Ergonomic plastic stool injection mold

Abstract

This utility model provides an ergonomic plastic stool injection mold, belonging to the field of mold technology. It includes an upper mold plate and a lower mold plate, with a first molding cavity for injection molding a first stool base and a second molding cavity for injection molding a second stool base located between the upper and lower mold plates. The first molding cavity consists of a first stool base molding groove recessed inward on the upper mold plate and a first stool base molding block protruding on the lower mold plate. The first and second molding cavities can respectively injection mold the first and second stool bases. The stool base locking plate molding structure, stool base connecting column molding structure, and stool leg connecting column molding structure can simultaneously mold the stool base locking plate, stool base connecting column, and stool leg connecting column during injection molding, achieving integrated molding of multiple components. The bottom glue inlet structure allows the glue to enter from the bottom of the molding cavity, moving the glue outlet to the back of the product, avoiding the glue outlet appearing on the outer surface, and improving the surface quality of the product.

Description

Technical Field

[0001] This utility model belongs to the field of mold technology and relates to an ergonomic plastic stool injection mold. Background Technology

[0002] The seat of a folding plastic stool is generally injection molded. In the existing technology, the injection mechanism of the mold injects the glue directly from the top of the molding cavity into the molding cavity during injection molding, and the glue outlet is formed on the outer surface of the product, which will affect the quality of the outer surface of the product.

[0003] For example, a Chinese patent discloses a plastic injection molding mold base based on preventing dragging of reinforcing ribs during demolding [application number: 201811214609.3], which includes a plastic mold shell plate, a pin column, a sleeve ejector, a base pad, a base, a torsion spring column, and a liner plate. There are two base pads, which are respectively attached to the lower left and right corners of the sleeve ejector. There are two torsion spring columns, which are respectively inserted into the upper left and right corners of the liner plate. This invention realizes the use of the plastic mold shell plate and the sleeve ejector to cooperate. Utility Model Content

[0004] The purpose of this invention is to address the above-mentioned problems by providing an ergonomic injection mold for a plastic stool.

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

[0006] An ergonomic plastic stool injection mold includes an upper mold and a lower mold. Between the upper and lower molds are a first molding cavity for forming a first stool seat and a second molding cavity for forming a second stool seat. The first molding cavity consists of a first stool seat forming groove recessed inward on the upper mold and a first stool seat forming block protruding on the lower mold. The second molding cavity consists of a second stool seat forming groove recessed inward on the upper mold and a second stool seat forming block protruding on the lower mold. The outer side of the first molding cavity has a stool seat engaging plate forming structure for forming a stool seat engaging plate inside the first stool seat. The outer side of the second molding cavity has a stool seat connecting column forming structure for forming a stool seat connecting column corresponding to the stool seat engaging plate inside the second stool seat. The inner sides of the first and second molding cavities also have stool leg connecting column forming structures for forming stool leg connecting columns outside the first and second stool seats. A bottom injection structure is also provided between the first and second molding cavities.

[0007] In the aforementioned ergonomic plastic stool injection mold, the bottom injection structure includes an injection block embedded in the lower mold plate. The injection block has an injection port in the middle that is connected to the injection tube on the upper mold plate. Bottom injection channels are symmetrically arranged on both sides of the injection port and are respectively connected to the first molding cavity and the second molding cavity. The bottom injection channels are arc-shaped inside the injection block, and the outlet of the bottom injection channel is located on the top surface of the injection block.

[0008] In the aforementioned ergonomic plastic stool injection mold, the injection block consists of two symmetrically arranged inserts, and the bottom injection channel is located on the inner wall of the insert.

[0009] In the aforementioned ergonomic plastic stool injection mold, the insert is detachably fixed to the lower template by several bolts.

[0010] In the aforementioned ergonomic plastic stool injection mold, the stool seat locking plate forming structure includes several lower locking plate forming grooves arranged along the outer side of the first stool seat forming block and several upper locking plate forming grooves arranged along the outer side of the first stool seat forming groove. The cross-sections of the upper locking plate forming grooves and the lower locking plate forming grooves are arc-shaped, and a locking plate slot forming block is protruding from the lower locking plate forming groove.

[0011] In the aforementioned ergonomic plastic stool injection mold, the stool connecting column forming structure includes a lower stool connecting column forming groove arranged in a straight line along the outer side of the second stool forming block and an upper stool connecting column forming groove arranged in a straight line along the outer side of the second stool forming groove. The cross-sections of the upper stool connecting column forming groove and the lower stool connecting column forming groove are both semi-circular.

[0012] In the aforementioned ergonomic plastic stool injection mold, the outer side of the No. 2 stool base molding block is provided with several stool base connecting column reinforcing plate forming grooves that are connected to the lower stool base connecting column forming grooves.

[0013] In the aforementioned ergonomic plastic stool injection mold, the stool leg connecting column molding structure includes a lower stool leg connecting column molding groove arranged in a straight line along the inner side of the first stool seat molding block and the second stool seat molding block, and several stool leg connecting column molding blocks arranged in a straight line along the first stool seat molding groove and the second stool seat molding groove. The bottom of the stool leg connecting column molding block is recessed inward and has an upper stool leg connecting column molding groove. The cross-sections of the upper stool leg connecting column molding groove and the lower stool leg connecting column molding groove are both circular.

[0014] In the aforementioned ergonomic plastic stool injection mold, the No. 1 stool base molding block and the No. 2 stool base molding block are also provided with triangular reinforcing plate molding structures.

[0015] In the aforementioned ergonomic plastic stool injection mold, the triangular reinforcing plate forming structure includes several inwardly recessed stool reinforcing plate rib forming grooves on the first stool forming block and the second stool forming block, with an included angle between adjacent stool reinforcing plate rib forming grooves.

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

[0017] 1. Molding cavities No. 1 and No. 2 can be injection molded to form the first and second stool bases respectively. The stool base clamping plate molding structure, stool base connecting column molding structure, and stool leg connecting column molding structure can be simultaneously molded during injection molding, realizing the integrated molding of multiple parts. The bottom glue inlet structure allows the glue to enter from the bottom of the molding cavity, moving the glue outlet to the back of the product, avoiding the glue outlet appearing on the outer surface, and improving the outer surface quality of the product.

[0018] 2. In the bottom injection structure, the injection block is embedded on the lower template, and the injection port is connected to the injection tube. The symmetrical arc-shaped bottom injection channels on both sides evenly introduce the glue into the first and second molding cavities. The outlet is located on the top surface of the injection block, which allows the glue to enter the cavities smoothly from the bottom of the first and second molding cavities, reducing the flow resistance and turbulence of the glue, ensuring uniform filling of the glue, and making the glue outlet form on the back of the product, avoiding the glue outlet appearing on the outer surface, thus improving the quality of the outer surface of the product.

[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 cross-sectional view of the present invention;

[0021] Figure 2 This is a schematic diagram of the lower template structure when the first and second stools are not demolded;

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

[0023] Figure 4 This is a structural diagram of the lower template from another direction;

[0024] Figure 5 This is a structural diagram of the upper template;

[0025] Figure 6 This is a schematic diagram of the inlay structure;

[0026] Figure 7 yes Figure 3 Enlarged view of point A in the middle;

[0027] Figure 8 yes Figure 4 Enlarged view of point B in the middle;

[0028] Figure 9 yes Figure 5 Enlarged view of point C in the middle;

[0029] Figure 10 This is a structural diagram of the first and second stool bases. Detailed Implementation

[0030] like Figures 1-10 As shown, an ergonomic plastic stool injection mold includes an upper mold plate 1 and a lower mold plate 2. A first molding cavity 4 for injection molding a first stool seat 3 and a second molding cavity 6 for injection molding a second stool seat 5 are provided between the upper mold plate 1 and the lower mold plate 2. The first molding cavity 4 consists of a first stool seat forming groove 7 recessed inwardly on the upper mold plate 1 and a first stool seat forming block 8 protruding on the lower mold plate 2. The second molding cavity 6 consists of a second stool seat forming groove 9 recessed inwardly on the upper mold plate 1 and a second stool seat forming block 10 protruding on the lower mold plate 2. The first molding cavity 4 is provided with a stool engagement plate forming structure 12 for forming a stool engagement plate 11 inside the first stool seat 3 on the outside. The second molding cavity 6 is provided with a stool connecting column forming structure 14 for forming a stool connecting column 13 corresponding to the stool engagement plate 11 inside the second stool seat 5 on the outside. The first molding cavity 4 and the second molding cavity 6 are also provided with a stool leg connecting column forming structure 16 for forming stool leg connecting columns 15 outside the first stool seat 3 and the second stool seat 5 on the inside. The first molding cavity 4 and the second molding cavity 6 are also provided with a bottom glue inlet structure 17.

[0031] In this invention, the first molding cavity and the second molding cavity can be injection molded to form the first stool base and the second stool base respectively. The stool base clamping plate molding structure, the stool base connecting column molding structure and the stool leg connecting column molding structure can be simultaneously molded during injection molding, realizing the integrated molding of multiple parts. The bottom glue inlet structure allows the glue to enter from the bottom of the molding cavity, moving the glue outlet to the back of the product, avoiding the glue outlet appearing on the outer surface, and improving the quality of the outer surface of the product.

[0032] Specifically, the bottom injection structure 17 includes an injection block 18 embedded in the lower template 2. The injection block 18 has an injection port 20 in the middle that is connected to the injection tube 19 on the upper template 1. The injection port 20 has bottom injection channels 21 symmetrically arranged on both sides, which are connected to the first molding cavity 4 and the second molding cavity 6 respectively. The bottom injection channels 21 are arc-shaped inside the injection block 18, and the outlet 22 of the bottom injection channels 21 is located on the top surface of the injection block 18. In the bottom injection structure, the injection block is embedded in the lower template, and the injection port is connected to the injection tube. The symmetrical arc-shaped bottom injection channels on both sides evenly introduce the glue into the first and second molding cavities. The outlet is located on the top surface of the injection block, which allows the glue to enter the cavities smoothly from the bottom of the first and second molding cavities, reducing the flow resistance and turbulence of the glue, ensuring uniform filling of the glue, and making the glue outlet form on the back of the product, avoiding the glue outlet appearing on the outer surface, thus improving the quality of the outer surface of the product.

[0033] Preferably, the injection block 18 consists of two symmetrically arranged inserts 23, with the bottom injection channel 21 located on the inner wall of the insert 23. This structure, consisting of two symmetrical inserts and the bottom injection channel located on the inner wall of the insert, facilitates manufacturing and reduces mold processing difficulty. Furthermore, the symmetrical arrangement of the inserts ensures the symmetry of the injection channel, resulting in a more balanced delivery of the adhesive to both molding cavities and ensuring consistent molding effects between the two mold bases.

[0034] Preferably, the insert 23 is detachably fixed to the lower mold plate 2 by several bolts. The detachable fixing of the insert to the lower mold plate by bolts facilitates the installation, removal and maintenance of the injection block. When the injection channel is worn or blocked, the insert can be quickly removed for cleaning or replacement, shortening mold maintenance time, improving production efficiency and reducing maintenance costs.

[0035] Specifically, the stool seat locking plate forming structure 12 includes several lower locking plate forming grooves 24 arranged along the outer side of the first stool seat forming block 8 and several upper locking plate forming grooves 25 arranged along the outer side of the first stool seat forming groove 7. The cross-sections of the upper locking plate forming grooves 25 and the lower locking plate forming grooves 24 are arc-shaped, and a locking plate slot forming block 26 protrudes from the lower locking plate forming groove 24. In the stool seat locking plate forming structure, the upper and lower locking plate forming grooves arranged along the outer side of the first stool seat forming block and the first stool seat forming groove have arc-shaped cross-sections. With the locking plate slot forming block in the lower locking plate forming groove, a locking plate with a precise structure and slot can be formed on the inner side of the stool seat. The arc-shaped cross-section design makes the locking plate forming more in line with the usage requirements and enhances the stability and reliability of the stool seat when locking.

[0036] Specifically, the stool connecting column forming structure 14 includes a lower stool connecting column forming groove 27 arranged in a straight line along the outer side of the second stool forming block 10 and an upper stool connecting column forming groove 28 arranged in a straight line along the outer side of the second stool forming groove 9. The cross-sections of the upper stool connecting column forming groove 28 and the lower stool connecting column forming groove 27 are both semi-circular. In the stool connecting column forming structure, the upper and lower stool connecting column forming grooves, which are arranged in a straight line along the outer side of the second stool forming block and the second stool forming groove, have semi-circular cross-sections, which can form connecting columns corresponding to the stool locking plates. The straight line arrangement facilitates the orderly arrangement of connecting columns on the stool, and the semi-circular cross-section makes the fit between the connecting columns and the locking plates tighter, improving the firmness of the connection between the stools.

[0037] Specifically, the outer side of the second stool base molding block 10 is provided with several stool base connecting column reinforcing plate forming grooves 29 that are connected to the lower stool base connecting column forming grooves 27. The stool base connecting column reinforcing plate forming grooves on the outer side of the second stool base molding block, connected to the lower stool base connecting column forming grooves, allow for the formation of reinforcing plates at the connecting columns, enhancing the structural strength of the connecting columns, preventing breakage due to stress during use, and improving the overall stability of the plastic stool structure.

[0038] Specifically, the stool leg connecting column forming structure 16 includes a lower stool leg connecting column forming groove 30 arranged in a straight line along the inner sides of the first stool base forming block 8 and the second stool base forming block 10, and several stool leg connecting column forming blocks 31 arranged in a straight line along the first stool base forming groove 7 and the second stool base forming groove 9. The bottom of each stool leg connecting column forming block 31 is recessed inwards to form an upper stool leg connecting column forming groove 32. Both the upper stool leg connecting column forming groove 32 and the lower stool leg connecting column forming groove 30 have circular cross-sections. In the stool leg connecting column forming structure, the lower stool leg connecting column forming groove arranged in a straight line along the inner sides of the first and second stool base forming blocks, in conjunction with the stool leg connecting column forming blocks arranged along the first and second stool base forming grooves and the upper stool leg connecting column forming groove at the bottom, can form a stool leg connecting column with a circular cross-section. The straight line arrangement and circular cross-section make the stool leg connecting column easy to install, distribute the force evenly, and better bear the load transmitted by the stool leg, ensuring the stability of the connection between the plastic stool and the stool leg.

[0039] Preferably, the first stool base molding block 8 and the second stool base molding block 10 are further provided with a triangular reinforcing plate molding structure 33. The triangular reinforcing plate molding structure on the first and second stool base molding blocks can form a triangular reinforcing plate on the back of the stool base. By utilizing the stability of the triangle, the structural strength and rigidity of the stool base are enhanced, the deformation of the stool base during use is reduced, and the load-bearing capacity and service life of the plastic stool are improved.

[0040] Specifically, the triangular reinforcing plate forming structure 33 includes several inwardly recessed reinforcing plate forming grooves 34 on the first and second stool forming blocks 8 and 10, respectively, with an included angle between adjacent reinforcing plate forming grooves 34. In the triangular reinforcing plate forming structure, the reinforcing plate forming grooves are inwardly recessed on the first and second stool forming blocks, and there is an included angle between adjacent grooves. This allows reinforcing plates with a certain included angle to be formed on the stool. This design can enhance the strength of the stool from multiple directions, effectively disperse the pressure on the stool, further improve the structural stability of the stool, and optimize the overall mechanical properties of the plastic stool.

[0041] The working principle of this utility model is as follows: the No. 1 molding cavity and the No. 2 molding cavity can be injection molded to form the first stool base and the second stool base respectively. The stool base clamping plate molding structure, the stool base connecting column molding structure and the stool leg connecting column molding structure can be simultaneously molded during injection molding to realize the integrated molding of multiple parts. The bottom glue inlet structure allows the glue to enter from the bottom of the molding cavity, moving the glue outlet to the back of the product, avoiding the glue outlet appearing on the outer surface, and improving the quality of the outer surface of the product.

[0042] In the bottom-gluing structure, the gushing block is embedded in the lower mold plate, and the gushing port is connected to the injection tube. Symmetrical arc-shaped bottom gushing channels on both sides evenly guide the glue into the first and second molding cavities. The outlet is located on the top surface of the gushing block, allowing the glue to smoothly enter the cavities from the bottom, reducing flow resistance and turbulence, ensuring uniform glue filling, and ensuring the outlet forms on the back of the product, preventing it from appearing on the outer surface and improving the surface quality. The gushing block consists of two symmetrical inserts, with the bottom... The injection channel is located on the inner wall of the insert. This structure is easy to process and manufacture, which can reduce the difficulty of mold processing. At the same time, the symmetrical arrangement of the inserts can ensure the symmetry of the injection channel, making the delivery of glue to the two molding cavities more balanced, ensuring that the molding effect of the two seats is consistent. The inserts can be detachably fixed to the lower template by bolts, which facilitates the installation, removal and maintenance of the injection block. When the injection channel is worn or blocked, the inserts can be quickly removed for cleaning or replacement, shortening the mold maintenance time, improving production efficiency and reducing maintenance costs.

[0043] In the stool base clamping plate forming structure, the upper and lower clamping plate forming grooves, located along the outer edges of the No. 1 stool base forming block and the No. 1 stool base forming groove, have arc-shaped cross-sections. These, in conjunction with the clamping plate slot forming block within the lower clamping plate forming groove, allow for the formation of a precisely structured clamping plate with slots on the inner side of the stool base. The arc-shaped cross-section design makes the clamping plate forming more closely fit the usage requirements, enhancing the stability and reliability of the stool base clamping. In the stool base connecting column forming structure, the upper and lower stool base connecting column forming grooves, located in a straight line along the outer edges of the No. 2 stool base forming block and the No. 2 stool base forming groove, have semi-circular cross-sections. These allow for the formation of connecting columns corresponding to the stool base clamping plates. The straight line arrangement facilitates the orderly arrangement of the connecting columns on the stool base, while the semi-circular cross-section ensures a tighter fit between the connecting columns and the clamping plates, improving the robustness of the connection between the stool bases. The outer edge of the No. 1 stool base molding block is provided with a stool base connecting column reinforcing rib molding groove that connects to the lower stool base connecting column molding groove. This allows for the formation of reinforcing ribs at the connecting column, enhancing its structural strength and preventing breakage under stress during use. This improves the overall stability of the plastic stool structure. In the stool leg connecting column molding structure, the lower stool leg connecting column molding groove, which is linearly arranged along the inner edges of the No. 1 and No. 2 stool base molding blocks, cooperates with the stool leg connecting column molding blocks along the No. 1 and No. 2 stool base molding grooves and the upper stool leg connecting column molding groove at the bottom to form a circular cross-section stool leg connecting column. The linear arrangement and circular cross-section facilitate installation, ensure even stress distribution, and better withstand the load transmitted by the stool legs, guaranteeing the stability of the connection between the plastic stool and the stool legs.

[0044] 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. An ergonomic plastic stool injection mold, comprising an upper mold plate (1) and a lower mold plate (2), characterized in that, A first molding cavity (4) for injection molding a first seat (3) and a second molding cavity (6) for injection molding a second seat (5) are provided between the upper mold (1) and the lower mold (2). The first molding cavity (4) consists of a first seat molding groove (7) recessed inward on the upper mold (1) and a first seat molding block (8) protruding on the lower mold (2). The second molding cavity (6) consists of a second seat molding groove (9) recessed inward on the upper mold (1) and a second seat molding block (10) protruding on the lower mold (2). The outer side of the first molding cavity (4) is provided with a... A stool seat clamping plate forming structure (12) is formed on the inner side of the first stool seat (3) to form a stool seat clamping plate (11). A stool seat connecting column forming structure (14) is provided on the outer side of the second forming cavity (6) to form a stool seat connecting column (13) corresponding to the stool seat clamping plate (11) on the inner side of the second stool seat (5). A stool leg connecting column forming structure (16) is also provided on the inner side of the first forming cavity (4) and the second forming cavity (6) to form a stool leg connecting column (15) on the outer side of the first stool seat (3) and the second stool seat (5). A bottom glue inlet structure (17) is also provided between the first forming cavity (4) and the second forming cavity (6).

2. The ergonomic plastic stool injection mold according to claim 1, characterized in that, The bottom injection structure (17) includes an injection block (18) embedded in the lower template (2). The injection block (18) has an injection port (20) in the middle that is connected to the injection tube (19) on the upper template (1). The injection port (20) has bottom injection channels (21) symmetrically arranged on both sides that are connected to the first molding cavity (4) and the second molding cavity (6), respectively. The bottom injection channels (21) are arranged in an arc shape inside the injection block (18). The outlet (22) of the bottom injection channel (21) is located on the top surface of the injection block (18).

3. The ergonomic plastic stool injection mold according to claim 2, characterized in that, The glue inlet block (18) consists of two symmetrically arranged inserts (23), and the bottom glue inlet channel (21) is located on the inner wall of the insert (23).

4. The ergonomic plastic stool injection mold according to claim 3, characterized in that, The insert (23) is detachably fixed to the lower template (2) by a number of bolts.

5. The ergonomic plastic stool injection mold according to claim 1, characterized in that, The stool seat clamping plate forming structure (12) includes several lower clamping plate forming grooves (24) arranged along the outer side of the first stool seat forming block (8) and several upper clamping plate forming grooves (25) arranged along the outer side of the first stool seat forming groove (7). The cross-sections of the upper clamping plate forming grooves (25) and the lower clamping plate forming grooves (24) are arc-shaped. A clamping plate slot forming block (26) is protruding from the lower clamping plate forming groove (24).

6. The ergonomic plastic stool injection mold according to claim 5, characterized in that, The stool connecting column forming structure (14) includes a lower stool connecting column forming groove (27) arranged in a straight line along the outer side of the second stool forming block (10) and an upper stool connecting column forming groove (28) arranged in a straight line along the outer side of the second stool forming groove (9). The cross-sections of the upper stool connecting column forming groove (28) and the lower stool connecting column forming groove (27) are both semi-circular.

7. The ergonomic plastic stool injection mold according to claim 6, characterized in that, The second stool forming block (10) has several stool connecting column reinforcing plate forming grooves (29) connected to the lower stool connecting column forming grooves (27) on its outer side.

8. The ergonomic plastic stool injection mold according to claim 1, characterized in that, The stool leg connecting column forming structure (16) includes a lower stool leg connecting column forming groove (30) arranged in a straight line along the inner side of the first stool seat forming block (8) and the second stool seat forming block (10), and several stool leg connecting column forming blocks (31) arranged in a straight line along the first stool seat forming groove (7) and the second stool seat forming groove (9). The bottom of the stool leg connecting column forming block (31) is recessed inward and provided with an upper stool leg connecting column forming groove (32). The cross-sections of the upper stool leg connecting column forming groove (32) and the lower stool leg connecting column forming groove (30) are both circular.

9. The ergonomic plastic stool injection mold according to claim 1, characterized in that, The No. 1 stool forming block (8) and the No. 2 stool forming block (10) are also provided with triangular reinforcing plate forming structures (33).

10. The ergonomic plastic stool injection mold according to claim 9, characterized in that, The triangular reinforcing plate forming structure (33) includes several inwardly recessed bench reinforcing plate forming grooves (34) on the first bench forming block (8) and the second bench forming block (10), with an included angle between two adjacent bench reinforcing plate forming grooves (34).

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