CN220638809U - Injection mold for thin-wall part - Google Patents

Abstract

The application discloses thin-walled workpiece injection mold relates to injection mold's field, including cover half and movable mould, be provided with the die cavity between cover half and the movable mould, be provided with the core on the movable mould, first spout has been seted up on the movable mould, the last one end of first spout length direction communicates to the die cavity, the core imbeds first spout and with first spout cooperation of sliding, still be provided with the drive part that is used for driving the core and slides along first spout length direction on the movable mould. The injection molding device has the effect of improving the injection molding quality of the thin-wall part.

Description

Injection mold for thin-wall part

Technical Field

The application relates to the field of injection molds, in particular to a thin-wall part injection mold.

Background

An injection mold is a tool for injection molding of plastics, the main function of which is to mold a plastic material into a desired shape under the action of heat and pressure. During injection molding, the mold is clamped on the injection molding machine, molten plastic is injected into the molding cavity, cooling and shaping are carried out in the cavity, then the movable mold and the fixed mold are separated, a product is ejected out of the cavity through the ejection system and leaves the mold, and finally the mold is closed again for next injection molding.

At present, a conventional injection mold mainly comprises a movable mold and a fixed mold, wherein the movable mold is arranged on a movable mold of an injection molding machine, and the fixed mold is arranged on a fixed mold of the injection molding machine. In injection molding, the movable mold and the fixed mold are closed to form a casting system and a cavity, and the position of the core in the cavity is fixed so that the shape of the obtained injection molding piece is fixed. When the mold is opened, the movable mold and the fixed mold are separated, and the plastic product can be taken out.

However, when the thin-wall part is manufactured, after the molten plastic is injected into the cavity, the gap at the thin-wall part is thinner, the flow channel between the core and the cavity is narrower, the filling amount of the molten plastic is easy to be insufficient, the surface of the molten plastic is easy to be coagulated in the flowing process, the flow channel is reduced, the connection at the thin-wall part of the plastic product is not tight enough, the wall thickness at the thin-wall part of the plastic product is different, and the quality is lower.

Disclosure of Invention

In order to solve the problems that when a thin-wall part is injection molded in the wire pipe technology, connection at the thin-wall part of a plastic product is not tight enough and the wall thickness at the thin-wall part of the plastic product is different, so that the quality of the plastic product is low, the application provides an injection mold for the thin-wall part.

The application provides a thin-walled part injection mold adopts following technical scheme:

the utility model provides a thin-wall part injection mold, includes cover half and movable mould, be provided with the die cavity between cover half and the movable mould, be provided with the core on the movable mould, first spout has been seted up on the movable mould, the ascending one end of first spout length direction communicates to the die cavity, the core imbeds first spout and with first spout cooperation of sliding, still be provided with the drive part that is used for driving the core and slides along first spout length direction on the movable mould.

By adopting the technical scheme, in injection molding operation, the driving part drives the mold core to slide towards the side deviating from the cavity, and at the moment, the circulation channel between the mold core and the cavity is increased; then, molten plastic is injected into the cavity. After the cavity is filled with enough molten plastic, the driving part drives the core to slide along the first chute, and the core is fed into the cavity, so that the molten plastic in the cavity is extruded and the thin-wall part is formed. By the mode, the compactness of the thin wall part of the plastic product is improved, the connection compactness of the thin wall part of the plastic product is improved, the uniformity of the thickness of the thin wall part of the plastic product is improved, and the quality of the thin wall part is improved.

Preferably, the length direction of first spout is on a parallel with the direction that movable mould and cover half kept away from each other or are close to, drive unit includes sliding block and driving piece, the sliding block is located one side that first spout deviates from the cover half, the sliding block slides and sets up on the movable mould, the slip direction of sliding block is perpendicular with the length direction of first spout, be provided with the guide slope on the sliding block, the guide slope is followed one side slope upward setting that the opposite side of sliding block direction of motion, just one side butt that the core deviates from the cover half is on the guide slope, the driving piece is used for driving the sliding block and slides.

Through adopting above-mentioned technical scheme, the movable mould is internal space narrow and small, with the core deviate from one side butt of cover half on the guide slope to with the slip of sliding block turn into the promotion to the core, help the convenience to the drive operation of core, and the convenience is to the setting operation of drive element on the movable mould.

Preferably, the sliding block is provided with a sliding rail, the sliding rail is arranged along the inclined direction of the guiding inclined plane, the side wall of the core is provided with a second sliding groove, and the sliding rail is locally embedded into the second sliding groove and is in sliding fit with the second sliding groove.

By adopting the technical scheme, the sliding rail is matched with the second sliding groove, so that the driving operation of the core exiting the cavity is realized.

Preferably, a sliding groove is formed in the movable die, and the sliding block is embedded into the sliding groove and is in sliding fit with the sliding groove.

By adopting the technical scheme, the sliding block is embedded into the sliding groove and slides along the sliding groove, so that the motion stability of the sliding block is improved.

Preferably, a limiting block is fixed at the bottom of the sliding block, a limiting groove is formed in the bottom of the sliding block, and the limiting block is embedded into the limiting groove and is in sliding fit with the limiting groove along the moving direction of the sliding block.

Through adopting above-mentioned technical scheme, the stopper can restrict the sliding range of sliding block to the removal distance of control core reduces the condition emergence that sliding block and core excessive motion and damage.

Preferably, the mold core comprises a molding body and a support column which are fixedly connected, the support column is positioned on one side of the molding body, which is away from the fixed mold, a limiting step surface facing the fixed mold is formed on the support column, a limiting block is fixed on the movable mold, and the limiting block is positioned on a movement path of the limiting step surface.

By adopting the technical scheme, the limiting block limits the movement range of the core, so that the occurrence of damage caused by excessive movement of the core is reduced.

Preferably, the first sliding groove is embedded with a sleeve, and the core penetrates through the sleeve and is in sliding fit with the sleeve.

Through adopting above-mentioned technical scheme, can appear wearing and tearing because of long-term work between core and the sleeve, after wearing and tearing appear, can change alone the sleeve, reduce injection mold's cost of maintenance, be convenient for keep whole injection mold's normal use.

Preferably, a first sealing ring is arranged between the core and the sleeve in a propping manner.

By adopting the technical scheme, the sealing performance between the mold core and the sleeve is improved, and the leakage of molten plastics is reduced.

Preferably, the core is hollow and is provided with a cooling water cavity therein, cooling water holes are formed in two opposite sides of the core, and the two cooling water holes are communicated with the cooling water cavity.

Through adopting above-mentioned technical scheme, in the operation of moulding plastics, can let in the cooling water to the cooling water intracavity to the realization is to the cooling operation of core.

Preferably, a partition plate is fixed in the cooling water cavity, the length direction of the partition plate is set along the sliding direction of the core, the length of the partition plate is smaller than the length of the cooling water cavity along the sliding direction of the core, one side of the partition plate, which is close to the fixed die, is separated from the inner wall of one side of the cooling water cavity, which is close to the fixed die, and two cooling water holes are respectively formed in two sides of the thickness direction of the partition plate.

Through adopting above-mentioned technical scheme, separate the cooling water cavity by the division board, help guaranteeing the smoothness nature that the cooling water flows in the cooling water cavity to help promoting the route that the cooling water flows, promote the effect to core cooling.

Drawings

Fig. 1 is a sectional view of a thin-walled member in the related art;

fig. 2 is an axial schematic diagram of the whole structure of the injection mold for the thin-walled part according to the embodiment;

FIG. 3 is a cross-sectional view of A-A of FIG. 2, principally embodying the structure of the mandrel and the drive member;

FIG. 4 is a cross-sectional view of B-B of FIG. 2, principally embodying the core and sleeve structure;

FIG. 5 is an enlarged view of part C of FIG. 4, principally embodying the structure of the core;

fig. 6 is a view showing a structure of the core and the driving member mainly in this embodiment.

Reference numerals: 1. a fixed mold; 11. a cavity; 2. a movable mold; 21. a die holder; 22. a mould frame; 221. a first chute; 222. a sleeve; 223. a second seal ring; 224. a limiting block; 23. an intermediate plate; 231. avoidance holes; 232. a mounting channel; 233. a cold water pipe; 24. a mounting plate; 241. a sliding groove; 3. a core; 31. shaping body; 32. a support column; 321. a first seal ring; 322. limiting the step surface; 323. a second chute; 324. a cooling water cavity; 325. a plug; 326. a partition plate; 327. a cooling water hole; 4. a driving part; 41. a sliding block; 411. a guide slope; 412. a slide rail; 413. a limit groove; 42. a driving cylinder; 5. a limiting block; 100. a thin-walled member.

Detailed Description

The present application is described in further detail below with reference to the accompanying drawings.

Referring to fig. 1, in the related art, a thin-walled member 100 has a tapered top, the thin-walled member 100 is hollow, and the thin-walled member 100 is open at a side facing away from the tapered top.

The embodiment of the application discloses a thin-wall part injection mold.

Referring to fig. 2 and 3, an injection mold for thin-walled parts comprises a fixed mold 1 and a movable mold 2, wherein the movable mold 2 comprises a mold base 21 and a mold base 22 fixed on the movable mold 2, and the mold base 22 is positioned on one side of the mold base 21 close to the fixed mold 1. A cavity 11 is arranged between the die frame 22 and the fixed die 1, a first sliding groove 221 is formed in the die frame 22, the length direction of the first sliding groove 221 is parallel to the direction in which the fixed die 1 and the movable die 2 are far away from or close to each other, one end of the first sliding groove 221 is communicated to the cavity 11, a core 3 is embedded in the first sliding groove 221, the core 3 is in sliding fit with the first sliding groove 221, and a driving part 4 for driving the core 3 to slide along the length direction of the first sliding groove 221 is further arranged on the movable die 2.

Specifically, referring to fig. 3 and 4, the first runner 221 is embedded with a sleeve 222, and the core 3 penetrates the sleeve 222 and slidably engages with the sleeve 222. The core 3 includes shaping body 31 and support column 32, and support column 32 is located the one side that shaping body 31 deviates from cover half 1, and the axis of support column 32 is parallel with the slip direction of core 3, and the lateral wall that support column 32 is close to one side of shaping body 31 is provided with first sealing washer 321 (see fig. 5) in the sidewall embedding support column 32 lateral wall of first sealing washer 321, and sleeve 222 inner wall is supported tightly in the outside of first sealing washer 321. Meanwhile, a second sealing ring 223 is sleeved on the outer side of the sleeve 222, the inner side of the second sealing ring 223 is embedded into the outer wall of the sleeve 222, and the outer side of the second sealing ring 223 abuts against the side wall of the first sliding groove 221.

Referring to fig. 4 and 5, a limiting block 224 is embedded in one side of the mold frame 22, which is away from the fixed mold 1, and the limiting block 224 is locked and fixed on the mold frame 22 through bolts, and the limiting block 224 abuts against one side of the sleeve 222, which is away from the fixed mold 1. The support column 32 is formed with a limiting step surface 322 facing the fixed mold 1, and both limiting blocks 224 are located on the movement path of the limiting step surface 322.

The movable die 2 further comprises an intermediate plate 23 fixed on one side, away from the fixed die 1, of the die frame 22, an avoidance hole 231 is formed in the middle of the intermediate plate 23, and the support column 32 penetrates through the avoidance hole 231. The core 3 is perforated from the side facing away from the fixed mold 1 to the fixed mold 1 side, so that the core 3 is hollow, and the inner side of the core 3 is formed with a cooling water cavity 324. The cooling water cavity 324 is located the opening part shutoff that deviates from cover half 1 one side and is provided with end cap 325, end cap 325 and support column 32 threaded connection, and the inboard that end cap 325 is located cooling water cavity 324 is fixed with division board 326, and the length direction of division board 326 sets up along core 3 slip direction, and the length of division board 326 is less than the length of cooling water cavity 324 along core 3 slip direction, and one side that division board 326 is close to cover half 1 and one side inner wall interval that cooling water cavity 324 is close to cover half 1. The support column 32 is located the both sides of division plate 326 thickness direction and all is provided with cooling water hole 327, and two cooling water holes 327 communicate respectively in cooling water cavity 324 and are located the both sides of division plate 326 thickness direction, and two cooling water holes 327 all are located dodge the downthehole 231. The middle plate 23 is provided with a mounting channel 232 along the axis of the cooling water hole 327, a cold water pipe 233 is arranged in the mounting channel 232 in a penetrating way, the diameter of the cold water pipe 233 is smaller than that of the mounting channel 232, one end of the cold water pipe 233 penetrates into the avoiding hole 231 and is communicated with the cooling water hole 327, and the mounting channel 232 and the cold water pipe 233 are in one-to-one correspondence with the cooling water hole 327.

Referring to fig. 3 and 6, the movable mold 2 further includes a mounting plate 24 fixed to a side of the intermediate plate 23 facing away from the fixed mold 1, and a sliding groove 241 is formed in a side of the mounting plate 24 adjacent to the intermediate plate 23, and a length direction of the sliding groove 241 is perpendicular to an axis of the support column 32. The driving member 4 includes a slide block 41, the slide block 41 is located in the slide groove 241, and the slide block 41 is slidably engaged with the slide groove 241 along the length direction of the slide groove 241. The side of the sliding block 41, which is close to the middle plate 23, is provided with a guide inclined surface 411, the guide inclined surface 411 is obliquely upward arranged from one side, which is opposite to the moving direction of the sliding block 41, of the support column 32, one side, which is away from the fixed mold 1, is parallel to the guide inclined surface 411, and one side, which is away from the fixed mold 1, of the support column 32 is abutted on the guide inclined surface 411. One side of the sliding block 41 in the width direction of the sliding groove 241 is integrally formed with a sliding rail 412, the sliding rail 412 is arranged along the inclined direction of the guiding inclined surface 411, one side of the supporting column 32 in the width direction of the sliding groove 241 is provided with a second sliding groove 323, and the sliding rail 412 is partially embedded into the second sliding groove 323 and is in sliding fit with the second sliding groove 323. The slide rails 412 are provided on both sides of the slide block 41 in the width direction of the slide groove 241, and the second slide grooves 323 are in one-to-one correspondence with the slide rails 412.

The driving part 4 further comprises a driving piece, wherein the driving piece is a driving air cylinder 42, the cylinder body of the driving air cylinder 42 is fixed on the mounting plate 24, the axis of the piston rod of the driving air cylinder 42 is parallel to the length direction of the sliding groove 241, and the piston rod of the driving air cylinder 42 extends into the sliding groove 241 and is fixed with the sliding block 41. In order to reduce the occurrence of excessive movement of the sliding block 41 and the core 3, a limiting block 5 is fixedly locked at the bottom of the sliding groove 241 through a bolt, a limiting groove 413 is formed in the bottom of the sliding block 41, and the limiting block 5 is embedded into the limiting groove 413 and is in sliding fit with the limiting groove 413 along the movement direction of the sliding block 41.

The implementation principle of the injection mold for the thin-walled part in the embodiment of the application is as follows: in injection molding operation, the driving cylinder 42 drives the sliding block 41 to move and drives the mold core 3 to slide to the side deviating from the mold cavity 11, so that a flow passage between the mold core 3 and the mold cavity 11 is increased; then, molten plastic is injected into the cavity 11. After the cavity 11 is filled with a sufficient amount of molten plastic, the driving cylinder 42 drives the core 3 to slide along the first runner 221, and the core 3 is fed into the cavity 11, so that the molten plastic in the cavity 11 is extruded and the thin-walled member 100 is molded.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (10)

1. The utility model provides a thin-wall part injection mold, includes cover half (1) and movable mould (2), be provided with die cavity (11) between cover half (1) and the movable mould (2), be provided with core (3) on movable mould (2), a serial communication port, first spout (221) on movable mould (2) have been seted up, the ascending one end of first spout (221) length direction communicates to die cavity (11), core (3) imbed first spout (221) and with first spout (221) cooperation of sliding, still be provided with on movable mould (2) and be used for driving core (3) along driving part (4) that first spout (221) length direction slided.

2. The thin-walled part injection mold according to claim 1, characterized in that the length direction of the first runner (221) is parallel to the direction in which the movable mold (2) and the fixed mold (1) are away from or close to each other, the driving part (4) includes a sliding block (41) and a driving member, the sliding block (41) is located at one side of the first runner (221) away from the fixed mold (1), the sliding block (41) is slidably disposed on the movable mold (2), the sliding direction of the sliding block (41) is perpendicular to the length direction of the first runner (221), a guiding inclined surface (411) is provided on the sliding block (41), the guiding inclined surface (411) is obliquely disposed upward from one side opposite to the one side of the moving direction of the sliding block (41), and one side of the core (3) away from the fixed mold (1) is abutted on the guiding inclined surface (411), and the driving member is used for driving the sliding block (41) to slide.

3. The thin-walled part injection mold according to claim 2, wherein the sliding block (41) is provided with a sliding rail (412), the sliding rail (412) is arranged along the inclined direction of the guiding inclined plane (411), the side wall of the core (3) is provided with a second sliding groove (323), and the sliding rail (412) is partially embedded into the second sliding groove (323) and is slidably matched with the second sliding groove (323).

4. The thin-walled part injection mold according to claim 2, wherein the movable mold (2) is provided with a sliding groove (241), and the sliding block (41) is embedded into the sliding groove (241) and slidably matched with the sliding groove (241).

5. The thin-walled part injection mold according to claim 4, wherein a limiting block (5) is fixed at the bottom of the sliding groove (241), a limiting groove (413) is formed at the bottom of the sliding block (41), and the limiting block (5) is embedded into the limiting groove (413) and is slidably matched with the limiting groove (413) along the moving direction of the sliding block (41).

6. The thin-walled part injection mold according to claim 1, characterized in that the core (3) comprises a molding body (31) and a support column (32) which are fixedly connected, the support column (32) is located at one side of the molding body (31) facing away from the fixed mold (1), a limit step surface (322) facing the fixed mold (1) is formed on the support column (32), a limit block (224) is fixed on the movable mold (2), and the limit block (224) is located on a movement path of the limit step surface (322).

7. The thin-walled part injection mold according to claim 1, characterized in that the first runner (221) is embedded with a sleeve (222), and the core (3) penetrates through the sleeve (222) and is slidably engaged with the sleeve (222).

8. The thin-walled part injection mold according to claim 7, characterized in that a first sealing ring (321) is arranged between the core (3) and the sleeve (222).

9. The thin-walled workpiece injection mold according to claim 1, wherein the core (3) is hollow and has a cooling water cavity (324) formed therein, cooling water holes (327) are formed in opposite sides of the core (3), and both the cooling water holes (327) are communicated with the cooling water cavity (324).

10. The thin-walled workpiece injection mold according to claim 9, wherein a partition plate (326) is fixed in the cooling water cavity (324), the length direction of the partition plate (326) is set along the sliding direction of the core (3), the length of the partition plate (326) is smaller than the length of the cooling water cavity (324) along the sliding direction of the core (3), one side of the partition plate (326) close to the fixed mold (1) is spaced from the inner wall of one side of the cooling water cavity (324) close to the fixed mold (1), and two cooling water holes (327) are respectively formed in two sides of the partition plate (326) in the thickness direction.