Side glue feeding mechanism mounted on injection mold

Abstract

The utility model relates to the technical field of injection molds, and discloses a side glue feeding mechanism mounted on an injection mold, which comprises an elastic needle baffle plate and a sliding block which are arranged left and right, one side of the elastic needle baffle plate can extend into a baffle plate groove correspondingly arranged below the left side of the sliding block, and an elastic needle horizontally extending into the sliding block is arranged on the upper side of the baffle plate groove; a vertical glue inlet runner I and a transverse glue inlet runner II are formed in the right end of the sliding block; a lower runner opening of the glue inlet runner I is communicated with a left runner opening of the glue inlet runner II; a containing cavity allowing the elastic needle to penetrate through is formed in the sliding block, the elastic needle is annularly sleeved with a spring, and the elastic needle can slide left and right in the containing cavity and the second glue inlet runner which communicate with each other. According to the utility model, non-appearance surface glue feeding of a product is realized, glue feeding points are prevented from being formed on the appearance surface, and the requirement on the appearance of the product is realized with lower cost; and meanwhile, the separation of the drainage opening material in the glue inlet runner is effectively realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection mold technical field, more specifically, relate to a side glue feeding mechanism installed on injection mold. BACKGROUND

[0002] Injection mold is a kind of tool for producing plastic products, by high pressure into the cavity of the mold of the molten plastic particles, cooling forms the required plastic product.Injection mold is composed of two parts of movable die and fixed die (or male die and female die), the two parts can be separated to take out product, and when closing, the blank is injected into the mold cavity and shaped.Injection mold is widely used in industrial production, mainly for batch production of complex parts.Injection mold cavity and molding parts are the parts directly contacted with plastic, and high machining finish and precision are required.

[0003] The conventional glue feeding mode of injection mold is to feed glue on the front and rear mold core parting surface of injection mold, but with the increasing requirement of plastic product appearance, the appearance parting is required not to have glue feeding point when the mold is opened, otherwise stress marks will be produced in plastic product forming, and the appearance of workpiece and residual material connecting surface will be affected when removing residual material, so glue needs to be fed from the bottom of product or other non-appearance surface to achieve the requirement of product appearance.At this time, unconventional glue feeding mode (i.e.not feeding glue from the front and rear mold core parting surface of product) is selected to achieve the required effect.But this unconventional glue feeding mode needs to be made through injection mold with relatively complex structure, resulting in that the production cost of these plastic products is often high, and there may be the problem that the water gate material is not easy to separate from the product. UTILITY MODEL CONTENT

[0004] Therefore, the utility model provides a side glue feeding mechanism installed on injection mold, and the specific technical scheme is as follows:

[0005] A side glue feeding mechanism installed on an injection mold, installed on the side of the front and rear mold cores, comprising a left and right arranged elastic pin baffle and a slider, the elastic pin baffle is fixed on the mold core of the upper mold, and the slider is installed on the lower mold core of the mold; the shape of the elastic pin baffle is a right-angled trapezoid with a bevel on the lower right side, the right short parallel side of the elastic pin baffle can extend to the left side below the baffle groove corresponding to the baffle groove, the upper side of the baffle groove is provided with an elastic pin extending horizontally into the slider, the elastic pin is limited by the pressing plate installed on the left outer wall of the slider to prevent the elastic pin from sliding out of the slider to the left; a vertical glue feeding channel one and a horizontal glue feeding channel two are formed in the right end of the slider, the lower channel of the glue feeding channel one and the left channel of the glue feeding channel two are communicated; the left end of the elastic pin can correspondingly abut against the short parallel side of the elastic pin baffle, a containing cavity is formed in the left side of the slider for the elastic pin to pass through, a spring is sleeved on the elastic pin, and the left end of the spring abuts against the stepped matching surface on the elastic pin, and the right end abuts against the right wall of the containing cavity; the right end of the elastic pin extends out of the containing cavity and extends to the left side of the communication between the glue feeding channel one and the glue feeding channel two, and the elastic pin can slide left and right in the containing cavity and the glue feeding channel two.

[0006] Preferably, the elastic pin baffle is provided with two parallel elastic pin baffles in the front and rear directions, and the slider is provided with two groups of elastic pins, springs and glue feeding channels.

[0007] Preferably, an installation block is integrally formed on the top of the elastic pin baffle, a threaded hole is formed in the installation block, and the elastic pin baffle is fixed on the mold core of the upper mold through screws matched with the threaded hole.

[0008] Preferably, the diameter of the upper channel of the glue feeding channel one is larger than that of the lower channel, and the diameter of the right channel of the glue feeding channel two is larger than that of the left channel.

[0009] Preferably, the shape of the elastic pin baffle is a right-angled trapezoid with a sharp angle cut off at the lower side.

[0010] Preferably, when the mold is opened, the water gate plate on the injection mold drives the water gate material one in the glue feeding channel one to separate from the slider first, the inclined guide pillar on the injection mold drives the slider to move to the left, and the mold core of the upper mold drives the elastic pin baffle to move up, in this process, the right short parallel side of the elastic pin baffle abuts against and pushes the elastic pin to move to the right, so that the elastic pin ejects the water gate material two in the glue feeding channel two.

[0011] Compared with the prior art, the side glue feeding mechanism installed on the injection mold has the advantages that when the mold is injected, the plastic can enter the glue feeding flow passage one of the utility model mechanism through the water gap flow passage of the three-plate mold of the injection mold, and then enter the inner cavity of the injection mold through the right flow passage opening of the glue feeding flow passage two of the mechanism to realize product molding, since the utility model mechanism is located at the side of the upper and lower mold cores, side glue feeding is realized, that is, non-outer appearance surface glue feeding of the product is realized, the appearance surface is avoided from forming a glue feeding point, and the appearance requirement of the product is realized at a lower cost.

[0012] Meanwhile, the utility model also effectively realizes the separation of the water gap material in the glue feeding flow passage through the joint action of the ejector pin baffle, the sliding block, the spring and the ejector pin when the mold is opened, reduces the processing steps, and improves the production efficiency and resource utilization. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only the embodiments of the utility model, and other drawings can be obtained according to the provided drawings without creative labor for those skilled in the art.

[0014] Figure 1 It is a whole structure schematic view of the utility model a side glue feeding mechanism installed on an injection mold.

[0015] Figure 2 It is a top view of the utility model a side glue feeding mechanism installed on an injection mold.

[0016] Figure 3 It is Figure 2 It is a sectional view in A-A direction.

[0017] Figure 4 It is a structure schematic view of the ejector pin matched with the spring.

[0018] Figure 5 It is a front view of the utility model in the mold closing state.

[0019] Figure 6 It is a top view of the utility model in the mold closing state.

[0020] Figure 7 It is a front view of the utility model in the mold opening state.

[0021] Figure 8 It is a top view of the utility model in the mold opening state.

[0022] In the figure: 1 - the needle baffle, 2 - slider, 3 - baffle slot, 4 - needle, 5 - the plate, 6 - containing cavity, 7 - spring, 8 - step matching surface, 9 - mounting block, 10 - screw, 11 - nozzle material one, 12 - nozzle material two. DETAILED DESCRIPTION

[0023] Embodiments of the present application will be described in detail below, examples of which are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0024] In the description of the present application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0025] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0026] Embodiments:

[0027] The present embodiment provides a side edge glue feeding mechanism installed on an injection mold, which is specifically installed on the side edges of front and rear mold cores. The mechanism can feed glue on the side edges of the front and rear mold cores, and has a very regular glue feeding mode.

[0028] Specifically, referring to Figures 1-4 The side edge glue feeding mechanism installed on the injection mold includes a needle baffle 1 and a slider 2 arranged left and right. The needle baffle 1 is fixed on the mold core of the upper mold, and the slider 2 is installed on the mold core of the lower mold.

[0029] The spring pin baffle 1 is a right trapezoid with its hypotenuse on the lower right side. The shorter parallel right side of the spring pin baffle 1 extends into the corresponding baffle groove 3 located on the lower left side of the slider. A spring pin 4 extends horizontally into the slider from the upper side of the baffle groove 3. The spring pin 4 is limited by a pressure plate 5 mounted on the outer left wall of the slider to prevent it from sliding to the left out of the slider 2. The slider 2 has a vertical glue inlet channel one and a horizontal glue inlet channel two inside its right end. The lower opening of glue inlet channel one connects to the lower opening of glue inlet channel two. The left flow channel is connected; the left end of the spring pin 4 can abut against the short parallel side of the spring pin baffle 1. The slider has a receiving cavity 6 on the left side for the spring pin 4 to pass through. A spring 7 is ringed on the spring pin 4, and the left end of the spring 7 abuts against the stepped mating surface 8 on the spring pin 4, and the right end abuts against the right wall of the receiving cavity 6. The right end of the spring pin 4 extends out of the receiving cavity 6 and extends to the left side of the connection between the first and second glue inlet channels. The spring pin 4 can slide left and right in the connected receiving cavity 6 and the second glue inlet channel.

[0030] The upper runner of the first injection runner is connected to the sprue plate runner of the three-plate injection mold, and the right runner of the second injection runner is connected to the inner cavity of the injection mold. When the mold is being injected, the plastic first enters the first injection runner of this invention through the sprue plate runner of the three-plate injection mold, and then enters the inner cavity of the injection mold from the right runner of the second injection runner, thus realizing the injection molding of the product.

[0031] This invention enables glue to be dispensed onto non-surface surfaces of the product via side-feeding, avoiding glue injection points on the surface and thus achieving product appearance requirements at a lower cost. Simultaneously, this invention effectively removes sprue material from the glue inlet channel, improving production efficiency and resource utilization.

[0032] In a further specific embodiment, there are two spring needle baffles 1 arranged in parallel in the front-back direction, and the slider 2 is provided with two sets of spring needles 4, springs 7 and glue inlet channels, that is, the present invention will generate two sets of sprue material during injection molding.

[0033] In a further specific embodiment, the top of the spring needle baffle 1 is integrally machined with a mounting block 9, and the mounting block 9 has a threaded hole. The spring needle baffle 1 is fixed to the upper mold core of the mold by a screw 10 that matches the threaded hole.

[0034] In a further specific embodiment, the diameter of the upper runner opening of the first sprue channel is larger than the diameter of the lower runner opening, and the diameter of the right runner opening of the second sprue channel is larger than the diameter of the left runner opening. This minimizes the connection point between the sprue material 11 generated in the first sprue channel and the sprue material 12 generated in the second sprue channel, making it easier to disconnect the sprue material 11 and the sprue material 12 during mold opening, allowing the sprue plate to easily detach the sprue material 11 from the slider 2 first.

[0035] In a further specific embodiment, the left end of the spring pin 4 that contacts the spring pin baffle 1 is a hemispherical end. The shape of the spring pin baffle 1 is a right trapezoid with its acute lower angle cut off.

[0036] The assembly method of this utility model mechanism is as follows: the spring pin 4 is mounted on the slider 2 and pressed down by the pressure plate 5. The pressure plate 5 is fixed to the slider 2 by corresponding fixing screws 10. The spring 7 is pressed and installed in the middle of the spring pin 4, and its two sides respectively abut against the stepped mating surface 8 on the spring pin 4 and the inner wall of the receiving cavity 6. The spring pin baffle 1 is fixed to the upper mold core of the mold by screws 10 to block the stroke of the spring pin 4.

[0037] In this invention, the spring pin 4 can slide left and right within the receiving cavity 6 connected to the glue inlet channel 2 in the slider 2. Figure 5 , 6 As shown, when the mold is being injected, the plastic first enters the first injection channel through the sprue plate of the three-plate injection mold, and then enters the inner cavity of the injection mold from the right sprue of the second injection channel to achieve product molding.

[0038] like Figure 7 , 8 As shown, when the mold opens, the sprue plate on the injection mold causes the sprue material 11 in the first runner to detach from the slider 2. The inclined guide post on the injection mold causes the slider 2 to move to the left (i.e., move closer to the spring pin baffle). At the same time, the mold core on the mold causes the spring pin baffle 1 to move upward and away. During this process, the right short parallel edge of the spring pin baffle 1 abuts against and pushes the spring pin 4 to move to the right, so that the spring pin 4 pushes out the sprue material 12 in the second runner. Then the spring pin baffle 1 is completely removed, and the spring 7 causes the spring pin 4 to return to its original position.

[0039] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on its differences from other embodiments. Similar or identical parts between embodiments can be referred to interchangeably. For the apparatus disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple; relevant parts can be referred to the method section.

[0040] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A side edge gate mechanism mounted on an injection mold, characterized by, The side of the front and rear mold cores is provided with a slide block and a pin stopper arranged left and right, the pin stopper is fixed on the upper mold core of the mold, and the slide block is installed on the lower mold core of the mold; the pin stopper is in the shape of a right-angled trapezoid with the oblique side on the lower right side, the right short parallel side of the pin stopper can extend to the left lower side of the slide block and enter the stopper groove, the upper side of the stopper groove is provided with a pin extending to the inside of the slide block, the pin is limited by the pressing plate installed on the left outer wall of the slide block to prevent the pin from sliding out of the slide block to the left; the inside of the right end of the slide block is provided with a vertical glue inlet channel one and a horizontal glue inlet channel two, the lower channel of the glue inlet channel one is in communication with the left channel of the glue inlet channel two; the left end of the pin can correspondingly abut against the short parallel side of the pin stopper, the left side of the inside of the slide block is provided with a containing cavity for the pin, the pin is sleeved with a spring, the left end of the spring abuts against the stepped matching surface on the pin, and the right end of the spring abuts against the right wall of the containing cavity; the right end of the pin extends out of the containing cavity and extends to the left side of the communication position of the glue inlet channel one and the glue inlet channel two, and the pin can slide left and right in the containing cavity and the glue inlet channel two.

2. A side edge gate mechanism for mounting on an injection mold as defined in claim 1, wherein The pin stopper is provided with two parallel pin stoppers in the front and back directions, and the slide block is provided with two groups of pins, springs and glue inlet channels.

3. A side edge gate mechanism for mounting on an injection mold as defined in claim 2, wherein The top of the pin stopper is integrally provided with a mounting block, the mounting block is provided with a threaded hole, and the pin stopper is fixed on the upper mold core of the mold through the screws matched with the threaded hole.

4. A side edge gate mechanism for mounting on an injection mold as defined in claim 1, wherein The diameter of the upper channel of the glue inlet channel one is greater than that of the lower channel, and the diameter of the right channel of the glue inlet channel two is greater than that of the left channel.

5. A side-gating mechanism for an injection mold according to claim 1, wherein The pin stopper is in the shape of a right-angled trapezoid with the lower acute angle cut off.

6. A side edge gate mechanism for mounting on an injection mold according to any one of claims 1-5, wherein When the mold is opened, the pin stopper is driven upward by the upper mold core of the mold, the right short parallel side of the pin stopper abuts against and pushes the pin to move to the right, and the pin pushes out the water inlet material two in the glue inlet channel two.

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