Injection structure of injection molding machine

Abstract

The invention relates to the field of injection molding machine manufacturing, and discloses an injection structure of an injection molding machine, which comprises a machine barrel, a body section and a mounting section which are connected with each other, the outer diameter of the body section is smaller than that of the mounting section, a step surface is formed between the body section and the mounting section, and an assembly ring groove is formed in the outer ring wall of one end, far away from the body section, of the mounting section; the end wall of the end, away from the body section, of the assembly ring groove inclines and forms a matching section with the caliber gradually decreasing towards the body section. The injection table front plate is arranged on the mounting section in a sleeving manner; the assembling component comprises two wedge blocks which are symmetrically hooped on the matching section and a locking component which is connected with the two wedge blocks so as to control the hooping distance between the two wedge blocks; the oblique driving faces of the wedge blocks are attached to the matching sections, along with reduction of the cohesion distance between the two wedge blocks, the machine barrel axially moves, the step faces approach the injection table front plate till the step faces abut against the injection table front plate in a matched mode, and the assembling structure is fast and labor-saving to disassemble and assemble.

Description

Technical Field

[0001] This invention relates to the field of injection molding machine manufacturing, and more particularly to an injection structure for an injection molding machine. Background Technology

[0002] During the assembly and maintenance of the injection molding machine barrel, the efficiency of fixing and disassembling the barrel directly depends on the labor-saving nature of the assembly operation. The structure commonly used in the industry is to first use the threaded fit between the nut and the barrel to achieve a tight fit between the injection unit front plate, the barrel, and the water block, and then use a deformable screw to screw into the loosening port of the nut to deform the pitch of the nut, thereby achieving the effect of preventing loosening.

[0003] In the existing assembly method, the locking direction of the fastener is the same as the locking direction of the front plate of the firing platform and the barrel. In order to prevent the two from loosening after assembly, a sufficiently large preload is required. This requires the use of heavy tools such as electric picks, which not only makes assembly laborious, but also makes subsequent disassembly difficult due to excessive preload. Summary of the Invention

[0004] This invention addresses the drawback of existing methods that use fasteners to fix the injection unit front plate and barrel, which result in laborious disassembly and assembly. It provides an injection structure for an injection molding machine that is easier to assemble.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: An injection structure for an injection molding machine, comprising: The barrel includes a body section and an installation section connected to each other. The outer diameter of the installation section is smaller than the outer diameter of the body section. A stepped surface is formed between the body section and the installation section. An assembly ring groove is provided on the outer ring wall of the end of the installation section away from the body section. The end wall of the assembly ring groove away from the body section is inclined and forms a mating section with a gradually decreasing diameter towards the body section. The front panel of the firing platform is fitted onto the mounting section; The assembly assembly includes two symmetrically engaged wedges on the mating section and a locking assembly connecting the two wedges to control the engagement distance between them; In this process, the inclined driving surface of the wedge blocks fits into the mating section. As the gap between the two wedge blocks decreases, the barrel undergoes axial displacement, and the stepped surface moves closer to the front plate of the firing table until the two come into contact and fit together.

[0006] Using the above solution, the installation and disassembly of the added assembly components, the front plate of the firing platform, and the barrel are all easier, and the two are less likely to loosen after assembly. This is because when the two wedges are engaged by the locking assembly, the direction of the force applied by the locking assembly is not the same as the locking direction of the barrel and the front plate of the firing platform. The wedges will not move due to the reaction force of the locking force between the barrel and the front plate of the firing platform, so it is not easy for the barrel and the front plate of the firing platform to loosen after assembly. Therefore, no large pre-tightening force is required, and no heavy tools are needed, thus achieving the effect of easy installation. Similarly, during disassembly, the disassembly force will not be affected by the reaction force caused by the unlocking of the front plate of the firing platform and the barrel, making disassembly equally convenient and effortless.

[0007] Preferably, the locking assembly includes a first locking bolt, a first through hole and a first threaded hole. The first through hole is symmetrically arranged on both sides of one wedge, and the first threaded hole is symmetrically arranged on both sides of another wedge. The first through hole and the first threaded hole are directly opposite each other, and the first locking bolt passes through the first through hole and is screwed into the first threaded hole.

[0008] With the above solution, the two wedges are locked on both sides by the first locking bolt, and the force is balanced, so there will be no problem of one-sided load. The locking direction of the first locking bolt is not the same as the locking direction of the front plate of the firing platform and the barrel. Therefore, the installation or disassembly is not affected by the locking force of the front plate of the firing platform and the barrel, which prevents loosening and achieves the effect of saving effort.

[0009] Preferably, a locking assembly is provided between the wedge and the front plate of the firing table to fix the wedge and the front plate of the firing table when the two wedges are engaged to a preset degree.

[0010] Preferably, the locking assembly includes a second locking bolt, a second through hole, and a second threaded hole; the second through hole is disposed on the wedge block, the second threaded hole is disposed on the front plate of the firing table, and the second locking bolt passes through the second through hole and is screwed into the second threaded hole.

[0011] By adopting the above scheme, the locking structure can achieve rigid limiting when the wedge blocks are engaged to a preset degree, thereby increasing the stability and firmness of the assembly between the barrel and the front plate of the firing table.

[0012] Preferably, the locking components are arranged in multiple sets at circumferential intervals around the barrel.

[0013] Preferably, the wedge block with the first through hole has a weight-reducing groove, and the first through hole is located at the bottom of the weight-reducing groove.

[0014] By adopting the above solution, the weight-reducing grooving can reduce the required bolt length while reducing weight.

[0015] Preferably, a water block is fitted on the installation section, with the water block located at one end near the main body section, and the water block abuts and cooperates with the front plate of the launcher and the stepped surface respectively.

[0016] Preferably, the generatrix of the mating section is a straight line or curve with a predetermined slope.

[0017] Preferably, the inclined driving surface of the wedge is an inclined arc surface that matches the mating section.

[0018] Preferably, the angle between the busbar of the mating section and the shaft axis of the barrel is between 50° and 70°.

[0019] The present invention, by adopting the above technical solutions, has significant technical effects: The addition of assembly components makes the installation and disassembly of the front plate of the firing platform and the barrel much easier, and the two are less prone to loosening after assembly. This is because when the two wedges are engaged by the locking assembly, the force direction of the locking assembly is not the same as the locking direction of the barrel and the front plate of the firing platform. The wedges will not move due to the reaction force of the locking force between the barrel and the front plate of the firing platform, thus preventing loosening after assembly. Therefore, a large pre-tightening force is not required, achieving a labor-saving effect. Similarly, during disassembly, the disassembly force will not be affected by the reaction force caused by unlocking the front plate of the firing platform and the barrel, making disassembly equally convenient and labor-saving. Attached Figure Description

[0020] Figure 1 This is an isometric view of the injection structure of an injection molding machine according to this embodiment; Figure 2 This is a partial cross-sectional view of the injection structure of an injection molding machine according to this embodiment; Figure 3 yes Figure 2 A magnified view of A; Figure 4 This is a top view of the injection structure of an injection molding machine according to this embodiment; Figure 5 yes Figure 4 A sectional view of AA.

[0021] The parts referred to by the numbers in the above attached figures are as follows: 1. Barrel; 101. Body section; 102. Mounting section; 103. Stepped surface; 2. Water block; 3. Front plate of the injection station; 4. Wedge block; 5. First locking bolt; 6. Second locking bolt; 7. Weight reduction groove; 8. First through hole; 9. First threaded hole; 10. Second through hole; 11. Assembly ring groove; 12. Mating section; 13. Angled drive surface. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0023] An injection structure for an injection molding machine, with reference to Figures 1-5As shown, the device includes a barrel 1, a front plate 3 for the firing platform, and a water block 2. The barrel 1 includes a body section 101 and a mounting section 102 connected to each other. The outer diameter of the body section 101 is smaller than the outer diameter of the mounting section 102. A stepped surface 103 is formed between the body section 101 and the mounting section 102. An assembly ring groove 11 is provided on the outer ring wall of the end of the mounting section 102 away from the body section 101. The end wall of the assembly ring groove 11 away from the body section 101 is inclined and forms a mating section 12 with a gradually decreasing diameter towards the body section. The front plate 3 for the firing platform and the water block 2 are sequentially installed on the mounting section 102. The water block 2 is located between the front plate 3 for the firing platform and the stepped surface 103.

[0024] An assembly assembly is provided on the barrel 1 to achieve axial locking of the barrel 1, the front plate 3 of the injection stage, and the water block 2. The assembly assembly includes two wedges 4 symmetrically engaged on the mating section 12. The generatrix of the mating section 12 is a curve with a preset slope that protrudes outward from the assembly ring groove 11. The angle between the generatrix and the axis of the barrel 1 is 50°-70°, preferably 60°. The two wedges 4 are provided with an inclined driving surface 13 that engages with the mating section 12. The inclined driving surface 13 is an inclined arc surface that matches the mating section 12.

[0025] A locking assembly for controlling the engagement distance between the two wedges 4 is provided. The locking assembly includes a first locking bolt 5, a first through hole 8 and a first threaded hole 9. The first through hole 8 is symmetrically arranged on both sides of one wedge 4, and the first threaded hole 9 is symmetrically arranged on both sides of the other wedge 4. The first through hole 8 and the first threaded hole 9 are directly opposite each other. The first locking bolt 5 passes through the first through hole 8 and is screwed into the first threaded hole 9.

[0026] The wedge block 4 with the first through hole 8 is provided with a weight reduction groove 7. The first through hole 8 is located at the bottom of the weight reduction groove 7. The weight reduction groove 7 can reduce the weight while shortening the length requirement of the first locking bolt 5.

[0027] A locking assembly is provided between the wedge 4 and the front plate 3 of the firing table to limit the two wedges 4 when they are engaged to a preset degree. Multiple sets of locking assemblies are arranged around the circumference of the barrel 1. Each set of locking assemblies includes a second locking bolt 6, a second through hole 10 and a second threaded hole. The second through hole 10 is provided on the wedge 4 and the second threaded hole is provided on the front plate 3 of the firing table. The second locking bolt 6 passes through the second through hole 10 and is screwed into the second threaded hole.

[0028] The assembly process is as follows: 1. First, place the water block 2 inside the installation section 102, then insert one end of the installation section 102 into the assembly hole of the front plate 3 of the firing platform, and the water block 2 is attached to the stepped surface 103 and the outer wall of the front plate 3 of the firing platform respectively. 2. The two wedges 4 are symmetrically fitted into the assembly ring groove 11, so that the inclined driving surface 13 of the wedge 4 is initially fitted with the mating section 12 of the assembly ring groove 11, ensuring that the first through hole 8 of the wedge 4 is aligned with the first threaded hole 9. 3. Pass the first locking bolt 5 through the first through hole 8 of one wedge 4 and screw it into the first threaded hole 9 of the other wedge 4. Manually tighten the first locking bolt 5 to drive the two wedges 4 to move closer together radially. 4. As the first locking bolt 5 is gradually tightened, the inclined driving surface 13 of the wedge block 4 fits tightly with the mating section 12. The radial clamping force is converted into axial thrust through the conical guide, and the barrel 1 moves axially, so that the stepped surface 103, the water block 2 and the front plate of the injection table 3 are axially locked. 5. Finally, pass the second locking bolt 6 through the second through hole 10 of the wedge block 4 and tighten it with the second threaded hole of the front plate 3 of the firing table to complete the locking and limiting, and the assembly is finished.

[0029] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. An injection structure for an injection molding machine, characterized in that, include: The barrel (1) includes a body section (101) and an installation section (102) connected to each other. The outer diameter of the installation section (102) is smaller than the outer diameter of the body section (101). A stepped surface (103) is formed between the body section (101) and the installation section (102). An assembly ring groove (11) is provided on the outer ring wall of the end of the installation section (102) away from the body section (101). The end wall of the assembly ring groove (11) away from the body section (101) is inclined and forms a mating section (12) with a gradually decreasing diameter towards the body section. The front plate (3) of the firing platform is fitted onto the mounting section (102); The assembly assembly includes two wedges (4) symmetrically engaged on the mating section (12) and a locking assembly connecting the two wedges (4) to control the engagement distance between them; Among them, the inclined driving surface (13) of the wedge (4) fits with the mating section (12). As the clamping distance between the two wedges (4) decreases, the barrel (1) undergoes axial displacement, and the stepped surface (103) moves closer to the front plate (3) of the firing table until the two abut and fit together.

2. The injection structure of an injection molding machine according to claim 1, characterized in that: The locking assembly includes a first locking bolt (5), a first through hole (8) and a first threaded hole (9). The first through hole (8) is symmetrically arranged on both sides of one wedge (4), and the first threaded hole (9) is symmetrically arranged on both sides of another wedge (4). The first through hole (8) and the first threaded hole (9) are directly opposite each other. The first locking bolt (5) passes through the first through hole (8) and is screwed into the first threaded hole (9).

3. The injection structure of an injection molding machine according to claim 2, characterized in that: A locking assembly is provided between the wedge (4) and the front plate (3) of the firing platform to fix the wedge (4) and the front plate (3) of the firing platform when the two wedges (4) are engaged to a preset degree.

4. The injection structure of an injection molding machine according to claim 3, characterized in that: The locking assembly includes a second locking bolt (6), a second through hole (10), and a second threaded hole; the second through hole (10) is located on the wedge (4), the second threaded hole is located on the front plate (3) of the firing table, and the second locking bolt (6) passes through the second through hole (10) and is screwed into the second threaded hole.

5. The injection structure of an injection molding machine according to claim 4, characterized in that: The locking components are arranged in multiple sets at circumferential intervals around the machine barrel (1).

6. The injection structure of an injection molding machine according to claim 4, characterized in that: The wedge (4) with a first through hole (8) is provided with a weight reduction groove (7), and the first through hole (8) is located at the bottom of the weight reduction groove (7).

7. The injection structure of an injection molding machine according to claim 1, characterized in that: Water blocks (2) are fitted on the installation section (102). The water blocks (2) are located at one end close to the main body section (101). The water blocks (2) abut against the front plate (3) of the firing platform and the stepped surface (103) respectively.

8. The injection structure of an injection molding machine according to claim 1, characterized in that: The generatrix of the mating segment (12) is a straight line or curve with a preset slope.

9. The injection structure of an injection molding machine according to claim 1, characterized in that: The inclined driving surface (13) of the wedge (4) is an inclined arc surface that matches the mating section (12).

10. The injection structure of an injection molding machine according to claim 1, characterized in that: The angle between the busbar of the mating section (12) and the axis of the barrel (1) is between 50° and 70°.

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