Plastic folding stool forming die based on long-stroke core-pulling technology

Abstract

The utility model provides a kind of plastic folding stool forming die based on long-stroke core-pulling technology, belong to mould technical field.It includes upper die plate and lower die plate, the upper die plate and lower die plate between formed with two for injection forming folding stool leg forming cavity, the forming cavity is by inwardly recessed setting on the stool leg forming groove of upper die plate and protruding setting on the stool leg forming block of lower die plate composition.Forming cavity can be formed by the cooperation of upper die plate stool leg forming groove and lower die plate stool leg forming block, and the stool leg of folding stool can be formed by injection molding;The composite triangular reinforcing plate forming structure on stool leg forming block can increase the overall strength of stool leg;Forming cavity both sides and inside one side clamping plate forming structure and two side clamping plate forming structure can directly form clamping plate on both sides of stool leg and stool leg top, without post-processing;Side core-pulling mechanism solves long-stroke core-pulling problem, this design improves production efficiency, reduces stool leg damage rate.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to a plastic folding stool molding mold based on long stroke core pulling technology. Background Technology

[0002] The legs of a folding stool are generally formed by injection molding. However, the strength of the legs formed by injection molding in the current technology is not high, and they are prone to damage.

[0003] For example, a Chinese patent discloses a high-strength, thick-walled plastic folding bench seat injection mold [application number: 202420834489.1], which includes an upper template, an upper mold base and an upper mold core block below the upper template, a lower mold base pressed below the upper mold base, and a lower mold core block inside the lower mold base. The lower mold core block and the upper mold core block press together to form an internal molding cavity. A support block and a lower template are provided below the lower mold base, and a top plate is provided above the lower template. Main ejector pins are provided at the four corners of the top plate, and springs are sleeved in the middle of the main ejector pins. A first straight ejector rod and a second straight ejector rod are provided in the middle of the top plate. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing a plastic folding stool molding die based on long-stroke core-pulling technology.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A plastic folding stool molding mold based on long-stroke core-pulling technology includes an upper mold plate and a lower mold plate. Two molding cavities for injection molding the stool legs are formed between the upper and lower mold plates. Each molding cavity consists of a stool leg molding groove recessed inward on the upper mold plate and a stool leg molding block protruding on the lower mold plate. The stool leg molding block is provided with a composite triangular reinforcing plate molding structure. A first side locking plate molding structure is provided on both sides of the molding cavity, and a second side locking plate molding structure is provided inside the molding cavity. The lower mold plate is also provided with a side core-pulling mechanism corresponding to the stool leg portion of the molding cavity.

[0007] In the above-mentioned plastic folding stool molding mold based on long stroke core pulling technology, the composite triangular reinforcing plate molding structure includes several reinforcing rib molding grooves recessed inward on the stool leg molding block. The two ends of the reinforcing rib molding grooves horizontally penetrate the stool leg molding block, and two adjacent reinforcing rib molding grooves are adjacent at one end and have an included angle between them.

[0008] In the above-mentioned plastic folding stool molding mold based on long stroke core pulling technology, the No. 1 side locking plate molding structure includes several first lower side locking part molding grooves arranged in a straight line along the side wall of the stool leg molding block on the lower template and several first upper side locking part molding grooves arranged in a straight line along the side wall of the stool leg molding groove on the upper template. A first locking plate slot molding block is protruding in the first upper side locking part molding groove. Several first locking plate slot molding blocks in the first upper side locking part molding groove are connected and arranged with their tops protruding from the first upper side locking part molding groove. The top surface of the first locking plate slot molding block is arc-shaped.

[0009] In the above-mentioned plastic folding stool molding mold based on long stroke core pulling technology, the first locking plate slot molding block is provided with a first positioning groove recessed in the middle, and the first lower locking part molding groove is provided with a first through-hole molding block inserted into the first positioning groove.

[0010] In the above-mentioned plastic folding stool molding mold based on long stroke core pulling technology, the second side locking plate molding structure includes a second lower side locking part molding groove recessed inward on the lower template and a number of second locking plate slot molding blocks arranged in a straight line along the inner side wall of the stool leg molding groove. The second locking plate slot molding blocks are inserted into the second lower side locking part molding groove.

[0011] In the above-mentioned plastic folding stool molding mold based on long stroke core pulling technology, a partition plate is provided between two adjacent second locking plate slot forming blocks. The two ends of the partition plate are connected to the second locking plate slot forming blocks, and the end of the partition plate abuts against the inner wall of the second lower locking part forming groove.

[0012] In the above-mentioned plastic folding stool molding mold based on long stroke core pulling technology, the second locking plate slot molding block is provided with a second positioning groove recessed in the middle, and the second lower locking part molding groove is provided with a plurality of second through-hole molding blocks corresponding to the second positioning groove on the second locking plate slot molding block.

[0013] In the above-mentioned plastic folding stool molding die based on long stroke core pulling technology, the side core pulling mechanism includes a translation slider that is slidably disposed on the lower template, and a stool leg slot forming rod that is inserted into the stool leg part is provided with a protruding inner end of the translation slider. A drive rod that is inserted into the translation slider is provided on the upper template at an incline.

[0014] In the above-mentioned plastic folding stool molding die based on long stroke core pulling technology, a top plate is provided on the lower side of the lower template, and several push rods connected to the molding cavity are fixed on the top plate.

[0015] In the above-mentioned plastic folding stool molding die based on long stroke core pulling technology, a limiting rod with a reset spring is also provided between the lower template and the top plate.

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

[0017] 1. The upper template leg forming groove and the lower template leg forming block form a forming cavity, which can be injection molded to form the legs of the folding stool; the composite triangular reinforcing plate forming structure on the leg forming block can increase the overall strength of the leg; the No. 1 side clamping plate forming structure and the No. 2 side clamping plate forming structure on both sides and inside the forming cavity can directly form clamping plates on both sides and the top of the leg, without the need for post-processing; the side core pulling mechanism solves the problem of long stroke core pulling. This design improves production efficiency and reduces the damage rate of the leg.

[0018] 2. The composite triangular reinforcing plate molding structure uses the reinforcing plate rib molding groove design on the stool leg molding block. The adjacent grooves are adjacent at one end and form an angle. After injection molding, triangular reinforcing ribs are formed. Utilizing the principle of triangle stability, the bending resistance of the stool leg is enhanced, solving the problem of insufficient strength of existing stool legs.

[0019] Other advantages, objectives and features of this invention will be partly apparent from the following description, and partly understood by those skilled in the art through study and practice of this invention. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0021] Figure 2 This is a structural diagram of the lower template;

[0022] Figure 3 This is a structural diagram of the upper template;

[0023] Figure 4 This is a partial structural schematic diagram of the present invention;

[0024] Figure 5 yes Figure 2 Enlarged view of point A in the middle;

[0025] Figure 6 yes Figure 3 Enlarged diagram of point B in the middle. Detailed Implementation

[0026] like Figures 1-5As shown, a plastic folding stool molding mold based on long-stroke core-pulling technology includes an upper mold plate 1 and a lower mold plate 2. Two molding cavities for injection molding the stool legs are formed between the upper mold plate 1 and the lower mold plate 2. The molding cavity consists of a stool leg molding groove 4 recessed inward on the upper mold plate 1 and a stool leg molding block 5 protruding on the lower mold plate 2. The stool leg molding block 5 is provided with a composite triangular reinforcing plate molding structure 6. A first side clamping plate molding structure 7 is provided on both sides of the molding cavity. A second side clamping plate molding structure 8 is provided inside the molding cavity. The lower mold plate 2 is also provided with a side core-pulling mechanism 9 corresponding to the stool leg part of the molding cavity.

[0027] In this invention, a molding cavity is formed by the upper template leg forming groove and the lower template leg forming block, which can be injection molded to form the legs of a folding stool. The composite triangular reinforcing plate forming structure on the leg forming block can increase the overall strength of the leg. The No. 1 and No. 2 side locking plate forming structures on both sides and inside the molding cavity can directly form locking plates on both sides and the top of the leg without post-processing. The side core pulling mechanism solves the problem of long-stroke core pulling. This design improves production efficiency and reduces the damage rate of the legs.

[0028] Specifically, the composite triangular reinforcing plate molding structure 6 includes several inwardly recessed reinforcing rib molding grooves 10 on the stool leg molding block 5. The two ends of each reinforcing rib molding groove 10 horizontally penetrate the stool leg molding block 5. Two adjacent reinforcing rib molding grooves 10 are adjacent at one end and form an included angle between them. Through the design of the reinforcing rib molding grooves on the stool leg molding block, adjacent grooves are adjacent at one end and form an included angle, forming triangular reinforcing ribs after injection molding. Utilizing the principle of triangular stability, this enhances the stool leg's resistance to bending and solves the problem of insufficient strength in existing stool legs.

[0029] Specifically, the No. 1 side locking plate forming structure 7 includes several first lower side locking part forming grooves 11 arranged in a straight line along the side wall of the stool leg forming block 5 on the lower template 2, and several first upper side locking part forming grooves 12 arranged in a straight line along the side wall of the stool leg forming groove 4 on the upper template 1. A first locking plate slot forming block 13 is protruding from the first upper side locking part forming groove 12. Several first locking plate slot forming blocks 13 in the first upper side locking part forming groove 12 are connected and arranged, and their tops protrude from the first upper side locking part forming groove 12. The top surface of the first locking plate slot forming block 13 is arc-shaped. The No. 1 side locking plate forming structure cooperates with the first lower side locking part forming groove of the lower template and the first upper side locking part forming groove of the upper template. The top surface of the first locking plate slot forming block of the upper template is arc-shaped. The formed locking plate structure, together with the column locking rod, can realize the assembly of the folding stool. At the same time, the multiple slots are arranged in a straight line to form multiple locking parts, and the multiple locking parts are combined to form a split locking plate, which reduces the difficulty of disassembling and assembling the column locking rod and can still be used normally even if a small number of locking parts are damaged, thus extending the service life.

[0030] Specifically, the first locking plate slot forming block 13 has a first positioning groove 14 recessed inward in the middle, and the first lower locking part forming groove 11 has a first through-hole forming block 15 protruding in the middle and inserted into the first positioning groove 14. The first positioning groove in the middle of the first locking plate slot forming block cooperates with the first through-hole forming block of the first lower locking part forming groove to achieve locking plate positioning during injection molding, ensuring the installation accuracy of the locking plate, avoiding the problem of folding stool locking failure due to positioning deviation, and also forming a through positioning interface at the bottom of the locking part, which, together with the positioning block on the column locking rod, can prevent the column locking rod and the locking plate from rotating circumferentially.

[0031] Specifically, the second side locking plate forming structure 8 includes a second lower side locking part forming groove 16 recessed inward on the lower template 2 and several second locking plate slot forming blocks 17 arranged linearly along the inner sidewall of the stool leg forming groove 4. The second locking plate slot forming blocks 17 are inserted into the second lower side locking part forming groove 16. The second side locking plate forming structure, through the cooperation between the second lower side locking part forming groove of the lower template and the second locking plate slot forming blocks of the upper template, forms a locking plate on the inner side of the stool leg through an insert-type structure, forming a two-way locking structure with the outer first side locking plate, improving the connection stability of the folding stool, and eliminating the need for additional assembly processes.

[0032] Specifically, a partition plate 18 is provided between two adjacent second locking plate slot forming blocks 17. Both ends of the partition plate 18 are connected to the second locking plate slot forming blocks 17, and the end of the partition plate 18 abuts against the inner wall of the second lower locking portion forming groove 16. The partition plate between adjacent second locking plate slot forming blocks is connected at both ends to the forming blocks and abuts against the groove wall, ensuring that the locking plate formed in the second lower locking portion forming groove 16 is also composed of multiple locking portions. This reduces the difficulty of disassembling and assembling the cylindrical locking rod and allows it to continue to function normally even with damage to a small number of locking portions, thus extending its service life.

[0033] Specifically, the second locking plate slot forming block 17 has a second positioning groove 19 recessed inward in the middle, and the second lower locking part forming groove 16 has a plurality of second through-hole forming blocks 20 corresponding to the second positioning groove 19 on the second locking plate slot forming block 17. The second positioning groove of the second locking plate slot forming block cooperates with the second through-hole forming block of the second lower locking part forming groove to realize the positioning and forming of the inner locking plate, ensure the installation accuracy of the locking plate, avoid the problem of folding stool locking failure due to positioning deviation, and also form a through positioning interface at the bottom of the locking part. With the help of the positioning block on the column locking rod, it can prevent the column locking rod and the locking plate from rotating circumferentially.

[0034] Specifically, the side core-pulling mechanism 9 includes a translation slider 21 slidably mounted on the lower template 2. The inner end of the translation slider 21 protrudes and is provided with a stool leg slot forming rod 22 that inserts into the stool leg portion. The upper template 1 is inclinedly mounted with a drive rod 23 that inserts into the translation slider 21. The side core-pulling mechanism uses the inclined drive rod of the upper template to drive the lower template translation slider and the stool leg slot forming rod to move horizontally, achieving long-stroke core pulling. This solves the problem of demolding deep cavity slots and avoids stool leg slot deformation or mold damage due to insufficient core-pulling stroke, making it suitable for molding complex structures of folding stools.

[0035] Specifically, a top plate 24 is provided on the lower side of the lower template 2, and several ejector rods 25 connected to the molding cavity are fixedly connected to the top plate 24. The top plate and ejector rods on the lower side of the lower template cooperate to eject the molded leg when the mold is opened, realizing automated demolding, reducing manual intervention, improving production efficiency, and avoiding damage to the surface of the leg caused by manual demolding.

[0036] Specifically, a limiting rod 27 with a reset spring 26 is provided between the lower mold plate 2 and the top plate 24. The limiting rod with the reset spring between the lower mold plate and the top plate pushes the top plate to reset after the ejector rod pushes out of the stool leg, ensuring the stable operation of the demolding mechanism, avoiding mold failure due to reset deviation, and extending the service life of the mold.

[0037] The working principle of this utility model is as follows: the upper template leg forming groove and the lower template leg forming block cooperate to form a forming cavity, which can be injection molded to form the legs of the folding stool; the composite triangular reinforcing plate forming structure on the leg forming block can increase the overall strength of the leg; the No. 1 side clamping plate forming structure and the No. 2 side clamping plate forming structure on both sides and inside the forming cavity can directly form clamping plates on both sides and the top of the leg, without the need for post-processing; the side core pulling mechanism solves the problem of long stroke core pulling. This design improves production efficiency and reduces the damage rate of the leg.

[0038] The composite triangular reinforcing plate molding structure uses the reinforcing plate rib molding groove design on the stool leg molding block. The adjacent grooves are adjacent at one end and form an angle. After injection molding, triangular reinforcing ribs are formed. Utilizing the principle of triangle stability, the stool leg's bending resistance is enhanced, solving the problem of insufficient strength in existing stool legs.

[0039] The No. 1 side locking plate forming structure cooperates with the first lower side locking part forming groove of the lower template and the first upper side locking part forming groove of the upper template. The top surface of the first locking plate slot forming block of the upper template is arc-shaped. The formed locking plate structure, together with the column locking rod, can realize the assembly of the folding stool. At the same time, the multiple slots are arranged in a straight line to form multiple locking parts, and multiple locking parts are combined to form a split locking plate, which reduces the difficulty of disassembling and assembling the column locking rod and can still be used normally even if a small number of locking parts are damaged, thus extending the service life. The first positioning groove in the middle of the first locking plate slot forming block cooperates with the first through-hole forming block of the first lower side locking part forming groove to realize the positioning of the locking plate during injection molding, ensuring the installation accuracy of the locking plate and avoiding the problem of folding stool locking failure due to positioning deviation. It can also form a through positioning interface at the bottom of the locking part, which, together with the positioning block on the column locking rod, can prevent the column locking rod and the locking plate from rotating circumferentially.

[0040] The No. 2 side locking plate forming structure uses the second lower side locking part forming groove of the lower template to cooperate with the second locking plate slot forming block of the upper template. The insert-type structure forms a locking plate on the inner side of the stool leg, forming a two-way locking structure with the outer No. 1 side locking plate, which improves the connection stability of the folding stool and eliminates the need for additional assembly. The two ends of the partition plate between the adjacent second locking plate slot forming blocks are connected to the forming blocks and abut against the groove wall, so that the locking plate formed in the second lower side locking part forming groove 16 is also composed of multiple locking parts. This reduces the difficulty of disassembling and assembling the column locking rod and allows it to still be used normally even if a small number of locking parts are damaged, thus extending its service life. The second positioning groove of the second locking plate slot forming block cooperates with the second through-hole forming block of the second lower side locking part forming groove to achieve the positioning and forming of the inner locking plate, ensuring the installation accuracy of the locking plate and avoiding the locking failure of the folding stool due to positioning deviation. It can also form a through positioning interface at the bottom of the locking part, which, together with the positioning block on the column locking rod, can prevent the column locking rod and the locking plate from rotating circumferentially.

[0041] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A molding die for a plastic folding stool based on long-stroke core-pulling technology, comprising an upper template (1) and a lower template (2), characterized in that, Two molding cavities for injection molding folding stool legs are formed between the upper template (1) and the lower template (2). The molding cavity consists of a stool leg molding groove (4) recessed inward on the upper template (1) and a stool leg molding block (5) protruding on the lower template (2). The stool leg molding block (5) is provided with a composite triangular reinforcing plate molding structure (6). A first side clamping plate molding structure (7) is provided on both sides of the molding cavity. A second side clamping plate molding structure (8) is provided inside the molding cavity. The lower template (2) is also provided with a side core pulling mechanism (9) corresponding to the stool leg part of the molding cavity.

2. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 1, characterized in that, The composite triangular reinforcing plate forming structure (6) includes several reinforcing rib forming grooves (10) recessed inward on the stool leg forming block (5). The two ends of the reinforcing rib forming grooves (10) horizontally penetrate the stool leg forming block (5). Two adjacent reinforcing rib forming grooves (10) are adjacent at one end and have an included angle between them.

3. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 1, characterized in that, The first side engaging plate forming structure (7) includes several first lower engaging part forming grooves (11) arranged in a straight line along the side wall of the stool leg forming block (5) on the lower template (2) and several first upper engaging part forming grooves (12) arranged in a straight line along the side wall of the stool leg forming groove (4) on the upper template (1). A first engaging plate slot forming block (13) is protruding from the first upper engaging part forming groove (12). Several first engaging plate slot forming blocks (13) in the first upper engaging part forming grooves (12) are connected and arranged with their tops protruding from the first upper engaging part forming grooves (12). The top surface of the first engaging plate slot forming block (13) is arc-shaped.

4. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 3, characterized in that, The first locking plate slot forming block (13) is recessed inward in the middle and has a first positioning groove (14). The first lower locking part forming groove (11) is protruding in the middle and has a first through-hole forming block (15) inserted into the first positioning groove (14).

5. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 3, characterized in that, The second side locking plate forming structure (8) includes a second lower side locking part forming groove (16) recessed inward on the lower template (2) and a number of second locking plate slot forming blocks (17) arranged in a straight line along the inner side wall of the stool leg forming groove (4). The second locking plate slot forming blocks (17) are inserted into the second lower side locking part forming groove (16).

6. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 5, characterized in that, A partition plate (18) is provided between two adjacent second locking plate slot forming blocks (17). The two ends of the partition plate (18) are connected to the second locking plate slot forming blocks (17), and the end of the partition plate (18) abuts against the inner wall of the second lower locking part forming groove (16).

7. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 6, characterized in that, The second locking plate slot forming block (17) is recessed inward in the middle and a second positioning groove (19) is provided. The second lower locking part forming groove (16) is provided with a plurality of second through-hole forming blocks (20) corresponding to the second positioning groove (19) on the second locking plate slot forming block (17).

8. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 1, characterized in that, The side core-pulling mechanism (9) includes a translation slider (21) slidably disposed on the lower template (2), and a stool leg slot forming rod (22) protruding from the inner end of the translation slider (21) and inserted into the stool leg. A drive rod (23) inserted into the translation slider (21) is inclinedly disposed on the upper template (1).

9. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 1, characterized in that, The lower template (2) is provided with a top plate (24) on its lower side, and a number of top rods (25) connected to the forming cavity are fixed on the top plate (24).

10. The plastic folding stool molding die based on long-stroke core-pulling technology according to claim 9, characterized in that, A limiting rod (27) with a reset spring (26) is also provided between the lower template (2) and the top plate (24).

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