CN217395606U

CN217395606U - Injection mold of thermal expansion self-adaptive ejection mechanism

Info

Publication number: CN217395606U
Application number: CN202220312656.7U
Authority: CN
Inventors: 吴强; 程晨; 吴晨飞
Original assignee: Shenzhen Taidelong Electronic Technology Co ltd
Current assignee: Shenzhen Taidelong Electronic Technology Co ltd
Priority date: 2022-02-16
Filing date: 2022-02-16
Publication date: 2022-09-09
Anticipated expiration: 2032-02-16

Abstract

The utility model provides a thermal energy self-adaptation ejection mechanism's injection mold relates to injection mold technical field, the lower extreme fixed mounting of spliced pole has the base, the upper end partly position in the inside of through-hole of ejector pin, the inside of through-hole is provided with the apron subassembly, the apron subassembly includes apron and second spring, the upper end of second spring is connected with the lower fixed surface of apron, the lower surface of apron supports tightly with the diapire of recess, the inside in cover half is seted up to the die cavity. The utility model discloses because of there is certain distance between ejector pin and the apron, there is corresponding space in ejector pin and the hot plate middle part simultaneously, has reduced the area of contact, makes its rebound through promoting the ejector pin, can promote the apron rebound after the ejector pin removes, and the apron removes can mould a jack-up to the inside shaping of die cavity, accomplishes the process of drawing of patterns, and the ejector pin can not receive the effect of thermal expansion like this, and then can avoid leading to the fact the extrusion damage to the inside piece product of moulding of die cavity.

Description

Injection mold of thermal expansion self-adaptive ejection mechanism

Technical Field

The utility model relates to an injection mold technical field particularly, relates to thermal energy self-adaptation ejection mechanism's injection mold.

Background

The injection mold is a tool for producing plastic products, and particularly, raw materials in a molten state are injected into a cavity of the injection mold under high pressure, and the raw materials are ejected out by an ejection mechanism after being solidified to obtain the plastic products. The injection mold is divided into a thermoplastic injection mold and a thermosetting injection mold according to the molding characteristics, and in the process of producing an injection product by adopting the thermosetting injection mold, the raw material injected into the cavity needs to be heated so as to be cured and further obtain the injection product. Therefore, a heating device is required in the thermosetting injection mold.

However, in the heating and curing process of most of the existing molds, because the contact area of the ejector rod and the heating device is large, and the top of the ejector rod extends into the cavity, most of the ejector rods are usually in a heating state, and the other part of the ejector rod is in a heat insulation state, under the thermal expansion effect, the height of the ejector rod is changed to a certain extent, so that the products are seriously extruded, the structural size of the products is further influenced, and for the products with higher precision requirements, the reject ratio of the products is greatly increased, and certain influence is brought to the products; we therefore propose an injection mould with a thermal expansion adaptive ejection mechanism to solve the problems encountered in the above.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides thermal energy self-adaptation ejection mechanism's injection mold can effectively solve the problem among the background art.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

thermal energy self-adaptation ejection mechanism's injection mold, including the movable mould, two the one end of movable mould is supported tightly each other, the lower surface sliding connection cover half of movable mould, the lower fixed surface of cover half installs the heat-conducting plate, the lower extreme fixed mounting of heat-conducting plate has the hot plate, the lower surface four corners fixed mounting spliced pole of hot plate, the lower extreme fixed mounting of spliced pole has the base, the middle part of base has passed the ejector pin, the upper end part of ejector pin is located the inside of through-hole, the inside of through-hole is provided with the apron subassembly, the apron subassembly includes apron and second spring, the upper end of second spring and the lower fixed surface of apron are connected, the lower surface of apron supports tightly with the diapire of recess, the inside in die cavity is seted up to the recess, the inside in the cover half is seted up to the die cavity.

Preferably, a material injection hole is formed in one of the movable dies, and support columns are fixedly mounted at four corners of the lower surface of the base.

Preferably, one end of the ejector rod, which is close to the base, is fixedly provided with a first round block, and the upper surface of the first round block is fixedly provided with a first spring.

Preferably, a support frame is fixedly mounted on the upper surface of the first circular block, and the upper end of the support frame is fixedly connected with the lower surface of the heating plate.

Preferably, the upper end of the first spring is fixedly connected with the lower surface of the second circular block, and the middle part of the second circular block is fixedly connected with the ejector rod.

Preferably, the ejector rod penetrates through the heat conducting plate and the heating plate, the upper end of the ejector rod is located below the cover plate, a through hole is formed in the groove, a sliding groove is formed in the through hole, a sliding block is slidably mounted in the groove, one end of the sliding block is fixedly connected with the connecting rod, the upper end of the connecting rod is fixedly connected with the lower surface of the cover plate, the circular hole is formed in the groove, and the bottom wall of the circular hole is fixedly connected with the second spring.

Compared with the prior art, the utility model discloses following beneficial effect has:

the utility model discloses, because of there is certain distance between ejector pin and apron and the die cavity, there is corresponding space in ejector pin and the hot plate middle part simultaneously, reduced the area of contact, make its rebound through promoting the ejector pin, can promote the apron rebound after the ejector pin removes, the apron removes can mould a jack-up to the inside shaping of die cavity, accomplishes the process of drawing of patterns, and the ejector pin can not receive the effect of thermal expansion like this, and then can avoid leading to the fact the extrusion damage to the inside piece product of moulding of die cavity.

Drawings

Fig. 1 is a schematic view of the overall structure of an injection mold of the thermal expansion adaptive ejection mechanism of the present invention;

fig. 2 is a schematic view of the internal structure of the injection mold of the thermal expansion adaptive ejection mechanism of the present invention;

fig. 3 is an enlarged schematic structural view of a portion a of the injection mold of the thermal expansion adaptive ejection mechanism of the present invention;

fig. 4 is a schematic structural diagram of the cover plate assembly of the injection mold of the thermal expansion adaptive ejection mechanism of the present invention.

In the figure: 1. moving the mold; 2. fixing a mold; 3. a heat conducting plate; 4. heating plates; 5. connecting columns; 6. a base; 7. a support pillar; 8. a cover plate assembly; 801. a cover plate; 802. a second spring; 803. a connecting rod; 804. a slider; 9. a cavity; 10. a support frame; 11. a first circular block; 12. a top rod; 13. a first spring; 14. a second circular block; 15. a through hole; 16. a chute; 17. a circular hole; 18. and (4) a groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

As shown in fig. 1 to 4, the injection mold of the thermal expansion self-adaptive ejection mechanism, including the movable mold 1, the one end of two movable molds 1 supports each other tightly, the lower surface sliding connection cover half 2 of the movable mold 1, the lower surface fixed mounting of the cover half 2 has the heat-conducting plate 3, the lower extreme fixed mounting of the heat-conducting plate 3 has the heating plate 4, the lower surface four corners fixed mounting spliced pole 5 of the heating plate 4, the lower extreme fixed mounting of the spliced pole 5 has the base 6, the ejector rod 12 has been passed at the middle part of the base 6, a part of the upper end of the ejector rod 12 is located inside the through hole 15, the inside of the through hole 15 is provided with the cover plate assembly 8, the cover plate assembly 8 includes the cover plate 801 and the second spring 802, the upper end of the second spring 802 is connected with the lower surface fixed connection of the cover plate 801, the lower surface of the cover plate 801 supports tightly with the bottom wall of the groove 18, the groove 18 is opened inside of the die cavity 9, the inside of the die cavity 2 is opened.

More specifically, the inside of one of the movable moulds 1 is provided with a material injection hole, and four corners of the lower surface of the base 6 are fixedly provided with support columns 7. One end of the mandril 12 close to the base 6 is fixedly provided with a first round block 11, and the upper surface of the first round block 11 is fixedly provided with a first spring 13. The upper surface of the first round block 11 is fixedly provided with a support frame 10, and the upper end of the support frame 10 is fixedly connected with the lower surface of the heating plate 4. The upper end of the first spring 13 is fixedly connected with the lower surface of the second round block 14, and the middle part of the second round block 14 is fixedly connected with the mandril 12.

It should be noted that, after slurry is injected into the inside of the cavity 9 for cooling and molding through the injection hole on one of the movable dies 1, the ejector rod 12 is pushed to move upwards, the cover plate 801 is pushed to move upwards after the ejector rod 12 moves, the cover plate 801 moves to jack up a molded plastic part inside the cavity, and a demolding process is completed, and it should be noted that the ejector rod 12 drives the first circular block 11 to move when being pushed, and then generates a reaction force by compressing the first spring 13, so that after the ejector rod 12 is loosened, the first spring 13 can return the ejector rod 12, the model of the heating plate 4 can be selected and matched according to the actual use environment by adopting the prior art, and meanwhile, the two ends of the two movable dies 1 can be connected with external hydraulic rods, and a moving effect is achieved.

More specifically, the top rod 12 penetrates through the heat conducting plate 3 and the heating plate 4, the upper end of the top rod 12 is located below the cover plate 801, a through hole 15 is formed in the groove 18, a sliding groove 16 is further formed in the through hole 15, a sliding block 804 is slidably mounted in the groove 18, one end of the sliding block 804 is fixedly connected with the connecting rod 803, the upper end of the connecting rod 803 is fixedly connected with the lower surface of the cover plate 801, the circular hole 17 is formed in the groove 18, and the bottom wall of the circular hole 17 is fixedly connected with the second spring 802.

It should be noted that, when the cover plate 801 moves, the second spring 802 is pulled, so that the second spring 802 generates a reaction force, and when the ejector rod 12 moves down or the cover plate 801 is no longer pushed, the second spring 802 pulls the cover plate 801 to return, because a certain distance exists between the ejector rod 12 and the cover plate 801, and a corresponding distance exists between the ejector rod 12 and the middle of the heating plate 4, the contact area is reduced, so that the ejector rod does not suffer from a thermal expansion effect, and further, damage to a plastic product inside a cavity can be avoided.

The working principle of the injection mold of the thermal expansion self-adaptive ejection mechanism is as follows:

firstly, in the using process, after slurry is injected into the inside of a cavity 9 for cooling and forming through an injection molding hole on one of the movable dies 1, the ejector rod 12 is pushed to move upwards, the cover plate 801 is pushed to move upwards after the ejector rod 12 moves, the cover plate 801 moves to jack up a formed plastic part in the cavity, the demolding process is completed, meanwhile, the second spring 802 is pulled when the cover plate 801 moves, the second spring 802 generates a reaction force, when the ejector rod 12 moves downwards or the cover plate 801 is not pushed any more, the second spring 802 pulls the cover plate 801 to return, a certain distance exists between the ejector rod 12 and the cover plate 801, meanwhile, a corresponding space exists between the ejector rod 12 and the middle part of the heating plate 4, the contact area is reduced, and therefore, the ejector rod cannot be subjected to a thermal expansion effect, and further, damage to a plastic part product in the cavity can be avoided.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Thermal energy self-adaptation ejection mechanism's injection mold, including movable mould (1), its characterized in that: two the one end of movable mould (1) supports tightly each other, the lower surface sliding connection cover half (2) of movable mould (1), the lower fixed surface of cover half (2) installs heat-conducting plate (3), the lower extreme fixed mounting of heat-conducting plate (3) has heating plate (4), the lower surface four corners fixed mounting spliced pole (5) of heating plate (4), the lower extreme fixed mounting of spliced pole (5) has base (6), ejector pin (12) have been passed at the middle part of base (6), the upper end partly of ejector pin (12) is located the inside of through-hole (15), the inside of through-hole (15) is provided with apron subassembly (8), apron subassembly (8) are including apron (801) and second spring (802), the upper end of second spring (802) is connected with the lower fixed surface of apron (801), the lower surface of apron (801) supports tightly with the diapire of recess (18), the groove (18) is arranged in the cavity (9), and the cavity (9) is arranged in the fixed die (2).

2. The injection mold of a thermal expansion adaptive ejection mechanism according to claim 1, wherein: the material injection hole is formed in the movable die (1), and support columns (7) are fixedly mounted at four corners of the lower surface of the base (6).

3. The injection mold of a thermal expansion adaptive ejection mechanism according to claim 1, wherein: one end of the ejector rod (12) close to the base (6) is fixedly provided with a first round block (11), and the upper surface of the first round block (11) is fixedly provided with a first spring (13).

4. The injection mold of a thermal expansion adaptive ejection mechanism according to claim 3, wherein: the upper surface fixed mounting of first circular block (11) has support frame (10), the upper end of support frame (10) and the lower fixed surface of hot plate (4) are connected.

5. The injection mold of a thermal expansion adaptive ejection mechanism according to claim 3, wherein: the upper end of the first spring (13) is fixedly connected with the lower surface of the second circular block (14), and the middle part of the second circular block (14) is fixedly connected with the ejector rod (12).

6. The injection mold of a thermal expansion adaptive ejection mechanism according to claim 1, wherein: conducting plate (3) and hot plate (4) are passed in ejector pin (12), the upper end of ejector pin (12) is located the below of apron (801), through-hole (15) have been seted up to the inside of recess (18), spout (16) have still been seted up to the inside of through-hole (15), inside slidable mounting slider (804) of recess (18), the one end and connecting rod (803) fixed connection of slider (804), the lower fixed surface of the upper end and apron (801) of connecting rod (803), the inside in recess (18) is seted up to circular port (17), the diapire and second spring (802) fixed connection of circular port (17).