Large size assembled plastic table injection mold

Abstract

The utility model provides a large-size assembled plastic table injection mold, which belongs to the field of mold technology. It includes a lower mold plate, on which a lower molding surface with a rectangular cross section is arranged, and the four side parts of the lower molding surface have outer edge molding surfaces of the bottom of the table, and the lower mold plate is provided with four outer edge molding inserts which are respectively connected to the four outer edge molding surfaces of the bottom of the table and can move in the horizontal direction. After the outer edge molding inserts are translated outward and separated from the outer edge molding surfaces of the bottom of the table, when the top plate moves upward to eject the product, a vertical upward thrust can still be applied to the outer edge position of the product through the outer edge ejection block to prevent the outer edge of the product from being deformed or broken due to uneven force.

Description

Technical Field

[0001] The utility model belongs to the technical field of molds and relates to a large-size assembled plastic table injection mold. Background Art

[0002] When injection molding the table top of a large-sized assembled plastic table, it is necessary to set external panels on the four sides of the lower mold plate to assist in molding the outer edge of the bottom of the table top. After the product is formed, the external panels move horizontally outward to separate from the table top and eject the table top product through the ejection mechanism. During the ejection process, the outer edge of the table top is not directly subjected to the thrust of the ejection mechanism, so it is very likely that the outer edge will be deformed or even broken due to uneven force during ejection.

[0003] For example, a Chinese patent discloses an injection mold for a plastic desktop of a folding table [application number: 201822000001.2], which includes an upper desktop mold and a lower desktop mold. A filling cavity is formed between the upper desktop mold and the lower desktop mold. The upper desktop mold or the lower desktop mold has only one injection port. Utility Model Content

[0004] The utility model aims to solve the above problems and provides a large-size assembled plastic table injection mold.

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

[0006] A large-size assembled plastic table injection mold, including a lower template, the lower template is provided with a lower molding surface with a rectangular cross-section, the four side portions of the lower molding surface have outer edge molding surfaces of the table bottom, and the lower template is provided with four outer edge molding inserts which are respectively connected to the four outer edge molding surfaces of the table bottom and can move in the horizontal direction, the inner ends of the two outer edge molding inserts located on the left and right sides of the lower template have a plurality of outer edge ejection blocks extending to the bottom of the outer edge molding surfaces of the table bottom, and the outer edge molding inserts are connected to the top plate on the lower side of the lower template through a sliding connection structure, and the rear side of the lower template is also provided with two horizontal inserts horizontally inserted into the lower template and a translation component which can drive the horizontal inserts to reciprocate in the horizontal direction.

[0007] In the above-mentioned large-size assembled plastic table injection mold, the sliding connection structure includes a horizontal slide groove arranged on the outer edge molding insert, a push rod joint is slidably fitted in the horizontal slide groove, and an annular limit block is protruding from the push rod joint and can be inserted into the limit slide grooves on both sides of the horizontal slide groove, and an outer edge push rod connected to the push rod joint is fixedly connected to the top plate.

[0008] In the above-mentioned large-size assembled plastic table injection mold, the translation assembly includes a driver mounting seat fixed on the lower mold plate, and the driver mounting seat is provided with a translation driver connected to the horizontal insert.

[0009] In the above-mentioned large-size assembled plastic table injection mold, it also includes a driving rod arranged on the upper mold plate, the driving rod is arranged obliquely and the bottom end is inserted into the driving rod sliding groove on the outer edge molding insert.

[0010] In the above-mentioned large-size assembled plastic table injection mold, the top plate is also provided with an internal and external synchronous ejection mechanism.

[0011] In the above-mentioned large-size assembled plastic table injection mold, the internal and external synchronous ejection mechanism includes an internal ejection component and an external ejection component.

[0012] In the above-mentioned large-size assembled plastic table injection mold, the external ejection component includes two long external ejector blocks respectively arranged on the inner side of the outer edge molding inserts located on the front and rear sides of the lower template, and a number of No. 1 external inclined ejector rods connected to the long external ejector blocks are hinged on the top plate, and the inclination direction of the No. 1 external inclined ejector rods is toward the inner side of the lower template.

[0013] In the above-mentioned large-size assembled plastic table injection mold, the external ejector assembly also includes a plurality of external inclined ejector blocks arranged along the circumferential direction, and the external inclined ejector blocks are connected to the ejector plate through a No. 2 external inclined ejector rod.

[0014] In the above-mentioned large-size assembled plastic table injection mold, the inner ejector assembly includes four long strip inner ejector blocks that are enclosed in a U-shaped shape, and the long strip inner ejector blocks are connected to the ejector plate through a plurality of inner inclined ejector rods.

[0015] In the above-mentioned injection mold for the large-size assembled plastic table, the lower molding surface is also recessed inwardly to provide a plurality of mutually interwoven transverse rib molding grooves and longitudinal rib molding grooves.

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

[0017] 1. After the outer edge molding insert is translated outward and separated from the outer edge molding surface of the table bottom, when the top plate moves upward to eject the product, it can still apply a vertical upward thrust to the outer edge of the product through the outer edge ejection block to prevent the outer edge of the product from being deformed or broken due to uneven force.

[0018] 2. The annular limit block and the horizontal slide groove on the ejector rod joint cooperate to enable the outer edge forming insert connected to the outer edge ejector rod to move horizontally.

[0019] 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

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

[0021] Figure 2 It is a schematic diagram of the structure of the outer edge forming insert;

[0022] Figure 3 It is a schematic diagram of the local structure of the lower template;

[0023] Figure 4 It is a cross-sectional view of the lower template;

[0024] Figure 5 It is a structural diagram of the internal and external synchronous ejection mechanism.

[0025] In the figure, the lower template 1, the lower forming surface 2, the outer edge forming surface of the table bottom 3, the outer edge forming insert 4, the outer edge ejection block 5, the sliding connection structure 6, the top plate 7, the horizontal insert 8, the horizontal slide 9, the ejector rod joint 10, the annular limit block 11, the outer edge ejector rod 12, the driver mounting seat 13, the drive rod slide 14, the inner ejection assembly 15, the outer ejection assembly 16, the elongated outer ejector block 17, the number one outer inclined ejector rod 18, the outer inclined ejector block 19, the number two outer inclined ejector rod 20, the elongated inner ejector block 21, the inner inclined ejector rod 22, the transverse rib forming groove 23, and the longitudinal rib forming groove 24. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 5 As shown, a large-sized assembled plastic table injection mold includes a lower template 1, on which is provided a lower molding surface 2 with a rectangular cross-section, the four side portions of the lower molding surface 2 have table bottom outer edge molding surfaces 3, and the lower template 1 is provided with four outer edge molding inserts 4 which are respectively connected to the four table bottom outer edge molding surfaces 3 and can move in the horizontal direction, the inner ends of the two outer edge molding inserts 4 located on the left and right sides of the lower template 1 have a plurality of outer edge ejection blocks 5 extending to the bottom of the table bottom outer edge molding surfaces 3, and the outer edge molding inserts 4 are connected to the top plate 7 on the lower side of the lower template 1 through a sliding connection structure 6, and the rear side of the lower template 1 is also provided with two horizontal inserts 8 horizontally inserted into the lower template 1 and a translation component which can drive the horizontal inserts 8 to reciprocate in the horizontal direction.

[0027] In the utility model, after the outer edge molding insert 4 is translated outward and separated from the outer edge molding surface 3 of the table bottom, when the top plate moves upward to eject the product, the outer edge ejection block 5 can still apply a vertical upward thrust to the outer edge of the product to prevent the outer edge of the product from being deformed or broken due to uneven force.

[0028] After the product is injection molded, the translation assembly can drive the horizontal insert 8 to move horizontally outward so that the horizontal insert and the product can be separated.

[0029] Specifically, the sliding connection structure 6 includes a horizontal slide groove 9 provided on the outer edge forming insert 4, a push rod joint 10 is slidably fitted in the horizontal slide groove 9, an annular stopper 11 is protruding from the push rod joint 10 and can be inserted into the stopper slide grooves on both sides of the horizontal slide groove 9, and an outer edge push rod 12 connected to the push rod joint 10 is fixedly connected to the top plate 7. The annular stopper on the push rod joint cooperates with the horizontal slide groove so that the outer edge forming insert 4 connected to the outer edge push rod 12 can move horizontally.

[0030] Specifically, the translation assembly includes a driver mounting seat 13 fixed on the lower mold plate 1, and a translation driver connected to the horizontal insert 8 is arranged on the driver mounting seat 13. The translation driver (not shown in the figure) can drive the horizontal insert to reciprocate in the horizontal direction so as to separate the horizontal insert from the lower molding surface.

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

[0032] Specifically, it also includes a driving rod arranged on the upper template, the driving rod is arranged obliquely and the bottom end is inserted into the driving rod slide groove 14 on the outer edge forming insert 4. The upper template moves upward to drive the inclined driving rod to move upward, and when the driving rod moves upward, it cooperates with the driving rod slide groove to drive the outer edge forming insert to move horizontally away from the outer edge forming surface of the table bottom.

[0033] Specifically, an inner and outer synchronous ejection mechanism is also provided on the top plate 7, and the inner and outer synchronous ejection mechanism includes an inner ejection assembly 15 and an outer ejection assembly 16. Through the inner ejection assembly 15 and the outer ejection assembly 16, thrust can be applied to the central part and the peripheral part of the product at the same time so that each position of the product is evenly stressed.

[0034] Specifically, the external ejector assembly includes two long strip external ejector blocks 17 respectively arranged on the inner side of the outer edge forming inserts 4 located on the front and rear sides of the lower template 1, and the top plate 7 is hinged with a number of No. 1 external inclined ejector rods 18 connected to the long strip external ejector blocks 17, and the inclined direction of the No. 1 external inclined ejector rods 18 is toward the inner side of the lower template 1. The external ejector assembly also includes a number of external inclined ejector blocks 19 arranged along the circumferential direction, and the external inclined ejector blocks 19 are connected to the top plate 7 through the No. 2 external inclined ejector rods 20. When the top plate moves upward, the No. 1 external inclined ejector rod 18 can drive the long strip external ejector block 17 to move obliquely upward, so as to apply an oblique upward thrust to the outer edges of the front and rear sides of the product. When the top plate moves upward, the No. 2 external inclined ejector rods 20 can also drive the external inclined ejector block 19 to apply an oblique upward thrust to the peripheral part of the product.

[0035] Specifically, the inner ejector assembly 15 includes four inner strip ejector blocks 21 that are enclosed in a square shape, and the inner strip ejector blocks 21 are connected to the top plate 7 through a plurality of inner inclined ejector rods 22. When the top plate moves upward, the inner inclined ejector rods 22 can drive the inner strip ejector blocks 21 to move obliquely upward, thereby applying a thrust to the center of the product.

[0036] Specifically, the lower molding surface 2 is also recessed inwardly to form a plurality of interwoven transverse rib molding grooves 23 and longitudinal rib molding grooves 24. The transverse rib molding grooves 23 and longitudinal rib molding grooves 24 can form transverse ribs and longitudinal ribs at the bottom of the product during product injection molding, thereby increasing the overall strength of the product.

[0037] The working principle of the utility model is as follows: after the outer edge molding insert 4 is translated outward and separated from the outer edge molding surface 3 of the table bottom, when the top plate moves upward to eject the product, the outer edge ejection block 5 can still apply a vertical upward thrust to the outer edge position of the product to prevent the outer edge of the product from being deformed or broken due to uneven force. After the product is injection molded, the translation assembly can drive the horizontal insert 8 to move horizontally outward so that the horizontal insert and the product can be separated;

[0038] The annular limit block and the horizontal slide groove on the top rod joint cooperate to enable the outer edge forming insert 4 connected to the outer edge top rod 12 to move horizontally, and the translation driver can drive the horizontal insert to move back and forth in the horizontal direction so as to separate the horizontal insert from the lower forming surface. The upper template moves upward to drive the inclined driving rod to move upward, and when the driving rod moves upward, it cooperates with the driving rod slide groove to drive the outer edge forming insert to move horizontally away from the outer edge forming surface of the table bottom;

[0039] Through the inner ejection assembly 15 and the outer ejection assembly 16, thrust can be applied to the central part and the peripheral part of the product at the same time to make the force uniform at each position of the product. When the top plate moves upward, the No. 1 outer inclined ejector rod 18 can drive the long outer ejector block 17 to move obliquely upward, so that an oblique upward thrust can be applied to the front and rear outer edges of the product. When the top plate moves upward, the No. 2 outer inclined ejector rod 20 can drive the outer inclined ejector block 19 to apply an oblique upward thrust to the peripheral part of the product. When the top plate moves upward, the inner inclined ejector rod 22 can drive the long inner ejector block 21 to move obliquely upward, so that a thrust can be applied to the central part of the product. The transverse rib forming groove 23 and the longitudinal rib forming groove 24 can form transverse ribs and longitudinal ribs at the bottom of the product during product injection molding, thereby increasing the overall strength of the product.

[0040] 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.

[0041] Although this article uses the lower template 1, lower molding surface 2, outer edge molding surface 3 of the bottom of the table, outer edge molding insert 4, outer edge ejector block 5, sliding connection structure 6, top plate 7, horizontal insert 8, horizontal slide 9, ejector rod joint 10, annular limit block 11, outer edge ejector 12, driver mounting seat 13, drive rod slide 14, inner ejector assembly 15, outer ejector assembly 16, elongated outer ejector block 17, No. 1 outer inclined ejector rod 18, outer inclined ejector block 19, No. 2 outer inclined ejector rod 20, elongated inner ejector block 21, inner inclined ejector rod 22, transverse rib molding groove 23, longitudinal rib molding groove 24, 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 large-size assembled plastic table injection mold, comprising a lower mold plate (1), characterized in that: The lower molded surface (2) having a rectangular cross section is provided on the lower molded surface (1), the four side portions of the lower molded surface (2) have outer edge molded surfaces (3) at the bottom of the table, and the lower molded surface (1) is provided with four outer edge molded inserts (4) which are respectively connected to the four outer edge molded surfaces (3) at the bottom of the table and can move in the horizontal direction, the inner ends of the two outer edge molded inserts (4) located on the left and right sides of the lower molded surface (1) have a plurality of outer edge ejection blocks (5) extending to the bottom of the outer edge molded surfaces (3) at the bottom of the table, and the outer edge molded inserts (4) are connected to the top plate (7) at the lower side of the lower molded surface (1) via a sliding connection structure (6), and the rear side of the lower molded surface (1) is also provided with two horizontal inserts (8) which are horizontally inserted into the lower molded surface (1) and a translation component which can drive the horizontal inserts (8) to reciprocate in the horizontal direction.

2. The large-size assembled plastic table injection mold according to claim 1 is characterized in that: The sliding connection structure (6) comprises a horizontal slide groove (9) arranged on the outer edge forming insert (4), a push rod joint (10) is slidably matched in the horizontal slide groove (9), and an annular limit block (11) is protruding from the push rod joint (10) and can be inserted into the limit slide grooves on both sides of the horizontal slide groove (9), and an outer edge push rod (12) connected to the push rod joint (10) is fixedly connected to the top plate (7).

3. The large-size assembled plastic table injection mold according to claim 2 is characterized in that: The translation assembly comprises a driver mounting seat (13) fixed on the lower template (1), and a translation driver connected to the horizontal insert (8) is arranged on the driver mounting seat (13).

4. The large-size assembled plastic table injection mold according to claim 2 is characterized in that: It also includes a driving rod arranged on the upper template, wherein the driving rod is arranged obliquely and the bottom end is inserted into a driving rod sliding groove (14) on the outer edge forming insert (4).

5. The large-size assembled plastic table injection mold according to claim 1 is characterized in that: The top plate (7) is also provided with an internal and external synchronous ejection mechanism.

6. The large-size assembled plastic table injection mold according to claim 5, characterized in that: The internal and external synchronous ejection mechanism comprises an internal ejection component (15) and an external ejection component (16).

7. The large-size assembled plastic table injection mold according to claim 6, characterized in that: The external ejector assembly comprises two elongated external ejector blocks (17) respectively arranged on the inner sides of the outer edge forming inserts (4) located on the front and rear sides of the lower template (1); a plurality of No. 1 external inclined ejector rods (18) connected to the elongated external ejector blocks (17) are hingedly connected to the ejector plate (7); the inclination direction of the No. 1 external inclined ejector rods (18) is toward the inner side of the lower template (1).

8. The large-size assembled plastic table injection mold according to claim 7, characterized in that: The external ejection assembly further comprises a plurality of external inclined ejector blocks (19) arranged along the circumferential direction, and the external inclined ejector blocks (19) are connected to the ejector plate (7) via a second external inclined ejector rod (20).

9. The large-size assembled plastic table injection mold according to claim 8, characterized in that: The inner ejection assembly (15) comprises four inner elongated ejection blocks (21) which are enclosed in a square shape. The inner elongated ejection blocks (21) are connected to the ejection plate (7) via a plurality of inner inclined ejection rods (22).

10. The large-size assembled plastic table injection mold according to claim 1, characterized in that: The lower forming surface (2) is also provided with a plurality of mutually interwoven transverse rib forming grooves (23) and longitudinal rib forming grooves (24) which are recessed inwards.

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