Foaming mold with back-off foam

Abstract

The foaming mold comprises an upper mold and a lower mold which are oppositely arranged up and down, a movable block is detachably installed at the position, corresponding to an inverted buckle, of the lower mold through an installation structure, and an inverted buckle protrusion matched with the inverted buckle in width is arranged in the middle of the movable block. The thickness of the upper end of the inverted buckle protrusion is matched with the inverted buckle amount of the inverted buckle, the installation structure comprises a positioning structure used for positioning and a fixing structure used for fixing, and a fit clearance is reserved between the movable block and the lower die after the movable block is installed. The movable block is arranged on the lower die, the thickness of the upper end of the inverted buckle protrusion on the movable block is matched with the inverted buckle amount, and the gap facilitating exhaust and foam forming is reserved between the movable block and the lower die, so that it can be guaranteed that the inverted buckle cannot have the forming defect or die opening tearing or other problems in the foam forming process.

Description

Technical Field

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

[0002] In foam products, undercuts are often incorporated to facilitate installation or the attachment of other components. In existing technologies, these undercuts are formed as follows: Figure 1 As shown, a fixing block is installed at the lower end of the undercut, which is then fixed to the foaming mold to form the flat surface of the undercut. For undercuts with an undercut depth greater than 5mm, this foaming molding technology may result in molding defects or mold opening tears on the bottom surface of the undercut. Figure 1 Side B of the film. Utility Model Content

[0003] This utility model proposes a foaming mold with undercut foam, which can solve the molding defects or mold opening tears that occur when the undercut amount is greater than 5mm.

[0004] Therefore, the technical solution adopted by this utility model is as follows: a foaming mold with undercut foam, including an upper mold and a lower mold arranged opposite to each other. A movable block is detachably installed on the lower mold at the position corresponding to the undercut through an installation structure. An undercut protrusion matching the width of the undercut is provided in the middle of the movable block, and the thickness of the upper end of the undercut protrusion matches the undercut amount. The installation structure includes a positioning structure for positioning and a fixing structure for fixing, and a fitting gap is left between the movable block and the lower mold after installation.

[0005] As a preferred embodiment of the above scheme, the positioning structure includes a positioning protrusion on the lower mold, and a positioning groove is provided on the movable block at the position corresponding to the protrusion.

[0006] More preferably, the fixing structure includes magnets correspondingly embedded in the lower mold and the movable block.

[0007] Further preferably, the movable block has a retrieval groove in the middle for easy retrieval.

[0008] Further preferred, the thickness of the inverted protrusion gradually decreases from top to bottom.

[0009] The beneficial effects of this utility model are as follows: by setting a movable block on the lower mold, and the thickness of the upper end of the undercut protrusion on the movable block matches the undercut amount, and the movable block is installed with a gap between it and the lower mold to facilitate venting and foam molding, it can be ensured that the undercut will not have molding defects or mold opening tearing problems during foam molding. Attached Figure Description

[0010] Figure 1This is a schematic diagram of a mold in the prior art.

[0011] Figure 2 This is a schematic diagram of the present invention.

[0012] Figure 3 This is a schematic diagram of the foamed product of this utility model.

[0013] Figure 4 This is a schematic diagram of the lower mold in this utility model.

[0014] Figure 5 This is a schematic diagram of the movable block in this utility model. Figure 1 .

[0015] Figure 6 This is a schematic diagram of the movable block in this utility model. Figure 2 .

[0016] Reference numerals: lower mold-1, positioning protrusion-1a, movable block-2, undercut protrusion-2a, positioning groove-2b, and removal groove-2c. Detailed Implementation

[0017] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0018] like Figures 2-6 As shown, a foaming mold with an undercut mainly consists of an upper mold and a lower mold arranged opposite each other. A movable block 2 is detachably mounted on the lower mold 1 at the position corresponding to the undercut via an installation structure. In this case, the movable block is located at the lower end of the undercut. Simultaneously, an undercut protrusion 2a matching the width of the undercut is provided in the middle of the movable block 2, and the thickness of the upper end of the undercut protrusion 2a matches the undercut amount. Alternatively, the movable block can be placed on the upper mold according to molding requirements. In this case, the movable block is located at the upper end of the undercut, meaning the thickness of the lower end of the undercut protrusion matches the undercut amount.

[0019] The mounting structure includes a positioning structure for positioning and a fixing structure for fixing, with a fitting clearance between the movable block 2 and the lower mold 1 after installation. The positioning structure includes a positioning protrusion 1a on the lower mold 1, and a positioning groove 2b on the movable block 2 corresponding to the protrusion position for the positioning protrusion to insert into. The fitting protrusion is formed between the positioning protrusion and the positioning groove. Alternatively, the positioning structure can also employ positioning pins or positioning blind holes.

[0020] The fixing structure includes magnets embedded in the lower mold 1 and the movable block 2, preferably using strong magnets. The magnets are embedded in the positions where the original bolts used to fix the fixing block pass through. This structure can reduce the need for modification of the original mold, thereby reducing costs. Of course, the magnets can also be placed on the opposite surfaces of the positioning groove and the positioning protrusion.

[0021] To facilitate the disassembly of the movable block, a retrieval groove 2c is provided in the middle of the movable block 2 for easy removal. To facilitate the removal of the foamed product, the thickness of the inverted protrusion 2a gradually decreases from top to bottom.

[0022] Since there is a gap between the movable block 2 and the lower mold 1 after installation, the positioning block needs to be removed periodically and the residue in the gap cleaned to prevent it from affecting subsequent foaming. It is best to clean it once a day (two shifts) after foaming.

Claims

1. A foaming mold with inverted foam, comprising an upper mold and a lower mold arranged opposite each other, characterized in that: A movable block (2) is detachably installed on the lower mold (1) at the position corresponding to the undercut via an installation structure. The movable block (2) has an undercut protrusion (2a) in the middle that matches the width of the undercut, and the thickness of the upper end of the undercut protrusion (2a) matches the undercut amount. The installation structure includes a positioning structure for positioning and a fixing structure for fixing, and a fitting gap is left between the movable block (2) and the lower mold (1) after installation.

2. The foaming mold with inverted foam as described in claim 1, characterized in that: The positioning structure includes a positioning protrusion (1a) on the lower mold (1) and a positioning groove (2b) on the movable block (2) corresponding to the position of the protrusion.

3. The foaming mold with inverted foam as described in claim 1, characterized in that: The fixed structure includes magnets embedded in the lower mold (1) and the movable block (2).

4. The foaming mold with inverted foam as described in claim 1, characterized in that: The movable block (2) is provided with a retrieval groove (2c) in the middle to facilitate the retrieval of the movable block.

5. The foaming mold with inverted foam as described in claim 1, characterized in that: The thickness of the inverted protrusion (2a) gradually decreases from top to bottom.

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