CN222727228U - A plastic child safety seat joint assembly undercut molding secondary ejection injection mold - Google Patents

Abstract

The utility model provides a secondary ejection injection mold for undercut molding of a joint component of a plastic child safety seat, comprising an upper mold, a lower mold and an ejection mechanism, wherein the ejection mechanism comprises a secondary ejection structure, and the secondary ejection structure comprises a first ejection structure and a rear ejection structure. When demoulding, the first ejection structure first ejects the entire joint component, and then the rear ejection structure is ejected for the second time through a linkage structure, and because of the position of the rear ejector rod, the joint component rotates with the undercut structure as the center of a circle, thereby demoulding the undercut structure, and the secondary ejection structure adopts a first straight ejector rod and an upper mold to integrally mold the joint component, thereby reducing the mold line generated on the undercut structure to affect the surface quality of the mold.

Description

Plastic child safety seat joint assembly back-off molding secondary ejection injection mold

Technical Field

The utility model relates to the field of molds, in particular to a plastic child safety seat joint assembly back-off molding secondary ejection injection mold.

Background

As shown in fig. 1, the joint assembly 9 of the related art plastic child safety seat comprises a round table 91 and a handle 92, when in installation, the requirement on the lateral annular surface of the round table is higher, and a back-off structure 93 is arranged at the joint of the round table and the handle, and for a similar back-off structure 93, the injection molding of the mold is carried out usually by adopting an inclined ejection structure, the inclined ejection structure comprises an inclined ejection rod and a power source, the inclined ejection rod is obliquely abutted on the mold to be carried out, the power source ejects the inclined ejection rod along the mold opening direction, the inclined ejection rod utilizes an inclined angle to enable the mold to be carried out to be obliquely ejected, the situation of the back-off structure being clamped on an upper mold and a lower mold is reduced, the mold line is generally caused to appear at the joint by adopting an inclined ejection mode, and the surface requirement of the related art plastic child safety seat joint assembly 9 is higher, and the mold line influences the quality.

Disclosure of utility model

In order to reduce the condition that a mould line appears in a back-off structure at the joint of a side ring surface and a handle in the related technology due to the adoption of an inclined top structure, the application provides a plastic child safety seat joint assembly back-off forming secondary ejection injection mould.

The application provides a plastic child safety seat joint assembly back-off molding secondary ejection injection mold which adopts the following technical scheme:

The utility model provides a plastics children safety seat joint subassembly back-off shaping secondary ejecting injection mold, includes mould, lower mould and ejection mechanism, ejection mechanism is including secondary ejection structure, secondary ejection structure includes first ejection structure and back ejection structure, first ejection structure includes first roof, first driving piece and first ejection rod and many second ejection rod, first ejection rod and many second ejection rod setting are on first roof, first driving piece is used for driving first roof and moves along the mould direction that opens and shuts, first ejection rod sets up in back-off structure below and with last mould and lower mould cooperation shaping back-off structure;

the back top structure includes second roof, second driving piece, linkage structure and back ejector pin, and the second driving piece is used for driving the second roof and moves along the mould direction that opens and shuts, back ejector pin passes the lower mould butt and keeps away from on the one end downside of handle at the joint assembly, and when taking out the mould, the structure is ejecting with the back-off structure earlier, drives back ejector pin through the linkage structure and is ejecting to the joint assembly secondary.

Through the technical scheme, when demolding is carried out, the whole joint assembly is firstly ejected by the ejection structure, then the rear ejection structure is ejected for the second time by the linkage structure, and the joint assembly rotates by taking the back ejector rod as the circle center because of the position of the back ejector rod, so that the back ejector structure is demolded, the second ejection structure adopts the first straight ejector rod and the upper die to integrally form the joint assembly, and the influence of the mold surface quality caused by the production of a mold line on the back ejector rod is reduced.

Preferably, the linkage structure comprises a linkage block and a linkage rod, the linkage block is rotationally arranged on the second top plate, a clamping groove is formed in one end of the linkage block, the rear ejector rod is arranged in the clamping groove, the linkage rod is arranged at the other end of the linkage block, and when demolding is carried out, the linkage structure moves towards the lower die along with the second top plate until the linkage rod is abutted on the lower die, and the linkage block is forced to rotate so that the rear ejector rod is secondarily ejected to the joint assembly.

Through the technical scheme, when demolding is carried out, the second driving piece drives the second top plate to move along the demolding direction, so that the linkage rod is firstly abutted on the lower die, the linkage block is forced to rotate, the rear ejector rod clamped at the other end of the linkage block is driven to move upwards, and the joint assembly is ejected out for demolding for the second time.

Preferably, the second top plate is arranged below the first top plate, the first top plate is provided with a limiting groove, the limiting groove is arranged right above the linkage block, the linkage block rotates in the limiting groove, and the rear ejector rod and the linkage column penetrate through the first top plate.

Through the technical scheme, the design of the limiting groove limits the ejection distance of the rear ejector rod, reduces the situation that the ejection amplitude of the rear ejector rod is too large to influence the subsequent die assembly, and increases the stability of the die.

Preferably, the sliding column further comprises a spring and a sliding column, one end of the sliding column penetrates through the lower die, the other end of the sliding column is arranged on the first top plate, the spring is arranged on the outer side of the sliding column, two ends of the spring are respectively arranged with the lower die and the first top plate, and the spring is always in a stretching state.

Through above-mentioned technical scheme, the design of spring makes first roof by the spring butt all the time on the second roof to can guarantee the spacing function of spacing groove on the first roof to the linkage piece, increased the stability of mould.

Preferably, the joint assembly is further provided with a reinforcing sheet on the inner side, the upper die is further provided with a fixing assembly, the fixing assembly comprises an insert column, an insert block and an insert table, the insert column and the insert column are arranged on the reinforcing sheet in a penetrating and abutting mode, the insert column is detachably arranged on the upper die, the insert column is used for forming a straight hole on a handle and parallel to a first straight ejector rod, the insert table is used for forming a round table, the insert block is inserted on the insert table, and the second straight ejector rod is abutted to the insert table

Through above-mentioned technical scheme, consolidate the piece and be used for consolidating joint assembly round platform and the joint strength of handle, insert the position that the piece can be consolidated in the restriction of the design of post and insert to consolidate the piece when conveniently moulding plastics can fix on the required position, the interior outer surface of shaping joint assembly is passed through to insert the post, insert platform and the straight ejector pin of second simultaneously, has guaranteed the precision of interior outer surface.

Preferably, the core pulling device further comprises a core pulling structure, the core pulling structure comprises a core pulling table, an air cylinder, guide posts, a sliding block and two core pulling columns, the core pulling table is obliquely arranged towards the lower die, the inclination angle of the core pulling table is the same as that of the handle, the guide posts are arranged on the core pulling table, the length direction of the guide posts is parallel to the length direction of the handle, the sliding block slides on the core pulling table through the guide posts, the core pulling columns are arranged on one end of the sliding block, which faces towards the lower die, the core pulling columns are used for forming the inner side face of the handle, the telescopic rod of the air cylinder is arranged towards the sliding block, and the air cylinder is used for driving the sliding block to slide.

Through above-mentioned technical scheme, the design of the post of loosing core has guaranteed the accurate shaping of handle internal surface, and the design of loosing core structure has guaranteed can smooth drawing of patterns to mould fashioned accuracy and stability have been improved.

Preferably, the dual switch structure comprises two process switches and two switch columns, wherein the two switch columns are arranged on the sliding block and are parallel to the length direction of the sliding block, the two switch columns are arranged in a staggered and opposite mode, the two process switches are arranged on the core pulling table, one process switch is close to the lower die, the other process switch is close to the cylinder, when core pulling operation is carried out, the switch column on one side is gradually far away from the process switch, and the switch column on the other side is gradually close to the process switch until being propped against the process switch.

By the technical scheme, when the progress switch close to one side of the core pulling block is far away from the switch column and the progress switch on the other side of the core pulling block is far away from the switch column, the secondary ejection structure starts demolding operation, otherwise, the secondary ejection structure starts mold closing operation, the core pulling structure is prevented from affecting the movement of the ejection structure in the mold releasing and closing process, and the safety of the mold during operation is ensured.

The technical effects of the utility model are mainly as follows:

1. According to the utility model, by designing the secondary ejection structure, the inverted structure at the junction of the handle and the round table is integrally formed by the first straight ejector rod and the upper die, and the secondary ejection is performed to avoid using the inclined ejection structure, so that the influence of the mold surface quality caused by the generation of mold lines on the inverted structure is reduced;

2. according to the utility model, by designing the linkage structure, the effect of secondary ejection can be automatically achieved in the demolding process;

3. According to the utility model, the first top plate, the spring and the sliding column are matched, so that the first top plate is always abutted against the second top plate, and the linkage structure can stably work in the limiting groove.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a related art;

FIG. 2 is a schematic cross-sectional view taken along line A-A in FIG. 1 in the related art;

FIG. 3 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 4 is a schematic view of a part of the structure of the upper die and a part of the cooling pipe removed according to the embodiment of the present application;

FIG. 5 is an enlarged schematic view of the portion B of FIG. 4 in accordance with an embodiment of the application;

FIG. 6 is a schematic view of a bottom portion of the structure of the present application;

FIG. 7 is a schematic cross-sectional view taken along line C-C of FIG. 6 in accordance with an embodiment of the present application;

FIG. 8 is an enlarged schematic view of the portion D of FIG. 7 in accordance with an embodiment of the application;

FIG. 9 is a schematic diagram of the overall structure of a linkage block according to an embodiment of the present application;

fig. 10 is an enlarged schematic view of fig. 4 at E in an embodiment of the present application.

Reference numerals 1, upper die, 11, injection port, 12, runner, 13, fixing component, 131, insert column, 132, insert, 133, insert table, 2, lower die, 3, ejection mechanism, 31, secondary ejection structure, 32, first ejection structure, 321, first top plate, 3211, limit groove, 322, first straight ejector rod, 323, second straight ejector rod, rear ejection structure, 331, second top plate, 332, linkage structure, 333, linkage block, 3331, clamping groove, 334, linkage rod, 335, rear ejector rod, 34, core pulling structure, 341, core pulling table, 342, cylinder, 343, guide column, 344, slider, 345, core pulling column, 35, double switch structure, 351, process switch, 352, switch column, 36, oblique ejection structure, 4, cavity, 5, spring, 6, slide column, 7, reinforcing sheet, 8, cooling pipe, 9, joint component, 91, round table, 92, handle, 93, back-off structure, 94, straight hole, 95, side hole.

Detailed Description

The following detailed description of the embodiments of the present utility model is provided with reference to fig. 1 to 10, so that the technical solution of the present utility model can be more easily understood and mastered.

The embodiment of the application discloses a plastic child safety seat two-shot ejection injection mold for back-off molding of joint assembly:

Referring to fig. 1-10, a plastic child safety seat joint assembly back-off molding secondary ejection injection mold comprises an upper mold 1, a lower mold 2 and an ejection mechanism 3, wherein the ejection mechanism 3 comprises a secondary ejection structure 31, the secondary ejection structure 31 comprises a first ejection structure 32 and a second ejection structure 33, the first ejection structure 32 comprises a first top plate 321, a first driving piece, a first straight top rod 322 and a plurality of second straight top rods 323, the first straight top rod 322 and the plurality of second straight top rods 323 are fixed on the first top plate 321, the first driving piece can be an oil cylinder or other device, the device is fixed below the first top plate 321, and a telescopic rod of the device is arranged towards the first top plate 321 and used for driving the first top plate 321 to move along the opening and closing mold direction. The first straight ejector rod 322 is arranged below the back-off structure 93 and is matched with the upper die 1 and the lower die 2 to form the back-off structure 93;

The rear roof structure 33 includes a second top plate 331, a second driving member, a linkage structure 332, and a rear roof rod 335, where the second driving member may be an oil cylinder or the like, and the device should be fixed below the second top plate 331, and a telescopic rod of the device should be disposed toward the second top plate 331 for driving the second top plate 331 to move along the mold opening and closing direction. The rear ejector rod 335 passes through the lower die 2 to be abutted on the lower side surface of one end, far away from the handle 92, of the joint assembly 9, when demolding is carried out, the inverted structure 93 is ejected out by the ejection structure 32, and the linkage structure 332 drives the rear ejector rod 335 to eject the joint assembly 9 for the second time. When demolding is carried out, the whole joint assembly 9 is firstly ejected by the ejection structure 32, then the rear ejection structure 33 is ejected for the second time through the linkage structure 332, and the joint assembly 9 rotates by taking the back-off structure 93 as the circle center because of the position of the rear ejection rod 335, so that the back-off structure 93 is demolded, the joint assembly 9 is integrally formed by the first straight ejection rod 322 and the upper die 1 through the secondary ejection structure 31, and the influence of die line generated on the back-off structure 93 on the die surface quality is reduced.

Referring to fig. 1 to 10, the linkage structure 332 includes a linkage block 333 and a linkage rod 334, the linkage block 333 rotates on the second top plate 331, a clamping groove 3331 is provided at one end of the linkage block 333, a rear ejector rod 335 is fixed in the clamping groove 3331, the linkage rod 334 is fixed at the other end of the linkage block 333, and when demolding is performed, the second driving member drives the second top plate 331 to move along the demolding direction, so that the linkage rod 334 is first abutted on the lower mold 2, thereby forcing the linkage block 333 to rotate, and driving the rear ejector rod 335 clamped at the other end of the linkage block 333 to move upwards, thereby performing second ejection demolding on the joint assembly 9.

Referring to fig. 1-10, the upper die 1, the lower die 2 and the ejection mechanism 3 together form a cavity 4 for pouring, the upper die 1 further comprises an injection port 11 and a runner 12 communicated with the injection port 11, the runner 12 is communicated with the injection port 11 and the cavity 4, the injection port 11 is connected with an external injection molding machine, and the joint assembly 9 is formed by injection molding into the cavity 4 through the runner 12.

Referring to fig. 1 to 10, the second top plate 331 is located below the first top plate 321, the first top plate 321 is provided with a limiting groove 3211, the limiting groove 3211 is located right above the linkage block 333, the linkage block 333 rotates in the limiting groove 3211, and the rear ejector rod 335 and the linkage post pass through the first top plate 321. The design of the limiting groove 3211 limits the ejection distance of the rear ejector rod 335, reduces the situation that the ejection amplitude of the rear ejector rod 335 is too large to influence the subsequent die assembly, and increases the stability of the die.

Referring to fig. 1-10, the die further comprises a spring 5 and a slide post 6, one end of the slide post 6 passes through the lower die 2, the other end of the slide post 6 is fixed on the first top plate 321, the spring 5 is fixed on the outer side of the slide post 6, two sections of the spring 5 are respectively fixed with the lower die 2 and the first top plate 321, and the spring 5 is always in a stretching state. The design of the spring 5 makes the first top plate 321 always be abutted on the second top plate 331 by the spring 5, so that the limiting function of the limiting groove 3211 on the first top plate 321 to the linkage block 333 can be ensured, and the stability of the die is improved.

Referring to fig. 1-10, the reinforcing sheet 7 is fixed on the inner side of the joint assembly 9, the fixing assembly 13 is further provided on the upper mold 1, the fixing assembly 13 includes an insert column 131, an insert 132 and an insert table 133, the insert column 131 and the insert column 131 are arranged on the reinforcing sheet 7 in a penetrating and abutting mode, the insert column 131 is arranged on the upper mold 1 in an inserting mode, the insert column 131 is used for forming a straight hole 94 parallel to the first straight ejector rod 322 on the handle 92, the insert table 133 is used for forming a round table 91, the insert 132 is arranged on the insert table 133 in an inserting mode, the second straight ejector rod 323 is arranged in the insert table 133 in an abutting mode, the insert table 133 is fixed on the upper mold 1, the reinforcing sheet 7 is used for reinforcing the connection strength between the round table 91 of the joint assembly 9 and the handle 92, the insert column 131 and the insert 132 are designed to limit the position of the reinforcing sheet 7 so that the reinforcing sheet 7 can be fixed on a required position during injection molding, and meanwhile the precision of the inner and outer surfaces of the joint assembly 9 is guaranteed through the insert column 131, the insert 132, the insert table 133 and the second straight ejector rod 323.

Referring to fig. 1-10, the upper and lower molds 2 are further internally perforated with cooling pipes 8, and the cooling pipes 8 are used for accelerating the product forming cycle, thereby being beneficial to improving the production efficiency and ensuring the product quality.

Referring to fig. 1-10, the core pulling device further includes a core pulling structure 34, the core pulling structure 34 includes a core pulling platform 341, an air cylinder 342, a guide post 343, a slider 344 and two core pulling columns 345, the core pulling platform 341 is inclined towards the lower die 2, the inclination angle of the core pulling platform 341 is the same as that of the handle 92, the guide post 343 is fixed on the core pulling platform 341, the length direction of the guide post 343 is parallel to that of the handle 92, the slider 344 slides on the core pulling platform 341 through the guide post 343, the core pulling columns 345 are fixed on one end of the slider 344 towards the lower die 2, the core pulling columns 345 are used for forming the inner side surface of the handle 92, the telescopic rod of the air cylinder 342 is arranged towards the slider 344, and the air cylinder 342 is used for driving the slider 344 to slide. The design of the core-pulling column 345 ensures the accurate molding of the inner surface of the handle 92, and the design of the core-pulling structure 34 ensures the smooth demolding, so that the molding accuracy and stability of the mold are improved.

Referring to fig. 1 to 10, the insert pillar 131 is abutted against the core-pulling pillar 345, so that interference collision caused in the core-pulling process is reduced.

Referring to fig. 1-10, the dual switch structure 35 is further included, the dual switch structure 35 includes two process switches 351 and two switch columns 352, the two switch columns 352 are fixed on the slider 344, the switch columns 352 are parallel to the length direction of the slider 344, the two switch columns 352 are arranged in a staggered and opposite mode, the two process switches 351 are fixed on the core pulling platform 341, one of the two process switches 351 is arranged close to the lower die 2, the other of the two process switches 351 is arranged close to the air cylinder 342, when core pulling operation is performed, the switch column 352 on one side is gradually far away from the process switches 351, and the switch column 352 on the other side is gradually close to the process switches 351 until the two switch columns are pressed against the process switches 351. When demolding operation is performed, the core pulling structure 34 acts firstly, when the progress switch 351 close to one side of the core pulling block is far away from the switch post 352, and the progress switch 351 far away from the core pulling block on the other side is abutted against the switch post 352, the secondary ejection structure 31 starts demolding operation, otherwise, the secondary ejection structure 31 starts mold closing operation, the core pulling structure 34 is ensured not to influence the movement of the ejection structure in the mold closing process, and the safety of the mold during operation is ensured.

Referring to fig. 1-10, the handle 92 of the articulation component 9 is provided with side holes 95, and the side holes 95 are formed and demolded by using a commercially available pitched roof structure 36.

Of course, the above is only a typical example of the utility model, and other embodiments of the utility model are also possible, and all technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of the utility model claimed.

Claims (7)

1. The utility model provides a plastics children's safety seat joint subassembly back-off shaping secondary ejection injection mold, includes mould (1), lower mould (2) and ejection mechanism (3), its characterized in that, ejection mechanism (3) are including secondary ejection structure (31), secondary ejection structure (31) are including first roof (321), first driving piece and first straight ejector pin (322) and many second straight ejector pin (323), first straight ejector pin (322) and many second straight ejector pin (323) set up on first roof (321), first driving piece is used for driving first roof (321) and moves along the direction of opening and closing the mould, first straight ejector pin (322) set up in back-off structure (93) below and with last mould (1) and lower mould (2) cooperation shaping back-off structure (93);

the back top structure (33) comprises a second top plate (331), a second driving piece, a linkage structure (332) and a back ejector rod (335), wherein the second driving piece is used for driving the second top plate (331) to move along the direction of opening and closing the die, the back ejector rod (335) passes through the lower die (2) to be abutted on the lower side face of one end, far away from the handle (92), of the joint assembly (9), and when demolding is carried out, the back top structure (93) is ejected by the first top structure (32), and the back ejector rod (335) is driven to eject the joint assembly (9) for the second time through the linkage structure (332).

2. The plastic child safety seat joint assembly back-off molding secondary ejection injection mold according to claim 1, wherein the linkage structure (332) comprises a linkage block (333) and a linkage rod (334), the linkage block (333) is rotatably arranged on the second top plate (331), a clamping groove (3331) is formed in one end of the linkage block (333), the rear ejector rod (335) is arranged in the clamping groove (3331), the linkage rod (334) is arranged at the other end of the linkage block (333), and when demolding is performed, the linkage structure (332) moves along with the second top plate (331) towards the lower mold (2) until the linkage rod (334) abuts against the lower mold (2), and the linkage block (333) is forced to rotate so that the rear ejector rod (333) ejects the joint assembly (9) secondarily.

3. The plastic child safety seat joint assembly back-off molding secondary ejection injection mold according to claim 2, wherein the second top plate (331) is arranged below the first top plate (321), a limiting groove (3211) is formed in the first top plate (321), the limiting groove (3211) is arranged right above the linkage block (333), the linkage block (333) rotates in the limiting groove (3211), and the rear ejector rod (335) and the linkage column penetrate through the first top plate (321).

4. The plastic child safety seat joint assembly back-off molding secondary ejection injection mold according to claim 3, further comprising a spring (5) and a sliding column (6), wherein one end of the sliding column (6) penetrates through the lower mold (2), the other end of the sliding column is arranged on the first top plate (321), the spring (5) is arranged on the outer side of the sliding column (6), two ends of the spring (5) are respectively arranged with the lower mold (2) and the first top plate (321), and the spring (5) is always in a stretching state.

5. The plastic child safety seat joint assembly back-off molding secondary ejection injection mold according to claim 1, wherein a reinforcing sheet (7) is further arranged on the inner side of the joint assembly (9), a fixing assembly (13) is further arranged on the upper mold (1), the fixing assembly (13) comprises an insert column (131), an insert block (132) and an insert table (133), the insert column (131) and the insert column (131) are arranged on the reinforcing sheet (7) in a penetrating and abutting mode, the insert column (131) is detachably arranged on the upper mold (1), the insert column (131) is used for forming a straight hole (94) parallel to a first straight ejector rod (322) on a handle (92), the insert table (133) is used for forming a round table (91), the insert block (132) is inserted on the insert table (133), and the second straight ejector rod (323) is arranged in the insert table (133) in an abutting mode.

6. The plastic child safety seat joint assembly back-off molding secondary ejection injection mold according to claim 1, further comprising a core pulling structure (34), wherein the core pulling structure (34) comprises a core pulling table (341), a cylinder (342), a guide pillar (343), a sliding block (344) and two core pulling columns (345), the core pulling table (341) is obliquely arranged towards the lower mold (2), the inclination angle of the core pulling table (341) is the same as that of the handle (92), the guide pillar (343) is arranged on the core pulling table (341), the length direction of the guide pillar (343) is parallel to the length direction of the handle (92), the sliding block (344) slides on the core pulling table (341) through the guide pillar (343), the core pulling columns (345) are arranged on one end of the sliding block (344) towards the lower mold (2), the sliding columns (345) are used for molding the inner side surface of the handle (92), and the telescopic rods of the cylinder (342) are arranged towards the sliding block (344), and the cylinder (342) is used for driving the sliding block (344) to slide.

7. The plastic child safety seat joint assembly back-off molding secondary ejection injection mold according to claim 6, further comprising a double switch structure (35), wherein the double switch structure (35) comprises two process switches (351) and two switch columns (352), the two switch columns (352) are arranged on the sliding block (344), the switch columns (352) are arranged parallel to the length direction of the sliding block (344), the two switch columns (352) are arranged in a staggered opposite mode, the two process switches (351) are arranged on the core pulling table (341), one switch column (352) is arranged close to the lower die (2), the other switch column (352) is arranged close to the air cylinder (342), and when core pulling operation is performed, the switch column (352) on one side is gradually far away from the process switches (351), and the switch column (352) on the other side is gradually close to the process switches (351) until being pressed against the process switches (351).