CN215931462U

CN215931462U - Mould for preparing mechanical property defect sample

Info

Publication number: CN215931462U
Application number: CN202122074407.7U
Authority: CN
Inventors: 颜杨; 陈平绪; 叶南飚; 陈小鹿; 周起雄
Original assignee: Kingfa Science and Technology Co Ltd
Current assignee: Kingfa Science and Technology Co Ltd
Priority date: 2021-08-30
Filing date: 2021-08-30
Publication date: 2022-03-01
Anticipated expiration: 2031-08-30

Abstract

The utility model relates to the technical field of polymer injection molding processing equipment, in particular to a mold for preparing a mechanical property defect sample, which comprises a cavity plate, wherein a runner and a plurality of cavities are arranged on the cavity plate, the runner comprises a main runner, a first branch runner and a plurality of second branch runners, the second branch runners are communicated with the main runner through first branch runners, and the cavities are communicated with the second branch runners in a one-to-one correspondence manner; and two ends of the cavity are communicated with a second branch flow passage, and a flow regulating mechanism is arranged on the second branch flow passage. The utility model has simple structure and convenient use, can obtain defect samples with different weld line positions, is used for researching the performance of the defect samples and can better evaluate the performance of actual samples.

Description

Mould for preparing mechanical property defect sample

Technical Field

The utility model relates to the technical field of polymer injection molding processing equipment, in particular to a mold for preparing a mechanical property defect sample.

Background

The elastic modulus of the polymer is usually obtained by testing the bending mechanical behavior of a mechanical property sample, and the value can directly reflect the difference between the elasticity and the rigidity of different materials and can also be input into software for simulation. However, some existing mechanical property samples have weld lines, which are visible defects caused by two or more melt flow paths meeting each other during injection molding of the samples, and the existence of the weld lines can reduce the mechanical properties of the samples to some extent. If the bending sample test data without weld line defects is used for evaluating the defect samples with weld lines, the mechanical properties of the bending sample test data are greatly deviated when the deformation is compared or simulated and evaluated.

Chinese patent publication No. CN210100573U discloses a flow rate adjusting structure for an injection mold, in which a turning member is disposed on a mold core, the turning member movably penetrates the mold core, and an inner end of the turning member extends into a middle portion of a first branch flow passage, a through groove on an inner end surface of the turning member is communicated with the first branch flow passage, and the turning member is rotated to change a size of a rubber feeding section of the flow passage, thereby gradually achieving rubber feeding balance.

However, the above scheme cannot prepare defect samples with different weld line positions, and cannot study the performance of the defect samples.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art, provides the mould for preparing the mechanical property defect sample, has a simple structure, is convenient to use, can obtain the defect sample with different welding line positions, is used for researching the performance of the defect sample, and can better evaluate the performance of the actual sample.

In order to solve the technical problems, the utility model adopts the technical scheme that:

the mold for preparing the mechanical property defect sample comprises a cavity plate, wherein a runner and a plurality of cavities are arranged on the cavity plate, the runner comprises a main runner, a first branch runner and a plurality of second branch runners, the second branch runners are communicated with the main runner through the first branch runners, and the cavities are communicated with the second branch runners in a one-to-one correspondence manner; and two ends of the cavity are communicated with a second branch flow passage, and a flow regulating mechanism is arranged on the second branch flow passage.

Preferably, the first shunt passage is provided with the flow regulating mechanism. The flow regulating mechanism can be any one of a throttle valve, a control valve and a regulating switch.

Preferably, the flow rate adjusting mechanism comprises a movable member rotatably connected with the cavity plate, a circulation groove is arranged on the movable member, and a partition structure on the flow passage is formed by the side wall of the circulation groove.

Preferably, a plurality of positioning pieces are arranged at the edge of the cavity plate.

Preferably, both ends of the cavity are connected with the second branch runner through a pouring gate.

Preferably, the cavities comprise a first cavity, a second cavity, a third cavity and a fourth cavity which are communicated with the sub-channel. The shape and structure of the first cavity, the second cavity, the third cavity and the fourth cavity can be the same or different; the sections of the first cavity, the second cavity, the third cavity and the fourth cavity are of T-shaped structures with different shapes.

Preferably, the cross section of the first cavity is of a first T-shaped structure, the first T-shaped structure comprises a first horizontal section and a first vertical section connected with the first horizontal section, and two sides of the first vertical section are arc-shaped surfaces.

Preferably, the section of the second cavity is a second T-shaped structure, the second T-shaped structure includes a second horizontal section and a second vertical section connected to the second horizontal section, and the cross-sectional area of the second vertical section gradually decreases from one end close to the second horizontal section to one end far away from the second horizontal section.

Preferably, the cross section of the third cavity is of a third T-shaped structure, the third T-shaped structure comprises a third horizontal section and a third vertical section connected with the third horizontal section, and two sides of the third vertical section are arc-shaped surfaces; the free end of the third vertical section is connected with an extension section.

Preferably, the cross section of the fourth cavity is a fourth T-shaped structure, the fourth T-shaped structure includes a fourth horizontal section and a fourth vertical section connected to the fourth horizontal section, and the fourth vertical section is funnel-shaped.

Compared with the prior art, the utility model has the beneficial effects that:

the utility model relates to a mould for preparing a mechanical property defect sample, wherein two ends of a cavity are communicated with a second branch flow passage, and a flow regulating mechanism is arranged on the second branch flow passage, so that the mould can be used for regulating the flow velocity of a melt flowing into the cavity, the two ends of the cavity form a resistance difference, the position of a welding line of the defect sample is further adjusted through the resistance difference, and the defect sample with different welding line positions is obtained and is used for the performance research of the defect sample.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment 1 of a mold for preparing a mechanical property defect sample according to the present invention.

Fig. 2 is a schematic structural diagram of the flow rate adjusting mechanism of the present invention.

Fig. 3 is a schematic structural view of a first cavity of the utility model.

Fig. 4 is a schematic structural view of a second cavity of the utility model.

Fig. 5 is a schematic structural view of a third cavity of the utility model.

FIG. 6 is a schematic structural view of a fourth cavity of the present invention.

FIG. 7 is a schematic structural diagram of example 2 of a mold for preparing a mechanical defect sample according to the present invention.

Fig. 8 is a schematic structural view of a flow rate adjusting mechanism disposed at any corner of a U-shaped flow channel in embodiment 3 of the mold for preparing a mechanical property defect sample according to the present invention.

Fig. 9 is a schematic structural view of a U-shaped flow channel with flow regulating mechanisms disposed at two corners in embodiment 3 of the mold for preparing a mechanical property defect sample according to the present invention.

The graphic symbols are illustrated as follows:

1-cavity plate, 2-runner, 21-main runner, 22-first sub-runner, 23-second sub-runner, 3-cavity, 31-first cavity, 311-first horizontal segment, 312-first vertical segment, 32-second cavity, 321-second horizontal segment, 322-second vertical segment, 33-third cavity, 331-third horizontal segment, 332-third vertical segment, 333-extension segment, 34-fourth cavity, 341-fourth horizontal segment, 342-fourth vertical segment, 4-flow regulating mechanism, 41-runner, 5-sprue and 6-positioning piece.

Detailed Description

The present invention will be further described with reference to the following embodiments. Wherein the showings are for the purpose of illustration only and are shown by way of illustration only and not in actual form, and are not to be construed as limiting the present patent; to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.

The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.

Example 1

Fig. 1 to 6 show a first embodiment of a mold for preparing a mechanical property defect sample according to the present invention, which includes a cavity plate 1, a runner 2 and a plurality of cavities 3 are disposed on the cavity plate 1, the runner 2 includes a main runner 21, a first sub-runner 22, and a plurality of second sub-runners 23, the plurality of second sub-runners 23 are all communicated with the main runner 21 through the first sub-runners 22, the plurality of cavities 3 are communicated with the plurality of second sub-runners 23 in a one-to-one correspondence, two ends of the cavities 3 are both communicated with the second sub-runners 23, and a flow rate adjusting mechanism 4 is disposed on the second sub-runners 23.

The melt can flow into the plurality of cavities 3 through the main runner 21, the first sub-runner 22 and the second sub-runner 23 in sequence, so that the injection molding efficiency of the mechanical property sample is improved; the both ends of die cavity 3 all are linked together with second branch runner 23, and set up the setting of flow adjustment mechanism 4 on second branch runner 23, can be used for adjusting the velocity of flow that flows into the interior fuse-element of die cavity 3, make the both ends of die cavity 3 form the resistance difference, and then realize the weld line position adjustment of defect sample through the resistance difference, obtain the defect sample that has different weld line positions for defect sample performance research. Furthermore, the flow regulating mechanism 4 is arranged on the second sub-runner 23, the flow regulating mechanism 4 is closer to the cavity 3 and far away from the melt outflow end, the length of the runner between the melt outflow end and the flow regulating mechanism 4 can be increased, when the melt outflow end is closed and the flow regulating mechanism 4 is regulated to be the minimum flow end, a small amount of melt which continuously flows out can flow in the runner between the melt outflow end and the flow regulating mechanism 4, the melt is prevented from overflowing, and the regulation convenience is improved.

As shown in fig. 1, the second branch flow channel 23 is a U-shaped flow channel, and two ends of the cavity 3 are connected and communicated with two free ends of the U-shaped flow channel through the gate 5; the flow regulating mechanism 4 is arranged at a corner of the U-shaped flow passage, in this embodiment, one flow regulating mechanism 4 is arranged, and the flow regulating mechanism 4 is arranged at any one corner of the U-shaped flow passage.

The flow regulating mechanism 4 comprises a movable member rotatably connected with the cavity plate 1, a circulation groove 41 is arranged on the movable member, and the side wall of the circulation groove 41 forms a barrier structure on the flow channel. As shown in fig. 1 and fig. 2, the movable member is rotatably inserted into the cavity plate 1, the movable member is a cylindrical structure, the circulation groove 41 is disposed at the top end of the cylindrical structure, and the cross-sectional structure of the circulation groove 41 is identical to the cross-sectional structure of the U-shaped flow channel at the position of the movable member, specifically, as shown in fig. 1, the cross-sectional structure of the circulation groove 41 at the corner of the U-shaped flow channel is a bent structure.

When the device is used, the relative coverage area between the side wall of the flow through groove 41 and the U-shaped flow channel is adjusted by rotating the movable piece, so that the flow can be adjusted, and the position of the weld line can be changed. When the side wall of the circulation groove 41 completely blocks the U-shaped flow channel, the melt flows in from only one end of the cavity 3, so that a mechanical property sample without a weld line can be prepared, and the preparation application range of the mold is improved.

In addition, a plurality of positioning pieces 6 are arranged at the edge of the cavity plate 1. As shown in fig. 1, the positioning member 6 is a recessed position disposed at the edge of the cavity plate 1. In this embodiment, four recess bits are provided, and it should be noted that the number of four is only preferable, and the number of the recess bits can be selected according to actual situations.

Besides, the cross sections of the plurality of cavities 3 are all in a T-like structure, and the plurality of cavities 3 comprise a first cavity 31, a second cavity 32, a third cavity 33 and a fourth cavity 34 which are communicated with the branch channel. As shown in fig. 1, in the present embodiment, four second branch runners 23 are provided, the four second branch runners 23 are correspondingly communicated with the first cavity 31, the second cavity 32, the third cavity 33 and the fourth cavity 34 one by one, the first branch runner 22 is in an "i" shape, the closed ends of the four second branch runners 23 are connected and communicated with four free ends of the "i" shape, and the main runner 21 is connected and communicated with the middle of the first branch runner 22. It should be noted that the U-shaped structure and the "i" shaped structure are only preferred, and the structures of the first sub-channel 22 and the second sub-channel 23 may be set according to actual situations, and are not limited herein.

As shown in fig. 3, the cross section of the first cavity 31 is a first T-shaped structure, the first T-shaped structure includes a first horizontal section 311 and a first vertical section 312 connected to the first horizontal section 311, and two sides of the first vertical section 312 are arc-shaped surfaces.

As shown in fig. 4, the second cavity 32 has a cross-section of a second T-shaped structure, the second T-shaped structure includes a second horizontal section 321 and a second vertical section 322 connected to the second horizontal section 321, and the cross-sectional area of the second vertical section 322 gradually decreases from an end close to the second horizontal section 321 to an end far from the second horizontal section 321.

As shown in fig. 5, the cross section of the third cavity 33 is a third T-shaped structure, the third T-shaped structure includes a third horizontal section 331 and a third vertical section 332 connected to the third horizontal section 331, and both sides of the third vertical section 332 are arc-shaped surfaces; the free end of the third vertical section 332 is connected to an extension section 333. As shown in fig. 2 and 4, the first cavity 31 differs from the third cavity 33 in that the extension 333 is configured such that the vertical section of the third T-shaped structure is longer than the vertical section of the first T-shaped structure.

As shown in fig. 6, the cross-section of the fourth cavity 34 is a fourth T-shaped structure, the fourth T-shaped structure includes a fourth horizontal section 341 and a fourth vertical section 342 connected to the fourth horizontal section 341, and the fourth vertical section 342 is funnel-shaped.

Example 2

This embodiment is similar to embodiment 1, except that, as shown in fig. 7, two flow rate adjusting mechanisms 4 are provided in this embodiment, and two flow rate adjusting mechanisms 4 are provided at two corners of the U-shaped flow passage, respectively. Two corners all set up flow control mechanism 4, can be convenient for operating personnel adjust the velocity of flow that flows into 3 both ends fuse-elements in die cavity respectively, improve and adjust the convenience.

Example 3

This embodiment is similar to

embodiment

1 or 2, except that the flow rate adjusting mechanism 4 is also disposed on the first branch channel 22 in this embodiment, and the flow rate adjusting mechanism 4 disposed on the first branch channel 22 can be used to adjust the flow rate of the melt flowing from the main channel 21 into the second branch channel 23. As shown in fig. 8 and 9, the structure of the flow rate adjusting mechanism 4 located on the first shunt passage 22 is similar to that of the flow rate adjusting mechanism 4 in embodiment 1, the flow rate adjusting mechanism 4 includes a movable member rotatably connected to the cavity plate 1, a flow groove 41 is provided on the movable member, and a side wall of the flow groove 41 forms a barrier structure on the flow passage. In this embodiment, the cross-sectional structure of the circulation groove 41 of the movable member located on the first subchannel 22 coincides with the cross-sectional structure of the first subchannel 22 at the position thereof, as shown in fig. 8 and 9.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The utility model provides a mould of preparation mechanical properties defect sample, its characterized in that, includes die cavity board (1), be equipped with runner (2) and a plurality of die cavity (3) on die cavity board (1), runner (2) include sprue (21), first minute runner (22), a plurality of second minute runner (23), second minute runner (23) are linked together with sprue (21) through first minute runner (22), die cavity (3) are linked together with second minute runner (23) one-to-one, the both ends of die cavity (3) all are linked together with second minute runner (23), be equipped with flow control mechanism (4) on the second minute runner (23).

2. The mold for preparing mechanical property defect samples as claimed in claim 1, wherein the flow regulating mechanism (4) is arranged on the first shunt passage (22).

3. The mold for preparing samples with mechanical property defects according to claim 2, wherein the flow rate adjusting mechanism (4) comprises a movable member rotatably connected with the cavity plate (1), the movable member is provided with a flow groove (41), and the side wall of the flow groove (41) forms a barrier structure on the flow channel.

4. The mould for preparing samples with mechanical property defects according to claim 1, characterized in that a plurality of positioning pieces (6) are arranged at the edge of the cavity plate (1).

5. The mold for preparing mechanical property defect samples according to claim 1, wherein both ends of the cavity (3) are connected with the second branch runner (23) through a gate (5).

6. The mold for preparing mechanical property defect samples according to claim 1, wherein the cavities (3) comprise a first cavity (31), a second cavity (32), a third cavity (33) and a fourth cavity (34) which are communicated with the sub-runners.

7. The mold for preparing mechanical property defect samples according to claim 6, wherein the cross section of the first cavity (31) is a first T-shaped structure, the first T-shaped structure comprises a first horizontal section (311) and a first vertical section (312) connected with the first horizontal section (311), and two sides of the first vertical section (312) are arc-shaped surfaces.

8. The mold for preparing mechanical property defect samples as claimed in claim 6, wherein the cross section of the second cavity (32) is a second T-shaped structure, the second T-shaped structure comprises a second horizontal section (321) and a second vertical section (322) connected with the second horizontal section (321), and the cross-sectional area of the second vertical section (322) is gradually reduced from one end close to the second horizontal section (321) to one end far from the second horizontal section (321).

9. The mold for preparing mechanical property defect samples according to claim 6, wherein the cross section of the third cavity (33) is a third T-shaped structure, the third T-shaped structure comprises a third horizontal section (331) and a third vertical section (332) connected with the third horizontal section (331), and two sides of the third vertical section (332) are arc-shaped surfaces; the free end of the third vertical section (332) is connected with an extension section (333).

10. The mold for preparing mechanical property defect samples according to claim 6, wherein the cross section of the fourth cavity (34) is a fourth T-shaped structure, the fourth T-shaped structure comprises a fourth horizontal section (341) and a fourth vertical section (342) connected with the fourth horizontal section (341), and the fourth vertical section (342) is funnel-shaped.