Adjustable center injection device of injection molding machine

Abstract

The utility model relates to the technical field of injection molding machines, and discloses an adjustable center injection device of an injection molding machine, which comprises an injection assembly with a charging barrel and a storage assembly with an injection screw rod, and a group of adjusting mechanisms are correspondingly arranged on bottom feet at the bottoms of the injection assembly and the storage assembly respectively. The adjusting mechanism comprises two sliding seats which are distributed in parallel at an interval along the injection direction of the charging barrel and are in guide sliding fit with the guide rails, and adjusting assemblies positioned on the sliding seats; the adjusting assembly comprises a hinged support fixed to the upper end face of the sliding base, a hinged shaft eccentrically rotating on the hinged support and hinged to the footing and a first adjusting piece used for achieving eccentric rotation and limiting of the hinged shaft, and second adjusting pieces used for achieving axial translation of the footing along the hinged shaft are arranged on the two sides of the hinged support. According to the injection device, the centering of the charging barrel and the injection screw rod and the centering of the nozzle on the charging barrel and the mold sprue can be realized through multiple adjustment functions such as vertical adjustment, pitching angle adjustment and horizontal adjustment.

Description

Technical Field

[0001] This utility model relates to the field of injection molding machine technology, and in particular to an adjustable center injection device for injection molding machines. Background Technology

[0002] In existing injection molding machines, the injection unit moves together with the moving platen. Due to the large travel distance of the moving platen and the significant weight of the mold mounted on it, the nozzle of the injection unit cannot be aligned with the mold. To address this issue, an adjustment mechanism capable of adjusting the nozzle position is needed to achieve proper alignment between the nozzle and the mold.

[0003] Chinese Patent No. CN219076345U discloses an injection device with an adjustable barrel position, including a moving template, a base, a barrel body, a first up-down adjustment mechanism, and a left-right adjustment mechanism. When the nozzle of the barrel and the mold are not aligned, the up-down and left-right positions of the barrel body can be adjusted by adjusting the first adjusting component of the first up-down adjustment mechanism and the second adjusting component of the left-right adjustment mechanism, so that the nozzle of the barrel body is aligned with the mold. The alignment process is simple and convenient.

[0004] The first vertical adjustment mechanism and the left and right adjustment mechanism mentioned above both adopt the bolt adjustment method. The bolt moves straight up or straight down. This method cannot adjust the flatness of the module itself. If the injection assembly with the barrel or the discharge assembly with the injection screw in the injection structure is tilted during production or assembly, it is difficult to eliminate the tilt error through the above adjustment mechanism. Therefore, there is room for improvement in the above adjustment method. Utility Model Content

[0005] This invention addresses the shortcomings of existing technologies where the barrel position can only be adjusted vertically or horizontally, failing to eliminate the tilt error caused by production or installation. It provides an adjustable center injection device for injection molding machines with adjustable tilt, height, and horizontal position.

[0006] To solve the above-mentioned technical problems, the present invention provides a solution through the following technical method:

[0007] An adjustable center injection device for an injection molding machine includes an injection assembly with a barrel and a storage assembly with an injection screw. Each of the injection assembly and the storage assembly has a set of adjustment mechanisms on its base feet for adjusting the tilt, height, and horizontal position. Each adjustment mechanism includes two slides spaced parallel to each other along the injection direction of the barrel and slidingly coordinated with a guide rail, and an adjustment component located on the slides. The adjustment component includes a hinge fixed to the upper surface of the slide, a hinge shaft eccentrically rotating on the hinge and hinged to the base feet, and a first adjustment member for realizing and limiting the eccentric rotation of the hinge shaft. Second adjustment members are provided on both sides of the hinge for realizing the axial translation of the base feet along the hinge shaft.

[0008] The above scheme includes an adjustment mechanism with two sets of adjustment components. Each set of adjustment mechanisms has hinge shafts that are distributed front to back, parallel to each other, and each hinged to a base. When the lifting or lowering strokes of the front and rear hinge shafts are consistent, the injection component or storage component moves vertically up and down. When the lifting or lowering strokes of the front and rear hinge shafts are inconsistent, the injection component or storage component moves in pitch. The first adjustment component can realize the lifting or pitching of the injection component or storage component and the limit after adjustment. The second adjustment component can realize the horizontal adjustment and limit of the injection component or storage component. The added pitch angle adjustment can eliminate the tilt error of the injection component or storage component caused by production or assembly, ensuring that the barrel and the injection screw are in a horizontally aligned state. This injection device can realize the alignment of the barrel and the injection screw, as well as the alignment of the nozzle on the barrel and the mold gate, through multiple adjustment functions such as vertical adjustment, pitch angle adjustment, and horizontal adjustment.

[0009] Preferably, the first adjusting component includes two hinge blocks that are parallel and spaced apart on the upper end face of the hinge seat and located on both sides of the base. Each hinge block is rotatably fitted with an eccentric bushing with an eccentric hole. After the hinge shaft passes through the base, its two ends are respectively inserted into the two eccentric bushings. A limiting structure is provided between the eccentric bushing and the hinge block to limit the rotation of the eccentric bushing relative to the hinge block.

[0010] Using the above scheme, the eccentric rotation of the eccentric bushing drives the change in the height of the hinge shaft center, thereby realizing the change in the height or pitch angle of the injection assembly or storage assembly, and the adjustment is then limited by a limiting structure.

[0011] Preferably, when the slide is provided with two parallel adjustment components, the two adjustment components share a hinge shaft, which passes through two parallel feet and engages with four eccentric bushings.

[0012] Preferably, when the slide is provided with two parallel adjustment components, each of the two adjustment components is provided with a hinge shaft and the two hinge shafts are concentrically arranged. Each hinge shaft passes through a foot and is engaged with two eccentric bushings.

[0013] Preferably, the adjustment mechanism has three adjustment components arranged in an isosceles triangle.

[0014] Using the above scheme, in the two slides that cooperate with the guide rail for sliding, one slide is equipped with one adjustment component and the other slide is equipped with two adjustment components, so that the three adjustment components are arranged in an isosceles triangle. This arrangement provides the best stability.

[0015] Preferably, the limiting structure includes an adjustable locking structure for driving and stopping changes in the height of the hinge shaft, and a clamping structure for increasing the limiting strength after the height of the hinge shaft is adjusted.

[0016] Preferably, the adjusting locking structure includes a threaded groove on a hinge block located on the outer side of the base, and an eccentric bushing that cooperates with the hinge block is a threaded eccentric bushing with an external thread that cooperates with the threaded groove. A locking nut is screwed onto the external thread and abuts against the side of the hinge block away from the base.

[0017] With the above solution, as the threaded eccentric bushing rotates, it causes the axis position of the hinge shaft to change. The threaded eccentric bushing has a self-locking effect, and the locking nut can prevent the threaded eccentric bushing from rotating erroneously and increase the stability of the limit.

[0018] Preferably, the clamping structure includes a clamping bolt on the hinge block other than the hinge block with a threaded eccentric bushing. The hinge block has a through hole and a slot at the upper end of the hinge block that communicates with the through hole. The eccentric bushing inserted in the through hole is a smooth eccentric bushing. Threaded grooves are provided on both sides of the slot. After the clamping bolt is tightly fitted with the two threaded grooves, it drives the hinge block to clamp the smooth eccentric bushing.

[0019] Using the above scheme, the hinge block with the smooth eccentric bushing is set in a clamp shape. When the clamping bolt is in a loose state, the through hole and the smooth eccentric bushing are in clearance fit, and the smooth eccentric bushing and the hinge shaft can follow the rotation of the threaded eccentric bushing. When the clamping bolt is in a tight fit, the through hole and the smooth eccentric bushing are in interference fit, which restricts the hinge shaft from rotating with the threaded eccentric bushing. The clamping structure increases the stability of the hinge shaft after adjustment and makes the adjustment of the hinge shaft more convenient.

[0020] As a preferred hinge shaft, one end of the hinge shaft located on the outside of the base is provided with a threaded section and the other end is provided with a limit block. A limit nut is screwed onto the threaded section. The limit nut and the limit block respectively abut against the opposite ends of the eccentric bushings at both ends of the hinge shaft.

[0021] The above scheme facilitates the replacement and assembly of the hinge shaft.

[0022] Preferably, the second adjusting component includes a leveling and tightening bolt that is horizontally screwed onto each of the two hinge blocks on the hinge seat. The threaded ends of the two leveling and tightening bolts are arranged opposite each other and simultaneously abut against both sides of the bottom corner. An anti-deflection nut is fitted on the leveling and tightening bolt to abut against the hinge block and limit the deflection of the leveling and tightening bolt.

[0023] By adopting the above scheme, the horizontal position of the leveling and tightening bolt can be adjusted to change the horizontal position of the injection assembly or the storage assembly and the limit position after the change.

[0024] This utility model, by adopting the above technical solution, has significant technical effects: An adjustment mechanism is set on each side of the injection assembly and the storage assembly. Each adjustment mechanism has two adjustment components, and each adjustment mechanism has a hinge shaft that is distributed front to back, parallel to each other, and each hinged to a base. When the lifting or lowering strokes of the front and rear hinge shafts are consistent, the injection assembly or storage assembly moves vertically up and down; when the lifting or lowering strokes of the front and rear hinge shafts are inconsistent, the injection assembly or storage assembly moves in a pitching motion. The first adjustment component enables the lifting or pitching of the injection assembly or storage assembly, as well as the limiting position after adjustment. The second adjustment component enables the horizontal adjustment and limiting of the injection assembly or storage assembly. The added pitch angle adjustment eliminates the tilt error of the injection assembly or storage assembly caused by production or assembly, ensuring that the barrel and injection screw are in a horizontally aligned state. This injection device can achieve the alignment of the barrel and injection screw, as well as the alignment of the nozzle on the barrel and the mold gate, through multiple adjustment functions such as vertical adjustment, pitch angle adjustment, and horizontal adjustment. Attached Figure Description

[0025] Figure 1 This is a front view of an adjustable center injection device for an injection molding machine according to Embodiment 1;

[0026] Figure 2 This is an isometric view of the adjustment mechanism of Example 1;

[0027] Figure 3 This is an isometric view of the adjustment mechanism in Example 2;

[0028] Figure 4 This is a cross-sectional view of two sets of adjustment components sharing a common hinge shaft in Embodiment 2;

[0029] Figure 5 This is an isometric view of an adjustable center injection device for an injection molding machine according to Embodiment 2.

[0030] The parts referred to by the numbers in the above attached diagrams are as follows: 1. Nozzle; 2. Barrel; 3. Injection assembly; 4. Injection screw; 5. Storage assembly; 6. Adjustment mechanism; 61. Slide; 62. Hinge seat; 63. Hinge block; 64. Threaded eccentric bushing; 65. Locking nut; 66. Smooth eccentric bushing; 67. Grooved; 68. Clamping bolt; 69. Hinge shaft; 610. Threaded section; 611. Limiting block; 612. Limiting nut; 613. Leveling and set bolt; 614. Anti-deflection nut; 7. Foot. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments.

[0032] Example 1

[0033] An adjustable center injection device for an injection molding machine, as described in the following description. Figure 1 As shown, the assembly includes an injection unit 3 with a barrel 2 and a storage unit 5 with an injection screw 4. On the bottom feet 7 of the injection unit 3 and the storage unit 5, there are a set of adjustment mechanisms 6, which can be used to adjust the tilt, height and horizontal position of the injection unit 3 and the storage unit 5 respectively. The adjustment mechanism 6 includes two slides 61 that are parallel and spaced along the injection direction of the barrel 2 and cooperate with the guide rail, and an adjustment component located on the slides 61.

[0034] Combination Figure 2 As shown, a set of adjustment components is provided on the slide 61 near the nozzle 1 at the end of the barrel 2, and two sets of adjustment components are provided on the slide 61 away from the nozzle 1 at the end of the barrel 2. The three sets of adjustment components are distributed in an isosceles triangle. Three pieces of the bottom foot 7 below the injection component 3 and the bottom foot 7 below the discharge component 5 are respectively provided.

[0035] The adjustment assembly includes a hinge seat 62 fixed to the upper end face of the slide 61, a hinge shaft 69 that rotates eccentrically on the hinge seat 62 and is hinged to the base 7, and a first adjustment member for realizing and limiting the eccentric rotation of the hinge shaft 69.

[0036] The first adjusting component includes two hinge blocks 63 arranged parallel to each other on the upper end face of the hinge seat 62 and located on both sides of the base foot 7. A threaded eccentric bushing 64 is screwed onto the hinge block 63 located on the outer side (non-operating side) of the base foot 7 on each hinge seat 62. The threaded eccentric bushing 64 has eccentric holes extending through both ends and external threads evenly distributed on its outer wall. The hinge block 63 that mates with it has a threaded groove that mates with the external threads. The outer wall of the threaded eccentric bushing 64 at the end away from the threaded groove is shaped into a regular hexagon to facilitate rotation by a wrench. A locking nut 65 is fitted onto the external threads to abut against the outer wall of the hinge block 63. (The last sentence appears to be incomplete and possibly refers to a different component.) The hinge block 63 on the side (operating side) is provided with a through hole, and the upper end of the hinge block 63 is provided with a slot 67 communicating with the through hole. Threaded holes are provided on the side walls of the slot 67. The eccentric bushing 66 that is rotatably inserted into the through hole is a smooth eccentric bushing 66. The smooth eccentric bushing 66 has eccentric holes that pass through both ends and the outer wall is smooth. A clamping bolt 68 is screwed onto the threaded hole. The clamping bolt 68 is screwed into both threaded holes. As the clamping bolt 68 is tightened continuously, the through hole and the smooth eccentric bushing 66 can be changed from a clearance fit to an interference fit, and finally the hinge block 63 clamps the smooth eccentric bushing 66.

[0037] When two sets of adjustment components are provided on the slide 61, each set of adjustment components has a hinge shaft and the two hinge shafts 69 are in a concentric state. A limit block 611 is provided at the end of the hinge shaft 69 away from the threaded eccentric bushing 64, and a threaded section 610 is provided at the end near the threaded eccentric bushing 64. A limit nut 612 is screwed onto the threaded section 610. The limit nut 612 and the limit block 611 respectively abut against the opposite ends of the threaded eccentric bushing 64 and the smooth eccentric bushing 66.

[0038] A second adjusting member is provided on the hinge seat 62 to realize the axial translation of the foot 7 along the hinge axis 69. The second adjusting member includes a leveling and tightening bolt 613 that is horizontally screwed onto each of the two hinge blocks 63 on the hinge seat 62. The threaded ends of the two leveling and tightening bolts 613 are arranged opposite each other and simultaneously abut against both sides of the foot 7. An anti-deflection nut 614 is fitted on the leveling and tightening bolt 613 to abut against the hinge block 63 and limit the deflection of the leveling and tightening bolt 613.

[0039] The assembly and adjustment methods for the adjustment components are as follows:

[0040] First, tighten the locking nut 65 onto the external thread of the threaded eccentric bushing 64; tighten the threaded eccentric bushing 64 into the appropriate depth of the hinge block 63 with threaded groove; after the hinge shaft 69 is inserted into the smooth eccentric bushing 66, insert the smooth eccentric bushing 66 into the hinge block 63 near the inner side of the base 7. After the hinge shaft 69 passes through the base 7, rotate and adjust the angle of the threaded eccentric bushing 64 so that the hinge shaft 69 can pass through the eccentric hole of the threaded eccentric bushing 64; tighten the locking nut 65 onto the threaded section 610 of the hinge shaft 69. Tighten the locking nut 65 to an appropriate depth first, but do not tighten it yet, to prevent the hinge shaft 69 from loosening from the hinge seat 62. Rotate the threaded eccentric bushing 64 with a wrench to make the hinge shaft 69 and the smooth eccentric bushing 66 move accordingly, so that the hinge shaft 69 can rotate along the eccentric path and the height of the hinge shaft 69 can be adjusted. After the adjustment is in place, first tighten the clamping bolt 68 to make the hinge block 63 clamp the smooth eccentric bushing 66, then tighten the locking nut 65, and finally tighten the limit nut 612, thus completing the adjustment and locking of the hinge shaft 69 in a set of adjustment components. By adjusting the leveling and tightening bolts 613 on both sides of the hinge seat 62, the horizontal position of the base 7 can be adjusted and limited. After the adjustment is in place, rotate the anti-rotation nut 614 to lock it.

[0041] Example 2

[0042] The difference between this embodiment and Embodiment 1 is that, referring to... Figures 3-5 As shown, when the slide 61 is equipped with two sets of adjustment components, the two sets of adjustment components share a hinge shaft 69. The four hinge blocks 63 on the two hinge seats 62 have a threaded hole on the outer hinge block 63 and are fitted with a threaded eccentric bushing 64. The remaining hinge blocks 63 are all provided with through holes and slots 67, and smooth eccentric bushings 66 are rotatably inserted into the through holes. The hinge blocks 63 fitted with smooth eccentric bushings 66 are all screwed with clamping bolts 68. The hinge shaft 69 passes through one threaded eccentric bushing 64 and three smooth eccentric bushings 66 in sequence and is then locked with a limit nut 612.

[0043] The advantage of the above setup is that the two sets of adjustment components sharing a single hinge shaft only require adjustment of the threaded eccentric bushing 64 to make the hinge shaft 69 and the three smooth eccentric bushings 66 move accordingly. After adjusting the position of the hinge shaft 69, first tighten the clamping bolt 68, and finally tighten the locking nut 65 and the limit nut 612 in sequence. Compared with Embodiment 1, the adjustment is more convenient.

[0044] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected by this utility model. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An adjustable center injection device for an injection molding machine, comprising an injection assembly (3) with a barrel (2) and a storage assembly (5) with an injection screw (4), characterized in that: On the bottom feet (7) of the injection assembly (3) and the storage assembly (5), there are corresponding adjustment mechanisms (6) for adjusting the inclination, height and horizontal position of the injection assembly (3) and the storage assembly (5). The adjustment mechanism (6) includes two slides (61) that are parallel and spaced along the injection direction of the barrel (2) and are guided and slidably cooperated with the guide rail, and an adjustment component located on the slide (61). The adjustment component includes a hinge (62) fixed on the upper end face of the slide (61), a hinge shaft (69) that rotates eccentrically on the hinge (62) and is hinged to the bottom foot (7), and a first adjustment member for realizing the eccentric rotation of the hinge shaft (69) and limiting it. On both sides of the hinge (62), there are second adjustment members for realizing the axial translation of the bottom foot (7) along the hinge shaft (69).

2. The adjustable center injection device for an injection molding machine according to claim 1, characterized in that: The first adjusting component includes two hinge blocks (63) arranged parallel to each other on the upper end face of the hinge seat (62) and located on both sides of the base (7). Each hinge block (63) is rotatably fitted with an eccentric bushing with an eccentric hole. The hinge shaft (69) passes through the base (7) and its two ends are respectively inserted into the two eccentric bushings. A limiting structure is provided between the eccentric bushing and the hinge block to limit the rotation of the eccentric bushing relative to the hinge block.

3. The adjustable center injection device for an injection molding machine according to claim 2, characterized in that: When the slide (61) is provided with two parallel adjustment components, the two adjustment components share a hinge shaft (69), and the hinge shaft (69) passes through two parallel feet (7) and is engaged with four eccentric bushings.

4. The adjustable center injection device for an injection molding machine according to claim 2, characterized in that: When the slide (61) is provided with two parallel adjustment components, each of the two adjustment components is provided with a hinge shaft (69) and the two hinge shafts (69) are concentrically arranged. Each hinge shaft (69) passes through a foot (7) and is engaged with two eccentric bushings.

5. An adjustable center injection device for an injection molding machine according to claim 3 or 4, characterized in that: The adjustment mechanism (6) has three adjustment components and the three adjustment components are distributed in an isosceles triangle.

6. The adjustable center injection device for an injection molding machine according to claim 5, characterized in that: The limiting structure includes an adjusting locking structure for driving the height of the hinge shaft (69) to change and stop accordingly, and a clamping structure for increasing the limiting strength after the height of the hinge shaft (69) is adjusted.

7. The adjustable center injection device for an injection molding machine according to claim 6, characterized in that: The adjusting locking structure includes a threaded groove provided on a hinge block (63) located outside the base (7), and an eccentric bushing that cooperates with the hinge block (63) is a threaded eccentric bushing (64) with an external thread that cooperates with the threaded groove. A locking nut (65) is screwed onto the external thread and abuts against the side of the hinge block (63) away from the base (7).

8. The adjustable center injection device for an injection molding machine according to claim 7, characterized in that: The clamping structure includes a clamping bolt (68) provided on the hinge block (63) excluding the hinge block (63) with a threaded eccentric bushing (64). The hinge block (63) has a through hole and a slot (67) communicating with the through hole is opened at the upper end of the hinge block (63). The eccentric bushing inserted in the through hole is a smooth eccentric bushing (66). Threaded grooves are opened on both sides of the slot (67). After the clamping bolt (68) is tightly fitted with the two threaded grooves, it drives the hinge block (63) to clamp the smooth eccentric bushing (66).

9. The adjustable center injection device for an injection molding machine according to claim 2, characterized in that: The hinge shaft (69) is provided with a threaded section (610) at one end outside the base (7) and a limit block (611) at the other end. A limit nut (612) is screwed onto the threaded section (610). The limit nut (612) and the limit block (611) respectively abut against the opposite ends of the eccentric bushings at both ends of the hinge shaft (69).

10. An adjustable center injection device for an injection molding machine according to claim 2, characterized in that: The second adjusting component includes a leveling set bolt (613) that is horizontally screwed onto each of the two hinge blocks (63) on the hinge seat (62). The threaded ends of the two leveling set bolts (613) are arranged opposite each other and simultaneously abut against both sides of the bottom corner. An anti-deflection nut (614) is fitted on the leveling set bolt (613) to abut against the hinge block (63) and limit the deflection of the leveling set bolt (613).

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