Bottle preform mold of high-speed injection molding machine
By setting open grooves and multiple bends in the cooling channels in the screw-in fittings, the problem of poor cooling at the preform neck was solved, achieving uniform and rapid cooling and improving production quality and efficiency.
Patent Information
- Application Number
- CN202423252158.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-27
- Publication Date
- 2025-12-05
- Estimated Expiration
- 2034-12-27
AI Technical Summary
In the production process of existing 3-gallon and 5-gallon preform molds, poor cooling at the bottle neck leads to problems such as shrinkage, irregular shape, and flow marks. Furthermore, shortening the cone position makes the mold prone to eccentricity.
An opening groove and multiple bends in the threaded part are provided. The coolant channel outlets are symmetrically distributed around the injection channel. The threaded part and the mounting base are positioned by a conical surface fit to ensure that the preform opening is close to the coolant channel. The bends in the coolant channel improve the cooling efficiency.
It achieves uniform and rapid cooling of the preform neck, improves production yield, avoids mold eccentricity and product deformation, and enhances production efficiency.
Smart Images
Figure CN223630854U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to injection molding equipment technical field, concretely relates to a high -speed injection molding machine bottle embryo mould. BACKGROUND
[0002] The existing plastic bottle production usually puts the bottle blank into the blow mold after heating, and inflates it with compressed air to form the final shape of the bottle; when producing three-gallon and five-gallon bottle embryos, a specific high-speed injection molding machine is usually used for production, which has a fast production cycle and high cooling requirements for the bottle embryo. The three-gallon and five-gallon bottle embryos are relatively large and use a lot of material, and the bottle mouth, screw thread, and thick glue position far from the gate end are prone to poor cooling due to the limitations of the mold structure. When continuously producing, the product bottle mouth at the thick position shrinks, is shaped differently, and is difficult to vent, causing the product to deform and affecting the seal.
[0003] The existing three-gallon and five-gallon bottle embryo production mold is usually composed of a screw port piece and a cavity as shown in Figure 1 The bottle mouth of the bottle embryo is usually formed at the screw port piece, and the bottle body is formed in the cavity. The two sides of the screw port piece are usually tapered positions for holding. Due to the presence of the tapered position, the cooling water channel is far from the bottle embryo mouth, causing the bottle mouth of the produced bottle embryo to shrink severely, and there are problems such as uneven shrinkage, different shapes, flow lines, and air lines.
[0004] Shortening the tapered position of the screw port piece and moving the cooling water channel to the bottle embryo mouth can solve the cooling problem of the bottle embryo mouth, but the length of the tapered position is too short, causing the tapered position to not hold tightly, and the mold and product to be easily eccentric.
[0005] Therefore, there is an urgent need for a mold that can both hold tightly and achieve fast and uniform cooling of the five-gallon bottle embryo mouth. UTILITY MODEL CONTENTS
[0006] To overcome the shortcomings of the prior art, the utility model provides a high-speed injection molding machine bottle embryo mold that can achieve uniform and rapid cooling when producing five-gallon bottle embryos on a high-speed injection molding machine.
[0007] The technical solution of the utility model is as follows:
[0008] A high-speed injection molding machine bottle embryo mold includes a core, a mounting seat, a screw port piece, and a cavity, which are coaxially arranged in sequence, characterized in that a positioning end extending to both sides is formed in the middle of the screw port piece, and the outer surface of the positioning end is a tapered surface.
[0009] An open slot is provided in the middle of the positioning end, the bottom of the open slot forms an injection channel that penetrates the screw port piece, the opening diameter of the injection channel is smaller than the diameter of the open slot, and a threaded groove is provided in the middle of the injection channel.
[0010] The hollow cooling liquid channel is formed in the screw port and is arranged adjacent to the outside of the injection channel.
[0011] The outlet of the cooling liquid channel is arranged on the outside of the screw port, and a plurality of the cooling liquid channels are symmetrically distributed on the circumference of the injection channel.
[0012] The cooling liquid channel has a multi-segment bending structure, and includes a transverse segment and a longitudinal segment connected to each other, the direction of the transverse segment is perpendicular to the cooling liquid channel, and the direction of the longitudinal segment is the same as that of the cooling liquid channel.
[0013] The injection channel further has a bottle mouth groove formed near one end of the opening groove, the bottle mouth groove is arranged between the injection channel and the opening groove, and the side wall of the bottle mouth groove is an arc surface.
[0014] The cross-sectional diameter of the injection channel far from one end of the opening groove is greater than that of the middle part of the injection channel.
[0015] The injection core, the mounting seat and the screw port are sequentially positioned through taper surface matching, one end of the mounting seat extends into the opening groove of the screw port, the injection core extends into the cavity, and the injection core, the mounting seat and the injection channel form a product cavity.
[0016] The connecting flange is further arranged, the connecting flange is sleeved on the opening end of the cavity, a concentric groove matched with the positioning end is formed in the middle part of the connecting flange, the screw port is arranged in the middle part of the connecting flange, and the positioning end is matched with the concentric groove.
[0017] The injection core includes a base and an injection pipe connected to each other, the mounting seat is sleeved on the injection pipe and is screwed to the base, an exhaust gap is arranged between the injection pipe and the mounting seat, and the exhaust gap is close to the base.
[0018] The first fixed groove and the second fixed groove are arranged on both sides of the mounting seat, the bottoms of the first fixed groove and the second fixed groove are communicated to form a positioning channel, and the side walls of the positioning channel and the first fixed groove are inverted conical.
[0019] The middle part of the first fixed groove is further provided with an embedded part, when the mounting seat is connected to the screw port, the embedded part extends into the opening groove, and the embedded part and the inner side wall of the opening groove form an empty step.
[0020] The further technical scheme of the embodiment is that the screw port piece is integrally formed.
[0021] Compared with the prior art, the utility model has the following advantages:
[0022] The mold in the embodiment is provided with an opening groove on the screw port piece, the mounting seat can extend into the opening groove, the product cavity end part formed by the core injection, the mounting seat, the screw port piece and the cavity is closer to the middle part of the screw port piece, the bottle mouth part of the thicker end part of the bottle embryo is closer to the cooling liquid channel, so that the bottle mouth can be cooled more uniformly and quickly, and the production yield of the bottle embryo is improved. BRIEF DESCRIPTION OF DRAWINGS
[0023] In order to more clearly illustrate the technical scheme in the embodiment 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 some embodiments of the utility model, and other drawings can be obtained according to these drawings without creative labor for those skilled in the art.
[0024] Figure 1 It is a structural schematic view of the bottle embryo mold in the prior art;
[0025] Figure 2 It is a structural schematic view of the bottle embryo mold after the taper position is shortened;
[0026] Figure 3 It is a structural schematic view of the bottle embryo mold of the high-speed injection molding machine of the utility model;
[0027] Figure 4 It is Figure 3 It is an enlarged view of A in the middle;
[0028] Figure 5 It is Figure 1 It is a three-dimensional structural view of the screw port piece in the middle;
[0029] Figure 6 It is a front view of the screw port piece in the utility model;
[0030] Figure 7 It is a side sectional view of the screw port piece in the utility model;
[0031] Figure 8 It is a top view of the screw port piece in the utility model.
[0032] IDENTIFICATION OF DRAWINGS:
[0033] 1-core injection; 11-base; 12-injection pipe; 13-exhaust gap;
[0034] 2-mounting seat; 21-first fixing groove; 22-second fixing groove; 23-fitting part; 24-clearance step;
[0035] 3-threaded part; 31-positioning end; 32-opening groove; 33-cooling liquid channel; 34-bottle mouth groove; 331-transverse section; 332-longitudinal section;
[0036] 4-cavity;
[0037] 5-connecting flange. DETAILED DESCRIPTION
[0038] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.
[0039] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and thus 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 thus cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", "fourth", etc. are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0040] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", and "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0041] The existing three-gallon and five-gallon bottle embryo production mold is usually composed of a threaded part and a cavity connected together, as shown in Figure 1 The bottle mouth of the bottle embryo is usually formed at the threaded part, and the bottle body is formed in the cavity. The two sides of the threaded part are usually tapered for holding, as shown in Figure 5As shown, since the two sides of the screw piece need to be positioned by the taper position, the thickness of the taper position cannot be opened to the cooling water channel, and the cooling water channel can only be set in the middle of the screw piece, which causes the cooling water channel to be far away from the bottle embryo opening, and the bottle embryo opening cannot be fully cooled. In order to solve the cooling problem of the bottle embryo opening, first of all, the length of the taper position is shortened, such as Figure 2 As shown, so that the bottle embryo opening is closer to the cooling liquid channel in the middle of the screw piece, but another problem brought by this is that the length of the taper position is too short, causing the taper surface positioning of the mold to not be tightly held, and the mold and the product are easy to be eccentric in the production process.
[0042] Based on this, as Figure 3 As shown, the utility model discloses a high -speed injection molding machine bottle embryo mold, including injection core 1, mounting seat 2, screw piece 3 and cavity 4, injection core 1, mounting seat 2, screw piece 3 and cavity 4 are coaxial in turn. Injection core 1, mounting seat 2 and screw piece 3 are sequentially positioned through taper surface cooperation, one end of mounting seat 2 extends into the opening slot 32 of screw piece 3, injection core 1 extends into the bottom of cavity 4, and the middle injection core 1 is surrounded by the peripheral mounting seat 2, screw piece 3 and cavity 4 to form a product cavity for bottle embryo forming. After the mold is locked in place, the molten plastic is filled into the product forming space through the cavity bottom glue inlet.
[0043] As shown in Figure 7 The middle part of the screw piece 3 forms a positioning end 31 extending to both sides, and the outer surface of the positioning end 31 is a taper surface. An opening slot 32 is arranged in the middle of the positioning end 31, and the bottom of the opening slot 32 forms an injection channel penetrating through the screw piece 3. The opening diameter of the injection channel is smaller than the diameter of the opening slot 32, and a threaded groove is arranged in the middle of the injection channel. A hollow cooling liquid channel 33 is also formed in the screw piece 3, and the cooling liquid channel 33 is arranged adjacent to the outside of the injection channel. By opening the opening slot 32 in the screw piece 3, the bottle embryo opening of the product cavity is moved to a position closer to the cooling water channel in the middle of the screw piece 3, thereby realizing the cooling of the bottle embryo opening. In order to make the bottle embryo the same as the mold before improvement, the height of the embedding part 23 of the mounting seat 2 is the same as the depth of the opening slot 32 to ensure that the shape of the product cavity remains unchanged.
[0044] As shown in Figure 6 to Figure 8As shown, the outlet of the cooling liquid channel 33 is arranged on the outside of the screw mouth part 3, and several cooling liquid channels 33 are symmetrically arranged on the circumference of the injection channel. Specifically, the cooling liquid channel 33 is a multi-segment bending structure, and the cooling liquid channel 33 comprises a transverse segment 331 and a longitudinal segment 332 connected with each other, the direction of the transverse segment 331 is perpendicular to the cooling liquid channel 33, and the direction of the longitudinal segment 332 is the same as that of the cooling liquid channel 33. The transverse segment 331 and the longitudinal segment 332 are perpendicular to each other, and at least two transverse segments 331 and one longitudinal segment 332 are arranged to form a first layer of water cooling and a second layer of water cooling in the middle part of the screw mouth part 3, so as to sufficiently improve the cooling efficiency of the bottle embryo mouth.
[0045] As shown in the drawings, Figure 3 As shown, the injection channel further forms a bottle mouth groove 34 near one end of the opening groove 32, the bottle mouth groove 34 is arranged between the injection channel and the opening groove 32, and the side wall of the bottle mouth groove 34 is an arc surface. The bottle mouth groove 34 cooperates with the mounting seat 2 to form the surrounding edge of the bottle embryo mouth.
[0046] Specifically, the cross-sectional diameter of the injection channel far away from one end of the opening groove 32 is greater than the cross-sectional diameter of the middle part of the injection channel. The end far away from one end of the opening groove 32 is connected with the cavity 4, and the bottle embryo body is mainly formed in the cavity 4, so as to smoothly transition the thickness from the bottle embryo mouth to the bottle embryo body in the product cavity, and improve the bottle embryo forming rate.
[0047] As shown in the drawings, Figure 3 As shown, the connecting flange 5 is sleeved on the opening end of the cavity 4, a concentric groove adapted to the positioning end 31 is formed in the middle part of the connecting flange 5, the screw mouth part 3 is arranged in the middle part of the connecting flange 5, and the positioning end 31 is in close contact with the concentric groove. The connecting flange 5 further locks the components of the mold through the taper surface.
[0048] Specifically, the core injection 1 comprises a base 11 and an injection pipe 12 connected with each other, the mounting seat 2 is sleeved on the injection pipe 12 and is screw-connected to the base 11, and an exhaust gap 13 is arranged between the injection pipe 12 and the mounting seat 2, and the exhaust gap 13 is close to the base 11.
[0049] As shown in the drawings, Figure 8 As shown, the mounting seat 2 is provided with a first fixing groove 21 and a second fixing groove 22 on both sides, respectively, the bottoms of the first fixing groove 21 and the second fixing groove 22 are communicated to form a positioning channel, and the side walls of the positioning channel and the first fixing groove 21 are inverted conical; the directions of the two inverted conical shapes are opposite, the injection pipe 12 is fixed in the position through the positioning channel in the middle part of the mounting seat 2, and simultaneously extends into the cavity 4.
[0050] Further, the middle part of the first fixed groove 21 is provided with an embedded part 23, when the mounting seat 2 is connected with the screw part 3, the embedded part 23 extends into the open groove 32, and the embedded part 23 and the inner side wall of the open groove 32 form an empty step 24. It can be understood that the top end of the embedded part 23 is also provided with a groove, so as to cooperate with the screw part 3 to form the bottle mouth extension of the bottle embryo. The thickness of the embedded part 23 is slightly smaller than the distance between the open groove 32 and the injection core 1, thereby forming an empty step 24 of 1mm-3mm. The high-temperature and high-pressure gas generated at the front end of the injection core 1 is temporarily stored in the empty step 24 when injection molding, and is discharged outside the mold, thereby quickly discharging the gas outside the mold. The screw mouth has a good cooling water channel, which can quickly cool, thereby realizing high-quality and high-efficiency production.
[0051] Preferably in the embodiment, the screw part 3 is integrally formed. It can be understood that the screw part 3 is divided into two parts at the parting surface, and the screw parts 3 on both sides can be machined respectively or integrally machined and then separated.
[0052] The above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A high speed injection molding machine preform mold characterized by, The application relates to a product cavity forming device, which comprises a core (1), a mounting base (2), a screw mouth part (3) and a cavity (4), the core (1), the mounting base (2), the screw mouth part (3) and the cavity (4) are coaxially arranged in sequence and form a product cavity, a positioning end (31) extending to both sides is formed in the middle of the screw mouth part (3), and the outer surface of the positioning end (31) is a conical surface. An open slot (32) is arranged in the middle of the positioning end (31), the bottom of the open slot (32) forms an injection channel penetrating through the screw mouth part (3), the opening diameter of the injection channel is smaller than the diameter of the open slot (32), and a threaded groove is arranged in the middle of the injection channel. A hollow cooling liquid channel (33) is further formed in the screw mouth part (3), and the cooling liquid channel (33) is arranged adjacent to the outer side of the injection channel.
2. The high speed injection molding machine preform mold of claim 1 wherein, The outlet of the cooling liquid channel (33) is arranged on the outer side of the screw mouth part (3), and a plurality of the cooling liquid channels (33) are symmetrically distributed on the circumference of the injection channel.
3. The high speed injection molding machine preform mold of claim 1 wherein, The cooling liquid channel (33) is a multi-section bending structure, and comprises a transverse section (331) and a longitudinal section (332) connected with each other, the direction of the transverse section (331) is perpendicular to the cooling liquid channel (33), and the direction of the longitudinal section (332) is the same as that of the cooling liquid channel (33).
4. The high speed injection molding machine preform mold of claim 1 wherein, A bottle mouth slot (34) is further arranged near one end of the open slot (32), the bottle mouth slot (34) is arranged in transition between the injection channel and the open slot (32), and the side wall of the bottle mouth slot (34) is an arc surface.
5. The high speed injection molding machine preform mold of claim 1 wherein, The cross-sectional diameter of the injection channel far from one end of the open slot (32) is larger than that of the middle part of the injection channel.
6. The high speed injection molding machine preform mold of claim 1 wherein, The core (1), the mounting base (2) and the screw mouth part (3) are sequentially positioned through conical surface cooperation, one end of the mounting base (2) extends into the open slot (32) of the screw mouth part (3), the core (1) extends into the cavity (4), and the core (1), the mounting base (2) and the injection channel form a product cavity.
7. The high speed injection molding machine preform mold of claim 1 wherein, A connecting flange (5) is further arranged, the connecting flange (5) is sleeved on the opening end of the cavity (4), a concentric groove matched with the positioning end (31) is formed in the middle of the connecting flange (5), the screw mouth part (3) is arranged in the middle of the connecting flange (5), and the positioning end (31) is matched with the concentric groove.
8. The high speed injection molding machine preform mold of claim 1 wherein, The core (1) comprises a base (11) and an injection pipe (12) connected with each other, the mounting base (2) is sleeved on the injection pipe (12) and is screw-connected to the base (11), an exhaust gap (13) is arranged between the injection pipe (12) and the mounting base (2), and the exhaust gap (13) is close to the base (11).
9. The high speed injection molding machine preform mold of claim 1 wherein, First and second fixing slots (21) and (22) are respectively arranged on the two sides of the mounting base (2), the bottoms of the first and second fixing slots (21) and (22) are communicated to form a positioning channel, and the side walls of the positioning channel and the first fixing slot (21) are inverted conical surfaces. The middle part of the first fixed groove (21) is also provided with a fitting part (23), when the mounting seat (2) is connected with the screw part (3), the fitting part (23) extends into the opening groove (32), and the fitting part (23) and the inner side wall of the opening groove (32) form a clearance step (24).
10. The high speed injection molding machine preform mold of claim 1 wherein, The screw part (3) is integrally formed.