TWI678271B - Material injection structure of polymer article forming mold - Google Patents

Abstract

The injection structure of the polymer article forming mold provided by the present invention includes a first mold portion and a second mold portion spaced apart from each other, and a gap between the first mold portion and the second mold portion. The third mold part, and the position of supplying the external raw material is located on one side of the first mold part away from the second mold part, further, to supply the external raw material to the second mold part and the third mold part In the mold room, the present invention makes the injection structure further include a channel that is continuously provided on the first mold part. Through the channel, external raw materials can be directly provided from the supply position to the third mold portion. The flow path on the mold part is injected into the mold room, and it is not necessary to make external materials flow through the first mold part and the third mold part in order to enter the mold room, as is known in the art. To achieve the purpose of the invention.

Description

Material injection structure of polymer article forming mold

The invention relates to a polymer molding process technology, and particularly relates to a material injection structure of a polymer article molding mold.

The mold used in the polymer molding process technology is to form a mold chamber space inside the mold, so that the polymer raw material is molded in the mold chamber to form a specific shape of the article, and among them, the polymer The raw materials are filled in the mold chamber. The conventional technology has revealed different feeding technologies such as mold opening filler and mold injection. The former will open the mold to open the mold chamber, so that the polymer raw materials can be directly placed in the open mold chamber. In the mold chamber, the latter is to close the mold. When the mold chamber is closed, the flow path for the polymer material in the hot molten state is formed by the flow channel preset on the mold, so that the polymer material can be used. The outside of the mold flows into the closed mold chamber space through the injection channel to be molded by the molder.

In the technical field of mold injection, in order to obtain the shortest flow path, the position of the flow path is changed according to the different feeding devices. For example, when feeding from the horizontal direction, the flow path of the mold is usually roughly The upper part extends along the horizontal direction. The specifics are as disclosed in the pre-patent case of China's No. M291891. In contrast, when feeding from the direction of gravity, the flow path of the mold is generally from top to bottom. Extending in the direction of gravity, this was also disclosed in China's pre-patent case No. M485818.

In a multilayer mold similar to that disclosed in Chinese Patent No. M485818, where a plurality of molds are overlapped with each other, usually a mold chamber of an appropriate shape is defined between adjacent molds. Therefore, the raw materials supplied above In the past, it has flowed down to the bottom of the mold chamber space. The conventional technology is to set perforations on each mold, and make the perforations on each mold coaxially aligned with other preset perforations when the mold is closed. The tandem becomes the flow path for the raw material flow to flow down into the space of the mold chamber. Although the technology has been widely used in polymer molding processing technology, the single flow path is divided into In addition to the difficulty in processing on different molds, it is difficult to ensure the tight state between the butt perforations when the different molds are overlapped, so it is easy to produce the seepage of the raw materials. It is obvious that the conventional technology has not yet been perfected.

Therefore, the main object of the present invention is to provide a injection structure of a polymer article forming mold, which can prevent the polymer material from seepage at the interface portion where the constituent sheets of the multilayer mold overlap each other.

The reason is that in order to achieve the above object, the injection structure of the polymer article forming mold provided by the present invention includes a first mold portion and a second mold portion spaced apart from each other, and a first mold portion interposed therebetween. A third mold part between the second mold part and the second mold part, and the position of supplying the external raw material is located on a side of the first mold part away from the second mold part, and further, in order to supply the external raw material to the second mold part In the mold room between the mold part and the third mold part, the present invention makes the injection structure further include a channel that is continuously provided on the first mold part. Through the channel, external raw materials can be removed from the supply position. Is injected directly into the mold chamber through a flow channel provided on the third mold section, and it is not necessary to sequentially pass external raw materials through the first mold section and the third mold section as in conventional techniques. Those who have access to the mold chamber can achieve the purpose of the invention.

The channel is used as a channel to allow the feeding mechanism of the external raw material to penetrate, and from the supply position, the external raw material is supplied to the third die through the ground diameter of the first die, and the third die is also allowed. A first part of itself penetrates into the channel, and an end of the first part approaches the supply position.

In the technical means of passing the first part through the channel, the third mold part further includes a first-rate channel, and the flow channel forms an inlet at one end of the first portion, so that external raw materials can pass through the inlet. Into the runner.

As far as the composition of the first part is concerned, the third mold part further includes a third mold body and a first convex body as the first part, and the first convex body is protruded from the third mold body to face each other. On one side of the first mold part, and the inlet of the flow channel is located on one end of the first convex body away from the third mold body.

In addition, as for the technology for guiding the flowing external raw material to the mold chamber, in addition to the external raw material being guided from the supply position to the first convex body through the above-mentioned flow path, the flow path is further positioned in the An outlet is formed on the second portion of one of the third mold portions, so that external raw materials can flow out of the third mold portion from the outlet and enter the mold chamber.

Wherein, the second part is composed of a second convex body, and the second convex system protrudes from a side of the third mold body opposite to the second mold part.

The number of mold chambers between the second mold part and the third mold part may be a majority, and the second mold part further includes a second mold body and an accommodation space, and the accommodation space is recessed. The second mold body is opposite to one side of the third mold part and is interposed between the mold chambers for receiving the second convex body.

Wherein, the second mold part has a plurality of runners, which respectively connect the accommodating space and the mold chambers, and the runners on the second convex body form the same number of outlets as the runners. And communicate with the runners separately, so that the external raw materials in the runner can be distributed to each of the mold chambers.

Please refer to the first diagram to the third diagram. The injection structure (10) of the polymer article forming mold provided in a preferred embodiment of the present invention mainly includes a first mold portion (20 ), A second mold section (30), a third mold section (40), two mold chambers (50) at the proximal end, two mold chambers (60) at the far end, a channel (70), and two runners (80).

Firstly, a person skilled in the art, which is a multi-layer mold sheet stacked on top of each other and forming a mold chamber therebetween, is explained firstly, that is, the first mold part (20) has two plate-shaped first molds pivoted to each other. Body (21); the second mold part (30) has a plate-shaped second mold body (31) of an appropriate thickness, and is located below the first mold part (20); the third mold part (40) A plate-shaped third mold body (41) having an appropriate thickness is interposed between the first mold portion (20) and the second mold portion (30); the proximal mold chambers (50) are Between the first mold body (21) and the third mold body (41); the distal mold rooms (60) are between the third mold body (41) and the second mold body ( 31).

In addition to the prior art, the technical features of this embodiment are that the channel (70) is arranged on the first mold bodies (21), so as to be located above the first mold parts (20). The space's external raw material supply mechanism (not shown in the figure) can supply external raw materials to the third mold part (40) through the channel (70), and then be guided to the remote mold rooms ( In step 60), the filling process of the remote mold chambers (60) does not require external materials to flow through the first mold section (20).

More specifically, in addition to the third mold body (41), the third mold part (40) also includes a first convex body (42) in a push shape, which is protruded from the third mold body ( 41) Opposite to the upper end surface of the first mold part (20), the volume and size are restricted so as not to affect the insertion of the first convex body (42) into the channel (70), and the second convex body is a block. (43) is protruded on the end surface of the third die body (41) opposite to the lower die body (31).

The second mold part (30) further includes an accommodating space (32), which is recessed on the end surface of the second mold body (31) opposite to the third mold body (41), and communicates with the first mold body (31). The two convex bodies (43) are complementary in shape, and most of the runners (33) are respectively connected to the distal mold chambers (60) and the receiving space (32).

The flow channels (80) are disposed in the third die portion (40), and an inflow port (801) is formed at the top end surface of the first convex body (42), and the second convex body (80) 43) forms two outlets (802) on the side.

The injection structure (10) of the polymer article forming mold composed of the above components, in use, the first mold portion (20), the third mold portion (40), and the second mold portion are first used. (30) Overlap each other in order from top to bottom to form a mold clamping state, so that the proximal and distal mold chambers (50) and (60) can be formed between adjacent mold bodies and closed and sealed. State, and as shown in the fourth figure, while the mold is being closed, the first convex body (42) is inserted upward into the channel (70) in the first mold part (20), and the top end surface is It is located on the same plane as the top end surface of the first mold part (20), and the second convex body (43) is inserted downward into the accommodation space (32) of the second mold part (30), and the The outlets (802) are in communication with the corresponding runners (33).

Thereby, the external raw material supply mechanism (not shown in the figure) such as the nozzle of the injection machine can send external raw materials into the flow channel (80) through the inlet (801) of the flow channels (80). And through the flow path formed by the runner (80), the external raw materials are distributed to the runners (33) through the outlets (802), and then enter the remote mold chambers (60) ) To complete the filling process of the remote mold chambers (60). At the same time, other feeding mechanisms can also inject external raw materials through the runner (22) on the first mold section (20). In the proximal mold chambers (50), the filling of the mold chambers (50) (60) is completed respectively.

After the raw materials are respectively molded into the embryos in the mold chambers (50) (60), the mold can be opened to remove the third mold part (40), and then the first mold part (20) As shown in the fifth figure, the second mold part (30) is overlapped with each other and the molds are closed again, and the primary embryos separately molded are then combined and formed.

In summary, the injection structure (10) of the polymer article forming mold reduces the parting line that the polymer material needs to flow when the polymer material flows through the channel (70), so as to reduce the seepage of the material from different positions of the mold body interface It is possible that, in addition to reducing the amount of waste, through the technology of temperature control of the removed third mold part (40), the raw materials located in the flow channel (80) can be maintained in a usable uncooled state. It is conducive to the subsequent injection process.

(10) ‧‧‧Injection structure of polymer article mould

(20) ‧‧‧The first mold department

(21) ‧‧‧First Body

(22) ‧‧‧Sprue

(30) ‧‧‧Second Mould

(31) ‧‧‧Second Mould

(32) ‧‧‧Accommodation space

(33) ‧‧‧Sprue

(40) ‧‧‧The third mold

(41) ‧‧‧Third Body Form

(42) ‧‧‧The first convex body

(43) ‧‧‧Second Convex

(50) ‧‧‧Proximity mold room

(60) ‧‧‧Remote mold room

(70) ‧‧‧channel

(80) ‧‧‧Runner

(801) ‧‧‧Inlet

(802) ‧‧‧ Outlet

The first figure is an exploded perspective view of a preferred embodiment of the present invention. The second figure is a three-dimensional combined view of a preferred embodiment of the present invention. The third figure is a perspective view of some elements of a preferred embodiment of the present invention. The fourth diagram is a cross-sectional view of a preferred embodiment of the present invention, taken along the cutting plane line of FIG. 4-4. The fifth figure is a cross-sectional view of a preferred embodiment of the present invention, and shows a use state in which the mold is closed again with a part of the structure.

Claims (10)

A material injection structure for a polymer article forming mold includes: a first mold portion; a second mold portion separated from the first mold portion; On the first mold part; a third mold part is interposed between the first mold part and the second mold part, and makes one of the first part open to the air with respect to one end of the channel; at least one An end mold chamber is interposed between the first mold part and the third mold part overlapped with each other, and is not in communication with the channel; at least one remote mold chamber is interposed between the second mold part overlapped with each other. And the third mold part; at least one sprue provided on the first mold part is in communication with the proximal mold cavity; and the first-grade flow path is provided on the third mold part and is connected with the distal mold part The chambers communicate with each other, and an inlet is formed on the first part. According to the injection structure of the polymer article forming mold according to claim 1, wherein the third mold part has: a third mold body; and a first convex body protruding from the third part as the first part The die body faces one side of the first die part and can be put in the channel. According to the injection structure of the polymer article forming mold according to claim 2, wherein the inflow port of the flow channel is located on the end of the first convex body away from the third mold body. The injection structure of the polymer article forming mold according to claim 2, wherein the first convex system is in a push shape. According to the injection structure of the polymer article forming mold according to claim 1, wherein the second mold part further includes: a second mold body; and an accommodating space recessed in the second mold body opposite to the second mold body. The third mold part has an end surface and a second part opposite to one of the third mold parts. The injection structure of the polymer article forming mold according to claim 5, wherein the flow channel is formed on the second part to form an outlet. According to the injection structure of the polymer article forming mold according to claim 6, wherein the third mold part has: a third mold body; and a second convex body, which protrudes from the first part as the second part. The three mold body is opposite to one side of the second mold part, and can be put in the accommodation space. The injection structure of the polymer article forming mold according to claim 7, wherein the number of the remote mold chambers is two, and the accommodating space is between the remote mold chambers. According to the injection structure of the polymer article forming mold according to claim 8, wherein the third mold part has a runner divided in two on the second mold body, and connects the remote mold chambers and the accommodation space respectively. . According to the injection structure of the polymer article forming mold according to claim 9, wherein the runner is formed on the second convex body to form two outlets, which are respectively communicated with the runners on the second die body.