Matching structure of EPP (Expanded Polypropylene) and rear-row large seat cushion foaming mold

Abstract

The utility model discloses an EPP and rear-row large seat cushion foaming mold matching structure which comprises EPP and a foaming mold body, the foaming mold body comprises an upper mold and a lower mold, the EPP is installed on the upper mold and used for being integrally formed with a rear-row large seat cushion in a foaming mode, and a plurality of assembling holes used for fixing a face sleeve are formed in the position, close to the edge, of the EPP in the circumferential direction. A circle of groove is formed in the periphery of the edge of the EPP, a circle of material blocking rib corresponding to the groove is arranged on the inner cavity face of the upper die, the height of the material blocking rib is 3-4 mm, the thickness of the material blocking rib is 3-4 mm, the material blocking rib is embedded in the groove, the material blocking rib and the groove are matched to form sealing, a plurality of foaming holes are formed in the position, away from the edge, of the EPP, and foam of the rear-row large seat cushion can be embedded into the foaming holes during foaming. According to the utility model, a layer of foam or a foam raw material is prevented from permeating into the outer surface of the EPP to flow into the EPP assembly groove to block the assembly hole, and the firmness of integral foaming molding of the EPP and the rear-row large seat cushion is also ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile seats, in particular to a matching structure of an EPP and a foaming mould for a rear large seat cushion. Background Art

[0002] At present, the most common anti-overflow structure is: EPP is directly matched with the mold, and EPP is embedded in the foaming mold cavity for integrated foaming by chemical pouring. This method can easily cause the foam to flow into the groove of EPP during the integrated foaming process of the foam mold, blocking the EPP assembly hole and causing quality defects. The assembly hole can only be cleaned manually, which has high strength and labor costs. The existing patent CN202221938167.9 "A spill-proof rear seat combination structure" improves this problem, but the changes mainly involve the EPP structure and the mold structure, and the scope and amount of changes are large. In addition, due to the large amount of shrinkage and deformation of EPP, if the EPP assembly hole is small, the protruding position of the mold will be difficult to match. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the utility model aims to provide a structure for cooperating between EPP and a foaming mold for a large rear seat cushion to prevent a layer of foam from penetrating the surface of the EPP or the foam raw material from flowing into the EPP assembly groove to block the assembly hole.

[0004] The utility model proposes a matching structure of an EPP and a foaming mold for a large rear seat cushion, comprising an EPP and a foaming mold body, wherein the foaming mold body comprises an upper mold and a lower mold, the EPP is mounted on the upper mold and is used for integral foaming and molding with the large rear seat cushion, a plurality of assembly holes for fixing a face cover are circumferentially arranged near the edge of the EPP, a circle of grooves is arranged around the edge of the EPP, a circle of material stop ribs is arranged on the inner cavity surface of the upper mold corresponding to the grooves, the height of the material stop ribs is 3 to 4 mm, and the thickness is 3 to 4 mm, the material stop ribs are embedded in the grooves, and the two cooperate to form a seal, a plurality of foaming holes are arranged on the EPP away from the edge, and the foaming holes are used for embedding foam of the large rear seat cushion during foaming.

[0005] In the above scheme: a plurality of positioning columns are convexly provided on the inner cavity surface of the upper mold, and positioning holes are provided on the EPP corresponding to each positioning column. The EPP is fixed on the positioning columns through the positioning holes. The positioning columns play the role of installation and positioning to prevent the EPP from being subjected to impact force and changing its position during injection, that is, to prevent the EPP from moving forward, backward, left and right.

[0006] In the above scheme: there are four positioning posts, and the four positioning posts are arranged at intervals in a trapezoidal shape to ensure the installation positioning effect of the positioning posts.

[0007] In the above scheme: the height of the material blocking rib is 3mm, the thickness is 3mm, the operation is convenient, and the modification amount is small.

[0008] In the above scheme: there are five foaming holes, and the five foaming holes are arranged at intervals in an isosceles trapezoidal shape.

[0009] In the above scheme: a plurality of anti-dropping columns for passing through and clamping the EPP are arranged on the inner cavity surface of the upper mold to prevent the EPP from falling from the upper mold.

[0010] The beneficial effects of the utility model are: 1. A circle of grooves are arranged on the edge of the EPP, and a material stop rib is arranged on the inner cavity surface of the upper mold corresponding to the groove, so that the material stop rib is embedded in the groove to form a sealed joint, so as to block the foam raw material from flowing into the outer surface of the EPP, thereby avoiding a layer of foam penetrating the outer surface of the EPP or the foam raw material flowing into the EPP assembly groove to block the assembly hole; 2. A plurality of foaming holes are arranged on the EPP, and the rear large seat cushion is embedded in the foaming holes during foaming, thereby increasing the contact area, which is beneficial to ensure the firmness of the integrated foaming molding of the EPP and the rear large seat cushion; 3. The overall modification is small, the structure is simple, the cost is low, and the operation is convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of the upper die in the utility model.

[0012] Figure 2 It is a structural schematic diagram of the EPP in the utility model. DETAILED DESCRIPTION

[0013] like Figure 1 As shown in FIG. 2, an EPP and rear large seat cushion foaming mold matching structure is mainly composed of EPP2 and a foaming mold body. The foaming mold body includes an upper mold 1 and a lower mold. The EPP2 is installed on the upper mold 1 and is used for integral foaming with the rear large seat cushion.

[0014] Several assembly holes for fixing the face cover are circumferentially provided near the edge of EPP2, a circle of grooves is provided around the edge of EPP2, and a circle of material stop ribs 11 is provided on the inner cavity surface of the upper mold 1 corresponding to the grooves. The height of the material stop rib 11 is 3 to 4 mm, and the thickness is 3 to 4 mm. The material stop rib 11 is embedded in the groove, and the two cooperate to form a seal to prevent the foam raw material from flowing into the outer surface of EPP2, thereby preventing a layer of foam from penetrating the outer surface of EPP2 or the foam raw material from flowing into the assembly groove of EPP2 to block the assembly hole.

[0015] A plurality of foaming holes 21 are provided on the EPP2 at positions away from the edges. The foaming holes 21 are used for embedding the foam of the rear large seat cushion during foaming, so as to increase the firmness of the integral foaming molding of the EPP2 and the rear large seat cushion.

[0016] Preferably, a plurality of positioning posts 12 are convexly provided on the inner cavity surface of the upper mold 1, and positioning holes are provided on EPP2 corresponding to each positioning post 12. EPP2 is fixed on the positioning posts 12 through the positioning holes. The positioning posts 12 play the role of installation and positioning to prevent EPP2 from being subjected to impact force and changing its position during injection, that is, to prevent EPP2 from moving forward, backward, left, and right.

[0017] Preferably, there are four positioning posts 12 , and the four positioning posts 12 are arranged at intervals in a trapezoidal shape to ensure the installation positioning effect of the positioning posts 12 .

[0018] Preferably, the height of the retaining rib 11 is 3 mm and the thickness is 3 mm, which is easy to operate and requires little modification.

[0019] Preferably, there are five foaming holes 21, and the five foaming holes 21 are arranged at intervals in an isosceles trapezoidal shape.

[0020] Preferably, a plurality of anti-fall-off columns 13 for passing through and clamping EPP2 are provided on the inner cavity surface of the upper mold 1 to prevent EPP2 from falling off the upper mold 1.

Claims

1. An EPP and rear large seat cushion foaming mold matching structure, comprising an EPP (2) and a foaming mold body, wherein the foaming mold body comprises an upper mold (1) and a lower mold, wherein the EPP (2) is mounted on the upper mold (1) and is used for integral foaming with the rear large seat cushion, and a plurality of assembly holes for fixing a face cover are provided on the EPP (2) near the edge along the circumferential direction, wherein the EPP (2) is characterized in that: A circle of grooves is arranged around the edge of the EPP (2); a circle of material stop ribs (11) is arranged on the inner cavity surface of the upper mold (1) corresponding to the grooves; the height of the material stop ribs (11) is 3 to 4 mm, and the thickness is 3 to 4 mm; the material stop ribs (11) are embedded in the grooves, and the two cooperate to form a seal; a plurality of foaming holes (21) are arranged on the EPP (2) away from the edge; the foaming holes (21) are used for embedding foam of the rear large seat cushion during foaming.

2. The EPP and rear large seat cushion foaming mold matching structure according to claim 1 is characterized by: A plurality of positioning posts (12) are convexly provided on the inner cavity surface of the upper mold (1), and positioning holes are provided on the EPP (2) corresponding to each positioning post (12), and the EPP (2) is fixed on the positioning post (12) by limiting the positioning holes.

3. The EPP and rear large seat cushion foaming mold matching structure according to claim 2 is characterized in that: There are four positioning posts (12), and the four positioning posts (12) are arranged at intervals in a trapezoidal shape.

4. The EPP and rear large seat cushion foaming mold matching structure according to claim 1 is characterized in that: The material blocking rib (11) has a height of 3 mm and a thickness of 3 mm.

5. The EPP and rear large seat cushion foaming mold matching structure according to claim 1 is characterized by: There are five foaming holes (21), and the five foaming holes (21) are arranged at intervals in an isosceles trapezoidal shape.

6. The EPP and rear large seat cushion foaming mold matching structure according to claim 1 is characterized in that: A plurality of anti-slip columns (13) for passing through and clamping the EPP (2) are provided on the inner cavity surface of the upper mold (1).

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