Door and window frame extrusion molding die

Abstract

The utility model discloses a door and window frame extrusion molding die. The door and window frame extrusion molding die comprises a head end die, a middle die and a tail end die which are connected in sequence, the head end mold comprises a mold body, a mold cavity matched with the cross section of a door and window frame in shape is formed in the front half section of the mold body, and a feeding channel communicated with the mold cavity is formed in the rear half section of the mold body. Each of the middle mold and the tail-end mold comprises an outer mold and an inner mold, the outer mold is provided with a cavity, the inner mold is located in the cavity of the outer mold, the cross section of the mold cavity formed between the inner mold and the outer mold conforms to the shape of the cross section of the door and window frame, and the inner mold of the middle mold is connected with the head-end mold. And the inner die of the tail end die is connected with the inner die of the middle die. According to the door and window frame extrusion molding die, the cooling water channel structure can uniformly cool the periphery of the die, so that each part of a profile can be uniformly cooled, and the shape stability of the profile after being discharged out of the die can be better ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mold for producing plastic steel door frame profiles. Background Art

[0002] In the prior art, door and window frames made of plastic are usually produced by extrusion. After being extruded by an extruder, the plastic enters the molding die, and the material forms a specific door and window frame shape in the mold cavity. In order to keep the shape of the door and window frame profile discharged from the cavity stable, the profile in the mold needs to be cooled. If the cooling of the profile is uneven, the profile is prone to deformation after being discharged from the mold. At the same time, the plastic raw material may contain moisture. The raw material is heated and melted in the extruder, and the moisture contained in the raw material is vaporized into water vapor. Water vapor in the mold will hinder the material from fitting with the wall of the cavity, which will cause defects such as pores on the surface of the door and window frame profile. Utility Model Content

[0003] In view of this, the purpose of the utility model is to provide a door and window frame extrusion molding die to solve the technical problems of uneven cooling of the mold and gas in the mold causing profile quality defects.

[0004] The utility model door and window frame extrusion molding die comprises a head end die, a middle die and a tail end die which are connected in sequence;

[0005] The head end mold comprises a mold body, the front half of the mold body is provided with a mold cavity conforming to the cross-sectional shape of the door and window frame, and the rear half of the mold body is provided with a feed channel connected with the mold cavity;

[0006] The middle mold and the tail mold both include an outer mold and an inner mold, the outer mold is provided with a cavity, the inner mold is located in the cavity of the outer mold, the cross section of the cavity formed between the inner mold and the outer mold is consistent with the shape of the cross section of the door and window frame, the inner mold of the middle mold is connected to the head mold, and the inner mold of the tail mold is connected to the inner mold of the middle mold;

[0007] The outer mold is composed of a front end plate, a front half mold, a rear half mold and a rear end plate connected in sequence; the front half mold and the rear half mold are provided with cooling water channels penetrating along the length direction of the cavity, and the cooling water channels are evenly distributed around the outside of the cavity. The front end plate is provided with a front groove connected to the front end of the cooling water channel and a water inlet hole connected to the front groove, and the rear end plate is provided with a rear groove connected to the rear end of the cooling water channel and a drainage hole connected to the rear groove.

[0008] Furthermore, a venting slit extending along the edge of the cavity is provided on the joining surface of the front half mold and the rear half mold, and a longitudinal air channel connected to the venting slit and a transverse air channel connected to the longitudinal air channel are provided on the front half mold or the rear half mold.

[0009] Furthermore, the depth of the venting slot in the longitudinal direction of the mold is 0.025-0.05 mm, and the width of the venting slot in the transverse direction of the mold is 5-10 mm.

[0010] Furthermore, the cross section of the upper mold cavity of the middle mold is larger than the cross section of the upper mold cavity of the tail mold, and the cross section of the upper mold cavity of the tail mold is the same as the cross section of the door and window frame.

[0011] Beneficial effects of the utility model:

[0012] 1. The cooling water channel structure of the door and window frame extrusion molding die of the utility model can evenly cool the mold around, thereby ensuring that all parts of the profile are cooled evenly, thereby better ensuring the stability of the shape of the profile after it is discharged from the mold.

[0013] 2. The utility model door and window frame extrusion molding die is provided with an exhaust structure, and the transverse airway is connected to the vacuum pump through a pipeline. During the production process, the gas in the mold is successively extracted by the vacuum pump through the exhaust seam, the longitudinal airway and the transverse airway, thereby preventing the gas from staying in the mold and causing the problem of pore defects in the profile. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the three-dimensional structure of the door and window frame extrusion molding die in the embodiment.

[0015] Figure 2 It is a schematic diagram of the three-dimensional structure of the head end mold.

[0016] Figure 3 This is a stereoscopic image of the head end mold from another perspective.

[0017] Figure 4 This is a three-dimensional view of the tail end mold.

[0018] Figure 5 A perspective view of the front end panel.

[0019] Figure 6 A perspective view of the rear end plate.

[0020] Figure 7 This is a three-dimensional image of the front half of the mold. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] As shown in the figure, the door and window frame extrusion molding die of this embodiment includes a head end mold, a middle mold and a tail end mold which are connected in sequence.

[0023] The head end mold comprises a mold body 1, the front half of which is provided with a mold cavity 2 conforming to the cross-sectional shape of the door and window frame, and the rear half of which is provided with a feed channel 3 communicating with the mold cavity.

[0024] Both the middle mold 4 and the tail mold 5 include an outer mold and an inner mold 6. The outer mold is provided with a cavity, and the inner mold is located in the cavity of the outer mold. The cross section of the cavity 7 formed between the inner mold and the outer mold is consistent with the shape of the cross section of the door and window frame. The inner mold of the middle mold is connected to the head mold, and the inner mold of the tail mold is connected to the inner mold of the middle mold; in the specific implementation, the inner mold can be connected by welding or by pinning and positioning screws.

[0025] The outer mold is composed of a front end plate 8, a front half mold 9, a rear half mold 10 and a rear end plate 11 connected in sequence; the front half mold and the rear half mold are provided with cooling water channels 12 that penetrate along the length direction of the cavity, and the cooling water channels are evenly distributed around the outside of the cavity. The front end plate is provided with a front groove 13 connected to the front end of the cooling water channel and a water inlet hole 14 connected to the front groove, and the rear end plate 11 is provided with a rear groove 15 connected to the rear end of the cooling water channel and a drainage hole 16 connected to the rear groove.

[0026] In the present door and window frame extrusion molding die, during the production process, the material discharged from the extruder enters the head end die from the feed channel 3, and the feed channel 3 evenly distributes the material around the mold cavity 2, so that the material can enter the mold cavity 2 along the groove. Then, after the material is discharged from the head end die, it enters the middle die and the tail end die in turn, and the material gradually transforms into the required door and window frame under the constraints of the mold cavity of the middle die and the tail end die. In this embodiment, the middle die 4 and the tail end die 5 are respectively provided with cooling water channels consisting of a water inlet 14, a front groove 13, a cooling water channel 12, a rear groove 15 and a drain hole 16. During the production process, cooling water is supplied to the cooling water channel, and the mold and the material in the mold are cooled by cooling water, so that the stability of the shape of the profile after it is discharged from the mold can be ensured. In this embodiment, the cooling water channels 12 are evenly arranged along the edge of the mold cavity, which can ensure the consistency of cooling of various parts of the profile, and thus can better ensure the stability of the shape of the profile after it leaves the mold.

[0027] As an improvement to the above embodiment, the joint surface of the front half mold and the rear half mold is provided with an exhaust slit 17 extending along the edge of the cavity, and the front half mold or the rear half mold is provided with a longitudinal air channel 18 connected to the exhaust slit and a transverse air channel 19 connected to the longitudinal air channel. During production, the transverse air channel is connected to the vacuum pump through a pipeline, and the gas in the mold is successively pumped out by the vacuum pump through the exhaust slit, the longitudinal air channel and the transverse air channel, thereby avoiding the problem of pore defects in the profile caused by the gas staying in the mold. In a specific implementation, the depth of the exhaust slit in the longitudinal direction of the mold is preferably 0.025-0.05mm, and the width of the exhaust slit in the transverse direction of the mold is 5-10mm. Since the depth of the exhaust slit is very small, only gas can enter the exhaust slit and be discharged, while material cannot enter the discharge slit.

[0028] As an improvement to the above embodiment, the cross section of the upper mold cavity of the middle mold is larger than the cross section of the upper mold cavity of the tail mold, and the cross section of the upper mold cavity of the tail mold is the same as the cross section of the door and window frame. This improvement allows the material to be squeezed to a certain extent when entering the tail mold from the middle mold, which can increase the compactness of the material and further improve the quality of the door and window frame profile.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. Door and window frame extrusion molding die, characterized by: It includes a head end mold, a middle mold and a tail end mold which are connected in sequence; The head end mold comprises a mold body, the front half of the mold body is provided with a mold cavity conforming to the cross-sectional shape of the door and window frame, and the rear half of the mold body is provided with a feed channel communicating with the mold cavity; The middle mold and the tail mold both include an outer mold and an inner mold, the outer mold is provided with a cavity, the inner mold is located in the cavity of the outer mold, the cross section of the cavity formed between the inner mold and the outer mold is consistent with the shape of the cross section of the door and window frame, the inner mold of the middle mold is connected to the head mold, and the inner mold of the tail mold is connected to the inner mold of the middle mold; The outer mold is composed of a front end plate, a front half mold, a rear half mold and a rear end plate connected in sequence; the front half mold and the rear half mold are provided with cooling water channels penetrating along the length direction of the cavity, and the cooling water channels are evenly distributed around the outside of the cavity. The front end plate is provided with a front groove connected to the front end of the cooling water channel and a water inlet hole connected to the front groove, and the rear end plate is provided with a rear groove connected to the rear end of the cooling water channel and a drainage hole connected to the rear groove.

2. The door and window frame extrusion molding die according to claim 1, characterized in that: The mating surfaces of the front and rear molds are provided with exhaust slits extending along the edge of the cavity, and the front or rear molds are provided with longitudinal air passages communicating with the exhaust slits and transverse air passages communicating with the longitudinal air passages.

3. The door and window frame extrusion molding die according to claim 2, characterized in that: The depth of the venting slot in the longitudinal direction of the mold is 0.025-0.05 mm, and the width of the venting slot in the transverse direction of the mold is 5-10 mm.

4. The door and window frame extrusion molding die according to claim 1, characterized in that: The cross section of the upper mold cavity of the middle mold is larger than the cross section of the upper mold cavity of the tail mold, and the cross section of the upper mold cavity of the tail mold is the same as the cross section of the door and window frame.

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