CN201070820Y - Push-out structure on glue feeding side - Google Patents

Abstract

The utility model discloses a plastic feeding nozzle side push-out structure used for a backing up type mould which directly pushes the product out of a cavity insert, and a two-tone color mould which pushes the product out of the cavity insert and stays in a core insert to carry on the second time moulding or pushes the product out of the insert after the second time moulding, wherein, a cavity plate facing one side of the cavity insert is concavely provided with a crest slab slot which is provided with an upper crest slab and a lower crest slab; the crest slab slot extends a plurality of spring slots continually in all round way, a plurality of springs are pressed between the bottom of the spring slots and the upper surface of the upper crest slab; the out-of-center position of the lower crest slab is provided with a plurality of shoulder holes extending in the same direction and perforating a return pin and a thimble separately; one end of the return pin and the thimble perforates the cavity insert separately to push the core insert and the product, and the top surface of the other end is separately flush with the upper crest slab and the lower crest slab in the interface, the upper crest slab and the lower crest slab are locked fixedly by a fastening piece, and the return pin and the thimble are fastened on the assembly of the upper crest slab and the lower crest slab. The utility model can be used for pushing the product or preventing the product from sticking the cavity plate in the process of die sinking.

Description

Glue side ejection structure

【Technical field】

The utility model relates to an ejection structure capable of ejecting a product out of the mold at the side where the glue is fed, that is, the direction of the mother mold.

【Background technique】

In the reverse injection mold, if the product cannot be ejected from the male mold side, it is necessary to use a hydraulic cylinder to assist ejection. The cost of this processing method will be very high. In the two-color mold, the product needs secondary molding, that is, the product formed for the first time is separated from the first female mold and left in the male mold, and then the male mold and the second female mold are subjected to the second molding. However, when the mold is opened for the first time, if the product sticks to the male mold (not the glue-in side), the second glue-in cannot be completed. In the past, the top block was used to eject the product side, but if the product needs to be formed with four-sided sliders, that is, when the male mold side does not rely on the broken surface, the top block cannot be used.

In view of this, it is necessary to provide an ejection structure that can keep the product in the male mold when the female mold is separated.

【Content of invention】

The purpose of the utility model is to provide an ejection structure capable of ejecting products on the mother mold side (glue-incoming side).

In order to achieve the above purpose, the utility model proposes an ejection structure on the side of the glue inlet, which is used to directly eject the product out of the core of the female mold for the reverse pouring mold, and to eject the product out of the core of the female mold and leave it in the core of the male mold for the two-color mold. During the second molding or after the second molding, the product is ejected out of the mold core. Among them, a top plate groove is recessed on the side of the mother template facing the mother mold core, and the upper and lower top plates are accommodated, and the top plate groove continues to extend around a certain amount. In the spring groove, a number of springs are pressed between the bottom of the spring groove and the upper surface of the upper top plate. In addition, the lower top plate is provided with several stepped holes extending in the same direction away from the center, which are respectively used to pass through the return pin and the thimble. One end of the return pin and the thimble respectively passes through the female mold core to bear on the male mold core and the product, and the top surface of the other end is respectively flush with the interface of the upper and lower top plates, and the upper and lower top plates are locked with fasteners, then The return pin and the thimble are fixed on the assembly of the upper and lower top plates.

Compared with the prior art, the utility model is equipped with an ejection structure on the master mold on the glue-in side, which can eject the product or prevent the product from sticking to the master mold when the mold is opened. Use under the situation that mold sticks master mold, have reached the purpose of this utility model in fact.

【Description of drawings】

Fig. 1 is the front view of the ejection structure at the glue-inlet side of the utility model in the mold-closed state.

Fig. 2 is a front view of the ejection structure on the glue-inlet side of the present invention in a mold-opening state.

【Detailed ways】

Please refer to Fig. 1, the ejection structure on the glue-in side of the utility model is used to directly eject the product out of the core of the female mold in the reverse pouring mold, and to eject the product out of the core of the female mold in the two-color mold and leave it in the male mold core for the second step. After secondary molding or secondary molding, the product is ejected out of the mold core, wherein, a top plate groove is opened on the side of the mother template 1 facing the mother mold core 2, and the upper and lower top plates 61, 62 are accommodated. The depth of the top plate groove is The sum of the thickness of the lower top plates 61, 62 and the ejection strokes of the upper and lower top plates 61, 62, and the upper and lower top plates 61, 62 are pressed against the bottom of the top plate groove under the mold clamping state, and several springs continue to extend around the top plate groove Groove, a plurality of springs 51 are pressed between the bottom of the spring groove and the upper surface of the upper top plate 61. Also, the lower top plate 62 is provided with several stepped holes extending in the same direction at a position deviated from the central axis, which are respectively used to pass through the return pin 5 and the thimble 7, and one end of the return pin 5 and the thimble 7 passes through the top of the female mold core 2 respectively. Hold the male mold core 3 and the product 4, the top surface of the other end is flush with the interface of the upper and lower top plates 61, 62 respectively, and the upper and lower top plates 61, 62 are locked with fasteners such as screws, then the return pin 5. The thimble 7 is fixed on the combination of the upper and lower top plates 61,62.

A sprue bushing is set on the side of the female mold core 2 away from the female template 1, and the sprue bushing extends to the interface between the male and female mold cores 2 and 3 to form a flow channel 8, which includes the upper part and the sprue. The extension direction of the mouth bush is bent at an angle or parallel to the first flow channel, and the end of the first flow channel extends a distance from the central axis and passes through the upper and lower top plates 61, 62 and enters the male and female mold cores 2 in a straight line. , 3 The second flow channel of the interface.

When assembling, the return pin 5 and the thimble 7 first penetrate the stepped hole of the lower top plate 62, and then the upper top plate 61 covers the opposite side of the return pin 5 and the thimble 7 of the lower top plate 62, and fastening parts such as screws Lock the upper and lower top plates 61, 62, then the return pin 5 and thimble 7 are fixed on the combination of the upper and lower top plates 61, 62, and finally the spring 51 is placed in the spring groove.

When opening the mold for the first time, referring to Fig. 2, the female template 1 moves up, the spring 51 relaxes, the upper and lower top plates 61, 62 move towards the female mold core 2, and the return pin 5 moves down, and its stroke is less than that of the female mold core. The stroke of the template 1 until the return pin 5 gradually changes from touching the male die core 3 to being separated from the male die core 3. At this time, the thimble 7 still supports the product 4, and waits until the upper and lower top plates 61 and 62 run to the female die core 2 At the bottom, the ejector pin 7 completes the ejection action and separates from the product 4. At this time, the product 4 stays in the male mold core 3 and rotates, which is convenient for the second forming action.

When closing the mold, refer to Figure 1 and Figure 2 together, the male mold core 3 will return the return pin 5 and press it up, the spring 51 will be compressed, the upper and lower top plates 61, 62 will move up until they withstand the bottom of the top plate groove, and the ejector pin 7 will enter inside the molding cavity.

The position of the above return pin is only provided for describing the utility model, but is not limited to the content of this instruction manual, as long as it cannot be in the position where it is broken with the male die, and it cannot be pushed against the slide block.

The elastic coefficient of the spring should not be too large, otherwise the reaction force of the return pin will be too large and the top plate will be deformed when the mold is closed.

Claims (4)

1. An ejection structure on the side of the glue inlet, which is used to directly eject the product out of the female mold core of the reverse pouring mold, and to eject the product out of the female mold core of the two-color mold and leave it in the male mold core for the second molding or After the second molding, the product is ejected out of the mold core, wherein, a top plate groove is recessed on the side of the master template facing the mother mold core, and the feature is that: the upper and lower top plates are arranged in the top plate groove, and the lower top plate is deviated from the center There are several stepped holes extending in the same direction at the position, which are respectively used to pass through the return pin and the thimble. One end of the return pin and the thimble respectively passes through the female mold core to bear on the male mold core and the product, and the top surface of the other end is respectively It is flush with the interface between the upper and lower top plates, and the upper and lower top plates are locked with fasteners, then the return pin and thimble are fixed on the combination of the upper and lower top plates, and a number of springs continue to extend around the top plate groove Groove, a number of springs are pressed between the bottom of the spring groove and the upper surface of the upper top plate. 2 . The ejection structure at the glue inlet side according to claim 1 , wherein the depth of the top plate groove is the sum of the thickness of the upper and lower top plates and the ejection strokes of the upper and lower top plates. 3 . 3. The ejection structure at the glue-inlet side according to claim 1 or 2, characterized in that: it also includes a flow channel set at a distance from the central axis, and the flow channel also passes through the upper and lower top plates to enter the male and female molds Ren interface. 4. The ejection structure at the glue inlet side according to claim 3, wherein the upper section of the runner is bent at an angle or parallel to the extending direction of the sprue bushing.

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