Multi-angle long core-pulling mechanism of rattan-imitated plastic chair mold

Abstract

The utility model provides a multi-angle long core-pulling mechanism of a rattan-imitated plastic chair mold, and belongs to the field of injection molds. The mold comprises a base, a chair seat mold core is arranged on the base, a chair seat molding surface is arranged on the chair seat mold core, two chair handle mold cores are further arranged on the base, chair handle molding surfaces are arranged on the chair handle mold cores, and the two chair handle mold cores are located on the two sides of the chair seat mold core respectively and abut against the chair seat mold core. The seat molding surface is connected with the seat handle molding surface, the seat handle mold core and the seat molding surface are connected with the seat handle molding surface, the seat handle mold core and the seat molding surface are in sliding connection with the base, and an ejection mechanism is further arranged on the base. The rattan-imitated plastic chair with complex design is demolded through multi-directional movement, and compared with a traditional ejection mode, plastic parts are less prone to being damaged, and the yield is increased.

Description

Technical Field

[0001] The utility model belongs to the field of injection molds, in particular to a multi-angle long core-pulling mechanism of a rattan-like plastic chair mold. Background Art

[0002] Plastic chairs are generally injection molded using a plastic mold in one step. They have the advantages of fast processing speed, low cost, and recyclability. They are widely used in hotels, tourist attractions, conference rooms, and homes. However, due to the large size of plastic chairs, the contact area between them and the molded surface is large during demolding. In addition, the presence of chair backs, legs, and chair handles requires multiple demolding processes. When special patterns, such as imitation rattan patterns, are required on the outer surface of the plastic chair, the demolding design requires even more complex design. Therefore, using traditional demolding methods can easily lead to difficulties in demolding the plastic parts, and even cause the plastic parts to bend and break during demolding.

[0003] For example, a Chinese patent document discloses a cross-filling two-color plastic chair one-piece injection mold [patent application number: CN201711273042.2], which includes an upper and a lower composite plate, a first runner plate, a first cavity, a second runner plate and a second cavity are arranged under the upper composite plate, the first runner plate is connected to the first gate, the second runner plate is connected to the second gate, a chair back panel and a seat panel are arranged in the first cavity, a first color groove and a second color convex block of the chair back are made in the chair back panel, and a seat panel is made in the seat panel. The first color groove is on the plate and the second color protrusion is on the seat plate. The first and second cores are set on the lower plate. The first and second cores are respectively equipped with an upper ejection cylinder, a side pumping cylinder and a slider. The piston rod of the side pumping cylinder is connected to the slider. The upper inclined groove of the slider is connected to the lower inclined slide rail of the second color lifting block. The first and second cores are respectively equipped with a chair back insert and a seat plate insert. The chair back insert has a second color lifting groove. The lower part of the seat plate insert is connected to the piston rod of the upper ejection cylinder. An ejection cylinder is set on one side of the seat plate insert. The ejection cylinder piston rod cooperates with the plastic chair. However, the demolding method of this mold still uses the traditional ejection method, which can easily cause damage to the plastic part during the demolding process. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems and provide a multi-angle long core-pulling mechanism for a rattan-like plastic chair mould.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A multi-angle long core-pulling mechanism of a rattan-like plastic chair mold includes a base, the base is provided with a seat core, the seat core is provided with a seat molding surface, the base is also provided with two chair handle cores, the chair handle cores are provided with a chair handle molding surface, the two chair handle cores are respectively located on both sides of the seat core and are offset from the seat core, the seat molding surface is connected to the chair handle molding surface, the chair handle core and the seat core are slidably connected to the base, and the base is also provided with an ejection mechanism.

[0007] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, the chair handle molding surface includes a plurality of imitation rattan grooves, the placement direction of the imitation rattan grooves is consistent with the moving direction of the chair handle core, and the chair handle core approaches or moves away from the seat core along the direction of the imitation rattan grooves.

[0008] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, the ejection mechanism includes two inclined ejector rods, each of which corresponds to a chair handle core. The two inclined ejector rods are located on both sides of the chair seat core, and the inclined ejector rods extend between the chair handle molding surface and the chair seat molding surface.

[0009] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, the ejection mechanism also includes a linear drive arranged on the base, the output shaft of the linear drive is tilted, and the output shaft of the linear drive is connected to the seat core.

[0010] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, the inclination angle of the inclined ejector rod is smaller than the curve angle of the output shaft of the linear drive. During the demoulding process, the inclined ejector rod gradually moves away from the chair seat core.

[0011] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, the base is further provided with a plurality of guide shafts slidably connected to the seat core.

[0012] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, two stool foot forming rods are also provided on the side of the chair seat core away from the inclined top rod, and a stool foot forming cavity is formed between the stool foot forming rods and the corresponding chair handle cores, and the stool foot forming rods are connected to the transverse movement mechanism arranged on the base.

[0013] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, the transverse movement mechanism includes a transverse movement block, the stool leg forming rod is fixed on the transverse movement block, the transverse movement block is slidably connected to the base, and the transverse movement block can move away from or approach the seat core along the horizontal direction of the seat core.

[0014] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, the chair handle core is provided with an injection groove, which extends from the top of the chair handle core to its bottom near the side of the stool leg forming rod, and the injection groove is connected to a plurality of injection ports.

[0015] In the multi-angle long core-pulling mechanism of the above-mentioned imitation rattan plastic chair mold, the chair handle core is slidably arranged on the guide rod, and the guide rod is fixed on the base.

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

[0017] 1. The seat core and chair handle core used for molding in this mold move during the demoulding process. The complexly designed imitation rattan plastic chair can be demoulded through multi-directional movement. Compared with the traditional ejection method, it is less likely to damage the plastic parts and improve the yield rate.

[0018] 2. Multiple injection ports are arranged to help complete injection quickly and prevent delamination or expansion and bending caused by different cooling speeds.

[0019] 3. The inclination angle of the inclined ejector is smaller than the curve angle of the output shaft of the linear drive, which causes the plastic part and the seat core to be misaligned during the ejection process, eventually causing the plastic part to be disconnected from the seat core and demolded under the ejection of the inclined ejector. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure;

[0021] Figure 2 yes Figure 1 Schematic diagram of the other direction;

[0022] Figure 3 yes Figure 1 An enlarged schematic diagram of the chair handle molding surface;

[0023] Figure 4 yes Figure 2 An enlarged schematic diagram of the stool leg molding cavity.

[0024] In the figure: base 10, seat core 11, seat molding surface 12, handle core 13, handle molding surface 14, ejector mechanism 15, imitation rattan groove 16, inclined ejector rod 17, linear drive 18, guide shaft 19, stool leg molding rod 20, stool leg molding cavity 21, transverse movement mechanism 22, transverse movement block 23, injection groove 24, injection port 25, guide rod 26. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0026] The utility model provides a multi-angle long core pulling mechanism for a rattan-like plastic chair mold. Figure 1-4 As shown, it includes a base 10, on which is provided a seat core 11, on which is provided a seat molding surface 12, and on which are provided two chair handle cores 13. On the chair handle core 13, there is provided a chair handle molding surface 14. The two chair handle cores 13 are respectively located on both sides of the seat core 11 and are against the seat core 11, the seat molding surface 12 is connected to the chair handle molding surface 14, the chair handle core 13 and the seat core 11 are slidably connected to the base 10, and the base 10 is also provided with an ejection mechanism 15.

[0027] In this embodiment, the injection molding liquid forms the seat portion on the seat molding surface 12, and the chair handles on both sides of the seat are formed on the handle molding surface 14. Since the mold is used to make plastic chairs that imitate rattan, the mold surface has many structures that imitate rattan. Therefore, during the demolding process, the traditional ejection method is not applicable to this mold. In this mold, the chair handle cores 13 on both sides are first moved away from the seat core 11 in the horizontal direction, so that the chair handle core 13 is first disconnected from the plastic part, and then the plastic part is ejected and disconnected from the seat core 11 through the ejection mechanism 15.

[0028] The chair handle molding surface 14 includes a plurality of imitation rattan grooves 16 , the placement direction of the imitation rattan grooves 16 is consistent with the movement direction of the chair handle core 13 , and the chair handle core 13 approaches or moves away from the seat core 11 along the direction of the imitation rattan grooves 16 .

[0029] In this embodiment, the rattan chair is made of woven rattan, and the shapes of the rattan are all distributed in a straight line, either horizontally or vertically. In this mold, the imitation rattan on the chair handle is placed horizontally. Therefore, during the demolding process, the chair handle core 13 needs to be moved along the placement direction of the imitation rattan groove 16, that is, away from the horizontal direction of the base 10 and the seat core 11, so that it can be successfully separated from the plastic part without bending the plastic part.

[0030] The ejection mechanism 15 includes two inclined ejector rods 17 , each corresponding to a chair handle core 13 . The two inclined ejector rods 17 are located on both sides of the seat core 11 , and the inclined ejector rods 17 extend between the chair handle molding surface 14 and the seat molding surface 12 .

[0031] In this embodiment, after the chair handle core 13 is disconnected from the plastic part, the inclined ejector rod 17 on the ejection mechanism 15 is driven by the external drive of the mold to push the plastic part up, thereby separating the plastic part from the chair seat core 11. This mold has two inclined ejector rods 17, which are respectively pushed at the two ends of the plastic part, thereby stably ejecting the plastic part.

[0032] The ejection mechanism 15 further includes a linear drive 18 disposed on the base 10 . The output shaft of the linear drive 18 is tilted and connected to the seat core 11 .

[0033] In this embodiment, while the inclined ejector rod 17 moves, the linear drive 18 works to move the seat core 11, so that the seat core 11 moves away from the base 10. Since the plastic part is large, the distance of the seat core 11 provides space for it to fall after demolding.

[0034] The tilt angle of the inclined ejector rod 17 is smaller than the curve angle of the output shaft of the linear drive 18 . During the demoulding process, the inclined ejector rod 17 gradually moves away from the seat core 11 .

[0035] In this embodiment, since most of the area of ​​the plastic part adheres to the seat core 11, the inclination angle of the inclined ejector 17 is smaller than the curve angle of the output shaft of the linear drive 18, which causes the plastic part and the seat core 11 to be misaligned during the ejection process, and eventually causes the plastic part to be disconnected from the seat core 11, and the demolding is completed under the ejection of the inclined ejector 17.

[0036] The base 10 is further provided with a plurality of guide shafts 19 slidably connected to the seat core 11 .

[0037] In this embodiment, the seat core 11 slides along the guide shaft 19, so that the seat core 11 moves stably, thereby preventing the plastic part from bending during the demoulding process.

[0038] Two stool foot forming rods 20 are also provided on the side of the chair seat core 11 away from the inclined push rod 17, and a stool foot forming cavity 21 is formed between the stool foot forming rods 20 and the corresponding chair handle core 13. The stool foot forming rods 20 are connected to the transverse movement mechanism 22 provided on the base 10.

[0039] In this embodiment, the outer surfaces of the two inclined ejectors 17 are used to form two stool legs, and the two stool leg forming rods 20 are used to form the other two stool legs. Since the stool leg forming rods 20 are located on the moving trajectory of the seat core 11 for demolding, before the seat core 11 and the inclined ejectors 17 move, the stool leg forming rods 20 are disconnected from the plastic part in the horizontal direction through the transverse movement mechanism 22.

[0040] The transverse movement mechanism 22 includes a transverse movement block 23, the stool leg forming rod 20 is fixed on the transverse movement block 23, the transverse movement block 23 is slidably connected to the base 10, and the transverse movement block 23 can move away from or close to the seat core 11 along the horizontal direction of the seat core 11.

[0041] In this embodiment, the transverse moving block 23 is connected to an external driver, and under the action of the external driver, the transverse moving block 23 moves the stool foot forming rod 20 away from the plastic part in the horizontal direction.

[0042] The chair handle core 13 is provided with an injection molding groove 24 , which extends from the top of the chair handle core 13 to the bottom thereof near the side of the stool leg molding rod 20 , and is connected to a plurality of injection molding ports 25 .

[0043] In this embodiment, since the plastic part is relatively large, a plurality of injection ports 25 are provided to facilitate rapid injection molding and prevent delamination or expansion and bending caused by different cooling speeds.

[0044] The chair handle core 13 is slidably disposed on a guide rod 26 , and the guide rod 26 is fixed on the base 10 .

[0045] In this embodiment, the chair handle core 13 moves along the guide rod 26 during its movement, so that the movement of the chair handle core 13 is more stable.

[0046] The working principle of the present invention is as follows: the injection liquid quickly completes the injection molding process through the injection groove 24 and multiple injection ports 25. After cooling, the chair handle core 13 is moved away from the plastic part along the guide rod 26 under the action of the external driver, and the transverse block 23 carries the stool foot molding rod 20 away from the plastic part in the horizontal direction under the action of the external driver. Then the linear driver 18 works to make the seat core 11 move obliquely along the guide shaft 19, and the inclined ejector rod 17 moves at the same time under the action of the external driver. Since most of the area of ​​the plastic part adheres to the seat core 11, the inclination angle of the inclined ejector rod 17 is smaller than the curve angle of the output shaft of the linear driver 18, which will cause the plastic part and the seat core 11 to be misaligned during the ejection process, and finally the plastic part is disconnected from the seat core 11, and the demolding is completed under the ejection of the inclined ejector rod 17.

[0047] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Persons skilled in the art may make various modifications, additions, or substitutions to the described specific embodiments without departing from the spirit of the present invention or exceeding the scope defined by the appended claims.

[0048] Although this article uses the base 10, seat core 11, seat molding surface 12, handle core 13, handle molding surface 14, ejection mechanism 15, imitation rattan groove 16, inclined ejector 17, linear drive 18, guide shaft 19, stool leg molding rod 20, stool leg molding cavity 21, transverse mechanism 22, transverse block 23, injection groove 24, injection port 25, guide rod 26, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention.

Claims

1. A multi-angle long core-pulling mechanism for a rattan-like plastic chair mold, characterized in that: The invention comprises a base (10), wherein the base (10) is provided with a seat core (11), the seat core (11) is provided with a seat forming surface (12), the base (10) is further provided with two chair handle cores (13), the chair handle core (13) is provided with a chair handle forming surface (14), the two chair handle cores (13) are respectively located on both sides of the seat core (11) and are against the seat core (11), the seat forming surface (12) is connected to the chair handle forming surface (14), the chair handle core (13) and the seat core (11) are slidably connected to the base (10), and the base (10) is further provided with an ejection mechanism (15).

2. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 1 is characterized in that: The chair handle molding surface (14) includes a plurality of imitation rattan grooves (16), the placement direction of the imitation rattan grooves (16) is consistent with the moving direction of the chair handle core (13), and the chair handle core (13) approaches or moves away from the chair seat core (11) along the direction of the imitation rattan grooves (16).

3. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 1 is characterized in that: The ejection mechanism (15) includes two inclined ejector rods (17), each of which corresponds to a chair handle core (13). The two inclined ejector rods (17) are located on both sides of the chair seat core (11), and the inclined ejector rods (17) extend between the chair handle molding surface (14) and the chair seat molding surface (12).

4. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 3 is characterized in that: The ejection mechanism (15) further comprises a linear drive (18) arranged on the base (10), the output shaft of the linear drive (18) being arranged at an angle, and the output shaft of the linear drive (18) being connected to the seat core (11).

5. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 4 is characterized in that: The tilt angle of the inclined ejector rod (17) is smaller than the curve angle of the output shaft of the linear drive (18). During the demoulding process, the inclined ejector rod (17) gradually moves away from the seat core (11).

6. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 4 is characterized in that: The base (10) is also provided with a plurality of guide shafts (19) which are slidably connected to the seat core (11).

7. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 3 is characterized in that: Two stool foot forming rods (20) are further provided on the side of the chair seat core (11) away from the inclined push rod (17), and a stool foot forming cavity (21) is formed between the stool foot forming rods (20) and the corresponding chair handle cores (13). The stool foot forming rods (20) are connected to a transverse movement mechanism (22) provided on the base (10).

8. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 7, characterized in that: The transverse movement mechanism (22) includes a transverse movement block (23), the stool leg forming rod (20) is fixed on the transverse movement block (23), the transverse movement block (23) is slidably connected to the base (10), and the transverse movement block (23) can move away from or approach the seat core (11) along the horizontal direction of the seat core (11).

9. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 1, characterized in that: The chair handle core (13) is provided with an injection molding groove (24), which extends from the top of the chair handle core (13) to the bottom of the chair handle core (13) near the stool foot molding rod (20), and the injection molding groove (24) is connected to a plurality of injection molding ports (25).

10. The multi-angle long core-pulling mechanism of the imitation rattan plastic chair mold according to claim 1, characterized in that: The chair handle core (13) is slidably arranged on a guide rod (26), and the guide rod (26) is fixed on the base (10).

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