Two-side oppositely-opened outward-sliding ejection demolding mechanism of plastic seat backrest mold

Abstract

The utility model belongs to the technical field of molds, and relates to a two-side oppositely-opened outward-sliding ejection demolding mechanism for a plastic seat backrest mold. The seat backrest forming die comprises a seat backrest forming lower die and a seat backrest forming upper die. In the injection molding process, the backrest mounting hole forming core-pulling piece can synchronously form two mounting long holes of a plastic part, the two side oppositely-opened outer sliding ejection demolding assemblies can synchronously form side holes in the two sides of the plastic part, the hole groove forming demolding piece synchronously forms two rows of hole groove structures in the middle of the plastic part, and mold opening is conducted after injection molding is completed; during demolding, the backrest mounting hole forming core-pulling piece is moved towards one end far away from a product to realize side core-pulling, then inclined ejection demolding is carried out through the two-side opposite-opening outer-sliding ejection demolding assemblies, hole groove structures on the two sides are separated from the two-side opposite-opening outer-sliding ejection demolding assemblies, and then the straight ejection piece and the hole groove forming demolding piece are moved upwards to integrally eject and demold a plastic part. Distributed multi-direction core-pulling demolding ejection is adopted, and hole groove structures at all positions cannot be damaged in the ejection process.

Description

TECHNICAL FIELD

[0001] The utility model belongs to mould technical field relates to a kind of two sides of plastic seat backrest mould opening out sliding ejection demoulding mechanism. BACKGROUND

[0002] Plastic seat backrest is popular in market due to light weight and low cost. Plastic seat backrest is generally injection molded using injection mold, and then assembled with base of other materials. In the existing plastic seat backrest mold, due to the need for assembly, it is difficult to simultaneously form the mounting long hole, side hole and other position hole groove structure of the plastic part during injection molding, which may cause demolding difficulty or even damage the formed hole groove structure. Therefore, there is an urgent need to design a plastic seat backrest mold two-side opening out sliding ejection demoulding mechanism that can overcome the above defects.

[0003] In order to overcome the deficiencies of the prior art, people have continuously explored and proposed various solutions. For example, a seat backrest injection mold [application number: 202221200718.1] is disclosed in Chinese patent, which includes a box body, a placing cavity is formed in the box body, and a fixed mold plate is detachably installed in the placing cavity. An injection pipe is fixedly installed outside the box body and extends into the fixed mold plate. Support plates are symmetrically fixedly installed on the box body, and a motor is fixedly installed on one side of the support plate. However, this scheme still has the defects of difficulty in simultaneously forming the mounting long hole, side hole and other position hole groove structure of the plastic part during injection molding, which may cause demolding difficulty or even damage the formed hole groove structure. UTILITY MODEL CONTENT

[0004] The utility model aims at the above problems, and provides a kind of two sides of plastic seat backrest mould opening out sliding ejection demoulding mechanism.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of two sides of plastic seat backrest mould opening out sliding ejection demoulding mechanism, including seat backrest forming lower mould and seat backrest forming upper mould, the seat backrest forming upper mould top is equipped with injection plate, the seat backrest forming lower mould is equipped with forming concave cavity, the seat backrest forming upper mould is equipped with forming convex, the position of forming concave cavity and forming convex corresponds and shape is matched, the seat backrest forming lower mould is equipped with the backrest mounting hole forming core-pulling element that extends into forming concave cavity and is slidably connected with seat backrest forming lower mould, the seat backrest forming lower mould is also equipped with two sides of opening out sliding ejection demoulding assembly that are staggered with backrest mounting hole forming core-pulling element, the seat backrest forming lower mould lower is equipped with straight top ejector and hole groove forming demoulding element.

[0007] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the two-side split outer slide ejection demolding assembly comprises inclined slide seats arranged on both sides of the seat backrest forming lower mold, and side hole forming shafts are arranged on the inner sides of the inclined slide seats.

[0008] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the inclined slide seats are provided with through-type backrest strip forming grooves, the seat backrest forming lower mold is provided with inclined slide rods, and the inclined slide seats are in sliding cooperation with the inclined slide rods.

[0009] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the backrest mounting hole forming core pulling piece comprises two backrest mounting hole forming rods arranged in the seat backrest forming lower mold, and the backrest mounting hole forming rods are in sliding cooperation with the seat backrest forming lower mold.

[0010] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the head portions of the backrest mounting hole forming rods are provided with positioning shafts, the tail portions of the backrest mounting hole forming rods are provided with horizontal slide seats, and the horizontal slide seats are driven by driving structures.

[0011] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the driving structures comprise linear drives arranged on the seat backrest forming lower mold, the power shafts of the linear drives are connected with connecting plates, and the connecting plates are connected with the horizontal slide seats.

[0012] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the seat backrest forming lower mold is provided with limiting slide rails, and the horizontal slide seats are in sliding cooperation with the limiting slide rails.

[0013] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the straight top ejection pieces comprise a plurality of straight top rods arranged below the seat backrest forming lower mold.

[0014] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the hole and groove forming demolding pieces comprise a plurality of straight top connecting rods arranged below the seat backrest forming lower mold, the top portions of the straight top connecting rods are provided with hole and groove forming shafts, and the diameters of the hole and groove forming shafts are smaller than the diameters of the straight top connecting rods.

[0015] In the two-side split outer slide ejection demolding mechanism of the plastic seat backrest mold, the seat backrest forming lower mold is provided with a top rod fixing plate, and the straight top rods and the straight top connecting rods are connected with the top rod fixing plate respectively.

[0016] Compared with the prior art, the plastic seat backrest mold has the following advantages:

[0017] 1. The utility model discloses a seat back forming lower mould and seat back forming upper mould are approached to each other in the injection moulding process, make the complete cavity form with the molding concave cavity and the molding convex, and the molten material is injected into the cavity through the injection hole in the injection plate, and the backrest mounting hole forming core-pulling part can synchronously form two installation long holes of the plastic part, and the two sides open outer slide ejection demoulding assembly can synchronously form the side hole of both sides of the plastic part, and the hole groove forming demoulding part synchronously forms the two rows of hole groove structures in the middle of the plastic part, without secondary processing, shorten the procedure, reduce the production cost, complete injection moulding, and the backrest mounting hole forming core-pulling part is moved to the end far from the product first, realizes side core-pulling, and then the two sides open outer slide ejection demoulding assembly is used for slanting ejection demoulding, and the hole groove structure of both sides is separated from the two sides open outer slide ejection demoulding assembly, and then the straight ejection part and the hole groove forming demoulding part are moved upwards and the plastic part is ejected and demoulded as a whole, adopts distributed multi -direction core -pulling demoulding ejection, and the hole groove structure at each position is not damaged in the ejection process, and the structure is compact and reasonable.

[0018] 2. The utility model discloses a positioning shaft is clamped with seat back forming lower mould in injection moulding, realizes accurate positioning, when needing to move backrest mounting hole forming rod, starts straight -line driver, and the power shaft of straight -line driver drives the connecting plate and horizontal slide to move synchronously, and the automation degree is higher.

[0019] The other advantages, objects and features of the utility model will be embodied partly through the following description, and will be understood by the person skilled in the art through the research and practice of the utility model. DRAWINGS

[0020] Figure 1 It is the structure schematic diagram of the utility model.

[0021] Figure 2 It is the local structure schematic diagram of the utility model.

[0022] Figure 3 It is the local structure schematic diagram of another direction of the utility model.

[0023] Figure 4 It is the structure schematic diagram of seat back forming upper mould.

[0024] In the drawing: seat back forming lower mould 1, seat back forming upper mould 2, injection plate 3, molding concave cavity 4, molding convex 5, backrest mounting hole forming core-pulling part 6, two sides open outer slide ejection demoulding assembly 7, straight ejection part 8, hole groove forming demoulding part 9, slanting ejection slide 10, side hole forming shaft 11, through -type backrest strip forming groove 12, slanting slide bar 13, backrest mounting hole forming rod 14, positioning shaft 15, horizontal slide 16, drive structure 17, straight -line driver 18, connecting plate 19, limit slide rail 20, straight -top rod 21, straight -top connecting rod 22, hole groove forming shaft 23, top rod fixed plate 24. DETAILED DESCRIPTION

[0025] The utility model is further explained below in combination with the drawings.

[0026] As Figures 1-4 shown, a plastic seat backrest mold two-side split outer slide ejection demolding mechanism, including seat backrest forming lower die 1 and seat backrest forming upper die 2, the seat backrest forming upper die 2 top is equipped with injection plate 3, the seat backrest forming lower die 1 inside is equipped with forming concave cavity 4, the seat backrest forming upper die 2 is equipped with forming convex 5, the position of forming concave cavity 4 and forming convex 5 corresponds and the shape is matched, the seat backrest forming lower die 1 inside is equipped with the backrest mounting hole forming core-pulling piece 6 that extends into to forming concave cavity 4 and with seat backrest forming lower die 1 sliding fit, the seat backrest forming lower die 1 inside is still equipped with two-side split outer slide ejection demolding assembly 7 that is staggered with backrest mounting hole forming core-pulling piece 6 is arranged, the seat backrest forming lower die 1 below is equipped with straight top ejector 8 and hole groove forming demolding piece 9.

[0027] In the embodiment, in the injection molding process, the seat backrest forming lower die 1 and the seat backrest forming upper die 2 are close to each other, so that the forming concave cavity 4 and the forming convex 5 are fitted to form a complete cavity, the molten material is injected into the cavity through the injection hole in the injection plate 3, the backrest mounting hole forming core-pulling piece 6 can simultaneously form two mounting long holes of the plastic part, the two-side split outer slide ejection demolding assembly 7 can simultaneously form two side holes of the plastic part, the hole groove forming demolding piece 9 simultaneously forms two rows of hole groove structures in the middle of the plastic part, without secondary processing, the process is shortened, the production cost is reduced, and the mold is opened after injection molding. First, the backrest mounting hole forming core-pulling piece 6 is moved away from the product end to realize side core pulling, then the two-side split outer slide ejection demolding assembly 7 is used for inclined top demolding to separate the hole groove structure on both sides from the two-side split outer slide ejection demolding assembly 7, and then the straight top ejector 8 and the hole groove forming demolding piece 9 are used for moving upward to eject and demold the plastic part as a whole. Distributed multi-directional core-pulling demolding ejection is adopted, which will not damage the hole groove structure at each position during the ejection process, and the structure is compact and reasonable.

[0028] As Figures 1-4 shown, the two-side split outer slide ejection demolding assembly 7 includes an inclined top slide seat 10 arranged on both sides of the seat backrest forming lower die 1, a side hole forming shaft 11 is arranged on the inner side of the inclined top slide seat 10, a through-type backrest strip forming groove 12 is arranged in the inclined top slide seat 10, an inclined slide rod 13 is arranged in the seat backrest forming lower die 1, and the inclined top slide seat 10 and the inclined slide rod 13 are in sliding fit.

[0029] Specifically, in the injection molding process, the side hole forming shaft 11 is used to synchronously form the two side holes of the plastic part, and the through-type backrest strip forming groove 12 is used to synchronously form the strip-shaped side plate of the plastic part. After the injection molding is completed, the inclined top ejection slide 10 can perform inclined top ejection along the trajectory of the inclined slide rod 13.

[0030] In combination Figure 2 , Figure 3 As shown in the figure, the backrest mounting hole forming core pulling member 6 includes two backrest mounting hole forming rods 14 arranged in the seat backrest forming lower die 1, and the backrest mounting hole forming rods 14 are in sliding fit with the seat backrest forming lower die 1.

[0031] In this embodiment, in the injection molding process, the two backrest mounting hole forming rods 14 can synchronously form the two mounting long holes of the plastic part.

[0032] The head of the backrest mounting hole forming rod 14 is provided with a positioning shaft 15, and the tail of the backrest mounting hole forming rod 14 is provided with a horizontal slide 16, the horizontal slide 16 is driven by a driving structure 17, the driving structure 17 includes a linear actuator 18 arranged on the seat backrest forming lower die 1, and a connecting plate 19 is connected to the power shaft of the linear actuator 18, and the connecting plate 19 is connected with the horizontal slide 16.

[0033] In this embodiment, the positioning shaft 15 is clamped with the seat backrest forming lower die 1 during injection molding, so as to realize precise positioning. When it is needed to move the backrest mounting hole forming rod 14, the linear actuator 18 is started, and the connecting plate 19 and the horizontal slide 16 are synchronously moved by the power shaft of the linear actuator 18, so as to realize high automation. It should be understood by those skilled in the art that the linear actuator 18 can be selected from a pneumatic cylinder, an oil cylinder or a linear motor.

[0034] The seat backrest forming lower die 1 is provided with a limiting slide rail 20, and the horizontal slide 16 is in sliding fit with the limiting slide rail 20.

[0035] In this embodiment, when the horizontal slide 16 slides, the limiting slide rail 20 limits the horizontal slide 16.

[0036] In combination Figures 1-4 As shown in the figure, the straight top ejector 8 includes a plurality of straight top rods 21 arranged below the seat backrest forming lower die 1, the hole and groove forming core pulling member 9 includes a plurality of straight top connecting rods 22 arranged below the seat backrest forming lower die 1, the top of the straight top connecting rod 22 is provided with a hole and groove forming shaft 23, the diameter of the hole and groove forming shaft 23 is smaller than the diameter of the straight top connecting rod 22, the bottom of the seat backrest forming lower die 1 is provided with a top rod fixing plate 24, and the straight top rod 21 and the straight top connecting rod 22 are respectively connected with the top rod fixing plate 24.

[0037] In this embodiment, when injection molding, the hole and groove forming shaft 23 synchronously forms two rows of hole and groove structures in the middle of the plastic part, after injection molding, the ejector rod fixing plate 24 is moved upwards, driving the straight ejector rod 21 and the straight ejector connecting rod 22 to move synchronously, and the molded plastic part is ejected and demolded.

[0038] The working principle of the utility model is:

[0039] In the injection molding process, the seat back forming lower die 1 and the seat back forming upper die 2 are close to each other, so that the forming concave cavity 4 and the forming convex 5 are matched to form a complete cavity, the molten material is injected into the cavity through the injection hole in the injection plate 3, the two backrest mounting hole forming rods 14 can synchronously form two mounting long holes of the plastic part, the side hole forming shaft 11 is used to synchronously form two side holes of the plastic part, the through type backrest strip forming groove 12 is used to synchronously form the strip-shaped side plate of the plastic part, the hole and groove forming shaft 23 synchronously forms two rows of hole and groove structures in the middle of the plastic part, without secondary processing, the process is shortened, the production cost is reduced, the mold is opened after injection molding, the two backrest mounting hole forming rods 14 are moved away from the product end, the side core pulling is realized, the inclined ejector slide 10 can be inclined and demolded along the inclined slide rod 13, the hole and groove structures on both sides are separated from the inclined ejector slide 10, and then the ejector rod fixing plate 24 is moved upwards, driving the straight ejector rod 21 and the straight ejector connecting rod 22 to move synchronously, and the molded plastic part is ejected and demolded, the distributed multi-direction core pulling and demolding ejection are adopted, the hole and groove structures at various positions are not damaged in the ejection process, the structure is compact and reasonable,

[0040] The positioning shaft 15 is clamped with the seat back forming lower die 1 during injection molding, precise positioning is realized, when the backrest mounting hole forming rod 14 needs to be moved, the linear driver 18 is started, the connecting plate 19 and the horizontal slide 16 are synchronously moved through the power shaft of the linear driver 18, and the automation degree is high,

[0041] When the horizontal slide 16 slides, the limiting slide rail 20 limits the horizontal slide 16.

[0042] The specific embodiments described in the present application are only illustrative of the spirit of the utility model. Those skilled in the art to which the utility model belongs can make various modifications or supplements to the described specific embodiments or adopt similar ways to replace, but will not deviate from the spirit of the utility model.

[0043] Although the terms seat back forming lower die 1, seat back forming upper die 2, injection plate 3, forming cavity 4, forming protrusion 5, back mounting hole forming core-pulling part 6, two-side split outer slide ejection demolding assembly 7, straight top ejector 8, hole groove forming demolding part 9, inclined top slide 10, side hole forming shaft 11, through type back bar forming groove 12, inclined slide rod 13, back mounting hole forming rod 14, positioning shaft 15, horizontal slide 16, driving structure 17, linear driver 18, connecting plate 19, limit slide rail 20, straight top rod 21, straight top connecting rod 22, hole groove forming shaft 23, top rod fixing plate 24 and the like are used more in the text, the possibility of using other terms is not excluded. The use of these terms is only for the convenience of describing and explaining the essence of the utility model, and it is against the spirit of the utility model to interpret them as any kind of additional limitation.

Claims

1. A two-sided split outside slide ejection demolding mechanism for a plastic seat back mold, comprising a seat back forming lower mold (1) and a seat back forming upper mold (2), characterized in that, The seat back forming upper die (2) is provided with an injection molding plate (3), the seat back forming lower die (1) is provided with a forming cavity (4), the seat back forming upper die (2) is provided with a forming protrusion (5), the forming cavity (4) and the forming protrusion (5) correspond in position and match in shape, the seat back forming lower die (1) is provided with a backrest mounting hole forming core-pulling element (6) extending into the forming cavity (4) and slidingly matched with the seat back forming lower die (1), the seat back forming lower die (1) is further provided with two side split outer slide ejection demolding assemblies (7) staggered with the backrest mounting hole forming core-pulling element (6), and the seat back forming lower die (1) is provided below with a straight top ejector (8) and a hole groove forming demolding element (9).

2. The two sided split outside slide ejection mechanism for plastic seat back molds of claim 1, wherein, The two side split outer slide ejection demolding assemblies (7) comprise inclined top slide seats (10) arranged on the two sides of the seat back forming lower die (1), and the inclined top slide seats (10) are provided with side hole forming shafts (11) on the inner sides.

3. The two sided split outside slide ejection mechanism for plastic seat back molds of claim 2, wherein, The inclined top slide seats (10) have through-type backrest strip forming grooves (12) therein, the seat back forming lower die (1) is provided with inclined slide rods (13), and the inclined top slide seats (10) are slidingly matched with the inclined slide rods (13).

4. The two sided split outside slide eject demolding mechanism for plastic seat back molds of claim 3, wherein, The backrest mounting hole forming core-pulling element (6) comprises two backrest mounting hole forming rods (14) arranged in the seat back forming lower die (1), and the backrest mounting hole forming rods (14) are slidingly matched with the seat back forming lower die (1).

5. The two sided split outside slide eject ejection mechanism for plastic seat back molds of claim 4 wherein, The backrest mounting hole forming rods (14) are provided at the head portions with positioning shafts (15) and at the tail portions with horizontal slide seats (16), and the horizontal slide seats (16) are driven by driving structures (17).

6. The two sided split outside slide eject ejection mechanism for plastic seat back molds of claim 5, wherein, The driving structures (17) comprise linear drives (18) arranged on the seat back forming lower die (1), and the power shafts of the linear drives (18) are connected with connecting plates (19), and the connecting plates (19) are connected with the horizontal slide seats (16).

7. The two sided split outside slide eject ejection mechanism for plastic seat back molds of claim 6 wherein, The seat back forming lower die (1) is provided above with limiting slide rails (20), and the horizontal slide seats (16) are slidingly matched with the limiting slide rails (20).

8. The two sided split outside slide eject ejection mechanism for plastic seat back molds of claim 7, wherein, The straight top ejector (8) comprises a plurality of straight top rods (21) arranged below the seat back forming lower die (1).

9. The two sided split outside slide eject ejection mechanism for plastic seat back molds of claim 8 wherein, The hole groove forming demolding element (9) comprises a plurality of straight top connecting rods (22) arranged below the seat back forming lower die (1), the straight top connecting rods (22) are provided at the top portions with hole groove forming shafts (23), and the diameters of the hole groove forming shafts (23) are smaller than the diameter of the straight top connecting rods (22).

10. The two sided split outside slide eject ejection mechanism for plastic seat back molds of claim 9, wherein, The seat back forming lower die (1) is provided below with a top rod fixing plate (24), and the straight top rods (21) and the straight top connecting rods (22) are connected with the top rod fixing plate (24) respectively.

Images