CN215619524U

CN215619524U - PUR foaming mold utensil

Info

Publication number: CN215619524U
Application number: CN202121141763.XU
Authority: CN
Inventors: 马仁后
Original assignee: Shanghai Huagu Vehicle Industry Co ltd
Current assignee: Shanghai Huagu Vehicle Industry Co ltd
Priority date: 2021-05-26
Filing date: 2021-05-26
Publication date: 2022-01-25
Anticipated expiration: 2031-05-26

Abstract

The utility model relates to a PUR foaming mold which comprises an upper mold (1), an insert block (2), a lower mold (3) and at least one linkage mechanism, wherein the upper mold (1) is arranged above the lower mold (3), a product cavity (4) for foaming is arranged between the upper mold (1) and the lower mold (3), the insert block (2) is movably positioned in the product cavity (4), the linkage mechanism movably penetrates through the upper mold (1) and is connected with the insert block (2), and a side exhaust port (5) for communicating the outside and the product cavity (4) is reserved between the upper mold (1) and the lower mold (3). Compared with the prior art, the utility model solves the problem of the defects of the PUR foaming surface, ensures that the PUR product is fully foamed, has complete surface appearance and no corner and material shortage phenomenon, and meets the requirements.

Description

PUR foaming mold utensil

Technical Field

The utility model belongs to the field of foaming molds, and particularly relates to a PUR foaming mold.

Background

The foaming forming mold is a plastic foaming mold, when in use, foaming resin is directly filled into the mold, is heated and melted to form gas-liquid saturated solution, a large number of micro bubble nuclei are formed through nucleation, the bubble nuclei are increased to form a foam plastic part, and the common foaming methods comprise three methods: physical foaming, chemical foaming and mechanical foaming. The mould comprises an upper mould and a lower mould which are both provided with streamline inner walls, so that the flow of the foaming material is facilitated. However, in the existing foam forming mold (as shown in fig. 1, the product cavity has an inverted structure according to the requirements of the product), after the upper mold and the lower mold are closed in the PUR forming process, redundant air in the foaming process cannot be effectively removed, especially air at the inverted structure, so that a foaming defect is generated, the appearance of the surface of the product cannot meet the requirements, and specifically, as shown in fig. 2, the inverted part cannot be smooth, the shape or the size does not meet the requirements, and a foaming defect part is generated.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a PUR foaming mould, which solves the problem of the defects of a PUR foaming surface, ensures that a PUR product is fully foamed, has complete surface appearance and does not have the phenomena of corner and material shortage, and meets the requirements.

The purpose of the utility model is realized by the following technical scheme:

the utility model provides a PUR foaming mold utensil, includes mould, mosaic block, lower mould and at least one link gear, it sets up the top at the lower mould to go up the mould, go up and be equipped with the product die cavity that is used for foaming between mould and the lower mould, the movably intracavity that is located the product die cavity of mosaic block, link gear is movably to be run through and to be gone up the mould and be connected with the mosaic block, go up and leave the side gas vent of the external and product die cavity of intercommunication between mould and the lower mould. When the PUR foaming machine works, although the linkage mechanism is closed, the linkage mechanism and the upper die cannot be completely tightly attached to each other without a wire gap, so that an exhaust channel is formed between the upper die and a product cavity through the arrangement of the linkage mechanism, air at a position where a defect is generated in the existing die can be exhausted from the newly-appeared exhaust channel, and the PUR is fully foamed.

The link gear includes gangbar and connector, it is equipped with a pore to go up vertical running through on the mould, the vertical No. two holes that are equipped with one end open-ended on the mosaic block, gangbar top-down passes a pore and stretches into No. two holes again, the connector is located the top of last mould.

The upper die comprises an upper cover and a connecting table arranged at the bottom of the upper cover, the mosaic block is positioned below the connecting table, and the linkage rod sequentially penetrates through the upper cover and the connecting table from top to bottom and is connected with the mosaic block.

The linkage rod stretches into tip in the mosaic piece and is equipped with down the external screw thread along circumference on the external surface, be equipped with on the inner wall in No. two holes with No. two internal threads of external screw thread looks adaptation down.

The linkage rod penetrates through the main body part of the upper die, an upper external thread is arranged on the outer surface along the circumferential direction, and a first internal thread matched with the upper external thread is arranged on the inner wall of the first hole channel. The linkage rod is in threaded connection with the first pore channel, so that more exhaust channels exist between the linkage rod and the upper die, and the exhaust effect is guaranteed.

The junction of gangbar and mosaic block is equipped with the sealing washer, can enter into No. two holes when avoiding PUR foaming, leads to gangbar and mosaic block to glue totally and can't separate, and the sealing washer can adopt common rubber seal in the industry.

The axial length of the linkage rod is larger than the total thickness of the upper die.

The junction of connector and link rod is equipped with the spacing pad of elasticity, avoids when down moving, and the connector can collide with last mould to the spacing pad of elasticity has also restricted the distance that link gear down moved, and the spacing pad of elasticity can adopt the material of rubber this type.

The linkage mechanism further comprises a shaft sleeve sleeved on the outer side of the linkage rod, a gap is formed between the shaft sleeve and the linkage rod, an air inlet is formed in the lower portion of the shaft sleeve, and an air outlet is formed in the upper portion of the shaft sleeve. The top end of the shaft sleeve and the linkage rod can be integrally formed, and air can enter a gap between the shaft sleeve and the linkage rod from the air inlet and then be discharged into the air from the air outlet through a gap between the connecting table and the mosaic block during PUR foaming.

The outer diameter of the connector is larger than that of the linkage rod and larger than that of the shaft sleeve, and the connector is prevented from extending into the first hole channel.

The air inlet is located above the mosaic block and arranged close to the upper surface of the mosaic block, so that the distance and the resistance of air entering the air inlet can be reduced.

The linkage mechanism further comprises an air cylinder, and the air cylinder is in transmission connection with the connector. The error of manual operation can be reduced through the cylinder, and the operation of the linkage mechanism can be accurately and automatically carried out.

Aiming at the PUR foaming piece shape, the inverted buckle structure or the inverted buckle structure is provided, in the earlier stage of die development and manufacturing, the die processing and manufacturing process is optimized, namely, a linkage mechanism (manual or pneumatic) is added on the original die, the splicing block in the die is in a floating state by adding the linkage mechanism, the PUR defect part of the product can be exhausted (the internal and external exhaust are communicated), after the die is closed, the internal redundant air can be exhausted to the outside, the finally obtained product can completely meet the appearance requirement, the PUR foaming surface defect problem is solved, the PUR product is fully foamed, the surface appearance is complete, the corner missing phenomenon is avoided, the requirement is met, the number of the linkage mechanisms and the position of the linkage mechanism in the upper die can be selected according to the actual situation, and the material of the linkage mechanism can also be selected according to the requirement of the die.

Drawings

FIG. 1 is a schematic structural view of a conventional PUR foaming mold;

FIG. 2 is a schematic structural view of a PUR product produced by using the PUR foaming mold of FIG. 1;

FIG. 3 is a schematic structural view of a PUR foaming mold of the present invention;

FIG. 4 is a schematic view showing the connection between the link mechanism and the mosaic blocks in embodiment 1;

fig. 5 is a schematic view showing the connection between the link mechanism and the mosaic blocks in embodiment 2.

In the figure: 1-upper mould; 101-upper cover; 102-a connection station; 2-mosaic blocks; 3, lower die; 4-product cavity; 5-side exhaust port; 6-a linkage rod; 7-a connector; 8-sealing ring; 9-an elastic limit pad; 10-shaft sleeve; 1001-air intake; 1002-air outlet; 11-a cylinder; 12-PUR product.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments.

Example 1

As shown in fig. 3 and 4, a PUR foaming mold, which comprises an upper mold 1, an insert 2, a lower mold 3 and at least one linkage mechanism, wherein the upper mold 1 is arranged above the lower mold 3, a product cavity 4 for foaming is arranged between the upper mold 1 and the lower mold 3, the upper mold 1 comprises an upper cover 101 and a connecting table 102 arranged at the bottom of the upper cover 101, at least one first hole (namely, the first hole integrally penetrates through the upper cover 101 and the connecting table 102) is vertically arranged on the upper mold 1 in a penetrating manner, the insert 2 is movably arranged in the product cavity 4 and is arranged below the connecting table 102, at least one second hole (with an opening facing the connecting table 102) with an opening at one end is vertically arranged on the insert 2, the first hole and the second hole which are used for inserting the same linkage mechanism are coaxially arranged, the linkage mechanism movably penetrates through the upper mold 1 and is connected with the insert 2, and a side exhaust port 5 (specifically arranged position and number of the side exhaust port 5) for communicating the outside with the product cavity 4 is reserved between the upper mold 1 and the lower mold 3 Also as the case may be). The number and the specific positions of the first pore channel, the second pore channel and the linkage mechanism are operated according to actual conditions, so that uniform and complete air exhaust is ensured.

As shown in fig. 4, the linkage mechanism works manually, and comprises a linkage rod 6 and a connector 7, an elastic limit pad 9 is arranged at the joint of the connector 7 and the linkage rod 6, the linkage rod 6 passes through a first hole from top to bottom and sequentially penetrates through an upper cover 101 and a connecting platform 102 and then extends into a second hole to be connected with an insert 2, a sealing ring 8 is arranged at the joint of the linkage rod 6 and the insert 2, the connector 7 is positioned above an upper die 1, a lower external thread is circumferentially arranged on the outer surface of the end part of the linkage rod 6 extending into the insert 2, a second internal thread adapted to the lower external thread is arranged on the inner wall of the second hole, an upper external thread is circumferentially arranged on the outer surface of the main body part of the linkage rod 6 penetrating through the upper die 1, a first internal thread adapted to the upper external thread is arranged on the inner wall of the first hole, the axial length of the linkage rod 6 is greater than the total thickness of the upper die 1, and when the linkage rod 6 moves downwards, enough space is reserved between the mosaic blocks 2 and the connecting table 102 for cleaning the PUR leftover materials and residual garbage, namely, the length of the linkage rod 6 which is exposed out of the mosaic blocks 2 and can freely move in the upper die is certainly longer than the total thickness of the upper die 1.

The linkage mechanism further comprises a shaft sleeve 10 sleeved on the outer side of the linkage rod 6, a gap is arranged between the shaft sleeve 10 and the linkage rod 6, a gas inlet 1001 is formed in the lower portion of the shaft sleeve 10, a gas outlet 1002 is formed in the upper portion of the shaft sleeve 10, the gas inlet 1001 is located above the mosaic block 2 and is arranged close to the upper surface of the mosaic block 2, the axial length of the shaft sleeve 10 is smaller than that of the linkage rod 6, the inner diameter of a second hole can be smaller than the outer diameter of the shaft sleeve 10, the shaft sleeve 10 can directly abut against the upper surface of the mosaic block 2, and the gas inlet 1001 can be provided by a gap between the shaft sleeve 10 and the upper surface of the mosaic block 2.

When the die works, a lower die 3 is fixed on a platform, a linkage mechanism is manually started, namely a linkage rod 6 is manually started, so that an insert block 2 moves towards the lower die 3, a space is reserved between the insert block 2 and a connecting table 102, residual garbage and PUR leftover materials on the lower surface of the connecting table 102, the upper surface of the insert block 2 and between the insert block and the connecting table are cleaned, after the cleaning is finished (the cleaning operation can be carried out after a PUR product is taken out after foaming is finished every time), the linkage rod 6 is moved upwards, so that the insert block 2 is in close contact with the connecting table 102, then the linkage mechanism is closed, foaming raw materials are injected for foaming, air at the edge can be discharged from a side air outlet 5 during foaming, air at the middle can enter a gap between the insert block 2 and the connecting table 102, and then the linkage rod 6 and a gap between a first pore passage (the air outlet passage is when the linkage mechanism does not comprise a shaft sleeve 10) or a gap between the shaft sleeve 10 and a first pore passage The gap and the gap between the shaft sleeve 10 and the linkage rod 6 (when the linkage mechanism comprises the shaft sleeve 10) are exhausted to the outside, so that the PUR foaming can be full, the data requirement is met, and other molding operations which are not specifically described can be carried out according to the existing operation steps.

Example 2

As shown in fig. 3 and 5, a PUR foaming mold comprises a cylinder 11 in addition to a linkage mechanism, the cylinder 11 is in transmission connection with the connecting head 7, and the operation is the same as that of the embodiment 1 except that the linkage mechanism is pneumatically started.

The embodiments described above are intended to facilitate the understanding and use of the utility model by those skilled in the art. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the above embodiments, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.

Claims

1. The utility model provides a PUR foaming mold, its characterized in that, includes mould (1), mosaic block (2), lower mould (3) and at least one link gear, it sets up the top at lower mould (3) to go up mould (1), it is equipped with product die cavity (4) that are used for the foaming to go up between mould (1) and lower mould (3), mosaic block (2) movably is located product die cavity (4), link gear movably runs through mould (1) and is connected with mosaic block (2), go up side gas vent (5) that leave the external world of intercommunication and product die cavity (4) between mould (1) and lower mould (3).

2. A PUR foaming mould according to claim 1, wherein the linkage mechanism comprises a linkage rod (6) and a connector (7), a first hole is vertically arranged on the upper mould (1) in a penetrating manner, a second hole with an open end is vertically arranged on the mosaic block (2), the linkage rod (6) passes through the first hole from top to bottom and then extends into the second hole, and the connector (7) is positioned above the upper mould (1).

3. A PUR foaming mold according to claim 2, wherein the upper mold (1) comprises an upper cover (101) and a connecting table (102) arranged at the bottom of the upper cover (101), the mosaic block (2) is arranged below the connecting table (102), and the linkage rod (6) sequentially penetrates through the upper cover (101) and the connecting table (102) from top to bottom and is connected with the mosaic block (2).

4. A PUR foaming mold according to claim 2, wherein the end of the linkage rod (6) extending into the mosaic block (2) is provided with a lower external thread on the outer surface along the circumferential direction, and the inner wall of the second hole is provided with a second internal thread matched with the lower external thread.

5. A PUR foaming mould according to claim 2, wherein the linkage rod (6) penetrates through the main body part of the upper mould (1) and is provided with an upper external thread on the outer surface along the circumferential direction, and the inner wall of the first hole channel is provided with a first internal thread matched with the upper external thread.

6. A PUR foaming mould according to claim 2, wherein the joint between the linkage rod (6) and the mosaic block (2) is provided with a sealing ring (8).

7. A PUR foaming mould according to claim 2, wherein the joint of the connecting head (7) and the linkage rod (6) is provided with an elastic limit pad (9).

8. A PUR foaming mold according to claim 2, wherein the linkage mechanism further comprises a shaft sleeve (10) sleeved outside the linkage rod (6), a gap is provided between the shaft sleeve (10) and the linkage rod (6), an air inlet (1001) is provided at the lower part of the shaft sleeve (10), and an air outlet (1002) is provided at the upper part of the shaft sleeve (10).

9. A PUR foaming mould according to claim 8, wherein the gas inlet (1001) is located above the mosaic block (2) and is located adjacent to the upper surface of the mosaic block (2).

10. A PUR foaming mould according to claim 2 wherein the linkage further comprises a cylinder (11), the cylinder (11) being in driving connection with the connecting head (7).