TWM492242U - Improved structure for forming mold - Google Patents

Description

Molding die improved structure

The present invention relates to a technical field of the structure of a molding die for a blow molding machine, in particular, a blow molding type can be demolded immediately without waiting for a complete temperature drop, and is not easily smeared when demolded. In the case of the mold, it is possible to achieve a molded mold improved structure that is quickly demolded to improve production efficiency.

Referring to FIG. 1 , a molding die of a conventional blow molding machine is formed by placing a sheet-shaped molded plastic material 10 on the sealing flange 12 of the lower mold 11 during the molding process. The mold cavity 13 is covered, and then the upper mold 14 is moved downward to apply a considerable pressure to the molded plastic material 10. Thereafter, the lower mold 11 and the upper mold are used by the heater 16 and the upper heater 17 under the heating device 15. 14 is heated to a suitable temperature for easily deforming the molded plastic material 10, and then the high pressure gas is supplied from the gas pipe 18 of the upper mold 14 to the sealing chamber 19 to press the molded plastic material from the top to the bottom by the pressure of the high pressure gas. 10 is blown into the cavity 13 and further shaped along the shape of the cavity 13, and then the upper die 14 is moved up. After the molded plastic 10 is cooled, it can be taken out from the cavity 13 and finally removed. Then cut off the excess and get the finished product.

However, in order to have a good sealing effect during molding, the upper mold 14 and the lower mold 11 need to have a relatively high clamping pressure between the molded plastics 10 therebetween. In addition, in order to make the molded plastic material 10 easy to be blow-molded, it is necessary to use the heating device 15 to heat the upper and lower molds 14, 11 to a temperature suitable for shaping, and thus, during the blow molding process. The molded plastic material 10 is partially melted and penetrated into the capillary pores of the sealing flange 12 of the lower mold 11 by the high temperature and the strong clamping of the upper and lower molds 14, 11 to form a hot melt adhesive. This will cause problems that are not easily demolded. In addition, since the molded plastic material 10 has a relatively high temperature and is easily deformed when it is formed, it is necessary to wait until it is completely cooled and hardened before the demolding action can be performed, and thus it takes a lot of time to wait for cooling. . Therefore, it is very time-consuming and labor-intensive in demolding, which affects the overall production efficiency.

The conventional molding die has a large amount of time after the product is formed, waiting for its complete cooling and cooling to be demolded, and the product is easily melted and adhered to the sealing flange of the lower mold after molding, so that the film is not easy to be removed. A number of problems that affect the speed of demolding and thus reduce production efficiency.

The present invention provides a modified mold forming structure including a lower mold, an isolation washer and an upper mold. Wherein, the top surface of the lower mold has a sealing flange protruding in a ring shape and a cavity located inside the sealing flange. The isolating gasket is looped and has a higher melting point than a molded plastic. The spacer is detachably coupled to the top surface of the sealing flange such that a top surface of the spacer gasket is raised above a top surface of the sealing flange for receiving the sheet-shaped molded plastic. The upper mold is movably pressed against the top surface of the molded plastic material relative to the lower mold. The upper mold has a gas supply pipe disposed on the bottom surface and corresponding to one of the cavity sealing chambers and communicating with the sealing cavity, the gas pipe connection To a high pressure gas generating device.

The molding die improved structure provided by the present invention, after the molded plastic material is sealed and heated by the upper and lower molds, the high pressure gas is sent through the gas pipe to the sealing cavity through the high pressure gas generating device to After the blow molding, the molded plastic material can be separated from the lower mold by the isolation of the insulating gasket, and only the hot melt adheres to the insulating gasket, and The melting point is higher than the molded plastic material, so the insulating gasket is not melted and adhered to the lower mold due to the molding temperature, so that the molded plastic material and the insulating gasket after molding can be easily separated from the lower mold. Therefore, it has the effect of being easily demolded. In particular, after the molded plastic material is molded, the insulating gasket can be adhered by hot melt to further increase the overall structural strength, so that the mold can be released immediately without waiting for the temperature to be completely lowered without deformation. The situation. Therefore, the creation system has the effect of rapid demolding and greatly improving production efficiency.

[Prior technology]

10‧‧‧Formed plastic

11‧‧‧下模

12‧‧‧ Sealing flange

13‧‧‧ cavity

14‧‧‧上模

15‧‧‧ heating device

16‧‧‧ Lower heater

17‧‧‧Up heater

18‧‧‧ gas pipeline

19‧‧‧ Sealing chamber

[This creation]

20‧‧‧Down

21‧‧‧ Sealing flange

22‧‧‧Move

23‧‧‧ Positioning groove

30‧‧‧Isolation gasket

40‧‧‧上模

41‧‧‧ sealed cavity

42‧‧‧ gas pipeline

50‧‧‧ heating device

51‧‧‧ Lower heater

52‧‧‧Upper heater

60‧‧‧Formed plastic

Fig. 1 is a schematic view showing the molding operation of a conventional molding die.

Figure 2 is a three-dimensional exploded view of the creation.

Figure 3 is an enlarged schematic view of the section of the creation.

Figure 4 is a schematic diagram of the action when the creation is filled.

Fig. 5 is a schematic view of the operation of the present mold clamping and blow molding.

Figure 6 is a schematic diagram of the action when the creation is demolded.

Figure 7 is a three-dimensional diagram of the creation after demolding.

Referring to Figures 2 and 3, the modified mold structure shown in the present application includes a lower mold 20, an isolation gasket 30, an upper mold 40, and a heating device 50. among them:

The top surface of the lower mold 20 has a ring-shaped sealing flange 21 and a cavity 22 located inside the sealing flange 21. The top surface of the sealing flange 21 has a loop shape. One of the positioning grooves 23 is provided.

The spacer gasket 30 has a loop shape and a higher melting point than a molded plastic material 60. For example, when the molded plastic material 60 is made of aluminum, the spacer gasket 30 may be made of stainless steel or copper; when the molded plastic material 60 is rubber or plastic, the spacer gasket 30 may be made of aluminum. The lower portion of the spacer gasket 30 is detachably embedded in the positioning groove 23 of the top surface of the sealing flange 21, and the spacer gasket 30 is disposed when the spacer gasket 30 is embedded in the positioning groove 23. The top surface is raised above the top surface of the sealing flange 21 so that it can be used to receive the formed plastic sheet 60 in the form of a sheet.

The upper die 40 is movable relative to the lower die 20 such that it can be pressed against the top surface of the molded plastic 60 placed on the spacer gasket 30. The upper mold 40 has a gas supply pipe 42 disposed on the bottom surface and corresponding to one of the cavity 22 and the sealed cavity 41. The gas pipe 42 is connected to one of the external high pressure gas generating devices (in the figure) Not shown), the high pressure gas generating device supplies high pressure gas to the gas delivery pipe 42.

The heating device 50 includes a lower heater 51 and an upper heater 52. The lower heater 51 is disposed on a bottom surface of the lower mold 20, and the upper heater 52 is disposed thereon. The top surface of the mold 40 can be heated to the lower mold 20 and the upper mold 40, respectively, so as to have a predetermined operating temperature for forming the molding material 60 sandwiched between the upper and lower molds 40, 20. It can be easily shaped by the high temperature.

Referring to Figures 4-7, it is pointed out that when the forming process is performed, the spacer gasket 30 is first embedded in the positioning groove 23, and then the sheet-shaped molded plastic material 60 is formed. The top surface of the insulating gasket 30 is placed on the top surface of the insulating gasket 30, and then the upper mold 40 is moved downward and a considerable pressure is applied to the molded plastic material 60, followed by heating under the heating device 50. The upper mold 20 and the upper mold 40 heat the lower mold 20 and the upper mold 40 to a temperature at which the molded plastic material 60 is easily shaped, and then the high pressure gas is supplied from the gas supply pipe 42 of the upper mold 40 to the sealed chamber 41 to The molded plastic material 60 is blown into the cavity 22 from the top and bottom by the pressure of the high pressure gas, and is formed along the shape of the cavity 22, and then the upper mold 40 is moved up. The formed molded plastic material 60 is taken out from the lower mold 20 together with the insulating gasket 30 to which the hot melt is adhered, and finally the excess portion such as the insulating gasket 30 is adhered to the molded plastic material 60. Remove to get the finished product.

In the present invention, an anti-adhesion layer (not shown) may be plated on the surface of the cavity 22 of the lower mold 20, and the anti-adhesive property of the anti-adhesion layer may be matched with the cavity 22 The pattern and pattern in the shape of the molded plastic material 60 can thus form a finer and finer pattern or pattern.

The molded mold improved structure provided by the present invention, when the molded plastic material 60 is nip-sealed by the upper and lower molds 40, 20 and heated by the heating device 50, the high-pressure gas is transmitted through the high-pressure gas generating device through the high-pressure gas generating device. The air tube 42 is fed into the seal After the cavity 41 is blow molded, the molded plastic 60 can be separated from the lower mold 20 by the isolation of the insulating gasket 30, and only the hot melt adheres to the insulating gasket. 30, on the consumable, and since the melting point of the spacer gasket 30 is higher than the molding material 60, the high temperature generated by the heating device 50 is insufficient for the separator 30 to be thermally fused to the lower mold 20, so The formed molded plastic material 60 and the insulating gasket 30 can be easily separated from the lower mold 20, and thus have an effect of being easily released from the mold. In particular, after the molding of the molded plastic material 60, the ring-shaped insulating gasket 30 can be adhered by hot melt to further increase the overall structural strength thereof, so that it can be performed immediately without waiting for the temperature to be completely lowered. Demoulding, and there will still be no deformation. Therefore, the creation system has the effect of rapid demolding and greatly improving production efficiency.

20‧‧‧Down

21‧‧‧ Sealing flange

22‧‧‧Move

23‧‧‧ Positioning groove

30‧‧‧Isolation gasket

40‧‧‧上模

41‧‧‧ sealed cavity

42‧‧‧ gas pipeline

50‧‧‧ heating device

51‧‧‧ Lower heater

52‧‧‧Upper heater

60‧‧‧Formed plastic

Claims (8)

The improved structure of the forming mold comprises: a lower mold having a sealing flange protruding in a ring shape and a cavity on the inner side of the sealing flange; an insulating gasket having a ring shape and a melting point Above the molded plastic, the isolating gasket is detachably coupled to the top surface of the sealing flange such that the top surface of the insulating gasket is higher than the top surface of the sealing flange for receiving the sheet a molding material; and an upper mold movably pressed against the top surface of the molding material relative to the lower mold, the upper mold having a sealing chamber disposed on the bottom surface and corresponding to the cavity and the sealing The cavity communicates with a gas pipe connected to a high pressure gas generating device. The molding die improvement structure of claim 1, further comprising a heating device for heating the upper die and the lower die to have a predetermined operating temperature. The molding die improved structure according to claim 2, wherein the heating device comprises a lower heater and an upper heater, wherein the lower heater is disposed on a bottom surface of the lower mold, and the upper heater is disposed on a top surface of the upper mold . The molding die improved structure according to claim 1 or 2, wherein the mold cavity of the lower mold is further coated with an anti-adhesion layer. The molding die improved structure according to claim 1 or 2, wherein a top surface of the sealing flange has a ring-shaped positioning groove, and a lower portion of the insulating gasket is embedded in the positioning groove. A molding die improvement structure according to claim 1 or 2, wherein the spacer gasket The material can be aluminum. The molding die improved structure according to claim 1 or 2, wherein the spacer gasket is made of stainless steel. The molding die improved structure according to claim 1 or 2, wherein the spacer gasket is made of copper.