A polyurethane molding and punching integrated structure

Abstract

The invention discloses a polyurethane molding punching integrated structure, comprising an upper die core and a lower die core which are arranged correspondingly at the upper and lower parts, a mold cavity is formed between the upper die core and the lower die core, an upper die blade insert is installed on the upper die core, and a lower die blade insert is installed on the lower die core, the upper die blade insert and the lower die blade insert are both located outside the edge of the mold cavity and the positions are adapted to each other, and the upper die blade insert and the lower die blade insert are both hardened. The polyurethane molding punching integrated structure of the invention, by arranging blade inserts on the upper die core and the lower die core, and hardening the upper die blade and the lower die blade, enables synchronous punching of polyurethane during molding, reduces processing procedures and improves the cutting rate of the mold, effectively reduces blade wear and mold maintenance frequency, and thus reduces production costs.

Description

Technical Field

[0001] The invention relates to the technical field of polyurethane production, in particular to a polyurethane molding and punching integrated structure. Background Art

[0002] Polyurethane, also known as polyurethane resin, polyurethane elastomer, polyurethane foam, etc., forms a honeycomb or porous structure through the addition and reaction of physical foaming agents or chemical foaming agents during the production process. It has the characteristics of high strength, tear resistance, and wear resistance. Therefore, it is widely used in daily life, industrial and agricultural production, and medical treatment.

[0003] At present, in the production process of polyurethane, it is generally punched into suitable sizes after being foamed as a whole. However, due to the limitations of existing processes, it is difficult to punch polyurethane synchronously during foaming. Even if a second punching is performed after foaming, the punching effect is not ideal. The stability during punching is poor, resulting in a short blade life, increased mold production costs and personnel investment, low equipment utilization and easy to cause product defects.

[0004] Therefore, in view of the above-mentioned technical problems, it is necessary to provide a new technical solution. Summary of the invention

[0005] The purpose of the present invention is to provide a polyurethane molding and punching integrated structure which can perform synchronous punching during polyurethane foaming and has higher production efficiency and lower operating cost.

[0006] In order to solve the above technical problems, the present invention provides a polyurethane molding and punching integrated structure, and the specific technical solution is as follows:

[0007] A polyurethane molding and punching integrated structure comprises an upper die core and a lower die core which are arranged correspondingly at the upper and lower parts, a mold cavity is formed between the upper die core and the lower die core, an upper die blade insert is installed on the upper die core, and a lower die blade insert is installed on the lower die core, the upper die blade insert and the lower die blade insert are both located outside the edge of the mold cavity and the positions are adapted to each other, and the upper die blade insert and the lower die blade insert are both hardened.

[0008] Preferably, an upper mold pre-embedded support column is embedded in the upper mold core, and a lower mold pre-embedded support column is embedded in the lower mold core. The upper mold pre-embedded support column and the upper mold blade insert are adapted to support the upper mold blade insert to prevent sinking, and the lower mold pre-embedded support column and the lower mold blade insert are adapted to support the lower mold blade insert to prevent sinking.

[0009] Preferably, the upper die cutting edge insert comprises an upper die cutting edge, and the upper die cutting edge is a pointed cutting edge protruding downward.

[0010] Preferably, the lower die blade insert includes a lower die blade, the lower die blade is a flat blade, and the lower die blade is adapted to the upper die blade.

[0011] Preferably, the width of the upper die cutting edge at the blade is 03.-0.7 mm, preferably 0.5 mm.

[0012] Preferably, the hardness of the upper die blade in the upper die blade insert is HRC42-48 degrees, and the hardness of the lower die blade in the lower die blade insert is HRC52-58 degrees.

[0013] Preferably, a pre-embedded hole is opened on one side surface of the upper mold core close to the lower mold core, the upper mold pre-embedded support column is located in the pre-embedded hole, and the embedded end of the upper mold pre-embedded support column abuts against the bottom of the pre-embedded hole.

[0014] Preferably, a pre-embedded hole is also provided on one side surface of the lower mold core close to the upper mold core, the lower mold pre-embedded support column is located in the pre-embedded hole, and the embedded end of the lower mold pre-embedded support column abuts against the bottom of the pre-embedded hole.

[0015] The polyurethane molding and punching integrated structure of the present invention has the following beneficial effects:

[0016] The polyurethane molding and punching integrated structure of the present invention provides a knife edge insert on the upper die core and the lower die core, and hardens the upper die edge and the lower die edge, so that the polyurethane can be punched synchronously during molding, which reduces the processing steps and improves the cutting rate of the mold, effectively reduces the wear of the knife edge and the frequency of mold maintenance, thereby reducing the production cost; in addition, the knife edge insert is supported by the pre-buried support column to prevent the knife edge from sinking during the punching process, further improving the mold cutting rate and improving the production efficiency;

[0017] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solution of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a polyurethane molding and punching integrated structure;

[0020] Figure 2 This is an enlarged schematic diagram of point A.

[0021] Among them, 1-upper mold core; 2-lower mold core; 3-mold cavity; 4-upper mold blade insert; 41-upper mold blade; 5-lower mold blade insert; 51-lower mold blade; 6-upper mold embedded support column; 7-lower mold embedded support column. DETAILED DESCRIPTION

[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0023] Example 1

[0024] See also Figure 1 to Figure 2 A polyurethane molding and punching integrated structure comprises an upper die core 1 and a lower die core 2 which are arranged correspondingly at the upper and lower parts, a mold cavity 3 is formed between the upper die core and the lower die core, an upper die blade insert 4 is installed on the upper die core, and a lower die blade insert 5 is installed on the lower die core, the upper die blade insert and the lower die blade insert are both located outside the edge of the mold cavity and the positions are adapted to each other, and the upper die blade insert and the lower die blade insert are both hardened.

[0025] An upper mold embedded support column 6 is embedded in the upper mold core 1, and a lower mold embedded support column 7 is embedded in the lower mold core. The upper mold embedded support column and the upper mold blade insert 4 are adapted to support the upper mold blade insert to prevent sinking, and the lower mold embedded support column and the lower mold blade insert 5 are adapted to support the lower mold blade insert to prevent sinking.

[0026] The upper die cutting edge insert 4 comprises an upper die cutting edge 41 , and the upper die cutting edge 41 is a sharp cutting edge protruding downward.

[0027] The lower die blade insert 5 comprises a lower die blade 51 , which is a flat blade. The lower die blade 51 is matched with the upper die blade to facilitate punching of polyurethane.

[0028] The width of the upper die blade 41 at the blade is 0.3-0.7 mm. Preferably, the blade width is 0.5 mm. The blade width of 0.5 mm is less difficult to process and has a better punching effect, and is more cost-effective.

[0029] The hardness of the upper die blade 41 in the upper die blade insert 4 is HRC52-58, and the hardness of the lower die blade 51 in the lower die blade insert 5 is HRC42-48. Since the upper die blade is a sharp blade, its wear rate is higher than the lower die blade of a flat blade, so the hardness of the upper die blade needs to be higher than the lower die blade.

[0030] An embedded hole is provided on one side of the upper die core 1 close to the lower die core 2 , and the upper die embedded support column 6 is located in the embedded hole, and the embedded end of the upper die embedded support column abuts against the bottom of the embedded hole.

[0031] A pre-embedded hole is also provided on one side of the lower mold core 2 close to the upper mold core 1 , and the lower mold pre-embedded support column 7 is located in the pre-embedded hole, and the embedded end of the lower mold pre-embedded support column abuts against the bottom of the pre-embedded hole.

[0032] The polyurethane molding and punching integrated structure of this embodiment opens and closes the mold cavity 3 through the relative movement of the upper mold core 1 and the lower mold core 2 during molding. During this process, the upper mold blade insert 4 and the lower mold blade insert 5 move relative to each other to realize the opening and closing of the blade, thereby completing the punching of the polyurethane. The upper mold embedded support column and the lower mold embedded support column support the upper mold blade insert and the lower mold blade insert to prevent the position of the blade insert from changing due to factors such as mold deformation.

[0033] Example 2

[0034] Similar to Example 1, the difference is that the embedded holes on the upper mold core 1 and the lower mold core 2 are through holes, and an upper mold plate and a lower mold plate are also provided on the outside of the upper mold core and the lower mold core. The embedded ends of the upper mold embedded support column 6 and the lower mold embedded support column 7 are respectively flush with the top surface of the upper mold core and the bottom surface of the lower mold core, and are respectively abutted against the upper mold plate and the lower mold plate for support.

[0035] The beneficial effects of the present invention are as follows: by arranging blade inserts on the upper die core and the lower die core, and hardening the upper die blade and the lower die blade, polyurethane can be punched synchronously during molding, reducing the processing steps and improving the cutting rate of the mold, effectively reducing blade wear and mold maintenance frequency, thereby reducing production costs; in addition, the blade insert is supported by pre-embedded support columns to prevent the blade from sinking during the punching process, further improving the mold cutting rate and improving production efficiency.

[0036] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify and vary the above embodiments within the scope of the present invention.

Claims

1. A polyurethane molding and punching integrated structure, characterized in that: The invention comprises an upper die core (1) and a lower die core (2) which are arranged correspondingly at the upper and lower parts, a die cavity (3) is formed between the upper die core and the lower die core, an upper die blade insert (4) is installed on the upper die core, and a lower die blade insert (5) is installed on the lower die core, the upper die blade insert and the lower die blade insert are both located outside the edge of the die cavity and their positions are adapted to each other, and the upper die blade insert and the lower die blade insert are both hardened; an upper die pre-embedded support column (6) is embedded in the upper die core (1), and a lower die pre-embedded support column (7) is embedded in the lower die core, the upper die pre-embedded support column is adapted to the upper die blade insert (4) to support the upper die blade insert to prevent it from sinking, and the lower die pre-embedded support column is adapted to the lower die blade insert (5) to support the lower die blade insert to prevent it from sinking.

2. The polyurethane molding and punching integrated structure according to claim 1, characterized in that: The upper die blade insert (4) comprises an upper die blade (41), and the upper die blade (41) is a pointed blade protruding downward.

3. The polyurethane molding and punching integrated structure according to claim 2, characterized in that: The lower die blade insert (5) comprises a lower die blade (51), the lower die blade (51) is a flat blade, and the position of the lower die blade matches that of the upper die blade.

4. The polyurethane molding and punching integrated structure according to claim 2, characterized in that: The width of the upper die cutting edge (41) at the cutting edge is 0.3-0.7 mm.

5. The polyurethane molding and punching integrated structure according to claim 3, characterized in that: The hardness of the upper die blade (41) in the upper die blade insert (4) is 52-58 HRC, and the hardness of the lower die blade (51) in the lower die blade insert (5) is 42-48 HRC.

6. The polyurethane molding and punching integrated structure according to claim 1, characterized in that: An embedded hole is provided on one side surface of the upper die core (1) close to the lower die core (2), and the upper die embedded support column (6) is located in the embedded hole, and the embedded end of the upper die embedded support column abuts against the bottom of the embedded hole.

7. The polyurethane molding and punching integrated structure according to claim 1, characterized in that: A pre-embedded hole is also provided on one side of the lower die core (2) close to the upper die core (1), and a lower die pre-embedded support column (7) is located in the pre-embedded hole, and the embedded end of the lower die pre-embedded support column abuts against the bottom of the pre-embedded hole.

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