Shooting piston rod; 12. Shooting head; 13. Telescopic cylinder; 14. Main shooting cylinder; 15. Inner sleeve; 16. Bearing shaft; 17. Oil pipe; 18. U-shaped clamp; 19. Bearing sleeve. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-7 As shown, an injection device of an injection molding machine with separated injection and release structures comprises a shooting platform base 1, a slide 2 is arranged above the shooting platform base 1, a main pipe sleeve base 8 and a support seat 3 are arranged above the slide 2, an inner pipe sleeve 15 is inserted into one end of the main pipe sleeve base 8, and one end of a main shooting cylinder 14 is inserted into the inner pipe sleeve 15, two auxiliary release cylinders 7 are clamped into one end of the main pipe sleeve base 8, and a support frame 9 is arranged on the inner side of the auxiliary release cylinder 7, a hydraulic system 10 is arranged above the support frame 9, and an oil pipe 17 is arranged outside the hydraulic system 10, and the other end of the oil pipe 17 is respectively arranged above the other end of the main shooting cylinder 14 and the two auxiliary release cylinders. 7, a diamond frame 5 is provided at the other end of the auxiliary loosening and retreating cylinder 7, and a connecting pipe sleeve 6 is provided between the diamond frame 5 and the main shooting cylinder 14, one end of the driving motor assembly 4 is inserted into the diamond frame 5 and the connecting pipe sleeve 6, and one end of the driving motor assembly 4 is inserted into the main shooting cylinder 14, and the driving motor assembly 4 is placed above the support seat 3, and the other end of the main pipe sleeve base 8 is inserted with an shooting piston rod 11 and a bearing sleeve 19, and a bearing shaft 16 is inserted into the shooting piston rod 11 and the bearing sleeve 19, and one end of the bearing shaft 16 is inserted into the main shooting cylinder 14, and the other end of the main pipe sleeve base 8 is fixedly connected to one end of the telescopic cylinder 13 on the outside.

[0028] The slide 2 is fixedly connected to the top of the shooting platform base 1, one side of the slide 2 is slidably connected to the bottom of the main pipe sleeve base 8, and the other side of the slide 2 is fixedly connected to the bottom of the support seat 3. At the same time, there is a distance between the support seat 3 and the main pipe sleeve base 8. A placement through hole 81 is opened in the main pipe sleeve base 8, and a port at one end of the main pipe sleeve base 8 is placed in the middle of the slide 2.

[0029] A slide 2 is provided above the shooting platform base 1 for sliding the main pipe sleeve base 8 and fixing the support seat 3. Under the action of external components, the main pipe sleeve base 8 and the upper components are moved backward with the support seat 3 as the supporting point.

[0030] Furthermore, an inner sleeve 15 is inserted into one side of the placement through hole 81 for rotational connection, and the end face of the inner sleeve 15 is flush with the end face of the main sleeve base 8, and one end of the main shooting cylinder 14 is inserted and fixedly connected to the inner sleeve 15, and the end faces of the inner sleeve 15 and the main sleeve base 8 are tightly fitted with the step surface of the main shooting cylinder 14.

[0031] An inner sleeve 15 and a main shooting cylinder 14 are provided on one side of the main sleeve base 8. The inner sleeve 15 and the main shooting cylinder 14 are fixedly connected and inserted into the main sleeve base 8, so that the three are integrated during operation, and the rotation of the main shooting cylinder 14 in the main sleeve base 8 is not affected.

[0032] Furthermore, two U-shaped clamping parts 18 are fixedly connected to the outer middle part of one end of the main sleeve base 8, and the two U-shaped clamping parts 18 are at the same level as the center line of the main shooting cylinder 14. The U-shaped clamping parts 18 are clamped and fixedly connected to the middle part of the auxiliary loosening and withdrawing cylinder 7, and one end of the inner auxiliary loosening and withdrawing cylinder 7 is fixedly connected to the support frame 9 upwardly.

[0033] Furthermore, a hydraulic system 10 is fixedly connected to the top of the support frame 9, and the front of the hydraulic system 10 is fixedly connected to one end of three oil pipes 17, and the other ends of the oil pipes 17 are fixedly connected to one end of two auxiliary loosening and retraction cylinders 7 and the top of the outer end of the main shooting cylinder 14, and the other ends of the auxiliary loosening and retraction cylinders 7 are fixedly connected to both ends of the diamond frame 5.

[0034] After the auxiliary loosening and withdrawing cylinder 7 is fixedly connected in the U-shaped clamping parts 18 on both sides of the main sleeve base 8, and a hydraulic system 10 is provided outside to provide power to the auxiliary loosening and withdrawing cylinder 7, after the power is provided, the auxiliary loosening and withdrawing cylinder 7 extends to make the main sleeve base 8 retreat.

[0035] Furthermore, a limiting hole 51 is provided in the diamond frame 5 , and the limiting hole 51 is coaxial with the main shooting cylinder 14 , and two ends of the connecting sleeve 6 are inserted and fixedly connected between the inner side of the limiting hole 51 and the middle of the outer end of the main shooting cylinder 14 .

[0036] Furthermore, a driving motor assembly 4 is fixedly connected to the top of the support seat 3, and a rotating shaft assembly 41 is provided at one end of the driving motor assembly 4, and the middle of the rotating shaft assembly 41 is inserted into the rotation connection limit hole 51 and the connecting sleeve 6, and at the same time, one end of the rotating shaft assembly 41 is inserted into the middle of the outer end of the main shooting cylinder 14 for fixed connection.

[0037] A rotating shaft assembly 41 is provided on one side of the driving motor assembly 4, which is inserted into the main shooting cylinder 14 to provide power during operation. The rotating shaft assembly 41 is protected and positioned for insertion and removal by a connecting pipe sleeve 6 provided externally. When the hydraulic system 10 gives power to the secondary loosening and retracting cylinder 7, the support seat 3 is fixed, so that the main sleeve base 8 is pushed backward by the secondary loosening and retracting cylinder 7.

[0038] The middle part of the bearing sleeve 19 is inserted and rotatably connected into the other side of the through hole 81 , and the outer end of the bearing sleeve 19 is flush with the outer end of the main sleeve base 8 , and the outer end of the bearing sleeve 19 is rotatably connected to one end of the ejection piston rod 11 .

[0039] Furthermore, the other end of the injection piston rod 11 is fixedly connected to the injection head 12, the injection piston rod 11 and the bearing sleeve 19 are inserted into the bearing shaft 16, and the inner end of the bearing shaft 16 is fixedly connected to the bearing sleeve 19, and the inner end of the bearing shaft 16 passes through the bearing sleeve 19.

[0040] After the bearing sleeve 19 and the bearing shaft 16 are inserted into the placement through hole 81 of the main sleeve base 8 and the inner end of the bearing shaft 16 is connected to the main shooting cylinder 14, the driving motor assembly 4 is used to rotate, and the internal feed is injected and extruded from the shooting head 12 of the shooting piston rod 11.

[0041] Furthermore, the inner end of the bearing shaft 16 is inserted and fixedly connected to the middle part of the other side of the main shooting cylinder 14 , and there is a gap between the outer conical end of the bearing shaft 16 and the inner center of the shooting head 12 .

[0042] A gap is left between the bearing shaft 16 and the ejection head 12 so that the feed material can be extruded from the inside in a shaped manner.

[0043] Working principle:

[0044] A slide 2 is provided above the shooting platform base 1, and a main pipe sleeve base 8 and a support seat 3 are provided above the slide 2. An inner pipe sleeve 15 and a main shooting cylinder 14 are provided on one side of the main pipe sleeve base 8, and one side of the main shooting cylinder 14 is connected to the rotating shaft assembly 41 of the driving motor assembly 4, and a connecting pipe sleeve 6 is placed outside the rotating shaft assembly 41 for protection. The main shooting cylinder 14 is driven by the driving motor assembly 4 to rotate and shoot. A bearing shaft 16 is provided on the other side of the main shooting cylinder 14 for connection, and a bearing sleeve 19 is provided outside the bearing shaft 16. At the same time, an injection piston rod 11 is provided outside the bearing sleeve 19 to connect with the injection head 12, so that the feeding is from the main shooting cylinder 14 to the main shooting cylinder 14. The cylinder 14 is discharged to the inside of the bearing shaft 16 and the injection piston rod 11, and then squeezed out from the injection head 12. Two auxiliary loosening and retreating cylinders 7 are provided outside the main sleeve base 8, and the auxiliary loosening and retreating cylinders 7 are supplied with work by the hydraulic system 10. The outer ends of the auxiliary loosening and retreating cylinders 7 are connected to the diamond frame 5. Since the diamond frame 5, the connecting sleeve 6, the driving motor assembly 4 and the support seat 3 are connected to form an integral whole, when the injection action is completed, the hydraulic system 10 is started to supply oil to the auxiliary loosening and retreating cylinder 7, and the main shooting cylinder 14 is drained. In this way, the auxiliary loosening and retreating cylinder 7 is extended to drive the main sleeve base 8 and one side of the components to retreat, so that the main shooting cylinder 14 is disengaged from the rotating shaft assembly 41 to complete the loosening and retreating action.

[0045] 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 without departing from the spirit of the present invention.

[0046] Although this article uses more terms such as 1, shooting platform base; 2, slide; 3, support seat; 4, drive motor assembly; 41, shaft assembly; 5, diamond frame; 51, limit hole; 6, connecting sleeve; 7, auxiliary loosening cylinder; 8, main sleeve base; 81, placement through hole; 9, support frame; 10, hydraulic system; 11, shooting piston rod; 12, shooting head; 13, telescopic cylinder; 14, main shooting cylinder; 15, inner sleeve; 16, bearing shaft; 17, oil pipe; 18, U-shaped clamp; 19, bearing sleeve, etc., it does not exclude the possibility of using other terms. These terms are used only to more conveniently describe and explain the essence of the utility model. It is contrary to the spirit of the utility model to interpret them as any additional restrictions.

Claims

1. An injection device of an injection molding machine with a separate injection and release structure, comprising a shooting platform base (1), characterized in that: A slide (2) is provided above the shooting platform base (1), and a main pipe sleeve base (8) and a support seat (3) are provided above the slide (2), respectively; an inner pipe sleeve (15) is inserted into one end of the main pipe sleeve base (8), and one end of a main shooting cylinder (14) is inserted into the inner pipe sleeve (15); two auxiliary loosening and retracting cylinders (7) are inserted into one end of the main pipe sleeve base (8), and a support frame (9) is provided on the inner auxiliary loosening and retracting cylinder (7); a hydraulic system (10) is provided above the support frame (9), and an oil pipe (17) is provided outside the hydraulic system (10), and the other end of the oil pipe (17) is respectively provided above the other end of the main shooting cylinder (14) and inside one end of the two auxiliary loosening and retracting cylinders (7), and the other end of the auxiliary loosening and retracting cylinder (7) is provided on the inner auxiliary loosening and retracting cylinder (7). A diamond frame (5) is provided, and a connecting pipe sleeve (6) is provided between the diamond frame (5) and the main shooting cylinder (14), one end of a driving motor assembly (4) is inserted into the diamond frame (5) and the connecting pipe sleeve (6), and one end of the driving motor assembly (4) is inserted into the main shooting cylinder (14), and the driving motor assembly (4) is placed above the support seat (3), the other end of the main pipe sleeve base (8) is inserted with an shooting piston rod (11) and a bearing sleeve (19), and a bearing shaft (16) is inserted into the shooting piston rod (11) and the bearing sleeve (19), and one end of the bearing shaft (16) is inserted into the main shooting cylinder (14), and the other end of the main pipe sleeve base (8) is fixedly connected to one end of a telescopic cylinder (13) on the outside.

2. The injection device of an injection molding machine with a separate injection and release structure according to claim 1, characterized in that: The top of the shooting platform base (1) is fixedly connected to a slide table (2), one side of the top of the slide table (2) is slidably connected to the bottom of a main pipe sleeve base (8), and the other side of the top of the slide table (2) is fixedly connected to the bottom of a support seat (3), and there is a distance between the support seat (3) and the main pipe sleeve base (8), a placement through hole (81) is opened in the main pipe sleeve base (8), and a port at one end of the main pipe sleeve base (8) is placed in the middle of the slide table (2).

3. The injection device of an injection molding machine with a separate injection and release structure according to claim 2, characterized in that: An inner tube sleeve (15) is inserted into one side of the placement through hole (81) for rotational connection, and the end surface of the inner tube sleeve (15) is flush with the end surface of the main tube sleeve base (8). One end of the main shooting cylinder (14) is inserted into the inner tube sleeve (15) for fixed connection, and the inner tube sleeve (15), the end surface of the main tube sleeve base (8) and the step surface of the main shooting cylinder (14) are tightly fitted.

4. The injection device of an injection molding machine with a separate injection and release structure according to claim 3, characterized in that: Two U-shaped clamping parts (18) are fixedly connected to the middle part of one end of the main sleeve base (8), and the two U-shaped clamping parts (18) are at the same level as the center line of the main shooting cylinder (14). The U-shaped clamping parts (18) are clamped and fixedly connected to the middle part of the auxiliary loosening and withdrawing cylinder (7), and one end of the inner auxiliary loosening and withdrawing cylinder (7) is fixedly connected to the support frame (9) upwardly.

5. The injection device of an injection molding machine with a separate injection and release structure according to claim 4, characterized in that: The support frame (9) is fixedly connected to a hydraulic system (10) on the top, and the front of the hydraulic system (10) is fixedly connected to one end of three oil pipes (17), and the other ends of the oil pipes (17) are fixedly connected to one end of two auxiliary release cylinders (7) and the top of the outer end of the main shooting cylinder (14), and the other ends of the auxiliary release cylinders (7) are fixedly connected to the two ends of the diamond frame (5).

6. The injection device of an injection molding machine with a separate injection and release structure according to claim 5, characterized in that: A limiting hole (51) is provided in the diamond frame (5), and the limiting hole (51) and the main shooting cylinder (14) are coaxially aligned, and two ends of a connecting pipe sleeve (6) are inserted and fixedly connected between the inner side of the limiting hole (51) and the middle of the outer end of the main shooting cylinder (14).

7. The injection device of an injection molding machine with a separate injection and release structure according to claim 6, characterized in that: A driving motor assembly (4) is fixedly connected to the upper part of the support seat (3); a rotating shaft assembly (41) is provided at one end of the driving motor assembly (4); and a middle portion of the rotating shaft assembly (41) is inserted into a rotation connection limit hole (51) and a connecting sleeve (6); and at the same time, one end of the rotating shaft assembly (41) is inserted into a middle portion of an outer end of a main shooting cylinder (14) for fixed connection.

8. The injection device of an injection molding machine with separate injection and release structures according to claim 7, characterized in that: The middle part of the rotatably connected bearing sleeve (19) is inserted into the other side of the placement through hole (81), and the outer end of the bearing sleeve (19) is flush with the outer end of the main pipe sleeve base (8), and the outer end of the bearing sleeve (19) is rotatably connected to one end of the ejection piston rod (11).

9. The injection device of an injection molding machine with separate injection and release structures according to claim 8, characterized in that: The other end of the injection piston rod (11) is fixedly connected to the injection head (12), the injection piston rod (11) and the bearing sleeve (19) are inserted into the bearing shaft (16), and the inner end of the bearing shaft (16) is fixedly connected to the bearing sleeve (19), and the inner end of the bearing shaft (16) passes through the bearing sleeve (19).

10. The injection device of an injection molding machine with separate injection and release structures according to claim 9, characterized in that: The inner end of the bearing shaft (16) is inserted and fixedly connected into the middle part of the other side of the main shooting cylinder (14), and there is a gap between the outer cone end of the bearing shaft (16) and the inner center of the shooting head (12).

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