Nozzle structure of injection molding equipment

Abstract

The utility model provides a nozzle structure of injection molding equipment, which is easy to manufacture and assemble and can prevent resin from remaining in a flowing path. A nozzle structure of an injection molding apparatus includes: a nozzle having a valve pin hole into which a valve pin is inserted, a resin hole for opening and closing the gate, and a gate through which molten resin flows, the nozzle including a first nozzle portion and a second nozzle portion, the valve pin hole being continuously formed in the first nozzle portion and the second nozzle portion, and the gate being provided with a gate through which molten resin flows; the resin hole is continuously formed in the first nozzle part and the second nozzle part, the resin hole in the second nozzle part is separated from the valve pin hole, the resin hole in the first nozzle part extends from the connecting surface of the first nozzle part and the second nozzle part to the valve pin hole and merges with the valve pin hole, the gate is formed in the first nozzle part, and the first nozzle part has a flange part. The second nozzle part is provided with a threaded part, the nozzle structure of the injection molding equipment further comprises a connecting piece, and the connecting piece is connected to the flange part and screwed to the threaded part so that the first nozzle part and the second nozzle part can be connected.

Description

TECHNICAL FIELD

[0001] The utility model relates to a nozzle structure, especially a nozzle structure of injection molding equipment. BACKGROUND

[0002] In the prior art, a resin hole for flowing of molten resin and a valve pin hole for insertion of a valve pin are formed in a nozzle, and a downstream section of the resin hole is formed to be inclined with respect to the nozzle axis so that a gate at a front end of the nozzle merges into the valve pin hole. In order to manufacture the nozzle having the resin hole of the above form, it is necessary to drill a hole from the upstream side of the nozzle in the nozzle axis direction and to drill a hole from the upstream side of the nozzle in the inclined direction, which is complicated in the process, and a step difference and an extra thickness are easily generated at the connection between the axial hole and the inclined hole due to this processing method. In addition, since the resin hole and the valve pin hole merge at the gate, a step difference and an extra thickness are also easily generated at the merging position. The step difference and the extra thickness hinder the flow of the resin and cause stagnation and residue of the resin, so that the residue of the resin must be removed when the color or type of the resin is changed, which results in poor processing efficiency. Therefore, it is necessary to improve the nozzle structure of the injection molding equipment to overcome the above problems. SUMMARY

[0003] The utility model provides a nozzle structure of injection molding equipment, easy to manufacture and assemble, and can avoid that the resin remains in the flow path.

[0004] The utility model provides a nozzle structure of injection molding equipment, including: nozzle, with valve pin hole, resin hole and gate, the valve pin hole is used for valve pin insertion, the valve pin is used for opening and closing the gate, the resin hole is used for flowing through the molten resin, the nozzle includes connected first nozzle part and second nozzle part, the valve pin hole is continuously formed in the first nozzle part and the second nozzle part and becomes linear, the resin hole is continuously formed in the first nozzle part and the second nozzle part, the resin hole in the second nozzle part is separated from the valve pin hole, the resin hole in the first nozzle part extends linearly from the connecting surface of the first nozzle part and the second nozzle part to the valve pin hole and merges into the valve pin hole, the gate is formed in the first nozzle part, the first nozzle part has flange part, the outer surface of the second nozzle part has screw thread part, the nozzle structure of injection molding equipment still includes connecting piece, the connecting piece is jointed in the flange part and is screwed in the screw thread part to make the first nozzle part and the second nozzle part be connected.

[0005] In the embodiment of the utility model, the resin hole in the first nozzle part has the connecting end part at the connecting surface and the merging end part merging into the valve pin hole, and the hole diameter of the resin hole in the first nozzle part gradually decreases from the connecting end part to the merging end part.

[0006] In the embodiment of the utility model, the resin hole in the first nozzle part has a connecting end part at the connecting surface and a spherical surface part at the connecting end part, and the resin hole in the first nozzle part is connected to the resin hole in the second nozzle part through the spherical surface part.

[0007] In the embodiment of the utility model, the valve pin hole extends from the connecting surface to the gate along an extension direction, the resin hole in the first nozzle part converges at the valve pin hole at a convergence position, the convergence position is closer to the gate than the center of the valve pin hole in the first nozzle part in the extension direction, and the convergence position is away from the gate.

[0008] In the embodiment of the utility model, the first nozzle part has a first groove at the connecting surface, the second nozzle part has a second groove, the position of the second groove corresponds to the first groove, and the nozzle structure of the injection molding equipment further comprises a connecting pin, one end of the connecting pin is engaged in the first groove, and the other end of the connecting pin is engaged in the second groove.

[0009] In the embodiment of the utility model, the nozzle has a circular cross section, a center line through the center of the circular cross section divides the circular cross section into two semicircular regions, the center of the valve pin hole is located in one of the two semicircular regions, and the center of the resin hole is located in the other of the two semicircular regions.

[0010] In the embodiment of the utility model, the circular cross section is divided into two semicircular blocks by a virtual line through the center of the valve pin hole and the center of the resin hole, the first groove comprises two first grooves, the second groove comprises two second grooves, one of the two first grooves and one of the two second grooves are located in one of the two semicircular blocks, and the other of the two first grooves and the other of the two second grooves are located in the other of the two semicircular blocks.

[0011] Based on the above, in the nozzle structure of the injection molding equipment of the utility model, the nozzle comprises a first nozzle part and a second nozzle part formed separately, so that the first nozzle part can be drilled in a single direction and the second nozzle part can be drilled in a single direction to form a resin hole, which makes the processing easier. In addition, this processing method can easily make the resin hole have no step difference at the connection between the first nozzle part and the second nozzle part, so that the resin flows smoothly. Furthermore, the first nozzle part and the second nozzle part are connected by the connecting piece in the form of screwing and flange engagement, so that the valve pin hole and the resin hole in the first nozzle part can be accurately located in the valve pin hole and the resin hole in the second nozzle part, respectively. Therefore, the nozzle structure of the injection molding equipment of the utility model is easy to manufacture and assemble, and can avoid the resin remaining in the flow path.

[0012] To make the above-mentioned features and advantages of this utility model more apparent and understandable, specific embodiments are described below, and detailed descriptions are provided in conjunction with the accompanying drawings. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of the nozzle structure of an injection molding equipment according to an embodiment of the present invention;

[0014] Figure 2 yes Figure 1 A three-dimensional view of a partial structure of the nozzle of an injection molding machine;

[0015] Figure 3 yes Figure 1 A partially enlarged view of the nozzle structure of an injection molding machine;

[0016] Figure 4 yes Figure 2 A cross-sectional view of the nozzle structure of an injection molding machine;

[0017] Figure 5 yes Figure 2 A perspective view of the first nozzle section;

[0018] Figure 6 Show Figure 3 The cross-section of the nozzle at the connection surface;

[0019] Figure 7 Show Figure 3 The cross-section of the nozzle at the connection surface.

[0020] Explanation of reference numerals in the attached figures:

[0021] 100: Nozzle structure of injection molding equipment;

[0022] 110: Nozzle;

[0023] 110a: First nozzle section;

[0024] 110b: Second nozzle section;

[0025] 111: Valve pin hole;

[0026] 111a: First valve pin hole;

[0027] 111b: Second valve pin hole;

[0028] 112: Resin pores;

[0029] 112a: First resin pore;

[0030] 112b: Second resin pore;

[0031] 1121: Spherical part;

[0032] 113: sprue

[0033] 130: connecting piece

[0034] 132: inner flange

[0035] 140: connecting pin

[0036] A1, A2: center axis

[0037] B1, B2: semicircular block

[0038] C1: center

[0039] C2, C3, C4: center

[0040] D: extension direction

[0041] E1: connecting end

[0042] E2: meeting end

[0043] F: flange part

[0044] L1: center line

[0045] L2: virtual line

[0046] H1: first groove

[0047] H2: second groove

[0048] P: meeting position

[0049] R1, R2: semicircular area

[0050] S: connecting surface

[0051] T: threaded part DETAILED DESCRIPTION

[0052] Figure 1 is a sectional view of a nozzle structure of an injection molding equipment according to an embodiment of the present application. Figure 2 is Figure 1 a perspective view of a partial structure of a nozzle structure of an injection molding equipment. Figure 1 and Figure 2The nozzle structure 100 of the injection molding apparatus of the present embodiment includes a nozzle 110 having a valve pin hole 111, a resin hole 112, and a gate 113. The valve pin hole 111 is connected to the gate 113 and is for insertion of a valve pin for opening and closing the gate 113, and the resin hole 112 is communicated to the valve pin hole 111 and is for passage of molten resin, which passes from the resin hole 112 to the valve pin hole 111 and is injected to a cavity of the injection molding apparatus via the gate 113.

[0053] In the present embodiment, the nozzle 110 includes a first nozzle portion 110a and a second nozzle portion 110b connected to each other, and the gate 113 is formed in the first nozzle portion 110a. The valve pin hole 111 is formed continuously in the first nozzle portion 110a and the second nozzle portion 110b in a straight line, and the resin hole 112 is formed continuously in the first nozzle portion 110a and the second nozzle portion 110b. In detail, the valve pin hole 111 includes a first valve pin hole portion 111a formed in the first nozzle portion 110a and a second valve pin hole portion 111b formed in the second nozzle portion 110b and communicated to the first valve pin hole portion 111a. The resin hole 112 includes a first resin hole portion 112a formed in the first nozzle portion 110a and a second resin hole portion 112b formed in the second nozzle portion 110b and communicated to the first resin hole portion 112a.

[0054] Figure 3 is Figure 1 a partial enlarged view of the nozzle structure of the injection molding apparatus. Please refer to Figure 3 The resin hole 112 (i.e., the second resin hole portion 112b) in the second nozzle portion 110b is separated from the valve pin hole 111, and the resin hole 112 (i.e., the first resin hole portion 112a) in the first nozzle portion 110a extends linearly from a connecting surface S of the first nozzle portion 110a and the second nozzle portion 110b to the first valve pin hole portion 111a of the valve pin hole 111 and merges into the first valve pin hole portion 111a of the valve pin hole 111. The first nozzle portion 110a has a flange portion F, and an outer surface of the second nozzle portion 110b has a threaded portion T, and the nozzle structure 100 of the injection molding apparatus further includes a connecting member 130 engaged to the flange portion F and screwed to the threaded portion T to connect the first nozzle portion 110a and the second nozzle portion 110b. In detail, the connecting member 130 has an internal thread corresponding to the threaded portion T and is screwed to the threaded portion T by the internal thread, and the connecting member 130 has an internal flange 132 and is engaged to the flange portion F by the internal flange 132, so that the flange portion F is confined between the internal flange 132 and the second nozzle portion 110b.

[0055] As described above, in the nozzle structure 100 of the injection molding apparatus of the present embodiment, the nozzle 110 includes the first nozzle portion 110a and the second nozzle portion 110b which are formed separately, so that the first nozzle portion 110a can be subjected to single-direction drilling processing and the second nozzle portion 110b can be subjected to single-direction drilling processing to form the resin hole 112, making the processing easier. In addition, this processing method easily makes the resin hole 112 have no step at the connection between the first nozzle portion 110a and the second nozzle portion 110b, making the resin flow smooth. Moreover, by connecting the first nozzle portion 110a and the second nozzle portion 110b in the screwing and flange engagement manner through the connector 130, the valve pin hole 111 (i.e., the first valve pin hole portion 111a) and the resin hole 112 (i.e., the first resin hole portion 112a) in the first nozzle portion 110a can be accurately located in the valve pin hole 111 (i.e., the second valve pin hole portion 111b) and the resin hole 112 (i.e., the second resin hole portion 112b) in the second nozzle portion 110b, respectively. Thus, the nozzle structure 100 of the injection molding apparatus of the present embodiment is easy to manufacture and assemble, and can avoid the resin remaining in the flow path.

[0056] Further, in the present embodiment, the resin hole 112 (i.e., the first resin hole portion 112a) in the first nozzle portion 110a has the connection end portion E1 located at the connection face S and the merging end portion E2 merging with the valve pin hole 111, and the hole diameter of the resin hole 112 (i.e., the first resin hole portion 112a) in the first nozzle portion 110a gradually decreases from the connection end portion E1 to the merging end portion E2. Accordingly, even if the hole diameter of the resin hole 112 (i.e., the second resin hole portion 112b) in the second nozzle portion 110b is larger than the hole diameter of the valve pin hole 111, the connection between the first resin hole portion 112a and the valve pin hole 111 can have no step by the design of the hole diameter of the resin hole 112 (i.e., the first resin hole portion 112a) gradually decreasing, so that the resin can be avoided from remaining at the connection between the first resin hole portion 112a and the valve pin hole 111.

[0057] Furthermore, in this embodiment, the resin hole 112 (i.e., the first resin hole portion 112a) in the first nozzle portion 110a has a spherical portion 1121 at the connecting end E1. The resin hole 112 (i.e., the first resin hole portion 112a) in the first nozzle portion 110a is connected to the resin hole 112 (i.e., the second resin hole portion 112b) in the second nozzle portion 110b through the spherical portion 1121. Accordingly, even if the cross-sectional shape of the resin hole 112 (i.e., the second resin hole portion 112b) in the second nozzle portion 110b is different from the cross-sectional shape of the resin hole 112 (i.e., the first resin hole portion 112a) in the first nozzle portion 110a, the design of the spherical portion 1121 can ensure that there is no step difference at the connection between the second resin hole portion 112b and the first resin hole portion 112a, thereby preventing resin residue at the connection between the second resin hole portion 112b and the first resin hole portion 112a.

[0058] In this embodiment, the first valve pin hole portion 111a of the valve pin hole 111 extends from the connecting surface S to the gate 113 along the extending direction D. The resin hole 112 (i.e., the first resin hole portion 112a) in the first nozzle portion 110a merges with the first valve pin hole portion 111a of the valve pin hole 111 at the confluence position P. The confluence position P is closer to the gate 113 than the center C1 of the valve pin hole 111 (i.e., the first valve pin hole portion 111a) in the first nozzle portion 110a in the extending direction D, and the confluence position P is farther away from the gate 113. The confluence position P is, for example, the intersection of the central axis A1 of the valve pin hole 111 and the central axis A2 of the resin hole 112. Accordingly, the distance between the confluence position P and the gate 113 will not be too large, which can further reduce the resin remaining in the valve pin hole 111. Since the confluence position P is not located at the gate 113, it can avoid the formation of excess thickness and steps at the gate 113, allowing the resin to pass smoothly through the gate 113.

[0059] Figure 4 yes Figure 2 A cross-sectional view of the nozzle structure of an injection molding machine. Figure 5 yes Figure 2 A perspective view of the first nozzle section. Please refer to... Figure 2 , Figure 4 and Figure 5In this embodiment, the first nozzle portion 110a has a first groove H1 at the connecting surface S, and the second nozzle portion 110b has a second groove H2, the position of which corresponds to the first groove H1. The nozzle structure 100 of the injection molding equipment also includes a connecting pin 140, one end of which engages with the first groove H1, and the other end of which engages with the second groove H2. Accordingly, the first nozzle portion 110a and the second nozzle portion 110b can be accurately aligned with each other by positioning the connecting pin 140. In this embodiment, for example, there are two first grooves H1, and correspondingly, there are two second grooves H2 and two connecting pins 140, but this invention is not limited thereto.

[0060] Figure 6 Show Figure 3 The nozzle's cross-section at the connection surface. The nozzle 110 of this embodiment has the following characteristics: Figure 6 The circular cross-section shown is divided into two semicircular regions R1 and R2 by the center line L1 through the center C2 of the circular cross-section. The center C3 of the valve pin hole 111 is located in the semicircular region R1, and the center C4 of the resin hole 112 is located in the semicircular region R2. Accordingly, the valve pin hole 111 and the resin hole 112 are arranged with good space efficiency, which is beneficial to the miniaturization of the nozzle 110.

[0061] Figure 7 Show Figure 3 The nozzle's cross-section at the connection surface. The nozzle 110 of this embodiment has the following characteristics: Figure 7 The circular cross-section shown is divided into two semicircular blocks B1 and B2 by a virtual line L2 connecting the center C3 of the valve pin hole 111 and the center C4 of the resin hole 112. One of the two first grooves is located within semicircular block B1, and the other of the two first grooves is located within semicircular block B2. It can be understood that since the positions of the two second grooves H2 correspond to the positions of the two first grooves H1, one of the two second grooves H2 is located within semicircular block B1, and the other of the two second grooves H2 is located within semicircular block B2. Therefore, the two first grooves H1 and the two second grooves H2 are arranged with good space efficiency, which is beneficial for the miniaturization of the nozzle 110.

[0062] In summary, in the nozzle structure of the injection molding equipment, the nozzle comprises a first nozzle part and a second nozzle part formed separately, so that the first nozzle part can be drilled in a single direction and the second nozzle part can be drilled in a single direction to form a resin hole, so that the processing is easier. In addition, this processing method easily makes the resin hole have no step difference at the connection of the first nozzle part and the second nozzle part, so that the resin flows smoothly. Moreover, the first nozzle part and the second nozzle part are connected in a screwing and flange joint manner through the connecting piece, so that the valve pin hole and the resin hole in the first nozzle part are accurately located in the valve pin hole and the resin hole in the second nozzle part respectively. Therefore, the nozzle structure of the injection molding equipment is easy to manufacture and assemble, and can avoid the resin remaining in the flow path.

[0063] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing examples, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing examples, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A nozzle structure of an injection molding apparatus, characterized by comprising: Comprising: a nozzle having a valve pin hole into which a valve pin is inserted to open and close a gate, a resin hole through which molten resin flows, and the gate, the nozzle includes a first nozzle portion and a second nozzle portion connected to each other, the valve pin hole is continuously formed in the first nozzle portion and the second nozzle portion in a straight line shape, the resin hole is continuously formed in the first nozzle portion and the second nozzle portion, the resin hole in the second nozzle portion is separated from the valve pin hole, and the resin hole in the first nozzle portion extends linearly from a connecting surface of the first nozzle portion and the second nozzle portion to the valve pin hole and merges into the valve pin hole, the gate is formed in the first nozzle portion, the first nozzle portion has a flange portion, an outer surface of the second nozzle portion has a threaded portion, the nozzle structure of the injection molding apparatus further includes a connecting member engaged with the flange portion and screwed to the threaded portion to connect the first nozzle portion and the second nozzle portion to each other.

2. The nozzle structure of the injection molding apparatus according to claim 1, wherein the resin hole in the first nozzle portion has a connecting end portion at the connecting surface and a merging end portion merging into the valve pin hole, a hole diameter of the resin hole in the first nozzle portion gradually decreases from the connecting end portion to the merging end portion.

3. The nozzle structure of the injection molding apparatus according to claim 1, wherein the resin hole in the first nozzle portion has a connecting end portion at the connecting surface and a spherical surface portion at the connecting end portion, the resin hole in the first nozzle portion is connected to the resin hole in the second nozzle portion through the spherical surface portion.

4. The nozzle structure of the injection molding apparatus according to claim 1, wherein the valve pin hole extends from the connecting surface to the gate in an extension direction, the resin hole in the first nozzle portion merges into the valve pin hole at a merging position, the merging position is closer to the gate than a center of the valve pin hole in the first nozzle portion in the extension direction, and the merging position is away from the gate.

5. The nozzle structure of the injection molding apparatus according to claim 1, wherein the first nozzle portion has a first groove at the connecting surface, the second nozzle portion has a second groove at a position corresponding to the first groove, the nozzle structure of the injection molding apparatus further includes a connecting pin having one end engaged with the first groove and the other end engaged with the second groove.

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