Foaming mold with sharp corner foam

Abstract

The foaming mold comprises an upper mold and a lower mold which are oppositely arranged up and down, a forming groove used for forming the sharp corner is formed in the position, corresponding to the sharp corner of the foam, of the upper mold, and a first flow guide groove extending along the forming groove is formed in the bottom of the forming groove. A forming plane used for forming side wings is arranged at the position, close to the forming groove, of the upper die, and at least two exhaust needles communicated with the forming plane and used for exhausting are arranged above the upper die at intervals. According to the foam forming device, gas in other places is exhausted through the exhaust needle and does not enter the forming groove, meanwhile, the first flow guide groove is formed in the forming groove and used for collecting the gas located in the forming groove, and therefore it is guaranteed that a sharp corner structure in foam is smoothly formed, and a formed product does not have forming defects.

Description

Technical Field

[0001] This utility model belongs to the field of foaming mold technology, specifically relating to a foaming mold with pointed foam. Background Technology

[0002] In car seats, the foam used for the seats needs to be compatible with the seat structure. Sharp corner structures are designed at both ends of the foam in the front of the seat, with one side of each corner serving as a wing. When these corners are formed using a foaming mold, the corners, being the highest point of the mold, also become air accumulation points. Because foaming gas tends to accumulate at these points, molding defects are prone to occur during the molding process. These defects result in an uneven surface on the seat after the foam is encapsulated. Utility Model Content

[0003] This utility model proposes a foaming mold with sharp corners, which can ensure that the sharp corner structure in the foam is formed smoothly, so that the molded product has no molding defects.

[0004] Therefore, the technical solution adopted by this utility model is as follows: a foaming mold for foam with sharp corners, including an upper mold and a lower mold arranged opposite to each other. The upper mold is provided with a forming groove for forming the sharp corners at the position corresponding to the foam. The bottom of the forming groove is provided with a first guide groove extending along the forming groove. The upper mold is provided with a forming plane for forming the side wings near the forming groove. At least two venting pins are provided at intervals above the upper mold and communicate with the forming plane for venting.

[0005] As a preferred embodiment of the above scheme, the depth of the first guide channel is between 1.5 and 2.5 times its width.

[0006] Further preferably, a plurality of second guide grooves are provided at intervals on the forming plane, and the depth of the second guide grooves is between 1 and 2 times the width, and the second guide grooves are not connected to the exhaust needle.

[0007] The beneficial effects of this utility model are as follows: the gas in other places is discharged through the exhaust needle, so that it will not enter the molding groove. At the same time, a first guide groove is provided in the molding groove to collect the gas located in the molding groove, thereby ensuring that the sharp corner structure in the foam is formed smoothly, so that the molded product has no molding defects. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the present invention.

[0009] Reference numerals: forming groove-1, first guide groove-2, forming plane-3, exhaust pin-4, second guide groove-5. Detailed Implementation

[0010] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0011] like Figure 1 As shown, a foaming mold for foam with sharp corners mainly consists of an upper mold and a lower mold arranged opposite each other. The upper mold has a molding groove 1 for molding the sharp corners at the corresponding positions of the foam, and a molding plane 3 for molding the side wings is provided on the upper mold near the molding groove 1.

[0012] To reduce the amount of gas entering the molding groove, at least two venting pins 4 are provided at intervals above the upper mold, communicating with the molding plane 3 and used for venting. To ensure that the gas in the molding groove does not affect the molding of sharp corners, a first guide groove 2 extending along the molding groove is provided at the bottom of the molding groove 1.

[0013] Ideally, the depth of the first guide channel 2 should be between 1.5 and 2.5 times its width, resulting in a higher overall depth that effectively ensures the molding of sharp corners. Simultaneously, a burr will be generated at the location of the first guide channel after molding. Since this foam is encased in the seat cover and the burr is inside the plastic back panel, it will not affect the overall appearance without trimming. In this application, the width of the first guide channel is 3mm and the depth is 6mm.

[0014] To facilitate exhaust from the side wing, several second guide grooves 5 are provided at intervals on the forming plane 3, and the depth of the second guide grooves 5 is between 1 and 2 times the width. The second guide grooves 5 are not connected to the exhaust needle 4.

Claims

1. A foaming mold for foam with pointed corners, comprising an upper mold and a lower mold arranged opposite each other, wherein the upper mold is provided with a forming groove (1) for forming the pointed corners at positions corresponding to the pointed corners of the foam, characterized in that: The bottom of the forming groove (1) is provided with a first guide groove (2) extending along the forming groove. The upper mold is provided with a forming plane (3) for forming the side wings near the forming groove (1). At least two exhaust pins (4) that communicate with the forming plane (3) and are used for exhaust are provided at intervals above the upper mold.

2. The foaming mold with pointed foam as described in claim 1, characterized in that: The depth of the first guide groove (2) is between 1.5 and 2.5 times its width.

3. The foaming mold with pointed foam as described in claim 1, characterized in that: The forming plane (3) is provided with a plurality of second guide grooves (5) at intervals, and the depth of the second guide grooves (5) is between 1 and 2 times the width. The second guide grooves (5) are not connected to the exhaust needle (4).

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