Cut-off tool for flow channel of foaming punching die
By designing a homemade cutter resin sealing guide block in the foaming die, the problem of foaming material penetration into the cutting knife guide is solved, and the smooth progress of the foaming process and the reduction of product manufacturing costs are achieved.
Patent Information
- Application Number
- CN202411990831.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-02-14
AI Technical Summary
In multi-cavity foaming molds, the prior art is difficult to effectively prevent the foaming material from penetrateing into the gap between the cutting knife and the lower mold kernel, resulting in the cutting knife guide and increasing product manufacturing costs.
A foam punching die runner cutting knife is designed, and a homemade cutter resin sealing guide block is used to slide the gap between the cutting knife and the die-core runner to ensure that the foaming material does not penetrate.
Through the sealing design, the foaming material is prevented from penetrated into the cutting knife guide and the smooth progress of the product foaming process is achieved, the product manufacturing cost is reduced, and the cutting effect is ensured.
Smart Images
Figure CN119427633A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of foaming punching and cutting die machinery, in particular to a foaming punching and cutting die flow channel cutting knife. Background Art
[0002] For multi-cavity foaming molds, the foaming machine used for the customer's on-site matching mold has only one gun head for injection. In view of this situation, the center position of multiple product rows is used as the gun head injection position, and the foaming material is guided to the product area through the dark flow channel in the mold (injection material flow channel), so as to realize the solution of foaming multiple products with a single gun head. The defect of the solution is that the foaming material inside the flow channel needs to be manually cut off when the operator takes the product, which is easy to cause damage to the product and increase the cost of product manufacturing. Therefore, a cutting knife needs to be designed inside the flow channel to cut off the waste materials other than the product. At present, the cutting knife is inserted into the flow channel for cutting, which is easy to achieve, but during the foaming process, the foaming material has strong flow channel properties and is easy to penetrate into the gap between the cutting knife and the lower mold core, causing the cutting knife guide to be blocked. Summary of the invention
[0003] In order to solve the above technical problems, the present invention proposes a foaming punching die runner cutting knife, which has an ingenious design, a reasonable and compact structure, and can seal the foaming material during the foaming process to prevent drilling into the cutting knife guide and causing jamming.
[0004] The technical solution of the present invention: A foam punching die runner cutting knife, the foam punching die comprises an upper die core, a lower die core, and a foaming material injection gun, the upper die core can be buckled on the lower die core and two left and right product foaming material cavities are designed between the upper die core and the lower die core, the two product foaming material cavities are connected by an injection material flow channel, a foaming material injection gun is installed at the upper end of the upper die core, the lower end of the foaming material injection gun is connected to the injection material flow channel near the middle position, a foam punching die runner cutting knife is installed below the lower die core, it comprises a cutting knife, a cutting knife fixing plate, a cutting knife guide seat, a cutting knife resin sealing guide block, a cutting knife cylinder, and a knife pad, a cutting knife cylinder is installed below the lower die core, and a cutting knife fixing plate is installed at the telescopic end of the upper end of the cutting knife cylinder A fixed plate and a cutting knife are installed on the cutting knife fixing plate, and a cutting knife guide seat is installed under the lower mold core. A first through groove is opened on the cutting knife guide seat, and a groove with a rough inner wall or knurling treatment is opened on the inner side of the lower end of the first through groove. A cutting knife resin sealing guide block is installed in the groove. A guide groove for sliding and sealing cooperation of the upper end of the cutting knife is designed in the middle of the cutting knife resin sealing guide block. The guide groove is connected with the first through groove. A guide port is opened at the port position of the injection channel under the lower mold core, and the guide port is connected with the first through groove below. The cutting knife can slide through the guide groove, the first through groove and the guide port in sequence. The knife pad is installed under the upper mold core and the knife pad is located above the cutting knife.
[0005] The cutter resin sealing guide block is formed by integrally curing the resin glue by pouring.
[0006] The groove bottom surface of the cutter guide seat and the upper surface of the cutter guide seat are designed to be parallel to each other.
[0007] There are two cutting knives, which are respectively mounted on the upper ends of the cutting knife fixing plates and located below the two ends of the injection flow channel. Corresponding guide openings for the cutting knives to pass through are provided below the injection flow channel.
[0008] The manufacturing and installation process of the cutter resin sealing guide block, Step 1: surface finishing of the cutting knife, requiring a roughness of Ra0.6-0.8; Step 2: spraying a release agent on the surface of the cutting knife; Step 3, rough processing is performed inside the groove of the cutter guide seat, and the roughness of the inner wall of the groove is increased by grooving or knurling; Step 4: Place the cutter guide seat with the groove facing upward and slide the cutter into the first through groove of the cutter guide seat. Step 5: Pour the resin glue into the gap between the cutting knife and the groove of the cutting knife guide seat, and wait for 24 hours for curing; Step 6: After solidification at room temperature, the cutting knife is taken out, and the cutting knife resin sealing guide block is poured and connected in the groove of the cutting knife guide seat.
[0009] The resin glue comprises glue A and glue B, wherein glue A is a filler and glue B is a curing agent, and the weight ratio of glue A to glue B is 5:1.
[0010] The A glue and the B glue are stirred and mixed according to the proportion before use, stirred for 2 minutes at room temperature, and then poured into the gap between the cutting knife and the groove of the cutting knife guide seat for curing.
[0011] The invention has the advantages that the clearance between the cutting knife and the mold core flow channel is slidably sealed by a self-made cutting knife resin sealing guide block; when the flow channel is injected with material, the cutting knife is retracted without affecting the foaming of the product; after the injection is completed, the cutting knife is extended to cut the product; the structural design is ingenious, reasonable, compact and stable, without potential safety hazards, and has a good cutting effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the present invention.
[0013] Figure 2 It is a vertical cross-sectional schematic diagram of the injection material flow channel of the present invention.
[0014] Figure 3 It is a simplified schematic diagram of the cutting blade of the present invention. DETAILED DESCRIPTION
[0015] See attached Figure 1-3, a foaming punching die flow cutting knife, the foaming punching die includes an upper die core 1, a lower die core 2, and a foaming material injection gun 3. The upper die core 1 can be buckled on the lower die core 2 and two left and right product foaming material cavities 4 are designed between the upper die core 1 and the lower die core 2. The two product foaming material cavities 4 are connected by an injection material flow channel 5. A foaming material injection gun 3 is installed at the upper end of the upper die core 1. The lower end of the foaming material injection gun 3 is connected to the injection material flow channel 5 near the middle position. A foaming punching die flow cutting knife is installed below the lower die core 2, which includes a cutting knife 6, a cutting knife fixing plate 7, a cutting knife guide seat 8, a cutting knife resin sealing guide block 9, a cutting knife cylinder 10, and a knife pad 11. A cutting knife cylinder 10 is installed below the lower die core 2, and the telescopic end of the upper end of the cutting knife cylinder 10 is installed A cutter fixing plate 7 is provided, a cutting knife 6 is installed on the cutter fixing plate 7, a cutter guide seat 8 is installed under the lower die core 2, a first through groove is provided on the cutter guide seat 8, and a groove with a rough inner wall or knurling treatment is provided on the inner side of the lower end of the first through groove, a cutter resin sealing guide block 9 is installed in the groove, a guide groove for sliding and sealing cooperation of the upper end of the cutter 6 is designed in the middle of the cutter resin sealing guide block 9, and the guide groove is connected with the first through groove, a guide opening is provided at the port position of the injection material flow channel 5 below the lower die core 2, and the lower part of the guide opening is connected with the first through groove, and the cutter 6 can slide through the guide groove, the first through groove and the guide opening in sequence, and a knife pad 11 is provided under the upper die core 1 and the knife pad 11 is located above the cutter 6. The upper end of the cutter guide seat can extend into the guide opening of the lower die core, and the upper end surface of the cutter guide seat is designed to imitate the lower flow channel profile structure of the injection material flow channel, and the cutter guide seat is sealed and embedded on the lower die core.
[0016] The cutter resin sealing guide block 9 is formed by integrally curing and pouring resin glue.
[0017] The bottom surface of the groove of the cutter guide seat 8 and the top surface of the cutter guide seat 8 are designed to be parallel to each other.
[0018] There are two cutting knives 6, which are respectively mounted on the upper end of the cutting knife fixing plate 7 and located below the two ends of the injection material flow channel 5. Corresponding guide openings for the cutting knives 6 to pass through are opened below the injection material flow channel 5. The cutting edge of the cutting knife is designed according to the shape of the injection material flow channel, and the front section of the cutting edge of the cutting knife is designed with a 0.3mm wide blade. The knife pad adopts a steel knife pad.
[0019] The manufacturing and installation process of the cutter resin sealing guide block 9 is as follows: Step 1: surface finishing of the cutting blade 6, with a required roughness of Ra0.6-0.8; Step 2: spraying a release agent on the surface of the cutting blade 6; Step 3: Rough processing is performed inside the groove of the cutter guide seat 8, and the roughness of the inner wall of the groove is increased by grooving or knurling; this method is to increase the adhesion between the cured cutter resin sealing guide block and the groove to prevent it from being pulled out together with the cutting knife during demoulding; Step 4: The groove of the cutter guide seat 8 is placed upward and the cutting knife 6 is slidably inserted into the first through groove of the cutter guide seat 8. Step 5: Pour the resin glue into the gap between the cutting blade 6 and the groove of the cutting blade guide seat 8, and wait for 24 hours for curing; Step six, after solidification at room temperature, the cutting knife 6 is taken out, and the cutting knife resin sealing guide block 9 is poured and connected in the groove of the cutting knife guide seat 8.
[0020] The resin glue includes glue A and glue B, wherein glue A is a filler (754A) and glue B is a curing agent (754B), and the weight ratio of glue A to glue B is 5:1. The two glues can be quickly mixed and cured, and have good sealing and lubricity after curing and molding, ensuring the sliding sealing between the cutting knife and the cutter resin sealing guide block after molding, and preventing the foaming material from seeping out and causing the jamming problem.
[0021] The A glue and the B glue are stirred and mixed according to the proportion before use, stirred for 2 minutes at room temperature, and then poured into the gap between the cutting knife 6 and the groove of the cutting knife guide seat 8 for curing.
[0022] The cutting knife structure of the present invention is in a retracted state before mold closing, and when retracted, it is 1-2mm below the injection material flow channel of the foaming mold. After mold closing, liquid foaming material is injected into the mold cavity. When the foaming material flows through the injection material flow channel, the resin glue and the punching knife cooperate perfectly without gaps, ensuring that the foaming material flows smoothly through the injection material flow channel; after the injection is completed, after the product is foamed and matured, the top of the cutter cylinder carries the cutter fixing plate upward, and the cutter fixing plate simultaneously carries two cutting knives to slide and eject in the first through groove of the cutter resin sealing guide block and the cutter guide seat, to the upper knife pad, flatly cut the waste material 12 in the injection material flow channel and connect it with the product 13; after the mold is opened, the product 13 and the waste material 12 are taken out. The number of cutting knives designed for double-station foaming products of the present invention can be increased accordingly in the actual production process according to the number of foaming stations.
Claims
1. Foaming punching die runner cutting knife, the foaming punching die includes an upper die core, a lower die core, and a foaming material injection gun, the upper die core can be buckled on the lower die core and two product foaming material cavities are designed to be formed between the upper die core and the lower die core, the two product foaming material cavities are connected through an injection material flow channel, the upper end of the upper die core is equipped with a foaming material injection gun, the lower end of the foaming material injection gun is connected to the injection material flow channel near the middle position, the foaming punching die runner cutting knife is installed below the lower die core, characterized in that, The utility model comprises a cutting knife, a cutting knife fixing plate, a cutting knife guide seat, a cutting knife resin sealing guide block, a cutting knife cylinder and a knife pad. A cutting knife cylinder is installed below the lower die core, a cutting knife fixing plate is installed at the telescopic end of the upper end of the cutting knife cylinder, a cutting knife is installed on the cutting knife fixing plate, a cutting knife guide seat is installed below the lower die core, a first through groove which runs through from top to bottom is provided on the cutting knife guide seat, and a groove with a rough inner wall or knurling treatment is provided on the inner side of the lower end of the first through groove, a cutting knife resin sealing guide block is installed in the groove, a guide groove for sliding and sealing cooperation of the upper end of the cutting knife is designed in the middle of the cutting knife resin sealing guide block, the guide groove is connected with the first through groove, a guide opening is provided at the port position of the injection channel below the lower die core, the lower part of the guide opening is connected with the first through groove, the cutting knife can slide through the guide groove, the first through groove and the guide opening in sequence, and the knife pad is installed below the upper die core and the knife pad is located above the cutting knife.
2. The foaming die runner cutting knife according to claim 1, characterized in that: The cutter resin sealing guide block is formed by integrally curing by pouring resin glue.
3. The foaming punching die runner cutting knife according to claim 1, characterized in that: The groove bottom surface of the cutter guide seat and the upper surface of the cutter guide seat are designed to be parallel to each other.
4. The foaming punching die runner cutting knife according to claim 1, characterized in that: There are two cutting knives, which are respectively mounted on the upper ends of the cutting knife fixing plates and located below the two ends of the injection flow channel. Corresponding guide openings for the cutting knives to pass through are provided below the injection flow channel.
5. The foaming punching die flow channel cutting knife according to claim 1 or 2, characterized in that: The manufacturing and installation process of the cutter resin sealing guide block, Step 1: surface finishing of the cutting knife, requiring a roughness of Ra0.6-0.8; Step 2: spraying a release agent on the surface of the cutting knife; Step 3, rough processing is performed inside the groove of the cutter guide seat, and the roughness of the inner wall of the groove is increased by grooving or knurling; Step 4: Place the cutter guide seat with the groove facing upward and slide the cutter into the first through groove of the cutter guide seat. Step 5: Pour the resin glue into the gap between the cutting knife and the groove of the cutting knife guide seat, and wait for 24 hours for curing; Step 6: After solidification at room temperature, the cutting knife is taken out, and the cutting knife resin sealing guide block is poured and connected in the groove of the cutting knife guide seat.
6. The foaming punching die runner cutting knife according to claim 5, characterized in that: The resin glue comprises glue A and glue B, wherein glue A is a filler and glue B is a curing agent, and the weight ratio of glue A to glue B is 5:
1.
7. The foaming punching die runner cutting knife according to claim 6, characterized in that: The A glue and the B glue are stirred and mixed according to the proportion before use, stirred for 2 minutes at room temperature, and then poured into the gap between the cutting knife and the groove of the cutting knife guide seat for curing.