Plastic chair mold with inner core-pulling mechanism

Abstract

The utility model provides a plastic chair mold with an inner core-pulling mechanism, and belongs to the technical field of molds. The mold comprises an upper mold plate, a lower mold plate and a middle mold plate which is obliquely inserted between the upper mold plate and the lower mold plate, wherein a plastic chair molding cavity consisting of four chair leg molding parts, a chair seat frame molding part and two armrest molding parts is formed among the upper mold plate, the lower mold plate and the middle mold plate. The chair back mounting groove forming mechanism can form a chair back mounting groove in the armrest forming part, the chair seat mounting hole forming mechanism can form a chair seat mounting hole in the front side of the chair seat frame forming part, and a chair back, a chair seat and a plastic chair main body can be assembled without later processing; the upper mold plate and the lower mold plate are both separated from the middle mold plate, and then pushing force is applied to the chair seat frame through the ejection mechanism, so that the plastic chair body can be ejected out.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a plastic chair mold with an inner core-pulling mechanism. Background Art

[0002] Plastic chair molds are generally formed by mold injection molding. Plastic chairs in the prior art generally adopt integral injection molding or split injection molding. Split-molded plastic chairs generally use molds to directly mold the chair legs, armrests and seat frames of the plastic chair, and then install the cushioned seat and backrest through later assembly. The seat and backrest are mostly molded in one piece, but before assembly, it is necessary to form a backrest mounting groove on the backrest mounting rod of the armrest, and process the seat mounting hole on the front side of the seat frame.

[0003] For example, a Chinese patent discloses an interchangeable multi-purpose injection mold for processing plastic chairs [application number: 201310162873.8], which includes a fixed mold plate and a movable mold plate, a fixed mold is arranged under the fixed mold plate, a movable mold and a guide column are arranged on the movable mold plate, fixed blocks are arranged on both sides of the movable mold, a cavity is arranged on the movable mold, and an injection-molded plastic chair is arranged between the cavity and the fixed mold, a lifting cylinder is arranged on both sides of the cavity, and the piston rod of the lifting cylinder is connected to the fixed block, an ejector plate is arranged in front of the cavity, an ejector rod is arranged on one side of the ejector plate, and an ejector bracket is arranged on the other side of the ejector plate, an ejector cylinder is arranged on the ejector bracket, the piston rod of the ejector cylinder is connected to the cavity, the ejector rod is driven by the ejector cylinder, and the head of the ejector rod contacts the injection-molded plastic chair, which is characterized in that the movable mold is provided with a chair back insert at the chair back position, and blocking blocks are arranged at the chair armrest positions on both sides of the movable mold, the blocking blocks are driven by the piston rod of the blocking block cylinder, and the blocking blocks cooperate with the glue inlet at the movable mold armrest. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a plastic chair mould with an inner core-pulling mechanism.

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

[0006] A plastic chair mold with an internal core-pulling mechanism comprises an upper template, a lower template and an intermediate template obliquely inserted between the upper template and the lower template, a plastic chair molding cavity consisting of four chair leg molding parts, a seat frame molding part and two armrest molding parts is formed between the upper template, the lower template and the intermediate template, an ejection mechanism parallel to the chair leg molding part and connected to the seat frame molding part at the inner end is arranged in the intermediate template, two chair back mounting groove molding mechanisms respectively connected to the two armrest molding parts are arranged at the bottom of the upper template away from the intermediate template, and a seat mounting hole molding mechanism connected to the seat frame molding part is also arranged on the lower template.

[0007] In the above-mentioned plastic chair mold with an internal core pulling mechanism, the chair back mounting groove molding mechanism includes a chair back mounting groove molding slider connected to the chair back mounting rod molding part on the rear side of the armrest molding part, the chair back mounting groove molding slider is horizontally arranged and the outer side of the chair back mounting groove molding slider has a mounting groove molding part inserted into the inner side of the chair back mounting rod molding part.

[0008] In the above-mentioned plastic chair mold with an internal core-pulling mechanism, the chair back mounting groove molding mechanism also includes a No. 1 driver mounting seat fixed on the upper template, and a No. 1 translation driver is fixedly connected to the No. 1 driver mounting seat, and the output shaft end of the No. 1 translation driver is connected to the chair back mounting groove molding slider.

[0009] In the above-mentioned plastic chair mold with an inner core-pulling mechanism, the cross section of the mounting groove forming portion is T-shaped.

[0010] In the above-mentioned plastic chair mold with an internal core-pulling mechanism, the seat mounting hole forming mechanism includes a plurality of horizontally arranged seat mounting hole forming rods, the outer ends of the plurality of seat mounting hole forming rods are fixed on the same driving seat, and the inner ends of the seat mounting hole forming rods are connected to the seat frame forming part.

[0011] In the above-mentioned plastic chair mold with an internal core-pulling mechanism, the seat mounting hole forming mechanism also includes a No. 2 translation driver fixed on the lower template and vertically arranged with the seat mounting hole forming rod, and the No. 2 translation driver is connected to the drive seat via a vertical guide drive structure.

[0012] In the above-mentioned plastic chair mold with an internal core-pulling mechanism, the vertical guide drive structure includes a guide seat fixedly connected to the end of the output shaft of the No. 2 translation driver, and a guide slide groove with a T-shaped cross section is recessed inwardly on the guide seat. A guide slider with a T-shaped cross section and an inclined arrangement is fixedly connected to the outer end of the drive seat, and the guide slider is inserted into the guide slide groove and slidably cooperates with the guide slide groove.

[0013] In the above-mentioned plastic chair mold with an inner core-pulling mechanism, a fixing sleeve is fixedly connected to the lower mold plate, a limiting slide groove with a T-shaped cross section is provided on the fixing sleeve, and the guide seat has a T-shaped cross section and is inserted into the limiting slide groove.

[0014] In the above-mentioned plastic chair mold with an internal core-pulling mechanism, a lifting mechanism is also provided between the middle template and the upper template. The lifting mechanism includes two lifting drives fixed on the middle template. The output shaft end of the lifting drive is fixedly connected to the upper template through a connecting slider.

[0015] In the above-mentioned plastic chair mold with an internal core-pulling mechanism, the ejection mechanism includes an ejection cavity arranged in the middle template, a top plate is arranged in the ejection cavity, an ejection driver parallel to the chair leg forming part is fixedly connected to the outer end of the middle template, and a plurality of ejection rods parallel to the chair leg forming part are fixedly connected to the top plate.

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

[0017] 1. The plastic chair molding cavity consisting of four chair leg molding parts, one seat frame molding part and two armrest molding parts can be injection molded to form a plastic chair body without a backrest and a seat. The backrest mounting groove molding mechanism can mold a backrest mounting groove at the armrest molding part, and the seat mounting hole molding mechanism can mold a seat mounting hole at the front side of the seat frame molding part. The backrest and the seat can be assembled with the plastic chair body without subsequent processing. When the plastic chair body is demoulded, the upper template and the lower template are separated from the middle template, and then the ejection mechanism applies a thrust to the seat frame to eject the plastic chair body.

[0018] 2. The mounting groove forming part on the seat back mounting groove molding slider is inserted into the seat back mounting rod molding part connected to the armrest molding part, so that the seat back mounting groove can be formed on the seat back mounting rod during injection molding. After the product is injection molded, the No. 1 translation driver can drive the seat back mounting groove molding slider to slide outward so that the mounting groove molding part and the seat back mounting rod can be separated.

[0019] 3. A plurality of seat mounting hole forming rods are inserted into the front side of the seat frame forming part, so that a penetrating seat mounting hole can be formed on the front side of the seat frame during injection molding. The seat mounting hole is used to pass bolts. After the product is injection molded, the No. 2 translation driver can drive the drive seat and the seat mounting hole forming rod to move away from the seat frame forming part through the vertical guide drive structure to separate the seat mounting hole forming rod from the product. The use of the vertical guide drive structure can reduce the pressure of the cavity pressure in the molding cavity on the No. 2 translation driver to prevent the seat mounting hole forming rod from retreating.

[0020] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the external structure of the utility model;

[0022] Figure 2 It is a structural schematic diagram of the lower template and the middle template;

[0023] Figure 3 It is a structural schematic diagram of the upper template and the middle template;

[0024] Figure 4 It is a structural schematic diagram of the intermediate template;

[0025] Figure 5 It is a schematic diagram of the local structure of the intermediate template;

[0026] Figure 6 It is a partial structural schematic diagram of the utility model.

[0027] In the figure, the upper template 1, the lower template 2, the middle template 3, the chair leg molding part 4, the seat frame molding part 5, the armrest molding part 6, the plastic chair molding cavity 7, the ejection mechanism 8, the seat back mounting groove molding mechanism 9, the seat mounting hole molding mechanism 10, the seat back mounting rod molding part 11, the seat back mounting groove molding slider 12, the mounting groove molding part 13, the No. 1 driver mounting seat 14, the No. 1 translation driver 15, the seat mounting hole molding rod 16, the driving seat 17, the No. 2 translation driver 18, the guide seat 19, the guide slider 20, the fixing sleeve 21, the lifting mechanism 22, the lifting driver 23, the top plate 24, the ejection driver 25, and the ejection rod 26. DETAILED DESCRIPTION

[0028] like Figure 1-Figure 6 As shown, a plastic chair mold with an internal core-pulling mechanism includes an upper template 1, a lower template 2 and an intermediate template 3 obliquely inserted between the upper template 1 and the lower template 2, a plastic chair molding cavity 7 consisting of four chair leg molding parts 4, a seat frame molding part 5 and two armrest molding parts 6 is formed between the upper template 1, the lower template 2 and the intermediate template 3, an ejection mechanism 8 parallel to the chair leg molding part 4 and connected to the seat frame molding part 5 at the inner end is arranged in the intermediate template 3, two chair back mounting groove molding mechanisms 9 respectively connected to the two armrest molding parts 6 are arranged at the bottom of the upper template 1 away from the intermediate template 3, and a seat mounting hole molding mechanism 10 connected to the seat frame molding part 5 is also arranged on the lower template 2.

[0029] In the utility model, the plastic chair molding cavity 7 composed of four chair leg molding parts 4, a seat frame molding part 5 and two armrest molding parts 6 can be injection molded to form a plastic chair body without a backrest and a seat. The backrest mounting groove molding mechanism 9 can mold a backrest mounting groove at the armrest molding part 6, and the seat mounting hole molding mechanism 10 can mold a seat mounting hole on the front side of the seat frame molding part 5. The backrest and the seat can be assembled with the plastic chair body without subsequent processing. When the plastic chair body is demolded, the upper template and the lower template are separated from the middle template, and then the ejection mechanism 8 applies a thrust to the seat frame to eject the plastic chair body.

[0030] Specifically, the backrest mounting groove forming mechanism 9 includes a backrest mounting groove forming slider 12 connected to the backrest mounting rod forming part 11 at the rear side of the armrest forming part 6, the backrest mounting groove forming slider 12 is horizontally arranged and has a mounting groove forming part 13 inserted into the inner side of the backrest mounting rod forming part 11 on the outer side of the backrest mounting groove forming slider 12. The mounting groove forming part 13 on the backrest mounting groove forming slider 12 is inserted into the backrest mounting rod forming part 11 connected to the armrest forming part 6, so that a backrest mounting groove can be formed on the backrest mounting rod during injection molding; the backrest mounting groove forming mechanism 9 also includes a No. 1 driver mounting seat 14 fixed on the upper mold plate 1, and a No. 1 translation driver 15 is fixedly connected to the No. 1 driver mounting seat 14, and the output shaft end of the No. 1 translation driver 15 is connected to the backrest mounting groove forming slider 12. After the product is injection molded, the No. 1 translation driver can drive the backrest mounting groove forming slider 12 to slide outward so that the mounting groove forming part 13 and the backrest mounting rod can be separated.

[0031] Those skilled in the art should understand that the first translation driver may be an oil cylinder, an air cylinder or a linear motor, etc.

[0032] Preferably, the installation groove forming portion 13 has a T-shaped cross section, so that the cross section of the seat back installation groove can be T-shaped, which can increase the stability of the seat back after installation.

[0033] Specifically, the seat mounting hole forming mechanism 10 includes a plurality of seat mounting hole forming rods 16 arranged horizontally, the outer ends of the plurality of seat mounting hole forming rods 16 are fixed on the same driving seat 17, and the inner ends of the seat mounting hole forming rods 16 are connected to the seat frame forming part 5. The plurality of seat mounting hole forming rods 16 are inserted into the front side of the seat frame forming part 5 to form a seat mounting hole that is through-set on the front side of the seat frame during injection molding, and the seat mounting hole is used to penetrate a bolt. The seat mounting hole forming mechanism 10 also includes a second translation driver 18 fixed on the lower template 2 and arranged vertically with the seat mounting hole forming rods 16, and the second translation driver 18 is connected to the driving seat 17 via a vertical guide driving structure. After the product is injection molded, the No. 2 translation driver 18 can drive the driving seat and the seat mounting hole forming rod 16 to move to the side away from the seat frame molding part through the vertical guide driving structure to separate the seat mounting hole forming rod 16 from the product. The use of the vertical guide driving structure can reduce the pressure of the cavity pressure in the molding cavity on the No. 2 translation driver to prevent the seat mounting hole forming rod 16 from retreating.

[0034] Those skilled in the art should understand that the second translation driver may be an oil cylinder, an air cylinder or a linear motor, etc.

[0035] Specifically, the vertical guide drive structure includes a guide seat 19 fixedly connected to the output shaft end of the second translation driver 18, and a guide slide groove with a T-shaped cross section is provided inwardly on the guide seat 19. A guide slider 20 with a T-shaped cross section and inclined is fixedly connected to the outer end of the drive seat 17, and the guide slider 20 is inserted into the guide slide groove and slidably cooperates with the guide slide groove. The second translation driver can drive the guide seat 19 to translate in a direction perpendicular to the seat mounting hole forming rod 16. The translation of the guide seat 19 can drive the guide slider to move away from the seat frame forming part through the guide slide groove, and the movement of the guide slider can drive the drive seat 17 and the seat mounting hole forming rod 16 to move.

[0036] Preferably, a fixing sleeve 21 is fixedly connected to the lower template 2, and a limiting slide groove with a T-shaped cross section is provided on the fixing sleeve 21, and the guide seat 19 has a T-shaped cross section and is inserted into the limiting slide groove. The limiting slide groove with a T-shaped cross section in the fixing sleeve 21 can limit the guide seat 19 with a T-shaped cross section.

[0037] Specifically, a lifting mechanism 22 is provided between the middle template 3 and the upper template 1, and the lifting mechanism 22 includes two lifting drivers 23 fixed on the middle template 3, and the output shaft end of the lifting driver 23 is fixedly connected to the upper template 1 through a connecting slider. When the mold is opened, the middle template and the upper template move upward and separate from the lower template, and then the lifting mechanism drives the upper template to move upward and separate from the middle template, and the two lifting drivers act synchronously to drive the upper template to rise and fall in the vertical direction.

[0038] Those skilled in the art should understand that the lifting drive may be an oil cylinder, an air cylinder or a linear motor, etc.

[0039] Specifically, the ejection mechanism 8 includes an ejection cavity provided in the middle template 3, a top plate 24 is provided in the ejection cavity, an ejection driver 25 parallel to the chair leg forming part 4 is fixedly connected to the outer end of the middle template 3, and a plurality of ejection rods 26 parallel to the chair leg forming part 4 are fixedly connected to the top plate 24. When the product is ejected, the ejection driver 25 can drive the top plate 24 to move in a direction parallel to the chair leg forming part, so as to apply a thrust to the seat frame of the product through the plurality of ejection rods.

[0040] Those skilled in the art should understand that the ejection drive may be an oil cylinder, an air cylinder or a linear motor, etc.

[0041] The working principle of the utility model is as follows: the plastic chair molding cavity 7 composed of four chair leg molding parts 4, a seat frame molding part 5 and two armrest molding parts 6 can be injection molded to form a plastic chair body without a chair back and a seat, the chair back mounting groove molding mechanism 9 can mold a chair back mounting groove at the armrest molding part 6, and the seat mounting hole molding mechanism 10 can mold a seat mounting hole at the front side of the seat frame molding part 5, so that the chair back and the seat can be assembled with the plastic chair body without subsequent processing. When the plastic chair body is demoulded, the upper template and the lower template are separated from the middle template, and then the ejection mechanism 8 applies a thrust to the seat frame so that the plastic chair body can be ejected;

[0042] The mounting groove forming part 13 on the backrest mounting groove forming slider 12 is inserted into the backrest mounting rod forming part 11 connected to the armrest forming part 6, so that a backrest mounting groove can be formed on the backrest mounting rod during injection molding. After the product is injection molded, the No. 1 translation driver can drive the backrest mounting groove forming slider 12 to slide outward so that the mounting groove forming part 13 and the backrest mounting rod can be separated. A plurality of seat mounting hole forming rods 16 are inserted into the front side of the seat frame forming part 5, so that a through-set seat mounting hole can be formed on the front side of the seat frame during injection molding. The seat mounting hole is used to penetrate bolts. After the product is injection molded, the No. 2 translation driver 18 can drive the drive seat and the seat through the vertical guide drive structure. The mounting hole forming rod 16 moves to the side away from the seat frame forming part so that the seat mounting hole forming rod 16 and the product are separated. The vertical guide drive structure can reduce the pressure of the cavity pressure in the forming cavity on the No. 2 translation driver to prevent the seat mounting hole forming rod 16 from retreating. The No. 2 translation driver can drive the guide seat 19 to translate in a direction perpendicular to the seat mounting hole forming rod 16. The translation of the guide seat 19 can drive the guide slider to move away from the seat frame forming part through the guide slide groove. The movement of the guide slider can drive the drive seat 17 and the seat mounting hole forming rod 16 to move. The T-shaped limiting slide groove in the fixing sleeve 21 can limit the T-shaped guide seat 19.

[0043] When the mold is opened, the middle template and the upper template move upward and separate from the lower template, and then the upper template is driven upward and separate from the middle template through the lifting mechanism. The synchronous action of the two lifting drivers can drive the upper template to move up and down in the vertical direction. When the product is ejected, the ejection driver 25 can drive the top plate 24 to move in the direction parallel to the chair leg molding part, so that a thrust can be applied to the seat frame of the product through a number of ejection rods.

[0044] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0045] Although this article uses the upper template 1, lower template 2, middle template 3, chair leg molding part 4, seat frame molding part 5, armrest molding part 6, plastic chair molding cavity 7, ejection mechanism 8, chair back mounting groove molding mechanism 9, seat mounting hole molding mechanism 10, chair back mounting rod molding part 11, chair back mounting groove molding slider 12, mounting groove molding part 13, No. 1 driver mounting seat 14, No. 1 translation driver 15, seat mounting hole molding rod 16, drive seat 17, No. 2 translation driver 18, guide seat 19, guide slider 20, fixing sleeve 21, lifting mechanism 22, lifting driver 23, top plate 24, ejection driver 25, ejection rod 26, etc. more frequently, these terms are used only to more conveniently describe and explain the essence of the utility model; interpreting them as any additional restrictions is contrary to the spirit of the utility model.

Claims

1. A plastic chair mold with an inner core pulling mechanism, comprising an upper mold plate (1), a lower mold plate (2), and an intermediate mold plate (3) obliquely inserted between the upper mold plate (1) and the lower mold plate (2), characterized in that: A plastic chair molding cavity (7) consisting of four chair leg molding parts (4), a seat frame molding part (5) and two armrest molding parts (6) is formed between the upper template (1), the lower template (2) and the middle template (3); an ejection mechanism (8) is arranged in the middle template (3) and is parallel to the chair leg molding part (4) and the inner end of which is connected to the seat frame molding part (5); two chair back mounting groove molding mechanisms (9) are respectively connected to the two armrest molding parts (6) at the bottom of the upper template (1) away from the middle template (3); and a seat mounting hole molding mechanism (10) is also arranged on the lower template (2) and is connected to the seat frame molding part (5).

2. The plastic chair mold with an inner core-pulling mechanism according to claim 1, characterized in that: The seat back mounting groove forming mechanism (9) comprises a seat back mounting groove forming slider (12) connected to a seat back mounting rod forming portion (11) on the rear side of the armrest forming portion (6); the seat back mounting groove forming slider (12) is horizontally arranged and has a mounting groove forming portion (13) on the outer side of the seat back mounting groove forming slider (12) inserted into the inner side of the seat back mounting rod forming portion (11).

3. The plastic chair mold with an inner core-pulling mechanism according to claim 2, characterized in that: The seat back mounting groove forming mechanism (9) further comprises a No. 1 driver mounting seat (14) fixed on the upper template (1), a No. 1 translation driver (15) being fixedly connected to the No. 1 driver mounting seat (14), and an output shaft end of the No. 1 translation driver (15) being connected to the seat back mounting groove forming slider (12).

4. The plastic chair mold with an inner core-pulling mechanism according to claim 3, characterized in that: The installation groove forming portion (13) has a T-shaped cross section.

5. The plastic chair mold with an inner core-pulling mechanism according to claim 1, characterized in that: The seat mounting hole forming mechanism (10) comprises a plurality of seat mounting hole forming rods (16) arranged horizontally, the outer ends of the plurality of seat mounting hole forming rods (16) are fixed on the same driving seat (17), and the inner ends of the seat mounting hole forming rods (16) are connected to the seat frame forming part (5).

6. The plastic chair mold with an inner core-pulling mechanism according to claim 5, characterized in that: The seat mounting hole forming mechanism (10) further comprises a second translation driver (18) fixed on the lower template (2) and arranged vertically with the seat mounting hole forming rod (16); the second translation driver (18) is connected to the driving seat (17) via a vertical guide driving structure.

7. The plastic chair mold with an inner core-pulling mechanism according to claim 6, characterized in that: The vertical guide drive structure includes a guide seat (19) fixedly connected to the end of the output shaft of the second translation driver (18), and a guide slide groove with a T-shaped cross section is provided inwardly on the guide seat (19). The outer end of the drive seat (17) is fixedly connected to a guide slider (20) with a T-shaped cross section and inclined, and the guide slider (20) is inserted into the guide slide groove and slidably cooperates with the guide slide groove.

8. The plastic chair mold with an inner core-pulling mechanism according to claim 7, characterized in that: The lower template (2) is fixedly connected with a fixing sleeve (21), and the fixing sleeve (21) is provided with a limiting sliding groove with a T-shaped cross section. The guide seat (19) has a T-shaped cross section and is inserted into the limiting sliding groove.

9. The plastic chair mold with an inner core-pulling mechanism according to claim 1, characterized in that: A lifting mechanism (22) is also provided between the middle template (3) and the upper template (1), and the lifting mechanism (22) includes two lifting drivers (23) fixed on the middle template (3), and the output shaft end of the lifting driver (23) is fixedly connected to the upper template (1) via a connecting slider.

10. The plastic chair mold with an inner core-pulling mechanism according to claim 1, characterized in that: The ejection mechanism (8) comprises an ejection cavity arranged in the middle template (3), a top plate (24) is arranged in the ejection cavity, an ejection driver (25) parallel to the chair leg forming part (4) is fixedly connected to the outer end of the middle template (3), and a plurality of ejection rods (26) parallel to the chair leg forming part (4) are fixedly connected to the top plate (24).

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