Hole-shaped parallel pipe injection mold with built-in spring buffer mechanism

Abstract

The utility model provides a hole-shaped parallel pipe injection mold with a built-in spring buffer mechanism, and belongs to the technical field of molds. The injection mold comprises a top plate, an injection molding plate, an upper mold mounting plate, an insert mounting plate, a middle plate and a lower mold mounting plate which are sequentially arranged from top to bottom, an upper mold assembly is arranged at the bottom of the upper mold mounting plate, an annular insert is arranged on the middle plate, and a lower mold assembly is arranged on the lower mold mounting plate. The upper die assembly comprises two upper die cylinders with annular sections. After the hole-shaped parallel pipe is subjected to injection molding, the upper mold mounting plate moves upwards to drive the upper mold barrel to move upwards, when the upper mold plate moves upwards, outward core pulling of the side forming insert structure can be achieved, and after a product is demolded, when the upper mold mounting plate drives the upper mold barrel to move downwards, outward core pulling of the side forming insert structure can be achieved. The spring buffer mechanism can guide and buffer the upper die barrel to prevent the side forming insert structure from being pressed due to the falling speed and the overlarge impact of the upper die barrel.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a hole-shaped parallel tube injection mold with a built-in spring buffer mechanism. Background Art

[0002] Hole-shaped parallel tubes are generally formed by injection molding. A side core-pulling structure is provided in the upper mold cylinder of the hole-shaped parallel tube mold. The core pulling of the side core-pulling structure is achieved by moving the upper mold cylinder upward. However, in the prior art, the upper mold cylinder lacks a buffer mechanism when it is moved downward and reset. When resetting, the upper mold cylinder will exert a large compressive force on the side core-pulling structure, thereby posing the possibility of damaging the side core-pulling structure.

[0003] For example, a Chinese patent discloses a core-pulling device and a core-pulling method for a plastic tube injection mold [application number: 201710611549.8], which includes a coaxially arranged upper core mold for the inner hole of the plastic tube and a lower core mold for the inner hole of the plastic tube; the core-pulling device of the plastic tube injection mold also includes: an undercut groove core mold arranged between the upper core mold for the inner hole of the plastic tube and the lower core mold for the inner hole of the plastic tube, and a core mold core-pulling mechanism; the undercut groove core mold includes: a plurality of first-pulling sliders, the number of which is the same as the number of the first-pulling sliders and the rear-pulling sliders arranged at intervals along the circumference with the first-pulling sliders; the two sides of the first-pulling slider are parallel; and the shape of the rear-pulling slider is fan-shaped. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a hole-shaped parallel tube injection mold with a built-in spring buffer mechanism.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A porous parallel tube injection mold with a built-in spring buffer mechanism includes a top plate, an injection plate, an upper mold mounting plate, an insert mounting plate, an intermediate plate and a lower mold mounting plate arranged in sequence from top to bottom, an upper mold assembly is arranged at the bottom of the upper mold mounting plate, an annular insert is arranged on the intermediate plate, and a lower mold assembly is arranged on the lower mold mounting plate. The upper mold assembly includes two upper mold barrels with annular cross-sections, and the lower mold assembly includes two intermediate inserts arranged corresponding to the upper mold barrels, the intermediate inserts pass through the annular inserts and are inserted into the upper mold barrel, and a side forming insert structure inserted into the upper mold barrel is provided on the insert mounting plate, and a spring buffer mechanism is also provided between the upper mold mounting plate and the insert mounting plate.

[0007] In the above-mentioned hole-shaped parallel tube injection mold with a built-in spring buffer mechanism, the side forming insert structure includes a plurality of side forming inserts arranged circumferentially along the axial center line of the upper mold barrel, and the side forming inserts are connected to the upper mold barrel through an oblique guide side withdrawal structure, and the lower mold mounting plate is also provided with an insert limiting structure.

[0008] In the above-mentioned hole-shaped parallel tube injection mold with a built-in spring buffer mechanism, the oblique guide side withdrawal structure includes a side withdrawal slider obliquely fixed on the outer wall of the side forming insert, the cross-section of the side withdrawal slider is T-shaped, and the inner wall of the upper mold barrel is recessed inwardly and provided with an obliquely set side withdrawal guide groove with a T-shaped cross-section. The side withdrawal slider is inserted into the side withdrawal guide groove and slides with the side withdrawal guide groove.

[0009] In the above-mentioned hole-shaped parallel tube injection mold with a built-in spring buffer mechanism, the side-drawing slider is detachably fixed to the side molding insert by a plurality of screws.

[0010] In the above-mentioned hole-shaped parallel tube injection mold with a built-in spring buffer mechanism, the insert limiting structure includes a number of insert limiting rods vertically fixed on the lower mold mounting plate and distributed along the circumferential direction. The insert limiting rods are arranged corresponding to the side forming inserts, and the side forming inserts are provided with vertical limiting grooves for inserting the insert limiting rods.

[0011] In the above-mentioned hole-shaped parallel tube injection mold with a built-in spring buffer mechanism, the spring buffer mechanism includes two first sliding rods fixed on the insert mounting plate and two first sliding sleeves fixed on the upper mold mounting plate. The first sliding rods are inserted into the first sliding sleeves, and the first sliding rods are provided with a buffer spring.

[0012] In the above-mentioned hole-shaped parallel tube injection mold with a built-in spring buffer mechanism, four upper guide rods are fixedly connected to the insert mounting plate, and four upper guide sleeves are fixedly connected to the upper mold mounting plate, and the upper guide rods are inserted into the upper guide sleeves.

[0013] In the above-mentioned hole-shaped parallel tube injection mold with built-in spring buffer mechanism, four intermediate guide rods are fixedly connected to the intermediate plate, and the intermediate guide rods vertically penetrate the insert mounting plate and slide in conjunction with the insert mounting plate.

[0014] In the above-mentioned hole-shaped parallel tube injection mold with built-in spring buffer mechanism, four lower guide rods are fixedly connected to the lower mold mounting plate. The lower guide rods vertically penetrate the middle plate and the insert mounting plate and slide with the middle plate and the insert mounting plate.

[0015] In the above-mentioned hole-shaped parallel tube injection mold with built-in spring buffer mechanism, an injection liquid diverter plate is provided in the injection plate, and an injection tube connected to the upper mold assembly is fixedly connected to the bottom of the injection liquid diverter plate.

[0016] Compared with the existing technology, the advantages of this utility model are:

[0017] 1. After the hole-shaped parallel tube is injection molded, the upper mold mounting plate moves upward to drive the upper mold barrel to move upward. When the upper mold plate moves upward, the side molding insert structure can be pulled outward. After the product is demoulded, when the upper mold mounting plate drives the upper mold barrel to move downward, the spring buffer mechanism can guide and buffer the upper mold barrel to prevent the upper mold barrel from falling too fast and causing excessive impact on the side molding insert structure.

[0018] 2. When the upper die barrel moves upward, the side forming insert can be driven to move horizontally away from the axis of the upper die barrel through the side withdrawal guide groove and the side withdrawal slider, thereby realizing automatic core pulling of the side forming insert.

[0019] 3. The first slide rod cooperates with the first slide sleeve to limit the movement of the upper die mounting plate. When the upper die mounting plate moves downward and resets, the buffer spring can buffer the upper die mounting plate to prevent the upper die barrel from falling too fast and causing excessive impact to the opposite side forming insert structure.

[0020] Other advantages, objectives and features of the present invention will be reflected 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

[0021] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0022] Figure 2 It is a cross-sectional view of the utility model;

[0023] Figure 3 It is a partial structural diagram of the utility model;

[0024] Figure 4 yes Figure 2 Enlarged schematic diagram of point A in the middle.

[0025] In the figure, the top plate 1, the injection molding plate 2, the upper mold mounting plate 3, the insert mounting plate 4, the middle plate 5, the lower mold mounting plate 6, the upper mold assembly 7, the annular insert 8, the lower mold assembly 9, the upper mold cylinder 10, the middle insert 11, the side molding insert structure 12, the spring buffer mechanism 13, the side molding insert 14, the side pull-out slider 15, the side pull-out guide groove 16, the insert limiting rod 17, the vertical limiting groove 18, the first slide bar 19, the first slide sleeve 20, the buffer spring 21, the upper guide rod 22, the upper guide sleeve 23, the middle guide rod 24, the lower guide rod 25, the injection liquid diverter plate 26, and the injection molding tube 27. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 4As shown, a hole-shaped parallel tube injection mold with a built-in spring buffer mechanism includes a top plate 1, an injection plate 2, an upper mold mounting plate 3, an insert mounting plate 4, an intermediate plate 5 and a lower mold mounting plate 6 arranged in sequence from top to bottom, an upper mold mounting plate 3 is provided with an upper mold assembly 7 at the bottom, an annular insert 8 is provided on the intermediate plate 5, and a lower mold mounting plate 6 is provided with a lower mold assembly 9. The upper mold assembly 7 includes two upper mold barrels 10 with an annular cross-section, and the lower mold assembly 9 includes two intermediate inserts 11 arranged corresponding to the upper mold barrel 10, the intermediate inserts 11 pass through the annular inserts 8 and are inserted into the upper mold barrel 10, the insert mounting plate 4 is provided with a side molding insert structure 12 inserted into the upper mold barrel 10, and a spring buffer mechanism 13 is also provided between the upper mold mounting plate 3 and the insert mounting plate 4.

[0027] In the present invention, after the hole-shaped parallel tube is injection-molded, the upper mold mounting plate moves upward to drive the upper mold barrel 10 to move upward. When the upper mold plate moves upward, the side molding insert structure 12 can be pulled outward. After the product is demolded, when the upper mold mounting plate drives the upper mold barrel 10 to move downward, the spring buffer mechanism 13 can guide and buffer the upper mold barrel to prevent the upper mold barrel from falling too fast and the impact is too large, causing pressure on the side molding insert structure 12.

[0028] Specifically, the side-forming insert structure 12 includes a plurality of side-forming inserts 14 arranged circumferentially along the axis of the upper mold barrel 10. The side-forming inserts 14 are connected to the upper mold barrel 10 through an obliquely guided side-drawing structure. The lower mold mounting plate 6 is also provided with an insert limiting structure. The obliquely guided side-drawing structure includes a side-drawing slider 15 obliquely fixed on the outer wall of the side-forming insert 14. The cross-section of the side-drawing slider 15 is T-shaped. The inner wall of the upper mold barrel 10 is recessed inwardly with an obliquely arranged side-drawing guide groove 16 with a T-shaped cross-section. The side-drawing slider 15 is inserted into the side-drawing guide groove 16 and slidably cooperates with the side-drawing guide groove 16. When the upper mold barrel moves upward, it can drive the side-forming insert 14 to move horizontally away from the axis of the upper mold barrel 10 through the side-drawing guide groove 16 and the side-drawing slider 15, thereby realizing automatic core pulling of the side-forming insert.

[0029] Preferably, the side drawer slider 15 is detachably fixed to the side molding insert 14 by a plurality of screws so as to be easily disassembled.

[0030] Specifically, the insert limiting structure includes a plurality of insert limiting rods 17 vertically fixed to the lower mold mounting plate 6 and distributed along the circumferential direction. The insert limiting rods 17 are arranged corresponding to the side forming inserts 14, and the side forming inserts 14 are provided with vertical limiting grooves 18 for inserting the insert limiting rods 17. During injection molding, the insert limiting rods 17 and the vertical limiting grooves 18 cooperate to limit the side forming inserts 14. During demolding, the middle plate and the insert mounting plate move upward to disengage the insert limiting rods from the vertical limiting grooves, and at the same time, the middle insert 11 can also be separated from the product. After disengagement, the upper mold mounting plate moves upward to drive the upper mold barrel to move upward to realize automatic core pulling of the side forming insert.

[0031] Specifically, the spring buffer mechanism 13 includes two first slide bars 19 fixed to the insert mounting plate 4 and two first slide sleeves 20 fixed to the upper mold mounting plate 3. The first slide bars 19 are inserted into the first slide sleeves 20, and the first slide bars 19 are sleeved with buffer springs 21. The first slide bars 19 cooperate with the first slide sleeves 20 to limit the movement of the upper mold mounting plate. When the upper mold mounting plate moves downward and resets, the buffer springs can cushion the upper mold mounting plate to prevent the upper mold barrel from falling too fast and causing excessive impact, which could cause pressure on the side molding insert structure 12.

[0032] Preferably, four upper guide rods 22 are fixedly connected to the insert mounting plate 4, and four upper guide sleeves 23 are fixedly connected to the upper mold mounting plate 3, and the upper guide rods 22 are inserted into the upper guide sleeves 23. The upper guide rods 22 cooperate with the upper guide sleeves 23 to guide and limit the upper mold mounting plate.

[0033] Specifically, four intermediate guide rods 24 are fixedly connected to the intermediate plate 5. The intermediate guide rods 24 vertically penetrate the inlay mounting plate 4 and slide in conjunction with the inlay mounting plate 4. The intermediate guide rods can guide and limit the inlay mounting plate 4.

[0034] Specifically, four lower guide rods 25 are fixedly connected to the lower mold mounting plate 6. The lower guide rods 25 vertically penetrate the middle plate 5 and the insert mounting plate 4 and slide with the middle plate 5 and the insert mounting plate 4. The lower guide rods can guide and limit the middle plate 5 and the insert mounting plate 4.

[0035] Specifically, an injection liquid diverter plate 26 is provided in the injection molding plate 2 , and an injection molding pipe 27 connected to the upper mold assembly 7 is fixedly connected to the bottom of the injection liquid diverter plate 26 .

[0036] The working principle of the utility model is as follows: after the hole-shaped parallel tube is injection-molded, the upper mold mounting plate moves upward to drive the upper mold barrel 10 to move upward, and when the upper mold plate moves upward, the side molding insert structure 12 can be pulled outward. After the product is demoulded, when the upper mold mounting plate drives the upper mold barrel 10 to move downward, the spring buffer mechanism 13 can guide and buffer the upper mold barrel to prevent the upper mold barrel from falling too fast and causing excessive impact on the side molding insert structure 12.

[0037] When the upper mold cylinder moves upward, it can drive the side forming insert 14 to move horizontally away from the axial center line of the upper mold cylinder 10 through the side withdrawal guide groove 16 and the side withdrawal slider 15, so as to realize the automatic core pulling of the side forming insert. During injection molding, the insert limiting rod 17 and the vertical limiting groove 18 cooperate to limit the side forming insert 14. During demoulding, the middle plate and the insert mounting plate move upward to disengage the insert limiting rod from the vertical limiting groove. At the same time, the middle insert 11 can also be separated from the product. After disengagement, the upper mold mounting plate moves upward to drive the upper mold cylinder to move upward to realize the automatic core pulling of the side forming insert. The first slide bar 19 cooperates with the first sliding sleeve 20 to limit the movement of the upper mold mounting plate. When the upper mold mounting plate moves downward and resets, the buffer spring can buffer the upper mold mounting plate to prevent the upper mold cylinder from falling too fast and the impact from being too large causing pressure on the side forming insert structure 12.

[0038] The upper guide rod 22 cooperates with the upper guide sleeve 23 to guide and limit the upper mold mounting plate.

[0039] The middle guide rod can guide and limit the inlay mounting plate 4, and the lower guide rod can guide and limit the middle plate 5 and the inlay mounting plate 4.

[0040] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0041] Although this article uses the top plate 1, injection molding plate 2, upper mold mounting plate 3, insert mounting plate 4, middle plate 5, lower mold mounting plate 6, upper mold assembly 7, annular insert 8, lower mold assembly 9, upper mold cylinder 10, middle insert 11, side molding insert structure 12, spring buffer mechanism 13, side molding insert 14, side pull-out slider 15, side pull-out guide groove 16, insert limiting rod 17, vertical limiting groove 18, first slide rod 19, first slide sleeve 20, buffer spring 21, upper guide rod 22, upper guide sleeve 23, middle guide rod 24, lower guide rod 25, injection liquid diverter plate 26, injection molding tube 27, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A hole-shaped parallel tube injection mold with a built-in spring buffer mechanism, characterized in that: The invention comprises a top plate (1), an injection molding plate (2), an upper mold mounting plate (3), an insert mounting plate (4), an intermediate plate (5) and a lower mold mounting plate (6) which are arranged in sequence from top to bottom, an upper mold assembly (7) is arranged at the bottom of the upper mold mounting plate (3), an annular insert (8) is arranged on the intermediate plate (5), a lower mold assembly (9) is arranged on the lower mold mounting plate (6), the upper mold assembly (7) comprises two upper mold barrels (10) with an annular cross section, the lower mold assembly (9) comprises two intermediate inserts (11) arranged corresponding to the upper mold barrel (10), the intermediate inserts (11) pass through the annular inserts (8) and are inserted into the upper mold barrel (10), the insert mounting plate (4) is provided with a side forming insert structure (12) inserted into the upper mold barrel (10), and a spring buffer mechanism (13) is also provided between the upper mold mounting plate (3) and the insert mounting plate (4).

2. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 1, characterized in that: The side forming insert structure (12) includes a plurality of side forming inserts (14) arranged circumferentially along the axis of the upper mold barrel (10), and the side forming inserts (14) are connected to the upper mold barrel (10) through an oblique guide side withdrawal structure, and the lower mold mounting plate (6) is also provided with an insert limiting structure.

3. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 2, characterized in that: The oblique guide side-drawing structure includes a side-drawing slider (15) obliquely fixed on the outer wall of the side forming insert (14), the cross-section of the side-drawing slider (15) is T-shaped, and the inner wall of the upper mold cylinder (10) is recessed inwardly and provided with a side-drawing guide groove (16) that is obliquely set and has a T-shaped cross-section. The side-drawing slider (15) is inserted into the side-drawing guide groove (16) and slides with the side-drawing guide groove (16).

4. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 3, characterized in that: The side-drawing sliding block (15) is detachably fixed to the side-molding insert (14) by a plurality of screws.

5. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 2, characterized in that: The insert limiting structure includes a plurality of insert limiting rods (17) vertically fixed on the lower mold mounting plate (6) and distributed along the circumferential direction. The insert limiting rods (17) are arranged corresponding to the side forming inserts (14). The side forming inserts (14) are provided with vertical limiting grooves (18) for inserting the insert limiting rods (17).

6. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 1, characterized in that: The spring buffer mechanism (13) includes two first slide bars (19) fixed on the insert mounting plate (4) and two first slide sleeves (20) fixed on the upper mold mounting plate (3). The first slide bars (19) are inserted into the first slide sleeves (20), and the first slide bars (19) are sleeved with buffer springs (21).

7. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 6, characterized in that: Four upper guide rods (22) are fixedly connected to the insert mounting plate (4), and four upper guide sleeves (23) are fixedly connected to the upper die mounting plate (3), and the upper guide rods (22) are inserted into the upper guide sleeves (23).

8. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 7, characterized in that: Four intermediate guide rods (24) are fixedly connected to the intermediate plate (5). The intermediate guide rods (24) vertically penetrate the insert mounting plate (4) and are slidably matched with the insert mounting plate (4).

9. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 8, characterized in that: Four lower guide rods (25) are fixedly connected to the lower die mounting plate (6). The lower guide rods (25) vertically penetrate the middle plate (5) and the insert mounting plate (4) and are slidably matched with the middle plate (5) and the insert mounting plate (4).

10. The hole-shaped parallel tube injection mold with a built-in spring buffer mechanism according to claim 1, characterized in that: An injection liquid diverter plate (26) is provided in the injection molding plate (2), and an injection molding pipe (27) connected to the upper mold assembly (7) is fixedly connected to the bottom of the injection liquid diverter plate (26).

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