CN205951203U - Runner automatic cutout's mould - Google Patents

Abstract

The utility model discloses a runner automatic cutout's mould, include: cover half, movable mould and flow distribution plate, the cooperation is formed with the die cavity between cover half and the movable mould, be equipped with the sprue on the cover half, flow distribution plate slidable sets up on the movable mould, upper surface undercut formation subchannel system, the subchannel system respectively with die cavity and sprue intercommunication. The utility model discloses technical scheme through with subchannel system configuration on the flow distribution plate of structure is taken out to a side, drive flow distribution plate along perpendicular die sinking orientation motion when the die sinking to realize the runner and the injection moulding product autosegregation of subchannel system, reduced the process time of product, reduced manufacturing cost.

Description

Mold with automatic gate cut-off

technical field

The utility model relates to the field of injection molds, in particular to a mold with automatic gate cutting.

Background technique

In the gating system of the injection molding mold, the gate is the melt channel connecting the runner and the cavity. Side gate and lap gate are the most commonly used gate designs in plastic molds. The advantages of this type of gate design are convenient processing, small pressure loss, and easy modification. The disadvantage is that the product is connected to the runner after it is released from the mold. Together, it is necessary to manually remove the gate or use a special jig to remove the gate, so it is necessary to invest a certain amount of manpower and material resources for this, and the entire production cycle will also be extended to a certain extent; Certain defective and defective products will eventually lead to an increase in production costs.

In today's increasingly automated production mode, it is necessary to develop a mechanism for automatically removing the gate inside the plastic mold that shortens the production cycle and reduces production costs.

Utility model content

The main purpose of the utility model is to propose a mold with automatic gate cut-off to solve the technical problem in the prior art that the injection molding product cannot be automatically separated from the flow channel when it is demoulded.

In order to achieve the above object, the utility model proposes a mold for automatic gate cutting, which is characterized in that it includes:

A fixed mold and a movable mold, a mold cavity is formed by cooperation between the fixed mold and the movable mold, and a main flow channel is provided on the fixed mold;

A splitter plate is slidably arranged on the movable mold;

The runner system is formed by the downward depression of the upper surface of the runner plate, and communicates with the mold cavity and the main runner respectively.

Preferably, an ejector hole communicating with the runner system is provided in the manifold, and the runner system is provided with a gate communicating with the mold cavity on the side wall of the manifold.

Preferably, one end of the diverter plate is provided with a slanted guide post hole, and the fixed mold is provided with a slanted guide post which is slidably fitted with the slanted guide post hole; The cooperation of the guide post holes has a first state in which the gate communicates with the mold cavity and a second state in which the gate is misaligned with the mold cavity.

Preferably, when the distribution plate is in the first state, the ejector pin hole is misaligned with the ejector pin of the mold, and when the distribution plate is in the second state, the ejector pin hole corresponds to the ejector pin of the mold.

Preferably, there are multiple mold cavities and multiple gates, and the multiple gates are evenly distributed along the circumference of the distributor plate and communicate with the multiple mold cavities in one-to-one correspondence.

Preferably, the diameter of the gate is determined according to the distance between it and the sprue, and the farther away from the sprue, the larger the diameter of the gate.

Preferably, the cross section of the flow channel of the runner system tapers from top to bottom to form a draft angle.

The technical scheme of the utility model sets the runner system on a distributor plate with a side pumping structure, and drives the distributor plate to move along the vertical mold opening direction when the mold is opened, thereby realizing the automatic separation of the gate of the runner system from the injection molded product, reducing the The processing time of the product is shortened, and the production cost is reduced.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the present utility model, and those skilled in the art can also obtain other drawings according to the structures shown in these drawings without creative work.

Fig. 1 is the structural representation of the mold that gate of the utility model cuts off automatically;

Fig. 2 is a schematic diagram of a partial cross-sectional structure in the direction of A in Fig. 1;

Fig. 3 is a top view of the splitter plate of the present invention.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present utility model, the directional indication is only used to explain the position in a certain posture (as shown in the accompanying drawing). If the relative positional relationship, movement conditions, etc. between the components shown in the figure below are changed, if the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. Implying their relative importance or implying the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , also not within the scope of protection required by the utility model.

As shown in Figures 1 to 3, an embodiment of the mold for automatic gate cutting of the utility model includes a fixed mold 10, a movable mold 20 and a splitter plate 30, and the fixed mold 10 and the movable mold 20 are formed in cooperation with each other. There is a mold cavity 40, and the fixed mold 10 is provided with a main channel 15; the splitter plate 30 is located between the fixed mold 10 and the movable mold 20 and is slidably arranged on the movable mold 20, and the upper surface of the splitter plate 30 faces A runner system 31 is formed in the lower depression, and the runner system 31 communicates with the mold cavity 40 and the sprue 15 respectively.

Wherein, the fixed mold 10 comprises an upper fixed plate 11, a female template 12 and a female mold core 13, the female template 12 is fixed on the bottom surface of the upper fixed plate 11, the female mold core 13 is embedded in the bottom of the female template 12, and the female mold core 13 The bottom surface is concave upward to form a mold cavity; the movable mold 20 includes a male mold core 21, a male template 22, a backing plate 23, a lower fixing plate 25 and an ejector device 24, and the male template 22, the backing plate 23 and the lower fixing plate 25 are fixed in sequence Connected, the male mold core 21 is embedded on the top of the male template 22, and the top surface of the male mold core 21 protrudes upwards to form a core, and the cavity and the core together form a mold cavity 40 for molding injection-molded products.

The splitter plate 30 is slidably arranged on the male template 22 and the male mold core 21 of the fixed mold 10 through a pressure plate or a T-shaped chute, and an inclined guide post hole 34 is arranged on its outer end, and the fixed mold 10 is provided with an inclined guide post hole 34. The guide post hole 34 is slidingly fitted with the inclined guide post 14, the upper end of the inclined guide post 14 passes through the mother template 12 and is fixed on the mother template 12 through the upper fixing plate 11; , including a runner 311 and a gate 312, the cross section of the runner 311 tapers from top to bottom to form a demoulding angle, the cross section can also adopt a semicircular structure, the runner 311 is vertically connected with the main channel 15, A gate 312 for communicating with the mold cavity 40 is provided on the side wall of the manifold 30, and the other end of the gate 312 communicates with the runner 311; It communicates with the distribution channel 311 , and the lower end penetrates to the bottom surface of the distribution plate 30 .

The splitter plate 30 forms a side-drawing slider structure through the cooperation of the inclined guide post 14 and the inclined guide post hole 33, which has a first state and a second state; 30 is in the first state. At this time, the gate 312 is in communication with the mold cavity 40, and the ejector pin hole 32 is misaligned with the ejector pin 241 of the ejector device 24. In this way, when the molten material enters the runner 311 from the main channel 15, it can pass through the gate 312 flows into the mold cavity 40, and the thimble hole 32 located under the runner system 31 can collect the cold material when the molten material is first injected; The guide pillar 14 drives the diverter plate 30 to move toward the inclined guide pillar 33 through the inclined guide pillar hole 33 on the outer end of the manifold 30, and its moving direction is perpendicular to the mold opening direction of the fixed mold 10 and the movable mold 20, thereby driving the gate 312 Completely separated from the injection molded product of the cavity 40, the action of automatically cutting off the gate 312 is completed. After the mold opening is completed, the manifold 30 is in the second state. The ejector pins 241 of the ejector device 24 are aligned, so that after the mold is opened, the ejector device 24 can eject the cold material formed in the runner system 31 while ejecting the injection molded product.

Preferably, both the mold cavity 40 and the gates 312 are multiple, and the multiple gates 312 are uniformly distributed along the circumference of the distributor plate 30 and communicate with the multiple mold cavities 40 in one-to-one correspondence. , the diameter of the gate 312 is determined along with the distance between it and the sprue 15 , and the farther the gate 312 is from the sprue 15 , the larger the diameter is. In this way, when the molten material enters the runner 311 from the main channel 15 and flows to each gate 312 respectively, the molten material flowing to the gate 312 which is farther away has a larger diameter of the gate, which reduces the influence of the gate on the molten material. The pressure offsets the pressure on the gate 312 caused by the increased distance between the gate 312 and the sprue 15, so that when the molten material is injected into each cavity 40 with a different distance from the sprue 15, each cavity 40 The pressure on the melt at the corresponding gate 312 is balanced, so that the melt is evenly injected into each cavity 40, avoiding the phenomenon of lack of material in the cavity 40 at the end of the runner 311 due to insufficient filling .

The above is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. Under the inventive concept of the utility model, the equivalent structural transformation made by using the specification of the utility model and the contents of the accompanying drawings, or Direct/indirect application in other relevant technical fields is included in the patent protection scope of the present utility model.

Claims (7)

1. A mold for automatic gate cutting, characterized in that it comprises: A fixed mold and a movable mold, a mold cavity is formed by cooperation between the fixed mold and the movable mold, and a main flow channel is provided on the fixed mold; A splitter plate is slidably arranged on the movable mold; The runner system is formed by the downward depression of the upper surface of the runner plate, and communicates with the mold cavity and the main runner respectively. 2. The mold with automatic gate cut-off according to claim 1, characterized in that, the splitter plate is provided with a thimble hole communicating with the runner system, and the runner system is connected to the splitter plate. A gate communicating with the mold cavity is opened on the side wall. 3. The mold for automatic gate cutting according to claim 2, characterized in that, one end of the splitter plate is provided with a slanted guide post hole, and the fixed mold is provided with a slanted guide post hole for sliding fit with the slanted guide post hole. through the cooperation of the inclined guide post and the hole of the inclined guide post, the splitter plate has a first state in which the gate is in communication with the mold cavity and the dislocation between the gate and the mold cavity second state. 4. The mold with automatic gate cut-off according to claim 3, characterized in that, when the manifold is in the first state, the thimble hole and the ejector pin of the mold are misaligned, and when the manifold is in the second state , the thimble hole corresponds to the thimble of the mold. 5. The mold for automatic gate cutting according to claim 2, characterized in that, the mold cavity and the gate are multiple, and the multiple gates are evenly distributed along the circumference of the distributor plate, and communicate with the plurality of mold cavities in one-to-one correspondence. 6. The mold with automatic sprue cut-off according to claim 5, characterized in that, the diameter of the gate is determined along with the distance between it and the sprue, and the farther the sprue is from the sprue The larger the caliber of the mouth. 7. The mold with automatic gate cut-off according to claim 1, characterized in that, the cross-section of the runner of the runner system tapers from top to bottom to form a demoulding angle.